EX-10.5





 Exhibit 10.5 

REGISTRATION RIGHTS AGREEMENT 

This Registration Rights Agreement (including all exhibits hereto and as may be amended, supplemented or amended and restated from time to
time in accordance with the terms hereof, this “Agreement”) is made and entered into as of April 23, 2021, by and among Diamond Offshore Drilling, Inc. (the “Company”), the other parties signatory hereto and
any additional parties identified on the signature pages of any joinder executed substantially in the form set forth in Exhibit A hereto and delivered pursuant hereto. 

WHEREAS, on January 22, 2021, the Company and its affiliated debtors and debtors in possession filed that certain Joint Chapter 11 Plan
of Reorganization of Diamond Offshore Drilling, Inc. and its Debtor Affiliates, Chapter 11 Case No. 20-32307 (DRJ) (as may be amended or supplemented from time to time in accordance with its terms, the
“Plan”) in the United States Bankruptcy Court for the Southern District of Texas; 
 WHEREAS, pursuant to the Plan, the
Company has entered into a backstop and private placement agreement (as amended or supplemented, the “Backstop Agreement”), dated as of January 22, 2021, with each of the financing parties and investors listed on the signature
pages thereto, which provided that the Company will enter into a registration rights agreement at the request of certain holders that receive New Diamond Common Shares (as defined below); and 

WHEREAS, the Company and the Holders (as defined below) are entering into this Agreement in accordance with the provisions in the Backstop
Agreement. 
 NOW, THEREFORE, IN CONSIDERATION of the mutual covenants contained in this Agreement, and for other good and valuable
consideration, the receipt and adequacy of which are hereby acknowledged, the Company and each of the Holders agree as follows: 
 1.
Definitions. As used in this Agreement, the following terms shall have the following meanings: 
 “Advice” has the
meaning set forth in Section 13(c). 
 “Affiliate” means, with respect to any person, any other
person which directly or indirectly controls, is controlled by, or is under common control with, such person. The term “control” (including the terms “controlled by” and “under common control with”) as used in this
definition means the possession, directly or indirectly (including through one or more intermediaries), of the power or authority to direct or cause the direction of management, whether through the ownership of voting securities, by contract or
otherwise. 
 “Agreement” has the meaning set forth in the Preamble. 

“Backstop Agreement” has the meaning set forth in the Preamble. 

“beneficially own” (and related terms such as “beneficial ownership” and “beneficial owner”) shall have
the meaning given to such term in Rule 13d-3 under the Exchange Act, and any Person’s beneficial ownership of securities shall be calculated in accordance with the provisions of such rule. 












 “Blackout Period” has the meaning set forth in
Section 5(a)(B). 
 “Board” means the Board of Directors of the Company or an authorized
committee thereof. 
 “Business Day” means any day, other than a Saturday or Sunday or a day on which commercial banks in
New York City are required by law to be closed. 
 “Commission” means the Securities and Exchange Commission. 

“Company” has the meaning set forth in the Preamble. 

“Counsel to the Holders” means the counsel selected by the Holders of a majority of the Registrable Securities. 

“Effective Date” means the date that a Registration Statement filed pursuant to this Agreement is first declared effective by
the Commission. 
 “Exchange Act” means the Securities Exchange Act of 1934, as amended, and the rules and regulations
promulgated thereunder. 
 “Form S-1” means form S-1 under the Securities Act, or
any other form hereafter adopted by the Commission for the general registration of securities under the Securities Act. 
 “Form S-3” means form S-3 under the Securities Act, or any other form hereafter adopted by the Commission having substantially the same usage as Form S-3. 

“FINRA” has the meaning set forth in Section 7. 

“Holder” or “Holders” means a holder of Registrable Securities that (a) was a member of the Ad Hoc
Group (as defined in the Plan), an Affiliate thereof or a permitted assignee of any such member or Affiliate on January 22, 2021 or (b) beneficially owns at least one percent (1.00%) or more of the New Diamond Common Shares on an as-converted basis as of the date hereof; provided that it is a signatory as a Holder to this Agreement or is an additional party identified on the signature pages of any joinder executed substantially in the
form set forth in Exhibit A hereto and delivered pursuant to this Agreement. A Person shall cease to be a Holder hereunder at such time as it ceases to hold any Registrable Securities. 

“Indemnified Party” has the meaning set forth in Section 8(c). 

“Indemnifying Party” has the meaning set forth in Section 8(c). 

“Initial Shelf Expiration Date” has the meaning set forth in Section 2(d). 

“Initial Shelf Registration Statement” has the meaning set forth in Section 2(a). 

“Losses” has the meaning set forth in Section 8(a). 

“New Diamond Common Shares” means those certain shares of common stock or other membership units, partnership interests or
other equity interests issued by the Reorganized Diamond Offshore representing 100% of the equity interests in the Reorganized Diamond Offshore. 

  
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 “Person” means an individual or corporation, partnership, trust,
incorporated or unincorporated association, joint venture, limited liability company, joint stock company, government (or an agency or subdivision thereof) or other entity of any kind. 

“Proceeding” means an action, claim, suit, investigation or proceeding (including, without limitation, an investigation or
partial proceeding, such as a deposition), whether commenced or threatened. 
 “Prospectus” means the prospectus included
in a Registration Statement (including, without limitation, a prospectus that includes any information previously omitted from a prospectus filed as part of an effective registration statement in reliance upon Rule 430A promulgated under the
Securities Act), as amended or supplemented by any prospectus supplement, with respect to the terms of the offering of any portion of the Registrable Securities covered by a Registration Statement, and all other amendments and supplements to the
Prospectus, including post-effective amendments, and all material incorporated by reference or deemed to be incorporated by reference in such Prospectus. 

“Registrable Securities” means, collectively, (a) all of the New Diamond Common Shares held by a Holder and (b) any
additional New Diamond Common Shares paid, issued or distributed in respect of any such shares by way of a stock dividend, stock split or distribution, or in connection with a combination of shares, and any security into which such New Diamond
Common Shares shall have been converted or exchanged in connection with a recapitalization, reorganization, reclassification, merger, consolidation, exchange, distribution or otherwise; provided, however, that as to any Registrable
Securities, such securities shall cease to constitute Registrable Securities upon the earliest to occur of: (i) the date on which such securities are disposed of pursuant to an effective Registration Statement; (ii) the date on which such
securities are disposed of pursuant to Rule 144; (iii) the date on which such securities can be sold pursuant to Rule 144 without volume or manner of sale restrictions; (iv) such Registrable Securities are otherwise transferred and new
certificates for them not bearing a legend restricting further transfer under the Securities Act are delivered by the Company; and (v) the date on which such Registrable Securities cease to be outstanding. 

“Registration Expiration Date” has the meaning set forth in Section 3(a). 

“Registration Statement” means any one or more registration statements of the Company filed under the Securities Act that
covers the resale of any of the Registrable Securities pursuant to the provisions of this Agreement (including without limitation any Shelf Registration Statement), amendments and supplements to such registration statements, including post-effective
amendments, all exhibits and all material incorporated by reference or deemed to be incorporated by reference in such registration statements. 

“Related Fund” means, with respect to any Person, any fund, account or investment vehicle that is controlled or managed by
such Person, by any Affiliate of such Person, or, if applicable, such Person’s investment manager. 

