6-K

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

Form 6-K

REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE
SECURITIES EXCHANGE ACT OF 1934

For the month of August 2018

Commission File Number 001-35466

GasLog Ltd.
(Translation of registrant's name into English)

c/o GasLog Monaco S.A.M.
Gildo Pastor Center
7 Rue du Gabian
MC 98000, Monaco
(Address of principal executive office)

Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F.

Form 20-F ý      Form 40-F o

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(1):    o

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(7):    o

        The press release issued by GasLog Ltd. on August 2, 2018 relating to its results for the second quarter of 2018 and the related financial report are attached hereto as Exhibits 99.1 and 99.2, respectively.

INCORPORATION BY REFERENCE

        Exhibit 99.2 to this Report on Form 6-K shall be incorporated by reference into our registration statements on Form F-3 (File Nos. 333-194894 and 333-210169), initially filed with the Securities and Exchange Commission (the "SEC") on March 28, 2014 and March 14, 2016, respectively, as amended, and the registration statement on Form S-8 (File No. 333-187020), filed with the SEC on March 4, 2013, in each case to the extent not superseded by information subsequently filed or furnished (to the extent we expressly state that we incorporate such furnished information by reference) by us under the Securities Act of 1933 or the Securities Exchange Act of 1934, in each case as amended.

EXHIBIT LIST

Exhibit	Description
99.1	Press Release dated August 2, 2018
99.2	Financial Report for the Three and Six Months Ended June 30, 2018
	Management's Discussion and Analysis of Financial Condition and Results of Operation
	Unaudited Condensed Consolidated Financial Statements
101.INS	XBRL Instance Document
101.SCH	XBRL Taxonomy Extension Schema
101.CAL	XBRL Taxonomy Extension Scheme Calculation Linkbase
101.DEF	XBRL Taxonomy Extension Scheme Definition Linkbase
101.LAB	XBRL Taxonomy Extension Scheme Label Linkbase
101.PRE	XBRL Taxonomy Extension Scheme Presentation Linkbase

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SIGNATURES

        Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

Date: August 2, 2018
	GASLOG LTD.,
		by	/s/ Paul Wogan
			Name:	Paul Wogan
			Title:	Chief Executive Officer

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EX-99.1

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Exhibit 99.1

Press Release

GasLog Ltd. Reports Financial Results for the Quarter Ended June 30, 2018

Monaco, August 2, 2018, GasLog Ltd. and its subsidiaries ("GasLog", "Group" or "Company") (NYSE: GLOG), an international owner, operator and manager of liquefied natural gas ("LNG") carriers, today reported its financial results for the quarter ended June 30, 2018.

Highlights

•

Signed a multi-year charter party with Pioneer Shipping Limited, a wholly owned subsidiary of Centrica plc ("Centrica"), for a newbuild LNG carrier. The vessel, a 180,000 cubic meter ("cbm") LNG carrier to be built by Samsung Heavy Industries Co., Ltd. ("Samsung") with dual fuel two stroke engine propulsion ("LP-2S"), is scheduled for delivery in the third quarter of 2020.

•

Completed the sale of the GasLog Gibraltar to GasLog Partners LP ("GasLog Partners" or the "Partnership") for $207.0 million on April 26, 2018. Part of the consideration was satisfied by the private issuance of $45.0 million of common units in GasLog Partners to GasLog.

•

Completion of the dry-docking of, and installation of reliquefaction modules, on the GasLog Santiago and the GasLog Sydney, enhancing the commercial competitiveness of both vessels.

•

GasLog Partners announced a new time charter for the GasLog Sydney for 18 months with a wholly owned subsidiary of Cheniere Energy, Inc. ("Cheniere"), scheduled to commence between September and December 2018.

•

Revenues of $132.8 million (Q2 2017: $129.9 million), Profit of $14.2 million (Q2 2017: $6.9 million) and Loss per share of $0.08⁽¹⁾ (Q2 2017: Loss per share of $0.12) for the quarter ended June 30, 2018.

•

EBITDA⁽²⁾ of $92.6 million (Q2 2017: $87.4 million) and Adjusted EBITDA⁽²⁾ of $92.9 million (Q2 2017: $87.4 million), Adjusted Profit⁽²⁾ of $14.8 million (Q2 2017: $14.4 million) and Adjusted Loss per share⁽²⁾ of $0.07⁽¹⁾ (Q2 2017: Adjusted Loss per share of $0.03) for the quarter ended June 30, 2018.

•

Quarterly dividend of $0.15 per common share payable on August 23, 2018, 7.1% higher than the second quarter of 2017.

⁽¹⁾

Earnings/(loss) per share ("EPS") and Adjusted EPS are net of the profit attributable to the non-controlling interests of $17.8 million and the dividend on preferred stock of $2.5 million for the quarter ended June 30, 2018 ($14.4 million and $2.5 million, respectively, for the quarter ended June 30, 2017).

⁽²⁾

EBITDA, Adjusted EBITDA, Adjusted Profit and Adjusted EPS are non-GAAP financial measures and should not be used in isolation or as a substitute for GasLog's financial results presented in accordance with International Financial Reporting Standards ("IFRS"). For the definitions and reconciliations of these measures to the most directly comparable financial measures calculated and presented in accordance with IFRS, please refer to Exhibit II at the end of this press release.

CEO Statement

Paul Wogan, Chief Executive Officer, stated: "We continued to execute our long-term strategy in the second quarter with the announcement of a new seven-year time charter party with a wholly owned subsidiary of Centrica. Against this, we ordered a newbuild 180,000 cbm LNG carrier with LP-2S propulsion from Samsung for delivery in the third quarter of 2020. We now have five newbuilds on order for delivery in 2019 and 2020, three of which have committed multi-year charters, while the two uncommitted newbuilds are expected to deliver into an attractive LNG shipping market.

As we anticipated, there was seasonal weakening in demand for LNG and for LNG shipping in the second quarter. LNG shipping spot rates troughed in late April but then more than doubled through June, driven by counter seasonal strength in LNG demand and Asian pricing that provided a clear arbitrage opportunity between the

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Atlantic and Pacific Basins. If this recent momentum is maintained through the 2018/19 winter, we expect the future financial performance of our spot vessels to show significant improvement on the second quarter of 2018.

The longer-term supply and demand fundamentals for LNG remain very positive, with China's LNG imports, in particular, increasing 50% year-on-year in the first half of 2018. On the back of these robust fundamentals, Cheniere took a final investment decision ("FID") on Corpus Christi Train 3 which was the first new liquefaction FID since June 2017. We have seen momentum pick up for new, long-term offtake contracts which should encourage further new liquefaction FIDs within the next 12 to 18 months. GasLog is well positioned to capitalize on the shipping requirements for any new LNG supply.

LNG Market Update and Outlook

Demand for natural gas and LNG remains robust, underpinned in the second quarter by significant increases in demand from major Asian consumers. According to Poten, LNG imports into China, South Korea and India during the first half of 2018 increased 50%, 14% and 10%, respectively, year-on-year, marginally offset by a 3% reduction in Japan's LNG imports. In particular, the growth in China's LNG demand is attributed to the secular driver of coal-to-gas switching, strong industrial demand and constrained domestic gas production. The backdrop for growth in global LNG demand remains favorable, with Wood Mackenzie estimating compound annual growth of 6% over the 2017-2023 period.

Wood Mackenzie estimates that during the second quarter of 2018 global LNG supply increased by 8% year-over-year, but declined 3% from the first quarter of 2018. The year-on-year increase was driven by the start-up of new liquefaction capacity in the United States ("US"), Russia and Australia, while the sequential decline is attributed to normal seasonal weakness in the spring shoulder months, supply disruptions from PNG LNG following an earthquake earlier this year, underperformance from projects in Algeria and Trinidad and unplanned downtime of facilities in the United Arab Emirates. These disruptions offset new liquefaction startups in the quarter which included Cameroon Floating LNG, Cove Point and Wheatstone LNG Train 2. In the second quarter of 2018, 75 cargoes were exported from the US, with around half of these cargoes delivered to Asia. Data from the second quarter of 2018 suggests that 1.91 vessels were required for each million tonnes of LNG exported from the US, compared to an average of 1.86 ships per million tonnes of LNG since the start-up of Sabine Pass.

Progress was made during the quarter on projects that underpin Wood Mackenzie's 2018 LNG supply growth forecast of 9%. Commissioning cargoes were introduced to the Ichthys and Prelude facilities, while Yamal Train 2 (Russia) and Elba Island (US) are also expected onstream before year-end. A further 41 million tonnes per annum ("mtpa") of new supply, or 13% growth, is expected in 2019, principally driven by additions in the US and the ramp-up of Ichthys and Prelude in Australia.

In May, Cheniere announced a FID on Train 3 at the Corpus Christi Liquefaction Project, the first approval of a new liquefaction project since June 2017 and the first in the US since 2015. According to Wood Mackenzie and press reports, in the second quarter of 2018, 15 mtpa of long-term supply contracts were agreed or signed, bringing the total volume of long-term supply contracts concluded since the beginning of 2017 to 52 mtpa. Buyers include Asian and European utilities as well as portfolio suppliers and traders. Several recent offtake contracts for projects yet to reach FID have been for a duration of 20 years or more, giving these projects greater visibility on cashflows which may de-risk the financing required for FID. LNG Canada, which is targeting 24 mtpa of capacity in a phased approach and where Petronas took a 25% stake in May, may take FID later in 2018, while FID on the Golden Pass project (16 mtpa capacity) in the US may be taken in early 2019. Mozambique Area 1 LNG (13 mtpa capacity) and the Calcasieu Pass (10 mtpa capacity) project in the US have also made progress in the second quarter towards potential FIDs in 2019.

During the second quarter, Panama became the 42^nd country to import LNG after commencing operations at its Costa Norte terminal. Plans have also progressed to import LNG into eastern Australia's gas market to alleviate potential shortages in the future. Pakistan's Ambassador to the US outlined plans in early July to import more gas from the US, claiming that the country is on its way to becoming "one of the world's largest gas importers". In May, Chinese gas distributor ENN was reportedly seeking a commissioning cargo for the country's first privately owned LNG regasification terminal. The Zhoushan terminal has a planned capacity of 3 mtpa and is expected to come onstream in the coming months.

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Headline daily spot tri-fuel diesel electric ("TFDE") LNG shipping rates as reported by Clarksons averaged $54,000 in the second quarter, compared to $34,000 in the second quarter of 2017. During the period, rates exhibited counter-seasonal strength, rising to $87,000 per day in late June from $38,000 per day in late April. This recent, sharp increase in headline spot rates was driven by increased vessel demand, as LNG suppliers sought to capitalize on the arbitrage between the Atlantic basin and Asian markets, which was widened by counter-seasonal strength in Asian LNG prices (as measured by the Platts Japan-Korea Marker ("JKM") assessment). As a result, the number of spot fixtures rose to 110 during the second quarter of 2018, an all-time high and an increase over the 70 and 78 fixtures in the first quarter of 2018 and second quarter of 2017, respectively. Spot TFDE shipping rates have moderated in recent weeks, with a current Clarksons assessment of $75,000 per day, as softening Asia LNG prices have narrowed the near-term arbitrage opportunity. However, based on current JKM pricing, the arbitrage between the Atlantic and Pacific Basins is expected to remain open for the 2018/19 Northern Hemisphere winter, suggesting that the recent increase in LNG shipping rates could potentially be sustained throughout the remainder of 2018 and into early 2019.

According to Poten and press reports, 26 firm orders for LNG carriers have been made so far in 2018, of which three are GasLog vessels. The pace of firm newbuild orders has recently increased, as shipowners look to lock in attractive yard pricing against a positive backdrop for LNG vessel demand. However, even after taking into account the current orderbook, we believe that the LNG shipping market could be short of vessels as soon as 2019 based on current supply and demand projections. The earliest a newbuilding can now be delivered is 2021, which points towards a tighter market in 2019 and 2020, again underpinning the outlook for shipping rates. Based on our analysis and excluding the current orderbook, 28-56 additional vessels may be needed by 2022 to satisfy projected market growth, with this range increasing to 105-137 additional vessels by 2025.

Additional Vessel

On May 30, 2018, GasLog confirmed the order of a 180,000 cbm GTT Mark III Flex LNG Carrier with LP-2S propulsion (Hull No. 2262) from Samsung that is scheduled to be delivered in the third quarter of 2020. The vessel will be chartered to Pioneer Shipping Limited, a wholly owned subsidiary of Centrica, for an initial period of seven years.

Completion of Dropdown of the GasLog Gibraltar

On April 26, 2018, GasLog completed the sale of 100% of the ownership interest in GAS-fourteen Ltd., the entity which owns the GasLog Gibraltar, to GasLog Partners, for an aggregate purchase price of $207.0 million, which includes $1.0 million of positive net working capital. In connection with the sale, GasLog was issued $45.0 million of newly issued, privately placed common units (1,858,975 common units at a price of $24.21 per unit) of GasLog Partners as partial consideration.

Alexandroupolis Project Update

During the quarter, Gastrade S.A. ("Gastrade") and the stakeholders in the Alexandroupolis project continued their efforts to move the project towards FID. The parties have finalized the majority of the terms under which both the Greek national gas utility DEPA and Bulgarian Energy Holding ("BEH") would take a shareholding in the project. Preparations have been ongoing during the quarter for the launch of a market test for potential users and the invitation to tender for various elements of the project, with both expected to commence in the near-term. Gastrade and its partners continue to target an end-2018 FID.

New Charter Agreements

On June 18, 2018, GasLog Partners entered into a new time charter for the GasLog Sydney for 18 months with Cheniere Marketing International LLP, a wholly owned subsidiary of Cheniere, scheduled to commence between September and December 2018. The charterer has options to extend the charter for up to two consecutive periods of six months at escalating rates. The GasLog Sydney is a 155,000 cbm TFDE LNG carrier built in 2013 and currently concluding a multi-year time charter with a wholly owned subsidiary of Royal Dutch Shell plc ("Shell") in September 2018. The vessel recently completed a scheduled dry-docking during which its commercial competitiveness was enhanced through the installation of a reliquefaction module.

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In addition, GasLog entered into an agreement with a major LNG producer for an approximately seven-month charter for the GasLog Houston, a 174,000 cbm low pressure, LP-2S propulsion, which commenced in June 2018 and ends on delivery of the vessel into her long-term charter with Shell in the beginning of 2019.

GasLog Partners' At-the-Market Common Units Equity Offering Programme (the "ATM Programme")

On May 16, 2017, GasLog Partners commenced an ATM Programme under which the Partnership may, from time to time, raise equity through the issuance and sale of new common units having an aggregate offering price of up to $100.0 million in accordance with the terms of an equity distribution agreement entered into on the same date. Citigroup Global Markets Inc., Merrill Lynch, Pierce, Fenner & Smith Incorporated, Credit Suisse Securities (USA) LLC and Morgan Stanley & Co. LLC agreed to act as sales agents. On November 3, 2017, the size of the ATM Programme was increased to $144.0 million and UBS Securities LLC was included as a sales agent.

Since the commencement of the ATM Programme through June 30, 2018, GasLog Partners has issued and received payment for a total of 2,738,425 common units, with cumulative gross proceeds of $62.9 million at a weighted average price of $22.97 per unit, representing a discount of 0.5% to the volume weighted average trading price of GasLog Partners' common units on the days on which new common units were issued. As of June 30, 2018, the cumulative net proceeds were $61.2 million.

In the second quarter of 2018, GasLog Partners issued and received payment for an additional 1,020 common units at a weighted average price of $24.25 per common unit for total gross and net proceeds of $0.02 million.

Dividend Declaration

On May 11, 2018, the board of directors declared a dividend on the Series A Preference Shares of $0.546875 per share, or $2.5 million in aggregate, payable on July 2, 2018 to holders of record as of June 29, 2018. GasLog paid the declared dividend to the transfer agent on June 28, 2018.

On August 1, 2018, the board of directors declared a quarterly cash dividend of $0.15 per common share, or $12.1 million in the aggregate, payable on August 23, 2018 to shareholders of record as of August 13, 2018.

Financial Summary

	For the three months ended
Amounts in thousands of U.S. dollars except per share data	June 30, 2017			June 30, 2018
Revenues	$	129,930		$	132,824
EBITDA(1)	$	87,409		$	92,564
Adjusted EBITDA(1)	$	87,352		$	92,947
Profit for the period	$	6,904		$	14,212
Adjusted Profit(1)	$	14,419		$	14,788
Loss attributable to the owners of GasLog	$	(7,515	)	$	(3,620	)
EPS, basic	$	(0.12	)	$	(0.08	)
Adjusted EPS(1)	$	(0.03	)	$	(0.07	)

⁽¹⁾

Adjusted Profit, EBITDA, Adjusted EBITDA and Adjusted EPS are non-GAAP financial measures and should not be used in isolation or as a substitute for GasLog's financial results presented in accordance with IFRS. For definitions and reconciliations of these measurements to the most directly comparable financial measures calculated and presented in accordance with IFRS, please refer to Exhibit II at the end of this press release.

There were 2,249 operating days for the quarter ended June 30, 2018, as compared to 2,081 operating days for the quarter ended June 30, 2017. The increase in operating days resulted mainly from the deliveries of the GasLog Houston, the GasLog Hong Kong and the GasLog Genoa on January 8, 2018, March 20, 2018 and March 29, 2018, respectively, partially offset by the off-hire days from the dry-dockings of the GasLog Santiago and the GasLog Sydney.

Revenues were $132.8 million for the quarter ended June 30, 2018 ($129.9 million for the quarter ended June 30, 2017). The increase was mainly driven by the new deliveries in our fleet (the GasLog Houston, the GasLog Hong Kong and the GasLog Genoa), partially offset by the decreased revenues from vessels operating in the spot market,

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the increased off-hire days due to dry-dockings (two extended dry-dockings in the second quarter of 2018 as opposed to no dry-dockings in the second quarter of 2017) and the decrease due to the expiration of the long-term time charter of the GasLog Shanghai and her entering into the spot market.

Net pool allocation was $7.0 million for the quarter ended June 30, 2018 ($0.5 million for the quarter ended June 30, 2017). The increase was attributable to the movement in the adjustment of the net pool results generated by the GasLog vessels in accordance with the pool distribution formula. GasLog recognized gross revenues and gross voyage expenses and commissions of $5.0 million and $2.2 million, respectively, from the operation of its vessels in the Cool Pool during the quarter ended June 30, 2018 (June 30, 2017: $8.0 million and $1.7 million, respectively). The increase in GasLog's total net pool performance compared to the quarter ended June 30, 2017 was driven by higher spot rates and higher utilization achieved by all vessels trading in the Cool Pool. GasLog's total net pool performance is presented below:

	For the three months ended
Amounts in thousands of U.S. Dollars	June 30, 2017			June 30, 2018
Pool gross revenues (included in Revenues)	$	8,023		$	5,047
Pool gross voyage expenses and commissions (included in Voyage expenses and commissions)		(1,682	)		(2,165	)
GasLog's adjustment for net pool allocation (included in Net pool allocation)		492			6,958
GasLog's total net pool performance	$	6,833		$	9,840

Voyage expenses and commissions were $4.6 million for the quarter ended June 30, 2018 ($3.3 million for the quarter ended June 30, 2017). The increase resulted mainly from the increased voyage expenses of the vessels operating in the spot market and an increase in bunkers consumed during off-hire and unchartered periods for the remaining vessels of the fleet.

Vessel operating and supervision costs were $32.7 million for the quarter ended June 30, 2018 ($29.8 million for the quarter ended June 30, 2017). The increase was mainly attributable to the deliveries of the GasLog Houston, the GasLog Hong Kong and the GasLog Genoa operating in our fleet for the full second quarter in 2018, partially offset by one-off savings in certain crew expenses.

Depreciation was $38.8 million for the quarter ended June 30, 2018 ($34.5 million for the quarter ended June 30, 2017). The increase resulted from the deliveries of the GasLog Houston, the GasLog Hong Kong and the GasLog Genoa on January 8, 2018, March 20, 2018 and March 29, 2018, respectively.

General and administrative expenses were $10.4 million for the quarter ended June 30, 2018 ($10.2 million for the quarter ended June 30, 2017).

Financial costs were $42.0 million for the quarter ended June 30, 2018 ($37.1 million for the quarter ended June 30, 2017). The increase was attributable to the increased weighted average debt outstanding as a result of the debt drawdowns for the vessels delivered in 2018 and the increased weighted average interest rate deriving from

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the upward movement of the USD London Interbank Offered Rate ("LIBOR") rates. An analysis of the financial costs is set forth below.

	For the three months ended
Amounts in thousands of U.S. dollars	June 30, 2017			June 30, 2018
Financial costs
Amortization and write-off of deferred loan/bond issuance costs/premium	$	(2,978	)	$	(3,232	)
Interest expense on loans		(21,099	)		(28,066	)
Interest expense on bonds and realized loss on cross-currency swaps ("CCS")		(8,451	)		(7,442	)
Finance lease charge		(2,722	)		(2,634	)
Loss arising on NOK bond repurchase at a premium		(1,459	)		—
Other financial costs		(369	)		(626	)
Total	$	(37,078	)	$	(42,000	)

Gain on derivatives was $1.2 million for the quarter ended June 30, 2018 ($9.7 million loss for the quarter ended June 30, 2017). The increase in gain on derivatives in the second quarter of 2018, as compared to the second quarter of 2017, is mainly attributable to the $4.4 million decrease in loss that was reclassified from equity to the statement of profit or loss, an increase of $3.6 million in gain from mark-to-market valuation of our derivative financial instruments carried at fair value through profit or loss, derived mainly from the higher LIBOR yield curve which was used to estimate the present value of the estimated future cash flows compared to the agreed fixed interest rates and an increase of $3.2 million in realized gain on interest rate swaps held for trading. An analysis of gain on derivatives is set forth below.

	For the three months ended
Amounts in thousands of U.S. dollars	June 30, 2017			June 30, 2018
(Loss)/gain on derivatives
Realized (loss)/gain on interest rate swaps held for trading	$	(2,226	)	$	1,003
Realized gain on forward foreign exchange contracts held for trading		361			357
Unrealized (loss)/gain on derivative financial instruments held for trading		(3,487	)		74
Recycled loss of cash flow hedges reclassified to profit or loss		(4,368	)		—
Ineffective portion of cash flow hedges		—			(267	)
Total	$	(9,720	)	$	1,167

There was a profit of $14.2 million for the quarter ended June 30, 2018 ($6.9 million profit for the quarter ended June 30, 2017). This increase in profit is mainly attributable to the increase in gain on derivatives and the increase in profit from operations due to the factors mentioned above, partially offset by the increase in financial costs.

Adjusted Profit⁽¹⁾ was $14.8 million for the quarter ended June 30, 2018 ($14.4 million for the quarter ended June 30, 2017) adjusted for the effects of the non-cash gain on derivatives, the write-off of unamortized loan fees as well as the net foreign exchange gains/losses.

Loss attributable to the owners of GasLog was $3.6 million for the quarter ended June 30, 2018 ($7.5 million loss for the quarter ended June 30, 2017). The decrease in loss attributable to the owners of GasLog resulted mainly from the respective movements in profit mentioned above, partially offset by the increased amount allocated to third parties as a result of GasLog Partners' ATM Programme initiated in May 2017, the preference unit issuances in May 2017 and January 2018, and the sale of four vessels to GasLog Partners.

EBITDA⁽¹⁾ was $92.6 million for the quarter ended June 30, 2018 ($87.4 million for the quarter ended June 30, 2017). The increase in EBITDA was driven by the increase in net revenues, partially offset by the increase in vessel operating expenses as discussed above.

Adjusted EBITDA⁽¹⁾ was $92.9 million for the quarter ended June 30, 2018 ($87.4 million for the quarter ended June 30, 2017).

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Loss per share was $0.08 for the quarter ended June 30, 2018 (a loss of $0.12 for the quarter ended June 30, 2017). The decrease in loss per share is mainly attributable to the respective movements in loss attributable to the owners of GasLog discussed above.

Adjusted Loss per share⁽¹⁾ was $0.07 for the quarter ended June 30, 2018 (a loss of $0.03 for the quarter ended June 30, 2017), adjusted for the effects of the non-cash loss on derivative financial instruments and the net foreign exchange gains/losses.

⁽¹⁾

Adjusted Profit, EBITDA, Adjusted EBITDA and Adjusted EPS are non-GAAP financial measures and should not be used in isolation or as a substitute for GasLog's financial results presented in accordance with IFRS. For definitions and reconciliations of these measurements to the most directly comparable financial measures calculated and presented in accordance with IFRS, please refer to Exhibit II at the end of this press release.

Contracted Charter Revenues

GasLog's contracted charter revenues are estimated to increase from $486.0 million for the fiscal year 2017 to $548.8 million for the fiscal year 2019, based on contracts in effect as of June 30, 2018, without including any extension options. As of June 30, 2018, the total future firm contracted revenue stood at $3.2 billion⁽¹⁾, including the vessels owned by GasLog Partners but excluding the vessels operating in the spot market.

⁽¹⁾

Contracted revenue calculations assume: (a) 365 revenue days per annum, with 30 off-hire days when the ship undergoes scheduled dry-docking (every five years) and ten additional off-hire days for the enhancement of one vessel; (b) all LNG carriers on order are delivered on schedule; and (c) no exercise of any option to extend the terms of charters.

Liquidity and Capital Resources

As of June 30, 2018, GasLog had $314.4 million of cash and cash equivalents, of which $189.2 million was held in time deposits and the remaining balance in current accounts. Moreover, as of June 30, 2018, GasLog had $26.0 million held in time deposits with an initial duration of more than three months but less than a year that have been classified as short-term investments and $2.3 million in restricted cash, which consisted of a guarantee held for a vessel with respect to the enhancement of its operational performance.

As of June 30, 2018, GasLog had an aggregate of $2.9 billion of indebtedness outstanding under its credit facilities and bond agreements, of which $182.6 million was repayable within one year, and a $209.8 million finance lease liability related to the sale and leaseback of the Methane Julia Louise, of which $6.5 million was repayable within one year.

As of June 30, 2018, there was undrawn available capacity of $100.0 million under the revolving credit facility of the credit agreement of up to $1.1 billion entered into on July 19, 2016 (the "Legacy Facility Refinancing").

As of June 30, 2018, the total remaining balance of the contract prices of the five LNG carriers on order was $875.9 million that GasLog expects to be funded with the $165.8 million undrawn capacity under the financing agreement entered into on October 16, 2015, as well as cash balances, cash from operations and borrowings under new debt agreements.

As of June 30, 2018, GasLog's current assets totaled $389.6 million, while current liabilities totaled $324.7 million, resulting in a positive working capital position of $64.9 million.

During the second quarter, GasLog terminated, extended or signed new interest rate swap agreements maintaining the total notional amount as of June 30, 2018 at $1.2 billion. GasLog has hedged 46.2% of its expected floating interest rate exposure on its outstanding debt (excluding the finance lease liability) as of June 30, 2018.

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Future Deliveries

GasLog has five newbuildings on order at Samsung which are on schedule and within budget:

LNG Carrier	Year Built(1)	Shipyard	Cargo Capacity (cbm)	Charterer	Propulsion	Estimated Charter Expiration(2)
Hull No. 2131	Q1 2019	Samsung	174,000	Shell	LP-2S	2029
Hull No. 2212	Q3 2019	Samsung	180,000	—	LP-2S	—
Hull No. 2213	Q2 2020	Samsung	180,000	Centrica	LP-2S	2027
Hull No. 2274	Q2 2020	Samsung	180,000	—	LP-2S	—
Hull No. 2262	Q3 2020	Samsung	180,000	Centrica	LP-2S	2027

⁽¹⁾

Expected delivery quarters are presented.

⁽²⁾

Charter expiration to be determined based upon actual date of delivery.

Conference Call

GasLog will host a conference call to discuss its results for the second quarter of 2018 at 8:30 a.m. EDT (1:30 p.m. BST) on Thursday, August 2, 2018. Paul Wogan, Chief Executive Officer, and Alastair Maxwell, Chief Financial Officer, will review the Company's operational and financial performance for the period. Management's presentation will be followed by a Q&A session.

The dial-in numbers for the conference call are as follows:
+1 855 253 8928 (USA)
+44 20 3107 0289 (United Kingdom)
+33 1 70 80 71 53 (France)
+852 3011 4522 (Hong Kong)

Conference ID: 8436589

A live webcast of the conference call will also be available on the investor relations page of the Company's website at http://www.gaslogltd.com/investor-relations.

For those unable to participate in the conference call, a replay will also be available from 12:00 p.m. EDT (5:00 p.m. BST) on Thursday, August 2, 2018 until 12:00 p.m. EDT (5:00 p.m. BST) on Thursday, August 9, 2018.

The replay dial-in numbers are as follows:
+1 855 859 2056 (USA)
+44 20 3107 0235 (United Kingdom)
+33 1 70 80 71 79 (France)
+852 3011 4541 (Hong Kong)

Replay passcode: 8436589

The replay will also be available via a webcast in the investor relations page of the Company's website at http://www.gaslogltd.com/investor-relations.

About GasLog

GasLog is an international owner, operator and manager of LNG carriers providing support to international energy companies as part of their LNG logistics chain. GasLog's consolidated owned fleet consists of 30 LNG carriers (25 ships on the water and five on order). GasLog also has an additional LNG carrier which was sold to a subsidiary of Mitsui & Co. Ltd. and leased back under a long-term bareboat charter. GasLog's consolidated fleet currently includes 13 LNG carriers in operation owned by GasLog Partners. GasLog's principal executive offices are at Gildo Pastor Center, 7 Rue du Gabian, MC 98000, Monaco. Visit GasLog's website at http://www.gaslogltd.com.

11

Forward Looking Statements

All statements in this press release that are not statements of historical fact are "forward-looking statements" within the meaning of the U.S. Private Securities Litigation Reform Act of 1995. Forward-looking statements include statements that address activities, events or developments that the Company expects, projects, believes or anticipates will or may occur in the future, particularly in relation to our operations, cash flows, financial position, liquidity and cash available for dividends or distributions, plans, strategies, business prospects and changes and trends in our business and the markets in which we operate. We caution that these forward-looking statements represent our estimates and assumptions only as of the date of this press release, about factors that are beyond our ability to control or predict, and are not intended to give any assurance as to future results. Any of these factors or a combination of these factors could materially affect future results of operations and the ultimate accuracy of the forward-looking statements. Accordingly, you should not unduly rely on any forward-looking statements.

Factors that might cause future results and outcomes to differ include, but are not limited to, the following:

•

general LNG shipping market conditions and trends, including spot and long-term charter rates, ship values, factors affecting supply and demand of LNG and LNG shipping, technological advancements and opportunities for the profitable operations of LNG carriers;

•

fluctuations in spot and long-term charter hire rates and vessel values;

•

changes in our operating expenses, including crew wages, maintenance, dry-docking and insurance costs and bunker prices;

•

number of off-hire days and dry-docking requirements including our ability to complete scheduled dry-dockings on time and within budget;

•

planned capital expenditures and availability of capital resources to fund capital expenditures;

•

our ability to maximize the use of our vessels, including the re-deployment or disposition of vessels no longer under long-term time charter commitments, including the risk that certain of our vessels may no longer have the latest technology at such time, which may impact the rate at which we can charter such vessels;

•

our ability to maintain long term relationships and enter into time charters with new and existing customers;

•

increased exposure to the spot market and fluctuations in spot charter rates;

•

fluctuations in prices for crude oil, petroleum products and natural gas, including LNG;

•

changes in the ownership of our charterers;

•

our customers' performance of their obligations under our time charters and other contracts;

•

our future operating performance and expenses, financial condition, liquidity and cash available for dividends and distributions;

•

our ability to obtain financing to fund capital expenditures, acquisitions and other corporate activities, funding by banks of their financial commitments, and our ability to meet our restrictive covenants and other obligations under our credit facilities;

•

future, pending or recent acquisitions of or orders for ships or other assets, business strategy, areas of possible expansion and expected capital spending;

•

the time that it may take to construct and deliver newbuildings and the useful lives of our ships;

•

fluctuations in currencies and interest rates;

•

the expected cost of and our ability to comply with environmental and regulatory conditions, including changes in laws and regulations or actions taken by regulatory authorities, governmental organizations, classification societies and standards imposed by our charterers applicable to our business;

•

risks inherent in ship operation, including the risk of accidents, collisions and the discharge of pollutants;

•

our ability to retain key employees and the availability of skilled labour, ship crews and management;

•

potential disruption of shipping routes due to accidents, political events, piracy or acts by terrorists;

•

potential liability from future litigation;

•

any malfunction or disruption of information technology systems and networks that our operations rely on or any impact of a possible cybersecurity breach; and

•

other risks and uncertainties described in the Company's Annual Report on Form 20-F filed with the SEC on February 28, 2018 and available at http://www.sec.gov.

12

We undertake no obligation to update or revise any forward-looking statements contained in this press release, whether as a result of new information, future events, a change in our views or expectations or otherwise, except as required by applicable law. New factors emerge from time to time, and it is not possible for us to predict all of these factors. Further, we cannot assess the impact of each such factor on our business or the extent to which any factor, or combination of factors, may cause actual results to be materially different from those contained in any forward-looking statement.

The declaration and payment of dividends are at all times subject to the discretion of our board of directors and will depend on, amongst other things, risks and uncertainties described above, restrictions in our credit facilities, the provisions of Bermuda law and such other factors as our board of directors may deem relevant.

Contacts:
Alastair Maxwell
Chief Financial Officer
Phone: +44-203-388-3100

Phil Corbett
Head of Investor Relations
Phone: +44-203-388-3116

Joseph Nelson
Deputy Head of Investor Relations
Phone: +1-212-223-0643

Email: ir@gaslogltd.com

13

EXHIBIT I—Unaudited Interim Financial Information

Unaudited condensed consolidated statements of financial position
As of December 31, 2017 and June 30, 2018
(Amounts expressed in thousands of U.S. Dollars)

	December 31, 2017			June 30, 2018
Assets
Non-current assets
Goodwill		9,511			9,511
Investment in associates		20,800			20,489
Deferred financing costs		17,519			4,134
Other non-current assets		428			1,820
Derivative financial instruments		16,012			31,440
Tangible fixed assets		3,772,566			4,378,295
Vessels under construction		166,655			89,956
Vessel held under finance lease		214,329			210,646
Total non-current assets		4,217,820			4,746,291
Current assets
Trade and other receivables		10,706			18,817
Dividends receivable and other amounts due from related parties		8,666			8,075
Derivative financial instruments		2,199			6,206
Inventories		6,839			9,722
Prepayments and other current assets		4,569			4,132
Short-term investments		—			26,000
Restricted cash		—			2,321
Cash and cash equivalents		384,092			314,369
Total current assets		417,071			389,642
Total assets		4,634,891			5,135,933
Equity and liabilities
Equity
Preference shares		46			46
Share capital		810			810
Contributed surplus		911,766			883,314
Reserves		18,347			18,890
Treasury shares		(6,960	)		(4,472	)
(Accumulated deficit)/retained earnings		(5,980	)		9,894
Equity attributable to owners of the Group		918,029			908,482
Non-controlling interests		845,105			954,587
Total equity		1,763,134			1,863,069
Current liabilities
Trade accounts payable		11,526			12,098
Ship management creditors		2,394			1,847
Amounts due to related parties		35			72
Derivative financial instruments		1,815			1,109
Other payables and accruals		93,418			120,565
Borrowings, current portion		179,367			182,556
Finance lease liability, current portion		6,302			6,485
Total current liabilities		294,857			324,732
Non-current liabilities
Derivative financial instruments		—			1,149
Borrowings, non-current portion		2,368,189			2,742,255
Finance lease liability, non-current portion		207,126			203,355
Other non-current liabilities		1,585			1,373
Total non-current liabilities		2,576,900			2,948,132
Total equity and liabilities		4,634,891			5,135,933

14

Unaudited condensed consolidated statements of profit or loss
For the three and six months ended June 30, 2017 and 2018
(Amounts expressed in thousands of U.S. Dollars, except per share data)

	For the three months ended						For the six months ended
	June 30, 2017			June 30, 2018			June 30, 2017			June 30, 2018
Revenues		129,930			132,824			258,215			271,302
Net pool allocation		492			6,958			1,320			15,611
Voyage expenses and commissions		(3,319	)		(4,634	)		(6,191	)		(9,915	)
Vessel operating and supervision costs		(29,833	)		(32,703	)		(57,322	)		(67,016	)
Depreciation		(34,451	)		(38,813	)		(68,159	)		(74,342	)
General and administrative expenses		(10,246	)		(10,352	)		(20,225	)		(22,365	)
Profit from operations		52,573			53,280			107,638			113,275
Financial costs		(37,078	)		(42,000	)		(69,602	)		(78,597	)
Financial income		744			1,294			1,135			2,310
(Loss)/gain on derivatives		(9,720	)		1,167			(9,722	)		18,938
Share of profit of associates		385			471			847			827
Total other expenses, net		(45,669	)		(39,068	)		(77,342	)		(56,522	)
Profit for the period		6,904			14,212			30,296			56,753
Attributable to:
Owners of the Group		(7,515	)		(3,620	)		1,237			15,684
Non-controlling interests		14,419			17,832			29,059			41,069
		6,904			14,212			30,296			56,753
(Loss)/earnings per share – basic and diluted		(0.12	)		(0.08	)		(0.05	)		0.13

15

Unaudited condensed consolidated statements of cash flows
For the six months ended June 30, 2017 and 2018
(Amounts expressed in thousands of U.S. Dollars)

	For the six months ended
	June 30, 2017			June 30, 2018
Cash flows from operating activities:
Profit for the period		30,296			56,753
Adjustments for:
Depreciation		68,159			74,342
Share of profit of associates		(847	)		(827	)
Financial income		(1,135	)		(2,310	)
Financial costs		69,602			78,597
Unrealized foreign exchange (gain)/loss on cash and cash equivalents		(538	)		63
Unrealized loss/(gain) on derivative financial instruments held for trading, including ineffective portion of cash flow hedges		1,172			(16,705	)
Recycled loss of cash flow hedges reclassified to profit or loss		4,368			—
Share-based compensation		2,235			2,515
		173,312			192,428
Movements in working capital		(5,344	)		(1,712	)
Cash provided by operations		167,968			190,716
Interest paid		(63,853	)		(63,914	)
Net cash provided by operating activities		104,115			126,802
Cash flows from investing activities:
Payments for tangible fixed assets, vessels under construction and vessel held under finance lease		(63,010	)		(588,929	)
Dividends received from associate		1,043			500
Return of contributed capital from associate		59			—
Other investments		(13,944	)		—
Purchase of short-term investments		(20,000	)		(36,000	)
Maturity of short-term investments		28,000			10,000
Restricted cash		—			(2,321	)
Financial income received		1,126			2,124
Net cash used in investing activities		(66,726	)		(614,626	)
Cash flows from financing activities:
Proceeds from bank loans and bonds		280,000			498,225
Bank loans and bonds repayments		(276,158	)		(108,958	)
Payment of loan issuance costs		(6,234	)		(7,295	)
Proceeds from GasLog Partners' public common unit offerings (net of underwriting discounts and commissions)		87,840			24
Proceeds from GasLog Partners' preference unit offering (net of underwriting discounts and commissions)		139,222			111,544
Payment of equity raising costs		(336	)		(660	)
Payment for NOK bond repurchase at a premium		(1,459	)		—
Payment for cross currency swaps' termination		(20,603	)		—
Purchase of treasury shares		—			(62	)
Proceeds from stock options' exercise		137			157
Dividends paid		(53,019	)		(71,223	)
Payments for finance lease liability		(13	)		(3,588	)
Net cash provided by financing activities		149,377			418,164
Effects of exchange rate changes on cash and cash equivalents		538			(63	)
Increase/(decrease) in cash and cash equivalents		187,304			(69,723	)
Cash and cash equivalents, beginning of the period		227,024			384,092
Cash and cash equivalents, end of the period		414,328			314,369

16

EXHIBIT II

Non-GAAP Financial Measures:

EBITDA, Adjusted EBITDA, Adjusted Profit and Adjusted EPS

EBITDA is defined as earnings before depreciation, amortization, financial income and costs, gain/loss on derivatives and taxes. Adjusted EBITDA is defined as EBITDA before foreign exchange gains/losses. Adjusted Profit represents earnings before write-off and accelerated amortization of unamortized loan fees/bond fees and premium, foreign exchange gains/losses and non-cash gain/loss on derivatives that includes (if any) (a) unrealized gain/loss on derivative financial instruments held for trading, (b) recycled loss of cash flow hedges reclassified to profit or loss and (c) ineffective portion of cash flow hedges. Adjusted EPS represents earnings attributable to owners of the Group before non-cash gain/loss on derivatives as defined above, foreign exchange gains/losses and write-off and accelerated amortization of unamortized loan/bond fees and premium, divided by the weighted average number of shares outstanding. EBITDA, Adjusted EBITDA, Adjusted Profit and Adjusted EPS are non-GAAP financial measures that are used as supplemental financial measures by management and external users of financial statements, such as investors, to assess our financial and operating performance. We believe that these non-GAAP financial measures assist our management and investors by increasing the comparability of our performance from period to period. We believe that including EBITDA, Adjusted EBITDA, Adjusted Profit and Adjusted EPS assists our management and investors in (i) understanding and analyzing the results of our operating and business performance, (ii) selecting between investing in us and other investment alternatives and (iii) monitoring our ongoing financial and operational strength in assessing whether to purchase and/or to continue to hold our common shares. This is achieved by excluding the potentially disparate effects between periods of, in the case of EBITDA and Adjusted EBITDA, financial costs, gain/loss on derivatives, taxes, depreciation and amortization; in the case of Adjusted EBITDA, foreign exchange gains/losses; and in the case of Adjusted Profit and Adjusted EPS, non-cash gain/loss on derivatives, foreign exchange gains/losses and write-off and accelerated amortization of unamortized loan/bond fees and premium, which items are affected by various and possibly changing financing methods, financial market conditions, capital structure and historical cost basis, and which items may significantly affect results of operations between periods.

