Exhibit EX-99

99.1

Announcement on 2016/01/05: Represent subsidiary United Semiconductor (Xiamen) Co., Ltd.to announce related materials on acquisition of machinery and equipment

99.2

Announcement on 2016/01/07: Represent subsidiary United Semiconductor (Xiamen) Co., Ltd.to announce related materials on acquisition of machinery and equipment

99.3

Announcement on 2016/01/07: Represent subsidiary United Semiconductor (Xiamen) Co., Ltd.to announce related materials on acquisition of machinery and equipment

99.4

Announcement on 2016/01/13: Represent subsidiary United Semiconductor (Xiamen) Co., Ltd.to announce related materials on acquisition of machinery and equipment

99.5

Announcement on 2016/01/19: Represent subsidiary United Semiconductor (Xiamen) Co., Ltd.to announce related materials on acquisition of machinery and equipment

99.8

Announcement on 2016/01/08: the trading and pledge of UMC common shares by directors, executive officers and 10% shareholders of UMC

Represent subsidiary United Semiconductor (Xiamen) Co., Ltd.to announce related materials on
acquisition of machinery and equipment

1. Name and nature of the subject matter (e.g. land located at Sublot XX, Lot XX, North District, Taichung City): Machinery and equipment
2. Date of the occurrence of the event: 2016/01/01~2016/01/05
3. Transaction volume (e.g. XX square meters, equivalent to XX p’ing), unit price, total Transaction volume: one batch; average unit price: $$1,050,822,750 NTD; total transaction price: $ $1,050,822,750 NTD
4. Counterparty to the trade and its relationship with the company (if the trading counterpart is a natural person and is not an actual related party of the Company, the name of the trading counterpart is not required to be disclosed): KLA-TENCOR CORPORATION; non-related party transaction
5. Where the counterpart to the trade is an actual related party, a public announcement shall also include the reason for choosing the related party as trading counterpart and the identity of the previous owner (including its relationship with the company and the trading counterpart), price of transfer and the date of acquisition: Not applicable
6. Where a person who owned the property within the past five years has been an actual related person of the company, a public announcement shall also include the dates and prices of acquisition and disposal by the related person and the person’s relationship to the company at those times: Not applicable
7. Anticipated loss or profit from the disposal (not applicable in cases of acquisition of assets) (where originally deferred, the status or recognition shall be stated and explained): Not applicable
8. Terms of delivery or payment (including payment period and monetary amount): Base on purchase order payment term.
9. The manner of deciding on this transaction (such as tender invitation, price comparison, or price negotiation), the reference basis for the decision on price and the decision-making department: transaction: price negotiation; the reference basis for the decision on price: market price. The decision-making department: the Selection Meeting
10. Name of the professional appraisal institution and its appraisal amount: Not applicable
11. Reason for any significant discrepancy with the transaction amount, and opinion of the certifying CPA: Not applicable
12. Is the appraisal report price a limited price or specific price? : Not applicable
13. Has an appraisal report not yet been obtained? : Not applicable
14. Reason an appraisal report has not yet been obtained: Not applicable
15. Broker and broker’s fee: None
16. Concrete purpose or use of the acquisition or disposition: For production
17. Do the directors have any objection to the present transaction? : Not applicable
18. Any other matters that need to be specified: None

Represent subsidiary United Semiconductor (Xiamen) Co., Ltd.to announce related materials on
acquisition of machinery and equipment

1. Name and nature of the subject matter (e.g. land located at Sublot XX, Lot XX, North District, Taichung City): Machinery and equipment
2. Date of the occurrence of the event: 2015/12/25~2016/01/07
3. Transaction volume (e.g. XX square meters, equivalent to XX p’ing), unit price, total Transaction volume: one batch; average unit price: NT$823,350,000 NTD; total transaction price: NT$823,350,000 NTD
4. Counterparty to the trade and its relationship with the company (if the trading counterpart is a natural person and is not an actual related party of the Company, the name of the trading counterpart is not required to be disclosed): Applied Materials South East Asia Pte. Ltd.; non-related party transaction
5. Where the counterpart to the trade is an actual related party, a public announcement shall also include the reason for choosing the related party as trading counterpart and the identity of the previous owner (including its relationship with the company and the trading counterpart), price of transfer and the date of acquisition: Not applicable
6. Where a person who owned the property within the past five years has been an actual related person of the company, a public announcement shall also include the dates and prices of acquisition and disposal by the related person and the person’s relationship to the company at those times: Not applicable
7. Anticipated loss or profit from the disposal (not applicable in cases of acquisition of assets) (where originally deferred, the status or recognition shall be stated and explained): Not applicable
8. Terms of delivery or payment (including payment period and monetary amount): Base on purchase order payment term.
9. The manner of deciding on this transaction (such as tender invitation, price comparison, or price negotiation), the reference basis for the decision on price and the decision-making department: transaction: price negotiation; the reference basis for the decision on price: market price. The decision-making department: the Selection Meeting
10. Name of the professional appraisal institution and its appraisal amount: Not applicable
11. Reason for any significant discrepancy with the transaction amount, and opinion of the certifying CPA: Not applicable
12. Is the appraisal report price a limited price or specific price? : Not applicable
13. Has an appraisal report not yet been obtained? : Not applicable
14. Reason an appraisal report has not yet been obtained: Not applicable
15. Broker and broker’s fee: None
16. Concrete purpose or use of the acquisition or disposition: For production
17. Do the directors have any objection to the present transaction? : Not applicable
18. Any other matters that need to be specified: None