  
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 “Reorganized Diamond Offshore” has the meaning set forth in the Backstop
Agreement. 
 “Requested Securities” has the meaning set forth in Section 3(a). 

“Requesting Group” has the meaning set forth in Section 2(a). 

“Rule 144” means Rule 144 promulgated by the Commission pursuant to the Securities Act, as such Rule may be amended from time
to time, or any similar rule or regulation hereafter adopted by the Commission having substantially the same effect as such Rule. 

“Rule 158” means Rule 158 promulgated by the Commission pursuant to the Securities Act, as such Rule may be amended from time
to time, or any similar rule or regulation hereafter adopted by the Commission having substantially the same effect as such Rule. 

“Rule 415” means Rule 415 promulgated by the Commission pursuant to the Securities Act, as such Rule may be amended from time
to time, or any similar rule or regulation hereafter adopted by the Commission having substantially the same effect as such Rule. 

“Rule 424” means Rule 424 promulgated by the Commission pursuant to the Securities Act, as such Rule may be amended from time
to time, or any similar rule or regulation hereafter adopted by the Commission having substantially the same effect as such Rule. 

“Securities Act” means the Securities Act of 1933, as amended, and the rules and regulations promulgated thereunder. 

“Selling Stockholder Questionnaire” means a questionnaire reasonably adopted by the Company from time to time, initially
substantially in the form set forth in Exhibit B hereto. 
 “Settlement Date” means April 23, 2021. 

“Shelf Registration Statement” means a Registration Statement filed by the Company with the Commission pursuant to this
Agreement and in accordance with the Securities Act for the offer and resale of Registrable Securities by Holders on a continuous or delayed basis pursuant to Rule 415. 

“Smaller Reporting Company” means a “smaller reporting company” as defined in Item 10(f) of Regulation S-K, as such definition may be amended from time to time. 
 “Transfer” has the meaning
set forth in Section 10. 
 2. Initial Shelf Registration. 

(a) The Company shall prepare a Shelf Registration Statement (as may be amended from time to time, the “Initial Shelf
Registration Statement”), which shall contain the “Plan of Distribution” section substantially in the form set forth in Exhibit C hereto, and shall include in the Initial Shelf Registration Statement the Registrable
Securities of each Holder who shall request inclusion therein of some or all of their Registrable Securities by checking the appropriate box on the signature page of such Holder hereto or by written notice to the Company


  
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prior to the filing of such Initial Shelf Registration Statement (provided, however, that each such Holder has returned to the Company a fully completed and signed Selling
Stockholder Questionnaire and responses to any requests for further information in accordance with Section 6 hereof and has otherwise timely complied with the requirements of this Agreement with respect to the inclusion of
its Registrable Securities in the Initial Shelf Registration Statement) (together, the “Requesting Group”). The Company shall file the Initial Shelf Registration Statement with the Commission on or prior to the 60th day following the Settlement Date; provided, however, that the Company shall not be required to file or cause to be declared effective the Initial Shelf Registration Statement unless the
Requesting Group (i) includes at least one member of the Ad Hoc Group or (ii) Holders that beneficially own at least one percent (1.00%) or more of the New Diamond Common Shares on an as-converted
basis as of the date hereof; and provided further that, solely with respect to Holders constituting a Requesting Group pursuant to the preceding clause (ii), the Company shall not be required to file an Initial Shelf Registration Statement
until 180 days following the Settlement Date. 
 (b) The Company shall include in the Initial Shelf Registration Statement all Registrable
Securities whose inclusion has been requested in accordance with this Agreement; provided, however, that the Company shall not be required to include an amount of Registrable Securities in excess of the amount as may be permitted to be
included in such Registration Statement under the rules and regulations of the Commission and the applicable interpretations thereof by the staff of the Commission. In the event that the Company is unable to include all Registrable Securities whose
inclusion has been requested in accordance with this Agreement based on the limitation provided in the previous sentence, then the amount of such Registrable Securities that may be included in such Initial Shelf Registration Statement shall be
allocated pro rata among all Holders in proportion to the number of shares of Registrable Securities such Holders have requested to include in the Initial Shelf Registration Statement. 

(c) The Initial Shelf Registration Statement shall be filed on Form S-3 if the Company is eligible to
use such form. 
 (d) Subject to the Company’s rights under Section 5, the Company shall use its commercially
reasonably efforts to cause the Initial Shelf Registration Statement to be declared effective by the Commission as promptly as practicable, and shall, subject to Section 3 hereof, use its commercially reasonable efforts to
keep such Shelf Registration Statement continuously effective, and not subject to any stop order, injunction or other similar order or requirement of the Commission, until the earlier of (i) if the Initial Shelf Registration Statement was filed
on Form S-1, the date the Company (A) is eligible to register the Registrable Securities for resale by Holders on Form S-3 or is a Smaller Reporting Company
eligible to incorporate by reference pursuant to Item 12(b) of Form S-1 and (B) has filed such Registration Statement with the Commission and such Registration Statement is effective and (ii) the
date that all Registrable Securities covered by the Initial Shelf Registration Statement shall cease to be Registrable Securities (such earlier date, the “Initial Shelf Expiration Date”). 

(e) If the Initial Shelf Registration Statement is on Form S-1, then for so long as any Registrable
Securities covered by the Initial Shelf Registration Statement constitute Registrable Securities, the Company will file any supplements to the Prospectus or post-effective amendments required to be filed by applicable law in order to incorporate
into such Prospectus 

  
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any Current Reports on Form 8-K necessary or required to be filed by applicable law, any Quarterly Reports on Form
10-Q or any Annual Reports on Form 10-K filed by the Company with the Commission, or any other information necessary so that: (i) the Initial Shelf Registration
Statement shall not include any untrue statement of material fact or omit to state any material fact necessary in order to make the statements therein not misleading and (ii) the Company complies with its obligations under Item 512(a)(1) of
Regulation S-K; provided, however, that these obligations remain subject to the Company’s rights under Section 5 and the Holders’ obligations under
Section 4 and Section 11. 
 3. Subsequent Registration Statements 

(a) Until the earlier of (i) three years following the Effective Date of the Initial Shelf Registration Statement and (ii) for so
long as any Registrable Securities requested by the Requesting Group to be included in the Initial Shelf Registration Statement (the “Requested Securities”) constitute Registrable Securities (the “Registration Expiration
Date”), the Company shall use its commercially reasonably efforts to (A) maintain its eligibility to register the Requested Securities on Form S-3 and (B) if the Company is unable to
maintain its eligibility to register the Requested Securities on Form S-3, maintain its ability to meet the eligibility requirements to register the Requested Securities on Form
S-1. 
 (b) After the Initial Shelf Expiration Date and until the Registration Expiration Date, if
there is not an effective Registration Statement which includes the Requested Securities that is currently outstanding, the Company shall: (i) if the Company is eligible to register the Requested Securities on Form S-3, promptly file a Shelf Registration Statement on Form S-3 and use its commercially reasonable efforts to cause such Registration Statement to be declared effective,
(ii) if the Company is not eligible to register the Requested Securities on Form S-3, if the Company is a Smaller Reporting Company eligible to incorporate by reference pursuant to Item 12(b) of Form S-1, promptly file a Registration Statement on Form S-1 and use its commercially reasonable efforts to cause such Registration Statement to be declared effective or
(iii) if the Company is not a Smaller Reporting Company eligible to incorporate by reference pursuant to Item 12(b) of Form S-1, promptly file a Registration Statement on Form S-1 and use its commercially reasonable efforts to cause such Registration Statement to be declared effective and for so long as any of the Requested Securities covered by such Registration Statement on Form S-1 constitute Registrable Securities, file any supplements to the Registration Statement or post-effective amendments required to be filed by applicable law in order to incorporate into such Registration Statement
any Current Reports on Form 8-K necessary or required to be filed by applicable law, any Quarterly Reports on Form 10-Q or any Annual Reports on Form 10-K filed by the Company with the Commission, or any other information necessary so that (x) such Registration Statement shall not include any untrue statement of material fact or omit to state any material
fact necessary in order to make the statements therein not misleading, and (y) the Company complies with its obligations under Item 512(a)(1) of Regulation S-K; provided, however, that these
obligations remain subject to the Company’s rights under Section 5 and the Holders’ obligations under Section 4 and Section 11. 

