Exhibit 4.112

STOCK PURCHASE AGREEMENT

This Stock Purchase Agreement (this "Agreement") is entered into as of April 5, 2016 by and between DryShips Inc., a Marshall Islands corporation (the "Seller"), and Ocean Rig Investments, Inc., a Marshall Islands corporation (the "Buyer").

RECITALS

The Seller desires to sell to the Buyer, and the Buyer desires to purchase from the Seller, 56,079,533 shares of common stock, $0.01 par value per share (the "Common Stock"), of Ocean Rig UDW Inc., a Marshall Islands corporation and the parent of the Buyer ("ORIG"), (the "Shares"), at a price of $0.89 per Share.

AGREEMENT

NOW, THEREFORE, in consideration of the respective representations, warranties and agreements contained herein and for other good and valuable consideration the receipt and adequacy of which are hereby acknowledged, the Seller and the Buyer hereby agree as follows:

ARTICLE 1

STOCK PURCHASE AND CLOSING

1.1Stock Purchase. At the Closing (as defined below), subject to the terms and conditions herein contained, the Seller shall sell, convey, transfer, assign and deliver to the Buyer, and the Buyer shall purchase and acquire, the Shares, together with all rights and interests associated therewith.

1.2Purchase Price. As consideration for the purchase of the Shares at the Closing, the Buyer shall pay to the Seller an aggregate purchase price (the "Purchase Price") of $49,910,784 payable by wire transfer or by delivery of other immediately available funds to an account designated by the Seller in writing.

1.3Closings. The consummation of the purchase and sale of the Shares (the "Closing") shall take place at the offices of Seward & Kissel LLP, One Battery Park Plaza, New York NY 10004, on the date hereof or on such later date as may be mutually agreed upon by the Seller and the Buyer (the "Closing Date").

1.4Deliveries. At the Closing, to make the applicable transfer referred to in Section 1.1 and the delivery of the applicable consideration described in Section 1.2, the Seller and the Buyer shall deliver the following:

1.4.1The Seller shall deliver to the Buyer the Shares free and clear of any and all charges, claims, conditions, encumbrances, equitable interests, liens, mortgages, options, pledges, rights of refusal, security interests or restrictions of any kind, including any restrictions on use, voting, transfer, receipt of income, or exercise of any other attribute of ownership, in each case of any nature whatsoever (collectively, "Liens"), except for any restrictions on the resale of the Shares under the Securities Act of 1933, as amended (the "Securities Act") or under applicable state securities laws ("Permitted Liens"), together with stock powers duly executed in blank, in proper form for transfer, together with any necessary assignment documents in form and substance as reasonably requested by the Buyer.

1.4.2The Buyer shall pay the Purchase Price to the Seller as provided in Section 1.2.

ARTICLE 2

REPRESENTATIONS AND WARRANTIES OF SELLER

The Seller represents and warrants to the Buyer that the statements in the following sections of this Article 2 are true and correct as of the date of this Agreement and as of the Closing Date:

2.1Organization, Good Standing. The Seller is duly organized, validly existing and in good standing under the laws of its jurisdiction of formation, and has all requisite power and authority to carry on its business and to own, lease, operate and hold its properties and assets.

2.2Authority. The Seller has the full legal right and requisite power and authority and has taken all action necessary in order to execute, deliver and perform fully its obligations under this Agreement and to consummate the transactions contemplated herein.

2.3No Conflicts. The execution, delivery and performance by the Seller of this Agreement will not (a) violate any provision of the Seller's governing documents, (b) require any authorization, consent, approval, license, exemption of or filing or registration with any national, federal, regional, state, multi-state, municipal or other governmental authority of any nature, including any court, subdivision, agency, commission or authority thereof, or any quasi-governmental body exercising any regulatory or taxing authority (any such governmental authority or body, a "Governmental Body"), by the Seller, except for filings under the Securities Exchange Act of 1934, as amended, and the rules and regulations thereunder ("Exchange Act"), which Seller will make as required under the Exchange Act following the execution of this Agreement, or (c) cause the Seller to violate or contravene any provision of law, any rule or regulation of any Governmental Body, or any order, writ, judgment, injunction, decree, determination or award, binding upon or applicable to the Seller.

2.4Binding Obligation. This Agreement has been duly authorized, executed and delivered by the Seller and constitutes a valid and binding agreement of the Seller, enforceable against the Seller in accordance with its terms, subject to bankruptcy, insolvency, fraudulent transfer, reorganization, moratorium and other similar laws of general applicability relating to or affecting creditors' rights and to general equity principles.