Represent subsidiary United Semiconductor (Xiamen) Co., Ltd.to announce related materials on
acquisition of machinery and equipment

1. Name and nature of the subject matter (e.g. land located at Sublot XX, Lot XX, North District, Taichung City): Machinery and equipment
2. Date of the occurrence of the event: 2015/12/30~2016/01/07
3. Transaction volume (e.g. XX square meters, equivalent to XX p’ing), unit price, total Transaction volume: one batch; average unit price: NT$1,158,318,280 NTD; total transaction price: NT$1,158,318,280 NTD
4. Counterparty to the trade and its relationship with the company (if the trading counterpart is a natural person and is not an actual related party of the Company, the name of the trading counterpart is not required to be disclosed): MURATA MACHINERY, LTD.; non-related party transaction
5. Where the counterpart to the trade is an actual related party, a public announcement shall also include the reason for choosing the related party as trading counterpart and the identity of the previous owner (including its relationship with the company and the trading counterpart), price of transfer and the date of acquisition: Not applicable
6. Where a person who owned the property within the past five years has been an actual related person of the company, a public announcement shall also include the dates and prices of acquisition and disposal by the related person and the person’s relationship to the company at those times: Not applicable
7. Anticipated loss or profit from the disposal (not applicable in cases of acquisition of assets) (where originally deferred, the status or recognition shall be stated and explained): Not applicable
8. Terms of delivery or payment (including payment period and monetary amount): Base on purchase order payment term.
9. The manner of deciding on this transaction (such as tender invitation, price comparison, or price negotiation), the reference basis for the decision on price and the decision-making department: transaction: price negotiation; the reference basis for the decision on price: market price. The decision-making department: the Selection Meeting
10. Name of the professional appraisal institution and its appraisal amount: Not applicable
11. Reason for any significant discrepancy with the transaction amount, and opinion of the certifying CPA: Not applicable
12. Is the appraisal report price a limited price or specific price? : Not applicable
13. Has an appraisal report not yet been obtained? : Not applicable
14. Reason an appraisal report has not yet been obtained: Not applicable
15. Broker and broker’s fee: None
16. Concrete purpose or use of the acquisition or disposition: For production
17. Do the directors have any objection to the present transaction? : Not applicable
18. Any other matters that need to be specified: None

Represent subsidiary United Semiconductor (Xiamen) Co., Ltd.to announce related materials on
acquisition of machinery and equipment

1. Name and nature of the subject matter (e.g. land located at Sublot XX, Lot XX, North District, Taichung City): Machinery and equipment
2. Date of the occurrence of the event: 2016/01/08~2016/01/13
3. Transaction volume (e.g. XX square meters, equivalent to XX p’ing), unit price, total Transaction volume: one batch; average unit price: NT$736,230,000 NTD; total transaction price: NT$736,230,000 NTD
4. Counterparty to the trade and its relationship with the company (if the trading counterpart is a natural person and is not an actual related party of the Company, the name of the trading counterpart is not required to be disclosed): Applied Materials South East Asia Pte. Ltd.; non-related party transaction
5. Where the counterpart to the trade is an actual related party, a public announcement shall also include the reason for choosing the related party as trading counterpart and the identity of the previous owner (including its relationship with the company and the trading counterpart), price of transfer and the date of acquisition: Not applicable
6. Where a person who owned the property within the past five years has been an actual related person of the company, a public announcement shall also include the dates and prices of acquisition and disposal by the related person and the person’s relationship to the company at those times: Not applicable
7. Anticipated loss or profit from the disposal (not applicable in cases of acquisition of assets) (where originally deferred, the status or recognition shall be stated and explained): Not applicable
8. Terms of delivery or payment (including payment period and monetary amount): Base on purchase order payment term.
9. The manner of deciding on this transaction (such as tender invitation, price comparison, or price negotiation), the reference basis for the decision on price and the decision-making department: transaction: price negotiation; the reference basis for the decision on price: market price. The decision-making department: the Selection Meeting
10. Name of the professional appraisal institution and its appraisal amount: Not applicable
11. Reason for any significant discrepancy with the transaction amount, and opinion of the certifying CPA: Not applicable
12. Is the appraisal report price a limited price or specific price?: Not applicable
13. Has an appraisal report not yet been obtained? : Not applicable
14. Reason an appraisal report has not yet been obtained: Not applicable
15. Broker and broker’s fee: None
16. Concrete purpose or use of the acquisition or disposition: For production
17. Do the directors have any objection to the present transaction? : Not applicable