  
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 4. Holders’ Obligations. No Holder shall be entitled to sell any
Registrable Securities pursuant to this Agreement, unless such Holder has timely furnished the Company with all information required to be disclosed in order to make the information previously furnished to the Company by such Holder not misleading
and any other information regarding such Holder and the distribution of its Registrable Securities as the Company may from time to time reasonably request. Any sale of any Registrable Securities by any Holder shall constitute a representation and
warranty by such Holder that the information of such Holder furnished in writing by or on behalf of such Holder, including in such Holder’s Selling Stockholder Questionnaire, to the Company does not include an untrue statement of a material
fact or omit to state a material fact necessary in order to make the statements furnished by such Holder, in the light of the circumstances under which they were made, not misleading. 

5. Blackout Periods. 

(a) Notwithstanding anything to the contrary herein— 

(A) the Company shall be entitled to postpone the filing or effectiveness of, or, at any time after a Registration Statement
has been declared effective by the Commission suspend the use of, a Registration Statement (including the Prospectus included therein) if in the good faith judgment of the Board, such registration, offering or use would reasonably be expected to
materially affect in an adverse manner or materially interfere with any bona fide material financing of the Company or any material transaction under consideration by the Company or would require the disclosure of information that has not been, and
is not otherwise required to be, disclosed to the public and the premature disclosure of which would reasonably be expected, in the good faith judgment of the Board, to materially affect the Company in an adverse manner; and 

(B) at any time after a Registration Statement has been declared effective by the Commission and there is no duty to disclose
under applicable law, the Company may delay the disclosure of material non-public information concerning the Company if the disclosure of such information at the time would, in the good faith judgment of the
Board, reasonably be expected to materially and adversely affect the Company (the period of a postponement or suspension as described in clause (A) and/or a delay described in this clause (B), a “Blackout Period”). 

(b) The Company shall promptly (i) notify the Holders in writing of the existence of the event or material
non-public information giving rise to a Blackout Period (provided that the Company shall not disclose the content of such material non-public information to any
Holder, without the express consent of such Holder) or the need to file a post-effective amendment, as applicable, and the date on which such Blackout Period will begin, (ii) use commercially reasonable efforts to terminate a Blackout Period as
promptly as practicable and (iii) notify the Holders in writing of the date on which the Blackout Period ends. 
 (c) A Blackout Period
may not be called by the Company more than three (3) times in any period of twelve (12) consecutive months, and the duration of all Blackout Periods shall not exceed ninety (90) days in any period of twelve (12) consecutive
months. For purposes of determining the length of a Blackout Period, the Blackout Period shall be deemed to begin on and include the date the Holders receive the notice referred to in clause (i) of Section 5(b) and
shall end on and include the later of the date the Holders receive the notice referred to in clause (iii) of Section 5(b) and the date referred to in such notice. In the event the Company declares a Blackout Period,
the Registration Expiration Date shall be deemed to be extended by the number of days an effective Registration Statement is unavailable. 

  
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 6. Registration Procedures. If and when the Company is required to effect any
registration under the Securities Act as provided in Section 2(a) of this Agreement, the Company shall use its commercially reasonable efforts to: 

(a) prepare and file with the Commission the requisite Registration Statement to effect such registration and thereafter use
its commercially reasonable efforts to cause such Registration Statement to become and remain effective, subject to the limitations contained herein; 

(b) prepare and file with the Commission such amendments and supplements to such Registration Statement and the Prospectus used
in connection therewith as may be necessary to keep such Registration Statement effective and to comply with the provisions of the Securities Act and the Exchange Act with respect to the disposition of all Registrable Securities covered by such
Registration Statement until such time as all of such Registrable Securities have ceased to constitute Registrable Securities, subject to the limitations contained herein; provided that to the extent the Commission requires such Registration
Statement to include an offering price for the Registrable Securities, Holders whose securities are covered by the Registration Statement will provide the offering price, which shall be determined by Holders beneficially owning a majority of such
Registrable Securities, to the Company and the Company shall, as soon as possible and, in any event, within two Business Days, amend such Registration Statement through a prospectus supplement or otherwise to include such offering price; 

(c) (i) before filing a Registration Statement or Prospectus or any amendments or supplements thereto, at the Company’s
expense, furnish to the Holders whose securities are covered by the Registration Statement copies of all such documents, other than documents that are incorporated by reference into such Registration Statement or Prospectus, proposed to be filed and
such other documents reasonably requested by such Holders (which may be furnished by email), and afford Counsel to the Holders a reasonable opportunity to review and comment on such documents; and (ii) in connection with the preparation and
filing of each such Registration Statement pursuant to this Agreement, (A) upon reasonable advance notice to the Company, give each of the foregoing such reasonable access to all financial and other records, corporate documents and properties
of the Company as shall be necessary, in the reasonable opinion of Counsel to the Holders, to conduct a reasonable due diligence investigation for purposes of the Securities Act and Exchange Act and (B) upon reasonable advance notice to the
Company and during normal business hours and for reasonable periods, provide such reasonable opportunities to discuss the business of the Company with its officers, directors and the independent public accountants who have certified its financial
statements as shall be necessary, in the reasonable opinion of Counsel to the Holders, to conduct a reasonable due diligence investigation for purposes of the Securities Act and the Exchange Act; 

(d) notify selling Holders of Registrable Securities, promptly after the Company receives notice thereof, of the time when such
Registration Statement has been declared effective or a supplement to any Prospectus forming a part of such Registration Statement has been filed; 

  
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 (e) with respect to any offering of Registrable Securities, furnish to each
selling Holder of Registrable Securities, if any, without charge, copies of the applicable Registration Statement, each amendment and supplement thereto, the Prospectus included in such Registration Statement (including each preliminary
Prospectus, final Prospectus, and any other Prospectus (including any Prospectus filed under Rule 424, Rule 430A or Rule 430B promulgated under the Securities Act and any “issuer free writing prospectus” as such term is
defined under Rule 433 promulgated under the Securities Act), all exhibits and other documents filed therewith and such other documents as such seller may reasonably request including in order to facilitate the disposition of the Registrable
Securities owned by such seller, and upon request, a copy of any and all transmittal letters or other correspondence to or received from, the Commission or any other governmental authority relating to such offer (all of which documents mentioned in
this Section 6(e) may be furnished by email); 
 (f) (i) register or qualify all Registrable
Securities covered by such Registration Statement under such other securities or blue sky laws of such states or other jurisdictions of the United States of America as the Holders covered by such Registration Statement shall reasonably request in
writing, (ii) keep such registration or qualification in effect for so long as such Registration Statement remains in effect and (iii) take any other action that may be necessary or reasonably advisable to enable such Holders to consummate
the disposition in such jurisdictions of the Registrable Securities to be sold by such Holders, except that the Company shall not for any such purpose be required to qualify generally to do business as a foreign corporation in any jurisdiction
wherein it would not but for the requirements of this subsection (f) be obligated to be so qualified, to subject itself to taxation in such jurisdiction or to consent to general service of process in any such jurisdiction; 