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2.5Ownership of Common Stock. Immediately prior to the consummation of the transactions contemplated herein, the Seller will be the sole legal and record owner and holder of, and will have good, valid and marketable title to and the right to transfer, the Shares, free and clear of any Liens (other than Permitted Liens).  Upon the consummation of the transactions contemplated herein, the Buyer will be the sole legal, beneficial and record owner and holder of, and will have good and valid title to the Shares, free and clear of all Liens (other than Permitted Liens).  Immediately prior to the consummation of the transactions contemplated herein, the Seller will not be subject to any agreement, contract, voting trust, understanding, option, warrant or other right (including conversion, exchange or preemptive rights or rights of first refusal) with respect to the Shares.

2.6No Litigation. There is no suit, action, investigation, inquiry or other proceeding pending or, to its knowledge, threatened against the Seller that challenges, or has the effect of interfering with, the validity or legality of the transactions contemplated in this Agreement.

2.7Restricted Securities. The Shares are restricted securities, as defined in Rule 144(a)(3) of the Securities Act. The Seller has acquired and fully paid for the Shares and (i) was an accredited investor, as defined in Rule 501 of the Securities Act, on the date that it acquired the Shares, and (ii) acquired the Shares as principal for investment for its own account and not with a view to any distribution or resale of the Shares in violation of the Securities Act.

2.8Exemption from Registration. Assuming the accuracy of the Buyer's representations and warranties in Sections 3.6 and 3.7, the Shares are being offered and sold pursuant to an exemption from the registration requirements of the Securities Act.

2.9Manner of Offering. In connection with the offer and sale of the Shares, neither the Seller, any affiliate of the Seller nor any person acting on the Seller's or such affiliates' behalf has engaged in any form of general solicitation or general advertising, as those terms are used in Rule 502(c) of the Securities Act.

2.10Independent Analysis.

2.10.1The Seller is an accredited investor, as defined in Rule 501 of the Securities Act.

2.10.2The Seller acknowledges that the Buyer has not rendered any opinion or expressed any view to the Seller as to whether the sale of the Shares is prudent or suitable, and the Seller is not relying on any representation or warranty by the Buyer except as expressly set forth in this Agreement.

2.10.3The Seller is a sophisticated investor with respect to the Shares and the transactions contemplated in this Agreement and it has adequate information concerning the business, condition (financial or otherwise), prospects and plans of the Buyer and its affiliates, and understands the disadvantages to which it may be subject on account of the disparity of information as between the parties. The Seller acknowledges, by reason of its business and financial experience, that it is capable of evaluating the merits and risks of the sale of the Shares and of protecting its own interests in connection with sale of the Shares.

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2.10.4The Seller acknowledges that the Buyer may possess material non-public information not known to the Seller regarding or relating to ORIG, the Buyer or the Shares, including, but not limited to, information concerning the business, condition (financial or otherwise), prospects or plans of the Buyer. The Seller further acknowledges that neither the Buyer, ORIG nor any of their respective affiliates shall have any liability whatsoever (and the Seller hereby waives and releases all claims that it may otherwise have) with respect to the nondisclosure of any such information, whether before or after the date of this Agreement.

2.10.5The Seller acknowledges that it has had access to all information regarding ORIG, the Buyer and its business, condition (financial or otherwise), prospects and plans that it reasonably considers important in making its decision to sell the Shares, and it has had ample opportunity to ask questions of the appropriate persons concerning such matters. In this regard, the Seller acknowledges that it has had a preexisting business relationship with ORIG and the Buyer of a nature and duration sufficient to make it aware of the business, condition (financial or otherwise), prospects and plans of ORIG and the Buyer.

2.11No Brokers or Finders. No broker or finder has been engaged by the Seller in connection with the transactions contemplated in this Agreement, and no commission, finder's fees or other similar compensation or remuneration is payable to any person as a result of the Seller's actions in connection with the execution and delivery of this Agreement or the consummation of the transactions contemplated herein.

ARTICLE 3

REPRESENTATIONS AND WARRANTIES OF BUYER

The Buyer represents and warrants to the Seller that the statements in the following sections of this Article 3 are true and correct as of the date of this Agreement and as of the Closing Date:

3.1Organization, Good Standing. The Buyer is duly organized, validly existing and in good standing under the laws of the Republic of the Marshall Islands, and has all requisite power and authority to carry on its business and to own, lease, operate and hold its properties and assets.