EBITDA, Adjusted EBITDA, Adjusted Profit and Adjusted EPS have limitations as analytical tools and should not be considered as alternatives to, or as substitutes for, or superior to, profit, profit from operations, earnings per share or any other measure of operating performance presented in accordance with IFRS. Some of these limitations include the fact that they do not reflect (i) our cash expenditures or future requirements for capital expenditures or contractual commitments, (ii) changes in, or cash requirements for, our working capital needs and (iii) the cash requirements necessary to service interest or principal payments on our debt. Although depreciation and amortization are non-cash charges, the assets being depreciated and amortized will have to be replaced in the future, and EBITDA and Adjusted EBITDA do not reflect any cash requirements for such replacements. EBITDA, Adjusted EBITDA, Adjusted Profit and Adjusted EPS are not adjusted for all non-cash income or expense items that are reflected in our statements of cash flows and other companies in our industry may calculate these measures differently than we do, limiting their usefulness as a comparative measure.

In evaluating Adjusted EBITDA, Adjusted Profit and Adjusted EPS, you should be aware that in the future we may incur expenses that are the same as or similar to some of the adjustments in this presentation. Our presentation of Adjusted EBITDA, Adjusted Profit and Adjusted EPS should not be construed as an inference that our future results will be unaffected by the excluded items. Therefore, the non-GAAP financial measures as presented below may not be comparable to similarly titled measures of other companies in the shipping or other industries.

17

Reconciliation of Profit to EBITDA and Adjusted EBITDA:
(Amounts expressed in thousands of U.S. Dollars)

	For the three months ended						For the six months ended
	June 30, 2017			June 30, 2018			June 30, 2017			June 30, 2018
Profit for the period		6,904			14,212			30,296			56,753
Depreciation		34,451			38,813			68,159			74,342
Financial costs		37,078			42,000			69,602			78,597
Financial income		(744	)		(1,294	)		(1,135	)		(2,310	)
Loss/(gain) on derivatives		9,720			(1,167	)		9,722			(18,938	)
EBITDA		87,409			92,564			176,644			188,444
Foreign exchange (gains)/losses, net		(57	)		383			46			29
Adjusted EBITDA		87,352			92,947			176,690			188,473

Reconciliation of Profit to Adjusted Profit:
(Amounts expressed in thousands of U.S. Dollars)

	For the three months ended					For the six months ended
	June 30, 2017			June 30, 2018		June 30, 2017		June 30, 2018
Profit for the period		6,904			14,212		30,296		56,753
Non-cash loss/(gain) on derivatives		7,855			193		5,540		(16,705	)
Write-off of unamortized loan/bond fees and premium		(283	)		—		293		—
Foreign exchange (gains)/losses, net		(57	)		383		46		29
Adjusted Profit		14,419			14,788		36,175		40,077

Reconciliation of (Loss)/Earnings Per Share to Adjusted (Loss)/Earnings Per Share:
(Amounts expressed in thousands of U.S. Dollars, except shares and per share data)

	For the three months ended						For the six months ended
	June 30, 2017			June 30, 2018			June 30, 2017			June 30, 2018
(Loss)/profit for the period attributable to owners of the Group		(7,515	)		(3,620	)		1,237			15,684
Plus:
Dividend on preference shares		(2,516	)		(2,516	)		(5,031	)		(5,032	)
(Loss)/profit for the period available to owners of the Group used in EPS calculation		(10,031	)		(6,136	)		(3,794	)		10,652
Weighted average number of shares outstanding, basic		80,624,124			80,801,654			80,592,912			80,758,631
(Loss)/earnings per share		(0.12	)		(0.08	)		(0.05	)		0.13
(Loss)/profit for the period available to owners of the Group used in EPS calculation		(10,031	)		(6,136	)		(3,794	)		10,652
Plus:
Non-cash loss/(gain) on derivatives		7,855			193			5,540			(16,705	)
Write-off of unamortized loan/bond fees and premium		(283	)		—			293			—
Foreign exchange (gains)/losses, net		(57	)		383			46			29
Adjusted (loss)/profit attributable to owners of the Group		(2,516	)		(5,560	)		2,085			(6,024	)
Weighted average number of shares outstanding, basic		80,624,124			80,801,654			80,592,912			80,758,631
Adjusted (loss)/earnings per share		(0.03	)		(0.07	)		0.03			(0.07	)

18

QuickLinks

Exhibit 99.1

Press Release GasLog Ltd. Reports Financial Results for the Quarter Ended June 30, 2018

EX-99.2

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Exhibit 99.2

Financial Report for the Three and Six Months Ended June 30, 2018

Management's Discussion and Analysis of Financial Condition and Results of Operation

        The following is a discussion of our financial condition and results of operations for the three and six-month periods ended June 30, 2017 and June 30, 2018. Unless otherwise specified herein, references to "GasLog", the "Company", the "Group", "we", "our" or "us" shall include GasLog Ltd. and its subsidiaries. You should read this section in conjunction with our unaudited condensed consolidated financial statements and related notes included elsewhere in this report. For additional information relating to our management's discussion and analysis of financial condition and results of operation, please see our Annual Report on Form 20-F filed with the U.S. Securities and Exchange Commission (the "SEC") on February 28, 2018. This discussion includes forward-looking statements which, although based on assumptions that we consider reasonable, are subject to risks and uncertainties which could cause actual events or conditions to differ materially from those currently anticipated and expressed or implied by such forward-looking statements. See also discussion in the section entitled "Forward-Looking Statements" below.

Forward-Looking Statements

        All statements in this report that are not statements of historical fact are "forward-looking statements" within the meaning of the U.S. Private Securities Litigation Reform Act of 1995. Forward-looking statements include statements that address activities, events or developments that the Company expects, projects, believes or anticipates will or may occur in the future, particularly in relation to our operations, cash flows, financial position, liquidity and cash available for dividends or distributions, plans, strategies, business prospects and changes and trends in our business and the markets in which we operate. We caution that these forward-looking statements represent our estimates and assumptions only as of the date of this press release, about factors that are beyond our ability to control or predict, and are not intended to give any assurance as to future results. Any of these factors or a combination of these factors could materially affect future results of operations and the ultimate accuracy of the forward-looking statements. Accordingly, you should not unduly rely on any forward-looking statements.

        Factors that might cause future results and outcomes to differ include, but are not limited to, the following:

•

general LNG shipping market conditions and trends, including spot and long-term charter rates, ship values, factors affecting supply and demand of LNG and LNG shipping, technological advancements and opportunities for the profitable operations of LNG carriers;

•

fluctuations in spot and long-term charter hire rates and vessel values;

•

changes in our operating expenses, including crew wages, maintenance, dry-docking and insurance costs and bunker prices;

•

number of off-hire days and dry-docking requirements including our ability to complete scheduled dry-dockings on time and within budget;

•

planned capital expenditures and availability of capital resources to fund capital expenditures;

•

our ability to maximize the use of our vessels, including the re-deployment or disposition of vessels no longer under long-term time charter commitments, including the risk that certain of our vessels may no longer have the latest technology at such time, which may impact the rate at which we can charter such vessels;

•

our ability to maintain long term relationships and enter into time charters with new and existing customers;

•

increased exposure to the spot market and fluctuations in spot charter rates;

•

fluctuations in prices for crude oil, petroleum products and natural gas, including LNG;

•

changes in the ownership of our charterers;

•

our customers' performance of their obligations under our time charters and other contracts;

•

our future operating performance and expenses, financial condition, liquidity and cash available for dividends and distributions;

19

•

our ability to obtain financing to fund capital expenditures, acquisitions and other corporate activities, funding by banks of their financial commitments, and our ability to meet our restrictive covenants and other obligations under our credit facilities;

•

future, pending or recent acquisitions of or orders for ships or other assets, business strategy, areas of possible expansion and expected capital spending;

•

the time that it may take to construct and deliver newbuildings and the useful lives of our ships;

•

fluctuations in currencies and interest rates;

•

the expected cost of and our ability to comply with environmental and regulatory conditions, including changes in laws and regulations or actions taken by regulatory authorities, governmental organizations, classification societies and standards imposed by our charterers applicable to our business;

•

risks inherent in ship operation, including the risk of accidents, collisions and the discharge of pollutants;

•

our ability to retain key employees and the availability of skilled labour, ship crews and management;

•

potential disruption of shipping routes due to accidents, political events, piracy or acts by terrorists;

•

potential liability from future litigation;

•

any malfunction or disruption of information technology systems and networks that our operations rely on or any impact of a possible cybersecurity breach; and

•

other risks and uncertainties described in the Company's Annual Report on Form 20-F filed with the SEC on February 28, 2018 and available at http://www.sec.gov.

        We undertake no obligation to update or revise any forward-looking statements contained in this report, whether as a result of new information, future events, a change in our views or expectations or otherwise, except as required by applicable law. New factors emerge from time to time, and it is not possible for us to predict all of these factors. Further, we cannot assess the impact of each such factor on our business or the extent to which any factor, or combination of factors, may cause actual results to be materially different from those contained in any forward-looking statement.

        The declaration and payment of dividends are at all times subject to the discretion of our board of directors and will depend on, amongst other things, risks and uncertainties described above, restrictions in our credit facilities, the provisions of Bermuda law and such other factors as our board of directors may deem relevant.

Overview

        We are an international owner, operator and manager of LNG carriers. Our wholly owned fleet as of August 2, 2018 consists of 17 LNG carriers, including 12 ships in operation and five LNG carriers on order at Samsung Heavy Industries Co., Ltd. ("Samsung"). GasLog is also the general and controlling partner in GasLog Partners LP ("GasLog Partners" or the "Partnership"), a publicly traded master limited partnership, which owns 13 LNG carriers. In addition, GasLog has leased back under a bareboat charter one vessel sold to Lepta Shipping Co. Ltd. ("Lepta Shipping"), a subsidiary of Mitsui Co. Ltd. ("Mitsui") in February 2016, for a period of up to 20 years. GasLog has the option to repurchase the vessel on pre-agreed terms no earlier than the end of year ten and no later than the end of year 17 of the bareboat charter. We currently manage and operate 26 LNG carriers including 12 of our wholly owned ships in operation, 12 of the 13 ships contributed or sold to the Partnership (the other one is managed by a subsidiary of Royal Dutch Shell plc ("Shell")), the bareboat vessel and one LNG carrier owned by an entity in which we have a 25% interest. We are also supervising the construction of our newbuildings.

        GasLog has entered into a pool agreement (the "Pool Agreement") with Dynagas Ltd. ("Dynagas") and Golar LNG Ltd. ("Golar") establishing an LNG carrier pooling arrangement (the "Cool Pool") to market our and their vessels which are currently operating in the LNG shipping spot market. The Cool Pool allows the participating owners to optimize the operation of the pool vessels through improved scheduling ability, cost efficiencies and common marketing. The objective of the Cool Pool is to serve the transportation requirements of a rapidly growing LNG shipping market by providing customers with reliable, flexible and innovative solutions to meet their increasingly complex shipping requirements. For the operation of the Cool Pool, a Marshall Islands service company named "The Cool Pool Limited" was incorporated in September 2015 acting as an agent. As of June 30, 2018, the Cool Pool consisted of 17 modern efficient tri-fuel diesel electric ("TFDE") LNG carriers in the 155-177,000 cbm range. The Cool Pool charters the vessels for periods up to one year in duration as agents for the owners, who each remain responsible for the technical and commercial operation of their vessels and performance of the contracts. In June and July 2018, Dynagas Ltd. removed its three vessels from the Cool Pool.

20

        We also have a 25% interest in the Methane Nile Eagle, a 2007-built LNG carrier owned by Egypt LNG Shipping Ltd. ("Egypt LNG") and technically managed by us. It is currently operating under a 20-year time charter to a subsidiary of Shell.

        We generate revenues by chartering our ships to customers on multi-year charters and spot/short-term charters, and by providing technical ship management services, including crewing, training, maintenance, regulatory and classification compliance and health, safety, security and environmental ("HSSE") management and reporting through our wholly owned subsidiary GasLog LNG Services Ltd.

Recent Developments

Additional Vessel

        On May 30, 2018, GasLog confirmed the order of a 180,000 cbm GTT Mark III Flex LNG Carrier with LP-2S propulsion (Hull No. 2262) from Samsung that is scheduled to be delivered in the third quarter of 2020. The vessel will be chartered to Pioneer Shipping Limited, a wholly owned subsidiary of Centrica, for an initial period of seven years.

Completion of Dropdown of the GasLog Gibraltar

        On April 26, 2018, GasLog completed the sale of 100% of the ownership interest in GAS-fourteen Ltd., the entity which owns the GasLog Gibraltar, to GasLog Partners, for an aggregate purchase price of $207.0 million, which includes $1.0 million of positive net working capital. In connection with the sale, GasLog was issued $45.0 million of newly issued, privately placed common units (1,858,975 common units at a price of $24.21 per unit) of GasLog Partners as partial consideration.

Alexandroupolis Project Update

        During the quarter, Gastrade S.A ("Gastrade") and the stakeholders in the Alexandroupolis project continued their efforts to move the project towards Final Investment Decision ("FID"). The parties have finalized the majority of the terms under which both the Greek national gas utility DEPA and Bulgarian Energy Holding ("BEH") would take a shareholding in the project. Preparations have been ongoing during the quarter for the launch of a market test for potential users and the invitation to tender for various elements of the project, with both expected to commence in the near-term. Gastrade and its partners continue to target an end-2018 FID.

New Charter Agreements

        On June 18, 2018, GasLog Partners entered into a new time charter for the GasLog Sydney for 18 months with Cheniere Marketing International LLP, a wholly owned subsidiary of Cheniere Energy Inc. ("Cheniere") scheduled to commence between September and December 2018. The charterer has options to extend the charter for up to two consecutive periods of six months at escalating rates. The GasLog Sydney is a 155,000 cbm TFDE LNG carrier built in 2013 and currently on a multi-year time charter with a wholly owned subsidiary of Shell through September 2018. The vessel recently completed a scheduled dry-docking during which its future marketability was enhanced through the installation of a reliquefaction module.

        In addition, GasLog entered into an agreement with a major LNG producer for an approximately seven-month charter for the GasLog Houston, a 174,000 cbm low pressure, LP-2S propulsion, which commenced in June 2018 and ends on delivery of the vessel into her long-term charter with Shell in the beginning of 2018.

GasLog Partners' At-the-Market Common Units Equity Offering Programme (the "ATM Programme")

        On May 16, 2017, GasLog Partners commenced an ATM Programme under which the Partnership may, from time to time, raise equity through the issuance and sale of new common units having an aggregate offering price of up to $100.0 million in accordance with the terms of an equity distribution agreement entered into on the same date. Citigroup Global Markets Inc., Merrill Lynch, Pierce, Fenner & Smith Incorporated, Credit Suisse Securities (USA) LLC and Morgan Stanley & Co. LLC agreed to act as sales agents. On November 3, 2017, the size of the ATM Programme was increased to $144.0 million and UBS Securities LLC was included as a sales agent.

21

        Since the commencement of the ATM Programme through June 30, 2018, GasLog Partners has issued and received payment for a total of 2,738,425 common units, with cumulative gross proceeds of $62.9 million at a weighted average price of $22.97 per unit, representing a discount of 0.5% to the volume weighted average trading price of GasLog Partners' common units on the days on which new common units were issued. As of June 30, 2018, the cumulative net proceeds were $61.2 million.

        In the second quarter of 2018, GasLog Partners issued and received payment for an additional 1,020 common units at a weighted average price of $24.25 per common unit for total gross and net proceeds of $0.02 million.

Dividend Declaration

        On May 11, 2018, the board of directors declared a dividend on the Series A Preference Shares of $0.546875 per share, or $2.5 million in aggregate, payable on July 2, 2018 to holders of record as of June 29, 2018. GasLog paid the declared dividend to the transfer agent on June 28, 2018.

        On August 1, 2018, the board of directors declared a quarterly cash dividend of $0.15 per common share, or $12.1 million in the aggregate, payable on August 23, 2018 to shareholders of record as of August 13, 2018.

Fleet Update

Owned Fleet

        As of June 30, 2018, our wholly owned fleet consisted of the following vessels:

	Vessel Name	Year Built		Cargo Capacity (cbm)		Charterer	Propulsion	Charter Expiration(1)	Optional Period(2)
1	Methane Lydon Volney		2006		145,000	Shell	Steam	October 2020	2023-2025
2	GasLog Savannah		2010		155,000	Spot Market(3)	TFDE	—	—
3	GasLog Singapore		2010		155,000	Spot Market(3)	TFDE	—	—
4	GasLog Chelsea		2010		153,600	Spot Market(3)	TFDE	—	—
5	Methane Becki Anne		2010		170,000	Shell	TFDE	March 2024	2027-2029
6	GasLog Skagen(4)		2013		155,000	Shell	TFDE	August 2019	—
7	GasLog Saratoga(4)		2014		155,000	Spot Market(3)	TFDE	—	—
8	GasLog Salem		2015		155,000	Spot Market(3)	TFDE	—	—
9	GasLog Glasgow		2016		174,000	Shell	TFDE	June 2026	2031
10	GasLog Houston(5)		2018		174,000	New Customer Shell	LP-2S	January 2019 May 2028	— 2031-2034
11	GasLog Hong Kong		2018		174,000	Total(6)	LP-2S	December 2025	2028
12	GasLog Genoa		2018		174,000	Shell	LP-2S	April 2027	2030-2033

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        As of June 30, 2018, the Partnership's fleet consisted of the following vessels:

	Vessel Name	Year Built		Cargo Capacity (cbm)		Charterer	Propulsion	Charter Expiration(1)	Optional Period(2)
1	Methane Rita Andrea		2006		145,000	Shell	Steam	April 2020	—
2	Methane Jane Elizabeth		2006		145,000	Shell	Steam	October 2019	—
3	Methane Jane Elizabeth/ Methane Alison Victoria		2006/ 2007		145,000	New Customer	Steam	November/ December 2020(7)	2021-2024
	Methane Alison Victoria		2007		145,000	Shell	Steam	December 2019	—
4	Methane Shirley Elisabeth		2007		145,000	Shell	Steam	June 2020	2023-2025
5	Methane Heather Sally		2007		145,000	Shell	Steam	December 2020	2023-2025
6	GasLog Shanghai		2013		155,000	Spot Market(3)	TFDE	—	—
7	GasLog Santiago		2013		155,000	New Customer(8) New Customer(8)	TFDE	August 2018 December 2021/ January 2022	— 2022-2028
8	GasLog Sydney		2013		155,000	Shell Cheniere	TFDE	September 2018 March 2020	— 2020-2021
9	GasLog Seattle		2013		155,000	Shell	TFDE	December 2020	2025-2030
10	Solaris		2014		155,000	Shell	TFDE	June 2021	2026-2031
11	GasLog Greece		2016		174,000	Shell	TFDE	March 2026	2031
12	GasLog Geneva		2016		174,000	Shell	TFDE	September 2023	2028-2031
13	GasLog Gibraltar		2016		174,000	Shell	TFDE	October 2023	2028-2031

Bareboat Vessel

	Vessel Name	Year Built		Cargo Capacity (cbm)		Charterer	Propulsion	Charter Expiration(1)	Optional Period(2)
1	Methane Julia Louise(9)		2010		170,000	Shell	TFDE	March 2026	2029-2031

⁽¹⁾

Indicates the expiration of the initial term.

⁽²⁾

The period shown reflects the expiration of the minimum optional period and the maximum optional period. The charterer of the long-term charter of the GasLog Santiago may extend the term of this time charter for a period ranging from one to seven years, provided that the charterer provides us with advance notice of declaration. The charterer of the long-term charter of the GasLog Sydney may extend the term of this time charter for a period ranging from six to twelve months, provided that the charterer provides us with advance notice of declaration. The charterers of the GasLog Seattle and the Solaris have unilateral options to extend the term of the time charters for periods ranging from five to ten years, provided that the charterers provide us with advance notices of declaration of any option in accordance with the terms of the applicable charter. The charterers of the Methane Lydon Volney, the Methane Shirley Elisabeth, the Methane Heather Sally, the Methane Becki Anne and the Methane Julia Louise have unilateral options to extend the term of the related time charters for a period of either three or five years at their election, provided that the charterers provide us with advance notices of declaration of any option in accordance with the terms of the applicable charter. The charterer of the GasLog Greece and the GasLog Glasgow has the right to extend the charters for a period of five years at the charterer's option. The charterer of the GasLog Geneva and the GasLog Gibraltar has the right to extend the charter by two additional periods of five and three years, respectively, provided that the charterer provides us with advance notice of declaration. The charterer of the GasLog Houston and the GasLog Genoa has the right to extend the charter by two additional periods of three years, provided that the charterer provides us with advance notices of declaration. The charterer of the GasLog Hong Kong has the right to extend the charter for a period of three years, provided that the charterer provides us with advance notice of declaration.

⁽³⁾

Vessels currently operating in the spot market under the Cool Pool.

⁽⁴⁾

Shell and GasLog have agreed to substitute the GasLog Saratoga for the GasLog Skagen. The substitution will take effect towards the end of the GasLog Skagen's drydocking in the third quarter of 2018.

⁽⁵⁾

The vessel is currently on a short-term charter to a major LNG producer and thereafter will trade under her long-term charter party with a subsidiary of Shell, from the beginning of 2019 until April 2028.

⁽⁶⁾

"Total" refers to Total Gas & Power Chartering Limited, a wholly owned subsidiary of Total S.A.;

⁽⁷⁾

On March 22, 2018, a new charter party agreement was signed with a new customer for either the Methane Jane Elizabeth or the Methane Alison Victoria (as nominated by the Partnership) commencing in either November or December 2019, at the Partnership's option, until November or December 2020, with the charterer having the option to extend the charter from one to four years.

⁽⁸⁾

The vessel is currently on a short-term charter to a major LNG producer and thereafter will trade under a long-term contract with another customer.

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⁽⁹⁾

On February 24, 2016, GasLog's subsidiary, GAS-twenty six Ltd., completed the sale and leaseback of the Methane Julia Louise with Lepta Shipping. Lepta Shipping has the right to on-sell and lease back the vessel. The vessel was sold to Lepta Shipping for a total consideration approximately equivalent to its current book value. GasLog has leased back the vessel under a bareboat charter from Lepta Shipping for a period of up to 20 years. GasLog has the option to re-purchase the vessel on pre-agreed terms no earlier than the end of year ten and no later than the end of year 17 of the bareboat charter. The vessel remains on its eleven-year- charter with MSL, a subsidiary of Shell.

        Under the omnibus agreement entered into with GasLog Partners and certain of its subsidiaries in connection with the Partnership's initial public offering, as amended, GasLog Partners has the option to purchase from us: (i) the GasLog Glasgow within 36 months after we notify the Partnership's board of directors of the vessel's acceptance by their charterers and (ii) the GasLog Houston within 30 days after we notify the Partnership's board of directors of the vessel's commencement of her multi-year charter with Shell. In each case, GasLog Partners' option to purchase is at fair market value as determined pursuant to the omnibus agreement.

        GasLog Partners also has a right of first offer from us to purchase any other LNG carriers with cargo capacities greater than 75,000 cbm engaged in ongoing LNG transportation under charters of five full years or more that we own or acquire (the "Five Year Vessels") either at their acquisition cost plus certain break-up costs (in the case of a newly acquired Five-Year Vessel) or at their fair market value (in the case of a previously owned vessel that becomes a Five-Year Vessel). In addition, three of our five newbuildings (Hull Nos. 2131, 2213 and 2262) will each qualify as a Five-Year Vessel upon commencement of their charters and we will be required to offer to GasLog Partners an opportunity to purchase each vessel at fair market value within 30 days of the commencement of her charter. Generally, GasLog Partners must exercise this right of first offer within 30 days following the notice from us that the vessel has been acquired or has become a Five-Year Vessel.

Charter Expirations

        The GasLog Sydney, the Methane Jane Elizabeth, the Methane Alison Victoria and the Methane Rita Andrea are due to come off charter in September 2018, October 2019, December 2019 and April 2020, respectively, each plus or minus 30 days. GasLog Partners has already secured a one-year charter for either Methane Jane Elizabeth or Methane Alison Victoria (as nominated by the Partnership), commencing in either November or December 2019 at the Partnership's option. In addition, GasLog Partners has secured an 18-month charter for the GasLog Sydney, commencing between September and December 2018. GasLog Partners and GasLog continue to pursue opportunities for new multi-year charters with third parties and, on an interim basis, may consider trading the vessels in the spot market, pursuing the most advantageous redeployment depending on evolving market conditions.

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Results of Operations

Three-month period ended June 30, 2017 compared to the three-month period ended June 30, 2018

	For the three months ended
	June 30, 2017			June 30, 2018
Amounts in thousands of U.S. Dollars
Revenues		129,930			132,824
Net pool allocation		492			6,958
Voyage expenses and commissions		(3,319	)		(4,634	)
Vessel operating and supervision costs		(29,833	)		(32,703	)
Depreciation		(34,451	)		(38,813	)
General and administrative expenses		(10,246	)		(10,352	)
Profit from operations		52,573			53,280
Financial costs		(37,078	)		(42,000	)
Financial income		744			1,294
(Loss)/gain on derivatives		(9,720	)		1,167
Share of profit of associates		385			471
Total other expenses, net		(45,669	)		(39,068	)
Profit for the period		6,904			14,212
Non-controlling interests		(14,419	)		(17,832	)
Loss attributable to owners of the Group		(7,515	)		(3,620	)

        During the three-month period ended June 30, 2017, we had an average of 23.0 ships operating in our owned and bareboat fleet (including ships owned by the Partnership), having 2,081 operating days and an average of 23.7 ships operating under our technical management (including 22.0 of our owned and bareboat ships). During the three-month period ended June 30, 2018, we had an average of 25.0 ships operating in our owned and bareboat fleet (including ships owned by the Partnership), having 2,249 operating days and an average of 26.0 ships operating under our technical management (including 25.0 of our owned and bareboat ships).

Revenues:

        Revenues increased by 2.2%, or $2.9 million, from $129.9 million during the three-month period ended June 30, 2017 to $132.8 million during the three-month period ended June 30, 2018. The increase is attributable to an increase in revenues of $16.3 million due to the deliveries of the GasLog Houston, the GasLog Hong Kong and the GasLog Genoa (which were delivered on January 8, 2018, March 20, 2018 and March 29, 2018, respectively) in the six-month period ended June 30, 2018, which resulted in an increase in operating days. This increase was partially offset by a decrease of $5.8 million due to the off-hire days from the scheduled dry-dockings of the GasLog Santiago and the GasLog Sydney, a decrease of $4.5 million in earnings from our vessels operating in the spot market in both periods (before any Net Pool Allocation which is recorded in a separate Profit and Loss line below), a decrease of $2.3 million due to the expiration of the time charter of the GasLog Shanghai and her entering the spot market on May 18, 2018, and a further decrease of $0.7 million from the remaining fleet. The average daily hire rate decreased from $62,287 for the three-month period ended June 30, 2017 to $58,968 for the three-month period ended June 30, 2018. There was also a decrease of $0.1 million in revenues from technical management services mainly due to the termination of a project with another customer.

Net Pool Allocation:

        Net pool allocation increased by $6.5 million, from $0.5 million during the three-month period ended June 30, 2017 to $7.0 million during the three-month period ended June 30, 2018. The increase was attributable to the movement in the adjustment of the net pool results generated by the GasLog vessels in accordance with the pool distribution formula. GasLog recognized gross revenues and gross voyage expenses and commissions of $5.0 million and $2.2 million, respectively, from the operation of its vessels in the Cool Pool during the quarter ended June 30,

25

2018 (June 30, 2017: $8.0 million and $1.7 million, respectively). The increase in GasLog's total net pool performance was driven by higher spot rates and higher utilization achieved by all vessels trading in the Cool Pool. GasLog's total net pool performance is presented below:

	For the three months ended
	June 30, 2017			June 30, 2018
Amounts in thousands of U.S. Dollars
Pool gross revenues (included in Revenues)		8,023			5,047
Pool gross voyage expenses and commissions (included in Voyage expenses and commissions)		(1,682	)		(2,165	)
GasLog's adjustment for net pool allocation (included in Net pool allocation)		492			6,958
GasLog's Total net pool performance		6,833			9,840

Voyage Expenses and Commissions:

        Voyage expenses and commissions increased by 39.4%, or $1.3 million, from $3.3 million during the three-month period ended June 30, 2017 to $4.6 million during the three-month period ended June 30, 2018. The increase is primarily attributable to the increase of $0.5 million in voyage expenses of the vessels operating in the spot market, an increase of $0.5 million in bunkers consumed during off-hire and unchartered periods for the remaining vessels and an increase of $0.2 million in brokers' commissions.

Vessel Operating and Supervision Costs:

        Vessel operating and supervision costs increased by 9.7%, or $2.9 million, from $29.8 million during the three-month period ended June 30, 2017 to $32.7 million during the three-month period ended June 30, 2018. The increase was mainly attributable to the deliveries of the GasLog Houston, the GasLog Hong Kong and the GasLog Genoa operating in our fleet for the full second quarter in 2018 partially offset by one-off savings in certain crew expenses.

Depreciation:

        Depreciation increased by 12.5%, or $4.3 million, from $34.5 million during the three-month period ended June 30, 2017 to $38.8 million during the three-month period ended June 30, 2018. The increase in depreciation resulted mainly from the increase in the average number of vessels in our fleet in the three-month period ended June 30, 2018 compared to the same period in 2017.

General and Administrative Expenses:

        General and administrative expenses increased by 2.0%, or $0.2 million, from $10.2 million during the three-month period ended June 30, 2017 to $10.4 million during the three-month period ended June 30, 2018. The increase is mainly attributable to a total increase of $0.8 million in various expenses including employee costs, share-based compensation, travel expenses and foreign exchange differences, which were partially offset by a decrease of $0.6 million in legal and professional fees.

Financial Costs:

        Financial costs increased by 13.2%, or $4.9 million, from $37.1 million during the three-month period ended June 30, 2017 to $42.0 million during the three-month period ended June 30, 2018. The increase is attributable to an increase of $6.0 million in interest expense on loans, bonds and cash flow hedges, an increase of $0.2 million in amortization of deferred loan fees and an increase of $0.3 million in other financial costs, partially offset by a decrease of $1.5 million in loss arising on bond repurchases and a decrease of $0.1 million in finance lease charges. During the three-month period ended June 30, 2018, we had an average of $2,986.6 million of outstanding indebtedness, with a weighted average interest rate of 4.7%, while during the three-month period ended June 30, 2017, we had an average of $2,793.2 million of outstanding indebtedness having an aggregate weighted average interest rate of 4.2%. These weighted average interest rates include interest expense on loans and cash flow hedges and interest expense on senior unsecured notes and cross-currency swaps ("CCS").

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(Loss)/Gain on Derivatives:

        Gain on derivatives increased by $10.9 million, from a loss of $9.7 million during the three-month period ended June 30, 2017 to a gain of $1.2 million during the three-month period ended June 30, 2018. The increase in gain on derivatives is primarily attributable to a decrease of $4.4 million in recycled loss that was reclassified from equity to the statement of profit or loss relating to the cumulative loss that was reclassified from equity to the statement of profit or loss from the CCS agreements terminations in June 2017, an increase of $3.6 million in gain from mark-to-market valuation of our derivative financial instruments carried at fair value through profit or loss, which reflected a gain of $0.1 million for the quarter ended June 30, 2018 as compared to a loss of $3.5 million for the quarter ended June 30, 2017, and a decrease of $3.2 million in realized loss from derivative financial instruments held for trading, which were partially offset by an increase of $0.3 million in the ineffective portion of cash flow hedges.

Profit for the Period:

        Profit for the period increased by $7.3 million, from a profit of $6.9 million for the three-month period ended June 30, 2017 to a profit of $14.2 million for the three-month period ended June 30, 2018, as a result of the aforementioned factors.

Loss Attributable to Owners of the Group:

        Loss attributable to owners of the Group decreased by $3.9 million, from a loss of $7.5 million for the three-month period ended June 30, 2017 to a loss of $3.6 million for the three-month period ended June 30, 2018. The decrease in loss attributable to the owners of GasLog resulted mainly from the increase in profit mentioned above, partially offset by the increase in profit attributable to the non-controlling interests (non-controlling unitholders of GasLog Partners) as a result of GasLog Partners' ATM Programme implemented in May 2017, the preference unit issuances in May 2017 and January 2018, and the associated sales of the GasLog Greece, the GasLog Geneva, the Solaris and the GasLog Gibraltar on May 3, 2017, July 3, 2017, October 20, 2017 and April 26, 2018, respectively.

Six-month period ended June 30, 2017 compared to the six-month period ended June 30, 2018

	For the six months ended
	June 30, 2017			June 30, 2018
Amounts in thousands of U.S. Dollars
Revenues		258,215			271,302
Net pool allocation		1,320			15,611
Voyage expenses and commissions		(6,191	)		(9,915	)
Vessel operating and supervision costs		(57,322	)		(67,016	)
Depreciation		(68,159	)		(74,342	)
General and administrative expenses		(20,225	)		(22,365	)
Profit from operations		107,638			113,275
Financial costs		(69,602	)		(78,597	)
Financial income		1,135			2,310
(Loss)/gain on derivatives		(9,722	)		18,938
Share of profit of associates		847			827
Total other expenses, net		(77,342	)		(56,522	)
Profit for the period		30,296			56,753
Non-controlling interests		(29,059	)		(41,069	)
Profit attributable to owners of the Group		1,237			15,684

        During the six-month period ended June 30, 2017, we had an average of 23.0 ships operating in our owned and bareboat fleet (including ships owned by the Partnership), having 4,151 operating days and an average of 23.9 ships operating under our technical management (including 22.0 of our owned and bareboat ships). During the

27

six-month period ended June 30, 2018, we had an average of 25.0 ships operating in our owned and bareboat fleet (including ships owned by the Partnership), having 4,411 operating days and an average of 25.0 ships operating under our technical management (including 24.0 of our owned and bareboat ships).

Revenues:

        Revenues increased by 5.1%, or $13.1 million, from $258.2 million during the six-month period ended June 30, 2017 to $271.3 million during the six-month period ended June 30, 2018. The increase is attributable to an increase in revenues of $21.0 million due to the deliveries of the GasLog Houston, the GasLog Hong Kong and the GasLog Genoa (which were delivered on January 8, 2018, March 20, 2018 and March 29, 2018, respectively) in the six-month period ended June 30, 2018, which resulted in an increase in operating days. There was also an increase of $1.6 million in earnings from our vessels operating in the spot market in both periods (before any Net Pool Allocation which is recorded in a separate Profit and Loss line below). These increases were partially offset by a decrease of $6.0 million due to the off-hire days from the scheduled dry-dockings of the GasLog Santiago and the GasLog Sydney, a decrease of $2.3 million due to the expiration of the time charter of the GasLog Shanghai and her entering the spot market on May 18, 2018 and a further decrease of $1.1 million from the remaining fleet. The average daily hire rate decreased from $62,075 for the six-month period ended June 30, 2017 to $61,419 for the six-month period ended June 30, 2018. There was also a decrease of $0.1 million in revenues from technical management services mainly due to the termination of a project with another customer.

Net Pool Allocation:

        Net pool allocation increased by $14.3 million, from $1.3 million during the six-month period ended June 30, 2017 to $15.6 million during the six-month period ended June 30, 2018. The increase was attributable to the movement in the adjustment of the net pool results generated by the GasLog vessels in accordance with the pool distribution formula. GasLog recognized gross revenues and gross voyage expenses and commissions of $18.5 million and $5.7 million, respectively, from the operation of its vessels in the Cool Pool during the quarter ended June 30, 2018 (June 30, 2017: $15.4 million and $3.1 million, respectively). The increase in GasLog's total net pool performance was driven by higher spot rates and higher utilization achieved by all vessels trading in the Cool Pool. GasLog's total net pool performance is presented below:

	For the six months ended
	June 30, 2017			June 30, 2018
Amounts in thousands of U.S. Dollars
Pool gross revenues (included in Revenues)		15,378			18,452
Pool gross voyage expenses and commissions (included in Voyage expenses and commissions)		(3,062	)		(5,703	)
GasLog's adjustment for net pool allocation (included in Net pool allocation)		1,320			15,611
GasLog's Total net pool performance		13,636			28,360

Voyage Expenses and Commissions:

        Voyage expenses and commissions increased by 59.7%, or $3.7 million, from $6.2 million during the six-month period ended June 30, 2017 to $9.9 million during the six-month period ended June 30, 2018. The increase is primarily attributable to the increase in voyage expenses of the vessels operating in the spot market of $2.6 million, an increase of $0.8 million in bunkers consumed during off-hire and unchartered periods for the remaining vessels and an increase of $0.3 million in brokers' commissions.

Vessel Operating and Supervision Costs:

        Vessel operating and supervision costs increased by 16.9%, or $9.7 million, from $57.3 million during the six-month period ended June 30, 2017 to $67.0 million during the six-month period ended June 30, 2018. The increase is mainly attributable to the deliveries of the GasLog Houston, the GasLog Hong Kong and the GasLog Genoa during the first quarter of 2018, increased scheduled technical maintenance costs related to engine maintenance, intermediate surveys, costs related to performed dry-dockings and an increase due to the unfavorable movement of the USD against the Euro ("EUR") (we have entered into forward foreign exchange contracts to

28

economically hedge part of this exposure and the associated realized gains are recorded in (Loss)/gain of derivatives, which is discussed below).

Depreciation:

        Depreciation increased by 8.9%, or $6.1 million, from $68.2 million during the six-month period ended June 30, 2017 to $74.3 million during the six-month period ended June 30, 2018. The increase in depreciation resulted mainly from the increase in the average number of vessels in our fleet in the six-month period ended June 30, 2018 compared to the same period of 2017.

General and Administrative Expenses:

        General and administrative expenses increased by 10.9%, or $2.2 million, from $20.2 million during the six-month period ended June 30, 2017 to $22.4 million during the six-month period ended June 30, 2018. The increase is mainly attributable to an increase of $1.6 million in employee costs due to the unfavorable movement of the USD against the EUR and the British Pound ("GBP") (we have entered into forward foreign exchange contracts to economically hedge part of this exposure and the associated realized gains are recorded in (Loss)/gain of derivatives, which is discussed below) and an increase of $0.6 million in various other expenses.

Financial Costs:

        Financial costs increased by 12.9%, or $9.0 million, from $69.6 million during the six-month period ended June 30, 2017 to $78.6 million during the six-month period ended June 30, 2018. The increase is attributable to an increase of $10.6 million in interest expense on loans, bonds and cash flow hedges and $0.3 million in other financial costs, partially offset by a decrease of $1.5 million in losses arising on bond repurchase, a decrease of $0.3 million in amortization of deferred loan fees mainly driven by a decrease in write-offs of unamortized loan fees and a decrease of $0.1 million in finance lease charges. During the six-month period ended June 30, 2018, we had an average of $2,858.1 million of outstanding indebtedness, with a weighted average interest rate of 4.6%, while during the six-month period ended June 30, 2017, we had an average of $2,764.7 million of outstanding indebtedness having an aggregate weighted average interest rate of 4.0%. These weighted average interest rates include interest expense on loans and cash flow hedges and interest expense on senior unsecured notes and cross-currency swaps ("CCS").

(Loss)/gain on Derivatives:

        Gain on derivatives increased by $28.6 million, from a loss of $9.7 million during the six-month period ended June 30, 2017 to a gain of $18.9 million during the six-month period ended June 30, 2018. The increase in gain is mainly attributable to an increase of $18.4 million in gain from mark-to-market valuation of our derivative financial instruments carried at fair value through profit or loss, which reflected a loss of $1.2 million for the six-month period ended June 30, 2018, as compared to a gain of $17.2 million for the six-month period ended June 30, 2017, an increase of $4.8 million in realized gain from interest rate swaps held for trading, a decrease of $4.4 million in recycled loss of cash flow hedges reclassified to profit or loss and an increase of $1.6 million in realized gain on forward foreign exchange contracts held for trading, partially offset by an increase of $0.5 million in the ineffective portion of cash flow hedges.

Profit for the Period:

        Profit for the period increased by $26.5 million, from a profit of $30.3 million for the six-month period ended June 30, 2017 to a profit of $56.8 million for the six-month period ended June 30, 2018, as a result of the aforementioned factors.

Profit Attributable to Owners of the Group:

        Profit attributable to owners of the Group increased by $14.5 million, from a profit of $1.2 million for the six-month period ended June 30, 2017 to a profit of $15.7 million for the six-month period ended June 30, 2018. The increase in profit attributable to the owners of GasLog resulted mainly from the increase in profit mentioned above, partially offset by the increase in profit attributable to the non-controlling interests (non-controlling unitholders of GasLog Partners) as a result of GasLog Partners' ATM Programme implemented in May 2017, the

29

preference unit issuances in May 2017 and January 2018, and the associated sales of the GasLog Greece, the GasLog Geneva, the Solaris and the GasLog Gibraltar on May 3, 2017, July 3, 2017, October 20, 2017 and April 26, 2018, respectively.

Customers

        For the six-month period ended June 30, 2018, we received 88.1% of our revenues from Shell, 6.8% of our revenues from various charterers in the spot/short-term market, 5.0% of our revenues from major LNG producers and 0.1% of our revenues from Egypt LNG, an entity in which we have a 25% ownership interest. For the six-month period ended June 30, 2017, we received 93.8% of our revenues from Shell, 6.0% of our revenues from various charterers in the spot/short-term market and 0.2% of our revenues from Egypt LNG.

Liquidity and Capital Resources

        Our primary liquidity needs are to fund our operating and other expenses, to finance the purchase and construction of our newbuildings and conversions, to purchase secondhand vessels, to service our existing debt and to pay dividends. In monitoring our working capital needs, we project our charter hire income and the vessels' maintenance and running expenses, as well as debt service obligations, and seek to maintain adequate cash reserves in order to address revenue shortfalls or budget overruns, if any.