(g) cause all Registrable Securities included in such Registration Statement to be registered with or approved by such other
federal or state governmental agencies or authorities as necessary upon the opinion of counsel to the Company or Counsel to the Holders of Registrable Securities included in such Registration Statement to enable such Holder or Holders thereof to
consummate the disposition of such Registrable Securities in accordance with their intended method of distribution thereof; 

(h) subject to the Holders’ obligations under Section 4, notify each Holder of Registrable
Securities included in such Registration Statement at any time when a Prospectus relating thereto is required to be delivered under the Securities Act, upon discovery that, or upon the happening of any event as a result of which, the Prospectus
included in such Registration Statement, as then in effect, includes an untrue statement of a material fact or omits to state any material fact required to be stated therein or necessary to make the statements therein not misleading in the light of
the circumstances under which they were made and for which the Company believes in its reasonable good faith judgment it must suspend the use of the Registration Statement until an amendment or supplement to such Registration Statement necessary to
keep such Registration Statement effective and 

  
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to comply with the provisions of the Securities Act and the Exchange Act may be filed (which the Company shall use its commercially reasonable efforts to file and have declared effective as soon
as possible), at the written request of any such Holder, promptly prepare and furnish to it a copy of a supplement to or an amendment (which may be furnished by email) of such Prospectus as may be necessary so that, as thereafter delivered to the
purchasers of such securities, such Prospectus, as supplemented or amended, shall not include an untrue statement of a material fact or omit to state a material fact required to be stated therein or necessary to make the statements therein not
misleading in the light of the circumstances under which they were made; 
 (i) notify the Holders of Registrable Securities
included in such Registration Statement promptly of any request by the Commission for the amending or supplementing of such Registration Statement or Prospectus or for additional information; 

(j) advise the Holders of Registrable Securities included in such Registration Statement promptly after the Company receives
notice or obtains knowledge of any order suspending the effectiveness of a registration statement relating to the Registrable Securities at the earliest practicable moment and promptly use its commercially reasonable efforts to obtain the withdrawal
of such order; 
 (k) otherwise comply with all applicable rules and regulations of the Commission and any other governmental
agency or authority having jurisdiction over the offering of Registrable Securities, and make available to its stockholders, as soon as reasonably practicable, an earnings statement covering the period of at least twelve (12) months, but not
more than eighteen (18) months, beginning with the first (1st) full calendar month after the Effective Date of such Registration Statement, which earnings statement shall satisfy the
provisions of Section 11(a) of the Securities Act and Rule 158 promulgated thereunder and which requirement will be deemed satisfied if the Company timely files complete and accurate information on Form
10-Q and 10-K and Current Reports on Form 8-K under the Exchange Act and otherwise complies with Rule 158 under the Securities
Act; 
 (l) provide and cause to be maintained a transfer agent and registrar for the Registrable Securities included in a
Registration Statement no later than the Effective Date thereof; 
 (m) enter into such agreements and take such other
actions as the Holders beneficially owning a majority of the Registrable Securities included in a Registration Statement shall reasonably request in order to expedite or facilitate the disposition of such Registrable Securities, including customary
indemnification; 
 (n) cooperate with the Holders of Registrable Securities included in a Registration Statement to
facilitate the timely preparation and delivery of certificates representing Registrable Securities to be sold and not bearing any restrictive legends, and enable such Registrable Securities to be in such share amounts and registered in such names as
the Holders beneficially owning a majority of the Registrable Securities being offered for sale, may reasonably request at least three (3) Business Days prior to any sale of Registrable Securities; and 

  
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 (o) otherwise use its commercially reasonable efforts to take all other
steps necessary to effect the registration of such Registrable Securities contemplated hereby. 
 In addition, at least ten (10) Business Days prior to
the first anticipated filing date of a Registration Statement for any registration under this Agreement, the Company will notify each Holder of the information the Company requires from that Holder, including any update to or confirmation of the
information contained in the Selling Stockholder Questionnaire, if any, which shall be fully completed and delivered to the Company promptly upon request and, in any event, within five (5) Business Days prior to the applicable anticipated
filing date. Each Holder further agrees that it shall not be entitled to be named as a selling stockholder in the Registration Statement or use the Prospectus for offers and resales of Registrable Securities at any time, unless such Holder has
returned to the Company a fully completed and signed Selling Stockholder Questionnaire and responses to any requests for further information as described in the previous sentence. If a Holder of Registrable Securities returns a Selling Stockholder
Questionnaire or a request for further information, in either case, after its respective deadline, the Company shall be permitted to exclude such Holder from being a selling stockholder in the Registration Statement or any pre-effective or post-effective amendment thereto. Each Holder acknowledges and agrees that the information in the Selling Stockholder Questionnaire or request for further information as described in this
Section 6 will be used by the Company in the preparation of the Registration Statement and hereby consents to the inclusion of such information in the Registration Statement. 

7. Registration Expenses. All fees and expenses incident to the Company’s performance of or compliance with its obligations under
this Agreement shall be borne by the Company whether or not any Registrable Securities are sold pursuant to a Registration Statement. The fees and expenses referred to in the foregoing sentence shall include, without limitation, (i) all
registration and filing fees (including, without limitation, fees and expenses (A) with respect to filings required to be made with any trading market on which the New Diamond Common Shares are then listed for trading, (B) with respect to
compliance with applicable state securities or Blue Sky laws (including, without limitation, reasonable fees and disbursements of counsel for the Company in connection with Blue Sky qualifications or exemptions of the Registrable Securities and
determination of the eligibility of the Registrable Securities for investment under the laws of such jurisdictions as requested by the Holders) and (C) with respect to any filing that may be required to be made by any broker through which a
Holder intends to make sales of Registrable Securities with the Financial Industry Regulatory Authority (“FINRA”) pursuant to the FINRA Rule 5110, so long as the broker is receiving no more than a customary brokerage commission in
connection with such sale, (ii) printing expenses (including, without limitation, expenses of printing certificates for Registrable Securities), (iii) messenger, telephone and delivery expenses, (iv) fees and disbursements of counsel for
the Company, (v) Securities Act liability insurance, if the Company so desires such insurance, and (vi) fees and expenses of all other Persons retained by the Company in connection with the consummation of the transactions contemplated by
this Agreement. In addition, the Company will pay the reasonable fees and disbursements of one (1) Counsel to the Holders, including, for the avoidance of doubt, any
out-of-pocket expenses of Counsel to the Holders in connection with the filing or amendment of any Registration Statement, Prospectus or free writing prospectus
hereunder. Notwithstanding the foregoing, each Holder shall pay all discounts and commissions and transfer taxes, if any, relating to the resale or disposition of such Holder’s Registrable Securities pursuant to a Registration Statement. 

  
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 8. Indemnification. 