Represent subsidiary United Semiconductor (Xiamen) Co., Ltd.to announce related materials on
acquisition of machinery and equipment

1. Name and nature of the subject matter (e.g. land located at Sublot XX, Lot XX, North District, Taichung City): Machinery and equipment
2. Date of the occurrence of the event: 2016/01/14~2016/01/19
3. Transaction volume (e.g. XX square meters, equivalent to XX p’ing), unit price, total Transaction volume: one batch; average unit price: NT$ 651,477,750 NTD; total transaction price: NT$ 651,477,750 NTD
4. Counterparty to the trade and its relationship with the company (if the trading counterpart is a natural person and is not an actual related party of the Company, the name of the trading counterpart is not required to be disclosed): Applied Materials South East Asia Pte. Ltd.; non-related party transaction
5. Where the counterpart to the trade is an actual related party, a public announcement shall also include the reason for choosing the related party as trading counterpart and the identity of the previous owner (including its relationship with the company and the trading counterpart), price of transfer and the date of acquisition: Not applicable
6. Where a person who owned the property within the past five years has been an actual related person of the company, a public announcement shall also include the dates and prices of acquisition and disposal by the related person and the person’s relationship to the company at those times: Not applicable
7. Anticipated loss or profit from the disposal (not applicable in cases of acquisition of assets) (where originally deferred, the status or recognition shall be stated and explained): Not applicable
8. Terms of delivery or payment (including payment period and monetary amount): Base on purchase order payment term.
9. The manner of deciding on this transaction (such as tender invitation, price comparison, or price negotiation), the reference basis for the decision on price and the decision-making department: transaction: price negotiation; the reference basis for the decision on price: market price. The decision-making department: the Selection Meeting
10. Name of the professional appraisal institution and its appraisal amount: Not applicable
11. Reason for any significant discrepancy with the transaction amount, and opinion of the certifying CPA: Not applicable
12. Is the appraisal report price a limited price or specific price? : Not applicable
13. Has an appraisal report not yet been obtained? : Not applicable
14. Reason an appraisal report has not yet been obtained: Not applicable
15. Broker and broker’s fee: None
16. Concrete purpose or use of the acquisition or disposition: For production
17. Do the directors have any objection to the present transaction? : Not applicable

1. Date of the investor conference: 2016/01/27
2. Time of the investor conference: 17:00
3. Location of the investor conference: Online teleconference
4. Brief information disclosed in the investor conference: UMC Q4 2015 Financial and Operating Results.
5. The presentation of the investor conference release: It will be released after the investor conference.
6. Will the presentation be released in the Company’s website: Yes, please refer to the Company’s website at www.umc.com
7. Any other matters that need to be specified: None

This is to report the changes or status of 1) Sales volume, 2) Funds lent to other parties, 3) Endorsements and guarantees, and 4) Financial derivative transactions for the period of December 2015.


Period	Items	2015		2014		Changes			%
December	Net sales		10,673,034		12,204,351		(1,531,317	)		(12.55	%)
Year-to-Date	Net sales		144,830,421		140,012,076		4,818,345			3.44	%

Last Month

This Month

(actual amount

Balance as of period end

(actual amount provided)

provided)

Limit of lending

UMC

1,700,000

44,404,230

Note : On December 24, 2014, the board of directors resolved to provide endorsement to Nexpower’s syndicated loan from banks including Bank of Taiwan for the amount up to NT$ 17,400 million.

This is to report 1) the trading of directors, executive officers and 10% shareholders of United Microelectronics Corporation (“UMC”) (NYSE: UMC); 2) the pledge and clear of pledge of UMC common shares by directors, executive officers and 10% shareholders of UMC;


		Number of		Number of shares as
		shares as of		of December 31,
Title	Name	November30, 2015		2015		Changes
Vice President	Arthur Kuo		84,000		96,000		12,000

Vice President	TR Yew		189,022		239,022		50,000

Vice President	S S Hong		576,406		636,406		60,000

Vice President	Jin Jwang Wu		104,000		150,300		46,300

Vice President	Jerry CJ Hu		40,000		60,000		20,000

The pledge and clear of pledge of UMC common shares by directors, executive officers and 10% shareholders:

Number of shares

pledged as of

Title

Name

November 30, 2015

December 31, 2015

Changes

—