        We anticipate that our primary sources of funds will be available cash, cash from operations and borrowings under existing and new debt agreements. We may also seek to raise additional common or other forms of equity, subject in each case to market conditions. We believe that these sources of funds will be sufficient to meet our liquidity needs, although there can be no assurance that we will be able to obtain future debt and equity financing on terms acceptable to us.

        Our funding and treasury activities are intended to meet our operating and financing requirements while maintaining appropriate liquidity. Cash and cash equivalents are held primarily in U.S. dollars.

        As of June 30, 2018, GasLog had $314.4 million of cash and cash equivalents, of which $189.2 million was held in time deposits and the remaining balance in current accounts. Moreover, as of June 30, 2018, GasLog had $26.0 million held in time deposits with an initial duration of more than three months but less than a year that have been classified as short-term investments and $2.3 million in restricted cash, which consisted of guarantees held for vessels with respect to the enhancement of their operational performance.

        As of June 30, 2018, GasLog had an aggregate of $2.9 billion of indebtedness outstanding under its credit facilities and bond agreements, of which $182.6 million was repayable within one year, and a $209.8 million finance lease liability related to the sale and leaseback of the Methane Julia Louise, of which $6.5 million was repayable within one year.

        As of June 30, 2018, there was undrawn available capacity of $100.0 million under the revolving credit facility of the credit agreement of up to $1.1 billion entered into on July 19, 2016 (the "Legacy Facility Refinancing").

        As of June 30, 2018, the total remaining balance of the contract prices of the five LNG carriers on order was $875.9 million which GasLog expects to be funded with the $165.8 million undrawn capacity under the financing agreement entered into on October 16, 2015, as well as cash balances, cash from operations and borrowings under new debt agreements.

        During the second quarter, GasLog terminated, extended or signed new swap agreements maintaining the total notional amount as of June 30, 2018 at $1.2 billion. GasLog has hedged 46.2% of its expected floating interest rate exposure on its outstanding debt (excluding the finance lease liability) as of June 30, 2018.

        Our credit facilities are described in Note 13 of our annual audited consolidated financial statements included in our Annual Report on Form 20-F filed with the SEC on February 28, 2018 and Note 7 of our unaudited condensed consolidated financial statements included elsewhere in this report.

30

Working Capital Position

        As of June 30, 2018, GasLog's current assets totaled $389.6 million, while current liabilities totaled $324.7 million, resulting in a positive working capital position of $64.9 million.

        Taking into account generally expected market conditions, we anticipate that available cash and cash flow generated from operations will be sufficient to fund our operations, including our working capital requirements, and to make all other required principal and interest payments on our indebtedness during the next 12 months.

Cash Flows

Six-month period ended June 30, 2017 compared to the six-month period ended June 30, 2018

        The following table summarizes our net cash flows from operating, investing and financing activities for the periods indicated:

	For the six months ended
	June 30, 2017			June 30, 2018
Amounts in thousands of U.S. Dollars
Net cash provided by operating activities		104,115			126,802
Net cash used in investing activities		(66,726	)		(614,626	)
Net cash provided by financing activities		149,377			418,164

Net Cash Provided by Operating Activities

        Net cash provided by operating activities increased by $22.7 million, from $104.1 million during the six-month period ended June 30, 2017 to $126.8 million during the six-month period ended June 30, 2018. The increase was mainly attributable to an increase of $14.3 million in net pool allocation, an increase of $13.1 million in revenues, a decrease of $4.8 in realized losses on interest rate swaps held for trading, an increase of $3.6 million caused by movements in working capital accounts, an increase of $1.6 million in realized gain on forward foreign exchange contracts held for trading and a net increase of the remaining movements of $0.8 million, partially offset by an increase of $9.7 million in vessel operating and supervision costs, an increase of $3.7 million in voyage expenses and commissions and an increase of $2.1 million in general and administrative expenses.

Net Cash Used in Investing Activities

        Net cash used in investing activities increased by $547.9 million, from $66.7 million in the six-month period ended June 30, 2017 to $614.6 million in the six-month period ended June 30, 2018. The increase is mainly attributable to an increase of $525.9 million in payments for the construction costs of newbuildings and other fixed assets, a net increase of $34.0 million in short-term investments and an increase of $2.3 million in restricted cash. The above movements were partially offset by a decrease of $13.9 million in payments made for the investment in Gastrade and an increase of $1.0 million in financial income received.

Net Cash Provided by Financing Activities

        Net cash provided by financing activities increased by $268.8 million, from $149.4 million in the six-month period ended June 30, 2017 to $418.2 million in the six-month period ended June 30, 2018. The increase is mainly attributable to an increase of $218.2 million in proceeds from our borrowings, a decrease of $167.2 million in bank loan and bond repayments and a decrease of $20.6 million from payments for cross currency swaps termination. The above movements were partially offset by a decrease of $87.8 million in GasLog Partners' common unit offerings, a decrease of $27.7 million in proceeds from the issuance of the Partnership's Series A Preference Units as compared to the Partnership's Series B Preference Units, an increase of $18.2 million in dividend payments and an increase of $3.6 million in payments for finance lease liabilities.

31

Contracted Charter Revenues and Days from Time Charters

        The following table summarizes GasLog's (including the vessels contributed or sold to GasLog Partners) contracted charter revenues and vessel utilization as of June 30, 2018.

	Contracted Charter Revenues and Days from Time Charters
	On and after July 1,			For the years ending December 31,
	2018			2019			2020			2021			2022			2023-2029			Total
	(in millions of U.S. dollars, except days and percentages)
Contracted time charter revenues(1)		263.5			548.8			469.2			374.3			351.7			1,158.5			3,165.9
Total contracted days(1)		3,584			7,473			6,402			4,806			4,380			14,487			41,132
Total available days(2)		4,714			9,858			10,636			11,135			11,315			77,977			125,635
Total unfixed days(3)		1,130			2,385			4,234			6,329			6,935			63,490			84,503
Percentage of total contracted days/total available days		76.0	%		75.8	%		60.2	%		43.2	%		38.7	%		18.6	%		32.7	%

⁽¹⁾

Reflects time charter revenues and contracted days for seven of our currently wholly owned ships, the 13 ships currently owned by the Partnership, the bareboat vessel and two of our five newbuildings on order for which we have secured time charters. Does not include charter revenues for the vessels operating in the spot/short-term market under the Cool Pool agreement and the Methane Nile Eagle, in which we hold a 25% minority interest. Contracted revenue calculations assume: (a) 365 revenue days per annum, with 30 off-hire days when the ship undergoes scheduled dry-docking (every five years). We have also assumed ten additional off-hire days for the enhancement of one vessel; (b) all LNG carriers on order are delivered on schedule; and (c) no exercise of any option to extend the terms of charters. Revenue calculations for such charters include an estimate of the amount of the operating cost component and the management fee component.

⁽²⁾

Available days represent total calendar days after deducting 30 off-hire days when the ship undergoes scheduled dry-docking. We have also assumed ten additional off-hire days for the enhancement of one vessel. The available days for the vessels operating in the spot/short-term market are included.

⁽³⁾

Represents available days for ships after the expiration of existing charters (assuming charterers do not exercise any option to extend the terms of charters) and the available days for the vessels operating in the spot/short-term market.

        Other than the assumptions reflected in the footnotes to the table, including our assumption that our newbuildings are delivered on schedule, the table does not reflect events occurring after June 30, 2018. The table reflects only our contracted charter revenues for the ships in our owned fleet and bareboat fleet for which we have secured time charters, and it does not reflect the costs or expenses we will incur in fulfilling our obligations under the charters, nor does it include other revenues we may earn, such as revenues for technical management of customer-owned ships. In particular, the table does not reflect any revenues from the six vessels that are operating in the Cool Pool, any additional ships we may acquire in the future, nor does it reflect the options under our time charters that permit our charterers to extend the time charter terms for successive multi-year periods. The entry into time charter contracts for the six vessels that are operating in the Cool Pool and any additional ships we may acquire, or the exercise of options extending the terms of our existing charters, would result in an increase in the number of contracted days and the contracted revenue for our fleet in the future. Although the contracted charter revenues are based on contracted charter hire rate provisions, they reflect certain assumptions, including assumptions relating to future ship operating costs. We consider the assumptions to be reasonable as of the date of this report, but if these assumptions prove to be incorrect, our actual time charter revenues could differ from those reflected in the table. Furthermore, any contract is subject to various risks, including performance by the counterparties or an early termination of the contract pursuant to its terms. If the charterers are unable or unwilling to make charter payments to us, or if we agree to renegotiate charter terms at the request of a charterer or if contracts are prematurely terminated for any reason, we would be exposed to prevailing market conditions at the time and our results of operations and financial condition may be materially adversely affected. Please see the disclosure under the heading "Risk Factors" in our Annual Report on Form 20-F filed with the SEC on February 28, 2018. For these reasons, the contracted charter revenue information presented above is not fact and should not be relied upon as being necessarily indicative of future results and readers are cautioned not to place

32

undue reliance on this information. Neither the Company's independent auditors, nor any other independent accountants, have compiled, examined or performed any procedures with respect to the information presented in the table, nor have they expressed any opinion or any other form of assurance on such information or its achievability and assume no responsibility for, and disclaim any association with, the information in the table.

Significant Accounting Policies

        For a description of all of our significant accounting policies, see Note 2 of our annual audited consolidated financial statements included in our Annual Report on Form 20-F filed on February 28, 2018 and Note 2 of our unaudited condensed consolidated financial statements included elsewhere in this report.

33

GASLOG LTD.
INDEX TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

	Page
Unaudited condensed consolidated statements of financial position as of December 31, 2017 and June 30, 2018	F-2
Unaudited condensed consolidated statements of profit or loss for the three and six months ended June 30, 2017 and 2018	F-3
Unaudited condensed consolidated statements of comprehensive income or loss for the three and six months ended June 30, 2017 and 2018	F-4
Unaudited condensed consolidated statements of changes in equity for the six months ended June 30, 2017 and 2018	F-5
Unaudited condensed consolidated statements of cash flows for the six months ended June 30, 2017 and 2018	F-6
Notes to the unaudited condensed consolidated financial statements	F-7

F-1

GasLog Ltd. and its Subsidiaries

Unaudited condensed consolidated statements of financial position
As of December 31, 2017 and June 30, 2018
(Amounts expressed in thousands of U.S. Dollars)

	Note	December 31, 2017			June 30, 2018
Assets
Non-current assets
Goodwill			9,511			9,511
Investment in associates	4		20,800			20,489
Deferred financing costs			17,519			4,134
Other non-current assets			428			1,820
Derivative financial instruments	14		16,012			31,440
Tangible fixed assets	5		3,772,566			4,378,295
Vessels under construction	5		166,655			89,956
Vessel held under finance lease	5		214,329			210,646
Total non-current assets			4,217,820			4,746,291
Current assets
Trade and other receivables			10,706			18,817
Dividends receivable and other amounts due from related parties	8		8,666			8,075
Derivative financial instruments	14		2,199			6,206
Inventories			6,839			9,722
Prepayments and other current assets			4,569			4,132
Short-term investments			—			26,000
Restricted cash			—			2,321
Cash and cash equivalents			384,092			314,369
Total current assets			417,071			389,642
Total assets			4,634,891			5,135,933
Equity and liabilities
Equity
Preference shares	12		46			46
Share capital	12		810			810
Contributed surplus	12		911,766			883,314
Reserves			18,347			18,890
Treasury shares	12		(6,960	)		(4,472	)
(Accumulated deficit)/ retained earnings			(5,980	)		9,894
Equity attributable to owners of the Group			918,029			908,482
Non-controlling interests			845,105			954,587
Total equity			1,763,134			1,863,069
Current liabilities
Trade accounts payable			11,526			12,098
Ship management creditors			2,394			1,847
Amounts due to related parties	8		35			72
Derivative financial instruments	14		1,815			1,109
Other payables and accruals	11		93,418			120,565
Borrowings, current portion	7		179,367			182,556
Finance lease liability, current portion	6		6,302			6,485
Total current liabilities			294,857			324,732
Non-current liabilities
Derivative financial instruments	14		—			1,149
Borrowings, non-current portion	7		2,368,189			2,742,255
Finance lease liability, non-current portion	6		207,126			203,355
Other non-current liabilities			1,585			1,373
Total non-current liabilities			2,576,900			2,948,132
Total equity and liabilities			4,634,891			5,135,933

The accompanying notes are an integral part of these unaudited condensed consolidated financial statements.

F-2

GasLog Ltd. and its Subsidiaries

Unaudited condensed consolidated statements of profit or loss
For the three and six months ended June 30, 2017 and 2018
(Amounts expressed in thousands of U.S. Dollars, except per share data)

		For the three months ended						For the six months ended
	Note	June 30, 2017			June 30, 2018			June 30, 2017			June 30, 2018
Revenues	9		129,930			132,824			258,215			271,302
Net pool allocation			492			6,958			1,320			15,611
Voyage expenses and commissions			(3,319	)		(4,634	)		(6,191	)		(9,915	)
Vessel operating and supervision costs			(29,833	)		(32,703	)		(57,322	)		(67,016	)
Depreciation	5		(34,451	)		(38,813	)		(68,159	)		(74,342	)
General and administrative expenses	10		(10,246	)		(10,352	)		(20,225	)		(22,365	)
Profit from operations			52,573			53,280			107,638			113,275
Financial costs	15		(37,078	)		(42,000	)		(69,602	)		(78,597	)
Financial income			744			1,294			1,135			2,310
(Loss)/gain on derivatives	15		(9,720	)		1,167			(9,722	)		18,938
Share of profit of associates	4		385			471			847			827
Total other expenses, net			(45,669	)		(39,068	)		(77,342	)		(56,522	)
Profit for the period			6,904			14,212			30,296			56,753
Attributable to:
Owners of the Group			(7,515	)		(3,620	)		1,237			15,684
Non-controlling interests			14,419			17,832			29,059			41,069
			6,904			14,212			30,296			56,753
(Loss)/earnings per share – basic and diluted	18		(0.12	)		(0.08	)		(0.05	)		0.13

The accompanying notes are an integral part of these unaudited condensed consolidated financial statements.

F-3

GasLog Ltd. and its Subsidiaries

Unaudited condensed consolidated statements of comprehensive income or loss
For the three and six months ended June 30, 2017 and 2018
(Amounts expressed in thousands of U.S. Dollars)

		For the three months ended						For the six months ended
	Note	June 30, 2017			June 30, 2018			June 30, 2017		June 30, 2018
Profit for the period			6,904			14,212			30,296		56,753
Other comprehensive income/(loss):
Items that may be reclassified subsequently to profit or loss:
Effective portion of changes in fair value of cash flow hedges, net of amounts recycled to profit or loss	14		763			(296	)		719		1,210
Recycled loss of cash flow hedges reclassified to profit or loss			4,368			—			4,368		—
Other comprehensive income/(loss) for the period			5,131			(296	)		5,087		1,210
Total comprehensive income for the period			12,035			13,916			35,383		57,963
Attributable to:
Owners of the Group			(2,384	)		(3,916	)		6,324		16,894
Non-controlling interests			14,419			17,832			29,059		41,069
			12,035			13,916			35,383		57,963

The accompanying notes are an integral part of these unaudited condensed consolidated financial statements.

F-4

GasLog Ltd. and its Subsidiaries

Unaudited condensed consolidated statements of changes in equity
For the six months ended June 30, 2017 and 2018
(Amounts expressed in thousands of U.S. Dollars)

	Share capital (Note 12)		Preference shares (Note 12)		Contributed surplus (Note 12)			Reserves			Treasury shares (Note 12)			(Accumulated deficit)/ retained earnings			Attributable to owners of the Group			Non- controlling interests			Total
Balance as of January 1, 2017		810		46		966,974			10,160			(10,861	)		(21,486	)		945,643			564,039			1,509,682
Net proceeds from GasLog Partners' public offering		—		—		—			—			—			—			—			225,776			225,776
Dividend declared (common and preference shares)		—		—		(27,597	)		—			—			—			(27,597	)		(27,938	)		(55,535	)
Share-based compensation, net of accrued dividend		—		—		—			2,023			—			—			2,023			—			2,023
Settlement of share-based compensation		—		—		—			(1,771	)		1,664			—			(107	)		—			(107	)
Profit for the period		—		—		—			—			—			1,237			1,237			29,059			30,296
Other comprehensive income for the period		—		—		—			5,087			—			—			5,087			—			5,087
Total comprehensive income for the period		—		—		—			5,087			—			1,237			6,324			29,059			35,383
Balance as of June 30, 2017		810		46		939,377			15,499			(9,197	)		(20,249	)		926,286			790,936			1,717,222
Balance as of December 31, 2017		810		46		911,766			18,347			(6,960	)		(5,980	)		918,029			845,105			1,763,134
Opening adjustment(1)		—		—		—			(436	)		—			190			(246	)		—			(246	)
Balance as of January 1, 2018		810		46		911,766			17,911			(6,960	)		(5,790	)		917,783			845,105			1,762,888
Net proceeds from GasLog Partners' public offerings (Note 3)		—		—		—			—			—			—			—			111,184			111,184
Dividend declared (common and preference shares) (Note 12)		—		—		(28,452	)		—			—			—			(28,452	)		(42,771	)		(71,223	)
Share-based compensation, net of accrued dividend (Note 17)		—		—		—			2,233			—			—			2,233			—			2,233
Settlement of share-based compensation		—		—		—			(2,464	)		2,550			—			86			—			86
Treasury shares, net		—		—		—			—			(62	)		—			(62	)		—			(62	)
Profit for the period		—		—		—			—			—			15,684			15,684			41,069			56,753
Other comprehensive income for the period		—		—		—			1,210			—			—			1,210			—			1,210
Total comprehensive income for the period		—		—		—			1,210			—			15,684			16,894			41,069			57,963
Balance as of June 30, 2018		810		46		883,314			18,890			(4,472	)		9,894			908,482			954,587			1,863,069

⁽¹⁾

Adjusted so as to reflect certain amendments introduced due to the adoption of IFRS 15 Revenue from Contracts with Customers and IFRS 9 Financial Instruments, which became effective on January 1, 2018 (Note 2).

The accompanying notes are an integral part of these unaudited condensed consolidated financial statements.

F-5

GasLog Ltd. and its Subsidiaries

Unaudited condensed consolidated statements of cash flows
For the six months ended June 30, 2017 and 2018
(Amounts expressed in thousands of U.S. Dollars)

	For the six months ended
	June 30, 2017			June 30, 2018
Cash flows from operating activities:
Profit for the period		30,296			56,753
Adjustments for:
Depreciation		68,159			74,342
Share of profit of associates		(847	)		(827	)
Financial income		(1,135	)		(2,310	)
Financial costs		69,602			78,597
Unrealized foreign exchange (gain)/loss on cash and cash equivalents		(538	)		63
Unrealized loss/(gain) on derivative financial instruments held for trading, including ineffective portion of cash flow hedges (Note 15)		1,172			(16,705	)
Recycled loss of cash flow hedges reclassified to profit or loss		4,368			—
Share-based compensation (Note 17)		2,235			2,515
		173,312			192,428
Movements in working capital		(5,344	)		(1,712	)
Cash provided by operations		167,968			190,716
Interest paid		(63,853	)		(63,914	)
Net cash provided by operating activities		104,115			126,802
Cash flows from investing activities:
Payments for tangible fixed assets, vessels under construction and vessel held under finance leaze		(63,010	)		(588,929	)
Dividends received from associate		1,043			500
Return of contributed capital from associate		59			—
Other investments		(13,944	)		—
Purchase of short-term investments		(20,000	)		(36,000	)
Maturity of short-term investments		28,000			10,000
Restricted cash		—			(2,321	)
Financial income received		1,126			2,124
Net cash used in investing activities		(66,726	)		(614,626	)
Cash flows from financing activities:
Proceeds from bank loans and bonds		280,000			498,225
Bank loans and bonds repayments		(276,158	)		(108,958	)
Payment of loan issuance costs		(6,234	)		(7,295	)
Proceeds from GasLog Partners' public common unit offerings (net of underwriting discounts and commissions)		87,840			24
Proceeds from GasLog Partners' preference unit offering (net of underwriting discounts and commissions)		139,222			111,544
Payment of equity raising costs		(336	)		(660	)
Payment for NOK bond repurchase at a premium		(1,459	)		—
Payment for cross currency swaps' termination		(20,603	)		—
Purchase of treasury shares		—			(62	)
Proceeds from stock options' exercise		137			157
Dividends paid		(53,019	)		(71,223	)
Payments for finance lease liability		(13	)		(3,588	)
Net cash provided by financing activities		149,377			418,164
Effects of exchange rate changes on cash and cash equivalents		538			(63	)
Increase/(decrease) in cash and cash equivalents		187,304			(69,723	)
Cash and cash equivalents, beginning of the period		227,024			384,092
Cash and cash equivalents, end of the period		414,328			314,369
Non-cash investing and financing activities
Capital expenditures – net payable at the end of the period		4,805			15,426
Equity raising costs included in liabilities at the end of the period		955			88
Loan issuance costs included in liabilities at the end of the period		57			79
Dividend declared included in liabilities at the end of the period		2,516			—

The accompanying notes are an integral part of these unaudited condensed consolidated financial statements.

F-6

GasLog Ltd. and its Subsidiaries

Notes to the unaudited condensed consolidated financial statements
For the six months ended June 30, 2017 and 2018
(Amounts expressed in thousands of U.S. Dollars, except share and per share data)

1. Organization and Operations

        GasLog Ltd. ("GasLog") was incorporated in Bermuda on July 16, 2003. GasLog and its subsidiaries (the "Group") are primarily engaged in the ownership, operation and management of vessels in the liquefied natural gas ("LNG") market, providing maritime services for the transportation of LNG on a worldwide basis and LNG vessel management services. The Group conducts its operations through its vessel-owning subsidiaries and through its vessel management services subsidiary. The Group's operations are carried out from offices in Piraeus, London, New York, Singapore and Monaco. The registered office of GasLog is Clarendon House, 2 Church Street, Hamilton HM 11, Bermuda. GasLog's chairman, Peter G. Livanos, is GasLog's largest shareholder through his ownership of Ceres Shipping Ltd. ("Ceres Shipping"), which controls Blenheim Holdings Ltd. As of June 30, 2018, entities controlled by members of the Livanos family, including GasLog's chairman, are deemed to beneficially own approximately 40.11% of GasLog's issued and outstanding common shares. As a result of his ownership of GasLog's common shares, Mr. Livanos can effectively control the outcome of most matters on which GasLog's shareholders are entitled to vote.

        As of June 30, 2018, GasLog held a 29.1% interest (including the 2% interest through general partner units) in GasLog Partners LP ("GasLog Partners" or the "Partnership") and, as a result of its ownership of the general partner, and the fact that the general partner elects the majority of the Partnership's directors in accordance with the Partnership Agreement, GasLog has the ability to control the Partnership's affairs and policies. Consequently, GasLog Partners is consolidated in the Group's financial statements.

        The accompanying unaudited condensed consolidated financial statements include the financial statements of GasLog and its subsidiaries. Unless indicated otherwise, the subsidiaries listed below are 100% held (either directly or indirectly) by GasLog. As of June 30, 2018, the Group's structure is as follows:

Name	Place of incorporation	Date of incorporation	Principal activities	Cargo capacity (cbm)	Vessel	Delivery date
Subsidiaries:
GasLog Investments Ltd.	BVI	July 2003	Holding company	—	—	—
GasLog Carriers Ltd. ("GasLog Carriers")	Bermuda	February 2008	Holding company	—	—	—
GasLog Shipping Company Ltd.	Bermuda	January 2006	Holding company	—	—	—
GasLog Partners GP LLC	Marshall Islands	January 2014	Holding company	—	—	—
GasLog Cyprus Investments Ltd.	Cyprus	December 2016	Holding company	—	—	—
GasLog Services UK Ltd.	England and Wales	May 2014	Service company	—	—	—
GasLog Services US Inc.	Delaware	May 2014	Service company	—	—	—
GasLog Asia Pte Ltd.	Singapore	May 2015	Service company	—	—	—
GasLog LNG Services Ltd.	Bermuda	August 2004	Vessel management services	—	—	—
GasLog Monaco S.A.M.	Monaco	February 2010	Service company	—	—	—
GAS-one Ltd.	Bermuda	February 2008	Vessel-owning company	155,000	GasLog Savannah	May 2010
GAS-two Ltd.	Bermuda	February 2008	Vessel-owning company	155,000	GasLog Singapore	July 2010
GAS-six Ltd.	Bermuda	February 2011	Vessel-owning company	155,000	GasLog Skagen	July 2013
GAS-nine Ltd.	Bermuda	June 2011	Vessel-owning company	155,000	GasLog Saratoga	December 2014
GAS-ten Ltd.	Bermuda	June 2011	Vessel-owning company	155,000	GasLog Salem	April 2015
GAS-twelve Ltd.	Bermuda	December 2012	Vessel-owning company	174,000	GasLog Glasgow	June 2016
GAS-fifteen Ltd.	Bermuda	August 2013	Vessel-owning company	153,600	GasLog Chelsea	October 2013
GAS-eighteen Ltd.	Bermuda	January 2014	Vessel-owning company	145,000	Methane Lydon Volney	April 2014
GAS-twenty two Ltd.	Bermuda	May 2014	Vessel-owning company	174,000	GasLog Genoa	March 2018
GAS-twenty three Ltd.	Bermuda	May 2014	Vessel-owning company	174,000	Hull No. 2131	Q1 2019(1)
GAS-twenty four Ltd.	Bermuda	June 2014	Vessel-owning company	174,000	GasLog Houston	January 2018
GAS-twenty five Ltd.	Bermuda	June 2014	Vessel-owning company	174,000	GasLog Hong Kong	March 2018
GAS-twenty six Ltd.	Bermuda	January 2015	Finance lease asset company(2)	170,000	Methane Julia Louise	March 2015
GAS-twenty seven Ltd.	Bermuda	January 2015	Vessel-owning company	170,000	Methane Becki Anne	March 2015
GAS-twenty eight Ltd.	Bermuda	September 2016	Vessel-owning company	180,000	Hull No. 2213(4)	Q2 2020(1)
GAS-twenty nine Ltd.	Bermuda	September 2016	Vessel-owning company	180,000	Hull No. 2212	Q3 2019(1)
GAS-thirty Ltd.	Bermuda	December 2017	Vessel-owning company	180,000	Hull No. 2262	Q3 2020(1)
GAS-thirty one Ltd.	Bermuda	December 2017	Vessel-owning company	180,000	Hull No. 2274	Q2 2020(1)
GAS-thirty two Ltd.	Bermuda	December 2017	Dormant	—	—	—
GAS-thirty three Ltd.	Bermuda	May 2018	Dormant	—	—	—

F-7

Name	Place of incorporation	Date of incorporation	Principal activities	Cargo capacity (cbm)	Vessel	Delivery date
GAS-thirty four Ltd.	Bermuda	May 2018	Dormant	—	—	—
GasLog Shipping Limited	BVI	July 2003	Dormant	—	—	—
29.1% interest subsidiaries:
GasLog Partners LP	Marshall Islands	January 2014	Holding company	—	—	—
GasLog Partners Holdings LLC	Marshall Islands	April 2014	Holding company	—	—	—
GAS-three Ltd.	Bermuda	April 2010	Vessel-owning company	155,000	GasLog Shanghai	January 2013
GAS-four Ltd.	Bermuda	April 2010	Vessel-owning company	155,000	GasLog Santiago	March 2013
GAS-five Ltd.	Bermuda	February 2011	Vessel-owning company	155,000	GasLog Sydney	May 2013
GAS-seven Ltd.	Bermuda	March 2011	Vessel-owning company	155,000	GasLog Seattle	December 2013
GAS-eight Ltd.	Bermuda	March 2011	Vessel-owning company	155,000	Solaris	June 2014
GAS-eleven Ltd.	Bermuda	December 2012	Vessel-owning company	174,000	GasLog Greece	March 2016
GAS-thirteen Ltd.	Bermuda	July 2013	Vessel-owning company	174,000	GasLog Geneva	September 2016
GAS-fourteen Ltd.	Bermuda	July 2013	Vessel-owning company	174,000	GasLog Gibraltar	October 2016
GAS-sixteen Ltd.	Bermuda	January 2014	Vessel-owning company	145,000	Methane Rita Andrea	April 2014
GAS-seventeen Ltd.	Bermuda	January 2014	Vessel-owning company	145,000	Methane Jane Elizabeth	April 2014
GAS-nineteen Ltd.	Bermuda	April 2014	Vessel-owning company	145,000	Methane Alison Victoria	June 2014
GAS-twenty Ltd.	Bermuda	April 2014	Vessel-owning company	145,000	Methane Shirley Elisabeth	June 2014
GAS-twenty one Ltd.	Bermuda	April 2014	Vessel-owning company	145,000	Methane Heather Sally	June 2014
25% interest associate:
Egypt LNG Shipping Ltd.	Bermuda	May 2010	Vessel-owning company	145,000	Methane Nile Eagle	December 2007
20% interest associate:
Gastrade S.A. ("Gastrade")	Greece	June 2010	Service company	—	—	—
33.33% joint venture:
The Cool Pool Limited (the "Cool Pool")(3)	Marshall Islands	September 2015	Service company	—	—	—

⁽¹⁾

For newbuildings, expected delivery quarters as of June 30, 2018 are presented.

⁽²⁾

On February 24, 2016, GAS-twenty six Ltd. completed the sale and leaseback of the Methane Julia Louise with a subsidiary of Mitsui Co. Ltd. ("Mitsui"). Refer to Note 6.

⁽³⁾

On October 1, 2015, GasLog Carriers, Dynagas Ltd. ("Dynagas") and Golar LNG Limited ("Golar") ("Pool Owners") and The Cool Pool Limited signed a LNG carrier pooling agreement (the "LNG Carrier Pool" or "Pool Agreement") to market their vessels, which are currently operating in the LNG shipping spot market.

As of June 30, 2018, the LNG Carrier Pool—named the "Cool Pool"—consists of 17 modern, high quality and essentially equivalent vessels powered by fuel efficient tri-fuel diesel electric ("TFDE") propulsion technology. The participation of the Pool Owners' vessels in the Cool Pool is as follows: Dynagas: one vessel; GasLog: six vessels; and Golar: ten vessels. Each vessel owner continues to be fully responsible for the staffing and technical management of their respective vessels. For the operation of the Cool Pool, a Marshall Islands service company named "The Cool Pool Limited" or the "Pool Manager", was incorporated in September 2015 acting as an agent. In June and July 2018, Dynagas Ltd. removed its three vessels from the Cool Pool.

⁽⁴⁾

On January 12, 2018, GasLog entered into a shipbuilding contract with Samsung Heavy Industries Co. Ltd ("Samsung") for the construction of a 180,000 cbm GTT Mark III Flex LNG Carrier with LP-2S propulsion (Hull No. 2213) that is scheduled to be delivered in the second quarter of 2020. This vessel will be the vessel to be chartered to Centrica for an initial period of approximately seven years. The 180,000 cbm GTT Mark III Flex Plus LNG Carrier with LP-2S propulsion (Hull No. 2212) to be delivered in the third quarter of 2019 is currently without charter.

2. Basis of Presentation

        These unaudited condensed consolidated financial statements have been prepared in accordance with International Accounting Standard ("IAS") 34 Interim Financial Reporting as issued by the International Accounting Standards Board ("IASB"). Certain information and footnote disclosures required by International Financial Reporting Standards ("IFRS") for a complete set of annual financial statements have been omitted, and, therefore, these unaudited condensed consolidated financial statements should be read in conjunction with the Group's annual consolidated financial statements as of and for the year ended December 31, 2017 filed with the SEC on February 28, 2018. On August 1, 2018 GasLog's board of directors authorized the unaudited condensed consolidated financial statements for issuance.

        The critical accounting judgments and key sources of estimation uncertainty were disclosed in the Company's annual consolidated financial statements for the year ended December 31, 2017 and remain unchanged.

        The unaudited condensed consolidated financial statements are expressed in U.S. dollars ("USD"), which is the functional currency of all of the subsidiaries in the Group because their vessels operate in international shipping markets in which revenues and expenses are primarily settled in USD, and the Group's most significant assets and liabilities are paid for and settled in USD.

        The financial statements are prepared on the historical cost basis, except for the revaluation of derivative financial instruments. The same accounting policies and methods of computation have been followed in these unaudited condensed consolidated financial statements as were applied in the preparation of the Group's financial

F-8

statements for the year ended December 31, 2017, except for the changes resulting from the adoption of IFRS 9 Financial Instruments and IFRS 15 Revenue from Contracts with Customers (as discussed below).

        Management anticipates that the Group's primary sources of funds will be available cash, cash from operations and borrowings under existing and new loan agreements. The Group may also seek to raise additional common or other forms of equity. Management believes that these sources of funds will be sufficient for the Group to meet its liquidity needs and comply with its financial covenants for at least twelve months from the end of the reporting period and therefore it is appropriate to prepare the financial statements on a going concern basis.

Adoption of new and revised IFRS

(a) Standards and interpretations adopted in the current period

        In May 2014, the IASB issued IFRS 15 Revenue from Contracts with Customers which applies to all contracts with customers: the main exceptions are leases, financial instruments and insurance contracts. IFRS 15 specifies how and when an IFRS reporter will recognize revenue as well as requiring such entities to provide users of financial statements with more informative, relevant disclosures. The standard supersedes IAS 18 Revenue, IAS 11 Construction Contracts and a number of revenue-related interpretations. The standard was effective for annual periods beginning on or after January 1, 2018 and was applied by the Group using the modified retrospective approach. The adoption of the standard as of January 1, 2018 resulted in an increase of $246 on the Group's Accumulated deficit and an increase of the same amount on the Group's Other payables and accruals under the modified retrospective approach, as a result of the reassessment of the timing of the performance obligations in relation to positioning and repositioning fees and associated expenses.

        The Group assessed that under a time charter arrangement, the hire rate per the charter agreement has two components: the lease component and the service component relating to the vessel operating costs. The revenue in relation to the lease component of the agreements is accounted for under the leases standard. The revenue in relation to the service component relates to vessel operating expenses which include expenses that are paid by the vessel owner such as management fees, crew wages, provisions and stores, technical maintenance and insurance expenses. These costs are essential to operating a charter and the charterers receive the benefit of these when the vessel is used during the contracted time and, therefore, these costs will be accounted for in accordance with the requirements of IFRS 15 Revenue from Contracts with Customers.

        In relation to short-term charters under the Cool Pool, management believes mobilization of a vessel from a previous port of discharge to a subsequent port of loading does not result in a separate benefit for charterers and that the activity is thus incapable of being distinct. This activity is considered to be a required set-up activity to fulfil the contract. On that basis, it was concluded that positioning and repositioning fees and associated expenses should be recognized over the period of the contract, and not at a certain point in time.

        In July 2014, the IASB issued the complete version of IFRS 9 Financial Instruments. IFRS 9 specifies how an entity should classify and measure financial assets and financial liabilities. The new standard requires all financial assets to be subsequently measured at amortized cost or fair value depending on the business model of the legal entity in relation to the management of the financial assets and the contractual cash flows of the financial assets. The standard also requires a financial liability to be classified as either at fair value through profit or loss or at amortized cost. In addition, a new hedge accounting model was introduced, that is designed to be more closely aligned with how entities undertake risk management activities when hedging financial and non-financial risk exposures.

        When an entity first applies IFRS 9 Financial Instruments, it may choose as its accounting policy to continue to apply the hedge accounting requirements of IAS 39 Financial Instruments, Recognition and Measurement, instead of the requirements in Chapter 6 of IFRS 9 Financial Instruments. An entity shall apply that policy to all of its hedging relationships. The Group has selected to apply hedge accounting under IFRS 9 Financial Instruments.

        The Group has elected to take the transition relief as provided by IFRS 9.7.2.15 which permits an entity not to restate prior periods on initial application of IFRS 9 Financial Instruments and any adjustments to be made in the current year. The adoption of this standard as of January 1, 2018 resulted in a decrease of $436 on the Group's Accumulated deficit and an equal decrease on the Group's Reserves, as a result of the change in the

F-9

accounting for the currency basis element of the cross-currency swaps ("CCS") to flow directly to the statement of profit or loss.

(b) Standards and amendments in issue not yet adopted

        At the date of authorization of these unaudited condensed consolidated financial statements, the following standards and amendments relevant to the Group were in issue but not yet effective:

        In January 2016, the IASB issued IFRS 16 Leases, which sets out the principles for the recognition, measurement, presentation and disclosure of leases for both parties to a contract, i.e., the customer ("lessee") and the supplier ("lessor"). IFRS 16 eliminates the classification of leases by lessees as either operating leases or finance leases and, instead, introduces a single lessee accounting model. Applying that model, a lessee is required to recognise: (a) assets and liabilities for all leases with a term of more than 12 months, unless the underlying asset is of low value; and (b) depreciation of lease assets separately from interest on lease liabilities in the statement of profit or loss. Lessors continue to classify their leases as operating leases or finance leases, and to account for those two types of leases differently. IFRS 16 supersedes the previous leases Standard, IAS 17 Leases, and related Interpretations. The standard is effective from January 1, 2019, with early adoption permitted only with concurrent adoption of IFRS 15 Revenue from Contracts with Customers. Management has elected not to adopt early, and it anticipates that the implementation of this standard will not have a material impact on the Group's consolidated financial statements, since the changes for lessors are fairly minor and the Group's lessee obligations are not significant.

        The impact of all other IFRS standards and amendments issued but not yet adopted is not expected to be material on the Group's unaudited condensed consolidated financial statements.

3. Non-controlling Interest in GasLog Partners

        On January 17, 2018, GasLog Partners completed a public offering of 4,600,000 8.200% Series B Cumulative Redeemable Perpetual Fixed to Floating Rate Preference Units (the "Partnership's Series B Preference Units"), including 600,000 units issued upon the exercise in full by the underwriters of their option to purchase additional Partnership's Series B Preference Units, at a price to the public of $25.00 per preference unit. The net proceeds from the offering, after deducting underwriting discounts, commissions and other offering expenses, were $111,194. The Partnership's Series B Preference Units are listed on the New York Stock Exchange under the symbol "GLOP PR B".

        The profit allocation to non-controlling interests is based on the distribution policy for available cash stated in the Partnership Agreement and is illustrated in the table below:

	Marginal Percentage Interest in Distributions
	Total Quarterly Distribution Target Amount	Unitholders	General Partner	Holders of IDRs
Minimum Quarterly Distribution	$0.375	98.0%	2.0%	0%
First Target Distribution	$0.375 up to $0.43125	98.0%	2.0%	0%
Second Target Distribution	$0.43125 up to $0.46875	85.0%	2.0%	13.0%
Third Target Distribution	$0.46875 up to $0.5625	75.0%	2.0%	23.0%
Thereafter	Above $0.5625	50.0%	2.0%	48.0%

F-10

	For the three months ended		For the six months ended
Allocation of GasLog Partners' profit(*)	June 30, 2017	June 30, 2018	June 30, 2017	June 30, 2018
Partnership's profit attributable to:
Common unitholders	17,349	17,095	32,073	41,152
Subordinated unitholders	N/A	N/A	5,085	N/A
General partner	357	349	777	888
Incentive distribution rights ("IDRs")	103	—	896	2,368
Paid and accrued preference equity distributions	1,549	5,457	1,549	10,495
Total	19,358	22,901	40,380	54,903
Partnership's profit allocated to GasLog	4,939	5,069	11,321	13,834
Partnership's profit allocated to non-controlling interests	14,419	17,832	29,059	41,069
Total	19,358	22,901	40,380	54,903

*

Excludes profits of GAS-eleven Ltd., GAS-thirteen Ltd., GAS-eight Ltd. and GAS-fourteen Ltd. for the period prior to their transfers to the Partnership on May 3, 2017, July 3, 2017, October 20, 2017 and April 26, 2018, respectively.

4. Investment in Associates

        The movements in investment in associates are reported in the following table:

	June 30, 2018
As of January 1, 2018	20,800
Share of profit of associates	827
Dividend declared	(1,138	)
As of June 30, 2018	20,489

        On February 9, 2017, GasLog acquired a 20% shareholding in Gastrade, a private limited company licensed to develop an independent natural gas system offshore Alexandroupolis in Northern Greece utilizing a floating storage and regasification unit ("FSRU") along with other fixed infrastructure. GasLog, as well as being a shareholder, will provide operations and maintenance ("O&M") services for the FSRU through an O&M agreement which was signed on February 23, 2018.

F-11

5. Tangible Fixed Assets, Vessels Under Construction and Vessel Held Under Finance Lease

        The movements in tangible fixed assets, vessels under construction and vessel held under finance lease are reported in the following table:

	Vessels			Office property and other tangible assets		Total tangible fixed assets			Vessels under construction			Vessel held under finance lease
Cost
As of January 1, 2018		4,217,866			19,224		4,237,090			166,655			228,523
Additions		33,225			3,758		36,983			564,211			145
Transfer from vessels under construction		639,260			—		639,260			(639,260	)		—
Transfer under "Other non-current assets"		—			—		—			(1,650	)		—
Fully amortized fixed assets		(5,000	)		—		(5,000	)		—			—
As of June 30, 2018		4,885,351			22,982		4,908,333			89,956			228,668
Accumulated depreciation
As of January 1, 2018		460,815			3,709		464,524			—			14,194
Depreciation expense		70,104			410		70,514			—			3,828
Fully amortized fixed assets		(5,000	)		—		(5,000	)		—			—
As of June 30, 2018		525,919			4,119		530,038			—			18,022
Net book value
As of December 31, 2017		3,757,051			15,515		3,772,566			166,655			214,329
As of June 30, 2018		4,359,432			18,863		4,378,295			89,956			210,646

        Vessels with an aggregate carrying amount of $4,359,432 as of June 30, 2018 (December 31, 2017: $3,757,051) have been pledged as collateral under the terms of the Group's loan agreements.