3.2Authority. The Buyer has the full legal right and requisite power and authority and has taken all action necessary in order to execute, deliver and perform fully its obligations under this Agreement and to consummate the transactions contemplated herein.

3.3No Conflicts. The execution, delivery and performance by the Buyer of this Agreement will not (a) violate any provision of the Buyer's governing documents, (b) require any authorization, consent, approval, license, exemption of or filing or registration with any Governmental Body by the Buyer, except for filings under the Exchange Act, which the Buyer will make as required under the Exchange Act following the execution of this Agreement, (c) cause the Buyer to violate or contravene any provision of law, any rule or regulation of any Governmental Body, or any order, writ, judgment, injunction, decree, determination or award, binding upon or applicable to the Buyer, or (d) result in a material violation or breach of, or constitute (with or without notice or the lapse of time or both) a material default or an event of default under, or result in materially adverse consequences to the Buyer under, any indenture, mortgage, bond, contract, license, agreement, permit, instrument or other obligation to which Buyer is a party or by which the Buyer is bound or affected.

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3.4Binding Obligation. This Agreement has been duly authorized, executed and delivered by the Buyer and constitutes a valid and binding agreement of the Buyer, enforceable against the Buyer in accordance with its terms, subject to bankruptcy, insolvency, fraudulent transfer, reorganization, moratorium and other similar laws of general applicability relating to or affecting creditors' rights and to general equity principles.

3.5No Litigation. There is no suit, action, investigation, inquiry or other proceeding pending or, to its knowledge, threatened against the Buyer that challenges, or has the effect of interfering with, the validity or legality of the transactions contemplated in this Agreement.

3.6Purchase for Own Account. The Shares to be purchased by the Buyer hereunder are being acquired for investment for the Buyer's own account in the manner set forth herein and not with a view to any distribution or resale of the Shares in violation of the Securities Act.

3.7Accredited Investor Status. The Buyer is an accredited investor, as defined in Rule 501 of the Securities Act, and is capable of evaluating the merits and risks of an investment in the Shares as contemplated herein. The Buyer acknowledges that it is able to bear the economic risks associated with such an investment and is able to afford a complete loss of such investment.

3.8Independent Analysis. The Buyer (i) has adequate information to make an informed decision regarding a purchase of the Shares as contemplated herein and (ii) has independently and without reliance upon the Seller, and based on such information as the Buyer has deemed appropriate, made its own analysis and decision to enter into this Agreement, except that the Buyer has relied upon the Seller's express representations, warranties, covenants and indemnities in this Agreement. The Buyer acknowledges that the Seller is a substantial shareholder of ORIG and, therefore, may possess material non-public information not known to certain members of Buyer's or ORIG's management regarding or relating to the Buyer or the Shares, including, but not limited to, information concerning the business, condition (financial or otherwise), prospects or plans of ORIG or the Buyer. The Buyer further acknowledges that neither the Seller nor any of its affiliates shall have any liability whatsoever (and the Buyer hereby waives and releases all claims that it may otherwise have) with respect to the nondisclosure of any such information, whether before or after the date of this Agreement.

3.9No Brokers or Finders. No broker or finder has been engaged by the Buyer in connection with the transactions contemplated in this Agreement, and no commission, finder's fees or other similar compensation or remuneration is payable to any person as a result of the Buyer's actions in connection with the execution and delivery of this Agreement or the consummation of the transactions contemplated herein.

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ARTICLE 4

SELLER'S CONDITIONS TO CLOSING

At the Closing, the obligation of the Seller to sell the Shares to the Buyer is subject to the fulfillment at the Closing of the following conditions:

4.1Representations and Warranties; Compliance. The representations and warranties of the Buyer contained in Article 3 of this Agreement shall be true and correct in all material respects at and as of such Closing as though then made, and Buyer shall have performed and complied in all material respects with all conditions and agreements required by this Agreement to be performed and complied with by it on or prior to the Closing Date.

4.2Legal Investment. On the Closing Date, the purchase and sale of the Shares shall be permitted by the laws and regulations of each relevant jurisdiction.

4.3No Actions Pending. There shall be no suit, action, investigation, inquiry or other proceeding by any Governmental Body or other person or entity pending or threatened in writing that challenges, or has the effect of interfering with, the validity or legality of the transactions contemplated in this Agreement.