(a) Indemnification by the Company. The Company shall, notwithstanding any termination of this Agreement, indemnify, defend and hold
harmless each Holder, the officers, directors, agents, partners, members, investment manager, managers, stockholders, Affiliates and employees of each of them, each Person who controls any such Holder (within the meaning of Section 15 of the
Securities Act or Section 20 of the Exchange Act) and the officers, directors, partners, members, managers, stockholders, agents and employees of each such controlling Person, to the fullest extent permitted by applicable law, from and against
any and all losses, claims, damages, liabilities, costs (including, without limitation, reasonable costs of preparation and investigation and reasonable attorneys’ fees) and expenses (collectively, “Losses”), to which any of
them may become subject, that arise out of or are based upon (i) any untrue or alleged untrue statement of a material fact contained in any Registration Statement, any Prospectus or any form of Prospectus or in any amendment or supplement
thereto or in any preliminary Prospectus or (ii) any omission or alleged omission to state a material fact required to be stated therein or necessary to make the statements therein (in the case of any Prospectus or form of Prospectus or
supplement thereto, in the light of the circumstances under which they were made) not misleading, except to the extent, but only to the extent, that (A) such untrue statements, alleged untrue statements, omissions or alleged omissions are based
upon information regarding such Holder furnished in writing (including, without limitation, in a Selling Stockholder Questionnaire furnished by such Holder) to the Company by such Holder expressly for use therein, or to the extent that such
information relates to such Holder or such Holder’s proposed method of distribution of Registrable Securities and was provided by such Holder in writing expressly for use in the Registration Statement, such Prospectus or such form of Prospectus
or in any amendment or supplement thereto, or (B) in the case of an occurrence of an event of the type specified in Section 6(h), related to the use by a Holder of an outdated or defective Prospectus after the Company
has notified such Holder in writing that the Prospectus is outdated or defective and prior to the receipt by such Holder of the Advice contemplated and defined in Section 13(c) below, but only if and to the extent that
following the receipt of the Advice the misstatement or omission giving rise to such Loss would have been corrected, and provided, further that such indemnity shall not be available to any person to the extent that such Losses resulted
from or are caused by willful misconduct or gross negligence of such person. Such indemnity shall remain in full force and effect regardless of any investigation made by or on behalf of an Indemnified Party (as defined in
Section 8(c)), shall survive the transfer of the Registrable Securities by the Holders, and shall be in addition to any liability which the Company may otherwise have. 

(b) Indemnification by Holders. Each Holder shall, severally and not jointly, indemnify and hold harmless the Company, its respective
directors, officers, agents and employees, each Person who controls the Company (within the meaning of Section 15 of the Securities Act and Section 20 of the Exchange Act), and the directors, officers, agents or employees of such
controlling Persons, to the fullest extent permitted by applicable law, from and against all Losses, as incurred, arising out of or are based upon any untrue or alleged untrue statement of a material fact contained in any Registration Statement, any
Prospectus, or any form of Prospectus, or in any amendment or supplement thereto or in any preliminary Prospectus, or 

  
 12 













 
arising out of or relating to any omission or alleged omission of a material fact required to be stated therein or necessary to make the statements therein (in the case of any Prospectus, or any
form of Prospectus or supplement thereto, in the light of the circumstances under which they were made) not misleading (i) to the extent, but only to the extent, that such untrue statements or omissions are based upon information regarding such
Holder furnished in writing (including, without limitation, in a Selling Stockholder Questionnaire furnished by such Holder) to the Company by such Holder expressly for use therein, (ii) to the extent, but only to the extent, that such
information relates to such Holder or such Holder’s proposed method of distribution of Registrable Securities and was provided by such Holder in writing (including, without limitation, in a Selling Stockholder Questionnaire furnished by such
Holder) expressly for use in a Registration Statement, such Prospectus or such form of Prospectus or in any amendment or supplement thereto or (iii) in the case of an occurrence of an event of the type specified in
Section 6(h), to the extent, but only to the extent, related to the use by such Holder of an outdated or defective Prospectus after the Company has notified such Holder in writing that the Prospectus is outdated or
defective and prior to the receipt by such Holder of the Advice contemplated in Section 13(c), but only if and to the extent that following the receipt of the Advice the misstatement or omission giving rise to such Loss
would have been corrected. In no event shall the liability of any selling Holder hereunder be greater in amount than the dollar amount of the net proceeds received by such Holder upon the sale of the Registrable Securities giving rise to such
indemnification obligation. Such indemnity shall remain in full force and effect regardless of any investigation made by or on behalf of an Indemnified Party (as defined in Section 8(c)), shall survive the transfer of the
Registrable Securities by the Holders, and shall be in addition to any liability which the Holder may otherwise have. 
 (c) Conduct of
Indemnification Proceedings. If any Proceeding shall be brought or asserted against any Person entitled to indemnity hereunder (an “Indemnified Party”), such Indemnified Party shall promptly notify the Person from whom indemnity
is sought (the “Indemnifying Party”) in writing, and the Indemnifying Party shall have the right to assume the defense thereof, including the employment of counsel reasonably satisfactory to the Indemnified Party and the payment of
all reasonable fees and expenses incurred in connection with defense thereof; provided, that the failure of any Indemnified Party to give such notice shall not relieve the Indemnifying Party of its obligations or liabilities pursuant to this
Agreement, except (and only) to the extent that such failure shall have materially and adversely prejudiced the Indemnifying Party. 
 An
Indemnified Party shall have the right to employ separate counsel in any such Proceeding and to participate in the defense thereof, but the fees and expenses of such counsel shall be at the expense of such Indemnified Party or Parties unless:
(1) the Indemnifying Party has agreed in writing to pay such fees and expenses; (2) the Indemnifying Party shall have failed promptly to assume the defense of such Proceeding and to employ counsel reasonably satisfactory to such
Indemnified Party in any such Proceeding; or (3) the named parties to any such Proceeding (including any impleaded parties) include both such Indemnified Party and the Indemnifying Party, and such Indemnified Party shall have been advised by
counsel that in the reasonable judgment of such counsel a conflict of interest exists if the same counsel were to represent such Indemnified Party and the Indemnifying Party; provided, that the Indemnifying Party shall not be liable for the
reasonable and documented fees and expenses of more than one separate firm of attorneys at any time for all Indemnified Parties. The Indemnifying Party shall not be liable for any settlement of 