        In May 2014, GAS-twenty two Ltd. entered into a shipbuilding contract with Samsung for the construction of an LNG carrier (174,000 cubic meters). The vessel (GasLog Genoa) was delivered on March 29, 2018.

        In June 2014, GAS-twenty four Ltd. and GAS-twenty five Ltd. entered into shipbuilding contracts with Hyundai Heavy Industries Co., Ltd. ("Hyundai") for the construction of two LNG carriers (174,000 cubic meters each). The first vessel, the GasLog Houston, was delivered on January 8, 2018, while the second vessel, the GasLog Hong Kong, was delivered on March 20, 2018.

Vessels under construction

        In May 2014, GAS-twenty three Ltd. entered into a shipbuilding contract with Samsung for the construction of an LNG carrier (174,000 cubic meters). The vessel is expected to be delivered in the first quarter of 2019.

        In September 2016, GAS-twenty nine Ltd. entered into a shipbuilding contract with Samsung for the construction of one LNG carrier (180,000 cubic meters). The vessel is expected to be delivered in the third quarter of 2019.

        On March 21, 2017, GasLog entered into a Heads of Agreement ("HOA") with Samsung for the engineering in relation to the potential FSRU conversion of an existing vessel of the Group. As of June 30, 2018, $3,400 of the cost was paid, in accordance with the payment terms.

        On July 10, 2017, GasLog entered into an agreement with Keppel Shipyard Limited ("Keppel") for the detailed engineering in relation to an FSRU conversion of one vessel. As of June 30, 2018, $4,265 of the cost was paid, in accordance with the payment terms.

F-12

        In January 2018, GAS-twenty eight Ltd. entered into a shipbuilding contract with Samsung for the construction of one LNG carrier (180,000 cubic meters). The vessel is expected to be delivered in the second quarter of 2020.

        In March 2018, GAS-thirty one Ltd. entered into a shipbuilding contract with Samsung for the construction of one LNG carrier (180,000 cubic meters). The vessel is expected to be delivered in the second quarter of 2020.

        In May 2018, GAS-thirty Ltd. entered into a shipbuilding contract with Samsung for the construction of one LNG carrier (180,000 cubic meters). The vessel is expected to be delivered in the third quarter of 2020.

        Vessels under construction represent scheduled advance payments to the shipyards as well as certain capitalized expenditures. As of June 30, 2018, the Group has paid to the shipyard $85,000 for the vessels that are under construction and expects to pay the remaining installments as they come due upon each vessel's keel laying, launching and delivery (Note 13).

        The vessels under construction costs as of December 31, 2017 and June 30, 2018 are as follows:

	December 31, 2017	June 30, 2018
Progress shipyard installments	153,116	85,023
Onsite supervision costs	10,570	4,260
Critical spare parts, equipment and other vessel delivery expenses	2,969	673
Total	166,655	89,956

6. Sale and Leaseback

        An analysis of the finance lease liabilities is as follows:

	December 31, 2017	June 30, 2018
Finance lease liability, current portion	6,302	6,485
Finance lease liability, non-current portion	207,126	203,355
Total	213,428	209,840

7. Borrowings

        An analysis of the borrowings is as follows:

	December 31, 2017		June 30, 2018
Amounts due within one year	188,167		193,709
Less: unamortized deferred loan/bond issuance costs	(8,800	)	(11,153	)
Borrowings, current portion	179,367		182,556
Amounts due after one year	2,399,849		2,784,651
Less: unamortized deferred loan/bond issuance costs	(31,660	)	(42,396	)
Borrowings, non-current portion	2,368,189		2,742,255
Total	2,547,556		2,924,811

Bank Loans

        The main terms of the Group's loan facilities in existence as of December 31, 2017 have been disclosed in Note 13 "Borrowings" of the annual audited consolidated financial statements for the year ended December 31, 2017. During the six months ended June 30, 2018, the Group, through GasLog Partners, prepaid in full the $29,750 of the outstanding debt of GAS-nineteen Ltd., GAS-twenty Ltd. and GAS-twenty one Ltd., which would have been originally due in April 2018.

F-13

        The carrying amount of the Group's bank debt recognized in the unaudited condensed consolidated financial statements approximates its fair value after adjusting for the unamortized loan/bond issuance costs.

Bonds

        The main terms of the Group's senior unsecured NOK bonds maturing in 2021 (the "NOK 2021 Bonds") have been disclosed in the annual audited consolidated financial statements for the year ended December 31, 2017. Refer to Note 13 "Borrowings".

        The carrying amount under the NOK 2021 Bonds, net of unamortized financing costs, as of June 30, 2018 is $90,964 (December 31, 2017: $89,723, aggregate carrying amount under the NOK 2021 Bonds) while their aggregate fair value is $97,832 based on a USD/NOK exchange rate of 0.1228 as of June 30, 2018 (December 31, 2017: $97,416, based on a USD/NOK exchange rate of 0.1213).

        The Group was in compliance with its financial covenants as of June 30, 2018.

8. Related Party Transactions

        The Group has the following balances with related parties which have been included in the unaudited condensed consolidated statements of financial position:

Current Assets

Dividends receivable and other amounts due from related parties

	December 31, 2017		June 30, 2018
Dividends receivable from associate		125		763
Due from The Cool Pool Limited		8,186		6,997
Other receivables		355		315
Total		8,666		8,075

Current Liabilities

Amounts due to related parties

	December 31, 2017		June 30, 2018
Ship management creditors		993		450
Amounts due to related parties		35		72

        Ship management creditors' liability is comprised of cash collected from Egypt LNG Shipping Ltd. to cover the obligations of its vessel under the Group's management.

        Amounts due to related parties of $72 as of June 30, 2018 (December 31, 2017: $35) are expenses paid by a related party on behalf of the Group and payables to other related parties for the office lease and other operating expenses.

F-14

9. Revenues from Contracts with Customers

        The Group has recognized the following amounts relating to revenues:

	For the three months ended				For the six months ended
	June 30, 2017		June 30, 2018		June 30, 2017		June 30, 2018
Revenues from time charters		121,581		127,573		242,283		252,467
Revenues from The Cool Pool Limited (GasLog vessels)		8,023		5,047		15,378		18,452
Revenues from vessel management services		326		204		554		383
Total		129,930		132,824		258,215		271,302

        Revenues from The Cool Pool Limited relate to revenues received from GasLog's vessels operating in the Cool Pool and do not include the net pool allocation to GasLog of $6,958 and $15,611 for the three and six months ended June 30, 2018, respectively ($492 and $1,320 for the three and six months ended June 30, 2017, respectively).

10. General and Administrative Expenses

        An analysis of general and administrative expenses is as follows:

	For the three months ended					For the six months ended
	June 30, 2017			June 30, 2018		June 30, 2017			June 30, 2018
Employee costs		4,403			4,677		9,614			11,628
Board of directors' fees		542			622		1,103			1,344
Share-based compensation		1,223			1,329		2,235			2,515
Rent and utilities		541			570		1,144			1,086
Travel and accommodation		555			701		1,050			1,033
Legal and professional fees		2,393			1,704		3,955			3,326
Foreign exchange differences, net		(84	)		63		(39	)		(241	)
Other expenses		673			686		1,163			1,674
Total		10,246			10,352		20,225			22,365

11. Other Payables and Accruals

        An analysis of other payables and accruals is as follows:

	December 31, 2017		June 30, 2018
Social contributions		1,244		797
Unearned revenue		34,926		41,089
Accrued legal and professional fees		1,567		994
Accrued board of directors' fees		577		622
Accrued employee costs		5,494		5,156
Accrued off-hire		5,284		7,926
Accrued crew costs		4,027		3,898
Accrued purchases		4,227		17,289
Accrued financing costs		1,984		36
Accrued interest		27,851		34,681
Accrued payable to charterers		4,179		5,859
Other accruals		2,058		2,218
Total		93,418		120,565

F-15

12. Share Capital and Preference Shares

        GasLog's authorized share capital consists of 500,000,000 shares with a par value of $0.01 per share.

        As of June 30, 2018, the share capital consisted of 80,814,081 issued and outstanding common shares, par value $0.01 per share, 179,045 treasury shares issued and held by GasLog and 4,600,000 preference shares issued and outstanding. The movements in the number of shares, the share capital, the preference shares, the contributed surplus and the treasury shares are reported in the following table:

	Number of Shares								Amounts
	Number of Common Shares			Number of Treasury Shares			Number of Preference Shares		Share capital		Preference Shares		Contributed surplus			Treasury Shares
Outstanding as of January 1, 2018		80,717,885			275,241			4,600,000		810		46		911,766			(6,960	)
Treasury shares, net		(2,818	)		2,818			—		—		—		—			(62	)
Treasury shares distributed for awards vested or exercised in the period		99,014			(99,014	)		—		—		—		—			2,550
Dividends declared deducted from Contributed surplus due to accumulated deficit		—			—			—		—		—		(28,452	)		—
Outstanding as of June 30, 2018		80,814,081			179,045			4,600,000		810		46		883,314			(4,472	)

        The treasury shares were acquired by GasLog in 2014 and 2018 in relation to the share-based compensation (Note 17).

Dividend distribution

        On February 15, 2018, the board of directors declared a quarterly cash dividend of $0.14 per common share, which was paid on March 15, 2018 to shareholders of record as of March 5, 2018 for a total amount of $11,300.

        On March 8, 2018, the board of directors declared a dividend on the Series A Preference Shares of $0.546875 per share, or $2,516 in aggregate, payable on April 2, 2018 to holders of record as of March 29, 2018. GasLog paid the declared dividend to the transfer agent on March 29, 2018.

        On May 3, 2018, the board of directors declared a quarterly cash dividend of $0.15 per common share, which was paid on May 24, 2018 to shareholders of record as of May 14, 2018 for a total amount of $12,120.

        On May 11, 2018, the board of directors declared a dividend on the Series A Preference Shares of $0.546875 per share, or $2,516 in aggregate, payable on July 2, 2018 to holders of record as of June 29, 2018. GasLog paid the declared dividend to the transfer agent on June 28, 2018.

13. Commitments and Contingencies

(a)

As of June 30, 2018, the Group had the following commitments as lessee relating to buildings under operating leases:

Period	June 30, 2018
Not later than one year		1,185
Later than one year and not later than three years		1,382
Later than three years and not later than five years		565
Total		3,132

F-16

(b)

Commitments relating to the vessels under construction (Note 5) as of June 30, 2018 payable to Samsung were as follows:

Period	June 30, 2018
Not later than one year		255,568
Later than one year and not later than three years		620,310
Total		875,878

        Also, pursuant to a Heads of Agreement entered into by GAS-twenty two Ltd. and GAS-twenty three Ltd. with Methane Services Limited ("MSL"), a subsidiary of Shell, on March 8, 2016, the GasLog entities declared their options with Samsung to install reliquefaction plants on board the vessels. MSL agreed to reimburse 50% of such cost per vessel, resulting in an aggregate commitment to pay $3,200 per vessel to GasLog after the installation has been completed. In the event the reliquefaction plants do not meet certain specified performance criteria during operation, GasLog will have an obligation to pay to MSL a daily compensation amount per vessel, which obligation will in whole or in part be satisfied by certain obligations of the manufacturers incurred for failure to meet the specified performance criteria. The amount of $3,200 relating to GAS-twenty two Ltd. was included in Trade and other receivables since the reliquefaction plant installation has been completed.

(c)

Future gross minimum lease payments receivable in relation to non-cancellable time charter agreements for vessels in operation, including a vessel under a finance lease (Note 6), as of June 30, 2018 are as follows (30 off-hire days are assumed when each vessel will undergo scheduled dry-docking and ten additional days per vessel after the dry-docking for the vessel enhancements mentioned further below; in addition, early delivery of the vessels by the charterers or any exercise of the charterers' options to extend the terms of the charters are not accounted for):

Period	June 30, 2018
Not later than one year		411,409
Later than one year and not later than three years		639,397
Later than three years and not later than five years		425,591
More than five years		499,041
Total		1,975,438

        Future gross minimum lease payments disclosed in the above table excludes the lease payments of the vessels that are under construction.

(d)

In April and May 2017, GasLog LNG Services Ltd. entered into agreements in relation to some of the Group's vessels, with the aim of enhancing their operational performance. Commitments relating to these agreements, without including additional estimated costs for which no agreement had been signed as of June 30, 2018, are as follows:

Period	June 30, 2018
Not later than one year		11,142
Total		11,142

(e)

Related to the acquisition of six vessels from a subsidiary of MSL in 2014 and another two vessels in 2015, the Group is committed to purchase depot spares from MSL with an aggregate value of $8,000 of which depot spares with value of $660 have been purchased and paid as of June 30, 2018 and are included in Tangible fixed assets (Note 5). The remaining spares are expected to be acquired before the end of the initial term of the charter party agreements.

(f)

On November 2, 2015, a letter agreement between GasLog and MSL was signed reimbursing MSL the sum of $2,654 for value as of November 1, 2015, adjusted for future value through January 2020 up to $3,801, allowing for the future use of the reimbursement amount against the funding of specific MSL projects, such as

F-17

costs associated with change orders on LNG newbuildings and or modifications of existing vessels as agreed between the parties. As of June 30, 2018, the outstanding commitment is $1,349.

(g)

On October 11, 2016, GasLog LNG Services Ltd. entered into an agreement whereby it has access to all long lead items ("LLIs") necessary for the conversion of a GasLog LNG carrier vessel into an FSRU whereby such conversion work would be undertaken by Keppel. GasLog is only obligated to pay for such LLIs if utilized for a GasLog vessel conversion or, if the same have not been utilized in a GasLog vessel conversion within three years from November 2016, the items may be put to GasLog at 110% of the original cost, or GasLog may call for the purchase of such LLIs at a discounted price of 85% of the original cost.

(h)

On July 10, 2017, GasLog entered into an agreement with Keppel for the detailed engineering in relation to an FSRU conversion of one vessel. Commitment relating to this agreement as of June 30, 2018 is as follows:

Period	June 30, 2018
Not later than one year		3,787
Total		3,787

(i)

In September 27, 2017 (and in addition to the seven existing maintenance agreements signed in 2014 in relation to GasLog vessels), GasLog LNG Services Ltd. entered into further maintenance agreements with Wartsila Greece S.A. ("Wartsila") in respect of eight GasLog LNG carriers. The agreements cover the renewal of existing maintenance agreements on four GasLog vessels and extend the servicing to four additional LNG carriers. The agreements ensure dynamic maintenance planning, technical support, security of spare parts supply, specialist technical personnel and performance monitoring.

        Various claims, suits and complaints, including those involving government regulations, arise in the ordinary course of the shipping business. In addition, losses may arise from disputes with charterers, environmental claims, agents and insurers and from claims with suppliers relating to the operations of the Group's vessels. Currently, management is not aware of any such claims or contingent liabilities requiring disclosure in the unaudited condensed consolidated financial statements.

14. Derivative Financial Instruments

        The fair value of the derivative assets is as follows:

	December 31, 2017		June 30, 2018
Derivative assets carried at fair value through profit or loss (FVTPL)
Interest rate swaps		11,535		31,629
Forward foreign exchange contracts		2,123		101
Derivative assets designated and effective as hedging instruments carried at fair value
Cross currency swaps		4,553		5,916
Total		18,211		37,646
Derivative financial instruments, current assets		2,199		6,206
Derivative financial instruments, non-current assets		16,012		31,440
Total		18,211		37,646

F-18

        The fair value of the derivative liabilities is as follows:

	December 31, 2017		June 30, 2018
Derivative liabilities designated and effective as hedging instruments carried at fair value
Cross currency swaps		605		212
Derivative liabilities carried at fair value through profit or loss (FVTPL)
Interest rate swaps		1,210		1,152
Forward foreign exchange contracts		—		894
Total		1,815		2,258
Derivative financial instruments, current liability		1,815		1,109
Derivative financial instruments, non-current liability		—		1,149
Total		1,815		2,258

Interest rate swap agreements

        The Group enters into interest rate swap agreements which convert the floating interest rate exposure into a fixed interest rate in order to economically hedge a portion of the Group's exposure to fluctuations in prevailing market interest rates. Under the interest rate swaps, the bank counterparty effects quarterly floating-rate payments to the Group for the notional amount based on the U.S. dollar LIBOR, and the Group effects quarterly payments to the bank on the notional amounts at the respective fixed rates.

F-19

Interest rate swaps held for trading

        The principal terms of the interest rate swaps held for trading are as follows:

						Notional Amount
Company	Counterparty	Trade Date	Effective Date	Termination Date	Fixed Interest Rate	December 31, 2017		June 30, 2018
GasLog	Deutsche Bank AG	July 2016	July 2016	July 2020	1.98%		66,667		66,667
GasLog	Deutsche Bank AG	July 2016	July 2016	July 2021	1.98%		66,667		66,667
GasLog	Deutsche Bank AG	July 2016	July 2016	July 2022	1.98%		66,667		66,667
GasLog	DNB Bank ASA ("DNB")	July 2016	July 2016	July 2020	1.784%		73,333		73,333
GasLog (1)	DNB	July 2016	July 2016	July 2021	1.729%		73,333		73,333
GasLog	DNB	July 2016	July 2016	July 2022	1.719%		73,333		73,333
GasLog (3)	HSBC Bank plc ("HSBC")	July 2016	July 2016	July 2020	1.896%		33,333		—
GasLog (3)	HSBC	July 2016	July 2016	July 2021	1.818%		33,333		—
GasLog	HSBC	July 2016	July 2016	July 2022	1.79%		33,333		33,333
GasLog	Nordea Bank Finland	July 2016	July 2016	July 2020	1.905%		66,667		66,667
GasLog (2)	Nordea Bank Finland	July 2016	July 2016	July 2021	1.84%		66,667		—
GasLog	Nordea Bank Finland	July 2016	July 2016	July 2022	1.815%		66,667		66,667
GasLog	Skandinavinska Enskilda Banken AB ("SEB")	July 2016	July 2016	July 2020	1.928%		50,000		50,000
GasLog	SEB	July 2016	July 2016	July 2021	1.8405%		50,000		50,000
GasLog (3)	SEB	July 2016	July 2016	July 2022	1.814%		50,000		—
GasLog	HSBC	Feb 2017	Feb 2017	Feb 2022	2.005%		100,000		100,000
GasLog	Nordea Bank Finland	Feb 2017	Feb 2017	Mar 2022	2.0145%		100,000		100,000
GasLog	ABN Amro Bank NV ("ABN")	Feb 2017	Feb 2017	Mar 2022	2.003%		100,000		100,000
GasLog (4)	Nordea Bank Finland	May 2018	July 2020	July 2026	3.070%		—		N/A
GasLog (2)	Nordea Bank Finland	May 2018	May 2018	July 2026	2.562%		—		66,667
GasLog (4)	SEB	May 2018	July 2020	July 2024	3.025%		—		N/A
GasLog (3)	SEB	May 2018	Apr 2018	July 2025	2.300%		—		50,000
GasLog (4)	DNB	May 2018	July 2020	July 2024	3.056%		—		N/A
GasLog (1)	DNB	May 2018	July 2018	July 2025	2.472%		—		N/A
GasLog (3)	HSBC	May 2018	Apr 2018	July 2024	2.475%		—		33,333
GasLog (3)	HSBC	May 2018	Apr 2018	July 2025	2.550%		—		33,333
GasLog (4)	Citibank Europe Plc. ("CITI")	May 2018	July 2020	July 2024	3.082%		—		N/A
GasLog (4)	CITI	May 2018	July 2021	July 2025	3.095%		—		N/A
					Total		1,170,000		1,170,000

⁽¹⁾

In May 2018, the Group terminated an interest rate swap originally maturing in July 2021 with an effective date of July 2018. This swap was subsequently replaced with a new swap of the same notional amount of $73,333 with an effective date of July 2018 and a new maturity date of July 2025.

⁽²⁾

Effective May 2018, the Group terminated the interest rate swap originally maturing in July 2021 and replaced with a new swap of the same notional amount of $66,667 maturing in July 2026.

⁽³⁾

Effective May 2018, the Group terminated the interest rate swap with SEB originally maturing in July 2022 and replaced with a new swap of the same notional amount of $50,000 with an effective date of April 2018 and a new maturity date of July 2025. In addition, in May 2018, the Group terminated the interest rate swap agreements with HSBC with an aggregate notional value of $66,666 and entered into new agreements of the same notional amounts with an effective date April 2018.

⁽⁴⁾

In May 2018, the Group entered into new interest rate swap agreements with various counterparties with an aggregate notional value of $250,000, with effective dates in July 2020 and July 2021, maturing between 2024 and 2026.

        The derivative instruments listed above were not designated as cash flow hedging instruments. The change in the fair value of these contracts for the three and six months ended June 30, 2018 amounted to a net loss of $3,838 and net gain of $20,151, respectively (for the three and six months ended June 30, 2017: a net loss of $4,978

F-20

and $3,140, respectively), which was recognized against profit or loss in the period incurred and is included in Loss/gain on swaps. During the three and six months ended June 30, 2018, the net loss of $3,838 and a net gain of $20,151 derived mainly from the fact that the LIBOR yield curve, which was used to calculate the present value of the estimated future cash flows, was lower/higher than the agreed fixed interest rates resulting in an increase/decrease in derivative liabilities from interest rate swaps held for trading.

Cross currency swap agreements ("CCS")

        The Group enters into CCS which convert the floating interest rate exposure and the variability of the USD functional currency equivalent cash flows into a fixed interest rate and principal on maturity, in order to hedge the Group's exposure to fluctuations deriving from its NOK 2021 Bonds.

        The principal terms of the CCS designated as cash flow hedging instruments are as follows:

						Notional Amount
Company	Counterparty	Trade Date	Effective Date	Termination Date	Fixed Interest Rate	December 31, 2017		June 30, 2018
GasLog	DNB	June 2016	June 2016	May 2021	8.59%		30,050		30,050
GasLog	SEB	June 2016	June 2016	May 2021	8.59%		30,050		30,050
GasLog	Nordea Bank Finland	June 2016	June 2016	May 2021	8.59%		30,050		30,050
					Total		90,150		90,150

        For the three and six months ended June 30, 2018, the effective portion of changes in the fair value of CCS amounting to a loss of $4,062 and a gain of $2,128 has been recognized in Other comprehensive income (for the three and six months ended June 30, 2017: a gain of $3,342 and $3,709). For the three and six months ended June 30, 2018, a loss of $90 and $159, respectively, was recycled to profit or loss representing the realized loss on CCS in relation to the interest expenses component of the hedge (for the three and six months ended June 30, 2017: a loss of $203 and $526, respectively). Additionally, for the three and six months ended June 30, 2018, a gain of $3,676 and a loss of $1,077, was recognized in Other comprehensive income in relation to the retranslation of the NOK Bonds in U.S. dollars as of June 30, 2018 (for the three and six months ended June 30, 2017: a loss of $2,782 and $3,516, respectively).

Forward foreign exchange contracts

        The Group uses forward foreign exchange contracts to mitigate foreign exchange transaction exposures in British Pounds Sterling ("GBP") and Euros ("EUR"). Under these forward foreign exchange contracts, the bank counterparty will effect fixed payments in GBP or EUR to the Group and the Group will effect fixed payments in USD to the bank counterparty on the respective settlement dates. All forward foreign exchange contracts are considered by management to be part of economic hedge arrangements but have not been formally designated as such.

        The principal terms of the forward foreign exchange contracts held for trading are as follows:

Company	Counterparty	Trade Date	Number of Contracts	Settlement Dates	Fixed Exchange Rate (USD/GBP)	Total Exchange Amount (in thousands)
GasLog	SEB	August 2017	6	July-December 2018	1.3042	£1,800
					Total	£1,800

F-21

Company	Counterparty	Trade Date	Number of Contracts	Settlement Dates	Fixed Exchange Rate (USD/EUR)	Total Exchange Amount (in thousands)
GasLog	Nordea Bank Finland	August 2017	6	July-December 2018	1.1986	€4,500
GasLog	SEB	August 2017	6	July-December 2018	1.1966	€6,000
GasLog	DNB	October 2017	1	July 2018	1.1746	€1,995
GasLog	Citibank	November 2017	1	July 2018	1.2023	€2,000
GasLog	Citibank	November 2017	1	August 2018	1.2048	€2,000
GasLog	Citibank	November 2017	1	September 2018	1.2072	€2,000
GasLog	Citibank	November 2017	1	October 2018	1.2099	€2,000
GasLog	Citibank	November 2017	1	November 2018	1.2123	€2,000
GasLog	Citibank	November 2017	1	December 2018	1.2148	€2,000
GasLog	Citibank	May 2018	1	July 2018	1.1758	€1,000
GasLog	Citibank	May 2018	1	August 2018	1.1786	€1,000
GasLog	Citibank	May 2018	1	September 2018	1.1816	€1,000
GasLog	Citibank	May 2018	1	October 2018	1.1844	€1,000
GasLog	Citibank	May 2018	1	November 2018	1.1875	€1,000
GasLog	Citibank	May 2018	1	December 2018	1.1905	€1,000
GasLog	SEB	May 2018	6	July-December 2018	1.1831	€6,000
GasLog	HSBC	May 2018	6	July-December 2018	1.1847	€3,000
GasLog	Citibank	May 2018	1	January 2019	1.1954	€2,500
GasLog	Citibank	May 2018	1	February 2019	1.1983	€2,500
GasLog	Citibank	May 2018	1	March 2019	1.2012	€2,500
GasLog	SEB	May 2018	3	January-March 2019	1.1984	€7,500
GasLog	ABN	June 2018	1	April 2019	1.1903	€2,500
GasLog	ABN	June 2018	1	May 2019	1.1936	€2,500
GasLog	ABN	June 2018	1	June 2019	1.1968	€2,500
GasLog	DNB	June 2018	1	April 2019	1.1910	€2,500
GasLog	DNB	June 2018	1	May 2019	1.1943	€2,500
GasLog	DNB	June 2018	1	June 2019	1.1975	€2,500
					Total	€69,495

        The derivative instruments listed above were not designated as cash flow hedging instruments as of June 30, 2018. The change in the fair value of these contracts for the three and six months ended June 30, 2018 amounted to a net loss of $3,764 and $2,916 (for the three and six months ended June 30, 2017: net gain of $1,491 and $1,968), which was recognized against profit or loss in the period incurred and is included in Loss/gain on derivatives.

F-22

15. Financial Costs and (Loss)/Gain on Derivatives

        An analysis of financial costs and loss/(gain) on derivatives is as follows:

	For the three months ended						For the six months ended
	June 30, 2017			June 30, 2018			June 30, 2017			June 30, 2018
Amortization and write off of deferred loan/bond issuance costs and premium		(2,978	)		(3,232	)		(6,437	)		(6,144	)
Interest expense on loans		(21,099	)		(28,066	)		(43,581	)		(51,263	)
Interest expense on bonds and realized loss on cross-currency swaps		(8,451	)		(7,442	)		(11,971	)		(14,915	)
Finance lease charge		(2,722	)		(2,634	)		(5,436	)		(5,262	)
Loss arising on NOK bond repurchase at a premium		(1,459	)		—			(1,459	)		—
Other financial costs		(369	)		(626	)		(718	)		(1,013	)
Total financial costs		(37,078	)		(42,000	)		(69,602	)		(78,597	)
Unrealized (loss)/gain on derivative financial instruments held for trading (Note 14)		(3,487	)		74			(1,172	)		17,235
Realized (loss)/gain on interest rate swaps held for trading		(2,226	)		1,003			(4,377	)		390
Recycled loss of cash flow hedges reclassified to profit or loss		(4,368	)		—			(4,368	)		—
Realized gain on forward foreign exchange contracts held for trading		361			357			195			1,843
Ineffective portion of cash flow hedges		—			(267	)		—			(530	)
Total (loss)/gain on derivatives		(9,720	)		1,167			(9,722	)		18,938

F-23

16. Cash Flow Reconciliations

        The reconciliation of the Group's non-cash investing and financing activities for the period ended June 30, 2018 is presented in the tables below:

        A reconciliation of borrowings arising from financing activities is as follows:

	Opening balance		Cash flows			Other comprehensive income		Non-cash items		Deferred financing costs, assets			Total
Borrowings outstanding as of January 1, 2018		2,547,556		—			—		—		—			2,547,556
Proceeds from bank loans and bonds		—		498,225			—		—		—			498,225
Bank loan and bond repayments		—		(108,958	)		—		—		—			(108,958	)
Additions in deferred loan fees		—		(7,295	)		—		1,447		(13,385	)		(19,233	)
Amortization of deferred loan issuance costs and premium (Note 15)		—		—			—		6,144		—			6,144
Retranslation of the NOK Bonds in U.S. dollars		—		—			1,077		—		—			1,077
Borrowings outstanding as of June 30, 2018		2,547,556		381,972			1,077		7,591		(13,385	)		2,924,811

        A reconciliation of derivatives arising from financing activities is as follows:

	Opening balance			Other comprehensive income			Non-cash items			Total
Net derivative assets as of January 1, 2018		(16,396	)		—			—			(16,396	)
Unrealized gain on derivative financial instruments held for trading (Note 15)		—			—			(17,235	)		(17,235	)
Ineffective portion of cash flow hedges (Note 15)		—			—			530			530
Effective portion of changes in the fair value of derivatives designated as cash flow hedging instruments		—			(2,287	)		—			(2,287	)
Net derivative assets as of June 30, 2018		(16,396	)		(2,287	)		(16,705	)		(35,388	)

F-24

        A reconciliation of tangible fixed assets, vessels under construction and vessel held under finance lease arising from investing activities is as follows:

	Opening balance		Cash flows		Non-cash items			Total
Tangible fixed assets, vessels under construction and vessel held under finance lease as of January 1, 2018		4,153,550		—		—			4,153,550
Additions (Note 5)		—		588,929		12,410			601,339
Transfer under "Other non-current assets"		—		—		(1,650	)		(1,650	)
Depreciation expense (Note 5)		—		—		(74,342	)		(74,342	)
Tangible fixed assets vessels under construction and vessel held under finance lease as of June 30, 2018		4,153,550		588,929		(63,582	)		4,678,897

        A reconciliation of finance lease liabilities arising from financing activities is as follows:

	Opening balance		Cash flows			Non-cash items		Total
Finance lease liabilities as of January 1, 2018		213,428		—			—		213,428
Finance lease charge (Note 15)		—		—			5,262		5,262
Payments for interest		—		(5,262	)		—		(5,262	)
Payments for finance lease liability		—		(3,588	)		—		(3,588	)
Finance lease liabilities as of June 30, 2018		213,428		(8,850	)		5,262		209,840

        A reconciliation of equity offerings arising from financing activities is as follows:

	Cash flows			Non-cash items		Total
Proceeds from GasLog Partners' preference unit offerings (net of underwriting discounts and commissions)		111,544			—		111,544
Proceeds from public offerings and private placement (net of underwriting discounts and commissions)		24			—		24
Offering costs		(660	)		276		(384	)
Net proceeds from equity offerings in the period ended June 30, 2018		110,908			276		111,184

17. Share-Based Compensation

        The terms of the 2013 Omnibus Incentive Compensation Plan (the "Plan") and the assumptions for the valuation of Restricted Stock Units ("RSUs") and Stock Appreciation Rights or Stock Options (collectively the "SARs") have been disclosed in Note 21 "Share-Based Compensation" in the annual audited consolidated financial statements for the year ended December 31, 2017.

F-25

        On April 2, 2018, GasLog granted to executives, managers and certain employees of the Group 149,786 RSUs and 416,458 SARs in accordance with the Plan. The RSUs will vest on April 2, 2021 while the SARs will vest incrementally with one-third of the SARs vesting on each of April 2, 2019, 2020 and 2021. The compensation cost for the SARs is recognized on an accelerated basis as though each separately vesting portion of the SARs is a separate award.

Awards	Number	Grant date	Expiry date	Exercise     price	Fair value at grant date
RSUs	149,786	April 2, 2018	n/a	n/a	$16.30
SARs	416,458	April 2, 2018	April 2, 2028	$16.30	$5.3001

        In accordance with the terms of the Plan, there are only service condition requirements. The awards will be settled in cash or in shares at the sole discretion of the compensation committee of the board of directors. These awards have been treated as equity settled because the Group has no present obligation to settle in cash. The amount to be settled for each SAR exercised is computed in each case, as the excess, if any, of the fair market value (the closing price of shares) on the exercise date over the exercise price of the SAR.

        The fair value of the SARs has been calculated based on the Modified Black-Scholes-Merton method. Expected volatility was based on historical share price volatility for the period since GasLog's initial public offering. The significant assumptions used to estimate the fair value of the SARs are set out below:

Inputs into the model
Grant date share closing price	$	16.30
Exercise price	$	16.30
Expected volatility		44.5	%
Expected term		6 years
Risk-free interest rate for the period similar to the expected term		2.61	%

Fair value

        The fair value of the RSUs was determined by using the grant date closing price of $16.30 per common unit and was not further adjusted since the holders are entitled to dividends.

F-26

Movement in RSUs and SARs during the period

        The summary of RSUs and SARs is presented below:

	Number of awards			Weighted average exercise price per share		Weighted average share price at the date of exercise		Weighted average contractual life		Aggregate fair value
RSUs
Outstanding as of January 1, 2018		425,702			—		—		1.39		5,636
Granted during the period		149,786			—		—		—		2,441
Forfeited during the period		(1,179	)		—		—		—		(14	)
Vested during the period		(86,136	)		—		—		—		(1,655	)
Outstanding as of June 30, 2018		488,173			—		—		1.63		6,408
SARs
Outstanding as of January 1, 2018		2,031,279			14.59		—		7.68		7,874
Granted during the period		416,458			—		—		—		2,207
Exercised during the period		(12,878	)		—		18.06		—		(47	)
Forfeited during the period		(3,333	)		—		—		—		(12	)
Expired during the period		(12,198	)		—		—				(72	)
Outstanding as of June 30, 2018		2,419,328			14.86		—		7.63		9,950

        As of June 30, 2018, 1,406,290 SARs have vested but have not been exercised.

        The terms of the GasLog Partners' 2015 Long-Term Incentive Plan (the "GasLog Partners' Plan") and the assumptions for the valuation of Restricted Common Units ("RCUs") and Performance Common Units ("PCUs") have been disclosed in Note 21 "Share-Based Compensation" in the annual audited consolidated financial statements for the year ended December 31, 2017.

        On April 2, 2018, GasLog Partners granted to its executives 24,608 RCUs and 24,608 PCUs in accordance with the GasLog Partners' Plan. The RCUs and PCUs will vest on April 2, 2021. The holders are entitled to cash distributions that will be accrued and settled on vesting.

Awards	Number	Grant date	Expiry date	Fair value at grant date
RCUs	24,608	April 2, 2018	n/a	$23.40
PCUs	24,608	April 2, 2018	n/a	$23.40

        In accordance with the terms of the GasLog Partners' Plan, the awards will be settled in cash or in common units at the sole discretion of the board of directors or such committee as may be designated by the board to administer the GasLog Partners' Plan. These awards have been treated as equity settled because the Partnership has no present obligation to settle them in cash.

Fair value

        The fair value of the RCUs and PCUs in accordance with the GasLog Partners' Plan was determined by using the grant date closing price of $23.40 per common unit and was not further adjusted since the holders are entitled to cash distributions.

F-27

Movement in RCUs and PCUs during the period

        The summary of RCUs and PCUs is presented below:

	Number of awards			Weighted average contractual life		Aggregate fair value
RCUs
Outstanding as of January 1, 2018		67,475			1.38		1,429
Granted during the period		24,608			—		576
Vested during the period		(16,999	)		—		(410	)
Outstanding as of June 30, 2018		75,084			1.75		1,595
PCUs
Outstanding as of January 1, 2018		67,475			1.38		1,429
Granted during the period		24,608			—		576
Vested during the period		(16,999	)		—		(410	)
Outstanding as of June 30, 2018		75,084			1.75		1,595

        On April 3, 2018, 16,999 RCUs and 16,999 PCUs vested under the GasLog Partners' Plan.

        The total expense recognized in respect of share-based compensation for the three and six months ended June 30, 2018 was $1,329 and $2,515 (for the three and six months ended June 30, 2017: $1,223 and $2,235). The total accrued cash distribution as of June 30, 2018 is $764 (December 31, 2017: $814).

18. Earnings/(losses) per Share ("EPS")

        Basic earnings/(losses) per share was calculated by dividing the profit for the period attributable to the owners of the common shares by the weighted average number of common shares issued and outstanding during the period.

        Diluted earnings/(losses) per share is calculated by dividing the profit for the period attributable to the owners of the Group by the weighted average number of all potential ordinary shares assumed to have been converted into common shares, unless such potential ordinary shares have an antidilutive effect.

F-28

        The following reflects the earnings/(losses) and share data used in the basic and diluted earnings/(losses) per share computations:

	For the three months ended
	June 30, 2017			June 30, 2018
Basic loss per share
Loss for the period attributable to owners of the Group		(7,515	)		(3,620	)
Plus:
Dividend on preference shares		(2,516	)		(2,516	)
Loss for the period available to owners of the Group		(10,031	)		(6,136	)
Weighted average number of shares outstanding, basic		80,624,124			80,801,654
Basic loss per share		(0.12	)		(0.08	)
Diluted loss per share
Loss for the period available to owners of the Group used in the calculation of diluted loss per share		(10,031	)		(6,136	)
Weighted average number of shares outstanding, basic		80,624,124			80,801,654
Dilutive potential ordinary shares		—			—
Weighted average number of shares used in the calculation of diluted loss per share		80,624,124			80,801,654
Diluted loss per share		(0.12	)		(0.08	)

        The Group excluded the dilutive effect of 971,911 SARs in calculating diluted EPS for the three months ended June 30, 2018, as they were anti-dilutive (June 30, 2017: 2,153,024 SARs and 438,595 RSUs).

	For the six months ended
	June 30, 2017			June 30, 2018
Basic (loss)/earnings per share
Profit for the period attributable to owners of the Group		1,237			15,684
Less:
Dividend on preference shares		(5,031	)		(5,032	)
(Loss)/profit for the period available to owners of the Group		(3,794	)		10,652
Weighted average number of shares outstanding, basic		80,592,912			80,758,631
Basic (loss)/earnings per share		(0.05	)		0.13
Diluted (loss)/earnings per share
(Loss)/profit for the period available to owners of the Group used in the calculation of diluted (loss)/earnings per share		(3,794	)		10,652
Weighted average number of shares outstanding, basic		80,592,912			80,758,631
Dilutive potential ordinary shares		—			732,041
Weighted average number of shares used in the calculation of diluted (loss)/earnings per share		80,592,912			81,490,672
Diluted (loss)/earnings per share		(0.05	)		0.13

        The Group excluded the dilutive effect of 971,911 SARs in calculating diluted EPS for the six months ended June 30, 2018, as they were anti-dilutive (June 30, 2017: 2,153,024 SARs and 438,595 RSUs).

19. Subsequent Events

        On August 1, 2018, the board of directors declared a quarterly cash dividend of $0.15 per common share payable on August 23, 2018 to shareholders of record as of August 13, 2018.