ARTICLE 5

BUYER'S CONDITIONS TO CLOSING

The obligation of the Buyer to purchase the Shares from the Seller is subject to the fulfillment at the Closing of the following conditions:

5.1Representations and Warranties; Compliance. The representations and warranties of the Seller contained in Article 2 of this Agreement shall be true and correct in all material respects at and as of such Closing as though then made, and the Seller shall have performed and complied in all material respects, with all conditions and agreements required by this Agreement to be performed and complied with by it on or prior to the Closing Date.

5.2Legal Investment. On the Closing Date, the purchase and sale of the Shares shall be permitted by the laws and regulations of each relevant jurisdiction.

5.3No Actions Pending. There shall be no suit, action, investigation, inquiry or other proceeding by any Governmental Body or other person or entity pending or threatened in writing that challenges, or has the effect of interfering with, the validity or legality of the transactions contemplated in this Agreement.

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ARTICLE 6

TERMINATION

6.1Termination. This Agreement may be terminated by written agreement of the Seller and the Buyer at any time.

6.2No Further Liability. If this Agreement is terminated by the Seller and the Buyer pursuant to this Article 6, (a) neither party shall have any further obligation or liability under this Agreement, other than by reason of a breach or default by a party hereunder and (b) any monies, instruments or documents of any party held in escrow or transferred to the other party in connection with the transactions contemplated herein with respect to which the Closing shall not have occurred shall be immediately returned to such party. For the avoidance of doubt, any such termination shall not have any effect whatsoever on any transactions contemplated herein with respect to which the Closing has occurred. Section 6.2 and Article 7 shall survive any termination of this Agreement.

ARTICLE 7

MISCELLANEOUS

7.1Indemnification by Seller. The Seller will indemnify and hold harmless the Buyer, ORIG and their respective directors, officers, partners, principals and affiliates with respect to any and all losses, liabilities, damages, or expenses (including, without limitation, reasonable attorneys' fees and disbursements) (collectively, "Damages") arising from the breach of any of the representations, warranties or agreements made hereunder by the Seller or arising from Buyer enforcing its rights under this Agreement.

7.2Indemnification by Buyer. The Buyer will indemnify and hold harmless the Seller and its directors, officers, partners, principals and affiliates with respect to any and all Damages arising from the breach of any of the representations, warranties or agreements made hereunder by the Buyer or arising from Seller enforcing its rights under this Agreement.

7.3Survival. The representations, warranties and agreements of the parties shall survive the Closing. No investigation by or any knowledge of any party or its directors, officers, employees, agents or representatives with respect to the other party or the Shares or any fact, matter or circumstance shall affect or limit the representations and warranties received by that party under this Agreement.

7.4Expenses. Each of the parties agrees to pay its own expenses incident to this Agreement and the performance of its obligations hereunder, except as provided in Section 7.1.

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7.5Satisfaction of Conditions; Further Assurances. The parties shall use their respective commercially reasonable efforts to satisfy the closing conditions set forth herein and otherwise promptly effectuate the transactions contemplated in this Agreement as promptly as practicable. Following the Closing, the Seller and the Buyer, promptly after the request of the other party, will take all appropriate action and execute all documents, instruments or conveyances of any kind which may be reasonably necessary or advisable to effectuate the transactions contemplated in this Agreement or carry out any of the provisions hereof.

7.6Assignment. Neither this Agreement nor any of the rights or obligations herein may be assigned by the Seller without the prior written consent of the Buyer, or by the Buyer without the prior written consent of the Seller, and any attempt to assign this Agreement or any of the rights or obligations herein other than pursuant to the terms hereof shall be null and void. Subject to the foregoing, this Agreement shall be binding upon and inure to the benefit of the parties hereto and their respective successors and permitted assigns, and no other person shall have any right, benefit or obligation hereunder.

7.7Notices. Any notice, request, instruction or other document to be given hereunder by any party to the other shall be in writing and delivered in person or by courier or by facsimile transmission or mailed by certified mail, postage prepaid, return receipt requested, as follows:

If to the Seller:	DryShips Inc.Omega Building80, Kifissias AvenueGR-151 25 AmaroussionGreece Attention: Ziad Nakhleh Facsimile:  011 30 210 80 90 575
With a copy (which shall
not constitute notice) to:	Seward & Kissel LLP One Battery Park Plaza New York, NY  10004 Attention:  Edward S. Horton, Esq. Facsimile:  212-480-8421
If to the Buyer:	Ocean Rig Investments, Inc. c/o Ocean Rig UDW Inc. 10 Skopa Street Tribune House, 2nd Floor, Office 202 CY 1075 Nicosia, Cyprus Attention:  Mr. Ioannis Cleanthous Facsimile:  +357 22761542
With a copy (which shall
not constitute notice) to:	Seward & Kissel LLP One Battery Park Plaza New York, NY  10004 Facsimile:  212-480-8421 Attention:  Gary J. Wolfe, Esq.