  
 13 













 
any such Proceeding effected without its written consent, which consent shall not be unreasonably withheld, delayed or conditioned. No Indemnifying Party shall, without the prior written consent
of the Indemnified Party, effect any settlement of any pending Proceeding in respect of which any Indemnified Party is a party, unless such settlement includes an unconditional release of such Indemnified Party from all liability on claims that are
the subject matter of such Proceeding. 
 Subject to the terms of this Agreement, all reasonable and documented fees and expenses of the
Indemnified Party (including reasonable and documented fees and expenses to the extent incurred in connection with investigating or preparing to defend such Proceeding in a manner not inconsistent with this Section 8(c))
shall be paid to the Indemnified Party, as incurred, with reasonable promptness after receipt of written notice thereof to the Indemnifying Party; provided, that the Indemnified Party shall promptly reimburse the Indemnifying Party for that
portion of such fees and expenses applicable to such actions for which such Indemnified Party is finally judicially determined to not be entitled to indemnification hereunder. The failure to deliver written notice to the Indemnifying Party within a
reasonable time of the commencement of any such action shall not relieve such Indemnifying Party of any liability to the Indemnified Party under this Section 8, except to the extent that the Indemnifying Party is materially
and adversely prejudiced in its ability to defend such action. 
 (d) Contribution. If a claim for indemnification under
Section 8(a) or (b) is unavailable to an Indemnified Party or insufficient to hold an Indemnified Party harmless for any Losses, then each Indemnifying Party, in lieu of indemnifying such Indemnified Party,
shall contribute to the amount paid or payable by such Indemnified Party as a result of such Losses, in such proportion as is appropriate to reflect the relative fault of the Indemnifying Party and Indemnified Party in connection with the actions,
statements or omissions that resulted in such Losses as well as any other relevant equitable considerations. The relative fault of such Indemnifying Party and Indemnified Party shall be determined by reference to, among other things, whether any
action in question, including any untrue or alleged untrue statement of a material fact or omission or alleged omission of a material fact, has been taken or made by, or relates to information supplied by, such Indemnifying Party or Indemnified
Party, and the parties’ relative intent, knowledge, access to information and opportunity to correct or prevent such action, statement or omission. 

The parties hereto agree that it would not be just and equitable if contribution pursuant to this Section 8(d) were
determined by pro rata allocation or by any other method of allocation that does not take into account the equitable considerations referred to in the immediately preceding paragraph. Notwithstanding the provisions of this
Section 8(d), no Holder shall be required to contribute, in the aggregate, any amount in excess of the amount by which the net proceeds actually received by such Holder from the sale of the Registrable Securities subject to
the Proceeding exceeds the amount of any damages that such Holder has otherwise been required to pay by reason of such untrue or alleged untrue statement or omission or alleged omission. No person guilty of fraudulent misrepresentation (within the
meaning of Section 11(f) of the Securities Act) shall be entitled to contribution from any Person who was not guilty of such fraudulent misrepresentation. 

  
 14 













 9. Rule 144. With a view to making available to the Holders of
Registrable Securities the benefits of Rule 144 promulgated under the Securities Act and other rules and regulations of the Commission that may at any time permit a Holder of Registrable Securities to sell securities of the Company without
registration, until such time as when no Registrable Securities remain outstanding, the Company covenants that it will (i) if it is subject to the reporting requirement of 13 or 15(d) of the Exchange act, file in a timely manner all reports and
other documents required, if any, to be filed by it under the Securities Act and the Exchange Act and the rules and regulations adopted thereunder or (ii) if it is not subject to the reporting requirement of 13 or 15(d) of the Exchange Act,
make available information necessary to comply with Rule 144, if available with respect to resales of the Registrable Securities under the Securities Act, at all times, all to the extent required from time to time to enable such Holder to sell
Registrable Securities without registration under the Securities Act within the limitation of the exemption provided by (x) Rule 144 (if available with respect to resales of the Registrable Securities), as such rule may be amended from
time to time or (y) any similar rules or regulations adopted by the Commission. Upon the reasonable request of any Holder of Registrable Securities, the Company will deliver to such Holder a written statement as to whether it has complied with
such information requirements, and, if not, the specific reasons for non-compliance. 
 10.
Transfer of Registration Rights. Any Holder may freely assign its rights hereunder on a pro rata basis in connection with any sale, transfer, assignment, or other conveyance (any of the foregoing, a “Transfer”) of Registrable
Securities to any transferee or assignee; provided that all of the following additional conditions are satisfied: (a) such Transfer is effected in accordance with applicable securities laws; (b) such transferee or assignee agrees in
writing to become subject to the terms of this Agreement; and (c) the Company is given written notice by such Holder of such Transfer, stating the name and address of the transferee or assignee and identifying the Registrable Securities with
respect to which such rights are being transferred or assigned; and further provided, that (i) any rights assigned hereunder shall apply only in respect of the Registrable Securities that are Transferred and not in respect of any other
securities that the transferee or assignee may hold and (ii) any Registrable Securities that are Transferred may cease to constitute Registrable Securities following such Transfer in accordance with the terms of this Agreement. 

11. Cooperation. It shall be a condition of each Holder’s rights under Section 2 and
Section 3 that such Holder cooperate with the Company by entering into any undertakings and taking such other action relating to the conduct of the proposed offering which the Company or the underwriters may reasonably
request as being necessary to insure compliance with federal and state securities laws and the rules or other requirements of FINRA or which are otherwise customary and which the Company or the underwriters may reasonably request to effectuate the
offering. 
 12. Further Assurances. Each of the parties hereto shall execute all such further instruments and documents and take all
such further action as any other party hereto may reasonably require in order to effectuate the terms and purposes of this Agreement. 
 13.
Miscellaneous. 
 (a) Remedies. Any Person having rights under any provision of this Agreement shall be entitled to enforce
such rights specifically to recover damages caused by reason of any breach of any provision of this Agreement and to exercise all other rights granted by law. The parties hereto agree and acknowledge that money damages may not be an adequate remedy
for any breach 

  
 15 













 
of the provisions of this Agreement and that any party may in its sole discretion apply to any court of law or equity of competent jurisdiction (without posting any bond or other security) for
specific performance and for other injunctive relief in order to enforce or prevent violation of the provisions of this Agreement. 
 (b)
Compliance. Each Holder covenants and agrees that it will comply with the prospectus delivery requirements of the Securities Act as applicable to it (unless an exemption therefrom is available) in connection with sales of Registrable
Securities pursuant to any Registration Statement and shall sell the Registrable Securities only in accordance with a method of distribution described in each Registration Statement. 

(c) Discontinued Disposition. Each Holder agrees that, upon receipt of a notice from the Company of the occurrence of a Blackout
Period, such Holder will forthwith discontinue disposition of such Registrable Securities under a Registration Statement until it is advised in writing (the “Advice”) by the Company that the use of the applicable Prospectus (as it
may have been supplemented or amended) may be resumed. The Company may provide appropriate stop orders to enforce the provisions of this paragraph. 

(d) Preservation of Rights. The Company shall not grant to third parties any registration rights of the same nature as the registration
rights granted hereunder on terms which are more favorable than or inconsistent with the terms of the rights granted hereunder unless any such more favorable terms are concurrently added to the rights granted hereunder. 

(e) No Inconsistent Agreements. The Company shall not hereafter enter into any agreement with respect to its securities which is
inconsistent with or violates the rights granted to the Holders in this Agreement. 
 (f) Amendments and Waivers. The provisions of
this Agreement, including the provisions of this sentence, may not be amended, modified or supplemented, or waived unless the same shall be in writing and signed by the Company and Holders holding at least a majority of the then outstanding
Registrable Securities; provided, however, that any party may give a waiver as to itself and that any Person may become a party to this Agreement by executing and delivering a joinder in accordance with this Agreement; provided further,
however that no amendment, modification, supplement, or waiver that disproportionately and adversely affects, alters, or changes the interests of any Holder shall be effective against such Holder without the prior written consent of such Holder;
provided further, however that the definition of “Holders” in Section 1 may not be amended, modified or supplemented, or waived unless in writing and signed by all the signatories to this Agreement; and
provided further that the waiver of any provision with respect to any Registration Statement or offering may be given by Holders holding at least a majority of the then outstanding Registrable Securities entitled to participate in such
offering or, if such offering shall have been commenced, having elected to participate in such offering. Notwithstanding the foregoing, a waiver or consent to depart from the provisions hereof with respect to a matter that relates exclusively to the
rights of certain Holders and that does not directly or indirectly affect the rights of other Holders may be given by Holders of a majority of the Registrable Securities to which such waiver or consent relates; provided, however, that
the provisions of this sentence may not be amended, modified, or supplemented except in accordance with the provisions of the immediately preceding sentence. No waiver of any terms or conditions 