F-29

QuickLinks

Exhibit 99.2

Management's Discussion and Analysis of Financial Condition and Results of Operation
GASLOG LTD. INDEX TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

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Document and Entity Information	6 Months Ended
	Jun. 30, 2018
Class of Shares
Entity Registrant Name	GasLog Ltd.
Entity Central Index Key	0001534126
Document Type	6-K
Document Period End Date	Jun. 30, 2018
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Entity Current Reporting Status	Yes
Entity Filer Category	Accelerated Filer
Trading Symbol	GLOG
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	Q2

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Condensed consolidated statements of financial position - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Non-current assets
Goodwill	$ 9,511	$ 9,511
Investment in associates	20,489	20,800
Deferred financing costs	4,134	17,519
Other non-current assets	1,820	428
Derivative financial instruments	31,440	16,012
Tangible fixed assets	4,378,295	3,772,566
Vessels under construction	89,956	166,655
Vessel held under finance lease	210,646	214,329
Total non-current assets	4,746,291	4,217,820
Current assets
Trade and other receivables	18,817	10,706
Dividends receivable and other amounts due from related parties	8,075	8,666
Derivative financial instruments	6,206	2,199
Inventories	9,722	6,839
Prepayments and other current assets	4,132	4,569
Short-term investments	26,000
Restricted cash	2,321
Cash and cash equivalents	314,369	384,092
Total current assets	389,642	417,071
Total assets	5,135,933	4,634,891
Equity
Preference shares	46	46
Share capital	810	810
Contributed surplus	883,314	911,766
Reserves	18,890	18,347
Treasury shares	(4,472)	(6,960)
(Accumulated deficit)/ retained earnings	9,894	(5,980)
Equity attributable to owners of the Group	908,482	918,029
Non-controlling interests	954,587	845,105
Total equity	1,863,069	1,763,134
Current liabilities
Trade accounts payable	12,098	11,526
Ship management creditors	1,847	2,394
Amounts due to related parties	72	35
Derivative financial instruments	1,109	1,815
Other payables and accruals	120,565	93,418
Borrowings, current portion	182,556	179,367
Finance lease liability, current portion	6,485	6,302
Total current liabilities	324,732	294,857
Non-current liabilities
Derivative financial instruments	1,149
Borrowings, non-current portion	2,742,255	2,368,189
Finance lease liability, non-current portion	203,355	207,126
Other non-current liabilities	1,373	1,585
Total non-current liabilities	2,948,132	2,576,900
Total equity and liabilities	$ 5,135,933	$ 4,634,891

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Condensed consolidated statements of profit or loss - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Condensed consolidated statements of profit or loss
Revenues	$ 132,824	$ 129,930	$ 271,302	$ 258,215
Net pool allocation	6,958	492	15,611	1,320
Voyage expenses and commissions	(4,634)	(3,319)	(9,915)	(6,191)
Vessel operating and supervision costs	(32,703)	(29,833)	(67,016)	(57,322)
Depreciation	(38,813)	(34,451)	(74,342)	(68,159)
General and administrative expenses	(10,352)	(10,246)	(22,365)	(20,225)
Profit from operations	53,280	52,573	113,275	107,638
Financial costs	(42,000)	(37,078)	(78,597)	(69,602)
Financial income	1,294	744	2,310	1,135
(Loss)/gain on derivatives	1,167	(9,720)	18,938	(9,722)
Share of profit of associates	471	385	827	847
Total other expenses, net	(39,068)	(45,669)	(56,522)	(77,342)
Profit for the period	14,212	6,904	56,753	30,296
Attributable to:
Owners of the Group	(3,620)	(7,515)	15,684	1,237
Non-controlling interests	$ 17,832	$ 14,419	$ 41,069	$ 29,059
Loss per share - basic and diluted
(Loss)/earnings per share - basic and diluted	$ (0.08)	$ (0.12)	$ 0.13	$ (0.05)

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Condensed consolidated statements of comprehensive income or loss - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Condensed consolidated statements of comprehensive income or loss
Profit for the period	$ 14,212	$ 6,904	$ 56,753	$ 30,296
Items that may be reclassified subsequently to profit or loss:
Effective portion of changes in fair value of cash flow hedges, net of amounts recycled to profit or loss	(296)	763	1,210	719
Recycled loss of cash flow hedges reclassified to profit or loss		4,368		4,368
Other comprehensive income/(loss) for the period	(296)	5,131	1,210	5,087
Total comprehensive income for the period	13,916	12,035	57,963	35,383
Attributable to:
Owners of the Group	(3,916)	(2,384)	16,894	6,324
Non-controlling interests	$ 17,832	$ 14,419	$ 41,069	$ 29,059

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Condensed consolidated statements of changes in equity - USD ($) $ in Thousands		Preference Units/Shares	Share capital	Contributed surplus	Reserves	Treasury shares	(Accumulated deficit)/ retained earnings	Attributable to owners of the Group	Non-controlling interests	Total
Balance at beginning of period at Dec. 31, 2016		$ 46	$ 810	$ 966,974	$ 10,160	$ (10,861)	$ (21,486)	$ 945,643	$ 564,039	$ 1,509,682
Net proceeds from GasLog Partners' public offering (Note 3)									225,776	225,776
Dividend declared (common and preference shares) (Note 12)				(27,597)				(27,597)	(27,938)	(55,535)
Share-based compensation, net of accrued dividend (Note 17)					2,023			2,023		2,023
Settlement of share-based compensation					(1,771)	1,664		(107)		(107)
Profit for the period							1,237	1,237	29,059	30,296
Other comprehensive income for the period					5,087			5,087		5,087
Total comprehensive income for the period					5,087		1,237	6,324	29,059	35,383
Balance at the end of the period at Jun. 30, 2017		46	810	939,377	15,499	(9,197)	(20,249)	926,286	790,936	1,717,222
Balance at beginning of period at Dec. 31, 2017		46	810	911,766	18,347	(6,960)	(5,980)	918,029	845,105	1,763,134
Opening adjustment	[1]				(436)		190	(246)		(246)
Net proceeds from GasLog Partners' public offering (Note 3)									111,184	111,184
Dividend declared (common and preference shares) (Note 12)				(28,452)				(28,452)	(42,771)	(71,223)
Share-based compensation, net of accrued dividend (Note 17)					2,233			2,233		2,233
Settlement of share-based compensation					(2,464)	2,550		86		86
Treasury shares, net						(62)		(62)		(62)
Profit for the period							15,684	15,684	41,069	56,753
Other comprehensive income for the period					1,210			1,210		1,210
Total comprehensive income for the period					1,210		15,684	16,894	41,069	57,963
Balance at the end of the period at Jun. 30, 2018		$ 46	$ 810	$ 883,314	$ 18,890	$ (4,472)	$ 9,894	$ 908,482	$ 954,587	$ 1,863,069

[1] Adjusted so as to reflect certain amendments introduced due to the adoption of IFRS 15 Revenue from Contracts with Customers and IFRS 9 Financial Instruments, which became effective on January 1, 2018 (Note 2).

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Condensed consolidated statement of cash flows $ in Thousands	6 Months Ended
	Jun. 30, 2018 USD ($)	Jun. 30, 2017 USD ($)
Cash flows from operating activities:
Profit for the period	$ 56,753	$ 30,296
Adjustments for:
Depreciation	74,342	68,159
Share of profit of associates	(827)	(847)
Financial income	(2,310)	(1,135)
Financial costs	78,597	69,602
Unrealized foreign exchange (gain)/ loss on cash and cash equivalents	63	(538)
Unrealized loss/(gain) on derivative financial instruments held for trading, including ineffective portion of cash flow hedges (Note 15)	(16,705)	1,172
Recycled loss of cash flow hedges reclassified to profit or loss		4,368
Share-based compensation (Note 17)	2,515	2,235
Adjusted profit/(loss)	192,428	173,312
Movements in working capital	(1,712)	(5,344)
Cash provided by operations	190,716	167,968
Interest paid	(63,914)	(63,853)
Net cash provided by operating activities	126,802	104,115
Cash flows from investing activities:
Payments for tangible fixed assets, vessels under construction and vessel held under finance lease	(588,929)	(63,010)
Dividends received from associate	500	1,043
Return of contributed capital from associate		59
Other investments		(13,944)
Purchase of short-term investments	(36,000)	(20,000)
Maturity of short-term investments	10,000	28,000
Restricted cash	(2,321)
Financial income received	2,124	1,126
Net cash used in investing activities	(614,626)	(66,726)
Cash flows from financing activities:
Proceeds from bank loans and bonds	498,225	280,000
Bank loan and bond repayments	(108,958)	(276,158)
Payment of loan issuance costs	(7,295)	(6,234)
Proceeds from GasLog Partners' public common unit offerings (net of underwriting discounts and commissions)	24	87,840
Proceeds from GasLog Partners' preference unit offerings (net of underwriting discounts and commissions)	111,544	139,222
Payment of equity raising costs	(660)	(336)
Payment for NOK bonds repurchase at a premium		(1,459)
Payment for cross currency swaps' termination		(20,603)
Purchase of treasury shares	(62)
Proceeds from stock options' exercise	157	137
Dividends paid	(71,223)	(53,019)
Payments for finance lease liability	(3,588)	(13)
Net cash provided by financing activities	418,164	149,377
Effects of exchange rate changes on cash and cash equivalents	(63)	538
Increase/(decrease) in cash and cash equivalents	(69,723)	187,304
Cash and cash equivalents, beginning of the period	384,092	227,024
Cash and cash equivalents, end of the period	314,369	414,328
Non-cash investing and financing activities
Capital expenditures - net payable at the end of the period	15,426	4,805
Equity raising costs included in liabilities at the end of the period	88	955
Loan issuance costs included in liabilities at the end of the period	$ 79	57
Dividend declared included in liabilities at the end of the period		$ 2,516

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Organization and Operations

6 Months Ended

Jun. 30, 2018

Organization and Operations

Organization and Operations

1. Organization and Operations

        GasLog Ltd. ("GasLog") was incorporated in Bermuda on July 16, 2003. GasLog and its subsidiaries (the "Group") are primarily engaged in the ownership, operation and management of vessels in the liquefied natural gas ("LNG") market, providing maritime services for the transportation of LNG on a worldwide basis and LNG vessel management services. The Group conducts its operations through its vessel-owning subsidiaries and through its vessel management services subsidiary. The Group's operations are carried out from offices in Piraeus, London, New York, Singapore and Monaco. The registered office of GasLog is Clarendon House, 2 Church Street, Hamilton HM 11, Bermuda. GasLog's chairman, Peter G. Livanos, is GasLog's largest shareholder through his ownership of Ceres Shipping Ltd. ("Ceres Shipping"), which controls Blenheim Holdings Ltd. As of June 30, 2018, entities controlled by members of the Livanos family, including GasLog's chairman, are deemed to beneficially own approximately 40.11% of GasLog's issued and outstanding common shares. As a result of his ownership of GasLog's common shares, Mr. Livanos can effectively control the outcome of most matters on which GasLog's shareholders are entitled to vote.

        As of June 30, 2018, GasLog held a 29.1% interest (including the 2% interest through general partner units) in GasLog Partners LP ("GasLog Partners" or the "Partnership") and, as a result of its ownership of the general partner, and the fact that the general partner elects the majority of the Partnership's directors in accordance with the Partnership Agreement, GasLog has the ability to control the Partnership's affairs and policies. Consequently, GasLog Partners is consolidated in the Group's financial statements.

        The accompanying unaudited condensed consolidated financial statements include the financial statements of GasLog and its subsidiaries. Unless indicated otherwise, the subsidiaries listed below are 100% held (either directly or indirectly) by GasLog. As of June 30, 2018, the Group's structure is as follows:

Name	Place of incorporation	Date of incorporation	Principal activities	Cargo capacity (cbm)	Vessel	Delivery date
Subsidiaries:
GasLog Investments Ltd.	BVI	July 2003	Holding company	—	—	—
GasLog Carriers Ltd. ("GasLog Carriers")	Bermuda	February 2008	Holding company	—	—	—
GasLog Shipping Company Ltd.	Bermuda	January 2006	Holding company	—	—	—
GasLog Partners GP LLC	Marshall Islands	January 2014	Holding company	—	—	—
GasLog Cyprus Investments Ltd.	Cyprus	December 2016	Holding company	—	—	—
GasLog Services UK Ltd.	England and Wales	May 2014	Service company	—	—	—
GasLog Services US Inc.	Delaware	May 2014	Service company	—	—	—
GasLog Asia Pte Ltd.	Singapore	May 2015	Service company	—	—	—
GasLog LNG Services Ltd.	Bermuda	August 2004	Vessel management services	—	—	—
GasLog Monaco S.A.M.	Monaco	February 2010	Service company	—	—	—
GAS-one Ltd.	Bermuda	February 2008	Vessel-owning company	155,000	GasLog Savannah	May 2010
GAS-two Ltd.	Bermuda	February 2008	Vessel-owning company	155,000	GasLog Singapore	July 2010
GAS-six Ltd.	Bermuda	February 2011	Vessel-owning company	155,000	GasLog Skagen	July 2013
GAS-nine Ltd.	Bermuda	June 2011	Vessel-owning company	155,000	GasLog Saratoga	December 2014
GAS-ten Ltd.	Bermuda	June 2011	Vessel-owning company	155,000	GasLog Salem	April 2015
GAS-twelve Ltd.	Bermuda	December 2012	Vessel-owning company	174,000	GasLog Glasgow	June 2016
GAS-fifteen Ltd.	Bermuda	August 2013	Vessel-owning company	153,600	GasLog Chelsea	October 2013
GAS-eighteen Ltd.	Bermuda	January 2014	Vessel-owning company	145,000	Methane Lydon Volney	April 2014
GAS-twenty two Ltd.	Bermuda	May 2014	Vessel-owning company	174,000	GasLog Genoa	March 2018
GAS-twenty three Ltd.	Bermuda	May 2014	Vessel-owning company	174,000	Hull No. 2131	Q1 2019(1)
GAS-twenty four Ltd.	Bermuda	June 2014	Vessel-owning company	174,000	GasLog Houston	January 2018
GAS-twenty five Ltd.	Bermuda	June 2014	Vessel-owning company	174,000	GasLog Hong Kong	March 2018
GAS-twenty six Ltd.	Bermuda	January 2015	Finance lease asset company(2)	170,000	Methane Julia Louise	March 2015
GAS-twenty seven Ltd.	Bermuda	January 2015	Vessel-owning company	170,000	Methane Becki Anne	March 2015
GAS-twenty eight Ltd.	Bermuda	September 2016	Vessel-owning company	180,000	Hull No. 2213(4)	Q2 2020(1)
GAS-twenty nine Ltd.	Bermuda	September 2016	Vessel-owning company	180,000	Hull No. 2212	Q3 2019(1)
GAS-thirty Ltd.	Bermuda	December 2017	Vessel-owning company	180,000	Hull No. 2262	Q3 2020(1)
GAS-thirty one Ltd.	Bermuda	December 2017	Vessel-owning company	180,000	Hull No. 2274	Q2 2020(1)
GAS-thirty two Ltd.	Bermuda	December 2017	Dormant	—	—	—
GAS-thirty three Ltd.	Bermuda	May 2018	Dormant	—	—	—
GAS-thirty four Ltd.	Bermuda	May 2018	Dormant	—	—	—
GasLog Shipping Limited	BVI	July 2003	Dormant	—	—	—
29.1% interest subsidiaries:
GasLog Partners LP	Marshall Islands	January 2014	Holding company	—	—	—
GasLog Partners Holdings LLC	Marshall Islands	April 2014	Holding company	—	—	—
GAS-three Ltd.	Bermuda	April 2010	Vessel-owning company	155,000	GasLog Shanghai	January 2013
GAS-four Ltd.	Bermuda	April 2010	Vessel-owning company	155,000	GasLog Santiago	March 2013
GAS-five Ltd.	Bermuda	February 2011	Vessel-owning company	155,000	GasLog Sydney	May 2013
GAS-seven Ltd.	Bermuda	March 2011	Vessel-owning company	155,000	GasLog Seattle	December 2013
GAS-eight Ltd.	Bermuda	March 2011	Vessel-owning company	155,000	Solaris	June 2014
GAS-eleven Ltd.	Bermuda	December 2012	Vessel-owning company	174,000	GasLog Greece	March 2016
GAS-thirteen Ltd.	Bermuda	July 2013	Vessel-owning company	174,000	GasLog Geneva	September 2016
GAS-fourteen Ltd.	Bermuda	July 2013	Vessel-owning company	174,000	GasLog Gibraltar	October 2016
GAS-sixteen Ltd.	Bermuda	January 2014	Vessel-owning company	145,000	Methane Rita Andrea	April 2014
GAS-seventeen Ltd.	Bermuda	January 2014	Vessel-owning company	145,000	Methane Jane Elizabeth	April 2014
GAS-nineteen Ltd.	Bermuda	April 2014	Vessel-owning company	145,000	Methane Alison Victoria	June 2014
GAS-twenty Ltd.	Bermuda	April 2014	Vessel-owning company	145,000	Methane Shirley Elisabeth	June 2014
GAS-twenty one Ltd.	Bermuda	April 2014	Vessel-owning company	145,000	Methane Heather Sally	June 2014
25% interest associate:
Egypt LNG Shipping Ltd.	Bermuda	May 2010	Vessel-owning company	145,000	Methane Nile Eagle	December 2007
20% interest associate:
Gastrade S.A. ("Gastrade")	Greece	June 2010	Service company	—	—	—
33.33% joint venture:
The Cool Pool Limited (the "Cool Pool")(3)	Marshall Islands	September 2015	Service company	—	—	—

(1)	For newbuildings, expected delivery quarters as of June 30, 2018 are presented.
(2)	On February 24, 2016, GAS-twenty six Ltd. completed the sale and leaseback of theMethane Julia Louisewith a subsidiary of Mitsui Co. Ltd. ("Mitsui"). Refer to Note 6.
(3)	On October 1, 2015, GasLog Carriers, Dynagas Ltd. ("Dynagas") and Golar LNG Limited ("Golar") ("Pool Owners") and The Cool Pool Limited signed a LNG carrier pooling agreement (the "LNG Carrier Pool" or "Pool Agreement") to market their vessels, which are currently operating in the LNG shipping spot market. As of June 30, 2018, the LNG Carrier Pool—named the "Cool Pool"—consists of 17 modern, high quality and essentially equivalent vessels powered by fuel efficient tri-fuel diesel electric ("TFDE") propulsion technology. The participation of the Pool Owners' vessels in the Cool Pool is as follows: Dynagas: one vessel; GasLog: six vessels; and Golar: ten vessels. Each vessel owner continues to be fully responsible for the staffing and technical management of their respective vessels. For the operation of the Cool Pool, a Marshall Islands service company named "The Cool Pool Limited" or the "Pool Manager", was incorporated in September 2015 acting as an agent. In June and July 2018, Dynagas Ltd. removed its three vessels from the Cool Pool.
(4)	On January 12, 2018, GasLog entered into a shipbuilding contract with Samsung Heavy Industries Co. Ltd (“Samsung”)  for the construction of a 180,000 cbm GTT Mark III Flex LNG Carrier with LP-2S propulsion (Hull No. 2213) that is scheduled to be delivered in the second quarter of 2020. This vessel will be the vessel to be chartered to Centrica for an initial period of approximately seven years. The 180,000 cbm GTT Mark III Flex Plus LNG Carrier with LP-2S propulsion (Hull No. 2212) to be delivered in the third quarter of 2019 is currently without charter.

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Basis of Presentation

6 Months Ended

Jun. 30, 2018

Basis of Presentation

Basis of Presentation

2. Basis of Presentation

        These unaudited condensed consolidated financial statements have been prepared in accordance with International Accounting Standard ("IAS") 34 Interim Financial Reporting as issued by the International Accounting Standards Board ("IASB"). Certain information and footnote disclosures required by International Financial Reporting Standards ("IFRS") for a complete set of annual financial statements have been omitted, and, therefore, these unaudited condensed consolidated financial statements should be read in conjunction with the Group's annual consolidated financial statements as of and for the year ended December 31, 2017 filed with the SEC on February 28, 2018. On August 1, 2018 GasLog's board of directors authorized the unaudited condensed consolidated financial statements for issuance.

        The critical accounting judgments and key sources of estimation uncertainty were disclosed in the Company's annual consolidated financial statements for the year ended December 31, 2017 and remain unchanged.

        The unaudited condensed consolidated financial statements are expressed in U.S. dollars ("USD"), which is the functional currency of all of the subsidiaries in the Group because their vessels operate in international shipping markets in which revenues and expenses are primarily settled in USD, and the Group's most significant assets and liabilities are paid for and settled in USD.

        The financial statements are prepared on the historical cost basis, except for the revaluation of derivative financial instruments. The same accounting policies and methods of computation have been followed in these unaudited condensed consolidated financial statements as were applied in the preparation of the Group's financial statements for the year ended December 31, 2017, except for the changes resulting from the adoption of IFRS 9 Financial Instruments and IFRS 15 Revenue from Contracts with Customers (as discussed below).

        Management anticipates that the Group's primary sources of funds will be available cash, cash from operations and borrowings under existing and new loan agreements. The Group may also seek to raise additional common or other forms of equity. Management believes that these sources of funds will be sufficient for the Group to meet its liquidity needs and comply with its financial covenants for at least twelve months from the end of the reporting period and therefore it is appropriate to prepare the financial statements on a going concern basis.

Adoption of new and revised IFRS

(a) Standards and interpretations adopted in the current period

        In May 2014, the IASB issued IFRS 15 Revenue from Contracts with Customers which applies to all contracts with customers: the main exceptions are leases, financial instruments and insurance contracts. IFRS 15 specifies how and when an IFRS reporter will recognize revenue as well as requiring such entities to provide users of financial statements with more informative, relevant disclosures. The standard supersedes IAS 18 Revenue, IAS 11 Construction Contracts and a number of revenue-related interpretations. The standard was effective for annual periods beginning on or after January 1, 2018 and was applied by the Group using the modified retrospective approach. The adoption of the standard as of January 1, 2018 resulted in an increase of $246 on the Group's Accumulated deficit and an increase of the same amount on the Group's Other payables and accruals under the modified retrospective approach, as a result of the reassessment of the timing of the performance obligations in relation to positioning and repositioning fees and associated expenses.

        The Group assessed that under a time charter arrangement, the hire rate per the charter agreement has two components: the lease component and the service component relating to the vessel operating costs. The revenue in relation to the lease component of the agreements is accounted for under the leases standard. The revenue in relation to the service component relates to vessel operating expenses which include expenses that are paid by the vessel owner such as management fees, crew wages, provisions and stores, technical maintenance and insurance expenses. These costs are essential to operating a charter and the charterers receive the benefit of these when the vessel is used during the contracted time and, therefore, these costs will be accounted for in accordance with the requirements of IFRS 15 Revenue from Contracts with Customers.

        In relation to short-term charters under the Cool Pool, management believes mobilization of a vessel from a previous port of discharge to a subsequent port of loading does not result in a separate benefit for charterers and that the activity is thus incapable of being distinct. This activity is considered to be a required set-up activity to fulfil the contract. On that basis, it was concluded that positioning and repositioning fees and associated expenses should be recognized over the period of the contract, and not at a certain point in time.

        In July 2014, the IASB issued the complete version of IFRS 9 Financial Instruments. IFRS 9 specifies how an entity should classify and measure financial assets and financial liabilities. The new standard requires all financial assets to be subsequently measured at amortized cost or fair value depending on the business model of the legal entity in relation to the management of the financial assets and the contractual cash flows of the financial assets. The standard also requires a financial liability to be classified as either at fair value through profit or loss or at amortized cost. In addition, a new hedge accounting model was introduced, that is designed to be more closely aligned with how entities undertake risk management activities when hedging financial and non-financial risk exposures.

        When an entity first applies IFRS 9 Financial Instruments, it may choose as its accounting policy to continue to apply the hedge accounting requirements of IAS 39 Financial Instruments, Recognition and Measurement, instead of the requirements in Chapter 6 of IFRS 9 Financial Instruments. An entity shall apply that policy to all of its hedging relationships. The Group has selected to apply hedge accounting under IFRS 9 Financial Instruments.

        The Group has elected to take the transition relief as provided by IFRS 9.7.2.15 which permits an entity not to restate prior periods on initial application of IFRS 9 Financial Instruments and any adjustments to be made in the current year. The adoption of this standard as of January 1, 2018 resulted in a decrease of $436 on the Group's Accumulated deficit and an equal decrease on the Group's Reserves, as a result of the change in the accounting for the currency basis element of the cross-currency swaps ("CCS") to flow directly to the statement of profit or loss.

(b) Standards and amendments in issue not yet adopted

        At the date of authorization of these unaudited condensed consolidated financial statements, the following standards and amendments relevant to the Group were in issue but not yet effective:

        In January 2016, the IASB issued IFRS 16 Leases, which sets out the principles for the recognition, measurement, presentation and disclosure of leases for both parties to a contract, i.e., the customer ("lessee") and the supplier ("lessor"). IFRS 16 eliminates the classification of leases by lessees as either operating leases or finance leases and, instead, introduces a single lessee accounting model. Applying that model, a lessee is required to recognise: (a) assets and liabilities for all leases with a term of more than 12 months, unless the underlying asset is of low value; and (b) depreciation of lease assets separately from interest on lease liabilities in the statement of profit or loss. Lessors continue to classify their leases as operating leases or finance leases, and to account for those two types of leases differently. IFRS 16 supersedes the previous leases Standard, IAS 17 Leases, and related Interpretations. The standard is effective from January 1, 2019, with early adoption permitted only with concurrent adoption of IFRS 15 Revenue from Contracts with Customers. Management has elected not to adopt early, and it anticipates that the implementation of this standard will not have a material impact on the Group's consolidated financial statements, since the changes for lessors are fairly minor and the Group's lessee obligations are not significant.

        The impact of all other IFRS standards and amendments issued but not yet adopted is not expected to be material on the Group's unaudited condensed consolidated financial statements.

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Non-controlling Interest in GasLog Partners

6 Months Ended

Jun. 30, 2018

Non-controlling Interest in GasLog Partners

Non-controlling Interest in GasLog Partners

3. Non-controlling Interest in GasLog Partners

        On January 17, 2018, GasLog Partners completed a public offering of 4,600,000 8.200% Series B Cumulative Redeemable Perpetual Fixed to Floating Rate Preference Units (the "Partnership's Series B Preference Units"), including 600,000 units issued upon the exercise in full by the underwriters of their option to purchase additional Partnership's Series B Preference Units, at a price to the public of $25.00 per preference unit. The net proceeds from the offering, after deducting underwriting discounts, commissions and other offering expenses, were $111,194. The Partnership's Series B Preference Units are listed on the New York Stock Exchange under the symbol "GLOP PR B".

        The profit allocation to non-controlling interests is based on the distribution policy for available cash stated in the Partnership Agreement and is illustrated in the table below:

	Marginal Percentage Interest in Distributions
	Total Quarterly Distribution Target Amount	Unitholders	General Partner	Holders of IDRs
Minimum Quarterly Distribution	$ 0.375	98.0%	2.0%	0%
First Target Distribution	$0.375 up to $0.43125	98.0%	2.0%	0%
Second Target Distribution	$0.43125 up to $0.46875	85.0%	2.0%	13.0%
Third Target Distribution	$0.46875 up to $0.5625	75.0%	2.0%	23.0%
Thereafter	Above $0.5625	50.0%	2.0%	48.0%

	For the three months ended		For the six months ended
Allocation of GasLog Partners' profit(*)	June 30, 2017	June 30, 2018	June 30, 2017	June 30, 2018
Partnership's profit attributable to:
Common unitholders	17,349	17,095	32,073	41,152
Subordinated unitholders	N/A	N/A	5,085	N/A
General partner	357	349	777	888
Incentive distribution rights ("IDRs")	103	—	896	2,368
Paid and accrued preference equity distributions	1,549	5,457	1,549	10,495
Total	19,358	22,901	40,380	54,903
Partnership's profit allocated to GasLog	4,939	5,069	11,321	13,834
Partnership's profit allocated to non-controlling interests	14,419	17,832	29,059	41,069
Total	19,358	22,901	40,380	54,903

* Excludes profits of GAS-eleven Ltd., GAS-thirteen Ltd., GAS-eight Ltd. and GAS-fourteen Ltd. for the period prior to their transfers to the Partnership on May 3, 2017, July 3, 2017, October 20, 2017 and April 26, 2018, respectively.

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Investment in Associates

6 Months Ended

Jun. 30, 2018

Investment in Associates

Investment in Associates

4. Investment in Associates

        The movements in investment in associates are reported in the following table:

	June 30, 2018
As of January 1, 2018	20,800
Share of profit of associates	827
Dividend declared	(1,138	)
As of June 30, 2018	20,489

        On February 9, 2017, GasLog acquired a 20% shareholding in Gastrade, a private limited company licensed to develop an independent natural gas system offshore Alexandroupolis in Northern Greece utilizing a floating storage and regasification unit ("FSRU") along with other fixed infrastructure. GasLog, as well as being a shareholder, will provide operations and maintenance ("O&M") services for the FSRU through an O&M agreement which was signed on February 23, 2018.

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Tangible Fixed Assets, Vessels Under Construction and Vessel Held Under Finance Lease

6 Months Ended

Jun. 30, 2018

Tangible Fixed Assets, Vessels Under Construction and Vessel Held Under Finance Lease

Tangible Fixed Assets, Vessels Under Construction and Vessel Held Under Finance Lease

5. Tangible Fixed Assets, Vessels Under Construction and Vessel Held Under Finance Lease

        The movements in tangible fixed assets, vessels under construction and vessel held under finance lease are reported in the following table:

	Vessels			Office property and other tangible assets		Total tangible fixed assets			Vessels under construction			Vessel held under finance lease
Cost
As of January 1, 2018		4,217,866			19,224		4,237,090			166,655			228,523
Additions		33,225			3,758		36,983			564,211			145
Transfer from vessels under construction		639,260			—		639,260			(639,260	)		—
Transfer under "Other non-current assets"		—			—		—			(1,650	)		—
Fully amortized fixed assets		(5,000	)		—		(5,000	)		—			—
As of June 30, 2018		4,885,351			22,982		4,908,333			89,956			228,668
Accumulated depreciation
As of January 1, 2018		460,815			3,709		464,524			—			14,194
Depreciation expense		70,104			410		70,514			—			3,828
Fully amortized fixed assets		(5,000	)		—		(5,000	)		—			—
As of June 30, 2018		525,919			4,119		530,038			—			18,022
Net book value
As of December 31, 2017		3,757,051			15,515		3,772,566			166,655			214,329
As of June 30, 2018		4,359,432			18,863		4,378,295			89,956			210,646

        Vessels with an aggregate carrying amount of $4,359,432 as of June 30, 2018 (December 31, 2017: $3,757,051) have been pledged as collateral under the terms of the Group's loan agreements.

        In May 2014, GAS-twenty two Ltd. entered into a shipbuilding contract with Samsung for the construction of an LNG carrier (174,000 cubic meters). The vessel (GasLog Genoa) was delivered on March 29, 2018.

        In June 2014, GAS-twenty four Ltd. and GAS-twenty five Ltd. entered into shipbuilding contracts with Hyundai Heavy Industries Co., Ltd. ("Hyundai") for the construction of two LNG carriers (174,000 cubic meters each). The first vessel, the GasLog Houston, was delivered on January 8, 2018, while the second vessel, the GasLog Hong Kong, was delivered on March 20, 2018.

Vessels under construction

        In May 2014, GAS-twenty three Ltd. entered into a shipbuilding contract with Samsung for the construction of an LNG carrier (174,000 cubic meters). The vessel is expected to be delivered in the first quarter of 2019.

        In September 2016, GAS-twenty nine Ltd. entered into a shipbuilding contract with Samsung for the construction of one LNG carrier (180,000 cubic meters). The vessel is expected to be delivered in the third quarter of 2019.

        On March 21, 2017, GasLog entered into a Heads of Agreement ("HOA") with Samsung for the engineering in relation to the potential FSRU conversion of an existing vessel of the Group. As of June 30, 2018, $3,400 of the cost was paid, in accordance with the payment terms.

        On July 10, 2017, GasLog entered into an agreement with Keppel Shipyard Limited ("Keppel") for the detailed engineering in relation to an FSRU conversion of one vessel. As of June 30, 2018, $4,265 of the cost was paid, in accordance with the payment terms.

        In January 2018, GAS-twenty eight Ltd. entered into a shipbuilding contract with Samsung for the construction of one LNG carrier (180,000 cubic meters). The vessel is expected to be delivered in the second quarter of 2020.

        In March 2018, GAS-thirty one Ltd. entered into a shipbuilding contract with Samsung for the construction of one LNG carrier (180,000 cubic meters). The vessel is expected to be delivered in the second quarter of 2020.

        In May 2018, GAS-thirty Ltd. entered into a shipbuilding contract with Samsung for the construction of one LNG carrier (180,000 cubic meters). The vessel is expected to be delivered in the third quarter of 2020.

        Vessels under construction represent scheduled advance payments to the shipyards as well as certain capitalized expenditures. As of June 30, 2018, the Group has paid to the shipyard $85,000 for the vessels that are under construction and expects to pay the remaining installments as they come due upon each vessel's keel laying, launching and delivery (Note 13).

        The vessels under construction costs as of December 31, 2017 and June 30, 2018 are as follows:

	December 31, 2017	June 30, 2018
Progress shipyard installments	153,116	85,023
Onsite supervision costs	10,570	4,260
Critical spare parts, equipment and other vessel delivery expenses	2,969	673
Total	166,655	89,956

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Sale and Leaseback

6 Months Ended

Jun. 30, 2018

Sale and Leaseback

Sale and Leaseback

6. Sale and Leaseback

        An analysis of the finance lease liabilities is as follows:

	December 31, 2017	June 30, 2018
Finance lease liability, current portion	6,302	6,485
Finance lease liability, non-current portion	207,126	203,355
Total	213,428	209,840

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Borrowings

6 Months Ended

Jun. 30, 2018

Borrowings

Borrowings

7. Borrowings

        An analysis of the borrowings is as follows:

	December 31, 2017		June 30, 2018
Amounts due within one year	188,167		193,709
Less: unamortized deferred loan/bond issuance costs	(8,800	)	(11,153	)
Borrowings, current portion	179,367		182,556
Amounts due after one year	2,399,849		2,784,651
Less: unamortized deferred loan/bond issuance costs	(31,660	)	(42,396	)
Borrowings, non-current portion	2,368,189		2,742,255
Total	2,547,556		2,924,811

Bank Loans

        The main terms of the Group's loan facilities in existence as of December 31, 2017 have been disclosed in Note 13 "Borrowings" of the annual audited consolidated financial statements for the year ended December 31, 2017. During the six months ended June 30, 2018, the Group, through GasLog Partners, prepaid in full the $29,750 of the outstanding debt of GAS-nineteen Ltd., GAS-twenty Ltd. and GAS-twenty one Ltd., which would have been originally due in April 2018.

        The carrying amount of the Group's bank debt recognized in the unaudited condensed consolidated financial statements approximates its fair value after adjusting for the unamortized loan/bond issuance costs.

Bonds

        The main terms of the Group's senior unsecured NOK bonds maturing in 2021 (the "NOK 2021 Bonds") have been disclosed in the annual audited consolidated financial statements for the year ended December 31, 2017. Refer to Note 13 "Borrowings".

        The carrying amount under the NOK 2021 Bonds, net of unamortized financing costs, as of June 30, 2018 is $90,964 (December 31, 2017: $89,723, aggregate carrying amount under the NOK 2021 Bonds) while their aggregate fair value is $97,832 based on a USD/NOK exchange rate of 0.1228 as of June 30, 2018 (December 31, 2017: $97,416, based on a USD/NOK exchange rate of 0.1213).

        The Group was in compliance with its financial covenants as of June 30, 2018.

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Related Party Transactions

6 Months Ended

Jun. 30, 2018

Related Party Transactions

Related Party Transactions

8. Related Party Transactions

        The Group has the following balances with related parties which have been included in the unaudited condensed consolidated statements of financial position:

Current Assets

Dividends receivable and other amounts due from related parties

	December 31, 2017		June 30, 2018
Dividends receivable from associate		125		763
Due from The Cool Pool Limited		8,186		6,997
Other receivables		355		315
Total		8,666		8,075

Current Liabilities

Amounts due to related parties

	December 31, 2017		June 30, 2018
Ship management creditors		993		450
Amounts due to related parties		35		72

        Ship management creditors' liability is comprised of cash collected from Egypt LNG Shipping Ltd. to cover the obligations of its vessel under the Group's management.

        Amounts due to related parties of $72 as of June 30, 2018 (December 31, 2017: $35) are expenses paid by a related party on behalf of the Group and payables to other related parties for the office lease and other operating expenses.

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Revenues from Contracts with Customers

6 Months Ended

Jun. 30, 2018

Revenues from Contracts with Customers

Revenues from Contracts with Customers

9. Revenues from Contracts with Customers

        The Group has recognized the following amounts relating to revenues:

	For the three months ended				For the six months ended
	June 30, 2017		June 30, 2018		June 30, 2017		June 30, 2018
Revenues from time charters		121,581		127,573		242,283		252,467
Revenues from The Cool Pool Limited (GasLog vessels)		8,023		5,047		15,378		18,452
Revenues from vessel management services		326		204		554		383
Total		129,930		132,824		258,215		271,302

        Revenues from The Cool Pool Limited relate to revenues received from GasLog's vessels operating in the Cool Pool and do not include the net pool allocation to GasLog of $6,958 and $15,611 for the three and six months ended June 30, 2018, respectively ($492 and $1,320 for the three and six months ended June 30, 2017, respectively).

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General and Administrative Expenses

6 Months Ended

Jun. 30, 2018

General and Administrative Expenses

General and Administrative Expenses

10. General and Administrative Expenses

        An analysis of general and administrative expenses is as follows:

	For the three months ended					For the six months ended
	June 30, 2017			June 30, 2018		June 30, 2017			June 30, 2018
Employee costs		4,403			4,677		9,614			11,628
Board of directors' fees		542			622		1,103			1,344
Share-based compensation		1,223			1,329		2,235			2,515
Rent and utilities		541			570		1,144			1,086
Travel and accommodation		555			701		1,050			1,033
Legal and professional fees		2,393			1,704		3,955			3,326
Foreign exchange differences, net		(84	)		63		(39	)		(241	)
Other expenses		673			686		1,163			1,674
Total		10,246			10,352		20,225			22,365

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Other Payables and Accruals

6 Months Ended

Jun. 30, 2018

Other Payables and Accruals

Other Payables and Accruals

11. Other Payables and Accruals

        An analysis of other payables and accruals is as follows:

	December 31, 2017		June 30, 2018
Social contributions		1,244		797
Unearned revenue		34,926		41,089
Accrued legal and professional fees		1,567		994
Accrued board of directors' fees		577		622
Accrued employee costs		5,494		5,156
Accrued off-hire		5,284		7,926
Accrued crew costs		4,027		3,898
Accrued purchases		4,227		17,289
Accrued financing costs		1,984		36
Accrued interest		27,851		34,681
Accrued payable to charterers		4,179		5,859
Other accruals		2,058		2,218
Total		93,418		120,565

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Share Capital and Preference Shares

6 Months Ended

Jun. 30, 2018

Share Capital and Preference Shares

Share Capital and Preference Shares

12. Share Capital and Preference Shares

        GasLog's authorized share capital consists of 500,000,000 shares with a par value of $0.01 per share.

        As of June 30, 2018, the share capital consisted of 80,814,081 issued and outstanding common shares, par value $0.01 per share, 179,045 treasury shares issued and held by GasLog and 4,600,000 preference shares issued and outstanding. The movements in the number of shares, the share capital, the preference shares, the contributed surplus and the treasury shares are reported in the following table:

	Number of Shares								Amounts
	Number of Common Shares			Number of Treasury Shares			Number of Preference Shares		Share capital		Preference Shares		Contributed surplus			Treasury Shares
Outstanding as of January 1, 2018		80,717,885			275,241			4,600,000		810		46		911,766			(6,960	)
Treasury shares, net		(2,818	)		2,818			—		—		—		—			(62	)
Treasury shares distributed for awards vested or exercised in the period		99,014			(99,014	)		—		—		—		—			2,550
Dividends declared deducted from Contributed surplus due to accumulated deficit		—			—			—		—		—		(28,452	)		—
Outstanding as of June 30, 2018		80,814,081			179,045			4,600,000		810		46		883,314			(4,472	)

        The treasury shares were acquired by GasLog in 2014 and 2018 in relation to the share-based compensation (Note 17).

Dividend distribution

        On February 15, 2018, the board of directors declared a quarterly cash dividend of $0.14 per common share, which was paid on March 15, 2018 to shareholders of record as of March 5, 2018 for a total amount of $11,300.

        On March 8, 2018, the board of directors declared a dividend on the Series A Preference Shares of $0.546875 per share, or $2,516 in aggregate, payable on April 2, 2018 to holders of record as of March 29, 2018. GasLog paid the declared dividend to the transfer agent on March 29, 2018.

        On May 3, 2018, the board of directors declared a quarterly cash dividend of $0.15 per common share, which was paid on May 24, 2018 to shareholders of record as of May 14, 2018 for a total amount of $12,120.

        On May 11, 2018, the board of directors declared a dividend on the Series A Preference Shares of $0.546875 per share, or $2,516  in aggregate, payable on July 2, 2018 to holders of record as of June 29, 2018. GasLog paid the declared dividend to the transfer agent on June 28, 2018.

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Commitments and Contingencies

6 Months Ended

Jun. 30, 2018

Commitments and Contingencies

Commitments and Contingencies

13. Commitments and Contingencies

(a)       As of June 30, 2018, the Group had the following commitments as lessee relating to buildings under operating leases:

Period	June 30, 2018
Not later than one year		1,185
Later than one year and not later than three years		1,382
Later than three years and not later than five years		565
Total		3,132

(b)       Commitments relating to the vessels under construction (Note 5) as of June 30, 2018 payable to Samsung were as follows:

Period	June 30, 2018
Not later than one year		255,568
Later than one year and not later than three years		620,310
Total		875,878

        Also, pursuant to a Heads of Agreement entered into by GAS-twenty two Ltd. and GAS-twenty three Ltd. with Methane Services Limited ("MSL"), a subsidiary of Shell, on March 8, 2016, the GasLog entities declared their options with Samsung to install reliquefaction plants on board the vessels. MSL agreed to reimburse 50% of such cost per vessel, resulting in an aggregate commitment to pay $3,200 per vessel to GasLog after the installation has been completed. In the event the reliquefaction plants do not meet certain specified performance criteria during operation, GasLog will have an obligation to pay to MSL a daily compensation amount per vessel, which obligation will in whole or in part be satisfied by certain obligations of the manufacturers incurred for failure to meet the specified performance criteria. The amount of $3,200 relating to GAS-twenty two Ltd. was included in Trade and other receivables since the reliquefaction plant installation has been completed.

(c)       Future gross minimum lease payments receivable in relation to non-cancellable time charter agreements for vessels in operation, including a vessel under a finance lease (Note 6), as of June 30, 2018 are as follows (30 off-hire days are assumed when each vessel will undergo scheduled dry-docking and ten additional days per vessel after the dry-docking for the vessel enhancements mentioned further below; in addition, early delivery of the vessels by the charterers or any exercise of the charterers' options to extend the terms of the charters are not accounted for):

Period	June 30, 2018
Not later than one year		411,409
Later than one year and not later than three years		639,397
Later than three years and not later than five years		425,591
More than five years		499,041
Total		1,975,438

        Future gross minimum lease payments disclosed in the above table excludes the lease payments of the vessels that are under construction.

(d)       In April and May 2017, GasLog LNG Services Ltd. entered into agreements in relation to some of the Group's vessels, with the aim of enhancing their operational performance. Commitments relating to these agreements, without including additional estimated costs for which no agreement had been signed as of June 30, 2018, are as follows:

Period	June 30, 2018
Not later than one year		11,142
Total		11,142

(e)	Related to the acquisition of six vessels from a subsidiary of MSL in 2014 and another two vessels in 2015, the Group is committed to purchase depot spares from MSL with an aggregate value of $8,000 of which depot spares with value of $660 have been purchased and paid as of June 30, 2018 and are included in Tangible fixed assets (Note 5). The remaining spares are expected to be acquired before the end of the initial term of the charter party agreements.
(f)	On November 2, 2015, a letter agreement between GasLog and MSL was signed reimbursing MSL the sum of $2,654 for value as of November 1, 2015, adjusted for future value through January 2020 up to $3,801, allowing for the future use of the reimbursement amount against the funding of specific MSL projects, such as costs associated with change orders on LNG newbuildings and or modifications of existing vessels as agreed between the parties. As of June 30, 2018, the outstanding commitment is $1,349.
(g)	On October 11, 2016, GasLog LNG Services Ltd. entered into an agreement whereby it has access to all long lead items ("LLIs") necessary for the conversion of a GasLog LNG carrier vessel into an FSRU whereby such conversion work would be undertaken by Keppel. GasLog is only obligated to pay for such LLIs if utilized for a GasLog vessel conversion or, if the same have not been utilized in a GasLog vessel conversion within three years from November 2016, the items may be put to GasLog at 110% of the original cost, or GasLog may call for the purchase of such LLIs at a discounted price of 85% of the original cost.
(h)	On July 10, 2017, GasLog entered into an agreement with Keppel for the detailed engineering in relation to an FSRU conversion of one vessel. Commitment relating to this agreement as of June 30, 2018 is as follows:

Period	June 30, 2018
Not later than one year		3,787
Total		3,787

(i)       In September 27, 2017 (and in addition to the seven existing maintenance agreements signed in 2014 in relation to GasLog vessels), GasLog LNG Services Ltd. entered into further maintenance agreements with Wartsila Greece S.A. ("Wartsila") in respect of eight GasLog LNG carriers. The agreements cover the renewal of existing maintenance agreements on four GasLog vessels and extend the servicing to four additional LNG carriers. The agreements ensure dynamic maintenance planning, technical support, security of spare parts supply, specialist technical personnel and performance monitoring.