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or to such other place and with such other copies as either party may designate as to itself by written notice to the other. All such notices, requests, instructions or other documents shall be deemed to have been delivered (i) in the case of personal delivery or delivery by courier, on the date of such delivery, (ii) in the case of delivery by facsimile transmission, when receipt is acknowledged and (iii) in the case of mailing, on the third business day after the posting thereof.

7.8Counterparts. This Agreement may be executed in two or more counterparts, and all such counterparts shall be deemed an original, shall be construed together and shall constitute one and the same instrument.

7.9Choice of Law. This Agreement shall be construed, interpreted and the rights of the parties determined in accordance with the laws of the State of New York, without regard to principles of conflicts of law.

7.10Jurisdiction. Each of the Seller and the Buyer (i) irrevocably submits to the co-exclusive jurisdiction of the United States District Court sitting in the Southern District of New York and the courts of the State of New York located in New York County for the purposes of any suit, action or proceeding arising out of or relating to this Agreement and (ii) waives, and agrees not to assert in any such suit, action or proceeding, any claim that it is not personally subject to the jurisdiction of such court, that the suit, action or proceeding is brought in an inconvenient forum or that the venue of the suit, action or proceeding is improper. Each of the Seller and the Buyer consents to process being served in any such suit, action or proceeding by mailing a copy thereof to such party at the address set forth in Section 7.7 and agrees that such service shall constitute good and sufficient service of process and notice thereof. Nothing in this Section 7.10 shall affect or limit any right to serve process in any other manner permitted by law.

7.11WAIVER OF JURY TRIAL. TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW, EACH OF THE PARTIES HERETO HEREBY IRREVOCABLY WAIVES ALL RIGHTS TO A TRIAL BY JURY IN ANY ACTION, PROCEEDING OR COUNTERCLAIM ARISING OUT OF OR RELATING TO THIS AGREEMENT OR THE TRANSACTIONS CONTEMPLATED HEREIN.

7.12Remedies. In addition to any remedies either party may have in law, each party shall be entitled to apply to any court of competent jurisdiction (without posting bond or other security) to enjoin any actual or threatened breach or default under this Agreement and shall also be entitled to seek specific performance of this Agreement. The remedies provided for herein are cumulative and are not exclusive of any remedies that may be available to any party at law or in equity or otherwise.

7.13Entire Agreement; Amendments and Waivers. This Agreement constitutes the entire agreement between the parties pertaining to the subject matter hereof and supersedes all prior agreements, understandings, negotiations and discussions, whether oral or written, of the parties. No supplement, modification, amendment or waiver of this Agreement shall be binding unless executed in writing by the party to be bound thereby. No waiver of any of the provisions of this Agreement shall be deemed or shall constitute a waiver of any other provision hereof (whether or not similar) nor shall such waiver constitute a continuing waiver unless otherwise expressly provided.

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7.14Severability of Provisions. Any provision of this Agreement which is prohibited or unenforceable in any jurisdiction shall, as to such jurisdiction, be ineffective to the extent of such prohibition or unenforceability without invalidating the remaining provisions hereof or affecting the validity or enforceability of such provision in any other jurisdiction.

7.15No Third Party Beneficiary Rights. No provisions of this Agreement are intended, nor will be interpreted, to provide or create any third party beneficiary rights or other rights of any kind in any client, customer, affiliate, stockholder, member, or partner of any party hereto or any other person or entity unless specifically provided otherwise herein, and, except as so provided, all provisions hereof will be personal solely between the parties hereto.

IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be duly executed on their respective behalf by their respective officers or other representatives thereunto duly authorized, as of the day and year above written.

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Seller:		Buyer:
DRYSHIPS INC.		OCEAN RIG INVESTMENTS, INC.
By:	/s/ Ziad Nakhleh	By:	/s/ Dr. Adriano Cefai
	Name: Ziad Nakhleh Title: Chief Financial Officer		Name: Dr. Adriano Cefai Title: Director of Omega Services Limited, Sole Director

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