  
 16 













 
of this Agreement shall operate as a waiver of any other breach of such terms and conditions or any other term or condition, nor shall any failure to enforce any provision hereof operate as a
waiver of such provision or of any other provision hereof. No written waiver hereunder, unless it by its own terms explicitly provides to the contrary, shall be construed to effect a continuing waiver of the provisions being waived and no such
waiver in any instance shall constitute a waiver in any other instance or for any other purpose or impair the right of the party against whom such waiver is claimed in all other instances or for all other purposes to require full compliance with
such provision. The failure of any party to enforce any provision of this Agreement shall not be construed as a waiver of such provision and shall not affect the right of such party thereafter to enforce each provision of this Agreement in
accordance with its terms. 
 (g) Notices. Any notice or other communication required or which may be given hereunder shall be in
writing and shall be sent by certified or regular mail, by private national courier service (return receipt requested, postage prepaid), by personal delivery, by electronic mail or by facsimile transmission. Such notice or communication shall be
deemed given (i) if mailed, two days after the date of mailing, (ii) if sent by national courier service, one Business Day after being sent, (iii) if delivered personally, when so delivered, (iv) if sent by electronic mail, on
the Business Day such electronic mail is transmitted, or (v) if sent by facsimile transmission, on the Business Day such facsimile is transmitted, in each case as follows: 

(A) If to the Company: 

Diamond Offshore Drilling, Inc. 

15415 Katy Freeway, Suite 100 

Houston, Texas 77094 
 Attn:
David L. Roland, Senior Vice President, General Counsel and Secretary 
 Email: droland@dodi.com 

(B) If to the Holders (or to any of them), at their addresses as they appear in the records of the Company or the records of
the transfer agent or registrar, if any, for the New Diamond Common Shares. 
 If any time period for giving notice or taking action
hereunder expires on a day which is a Saturday, Sunday or legal holiday in the State of New York or the jurisdiction in which the Company’s principal office is located, the time period shall automatically be extended to the Business Day
immediately following such Saturday, Sunday or legal holiday. 
 (h) Successors and Assigns. This Agreement shall be binding upon and
inure to the benefit of and be enforceable by the parties hereto and their respective successors and assigns (including any trustee in bankruptcy). In addition, and whether or not any express assignment shall have been made, the provisions of this
Agreement which are for the benefit of the Holders of Registrable Securities (or any portion thereof) as such shall be for the benefit of and enforceable by any subsequent holder of any Registrable Securities (or of such portion thereof);
provided, that such subsequent holder of Registrable Securities shall be required to execute a joinder to this Agreement in form and substance reasonably satisfactory to the Company agreeing to be bound by its terms. No assignment or
delegation of this Agreement by the Company, or any of the Company’s rights, interests or obligations hereunder, shall be effective against any Holder without the prior written consent of such Holder. 

  
 17 













 (i) Execution and Counterparts. This Agreement may be executed simultaneously in one
or more counterparts, each of which shall constitute an original and all of which together shall constitute one and the same Agreement. 

(j) Delivery by Facsimile. Counterparts of this Agreement, and any documents delivered pursuant hereto or in connection herewith, may
be delivered via facsimile, electronic mail (including any electronic signature covered by the U.S. federal ESIGN Act of 2000, Uniform Electronic Transactions Act, the New York Electronic Signatures and Records Act or other applicable law, e.g.,
www.docusign.com) or other transmission method. Any counterpart so delivered shall be deemed to have been duly and validly delivered and be valid and effective for all purposes. 

(k) Governing Law; Venue. This Agreement and the rights and obligations of the parties hereunder shall be construed and enforced in
accordance with, and the rights of the parties shall be governed by, the laws of the State of New York, without giving effect to any conflict of laws principles that would require the application of the laws of any other jurisdiction. Each of the
parties hereunder irrevocably agrees that any legal action, suit or proceeding arising out of or relating to this Agreement brought by any party hereunder shall be brought and determined in any state court located in The City and County of New York,
and each of the parties hereunder hereby irrevocably submits to the exclusive jurisdiction of the aforesaid court for itself and with respect to its property, generally and unconditionally, with regard to any such proceeding arising out of or
relating to this Agreement. Each of the parties agrees not to commence any proceeding relating to this Agreement except in any state court located in The City and County of New York, other than proceedings in any court of competent jurisdiction to
enforce any judgment, decree or award rendered by the aforesaid court. Each of the parties further agrees that notice as provided in Section 13(g) shall constitute sufficient service of process and the parties further waive
any argument that such service is insufficient. The parties hereto consent to and agree to submit to the jurisdiction of any of the courts specified herein and agree to accept service of process to vest personal jurisdiction over them in any of
these courts. 
 (l) Waiver of Jury Trial. EACH PARTY TO THIS AGREEMENT HEREBY WAIVES, TO THE FULLEST EXTENT PERMITTED BY APPLICABLE
LAW, ANY RIGHT IT MAY HAVE TO A TRIAL BY JURY IN ANY LEGAL PROCEEDING DIRECTLY OR INDIRECTLY ARISING OUT OF OR RELATING TO THIS AGREEMENT (WHETHER BASED ON CONTRACT, TORT OR ANY OTHER THEORY). EACH PARTY (I) CERTIFIES THAT NO REPRESENTATIVE,
AGENT OR ATTORNEY OF ANY OTHER PARTY HAS REPRESENTED, EXPRESSLY OR OTHERWISE, THAT SUCH OTHER PARTY WOULD NOT, IN THE EVENT OF LITIGATION, SEEK TO ENFORCE THE FOREGOING WAIVER AND (II) ACKNOWLEDGES THAT IT AND THE OTHER PARTIES HAVE BEEN
INDUCED TO ENTER INTO THIS AGREEMENT BY, AMONG OTHER THINGS, THE MUTUAL WAIVERS AND CERTIFICATIONS IN THIS SECTION 13(l). 

  
 18 













 (m) Severability. If any provision of this Agreement, or the application of any such
provision to any person or circumstance, shall be held invalid or unenforceable in whole or in part, such invalidity or unenforceability shall attach only to such provision or circumstance thereof and any remaining part of such provision hereof, and
this Agreement, shall continue in full force and effect to the furthest extent permitted by applicable law. Upon any such determination of invalidity, the parties hereunder shall negotiate in good faith to modify this Agreement so as to effect the
original intent of the parties as closely as possible. 
 (n) Descriptive Headings; Interpretation; No Strict Construction. The
descriptive headings of this Agreement are inserted for convenience only and do not constitute a substantive part of this Agreement. Whenever required by the context, any pronoun used in this Agreement shall include the corresponding masculine,
feminine or neuter forms, and the singular forms of nouns, pronouns, and verbs shall include the plural and vice versa. Reference to any agreement, document, or instrument means such agreement, document, or instrument as amended or otherwise
modified from time to time in accordance with the terms thereof, and, if applicable, hereof. The words “include”, “includes” or “including” in this Agreement shall be deemed to be followed by “without
limitation”. The use of the words “or,” “either” or “any” shall not be exclusive. The parties hereto have participated jointly in the negotiation and drafting of this Agreement. If an ambiguity or question of
intent or interpretation arises, this Agreement shall be construed as if drafted jointly by the parties hereto, and no presumption or burden of proof shall arise favoring or disfavoring any party by virtue of the authorship of any of the provisions
of this Agreement. All references to laws, rules, regulations and forms in this Agreement shall be deemed to be references to such laws, rules, regulations and forms, as amended from time to time or, to the extent replaced, the comparable successor
thereto in effect at the time. All references to agencies, self-regulatory organizations or governmental entities in this Agreement shall be deemed to be references to the comparable successors thereto from time to time. 