        Various claims, suits and complaints, including those involving government regulations, arise in the ordinary course of the shipping business. In addition, losses may arise from disputes with charterers, environmental claims, agents and insurers and from claims with suppliers relating to the operations of the Group's vessels. Currently, management is not aware of any such claims or contingent liabilities requiring disclosure in the unaudited condensed consolidated financial statements.

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Derivative Financial Instruments

6 Months Ended

Jun. 30, 2018

Derivative Financial Instruments

Derivative Financial Instruments

14. Derivative Financial Instruments

        The fair value of the derivative assets is as follows:

	December 31, 2017		June 30, 2018
Derivative assets carried at fair value through profit or loss (FVTPL)
Interest rate swaps		11,535		31,629
Forward foreign exchange contracts		2,123		101
Derivative assets designated and effective as hedging instruments carried at fair value
Cross currency swaps		4,553		5,916
Total		18,211		37,646
Derivative financial instruments, current assets		2,199		6,206
Derivative financial instruments, non-current assets		16,012		31,440
Total		18,211		37,646

        The fair value of the derivative liabilities is as follows:

	December 31, 2017		June 30, 2018
Derivative liabilities designated and effective as hedging instruments carried at fair value
Cross currency swaps		605		212
Derivative liabilities carried at fair value through profit or loss (FVTPL)
Interest rate swaps		1,210		1,152
Forward foreign exchange contracts		—		894
Total		1,815		2,258
Derivative financial instruments, current liability		1,815		1,109
Derivative financial instruments, non-current liability		—		1,149
Total		1,815		2,258

Interest rate swap agreements

        The Group enters into interest rate swap agreements which convert the floating interest rate exposure into a fixed interest rate in order to economically hedge a portion of the Group's exposure to fluctuations in prevailing market interest rates. Under the interest rate swaps, the bank counterparty effects quarterly floating-rate payments to the Group for the notional amount based on the U.S. dollar LIBOR, and the Group effects quarterly payments to the bank on the notional amounts at the respective fixed rates.

Interest rate swaps held for trading

        The principal terms of the interest rate swaps held for trading are as follows:

							Notional Amount
Company		Counterparty	Trade Date	Effective Date	Termination Date	Fixed Interest Rate	December 31, 2017		June 30, 2018
GasLog		Deutsche Bank AG	July 2016	July 2016	July 2020	1.98%		66,667		66,667
GasLog		Deutsche Bank AG	July 2016	July 2016	July 2021	1.98%		66,667		66,667
GasLog		Deutsche Bank AG	July 2016	July 2016	July 2022	1.98%		66,667		66,667
GasLog		DNB Bank ASA ("DNB")	July 2016	July 2016	July 2020	1.784%		73,333		73,333
GasLog (1)		DNB	July 2016	July 2016	July 2021	1.729%		73,333		73,333
GasLog		DNB	July 2016	July 2016	July 2022	1.719%		73,333		73,333
GasLog (3)		HSBC Bank plc ("HSBC")	July 2016	July 2016	July 2020	1.896%		33,333		—
GasLog (3)		HSBC	July 2016	July 2016	July 2021	1.818%		33,333		—
GasLog		HSBC	July 2016	July 2016	July 2022	1.79%		33,333		33,333
GasLog		Nordea Bank Finland	July 2016	July 2016	July 2020	1.905%		66,667		66,667
GasLog (2)		Nordea Bank Finland	July 2016	July 2016	July 2021	1.84%		66,667		—
GasLog		Nordea Bank Finland	July 2016	July 2016	July 2022	1.815%		66,667		66,667
GasLog		Skandinavinska Enskilda Banken AB ("SEB")	July 2016	July 2016	July 2020	1.928%		50,000		50,000
GasLog		SEB	July 2016	July 2016	July 2021	1.8405%		50,000		50,000
GasLog (3)		SEB	July 2016	July 2016	July 2022	1.814%		50,000		—
GasLog		HSBC	Feb 2017	Feb 2017	Feb 2022	2.005%		100,000		100,000
GasLog		Nordea Bank Finland	Feb 2017	Feb 2017	Mar 2022	2.0145%		100,000		100,000
GasLog		ABN Amro Bank NV ("ABN")	Feb 2017	Feb 2017	Mar 2022	2.003%		100,000		100,000
GasLog (4)		Nordea Bank Finland	May 2018	July 2020	July 2026	3.070%		—		N/A
GasLog (2)		Nordea Bank Finland	May 2018	May 2018	July 2026	2.562%		—		66,667
GasLog (4)		SEB	May 2018	July 2020	July 2024	3.025%		—		N/A
GasLog (3)		SEB	May 2018	Apr 2018	July 2025	2.300%		—		50,000
GasLog (4)		DNB	May 2018	July 2020	July 2024	3.056%		—		N/A
GasLog (1)		DNB	May 2018	July 2018	July 2025	2.472%		—		N/A
GasLog (3)		HSBC	May 2018	Apr 2018	July 2024	2.475%		—		33,333
GasLog (3)		HSBC	May 2018	Apr 2018	July 2025	2.550%		—		33,333
GasLog (4)		Citibank Europe Plc. ("CITI")	May 2018	July 2020	July 2024	3.082%		—		N/A
GasLog (4)		CITI	May 2018	July 2021	July 2025	3.095%		—		N/A
						Total		1,170,000		1,170,000
(1)	In May 2018, the Group terminated an interest rate swap originally maturing in July 2021 with an effective date of July 2018. This swap was subsequently replaced with a new swap of the same notional amount of $73,333 with an effective date of July 2018 and a new maturity date of July 2025.
(2)	Effective May 2018, the Group terminated the interest rate swap originally maturing in July 2021 and replaced with a new swap of the same notional amount of $66,667 maturing in July 2026.
(3)	Effective May 2018, the Group terminated the interest rate swap with SEB originally maturing in July 2022 and replaced with a new swap of the same notional amount of $50,000 with an effective date of April 2018 and a new maturity date of July 2025. In addition, in May 2018, the Group terminated the interest rate swap agreements with HSBC with an aggregate notional value of $66,666 and entered into new agreements of the same notional amounts with an effective date April 2018.
(4)	In May 2018, the Group entered into new interest rate swap agreements with various counterparties with an aggregate notional value of $250,000, with effective dates in July 2020 and July 2021, maturing between 2024 and 2026.

        The derivative instruments listed above were not designated as cash flow hedging instruments. The change in the fair value of these contracts for the three and six months ended June 30, 2018 amounted to a net loss of $3,838 and net gain of $20,151, respectively (for the three and six months ended June 30, 2017: a net loss of $4,978 and $3,140, respectively), which was recognized against profit or loss in the period incurred and is included in Loss/gain on swaps. During the three and six months ended June 30, 2018, the net loss of $3,838 and a net gain of $20,151 derived mainly from the fact that the LIBOR yield curve, which was used to calculate the present value of the estimated future cash flows, was lower/higher than the agreed fixed interest rates resulting in an increase/decrease in derivative liabilities from interest rate swaps held for trading.

Cross currency swap agreements ("CCS")

        The Group enters into CCS which convert the floating interest rate exposure and the variability of the USD functional currency equivalent cash flows into a fixed interest rate and principal on maturity, in order to hedge the Group's exposure to fluctuations deriving from its NOK 2021 Bonds.

        The principal terms of the CCS designated as cash flow hedging instruments are as follows:

						Notional Amount
Company	Counterparty	Trade Date	Effective Date	Termination Date	Fixed Interest Rate	December 31, 2017		June 30, 2018
GasLog	DNB	June 2016	June 2016	May 2021	8.59%		30,050		30,050
GasLog	SEB	June 2016	June 2016	May 2021	8.59%		30,050		30,050
GasLog	Nordea Bank Finland	June 2016	June 2016	May 2021	8.59%		30,050		30,050
					Total		90,150		90,150

        For the three and six months ended June 30, 2018, the effective portion of changes in the fair value of CCS amounting to a loss of $4,062 and a gain of $2,128 has been recognized in Other comprehensive income (for the three and six months ended June 30, 2017: a gain of $3,342 and $3,709). For the three and six months ended June 30, 2018, a loss of $90 and $159, respectively, was recycled to profit or loss representing the realized loss on CCS in relation to the interest expenses component of the hedge (for the three and six months ended June 30, 2017: a loss of $203 and $526, respectively). Additionally, for the three and six months ended June 30, 2018, a gain of $3,676 and a loss of $1,077, was recognized in Other comprehensive income in relation to the retranslation of the NOK Bonds in U.S. dollars as of June 30, 2018 (for the three and six months ended June 30, 2017: a loss of $2,782 and $3,516, respectively).

Forward foreign exchange contracts

        The Group uses forward foreign exchange contracts to mitigate foreign exchange transaction exposures in British Pounds Sterling ("GBP") and Euros ("EUR"). Under these forward foreign exchange contracts, the bank counterparty will effect fixed payments in GBP or EUR to the Group and the Group will effect fixed payments in USD to the bank counterparty on the respective settlement dates. All forward foreign exchange contracts are considered by management to be part of economic hedge arrangements but have not been formally designated as such.

        The principal terms of the forward foreign exchange contracts held for trading are as follows:

Company	Counterparty	Trade Date	Number of Contracts	Settlement Dates	Fixed Exchange Rate (USD/GBP)	Total Exchange Amount (in thousands)
GasLog	SEB	August 2017	6	July-December 2018	1.3042	£1,800
					Total	£1,800

Company	Counterparty	Trade Date	Number of Contracts	Settlement Dates	Fixed Exchange Rate (USD/EUR)	Total Exchange Amount (in thousands)
GasLog	Nordea Bank Finland	August 2017	6	July-December 2018	1.1986	€4,500
GasLog	SEB	August 2017	6	July-December 2018	1.1966	€6,000
GasLog	DNB	October 2017	1	July 2018	1.1746	€1,995
GasLog	Citibank	November 2017	1	July 2018	1.2023	€2,000
GasLog	Citibank	November 2017	1	August 2018	1.2048	€2,000
GasLog	Citibank	November 2017	1	September 2018	1.2072	€2,000
GasLog	Citibank	November 2017	1	October 2018	1.2099	€2,000
GasLog	Citibank	November 2017	1	November 2018	1.2123	€2,000
GasLog	Citibank	November 2017	1	December 2018	1.2148	€2,000
GasLog	Citibank	May 2018	1	July 2018	1.1758	€1,000
GasLog	Citibank	May 2018	1	August 2018	1.1786	€1,000
GasLog	Citibank	May 2018	1	September 2018	1.1816	€1,000
GasLog	Citibank	May 2018	1	October 2018	1.1844	€1,000
GasLog	Citibank	May 2018	1	November 2018	1.1875	€1,000
GasLog	Citibank	May 2018	1	December 2018	1.1905	€1,000
GasLog	SEB	May 2018	6	July-December 2018	1.1831	€6,000
GasLog	HSBC	May 2018	6	July-December 2018	1.1847	€3,000
GasLog	Citibank	May 2018	1	January 2019	1.1954	€2,500
GasLog	Citibank	May 2018	1	February 2019	1.1983	€2,500
GasLog	Citibank	May 2018	1	March 2019	1.2012	€2,500
GasLog	SEB	May 2018	3	January-March 2019	1.1984	€7,500
GasLog	ABN	June 2018	1	April 2019	1.1903	€2,500
GasLog	ABN	June 2018	1	May 2019	1.1936	€2,500
GasLog	ABN	June 2018	1	June 2019	1.1968	€2,500
GasLog	DNB	June 2018	1	April 2019	1.1910	€2,500
GasLog	DNB	June 2018	1	May 2019	1.1943	€2,500
GasLog	DNB	June 2018	1	June 2019	1.1975	€2,500
					Total	€69,495

        The derivative instruments listed above were not designated as cash flow hedging instruments as of June 30, 2018. The change in the fair value of these contracts for the three and six months ended June 30, 2018 amounted to a net loss of $3,764 and $2,916 (for the three and six months ended June 30, 2017: net gain of $1,491 and $1,968), which was recognized against profit or loss in the period incurred and is included in Loss/gain on derivatives.

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Financial Costs and ( Loss)/Gain on Derivatives

6 Months Ended

Jun. 30, 2018

Financial Costs and (Loss)/Gain on Derivatives

Financial Costs and (Loss)/Gain on Derivatives

15. Financial Costs and (Loss)/Gain on Derivatives

        An analysis of financial costs and loss/(gain) on derivatives is as follows:

	For the three months ended						For the six months ended
	June 30, 2017			June 30, 2018			June 30, 2017			June 30, 2018
Amortization and write off of deferred loan/bond issuance costs and premium		(2,978	)		(3,232	)		(6,437	)		(6,144	)
Interest expense on loans		(21,099	)		(28,066	)		(43,581	)		(51,263	)
Interest expense on bonds and realized loss on cross-currency swaps		(8,451	)		(7,442	)		(11,971	)		(14,915	)
Finance lease charge		(2,722	)		(2,634	)		(5,436	)		(5,262	)
Loss arising on NOK bond repurchase at a premium		(1,459	)		—			(1,459	)		—
Other financial costs		(369	)		(626	)		(718	)		(1,013	)
Total financial costs		(37,078	)		(42,000	)		(69,602	)		(78,597	)
Unrealized (loss)/gain on derivative financial instruments held for trading (Note 14)		(3,487	)		74			(1,172	)		17,235
Realized (loss)/gain on interest rate swaps held for trading		(2,226	)		1,003			(4,377	)		390
Recycled loss of cash flow hedges reclassified to profit or loss		(4,368	)		—			(4,368	)		—
Realized gain on forward foreign exchange contracts held for trading		361			357			195			1,843
Ineffective portion of cash flow hedges		—			(267	)		—			(530	)
Total (loss)/gain on derivatives		(9,720	)		1,167			(9,722	)		18,938

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Cash Flow Reconciliations

6 Months Ended

Jun. 30, 2018

Cash Flow Reconciliations

Cash Flow Reconciliations

16. Cash Flow Reconciliations

        The reconciliation of the Group's non-cash investing and financing activities for the period ended June 30, 2018 is presented in the tables below:

        A reconciliation of borrowings arising from financing activities is as follows:

	Opening balance		Cash flows		Other comprehensive income		Non-cash items		Deferred financing costs, assets		Total
Borrowings outstanding as of January 1, 2018		2,547,556		—		—		—		—		2,547,556
Proceeds from bank loans and bonds		—		498,225		—		—		—		498,225
Bank loan and bond repayments		—		(108,958)		—		—		—		(108,958)
Additions in deferred loan fees		—		(7,295)		—		1,447		(13,385)		(19,233)
Amortization of deferred loan issuance costs and premium (Note 15)		—		—		—		6,144		—		6,144
Retranslation of the NOK Bonds in U.S. dollars		—		—		1,077		—		—		1,077
Borrowings outstanding as of June 30, 2018		2,547,556		381,972		1,077		7,591		(13,385)		2,924,811

        A reconciliation of derivatives arising from financing activities is as follows:

	Opening balance		Other comprehensive income		Non-cash items		Total
Net derivative assets as of January 1, 2018		(16,396)		—		—		(16,396)
Unrealized gain on derivative financial instruments held for trading (Note 15)		—		—		(17,235)		(17,235)
Ineffective portion of cash flow hedges (Note 15)		—		—		530		530
Effective portion of changes in the fair value of derivatives designated as cash flow hedging instruments		—		(2,287)		—		(2,287)
Net derivative assets as of June 30, 2018		(16,396)		(2,287)		(16,705)		(35,388)

        A reconciliation of tangible fixed assets, vessels under construction and vessel held under finance lease arising from investing activities is as follows:

	Opening balance		Cash flows		Non-cash items		Total
Tangible fixed assets, vessels under construction and vessel held under finance lease as of January 1, 2018		4,153,550		—		—		4,153,550
Additions (Note 5)		—		588,929		12,410		601,339
Transfer under "Other non-current assets"		—		—		(1,650)		(1,650)
Depreciation expense (Note 5)		—		—		(74,342)		(74,342)
Tangible fixed assets vessels under construction and vessel held under finance lease as of June 30, 2018		4,153,550		588,929		(63,582)		4,678,897

        A reconciliation of finance lease liabilities arising from financing activities is as follows:

	Opening balance		Cash flows		Non-cash items		Total
Finance lease liabilities as of January 1, 2018		213,428		—		—		213,428
Finance lease charge (Note 15)		—		—		5,262		5,262
Payments for interest		—		(5,262)		—		(5,262)
Payments for finance lease liability		—		(3,588)		—		(3,588)
Finance lease liabilities as of June 30, 2018		213,428		(8,850)		5,262		209,840

        A reconciliation of equity offerings arising from financing activities is as follows:

	Cash flows		Non-cash items		Total
Proceeds from GasLog Partners' preference unit offerings (net of underwriting discounts and commissions)		111,544		—		111,544
Proceeds from public offerings and private placement (net of underwriting discounts and commissions)		24		—		24
Offering costs		(660)		276		(384)
Net proceeds from equity offerings in the period ended June 30, 2018		110,908		276		111,184

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Share-Based Compensation

6 Months Ended

Jun. 30, 2018

Share-Based Compensation

Share-Based Compensation

17. Share-Based Compensation

        The terms of the 2013 Omnibus Incentive Compensation Plan (the "Plan") and the assumptions for the valuation of Restricted Stock Units ("RSUs") and Stock Appreciation Rights or Stock Options (collectively the "SARs") have been disclosed in Note 21 "Share-Based Compensation" in the annual audited consolidated financial statements for the year ended December 31, 2017.

        On April 2, 2018, GasLog granted to executives, managers and certain employees of the Group 149,786 RSUs and 416,458 SARs in accordance with the Plan. The RSUs will vest on April 2, 2021 while the SARs will vest incrementally with one-third of the SARs vesting on each of April 2, 2019, 2020 and 2021. The compensation cost for the SARs is recognized on an accelerated basis as though each separately vesting portion of the SARs is a separate award.

Awards	Number	Grant date	Expiry date	Exercise     price	Fair value at grant date
RSUs	149,786	April 2, 2018	n/a	n/a	$16.30
SARs	416,458	April 2, 2018	April 2, 2028	$16.30	$5.3001

        In accordance with the terms of the Plan, there are only service condition requirements. The awards will be settled in cash or in shares at the sole discretion of the compensation committee of the board of directors. These awards have been treated as equity settled because the Group has no present obligation to settle in cash. The amount to be settled for each SAR exercised is computed in each case, as the excess, if any, of the fair market value (the closing price of shares) on the exercise date over the exercise price of the SAR.

        The fair value of the SARs has been calculated based on the Modified Black-Scholes-Merton method. Expected volatility was based on historical share price volatility for the period since GasLog's initial public offering. The significant assumptions used to estimate the fair value of the SARs are set out below:

Inputs into the model
Grant date share closing price	$	16.30
Exercise price	$	16.30
Expected volatility		44.5	%
Expected term		6 years
Risk-free interest rate for the period similar to the expected term		2.61	%

Fair value

        The fair value of the RSUs was determined by using the grant date closing price of $16.30 per common unit and was not further adjusted since the holders are entitled to dividends.

Movement in RSUs and SARs during the period

        The summary of RSUs and SARs is presented below:

	Number of awards			Weighted average exercise price per share		Weighted average share price at the date of exercise		Weighted average contractual life		Aggregate fair value
RSUs
Outstanding as of January 1, 2018		425,702			—		—		1.39		5,636
Granted during the period		149,786			—		—		—		2,441
Forfeited during the period		(1,179	)		—		—		—		(14	)
Vested during the period		(86,136	)		—		—		—		(1,655	)
Outstanding as of June 30, 2018		488,173			—		—		1.63		6,408
SARs
Outstanding as of January 1, 2018		2,031,279			14.59		—		7.68		7,874
Granted during the period		416,458			—		—		—		2,207
Exercised during the period		(12,878	)		—		18.06		—		(47	)
Forfeited during the period		(3,333	)		—		—		—		(12	)
Expired during the period		(12,198	)		—		—				(72	)
Outstanding as of June 30, 2018		2,419,328			14.86		—		7.63		9,950

        As of June 30, 2018, 1,406,290 SARs have vested but have not been exercised.

        The terms of the GasLog Partners' 2015 Long-Term Incentive Plan (the "GasLog Partners' Plan") and the assumptions for the valuation of Restricted Common Units ("RCUs") and Performance Common Units ("PCUs") have been disclosed in Note 21 "Share-Based Compensation" in the annual audited consolidated financial statements for the year ended December 31, 2017.

        On April 2, 2018, GasLog Partners granted to its executives 24,608 RCUs and 24,608 PCUs in accordance with the GasLog Partners' Plan. The RCUs and PCUs will vest on April 2, 2021. The holders are entitled to cash distributions that will be accrued and settled on vesting.

Awards	Number	Grant date	Expiry date	Fair value at grant date
RCUs	24,608	April 2, 2018	n/a	$ 23.40
PCUs	24,608	April 2, 2018	n/a	$ 23.40

        In accordance with the terms of the GasLog Partners' Plan, the awards will be settled in cash or in common units at the sole discretion of the board of directors or such committee as may be designated by the board to administer the GasLog Partners' Plan. These awards have been treated as equity settled because the Partnership has no present obligation to settle them in cash.

Fair value

        The fair value of the RCUs and PCUs in accordance with the GasLog Partners' Plan was determined by using the grant date closing price of $23.40 per common unit and was not further adjusted since the holders are entitled to cash distributions.

Movement in RCUs and PCUs during the period

        The summary of RCUs and PCUs is presented below:

	Number of awards			Weighted average contractual life		Aggregate fair value
RCUs
Outstanding as of January 1, 2018		67,475			1.38		1,429
Granted during the period		24,608			—		576
Vested during the period		(16,999	)		—		(410	)
Outstanding as of June 30, 2018		75,084			1.75		1,595
PCUs
Outstanding as of January 1, 2018		67,475			1.38		1,429
Granted during the period		24,608			—		576
Vested during the period		(16,999	)		—		(410	)
Outstanding as of June 30, 2018		75,084			1.75		1,595

        On April 3, 2018, 16,999 RCUs and 16,999 PCUs vested under the GasLog Partners' Plan.

        The total expense recognized in respect of share-based compensation for the three and six months ended June 30, 2018 was $1,329 and $2,515 (for the three and six months ended June 30, 2017: $1,223 and $2,235). The total accrued cash distribution as of June 30, 2018 is $764 (December 31, 2017: $814).

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Earnings/(losses) per share ("EPS")

6 Months Ended

Jun. 30, 2018

Earnings/(losses) per share ("EPS")

Earnings/(losses) per share ("EPS")

18. Earnings/(losses) per Share ("EPS")

        Basic earnings/(losses) per share was calculated by dividing the profit for the period attributable to the owners of the common shares by the weighted average number of common shares issued and outstanding during the period.

        Diluted earnings/(losses) per share is calculated by dividing the profit for the period attributable to the owners of the Group by the weighted average number of all potential ordinary shares assumed to have been converted into common shares, unless such potential ordinary shares have an antidilutive effect.

        The following reflects the earnings/(losses) and share data used in the basic and diluted earnings/(losses) per share computations:

	For the three months ended
	June 30, 2017			June 30, 2018
Basic loss per share
Loss for the period attributable to owners of the Group		(7,515	)		(3,620	)
Plus:
Dividend on preference shares		(2,516	)		(2,516	)
Loss for the period available to owners of the Group		(10,031	)		(6,136	)
Weighted average number of shares outstanding, basic		80,624,124			80,801,654
Basic loss per share		(0.12	)		(0.08	)
Diluted loss per share
Loss for the period available to owners of the Group used in the calculation of diluted loss per share		(10,031	)		(6,136	)
Weighted average number of shares outstanding, basic		80,624,124			80,801,654
Dilutive potential ordinary shares		—			—
Weighted average number of shares used in the calculation of diluted loss per share		80,624,124			80,801,654
Diluted loss per share		(0.12	)		(0.08	)

        The Group excluded the dilutive effect of 971,911 SARs in calculating diluted EPS for the three months ended June 30, 2018, as they were anti-dilutive (June 30, 2017: 2,153,024 SARs and 438,595 RSUs).

	For the six months ended
	June 30, 2017			June 30, 2018
Basic (loss)/earnings per share
Profit for the period attributable to owners of the Group		1,237			15,684
Less:
Dividend on preference shares		(5,031	)		(5,032	)
(Loss)/profit for the period available to owners of the Group		(3,794	)		10,652
Weighted average number of shares outstanding, basic		80,592,912			80,758,631
Basic (loss)/earnings per share		(0.05	)		0.13
Diluted (loss)/earnings per share
(Loss)/profit for the period available to owners of the Group used in the calculation of diluted (loss)/earnings per share		(3,794	)		10,652
Weighted average number of shares outstanding, basic		80,592,912			80,758,631
Dilutive potential ordinary shares		—			732,041
Weighted average number of shares used in the calculation of diluted (loss)/earnings per share		80,592,912			81,490,672
Diluted (loss)/earnings per share		(0.05	)		0.13

        The Group excluded the dilutive effect of 971,911 SARs in calculating diluted EPS for the six months ended June 30, 2018, as they were anti-dilutive (June 30, 2017: 2,153,024 SARs and 438,595 RSUs).

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Subsequent Events

6 Months Ended

Jun. 30, 2018

Subsequent Events

Subsequent Events

19. Subsequent Events

        On August 1, 2018, the board of directors declared a quarterly cash dividend of $0.15 per common share payable on August 23, 2018 to shareholders of record as of August 13, 2018.

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Basis of Presentation (Policies)

6 Months Ended

Jun. 30, 2018

Basis of Presentation

Adoption of new and revised IFRS

Adoption of new and revised IFRS

(a) Standards and interpretations adopted in the current period

        In May 2014, the IASB issued IFRS 15 Revenue from Contracts with Customers which applies to all contracts with customers: the main exceptions are leases, financial instruments and insurance contracts. IFRS 15 specifies how and when an IFRS reporter will recognize revenue as well as requiring such entities to provide users of financial statements with more informative, relevant disclosures. The standard supersedes IAS 18 Revenue, IAS 11 Construction Contracts and a number of revenue-related interpretations. The standard was effective for annual periods beginning on or after January 1, 2018 and was applied by the Group using the modified retrospective approach. The adoption of the standard as of January 1, 2018 resulted in an increase of $246 on the Group's Accumulated deficit and an increase of the same amount on the Group's Other payables and accruals under the modified retrospective approach, as a result of the reassessment of the timing of the performance obligations in relation to positioning and repositioning fees and associated expenses.

        The Group assessed that under a time charter arrangement, the hire rate per the charter agreement has two components: the lease component and the service component relating to the vessel operating costs. The revenue in relation to the lease component of the agreements is accounted for under the leases standard. The revenue in relation to the service component relates to vessel operating expenses which include expenses that are paid by the vessel owner such as management fees, crew wages, provisions and stores, technical maintenance and insurance expenses. These costs are essential to operating a charter and the charterers receive the benefit of these when the vessel is used during the contracted time and, therefore, these costs will be accounted for in accordance with the requirements of IFRS 15 Revenue from Contracts with Customers.

        In relation to short-term charters under the Cool Pool, management believes mobilization of a vessel from a previous port of discharge to a subsequent port of loading does not result in a separate benefit for charterers and that the activity is thus incapable of being distinct. This activity is considered to be a required set-up activity to fulfil the contract. On that basis, it was concluded that positioning and repositioning fees and associated expenses should be recognized over the period of the contract, and not at a certain point in time.

        In July 2014, the IASB issued the complete version of IFRS 9 Financial Instruments. IFRS 9 specifies how an entity should classify and measure financial assets and financial liabilities. The new standard requires all financial assets to be subsequently measured at amortized cost or fair value depending on the business model of the legal entity in relation to the management of the financial assets and the contractual cash flows of the financial assets. The standard also requires a financial liability to be classified as either at fair value through profit or loss or at amortized cost. In addition, a new hedge accounting model was introduced, that is designed to be more closely aligned with how entities undertake risk management activities when hedging financial and non-financial risk exposures.

        When an entity first applies IFRS 9 Financial Instruments, it may choose as its accounting policy to continue to apply the hedge accounting requirements of IAS 39 Financial Instruments, Recognition and Measurement, instead of the requirements in Chapter 6 of IFRS 9 Financial Instruments. An entity shall apply that policy to all of its hedging relationships. The Group has selected to apply hedge accounting under IFRS 9 Financial Instruments.

        The Group has elected to take the transition relief as provided by IFRS 9.7.2.15 which permits an entity not to restate prior periods on initial application of IFRS 9 Financial Instruments and any adjustments to be made in the current year. The adoption of this standard as of January 1, 2018 resulted in a decrease of $436 on the Group's Accumulated deficit and an equal decrease on the Group's Reserves, as a result of the change in the accounting for the currency basis element of the cross-currency swaps ("CCS") to flow directly to the statement of profit or loss.

(b) Standards and amendments in issue not yet adopted

        At the date of authorization of these unaudited condensed consolidated financial statements, the following standards and amendments relevant to the Group were in issue but not yet effective:

        In January 2016, the IASB issued IFRS 16 Leases, which sets out the principles for the recognition, measurement, presentation and disclosure of leases for both parties to a contract, i.e., the customer ("lessee") and the supplier ("lessor"). IFRS 16 eliminates the classification of leases by lessees as either operating leases or finance leases and, instead, introduces a single lessee accounting model. Applying that model, a lessee is required to recognise: (a) assets and liabilities for all leases with a term of more than 12 months, unless the underlying asset is of low value; and (b) depreciation of lease assets separately from interest on lease liabilities in the statement of profit or loss. Lessors continue to classify their leases as operating leases or finance leases, and to account for those two types of leases differently. IFRS 16 supersedes the previous leases Standard, IAS 17 Leases, and related Interpretations. The standard is effective from January 1, 2019, with early adoption permitted only with concurrent adoption of IFRS 15 Revenue from Contracts with Customers. Management has elected not to adopt early, and it anticipates that the implementation of this standard will not have a material impact on the Group's consolidated financial statements, since the changes for lessors are fairly minor and the Group's lessee obligations are not significant.

        The impact of all other IFRS standards and amendments issued but not yet adopted is not expected to be material on the Group's unaudited condensed consolidated financial statements.

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Organization and Operations (Tables)

6 Months Ended

Jun. 30, 2018

Organization and Operations

Schedule of composition of the group's structure

As of June 30, 2018, the Group's structure is as follows:

Name	Place of incorporation	Date of incorporation	Principal activities	Cargo capacity (cbm)	Vessel	Delivery date
Subsidiaries:
GasLog Investments Ltd.	BVI	July 2003	Holding company	—	—	—
GasLog Carriers Ltd. ("GasLog Carriers")	Bermuda	February 2008	Holding company	—	—	—
GasLog Shipping Company Ltd.	Bermuda	January 2006	Holding company	—	—	—
GasLog Partners GP LLC	Marshall Islands	January 2014	Holding company	—	—	—
GasLog Cyprus Investments Ltd.	Cyprus	December 2016	Holding company	—	—	—
GasLog Services UK Ltd.	England and Wales	May 2014	Service company	—	—	—
GasLog Services US Inc.	Delaware	May 2014	Service company	—	—	—
GasLog Asia Pte Ltd.	Singapore	May 2015	Service company	—	—	—
GasLog LNG Services Ltd.	Bermuda	August 2004	Vessel management services	—	—	—
GasLog Monaco S.A.M.	Monaco	February 2010	Service company	—	—	—
GAS-one Ltd.	Bermuda	February 2008	Vessel-owning company	155,000	GasLog Savannah	May 2010
GAS-two Ltd.	Bermuda	February 2008	Vessel-owning company	155,000	GasLog Singapore	July 2010
GAS-six Ltd.	Bermuda	February 2011	Vessel-owning company	155,000	GasLog Skagen	July 2013
GAS-nine Ltd.	Bermuda	June 2011	Vessel-owning company	155,000	GasLog Saratoga	December 2014
GAS-ten Ltd.	Bermuda	June 2011	Vessel-owning company	155,000	GasLog Salem	April 2015
GAS-twelve Ltd.	Bermuda	December 2012	Vessel-owning company	174,000	GasLog Glasgow	June 2016
GAS-fifteen Ltd.	Bermuda	August 2013	Vessel-owning company	153,600	GasLog Chelsea	October 2013
GAS-eighteen Ltd.	Bermuda	January 2014	Vessel-owning company	145,000	Methane Lydon Volney	April 2014
GAS-twenty two Ltd.	Bermuda	May 2014	Vessel-owning company	174,000	GasLog Genoa	March 2018
GAS-twenty three Ltd.	Bermuda	May 2014	Vessel-owning company	174,000	Hull No. 2131	Q1 2019(1)
GAS-twenty four Ltd.	Bermuda	June 2014	Vessel-owning company	174,000	GasLog Houston	January 2018
GAS-twenty five Ltd.	Bermuda	June 2014	Vessel-owning company	174,000	GasLog Hong Kong	March 2018
GAS-twenty six Ltd.	Bermuda	January 2015	Finance lease asset company(2)	170,000	Methane Julia Louise	March 2015
GAS-twenty seven Ltd.	Bermuda	January 2015	Vessel-owning company	170,000	Methane Becki Anne	March 2015
GAS-twenty eight Ltd.	Bermuda	September 2016	Vessel-owning company	180,000	Hull No. 2213(4)	Q2 2020(1)
GAS-twenty nine Ltd.	Bermuda	September 2016	Vessel-owning company	180,000	Hull No. 2212	Q3 2019(1)
GAS-thirty Ltd.	Bermuda	December 2017	Vessel-owning company	180,000	Hull No. 2262	Q3 2020(1)
GAS-thirty one Ltd.	Bermuda	December 2017	Vessel-owning company	180,000	Hull No. 2274	Q2 2020(1)
GAS-thirty two Ltd.	Bermuda	December 2017	Dormant	—	—	—
GAS-thirty three Ltd.	Bermuda	May 2018	Dormant	—	—	—
GAS-thirty four Ltd.	Bermuda	May 2018	Dormant	—	—	—
GasLog Shipping Limited	BVI	July 2003	Dormant	—	—	—
29.1% interest subsidiaries:
GasLog Partners LP	Marshall Islands	January 2014	Holding company	—	—	—
GasLog Partners Holdings LLC	Marshall Islands	April 2014	Holding company	—	—	—
GAS-three Ltd.	Bermuda	April 2010	Vessel-owning company	155,000	GasLog Shanghai	January 2013
GAS-four Ltd.	Bermuda	April 2010	Vessel-owning company	155,000	GasLog Santiago	March 2013
GAS-five Ltd.	Bermuda	February 2011	Vessel-owning company	155,000	GasLog Sydney	May 2013
GAS-seven Ltd.	Bermuda	March 2011	Vessel-owning company	155,000	GasLog Seattle	December 2013
GAS-eight Ltd.	Bermuda	March 2011	Vessel-owning company	155,000	Solaris	June 2014
GAS-eleven Ltd.	Bermuda	December 2012	Vessel-owning company	174,000	GasLog Greece	March 2016
GAS-thirteen Ltd.	Bermuda	July 2013	Vessel-owning company	174,000	GasLog Geneva	September 2016
GAS-fourteen Ltd.	Bermuda	July 2013	Vessel-owning company	174,000	GasLog Gibraltar	October 2016
GAS-sixteen Ltd.	Bermuda	January 2014	Vessel-owning company	145,000	Methane Rita Andrea	April 2014
GAS-seventeen Ltd.	Bermuda	January 2014	Vessel-owning company	145,000	Methane Jane Elizabeth	April 2014
GAS-nineteen Ltd.	Bermuda	April 2014	Vessel-owning company	145,000	Methane Alison Victoria	June 2014
GAS-twenty Ltd.	Bermuda	April 2014	Vessel-owning company	145,000	Methane Shirley Elisabeth	June 2014
GAS-twenty one Ltd.	Bermuda	April 2014	Vessel-owning company	145,000	Methane Heather Sally	June 2014
25% interest associate:
Egypt LNG Shipping Ltd.	Bermuda	May 2010	Vessel-owning company	145,000	Methane Nile Eagle	December 2007
20% interest associate:
Gastrade S.A. ("Gastrade")	Greece	June 2010	Service company	—	—	—
33.33% joint venture:
The Cool Pool Limited (the "Cool Pool")(3)	Marshall Islands	September 2015	Service company	—	—	—

(1)	For newbuildings, expected delivery quarters as of June 30, 2018 are presented.
(2)	On February 24, 2016, GAS-twenty six Ltd. completed the sale and leaseback of theMethane Julia Louisewith a subsidiary of Mitsui Co. Ltd. ("Mitsui"). Refer to Note 6.
(3)	On October 1, 2015, GasLog Carriers, Dynagas Ltd. ("Dynagas") and Golar LNG Limited ("Golar") ("Pool Owners") and The Cool Pool Limited signed a LNG carrier pooling agreement (the "LNG Carrier Pool" or "Pool Agreement") to market their vessels, which are currently operating in the LNG shipping spot market. As of June 30, 2018, the LNG Carrier Pool—named the "Cool Pool"—consists of 17 modern, high quality and essentially equivalent vessels powered by fuel efficient tri-fuel diesel electric ("TFDE") propulsion technology. The participation of the Pool Owners' vessels in the Cool Pool is as follows: Dynagas: one vessel; GasLog: six vessels; and Golar: ten vessels. Each vessel owner continues to be fully responsible for the staffing and technical management of their respective vessels. For the operation of the Cool Pool, a Marshall Islands service company named "The Cool Pool Limited" or the "Pool Manager", was incorporated in September 2015 acting as an agent. In June and July 2018, Dynagas Ltd. removed its three vessels from the Cool Pool.
(4)	On January 12, 2018, GasLog entered into a shipbuilding contract with Samsung Heavy Industries Co. Ltd (“Samsung”) for the construction of a 180,000 cbm GTT Mark III Flex LNG Carrier with LP-2S propulsion (Hull No. 2213) that is scheduled to be delivered in the second quarter of 2020. This vessel will be the vessel to be chartered to Centrica for an initial period of approximately seven years. The 180,000 cbm GTT Mark III Flex Plus LNG Carrier with LP-2S propulsion (Hull No. 2212) to be delivered in the third quarter of 2019 is currently without charter.

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Non-controlling Interest in GasLog Partners (Tables)

6 Months Ended

Jun. 30, 2018

Non-controlling Interest in GasLog Partners

Schedule of distribution policy and profit allocation

	Marginal Percentage Interest in Distributions
	Total Quarterly Distribution Target Amount	Unitholders	General Partner	Holders of IDRs
Minimum Quarterly Distribution	$ 0.375	98.0%	2.0%	0%
First Target Distribution	$0.375 up to $0.43125	98.0%	2.0%	0%
Second Target Distribution	$0.43125 up to $0.46875	85.0%	2.0%	13.0%
Third Target Distribution	$0.46875 up to $0.5625	75.0%	2.0%	23.0%
Thereafter	Above $0.5625	50.0%	2.0%	48.0%

	For the three months ended		For the six months ended
Allocation of GasLog Partners' profit(*)	June 30, 2017	June 30, 2018	June 30, 2017	June 30, 2018
Partnership's profit attributable to:
Common unitholders	17,349	17,095	32,073	41,152
Subordinated unitholders	N/A	N/A	5,085	N/A
General partner	357	349	777	888
Incentive distribution rights ("IDRs")	103	—	896	2,368
Paid and accrued preference equity distributions	1,549	5,457	1,549	10,495
Total	19,358	22,901	40,380	54,903
Partnership's profit allocated to GasLog	4,939	5,069	11,321	13,834
Partnership's profit allocated to non-controlling interests	14,419	17,832	29,059	41,069
Total	19,358	22,901	40,380	54,903

* Excludes profits of GAS-eleven Ltd., GAS-thirteen Ltd., GAS-eight Ltd. and GAS-fourteen Ltd. for the period prior to their transfers to the Partnership on May 3, 2017, July 3, 2017, October 20, 2017 and April 26, 2018, respectively.

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Investment in Associates (Tables)

6 Months Ended

Jun. 30, 2018

Investment in Associates

Schedule of movements in investment in associates

	June 30, 2018
As of January 1, 2018	20,800
Share of profit of associates	827
Dividend declared	(1,138	)
As of June 30, 2018	20,489

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Tangible Fixed Assets, Vessels Under Construction and Vessel Held Under Finance Lease (Tables)

6 Months Ended

Jun. 30, 2018

Tangible Fixed Assets, Vessels Under Construction and Vessel Held Under Finance Lease

Schedule of movements in tangible fixed assets, vessels under construction and vessel held under finance lease

	Vessels			Office property and other tangible assets		Total tangible fixed assets			Vessels under construction			Vessel held under finance lease
Cost
As of January 1, 2018		4,217,866			19,224		4,237,090			166,655			228,523
Additions		33,225			3,758		36,983			564,211			145
Transfer from vessels under construction		639,260			—		639,260			(639,260	)		—
Transfer under "Other non-current assets"		—			—		—			(1,650	)		—
Fully amortized fixed assets		(5,000	)		—		(5,000	)		—			—
As of June 30, 2018		4,885,351			22,982		4,908,333			89,956			228,668
Accumulated depreciation
As of January 1, 2018		460,815			3,709		464,524			—			14,194
Depreciation expense		70,104			410		70,514			—			3,828
Fully amortized fixed assets		(5,000	)		—		(5,000	)		—			—
As of June 30, 2018		525,919			4,119		530,038			—			18,022
Net book value
As of December 31, 2017		3,757,051			15,515		3,772,566			166,655			214,329
As of June 30, 2018		4,359,432			18,863		4,378,295			89,956			210,646

Schedule of vessels under construction

	December 31, 2017	June 30, 2018
Progress shipyard installments	153,116	85,023
Onsite supervision costs	10,570	4,260
Critical spare parts, equipment and other vessel delivery expenses	2,969	673
Total	166,655	89,956

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Sale and Leaseback (Tables)

6 Months Ended

Jun. 30, 2018

Sale and Leaseback

Schedule of movements in finance lease liabilities

	December 31, 2017	June 30, 2018
Finance lease liability, current portion	6,302	6,485
Finance lease liability, non-current portion	207,126	203,355
Total	213,428	209,840

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Borrowings (Tables)

6 Months Ended

Jun. 30, 2018

Borrowings

Schedule of borrowings

	December 31, 2017		June 30, 2018
Amounts due within one year	188,167		193,709
Less: unamortized deferred loan/bond issuance costs	(8,800	)	(11,153	)
Borrowings, current portion	179,367		182,556
Amounts due after one year	2,399,849		2,784,651
Less: unamortized deferred loan/bond issuance costs	(31,660	)	(42,396	)
Borrowings, non-current portion	2,368,189		2,742,255
Total	2,547,556		2,924,811

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Related Party Transactions (Tables)

6 Months Ended

Jun. 30, 2018

Related Party Transactions

Schedule of balances with related parties

	December 31, 2017		June 30, 2018
Dividends receivable from associate		125		763
Due from The Cool Pool Limited		8,186		6,997
Other receivables		355		315
Total		8,666		8,075

	December 31, 2017		June 30, 2018
Ship management creditors		993		450
Amounts due to related parties		35		72

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Revenues from Contracts with Customers (Tables)

6 Months Ended

Jun. 30, 2018

Revenues from Contracts with Customers

Schedule of revenues from Contracts with Customers

	For the three months ended				For the six months ended
	June 30, 2017		June 30, 2018		June 30, 2017		June 30, 2018
Revenues from time charters		121,581		127,573		242,283		252,467
Revenues from The Cool Pool Limited (GasLog vessels)		8,023		5,047		15,378		18,452
Revenues from vessel management services		326		204		554		383
Total		129,930		132,824		258,215		271,302

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General and Administrative Expenses (Tables)

6 Months Ended

Jun. 30, 2018

General and Administrative Expenses

Schedule of general and administrative expenses

	For the three months ended					For the six months ended
	June 30, 2017			June 30, 2018		June 30, 2017			June 30, 2018
Employee costs		4,403			4,677		9,614			11,628
Board of directors' fees		542			622		1,103			1,344
Share-based compensation		1,223			1,329		2,235			2,515
Rent and utilities		541			570		1,144			1,086
Travel and accommodation		555			701		1,050			1,033
Legal and professional fees		2,393			1,704		3,955			3,326
Foreign exchange differences, net		(84	)		63		(39	)		(241	)
Other expenses		673			686		1,163			1,674
Total		10,246			10,352		20,225			22,365

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Other Payables and Accruals (Tables)

6 Months Ended

Jun. 30, 2018

Other Payables and Accruals

Schedule of other payables and accruals

	December 31, 2017		June 30, 2018
Social contributions		1,244		797
Unearned revenue		34,926		41,089
Accrued legal and professional fees		1,567		994
Accrued board of directors' fees		577		622
Accrued employee costs		5,494		5,156
Accrued off-hire		5,284		7,926
Accrued crew costs		4,027		3,898
Accrued purchases		4,227		17,289
Accrued financing costs		1,984		36
Accrued interest		27,851		34,681
Accrued payable to charterers		4,179		5,859
Other accruals		2,058		2,218
Total		93,418		120,565

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Share Capital and Preference Shares (Tables)

6 Months Ended

Jun. 30, 2018

Share Capital and Preference Shares

Schedule of the movements in the number of shares, the share capital, the Preference Shares, the contributed surplus and the treasury shares

	Number of Shares								Amounts
	Number of Common Shares			Number of Treasury Shares			Number of Preference Shares		Share capital		Preference Shares		Contributed surplus			Treasury Shares
Outstanding as of January 1, 2018		80,717,885			275,241			4,600,000		810		46		911,766			(6,960	)
Treasury shares, net		(2,818	)		2,818			—		—		—		—			(62	)
Treasury shares distributed for awards vested or exercised in the period		99,014			(99,014	)		—		—		—		—			2,550
Dividends declared deducted from Contributed surplus due to accumulated deficit		—			—			—		—		—		(28,452	)		—
Outstanding as of June 30, 2018		80,814,081			179,045			4,600,000		810		46		883,314			(4,472	)

XML

Commitments and Contingencies (Tables)

6 Months Ended

Jun. 30, 2018

Commitments and Contingencies

Schedule of commitments as lessee relating to buildings under operating leases

Period	June 30, 2018
Not later than one year		1,185
Later than one year and not later than three years		1,382
Later than three years and not later than five years		565
Total		3,132

Schedule of commitments relating to vessels under construction

Period	June 30, 2018
Not later than one year		255,568
Later than one year and not later than three years		620,310
Total		875,878

Schedule of future gross minimum revenues receivable upon collection of hire under non-cancellable time charter agreements

Period	June 30, 2018
Not later than one year		411,409
Later than one year and not later than three years		639,397
Later than three years and not later than five years		425,591
More than five years		499,041
Total		1,975,438

Schedule of commitments relating to group vessels agreement

Period	June 30, 2018
Not later than one year		11,142
Total		11,142

Schedule of commitments relating to engineering agreements for FSRU conversion of one vessel

Period	June 30, 2018
Not later than one year		3,787
Total		3,787

XML

Derivative Financial Instruments (Tables)

6 Months Ended

Jun. 30, 2018

Derivative Financial Instruments

Schedule of fair value of the derivative assets

	December 31, 2017		June 30, 2018
Derivative assets carried at fair value through profit or loss (FVTPL)
Interest rate swaps		11,535		31,629
Forward foreign exchange contracts		2,123		101
Derivative assets designated and effective as hedging instruments carried at fair value
Cross currency swaps		4,553		5,916
Total		18,211		37,646
Derivative financial instruments, current assets		2,199		6,206
Derivative financial instruments, non-current assets		16,012		31,440
Total		18,211		37,646

Schedule of fair value of the derivative liabilities

	December 31, 2017		June 30, 2018
Derivative liabilities designated and effective as hedging instruments carried at fair value
Cross currency swaps		605		212
Derivative liabilities carried at fair value through profit or loss (FVTPL)
Interest rate swaps		1,210		1,152
Forward foreign exchange contracts		—		894
Total		1,815		2,258
Derivative financial instruments, current liability		1,815		1,109
Derivative financial instruments, non-current liability		—		1,149
Total		1,815		2,258

Schedule of principal terms of the forward foreign exchange contracts held for trading

Company	Counterparty	Trade Date	Number of Contracts	Settlement Dates	Fixed Exchange Rate (USD/GBP)	Total Exchange Amount (in thousands)
GasLog	SEB	August 2017	6	July-December 2018	1.3042	£1,800
					Total	£1,800

Company	Counterparty	Trade Date	Number of Contracts	Settlement Dates	Fixed Exchange Rate (USD/EUR)	Total Exchange Amount (in thousands)
GasLog	Nordea Bank Finland	August 2017	6	July-December 2018	1.1986	€4,500
GasLog	SEB	August 2017	6	July-December 2018	1.1966	€6,000
GasLog	DNB	October 2017	1	July 2018	1.1746	€1,995
GasLog	Citibank	November 2017	1	July 2018	1.2023	€2,000
GasLog	Citibank	November 2017	1	August 2018	1.2048	€2,000
GasLog	Citibank	November 2017	1	September 2018	1.2072	€2,000
GasLog	Citibank	November 2017	1	October 2018	1.2099	€2,000
GasLog	Citibank	November 2017	1	November 2018	1.2123	€2,000
GasLog	Citibank	November 2017	1	December 2018	1.2148	€2,000
GasLog	Citibank	May 2018	1	July 2018	1.1758	€1,000
GasLog	Citibank	May 2018	1	August 2018	1.1786	€1,000
GasLog	Citibank	May 2018	1	September 2018	1.1816	€1,000
GasLog	Citibank	May 2018	1	October 2018	1.1844	€1,000
GasLog	Citibank	May 2018	1	November 2018	1.1875	€1,000
GasLog	Citibank	May 2018	1	December 2018	1.1905	€1,000
GasLog	SEB	May 2018	6	July-December 2018	1.1831	€6,000
GasLog	HSBC	May 2018	6	July-December 2018	1.1847	€3,000
GasLog	Citibank	May 2018	1	January 2019	1.1954	€2,500
GasLog	Citibank	May 2018	1	February 2019	1.1983	€2,500
GasLog	Citibank	May 2018	1	March 2019	1.2012	€2,500
GasLog	SEB	May 2018	3	January-March 2019	1.1984	€7,500
GasLog	ABN	June 2018	1	April 2019	1.1903	€2,500
GasLog	ABN	June 2018	1	May 2019	1.1936	€2,500
GasLog	ABN	June 2018	1	June 2019	1.1968	€2,500
GasLog	DNB	June 2018	1	April 2019	1.1910	€2,500
GasLog	DNB	June 2018	1	May 2019	1.1943	€2,500
GasLog	DNB	June 2018	1	June 2019	1.1975	€2,500
					Total	€69,495

Interest rate swaps held for trading

Derivative Financial Instruments

Schedule of principal terms of the hedging instruments

							Notional Amount
Company		Counterparty	Trade Date	Effective Date	Termination Date	Fixed Interest Rate	December 31, 2017		June 30, 2018
GasLog		Deutsche Bank AG	July 2016	July 2016	July 2020	1.98%		66,667		66,667
GasLog		Deutsche Bank AG	July 2016	July 2016	July 2021	1.98%		66,667		66,667
GasLog		Deutsche Bank AG	July 2016	July 2016	July 2022	1.98%		66,667		66,667
GasLog		DNB Bank ASA ("DNB")	July 2016	July 2016	July 2020	1.784%		73,333		73,333
GasLog (1)		DNB	July 2016	July 2016	July 2021	1.729%		73,333		73,333
GasLog		DNB	July 2016	July 2016	July 2022	1.719%		73,333		73,333
GasLog (3)		HSBC Bank plc ("HSBC")	July 2016	July 2016	July 2020	1.896%		33,333		—
GasLog (3)		HSBC	July 2016	July 2016	July 2021	1.818%		33,333		—
GasLog		HSBC	July 2016	July 2016	July 2022	1.79%		33,333		33,333
GasLog		Nordea Bank Finland	July 2016	July 2016	July 2020	1.905%		66,667		66,667
GasLog (2)		Nordea Bank Finland	July 2016	July 2016	July 2021	1.84%		66,667		—
GasLog		Nordea Bank Finland	July 2016	July 2016	July 2022	1.815%		66,667		66,667
GasLog		Skandinavinska Enskilda Banken AB ("SEB")	July 2016	July 2016	July 2020	1.928%		50,000		50,000
GasLog		SEB	July 2016	July 2016	July 2021	1.8405%		50,000		50,000
GasLog (3)		SEB	July 2016	July 2016	July 2022	1.814%		50,000		—
GasLog		HSBC	Feb 2017	Feb 2017	Feb 2022	2.005%		100,000		100,000
GasLog		Nordea Bank Finland	Feb 2017	Feb 2017	Mar 2022	2.0145%		100,000		100,000
GasLog		ABN Amro Bank NV ("ABN")	Feb 2017	Feb 2017	Mar 2022	2.003%		100,000		100,000
GasLog (4)		Nordea Bank Finland	May 2018	July 2020	July 2026	3.070%		—		N/A
GasLog (2)		Nordea Bank Finland	May 2018	May 2018	July 2026	2.562%		—		66,667
GasLog (4)		SEB	May 2018	July 2020	July 2024	3.025%		—		N/A
GasLog (3)		SEB	May 2018	Apr 2018	July 2025	2.300%		—		50,000
GasLog (4)		DNB	May 2018	July 2020	July 2024	3.056%		—		N/A
GasLog (1)		DNB	May 2018	July 2018	July 2025	2.472%		—		N/A
GasLog (3)		HSBC	May 2018	Apr 2018	July 2024	2.475%		—		33,333
GasLog (3)		HSBC	May 2018	Apr 2018	July 2025	2.550%		—		33,333
GasLog (4)		Citibank Europe Plc. ("CITI")	May 2018	July 2020	July 2024	3.082%		—		N/A
GasLog (4)		CITI	May 2018	July 2021	July 2025	3.095%		—		N/A
						Total		1,170,000		1,170,000
(1)	In May 2018, the Group terminated an interest rate swap originally maturing in July 2021 with an effective date of July 2018. This swap was subsequently replaced with a new swap of the same notional amount of $73,333 with an effective date of July 2018 and a new maturity date of July 2025.
(2)	Effective May 2018, the Group terminated the interest rate swap originally maturing in July 2021 and replaced with a new swap of the same notional amount of $66,667 maturing in July 2026.
(3)	Effective May 2018, the Group terminated the interest rate swap with SEB originally maturing in July 2022 and replaced with a new swap of the same notional amount of $50,000 with an effective date of April 2018 and a new maturity date of July 2025. In addition, in May 2018, the Group terminated the interest rate swap agreements with HSBC with an aggregate notional value of $66,666 and entered into new agreements of the same notional amounts with an effective date April 2018.
(4)	In May 2018, the Group entered into new interest rate swap agreements with various counterparties with an aggregate notional value of $250,000, with effective dates in July 2020 and July 2021, maturing between 2024 and 2026.

Cross currency swaps qualified as cash flow hedging instruments

Derivative Financial Instruments

Schedule of principal terms of the hedging instruments

						Notional Amount
Company	Counterparty	Trade Date	Effective Date	Termination Date	Fixed Interest Rate	December 31, 2017		June 30, 2018
GasLog	DNB	June 2016	June 2016	May 2021	8.59%		30,050		30,050
GasLog	SEB	June 2016	June 2016	May 2021	8.59%		30,050		30,050
GasLog	Nordea Bank Finland	June 2016	June 2016	May 2021	8.59%		30,050		30,050
					Total		90,150		90,150

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Financial Costs and (Loss)/Gain on Derivatives (Tables)

6 Months Ended

Jun. 30, 2018

Financial Costs and (Loss)/Gain on Derivatives

Schedule of financial costs and (loss)/gain on derivatives

	For the three months ended						For the six months ended
	June 30, 2017			June 30, 2018			June 30, 2017			June 30, 2018
Amortization and write off of deferred loan/bond issuance costs and premium		(2,978	)		(3,232	)		(6,437	)		(6,144	)
Interest expense on loans		(21,099	)		(28,066	)		(43,581	)		(51,263	)
Interest expense on bonds and realized loss on cross-currency swaps		(8,451	)		(7,442	)		(11,971	)		(14,915	)
Finance lease charge		(2,722	)		(2,634	)		(5,436	)		(5,262	)
Loss arising on NOK bond repurchase at a premium		(1,459	)		—			(1,459	)		—
Other financial costs		(369	)		(626	)		(718	)		(1,013	)
Total financial costs		(37,078	)		(42,000	)		(69,602	)		(78,597	)
Unrealized (loss)/gain on derivative financial instruments held for trading (Note 14)		(3,487	)		74			(1,172	)		17,235
Realized (loss)/gain on interest rate swaps held for trading		(2,226	)		1,003			(4,377	)		390
Recycled loss of cash flow hedges reclassified to profit or loss		(4,368	)		—			(4,368	)		—
Realized gain on forward foreign exchange contracts held for trading		361			357			195			1,843
Ineffective portion of cash flow hedges		—			(267	)		—			(530	)
Total (loss)/gain on derivatives		(9,720	)		1,167			(9,722	)		18,938

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Cash Flow Reconciliations (Tables)

6 Months Ended

Jun. 30, 2018

Cash Flow Reconciliations

Schedule of reconciliation of borrowings arising from financing activities

	Opening balance		Cash flows		Other comprehensive income		Non-cash items		Deferred financing costs, assets		Total
Borrowings outstanding as of January 1, 2018		2,547,556		—		—		—		—		2,547,556
Proceeds from bank loans and bonds		—		498,225		—		—		—		498,225
Bank loan and bond repayments		—		(108,958)		—		—		—		(108,958)
Additions in deferred loan fees		—		(7,295)		—		1,447		(13,385)		(19,233)
Amortization of deferred loan issuance costs and premium (Note 15)		—		—		—		6,144		—		6,144
Retranslation of the NOK Bonds in U.S. dollars		—		—		1,077		—		—		1,077
Borrowings outstanding as of June 30, 2018		2,547,556		381,972		1,077		7,591		(13,385)		2,924,811

Schedule of reconciliation of derivatives arising from financing activities

	Opening balance		Other comprehensive income		Non-cash items		Total
Net derivative assets as of January 1, 2018		(16,396)		—		—		(16,396)
Unrealized gain on derivative financial instruments held for trading (Note 15)		—		—		(17,235)		(17,235)
Ineffective portion of cash flow hedges (Note 15)		—		—		530		530
Effective portion of changes in the fair value of derivatives designated as cash flow hedging instruments		—		(2,287)		—		(2,287)
Net derivative assets as of June 30, 2018		(16,396)		(2,287)		(16,705)		(35,388)

Schedule of reconciliation of tangible fixed assets, vessels under construction and vessel held under finance lease arising from investing activities

	Opening balance		Cash flows		Non-cash items		Total
Tangible fixed assets, vessels under construction and vessel held under finance lease as of January 1, 2018		4,153,550		—		—		4,153,550
Additions (Note 5)		—		588,929		12,410		601,339
Transfer under "Other non-current assets"		—		—		(1,650)		(1,650)
Depreciation expense (Note 5)		—		—		(74,342)		(74,342)
Tangible fixed assets vessels under construction and vessel held under finance lease as of June 30, 2018		4,153,550		588,929		(63,582)		4,678,897

Schedule of reconciliation of finance lease liabilities arising from financing activities

	Opening balance		Cash flows		Non-cash items		Total
Finance lease liabilities as of January 1, 2018		213,428		—		—		213,428
Finance lease charge (Note 15)		—		—		5,262		5,262
Payments for interest		—		(5,262)		—		(5,262)
Payments for finance lease liability		—		(3,588)		—		(3,588)
Finance lease liabilities as of June 30, 2018		213,428		(8,850)		5,262		209,840

Schedule of reconciliation of equity offerings arising from financing activities

	Cash flows		Non-cash items		Total
Proceeds from GasLog Partners' preference unit offerings (net of underwriting discounts and commissions)		111,544		—		111,544
Proceeds from public offerings and private placement (net of underwriting discounts and commissions)		24		—		24
Offering costs		(660)		276		(384)
Net proceeds from equity offerings in the period ended June 30, 2018		110,908		276		111,184

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Share-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2018

The Plan

Share-Based Compensation

Summary of awards granted

Awards	Number	Grant date	Expiry date	Exercise     price	Fair value at grant date
RSUs	149,786	April 2, 2018	n/a	n/a	$16.30
SARs	416,458	April 2, 2018	April 2, 2028	$16.30	$5.3001

SARs

Share-Based Compensation

Summary of significant assumptions used to estimate the fair value

Inputs into the model
Grant date share closing price	$	16.30
Exercise price	$	16.30
Expected volatility		44.5	%
Expected term		6 years
Risk-free interest rate for the period similar to the expected term		2.61	%

Summary of activity

	Number of awards			Weighted average exercise price per share		Weighted average share price at the date of exercise		Weighted average contractual life		Aggregate fair value
SARs
Outstanding as of January 1, 2018		2,031,279			14.59		—		7.68		7,874
Granted during the period		416,458			—		—		—		2,207
Exercised during the period		(12,878	)		—		18.06		—		(47	)
Forfeited during the period		(3,333	)		—		—		—		(12	)
Expired during the period		(12,198	)		—		—				(72	)
Outstanding as of June 30, 2018		2,419,328			14.86		—		7.63		9,950

RSUs

Share-Based Compensation

Summary of activity

	Number of awards			Weighted average exercise price per share		Weighted average share price at the date of exercise		Weighted average contractual life		Aggregate fair value
RSUs
Outstanding as of January 1, 2018		425,702			—		—		1.39		5,636
Granted during the period		149,786			—		—		—		2,441
Forfeited during the period		(1,179	)		—		—		—		(14	)
Vested during the period		(86,136	)		—		—		—		(1,655	)
Outstanding as of June 30, 2018		488,173			—		—		1.63		6,408

GasLog Partners' Plan

Share-Based Compensation

Summary of awards granted

Awards	Number	Grant date	Expiry date	Fair value at grant date
RCUs	24,608	April 2, 2018	n/a	$ 23.40
PCUs	24,608	April 2, 2018	n/a	$ 23.40

RCUs

Share-Based Compensation

Summary of activity

	Number of awards			Weighted average contractual life		Aggregate fair value
RCUs
Outstanding as of January 1, 2018		67,475			1.38		1,429
Granted during the period		24,608			—		576
Vested during the period		(16,999	)		—		(410	)
Outstanding as of June 30, 2018		75,084			1.75		1,595

PCUs

Share-Based Compensation

Summary of activity

	Number of awards			Weighted average contractual life		Aggregate fair value
PCUs
Outstanding as of January 1, 2018		67,475			1.38		1,429
Granted during the period		24,608			—		576
Vested during the period		(16,999	)		—		(410	)
Outstanding as of June 30, 2018		75,084			1.75		1,595

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Earnings/(losses) per share ("EPS") (Tables)

6 Months Ended

Jun. 30, 2018

Earnings/(losses) per share ("EPS")

Schedule of earnings/(losses) per share

	For the three months ended
	June 30, 2017			June 30, 2018
Basic loss per share
Loss for the period attributable to owners of the Group		(7,515	)		(3,620	)
Plus:
Dividend on preference shares		(2,516	)		(2,516	)
Loss for the period available to owners of the Group		(10,031	)		(6,136	)
Weighted average number of shares outstanding, basic		80,624,124			80,801,654
Basic loss per share		(0.12	)		(0.08	)
Diluted loss per share
Loss for the period available to owners of the Group used in the calculation of diluted loss per share		(10,031	)		(6,136	)
Weighted average number of shares outstanding, basic		80,624,124			80,801,654
Dilutive potential ordinary shares		—			—
Weighted average number of shares used in the calculation of diluted loss per share		80,624,124			80,801,654
Diluted loss per share		(0.12	)		(0.08	)

	For the six months ended
	June 30, 2017			June 30, 2018
Basic (loss)/earnings per share
Profit for the period attributable to owners of the Group		1,237			15,684
Less:
Dividend on preference shares		(5,031	)		(5,032	)
(Loss)/profit for the period available to owners of the Group		(3,794	)		10,652
Weighted average number of shares outstanding, basic		80,592,912			80,758,631
Basic (loss)/earnings per share		(0.05	)		0.13
Diluted (loss)/earnings per share
(Loss)/profit for the period available to owners of the Group used in the calculation of diluted (loss)/earnings per share		(3,794	)		10,652
Weighted average number of shares outstanding, basic		80,592,912			80,758,631
Dilutive potential ordinary shares		—			732,041
Weighted average number of shares used in the calculation of diluted (loss)/earnings per share		80,592,912			81,490,672
Diluted (loss)/earnings per share		(0.05	)		0.13

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Organization and Operations - General information (Details)	6 Months Ended
	Jun. 30, 2018
Organization and Operations
Beneficial interest owned by chairman (in percent)	40.11%
GasLog Partners LP
Organization and Operations
GasLog's ownership interest in GasLog Partners (in percent)	29.10%
General partner interest in GasLog Partners	2.00%

XML

Organization and Operations - Composition of the group (Details)			6 Months Ended
		Feb. 09, 2017	Jun. 30, 2018 item m³
Organization and Operations
Ownership interest in subsidiary (in percent)			100.00%
Number of owned LNG carriers operating in the Cool Pool | item			6
The Cool Pool Limited / Joint venture
Organization and Operations
Ownership interest in joint venture (in percent)			33.33%
LNG Cargo capacity (in cbm) per vessel	[1]		0
Number of LNG carriers operating in the Cool Pool | item			17
Dynagas - Cool Pool participant
Organization and Operations
Number of vessels removed from Cool Pool | item			3
Number of owned LNG carriers operating in the Cool Pool | item			1
Golar - Cool Pool participant
Organization and Operations
Number of owned LNG carriers operating in the Cool Pool | item			10
Egypt LNG Shipping Ltd / Associate
Organization and Operations
Ownership interest in associate (in percent)			25.00%
LNG Cargo capacity (in cbm) per vessel			145,000
Gastrade
Organization and Operations
Ownership interest in associate (in percent)		20.00%
GAS-one Ltd
Organization and Operations
LNG Cargo capacity (in cbm) per vessel			155,000
GAS-two Ltd
Organization and Operations
LNG Cargo capacity (in cbm) per vessel			155,000
GAS-six Ltd
Organization and Operations
LNG Cargo capacity (in cbm) per vessel			155,000
GAS-nine Ltd
Organization and Operations
LNG Cargo capacity (in cbm) per vessel			155,000
GAS-ten Ltd
Organization and Operations
LNG Cargo capacity (in cbm) per vessel			155,000
GAS-twelve Ltd
Organization and Operations
LNG Cargo capacity (in cbm) per vessel			174,000
GAS-fifteen Ltd
Organization and Operations
LNG Cargo capacity (in cbm) per vessel			153,600
GAS-eighteen Ltd
Organization and Operations
LNG Cargo capacity (in cbm) per vessel			145,000
GAS-twenty two Ltd
Organization and Operations
LNG Cargo capacity (in cbm) per vessel			174,000
GAS-twenty three Ltd
Organization and Operations
LNG Cargo capacity (in cbm) per vessel	[2]		174,000
GAS-twenty four Ltd.
Organization and Operations
LNG Cargo capacity (in cbm) per vessel			174,000
GAS-twenty five Ltd.
Organization and Operations
LNG Cargo capacity (in cbm) per vessel			174,000
GAS-twenty six Ltd
Organization and Operations
LNG Cargo capacity (in cbm) per vessel	[3]		170,000
GAS-twenty seven Ltd
Organization and Operations
LNG Cargo capacity (in cbm) per vessel			170,000
GAS-twenty eight Ltd.
Organization and Operations
LNG Cargo capacity (in cbm) per vessel	[2],[4]		180,000
Number years the vessel is to be chartered			7 years
GAS-twenty nine Ltd
Organization and Operations
LNG Cargo capacity (in cbm) per vessel	[2]		180,000
GAS-thirty Ltd.
Organization and Operations
LNG Cargo capacity (in cbm) per vessel	[2]		180,000
GAS-thirty one Ltd.
Organization and Operations
LNG Cargo capacity (in cbm) per vessel	[2]		180,000
29.1% interest subsidiaries
Organization and Operations
Ownership interest in subsidiary (in percent)			29.10%
GAS-three Ltd
Organization and Operations
LNG Cargo capacity (in cbm) per vessel			155,000
GAS-four Ltd
Organization and Operations
LNG Cargo capacity (in cbm) per vessel			155,000
GAS-five Ltd
Organization and Operations
LNG Cargo capacity (in cbm) per vessel			155,000
GAS-seven Ltd
Organization and Operations
LNG Cargo capacity (in cbm) per vessel			155,000
GAS-eight Ltd
Organization and Operations
LNG Cargo capacity (in cbm) per vessel			155,000
GAS-eleven Ltd
Organization and Operations
LNG Cargo capacity (in cbm) per vessel			174,000
GAS-thirteen Ltd
Organization and Operations
LNG Cargo capacity (in cbm) per vessel			174,000
GAS-fourteen Ltd
Organization and Operations
LNG Cargo capacity (in cbm) per vessel			174,000
GAS-sixteen Ltd
Organization and Operations
LNG Cargo capacity (in cbm) per vessel			145,000
GAS-seventeen Ltd
Organization and Operations
LNG Cargo capacity (in cbm) per vessel			145,000
GAS-nineteen Ltd
Organization and Operations
LNG Cargo capacity (in cbm) per vessel			145,000
GAS-twenty Ltd
Organization and Operations
LNG Cargo capacity (in cbm) per vessel			145,000
GAS-twenty one Ltd
Organization and Operations
LNG Cargo capacity (in cbm) per vessel			145,000

[1] On October 1, 2015, GasLog Carriers, Dynagas Ltd. (“Dynagas”) and Golar LNG Limited (“Golar”) ("Pool Owners") and The Cool Pool Limited signed a LNG carrier pooling agreement (the “LNG Carrier Pool” or “Pool Agreement”) to market their vessels, which are currently operating in the LNG shipping spot market. As of June 30, 2018, the LNG Carrier Pool - named the “Cool Pool” - consists of 17 modern, high quality and essentially equivalent vessels powered by fuel efficient tri-fuel diesel electric (“TFDE”) propulsion technology. The participation of the Pool Owners’ vessels in the Cool Pool is as follows: Dynagas: one vessel; GasLog: six vessels; and Golar: ten vessels.

[2] For newbuildings, expected delivery quarters as of June 30, 2018 are presented.

[3] On February 24, 2016, GAS-twenty six Ltd. completed the sale and leaseback of the Methane Julia Louise with a subsidiary of Mitsui Co. Ltd. (“Mitsui”). Refer to Note 6.

[4] On January 12, 2018, GasLog entered into a shipbuilding contract with Samsung Heavy Industries Co. Ltd (“Samsung”) for the construction of a 180,000 cbm GTT Mark III Flex LNG Carrier with LP-2S propulsion (Hull No. 2213) that is scheduled to be delivered in the second quarter of 2020. This vessel will be the vessel to be chartered to Centrica for an initial period of approximately seven years. The 180,000 cbm GTT Mark III Flex Plus LNG Carrier with LP-2S propulsion (Hull No. 2212) to be delivered in the third quarter of 2019 is currently without charter

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Basis of Presentation (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2018 USD ($)
Increase (decrease) of accumulated deficit due to adoption of new IFRS	$ (246)	[1]
Increase (decrease) due to application of IFRS 15
Increase (decrease) of accumulated deficit due to adoption of new IFRS	246
Increase (decrease) due to application of IFRS 9
Increase (decrease) of accumulated deficit due to adoption of new IFRS	$ (436)

[1] Adjusted so as to reflect certain amendments introduced due to the adoption of IFRS 15 Revenue from Contracts with Customers and IFRS 9 Financial Instruments, which became effective on January 1, 2018 (Note 2).

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Non-controlling Interest in GasLog Partners - Issuances (Details) - GasLog Partners LP - USD ($) $ / shares in Units, $ in Thousands		6 Months Ended
	Jan. 17, 2018	Jun. 30, 2018
Equity Transactions
General partners interest (in percent)		2.00%
Preference Units/Shares
Equity Transactions
Units/Shares issued to underwriters	4,600,000
Net proceeds after deducting underwriting discounts, commissions and other offering expenses	$ 111,194
Distribution rate	8.20%
Liquidation preference per share/unit (in dollars per share/unit)	$ 25.00
Over allotment | Preference Units/Shares
Equity Transactions
Units/Shares issued to underwriters	600,000

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Non-controlling Interest in GasLog Partners - Distribution Policy (Details) - Non-controlling interests	6 Months Ended
	Jun. 30, 2018 $ / shares
Minimum Quarterly Distribution
Total quarterly distribution target amount (in dollars per share)	$ 0.375
Minimum Quarterly Distribution | Common units
The percentage allocations of the quarterly distribution(as a percent)	98.00%
Minimum Quarterly Distribution | General partner units
The percentage allocations of the quarterly distribution(as a percent)	2.00%
Minimum Quarterly Distribution | Incentive distribution rights ("IDRs")
The percentage allocations of the quarterly distribution(as a percent)	0.00%
First Target Distribution | Minimum
Total quarterly distribution target amount (in dollars per share)	$ 0.375
First Target Distribution | Maximum
Total quarterly distribution target amount (in dollars per share)	$ 0.43125
First Target Distribution | Common units
The percentage allocations of the quarterly distribution(as a percent)	98.00%
First Target Distribution | General partner units
The percentage allocations of the quarterly distribution(as a percent)	2.00%
First Target Distribution | Incentive distribution rights ("IDRs")
The percentage allocations of the quarterly distribution(as a percent)	0.00%
Second Target Distribution | Minimum
Total quarterly distribution target amount (in dollars per share)	$ 0.43125
Second Target Distribution | Maximum
Total quarterly distribution target amount (in dollars per share)	$ 0.46875
Second Target Distribution | Common units
The percentage allocations of the quarterly distribution(as a percent)	85.00%
Second Target Distribution | General partner units
The percentage allocations of the quarterly distribution(as a percent)	2.00%
Second Target Distribution | Incentive distribution rights ("IDRs")
The percentage allocations of the quarterly distribution(as a percent)	13.00%
Third Target Distribution | Minimum
Total quarterly distribution target amount (in dollars per share)	$ 0.46875
Third Target Distribution | Maximum
Total quarterly distribution target amount (in dollars per share)	$ 0.5625
Third Target Distribution | Common units
The percentage allocations of the quarterly distribution(as a percent)	75.00%
Third Target Distribution | General partner units
The percentage allocations of the quarterly distribution(as a percent)	2.00%
Third Target Distribution | Incentive distribution rights ("IDRs")
The percentage allocations of the quarterly distribution(as a percent)	23.00%
Thereafter | Minimum
Total quarterly distribution target amount (in dollars per share)	$ 0.5625
Thereafter | Common units
The percentage allocations of the quarterly distribution(as a percent)	50.00%
Thereafter | General partner units
The percentage allocations of the quarterly distribution(as a percent)	2.00%
Thereafter | Incentive distribution rights ("IDRs")
The percentage allocations of the quarterly distribution(as a percent)	48.00%

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Non-controlling Interest in GasLog Partners - Allocation of GasLog Partners' Profit (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Allocation of GasLog Partners' profit
Profit for the period	$ 14,212	$ 6,904	$ 56,753	$ 30,296
Profit/(loss) for the period available to owners of the Group	(3,620)	(7,515)	15,684	1,237
Profit for the period allocated to non-controlling interests	17,832	14,419	41,069	29,059
GasLog Partners LP
Allocation of GasLog Partners' profit
Profit for the period	22,901	19,358	54,903	40,380
Profit/(loss) for the period available to owners of the Group	5,069	4,939	13,834	11,321
Profit for the period allocated to non-controlling interests	17,832	14,419	41,069	29,059
GasLog Partners LP | Common units
Allocation of GasLog Partners' profit
Profit for the period	17,095	17,349	41,152	32,073
GasLog Partners LP | Subordinated units
Allocation of GasLog Partners' profit
Profit for the period				5,085
GasLog Partners LP | General partner units
Allocation of GasLog Partners' profit
Profit for the period	349	357	888	777
GasLog Partners LP | Incentive distribution rights ("IDRs")
Allocation of GasLog Partners' profit
Profit for the period		103	2,368	896
GasLog Partners LP | Paid and accrued preference equity distributions
Allocation of GasLog Partners' profit
Profit for the period	$ 5,457	$ 1,549	$ 10,495	$ 1,549

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Investment in Associates (Details) - USD ($) $ in Thousands		6 Months Ended
	Feb. 09, 2017	Jun. 30, 2018
Rollforward of investment in associate and joint venture
Beginning balance		$ 20,800
Ending balance		20,489
Associates
Rollforward of investment in associate and joint venture
Beginning balance		20,800
Share of profit of associates		827
Dividend declared		(1,138)
Ending balance		$ 20,489
Gastrade
Rollforward of investment in associate and joint venture
Equity interest in Associate (as a percent)	20.00%

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Tangible Fixed Assets, Vessels Under Construction and Vessel Held Under Finance Lease (Details) $ in Thousands			1 Months Ended						6 Months Ended	12 Months Ended
	Jul. 10, 2017 item	Mar. 21, 2017 item	May 31, 2018 item m³	Mar. 31, 2018 item m³	Jan. 31, 2018 USD ($) item m³	Sep. 30, 2016 item m³	Jun. 30, 2014 item m³	May 31, 2014 item m³	Jun. 30, 2018 USD ($)	Dec. 31, 2017 USD ($)
Tangible fixed assets
Balance, at the beginning of the period					$ 3,772,566				$ 3,772,566
Balance, at the end of the period									4,378,295	$ 3,772,566
Vessels pledged as collateral									4,359,432	3,757,051
Advance payments made to shipyard for vessels under construction									85,000
Progress shipyard installments									85,023	153,116
Onsite supervision costs									4,260	10,570
Critical spare parts, equipment and other vessel delivery expenses									673	2,969
Total									89,956	166,655
HOA with Samsung
Tangible fixed assets
Number of vessels under FSRU conversion | item		1
Amount paid for potential conversion of existing vessel									3,400
Agreement with Keppel
Tangible fixed assets
Number of vessels under FSRU conversion | item	1
Amount paid for potential conversion of existing vessel									4,265
GAS-twenty two Ltd. | Ship building contracts with Samsung
Tangible fixed assets
LNG Cargo capacity (in cbm) per vessel | m³								174,000
GAS-twenty four Ltd. and GAS-twenty five Ltd | Ship building contracts with Hyundai
Tangible fixed assets
Number of LNG carriers per the shipbuilding contract | item							2
LNG Cargo capacity (in cbm) per vessel | m³							174,000
GAS-twenty three Ltd | Ship building contracts with Samsung
Tangible fixed assets
Number of LNG carriers per the shipbuilding contract | item								1
LNG Cargo capacity (in cbm) per vessel | m³								174,000
GAS-twenty nine Ltd | Ship building contracts with Samsung
Tangible fixed assets
Number of LNG carriers per the shipbuilding contract | item						1
LNG Cargo capacity (in cbm) per vessel | m³						180,000
GAS-twenty eight Ltd. | Ship building contracts with Samsung
Tangible fixed assets
Number of LNG carriers per the shipbuilding contract | item					1
LNG Cargo capacity (in cbm) per vessel | m³					180,000
GAS-thirty one Ltd. | Ship building contracts with Samsung
Tangible fixed assets
Number of LNG carriers per the shipbuilding contract | item				1
LNG Cargo capacity (in cbm) per vessel | m³				180,000
GAS-thirty Ltd. | Ship building contracts with Samsung
Tangible fixed assets
Number of LNG carriers per the shipbuilding contract | item			1
LNG Cargo capacity (in cbm) per vessel | m³			180,000
Vessels
Tangible fixed assets
Balance, at the beginning of the period					$ 3,757,051				3,757,051
Balance, at the end of the period									4,359,432	3,757,051
Office property and other tangible assets
Tangible fixed assets
Balance, at the beginning of the period					15,515				15,515
Balance, at the end of the period									18,863	15,515
Vessels under construction
Tangible fixed assets
Balance, at the beginning of the period					166,655				166,655
Balance, at the end of the period									89,956	166,655
Vessels held under financial lease
Tangible fixed assets
Balance, at the beginning of the period					214,329				214,329
Balance, at the end of the period									210,646	214,329
Cost
Tangible fixed assets
Balance, at the beginning of the period					4,237,090				4,237,090
Additions									36,983
Transfer from vessels under construction									639,260
Fully amortized fixed assets									(5,000)
Balance, at the end of the period									4,908,333	4,237,090
Cost | Vessels
Tangible fixed assets
Balance, at the beginning of the period					4,217,866				4,217,866
Additions									33,225
Transfer from vessels under construction									639,260
Fully amortized fixed assets									(5,000)
Balance, at the end of the period									4,885,351	4,217,866
Cost | Office property and other tangible assets
Tangible fixed assets
Balance, at the beginning of the period					19,224				19,224
Additions									3,758
Balance, at the end of the period									22,982	19,224
Cost | Vessels under construction
Tangible fixed assets
Balance, at the beginning of the period					166,655				166,655
Additions									564,211
Transfer from vessels under construction									(639,260)
Transfer under "Other non-current assets"									(1,650)
Balance, at the end of the period									89,956	166,655
Cost | Vessels held under financial lease
Tangible fixed assets
Balance, at the beginning of the period					228,523				228,523
Additions									145
Balance, at the end of the period									228,668	228,523
Accumulated depreciation
Tangible fixed assets
Balance, at the beginning of the period					464,524				464,524
Depreciation expense									70,514
Fully amortized fixed assets									(5,000)
Balance, at the end of the period									530,038	464,524
Accumulated depreciation | Vessels
Tangible fixed assets
Balance, at the beginning of the period					460,815				460,815
Depreciation expense									70,104
Fully amortized fixed assets									(5,000)
Balance, at the end of the period									525,919	460,815
Accumulated depreciation | Office property and other tangible assets
Tangible fixed assets
Balance, at the beginning of the period					3,709				3,709
Depreciation expense									410
Balance, at the end of the period									4,119	3,709
Accumulated depreciation | Vessels held under financial lease
Tangible fixed assets
Balance, at the beginning of the period					$ 14,194				14,194
Depreciation expense									3,828
Balance, at the end of the period									$ 18,022	$ 14,194

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Sale and Leaseback (Detail) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Sale and Leaseback
Finance lease liability, current portion	$ 6,485	$ 6,302
Finance lease liability, non-current portion	203,355	207,126
Total	$ 209,840	$ 213,428

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Borrowings (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Borrowings
Amounts due within one year	$ 193,709	$ 188,167
Less: unamortized deferred loan/bond issuance costs	(11,153)	(8,800)
Borrowings, current portion	182,556	179,367
Amounts due after one year	2,784,651	2,399,849
Less: unamortized deferred loan/bond issuance costs	(42,396)	(31,660)
Borrowings, non-current portion	2,742,255	2,368,189
Total	$ 2,924,811	$ 2,547,556

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Borrowings - Bank Loans (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2018 USD ($)
GAS-nineteen Ltd., GAS-twenty Ltd. and GAS-twenty one Ltd.
Borrowings
Borrowings prepaid	$ 29,750

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Borrowings - Bonds (Details) - NOK 2021 Bonds $ in Thousands		12 Months Ended
	Jun. 30, 2018 USD ($) $ / kr	Dec. 31, 2017 USD ($) $ / kr
Borrowings
Aggregate carrying amount, net of unamortized financing costs and unamortized premium	$ 90,964	$ 89,723
Fair value of bond	$ 97,832	$ 97,416
Exchange rate | $ / kr	0.1228	0.1213

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Related Party Transactions - Receivables and Payables (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2018	Dec. 31, 2017
Related Party Transactions
Ship management creditors	$ 450	$ 993
Amounts due to related parties	72	35
Dividends receivable and other amounts due from related parties
Dividends receivable and other amounts due from related parties	8,075	8,666
Other receivables
Dividends receivable and other amounts due from related parties
Dividends receivable and other amounts due from related parties	315	355
Reimbursement of expenses incurred, for office lease, and other operating expenses
Related Party Transactions
Amounts due to related parties	72	35
Associates | Dividends receivable
Dividends receivable and other amounts due from related parties
Dividends receivable and other amounts due from related parties	763	125
The Cool Pool Limited / Joint venture | Accrued income receivable
Dividends receivable and other amounts due from related parties
Dividends receivable and other amounts due from related parties	$ 6,997	$ 8,186

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Revenues from Contracts with Customers (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenues	$ 132,824	$ 129,930	$ 271,302	$ 258,215
Time Charters
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenue from contracts with customers	127,573	121,581	252,467	242,283
Cool Pool Services
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenue from contracts with customers	5,047	8,023	18,452	15,378
Net pool allocation	6,958	492	15,611	1,320
Vessel Management Services
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenue from contracts with customers	$ 204	$ 326	$ 383	$ 554

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General and Administrative Expenses (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
General and Administrative Expenses
Employee costs	$ 4,677	$ 4,403	$ 11,628	$ 9,614
Board of directors' fees	622	542	1,344	1,103
Share-based compensation	1,329	1,223	2,515	2,235
Rent and utilities	570	541	1,086	1,144
Travel and accommodation	701	555	1,033	1,050
Legal and professional fees	1,704	2,393	3,326	3,955
Foreign exchange differences, net	63	(84)	(241)	(39)
Other expenses	686	673	1,674	1,163
Total	$ 10,352	$ 10,246	$ 22,365	$ 20,225

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Other Payables and Accruals (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Other Payables and Accruals
Social contributions	$ 797	$ 1,244
Unearned revenue	41,089	34,926
Accrued legal and professional fees	994	1,567
Accrued board of directors' fees	622	577
Accrued employee costs	5,156	5,494
Accrued off-hire	7,926	5,284
Accrued crew costs	3,898	4,027
Accrued purchases	17,289	4,227
Accrued financing cost	36	1,984
Accrued interest	34,681	27,851
Accrued payable to charterers	5,859	4,179
Other accruals	2,218	2,058
Total	$ 120,565	$ 93,418

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Share Capital and Preference Shares (Details) - USD ($) $ / shares in Units, $ in Thousands	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Movements in number of shares, share capital, Preference Shares, contributed surplus and treasury shares
Balance at beginning of period	$ 1,763,134	$ 1,509,682
Treasury shares, net	(62)
Treasury shares distributed for awards vested or exercised in the period	86	(107)
Dividend declared deducted from Contributed surplus due to accumulated deficit	(71,223)	(55,535)
Balance at the end of the period	$ 1,863,069	1,717,222
Share capital
Share Capital
Shares authorized (in shares)	500,000,000
Par value per share (in dollar per share)	$ 0.01
Movements in number of shares, share capital, Preference Shares, contributed surplus and treasury shares
Balance at beginning of period	$ 810	810
Balance at the end of the period	$ 810	810
Treasury shares
Movements in number of shares, share capital, Preference Shares, contributed surplus and treasury shares
Number of shares outstanding at beginning of period	275,241
Balance at beginning of period	$ (6,960)	(10,861)
Treasury shares, net (in shares)	2,818
Treasury shares, net	$ (62)
Treasury shares distributed for awards vested or exercised in the period (in shares)	(99,014)
Treasury shares distributed for awards vested or exercised in the period	$ 2,550	1,664
Number of shares outstanding at end of period	179,045
Balance at the end of the period	$ (4,472)	(9,197)
Contributed surplus
Movements in number of shares, share capital, Preference Shares, contributed surplus and treasury shares
Balance at beginning of period	911,766	966,974
Dividend declared deducted from Contributed surplus due to accumulated deficit	(28,452)	(27,597)
Balance at the end of the period	$ 883,314	939,377
Common Units/Shares
Movements in number of shares, share capital, Preference Shares, contributed surplus and treasury shares
Number of shares outstanding at beginning of period	80,717,885
Treasury shares, net (in shares)	(2,818)
Treasury shares distributed for awards vested or exercised in the period (in shares)	99,014
Number of shares outstanding at end of period	80,814,081
Common Units/Shares | Share capital
Share Capital
Par value per share (in dollar per share)	$ 0.01
Units/Shares issued to underwriters	80,814,081
Preference Units/Shares
Movements in number of shares, share capital, Preference Shares, contributed surplus and treasury shares
Number of shares outstanding at beginning of period	4,600,000
Balance at beginning of period	$ 46	46
Number of shares outstanding at end of period	4,600,000
Balance at the end of the period	$ 46	$ 46

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Share Capital and Preference Shares - Dividend Distribution (Details) - USD ($) $ / shares in Units, $ in Thousands	Jul. 02, 2018	May 24, 2018	May 11, 2018	Apr. 02, 2018	Mar. 15, 2018	Mar. 08, 2018	Mar. 03, 2018	Feb. 15, 2018
Common Units/Shares
Share Capital
Dividend per share (in dollars per share)							$ 0.15	$ 0.14
Dividend amount paid		$ 12,120			$ 11,300
Series A Preference Shares
Share Capital
Dividend per share (in dollars per share)			$ 0.546875			$ 0.546875
Dividend amount paid	$ 2,516			$ 2,516

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Commitments and Contingencies - Operating Lease Commitments (Details) $ in Thousands	Jun. 30, 2018 USD ($)
Commitments as lessee relating to buildings under operating leases
Operating lease commitment	$ 3,132
Not later than one year
Commitments as lessee relating to buildings under operating leases
Operating lease commitment	1,185
Later than one year and not later than three years
Commitments as lessee relating to buildings under operating leases
Operating lease commitment	1,382
Later than three years and not later than five years
Commitments as lessee relating to buildings under operating leases
Operating lease commitment	$ 565

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Commitments and Contingencies - Related To Vessels Under Construction (Details) - USD ($) $ in Thousands	Mar. 08, 2016	Jun. 30, 2018
Samsung | Vessels under construction
Commitments related to vessels under construction
Capital commitment		$ 875,878
GAS-twenty two Ltd. and GAS-twenty three Ltd. | MSL
Commitments related to vessels under construction
Amount to be reimbursed for installation of reliquefaction plants on vessels, as a percent	50.00%
Aggregate commitment to be reimbursed per vessel	$ 3,200
GAS-twenty two Ltd.
Commitments related to vessels under construction
Commitment amount receivable on completion of reliquefaction plant installation included in trade and other receivables	$ 3,200
Not later than one year | Samsung | Vessels under construction
Commitments related to vessels under construction
Capital commitment		255,568
Later than one year and not later than three years | Samsung | Vessels under construction
Commitments related to vessels under construction
Capital commitment		$ 620,310

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Commitments and Contingencies - Revenues From Non-cancellable Charter Agreements (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2018 USD ($)
Time Charter Agreements
Number of assumed off-hire days when each vessel will undergo scheduled dry-docking	30 days
Future gross minimum lease revenues receivable upon collection of hire under non-cancellable time charter agreements	$ 1,975,438
Not later than one year
Time Charter Agreements
Future gross minimum lease revenues receivable upon collection of hire under non-cancellable time charter agreements	411,409
Later than one year and not later than three years
Time Charter Agreements
Future gross minimum lease revenues receivable upon collection of hire under non-cancellable time charter agreements	639,397
Later than three years and not later than five years
Time Charter Agreements
Future gross minimum lease revenues receivable upon collection of hire under non-cancellable time charter agreements	425,591
More than five years
Time Charter Agreements
Future gross minimum lease revenues receivable upon collection of hire under non-cancellable time charter agreements	$ 499,041

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Commitments and Contingencies - Other commitments and guarantees (Details) $ in Thousands			12 Months Ended
	Sep. 27, 2017 item	Oct. 11, 2016	Dec. 31, 2014 item	Jun. 30, 2018 USD ($)	Dec. 31, 2015 item	Nov. 02, 2015 USD ($)
GasLog LNG Services Ltd.
Commitments
Commitments for enhancing operational performance without including additional estimated costs				$ 11,142
Number of maintenance agreements related to vessels | item			7
GasLog LNG Services Ltd. | Keppel Shipyard Limited
Commitments
Threshold period after which if LLI has not been utilized in a vessel conversion for items will be charged at a percentage of the original cost, in years		3 years
LLI cost, expressed as a percentage of original cost		110.00%
LLI discounted purchase price, expressed as a percentage of the original cost		85.00%
GasLog LNG Services Ltd. | Wartsila
Commitments
Number of maintenance agreements related to carriers | item	8
Number of maintenance agreements related to vessels, renewed | item	4
Number of service agreements related to carriers | item	4
Keppel Shipyard Limited
Commitments
Commitments for engineering related agreement				3,787
Purchase of depot spares | MSL
Commitments
Number of vessels acquired | item			6		2
Capital commitment				8,000
Depot spares purchased and paid				660
Newbuildings and/or modifications to existing vessels | MSL
Commitments
Capital commitment						$ 2,654
Outstanding commitment - MSL letter of agreement				1,349
Newbuildings and/or modifications to existing vessels | MSL | Maximum
Commitments
Capital commitment				3,801
Not later than one year | GasLog LNG Services Ltd.
Commitments
Commitments for enhancing operational performance without including additional estimated costs				11,142
Not later than one year | Keppel Shipyard Limited
Commitments
Commitments for engineering related agreement				$ 3,787

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Derivative Financial Instruments - Fair value of the derivative assets and liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Derivative Financial Instruments
Derivative financial instruments, current assets	$ 6,206	$ 2,199
Derivative financial instruments, non-current assets	31,440	16,012
Total	37,646	18,211
Derivative financial instruments, current liability	1,109	1,815
Derivative financial instruments, non-current liability	1,149
Total	2,258	1,815
Derivative assets designated and effective as hedging instruments carried at fair value | Cross currency swaps
Derivative Financial Instruments
Total	5,916	4,553
Derivative assets carried at fair value through profit or loss (FVTPL) | Interest rate swaps
Derivative Financial Instruments
Total	31,629	11,535
Derivative assets carried at fair value through profit or loss (FVTPL) | Forward foreign exchange contracts
Derivative Financial Instruments
Total	101	2,123
Derivative liabilities designated and effective as hedging instruments carried at fair value | Cross currency swaps
Derivative Financial Instruments
Total	212	605
Derivative liabilities carried at fair value through profit or loss (FVTPL) | Interest rate swaps
Derivative Financial Instruments
Total	1,152	$ 1,210
Derivative liabilities carried at fair value through profit or loss (FVTPL) | Forward foreign exchange contracts
Derivative Financial Instruments
Total	$ 894

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Derivative Financial Instruments - Interest rate swaps held for trading (Details) - USD ($) $ in Thousands		3 Months Ended			6 Months Ended
		Jun. 30, 2018		Jun. 30, 2017	Jun. 30, 2018		Jun. 30, 2017	May 31, 2018	Dec. 31, 2017
Interest rate swaps held for trading
Interest rate swaps
Notional Amount		$ 1,170,000			$ 1,170,000				$ 1,170,000
Unrealized gain (loss) on interest rate swaps held for trading		$ (3,838)		$ (4,978)	$ 20,151		$ (3,140)
GasLog with counterparty Deutsche Bank AG, termination in July 2020
Interest rate swaps
Fixed Interest Rate		1.98%			1.98%
Notional Amount		$ 66,667			$ 66,667				66,667
GasLog with counterparty Deutsche Bank AG, termination in July 2021
Interest rate swaps
Fixed Interest Rate		1.98%			1.98%
Notional Amount		$ 66,667			$ 66,667				66,667
GasLog with counterparty Deutsche Bank AG, termination in July 2022
Interest rate swaps
Fixed Interest Rate		1.98%			1.98%
Notional Amount		$ 66,667			$ 66,667				66,667
GasLog with counterparty DNB Bank ASA, termination in July 2020
Interest rate swaps
Fixed Interest Rate		1.784%			1.784%
Notional Amount		$ 73,333			$ 73,333				73,333
GasLog with counterparty DNB Bank ASA, termination in July 2021
Interest rate swaps
Fixed Interest Rate	[1]	1.729%			1.729%
Notional Amount	[1]	$ 73,333			$ 73,333				73,333
GasLog with counterparty DNB Bank ASA, termination in July 2022
Interest rate swaps
Fixed Interest Rate		1.719%			1.719%
Notional Amount		$ 73,333			$ 73,333				73,333
GasLog with counterparty HSBC Bank, plc, termination in July 2020
Interest rate swaps
Fixed Interest Rate	[2]	1.896%			1.896%
Notional Amount	[2]								33,333
GasLog with counterparty HSBC Bank, plc, termination in July 2021
Interest rate swaps
Fixed Interest Rate	[2]	1.818%			1.818%
Notional Amount	[2]								33,333
GasLog with counterparty HSBC Bank, plc, termination in July 2022
Interest rate swaps
Fixed Interest Rate		1.79%			1.79%
Notional Amount		$ 33,333			$ 33,333				33,333
GasLog with counterparty Nordea Bank Finland, termination in July 2020
Interest rate swaps
Fixed Interest Rate		1.905%			1.905%
Notional Amount		$ 66,667			$ 66,667				66,667
GasLog with counterparty Nordea Bank Finland, termination in July 2021
Interest rate swaps
Fixed Interest Rate	[3]	1.84%			1.84%
Notional Amount	[3]								66,667
GasLog with counterparty Nordea Bank Finland, termination in July 2022
Interest rate swaps
Fixed Interest Rate		1.815%			1.815%
Notional Amount		$ 66,667			$ 66,667				66,667
GasLog with counterparty Skandinavinska Enskilda Banken AB (publ) ("SEB"), termination in July 2020
Interest rate swaps
Fixed Interest Rate		1.928%			1.928%
Notional Amount		$ 50,000			$ 50,000				50,000
GasLog with counterparty Skandinavinska Enskilda Banken AB (publ) ("SEB"), termination in July 2021
Interest rate swaps
Fixed Interest Rate		1.8405%			1.8405%
Notional Amount		$ 50,000			$ 50,000				50,000
GasLog with counterparty Skandinavinska Enskilda Banken AB (publ) ("SEB"), termination in July 2022
Interest rate swaps
Fixed Interest Rate	[2]	1.814%			1.814%
Notional Amount	[2]								50,000
GasLog with counterparty HSBC Bank plc, termination in February 2022
Interest rate swaps
Fixed Interest Rate		2.005%			2.005%
Notional Amount		$ 100,000			$ 100,000				100,000
GasLog with counterparty Nordea Bank Finland, termination in March 2022
Interest rate swaps
Fixed Interest Rate		2.0145%			2.0145%
Notional Amount		$ 100,000			$ 100,000				100,000
GasLog with counterparty ABN Amro Bank NV ("ABN"), termination in March 2022
Interest rate swaps
Fixed Interest Rate		2.003%			2.003%
Notional Amount		$ 100,000			$ 100,000				$ 100,000
GasLog with counterparty Nordea Bank Finland, termination in July 2026, Interest rate of 3.070 percent
Interest rate swaps
Fixed Interest Rate	[4]	3.07%			3.07%
GasLog with counterparty Nordea Bank Finland, termination in July 2026
Interest rate swaps
Fixed Interest Rate	[3]	2.562%			2.562%
Notional Amount		$ 66,667	[3]		$ 66,667	[3]		$ 66,667
GasLog with counterparty Skandinavinska Enskilda Banken AB (publ) ("SEB"), termination in July 2024
Interest rate swaps
Fixed Interest Rate	[4]	3.025%			3.025%
GasLog with counterparty Skandinavinska Enskilda Banken AB (publ) ("SEB"), termination in July 2025
Interest rate swaps
Fixed Interest Rate	[2]	2.30%			2.30%
Notional Amount		$ 50,000	[2]		$ 50,000	[2]		50,000
GasLog with counterparty DNB Bank ASA, termination in July 2024
Interest rate swaps
Fixed Interest Rate	[4]	3.056%			3.056%
GasLog with counterparty DNB Bank ASA, termination in July 2025
Interest rate swaps
Fixed Interest Rate	[1]	2.472%			2.472%
Notional Amount								73,333
GasLog with counterparty HSBC Bank, plc, termination in July 2024
Interest rate swaps
Fixed Interest Rate	[2]	2.475%			2.475%
Notional Amount	[2]	$ 33,333			$ 33,333
GasLog with counterparty HSBC Bank, plc, termination in July 2025
Interest rate swaps
Fixed Interest Rate	[2]	2.55%			2.55%
Notional Amount	[2]	$ 33,333			$ 33,333
GasLog with counterparty HSBC Bank, plc, termination in July 2024 and July 2025
Interest rate swaps
Notional Amount								66,666
GasLog with counterparty Citibank Europe Plc, termination in July 2024
Interest rate swaps
Fixed Interest Rate	[4]	3.082%			3.082%
GasLog with counterparty Citibank Europe Plc, termination in July 2025
Interest rate swaps
Fixed Interest Rate	[4]	3.095%			3.095%
Interest rate swaps, maturing between 2024 and 2026
Interest rate swaps
Notional Amount								$ 250,000

[1] In May 2018, the Group terminated an interest rate swap originally maturing in July 2021 with an effective date of July 2018. This swap was subsequently replaced with a new swap of the same notional amount of $73,333 with an effective date of July 2018 and a new maturity date of July 2025.

[2] Effective May 2018, the Group terminated the interest rate swap with SEB originally maturing in July 2022 and replaced with a new swap of the same notional amount of $50,000 with an effective date of April 2018 and a new maturity date of July 2025.In addition, in May 2018, the Group terminated the interest rate swap agreements with HSBC with an aggregate notional value of $66,666 and entered into new agreements of the same notional amounts with an effective date April 2018.

[3] Effective May 2018, the Group terminated the interest rate swap originally maturing in July 2021 and replaced with a new swap of the same notional amount of $66,667 maturing in July 2026.

[4] In May 2018, the Group entered into new interest rate swap agreements with various counterparties with an aggregate notional value of $250,000, with effective dates in July 2020 and July 2021, maturing between 2024 and 2026.

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Derivative Financial Instruments - Cross currency swap agreements (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Cross currency swaps qualified as cash flow hedging instruments
Cross currency swap agreements
Notional Amount	$ 90,150		$ 90,150		$ 90,150
Effective portion of changes in fair value of cash flow hedges recognized in other comprehensive income	(4,062)	$ 3,342	2,128	$ 3,709
Effective portion of changes in fair value of cash flow hedges, net of amounts recycled to profit or loss	(90)	(203)	(159)	(526)
Hedging loss/gain recognized in other comprehensive income due to retranslation of bonds	$ 3,676	$ (2,782)	$ (1,077)	$ (3,516)
Gaslog with counterparty DNB Bank ASA, traded in June 2016
Cross currency swap agreements
Fixed Interest Rate	8.59%		8.59%
Notional Amount	$ 30,050		$ 30,050		30,050
Gaslog with counterparty SEB, traded in June 2016
Cross currency swap agreements
Fixed Interest Rate	8.59%		8.59%
Notional Amount	$ 30,050		$ 30,050		30,050
Gaslog with counterparty Nordea Bank Finland, traded in June 2016
Cross currency swap agreements
Fixed Interest Rate	8.59%		8.59%
Notional Amount	$ 30,050		$ 30,050		$ 30,050

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Derivative Financial Instruments - Forward foreign exchange contracts (Details) € in Thousands, £ in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018 USD ($) contract	Jun. 30, 2017 USD ($)	Jun. 30, 2018 GBP (£) contract	Jun. 30, 2018 EUR (€) contract	Jun. 30, 2018 USD ($) contract	Jun. 30, 2017 USD ($)	Jun. 30, 2018 $ / £	Jun. 30, 2018 $ / €
Forward foreign exchange contracts
Unrealized (loss)/gain on derivative financial instruments held for trading | $	$ 74	$ (3,487)			$ 17,235	$ (1,172)
Forward foreign exchange contracts
Forward foreign exchange contracts
Total Exchange Amount			£ 1,800	€ 69,495
Unrealized (loss)/gain on derivative financial instruments held for trading | $	$ (3,764)	$ 1,491			$ (2,916)	$ 1,968
GasLog with counterparty Skandinavinska Enskilda Banken AB (publ) ("SEB"), settlement in July to December 2018
Forward foreign exchange contracts
Number of contracts	6		6	6	6
Fixed Exchange Rate							1.3042	1.1966
Total Exchange Amount			£ 1,800	€ 6,000
GasLog with counterparty Nordea Bank Finland, settlement in July to December 2018
Forward foreign exchange contracts
Number of contracts	6		6	6	6
Fixed Exchange Rate | $ / €								1.1986
Total Exchange Amount | €				€ 4,500
GasLog with counterparty DNB Bank ASA ("DNB"), Settlement In July 2018
Forward foreign exchange contracts
Number of contracts	1		1	1	1
Fixed Exchange Rate | $ / €								1.1746
Total Exchange Amount | €				€ 1,995
GasLog with counterparty Citibank, settlement in July 2018
Forward foreign exchange contracts
Number of contracts	1		1	1	1
Fixed Exchange Rate | $ / €								1.2023
Total Exchange Amount | €				€ 2,000
GasLog with counterparty Citibank, settlement in August 2018
Forward foreign exchange contracts
Number of contracts	1		1	1	1
Fixed Exchange Rate | $ / €								1.2048
Total Exchange Amount | €				€ 2,000
GasLog with counterparty Citibank, settlement in September 2018
Forward foreign exchange contracts
Number of contracts	1		1	1	1
Fixed Exchange Rate | $ / €								1.2072
Total Exchange Amount | €				€ 2,000
GasLog with counterparty Citibank, settlement in October 2018
Forward foreign exchange contracts
Number of contracts	1		1	1	1
Fixed Exchange Rate | $ / €								1.2099
Total Exchange Amount | €				€ 2,000
GasLog with counterparty Citibank, settlement in November 2018
Forward foreign exchange contracts
Number of contracts	1		1	1	1
Fixed Exchange Rate | $ / €								1.2123
Total Exchange Amount | €				€ 2,000
GasLog with counterparty Citibank, settlement in December 2018
Forward foreign exchange contracts
Number of contracts	1		1	1	1
Fixed Exchange Rate | $ / €								1.2148
Total Exchange Amount | €				€ 2,000
GasLog with counterparty Citibank, traded in May 2018, settlement in July 2018
Forward foreign exchange contracts
Number of contracts	1		1	1	1
Fixed Exchange Rate | $ / €								1.1758
Total Exchange Amount | €				€ 1,000
GasLog with counterparty Citibank, traded in May 2018, settlement in August 2018
Forward foreign exchange contracts
Number of contracts	1		1	1	1
Fixed Exchange Rate | $ / €								1.1786
Total Exchange Amount | €				€ 1,000
GasLog with counterparty Citibank, traded in May 2018, settlement in September 2018
Forward foreign exchange contracts
Number of contracts	1		1	1	1
Fixed Exchange Rate | $ / €								1.1816
Total Exchange Amount | €				€ 1,000
GasLog with counterparty Citibank, traded in May 2018, settlement in October 2018
Forward foreign exchange contracts
Number of contracts	1		1	1	1
Fixed Exchange Rate | $ / €								1.1844
Total Exchange Amount | €				€ 1,000
GasLog with counterparty Citibank, traded in May 2018, settlement in November 2018
Forward foreign exchange contracts
Number of contracts	1		1	1	1
Fixed Exchange Rate | $ / €								1.1875
Total Exchange Amount | €				€ 1,000
GasLog with counterparty Citibank, traded in May 2018, settlement in December 2018
Forward foreign exchange contracts
Number of contracts	1		1	1	1
Fixed Exchange Rate | $ / €								1.1905
Total Exchange Amount | €				€ 1,000
GasLog with counterparty Skandinavinska Enskilda Banken AB (publ) ("SEB"), traded in May 2018, settlement in July to December 2018
Forward foreign exchange contracts
Number of contracts	6		6	6	6
Fixed Exchange Rate | $ / €								1.1831
Total Exchange Amount | €				€ 6,000
GasLog with counterparty HSBC Bank PLC, traded in May 2018, settlement in July to December 2018
Forward foreign exchange contracts
Number of contracts	6		6	6	6
Fixed Exchange Rate | $ / €								1.1847
Total Exchange Amount | €				€ 3,000
GasLog with counterparty Citibank, settlement in january 2019
Forward foreign exchange contracts
Number of contracts	1		1	1	1
Fixed Exchange Rate | $ / €								1.1954
Total Exchange Amount | €				€ 2,500
GasLog with counterparty Citibank, settlement in February 2019
Forward foreign exchange contracts
Number of contracts	1		1	1	1
Fixed Exchange Rate | $ / €								1.1983
Total Exchange Amount | €				€ 2,500
GasLog with counterparty Citibank, settlement in March 2019
Forward foreign exchange contracts
Number of contracts	1		1	1	1
Fixed Exchange Rate | $ / €								1.2012
Total Exchange Amount | €				€ 2,500
GasLog with counterparty Skandinavinska Enskilda Banken AB (publ) ("SEB"), settlement in January to March 2019
Forward foreign exchange contracts
Number of contracts	3		3	3	3
Fixed Exchange Rate | $ / €								1.1984
Total Exchange Amount | €				€ 7,500
GasLog with counterparty ABN Amro Bank NV ("ABN"), settlement in April 2019
Forward foreign exchange contracts
Number of contracts	1		1	1	1
Fixed Exchange Rate | $ / €								1.1903
Total Exchange Amount | €				€ 2,500
GasLog with counterparty ABN Amro Bank NV ("ABN"), settlement in May 2019
Forward foreign exchange contracts
Number of contracts	1		1	1	1
Fixed Exchange Rate | $ / €								1.1936
Total Exchange Amount | €				€ 2,500
GasLog with counterparty ABN Amro Bank NV ("ABN"), settlement in June 2019
Forward foreign exchange contracts
Number of contracts	1		1	1	1
Fixed Exchange Rate | $ / €								1.1968
Total Exchange Amount | €				€ 2,500
GasLog with counterparty Dnb Bank, settlement in April 2019
Forward foreign exchange contracts
Number of contracts	1		1	1	1
Fixed Exchange Rate | $ / €								1.1910
Total Exchange Amount | €				€ 2,500
GasLog with counterparty Dnb Bank, settlement in May 2019
Forward foreign exchange contracts
Number of contracts	1		1	1	1
Fixed Exchange Rate | $ / €								1.1943
Total Exchange Amount | €				€ 2,500
GasLog with counterparty Dnb Bank, settlement in June 2019
Forward foreign exchange contracts
Number of contracts	1		1	1	1
Fixed Exchange Rate | $ / €								1.1975
Total Exchange Amount | €				€ 2,500

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Financial Costs and (Loss)/Gain on Derivatives (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Financial Costs
Amortization and write-off of deferred loan/bond issuance costs and premium	$ (3,232)	$ (2,978)	$ (6,144)	$ (6,437)
Interest expense on loans	(28,066)	(21,099)	(51,263)	(43,581)
Interest expense on bonds and realized loss on cross currency swaps	(7,442)	(8,451)	(14,915)	(11,971)
Finance lease charge	(2,634)	(2,722)	(5,262)	(5,436)
Loss arising on NOK bond repurchase at a premium		(1,459)		(1,459)
Other financial costs	(626)	(369)	(1,013)	(718)
Total financial costs	(42,000)	(37,078)	(78,597)	(69,602)
(Loss)/Gain on Derivatives
Unrealized (loss)/gain on derivative financial instruments held for trading (Note 14)	74	(3,487)	17,235	(1,172)
Realized (loss)/gain on interest rate swaps held for trading	1,003	(2,226)	390	(4,377)
Recycled loss of cash flow hedges reclassified to profit or loss		(4,368)		(4,368)
Realized gain on forward foreign exchange contracts held for trading	357	361	1,843	195
Ineffective portion of cash flow hedges	(267)		(530)
Total (loss)/gain on derivatives	$ 1,167	$ (9,720)	$ 18,938	$ (9,722)

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Cash Flow Reconciliations - Reconciliation of borrowings arising from financing activities (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Opening balance
Borrowings outstanding at the beginning of the year	$ 2,547,556
Borrowings outstanding at the end of the year	2,547,556
Cash flows
Proceeds from bank loans and bonds	498,225
Bank loans and bond repayments	(108,958)
Additions in deferred loan fees	(7,295)
Borrowings outstanding at the end of the year	381,972
Other comprehensive income
Retranslation of the NOK Bonds in U.S. dollars	1,077
Borrowings outstanding at the end of the year	1,077
Non-cash items
Additions in deferred loan fees	1,447
Amortization of deferred loan/bond issuance costs and premium	6,144
Borrowings outstanding at the end of the year	7,591
Deferred financing costs, assets
Additions in deferred loan fees	(13,385)
Borrowings outstanding at the end of the year	(13,385)
Total borrowings
Borrowings outstanding at the beginning of the year	2,547,556
Proceeds from bank loans and bonds	498,225	$ 280,000
Bank loan and bond repayments	(108,958)	$ (276,158)
Additions in deferred loan fees	(19,233)
Amortization of deferred loan/bond issuance costs and premium	6,144
Retranslation of the NOK Bonds in U.S. dollars	1,077
Borrowings outstanding at the end of the year	$ 2,924,811

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Cash Flow Reconciliations - Reconciliation of derivatives arising from financing activities (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2018 USD ($)
Reconciliation of derivatives arising from financing activities, Opening balance
Net derivative assets as of beginning of the period, Opening balance	$ (16,396)
Net derivative assets as of end of the period, Opening balance	(16,396)
Reconciliation of derivatives arising from financing activities, Other comprehensive income
Net derivative liabilities as of beginning of the period, Other comprehensive income	0
Effective portion of changes in the fair value of derivatives designated as cash flow hedging instruments, Other comprehensive income	(2,287)
Net derivative assets as of end of the period, Other comprehensive income	(2,287)
Reconciliation of derivatives arising from financing activities, Non-cash items
Net derivative assets as of beginning of the period, Non-cash items	0
Unrealized gain on derivative financial instruments held for trading, Non-cash items	(17,235)
Ineffective portion of cash flow hedges, Non cash items	530
Net derivative assets as of end of the period, Non-cash items	(16,705)
Reconciliation of derivatives arising from financing activities, Total
Net derivative assets as of beginning of the period	(16,396)
Unrealized gain on derivative financial instruments held for trading	(17,235)
Ineffective portion of cash flow hedges	530
Effective portion of changes in the fair value of derivatives designated as cash flow hedging instruments	(2,287)
Net derivative assets as of end of the year	$ (35,388)

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Cash Flow Reconciliations - Reconciliation of tangible fixed assets, vessels under construction and vessel held under finance lease arising from investing activities (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Total
Balance, at the beginning of the period			$ 3,772,566
Depreciation	$ (38,813)	$ (34,451)	(74,342)	$ (68,159)
Balance, at the end of the period	4,378,295		4,378,295
Tangible Fixed Assets and Vessels Under Construction
Opening balance
Tangible fixed assets, vessels under construction and vessel held under finance lease at the beginning of the year			4,153,550
Tangible fixed assets,vessels under construction and vessel held under finance lease at the end of the year	4,153,550		4,153,550
Cash flows
Additions			588,929
Tangible fixed assets,vessels under construction and vessel held under finance lease at the end of the year	588,929		588,929
Non-cash items
Additions			12,410
Transfer under "Other non-current assets"			(1,650)
Depreciation expense			(74,342)
Tangible fixed assets,vessels under construction and vessel held under finance lease at the end of the year	(63,582)		(63,582)
Total
Balance, at the beginning of the period			4,153,550
Additions			601,339
Transfer under "Other non-current assets"			(1,650)
Depreciation			(74,342)
Balance, at the end of the period	$ 4,678,897		$ 4,678,897

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Cash Flow Reconciliations - Reconciliation of finance lease liabilities arising from financing activities (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Opening balance
Finance lease liabilities at beginning of the year	$ 213,428
Finance lease liabilities at end of the year	213,428
Cash flows
Payments for interest, Cash flows	(5,262)
Payments for finance lease liability, Cash flows	(3,588)
Finance lease liabilities at end of the year, Cash flows	(8,850)
Non-cash items
Finance lease charge, Non-cash items	5,262
Finance lease liabilities at end of the year, Non-cash items	5,262
Total
Financial lease liabilities, beginning of year	213,428
Finance lease charge	5,262
Payments for interest	(5,262)
Payments for finance lease liability	(3,588)	$ (13)
Financial lease liabilities, end of year	$ 209,840

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Cash Flow Reconciliations - Reconciliation of equity offerings arising from financing activities (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Cash flows
Proceeds from GasLog Partners' preference unit offerings (net of underwriting discounts and commissions)	$ 111,544
Proceeds from public offerings and private placement (net of underwriting discounts and commissions)	24
Offering costs	(660)	$ (336)
Net proceeds from equity offerings at the end of the year	110,908
Non-cash items
Offering costs	276
Net proceeds from equity offerings at the end of the year	276
Total
Proceeds from GasLog Partners' preference unit offerings (net of underwriting discounts and commissions)	111,544
Proceeds from public offerings and private placement (net of underwriting discounts and commissions)	24
Offering costs	(384)
Net proceeds from equity offerings at the end of the year	$ 111,184

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Share-Based Compensation - Omnibus Incentive Compensation Plan (Details)		6 Months Ended
	Apr. 02, 2018 USD ($) EquityInstruments	Jun. 30, 2018 EquityInstruments
RSUs
Share-Based Compensation
Number of awards granted | EquityInstruments	149,786	149,786
Fair value at grant date	$ 16.30
SARs
Share-Based Compensation
Awards that vest on each anniversary (as a percent)	33.33%
Number of awards granted | EquityInstruments	416,458	416,458
Exercise price	$ 16.30
Fair value at grant date	$ 5.3001

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Share-Based Compensation - SARs fair value (Details) - SARs	Apr. 02, 2018 USD ($) Y
Share-Based Compensation
Grant date share closing price	$ 16.30
Exercise price	$ 16.30
Expected volatility (as a percent)	44.50%
Expected term (Years) | Y	6
Risk-free interest rate for the period similar to the expected term	2.61%

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Share-Based Compensation - RSUs fair value (Details)	Apr. 02, 2018 USD ($)
RSUs
Share-Based Compensation
Grant date share closing price	$ 16.30

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Share-Based Compensation - RSUs movement (Details) - RSUs $ in Thousands		6 Months Ended	12 Months Ended
	Apr. 02, 2018 EquityInstruments	Jun. 30, 2018 USD ($) EquityInstruments	Dec. 31, 2017 USD ($) EquityInstruments
Number of awards
Outstanding at the beginning of the period | EquityInstruments		425,702
Granted during the period | EquityInstruments	149,786	149,786
Forfeited during the period | EquityInstruments		(1,179)
Vested during the period | EquityInstruments		(86,136)
Outstanding at end of the period | EquityInstruments		488,173	425,702
Weighted average contractual life
Outstanding		1 year 7 months 17 days	1 year 4 months 21 days
Aggregate fair value
Outstanding at the beginning of the period | $		$ 5,636
Granted during the period | $		2,441
Forfeited during the period | $		(14)
Vested during the period | $		(1,655)
Outstanding at the end of the period | $		$ 6,408	$ 5,636

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Share-Based Compensation - SARs movement (Details) - SARs		6 Months Ended	12 Months Ended
	Apr. 02, 2018 USD ($) EquityInstruments	Jun. 30, 2018 USD ($) EquityInstruments	Dec. 31, 2017 USD ($) EquityInstruments
Number of awards
Outstanding at beginning of the period | EquityInstruments		2,031,279
Granted during the period | EquityInstruments	416,458	416,458
Exercised during the period | EquityInstruments		(12,878)
Forfeited during the period | EquityInstruments		(3,333)
Expired during the year | EquityInstruments		(12,198)
Outstanding at end of the period | EquityInstruments		2,419,328	2,031,279
Vested but not been exercised | EquityInstruments		1,406,290
Weighted average exercise price per share
Outstanding at the beginning of the period		$ 14.59
Granted during the period	$ 16.30
Outstanding at end of the period		14.86	$ 14.59
Weighted average share price at the date of exercise
Exercised during the period		$ 18.06
Weighted average contractual life
Outstanding		7 years 7 months 17 days	7 years 8 months 5 days
Aggregate fair value
Outstanding at the beginning of the period		$ 7,874,000
Granted during the period		2,207,000
Exercised during the period		(47,000)
Forfeited during the period		(12,000)
Expired during the year		(72,000)
Outstanding at the end of the period		$ 9,950,000	$ 7,874,000

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Share-Based Compensation - GasLog Partners' Plan (Details)		6 Months Ended
	Apr. 02, 2018 USD ($) EquityInstruments	Jun. 30, 2018 EquityInstruments
RCUs
Share-Based Compensation
Number of awards granted | EquityInstruments	24,608	24,608
Fair value at grant date | $	$ 23.40
PCUs
Share-Based Compensation
Number of awards granted | EquityInstruments	24,608	24,608
Fair value at grant date | $	$ 23.40

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Share-Based Compensation - RCUs and PCUs fair value (Details)	Apr. 02, 2018 USD ($)
RCUs
Share-Based Compensation
Grant date share closing price used to determine fair value of awards	$ 23.40
PCUs
Share-Based Compensation
Grant date share closing price used to determine fair value of awards	$ 23.40

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Share-Based Compensation - RCUs movement (Details) - RCUs $ in Thousands		6 Months Ended	12 Months Ended
	Apr. 02, 2018 EquityInstruments	Jun. 30, 2018 USD ($) EquityInstruments	Dec. 31, 2017 USD ($) EquityInstruments
Number of awards
Outstanding at the beginning of the period | EquityInstruments		67,475
Granted during the period | EquityInstruments	24,608	24,608
Vested during the period | EquityInstruments		(16,999)
Outstanding at end of the period | EquityInstruments		75,084	67,475
Weighted average contractual life
Outstanding		1 year 9 months	1 year 4 months 17 days
Aggregate fair value
Outstanding at the beginning of the period | $		$ 1,429
Granted during the period | $		576
Vested during the period | $		(410)
Outstanding at the end of the period | $		$ 1,595	$ 1,429

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Share-Based Compensation - PCUs movement (Details) - PCUs $ in Thousands		6 Months Ended	12 Months Ended
	Apr. 02, 2018 EquityInstruments	Jun. 30, 2018 USD ($) EquityInstruments	Dec. 31, 2017 USD ($) EquityInstruments
Number of awards
Outstanding at the beginning of the period | EquityInstruments		67,475
Granted during the period | EquityInstruments	24,608	24,608
Vested during the period | EquityInstruments		(16,999)
Outstanding at end of the period | EquityInstruments		75,084	67,475
Weighted average contractual life
Outstanding		1 year 9 months	1 year 4 months 17 days
Aggregate fair value
Outstanding at the beginning of the period | $		$ 1,429
Granted during the period | $		576
Vested during the period | $		(410)
Outstanding at the end of the period | $		$ 1,595	$ 1,429

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Share-Based Compensation - Expense and liability (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Share-Based Compensation
Total expense recognized	$ 1,329	$ 1,223	$ 2,515	$ 2,235
Other Noncurrent Liabilities
Share-Based Compensation
Total accrued cash distribution	$ 764		$ 764		$ 814

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Earnings/(losses) per share ("EPS") (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Basic (loss)/earnings per share
(Loss)/profit for the period attributable to owners of the Group	$ (3,620)	$ (7,515)	$ 15,684	$ 1,237
Plus/(Less): Dividends on Preference Shares	(2,516)	(2,516)	(5,032)	(5,031)
(Loss)/profit for the period available to owners of the Group	$ (6,136)	$ (10,031)	$ 10,652	$ (3,794)
Weighted average number of shares outstanding, basic	80,801,654	80,624,124	80,758,631	80,592,912
Basic (loss)/earnings per share	$ (0.08)	$ (0.12)	$ 0.13	$ (0.05)
Diluted loss per share
(Loss)/profit for the period available to owners of the Group used in the calculation of diluted loss per share	$ (6,136)	$ (10,031)	$ 10,652	$ (3,794)
Weighted average number of shares outstanding, basic	80,801,654	80,624,124	80,758,631	80,592,912
Dilutive potential ordinary shares			732,041
Weighted average number of shares used in the calculation of diluted loss per share	80,801,654	80,624,124	81,490,672	80,592,912
Diluted (loss)/earnings per share	$ (0.08)	$ (0.12)	$ 0.13	$ (0.05)
SARs
Diluted loss per share
Anti-dilutive Potential Ordinary shares	971,911	2,153,024	971,911	2,153,024
RSUs
Diluted loss per share
Anti-dilutive Potential Ordinary shares		438,595		438,595

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Subsequent Events (Details)	Aug. 01, 2018 $ / shares
Subsequent Events
Declaration of quarterly cash dividend (per share)	$ 0.15