(o) Entire Agreement. This Agreement and any certificates, documents, instruments and writings that are delivered pursuant hereto,
constitutes the entire agreement and understanding of the parties in respect of the subject matter hereof and supersedes all prior understandings, agreements or representations by or among the parties, written or oral, to the extent they relate in
any way to the subject matter hereof. 
 (p) Termination. The obligations of the Company and of any Holder, other than those
obligations contained in Section 8 and this Section 13, shall terminate with respect to the Company and such Holder as soon as such Holder no longer beneficially owns any Registrable Securities.

 [REMAINDER OF PAGE INTENTIONALLY LEFT BLANK] 

  
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 IN WITNESS WHEREOF, the parties have executed this Registration Rights Agreement as of the
date first written above. 
  

			
	DIAMOND OFFSHORE DRILLING, INC.


 
			
		
	By:	 	 


 
			
	Name:	 	
	Title:	 	


 [Signature Page – Registration Rights Agreement] 












 IN WITNESS WHEREOF, the parties have executed this Registration Rights Agreement as of the
date first written above. 
 HOLDERS: 
  

			
	[•]
		
	By:	 	 
	Name:	 	[•]
	Title:	 	[•]

  

	☐	 By checking this box, the Holder signing above hereby requests the inclusion of all of its Registrable
Securities in the Initial Shelf Registration Statement. 


  

	☐	 By checking this box, the Holder signing above hereby requests the inclusion of _____________________of its
Registrable Securities in the Initial Shelf Registration Statement, constituting less than all of its Registrable Securities. 



[Signature Page – Registration Rights Agreement] 












 Exhibit A 

FORM OF JOINDER 
 The undersigned
is executing and delivering this joinder (the “Joinder”) pursuant to the Registration Rights Agreement, dated as of [•], 2021 (including all exhibits thereto and as may be amended, supplemented or amended and restated from time
to time in accordance with the terms thereof, the “Registration Rights Agreement”), by and among Diamond Offshore Drilling, Inc. (the “Company”), the other parties signatory thereto and any additional parties
identified on the signature pages of any joinder thereto. Each capitalized term not otherwise defined herein has the meaning given to it in the Registration Rights Agreement. 

By executing and delivering this Joinder to the Company, the undersigned hereby agrees to become a party to, to be bound by, and to comply
with the provisions of the Registration Rights Agreement as a Holder in the same manner as if the undersigned were an original signatory to the Registration Rights Agreement. 

Accordingly, the undersigned has executed and delivered this Joinder as of the [•] day of [•], 20[•]. 

 

			
	HOLDER
	
	[•]


			
		
	By:	 	 


			
	Name: [•]	 	
	Title: [•]	 	













 Exhibit B 

FORM OF SELLING STOCKHOLDER QUESTIONNAIRE 

The undersigned (the “Selling Stockholder”) beneficial owner of New Diamond Common Shares understands that Diamond Offshore
Drilling, Inc. (the “Company”) intends to file with the Securities and Exchange Commission (the “Commission”) a registration statement on Form S-1 or, if eligible, Form S-3 (the “Registration Statement”) for the registration and resale under Rule 415 of the Securities Act of 1933, as amended (the “Securities Act”), of certain Registrable Securities
in accordance with the terms of the Registration Rights Agreement, dated as of [•], 2021 (including all exhibits thereto and as may be amended, supplemented or amended and restated from time to time in accordance with the terms thereof, the
“Registration Rights Agreement”), by and among the Company, the other parties signatory thereto and any additional parties identified on the signature pages of any joinder thereto. Each capitalized term not otherwise defined herein
has the meaning given to it in the Registration Rights Agreement. 
 In order to sell or otherwise dispose of any Registrable Securities
pursuant to the Registration Statement, the Selling Stockholder must be named as a selling stockholder in the related prospectus and deliver a prospectus to the purchasers of Registrable Securities. To facilitate naming of the Selling Stockholder as
a selling stockholder in the Registration Statement, the Selling Stockholder must complete, execute, acknowledge and deliver this Selling Stockholder Questionnaire prior to filing of the Registration Statement. 

Certain legal consequences arise from being named as selling stockholder in the Registration Statement and the related prospectus.
Accordingly, the Selling Stockholder is advised to consult its own legal counsel regarding the consequences of being named or not being named as a selling stockholder in the Registration Statement and the related prospectus. 

The Selling Stockholder hereby gives notice to the Company of its intention to sell or otherwise dispose of Registrable Securities
beneficially owned by it and listed below in Item 3(b) pursuant to the Registration Statement. The Selling Stockholder, by signing and returning this Selling Stockholder Questionnaire, understands that it shall be bound by the terms and conditions
of this Selling Stockholder Questionnaire. 
 The Selling Stockholder must deliver this Selling Stockholder Questionnaire to the Company
by [•], 2021. The Company shall be permitted to exclude any Selling Stockholder from being a selling stockholder in the Registration Statement if this Selling Stockholder Questionnaire is delivered to the Company after such date. 

The Selling Stockholder hereby provides the following information to the Company and represents and warrants that such information is accurate
and complete: 
  

					
	1.	  	(a)	  	Full Legal Name of Selling Stockholder:
		  		  	  

		  		  	  















					
		  	(b)	  	Full Legal Name of Registered Holder (if not the same as (a) above) through which Registrable Securities listed in Item (3) below are held:
		  		  	  

		  		  	  

			
		  	(c)	  	Full Legal Name of DTC Participant (if applicable and if not the same as (b) above) through which Registrable Securities listed in Item (3) below are held:
		  		  	  

		  		  	  

		
	2.	  	Address for Notices to Selling Stockholder:
                                         
                                         
                                         
 
		
		  	  

		  	  

		
		  	Telephone:
                                         
                                         
                                         
                                         

		  	Fax:	  	
		  	Email address:
                                         
                                         
                                         
                                         

		  	Contact
Person:                                        
                                         
                                         
                                         
 
		
	3.	  	Beneficial Ownership of Registrable Securities:
		
		  	This Item (3) covers beneficial ownership of the Company’s equity securities. Please consult Appendix A to this Selling Stockholder Questionnaire for information as to the meaning of “beneficial
ownership.” Except as set forth below in this Item (3), the Selling Stockholder does not beneficially own any Registrable Securities.
			
		  	(a)	  	Number of Registrable Securities beneficially
owned:                                        
                        
			
		  	(b)	  	Number of Registrable Securities which the Selling Stockholder wishes to be included in the Registration Statement:
                            
		
	4.	  	Beneficial Ownership of other equity securities of the Company owned by the Selling Stockholder.
		
		  	Except as set forth below in this Item (4), the Selling Stockholder is not the beneficial or registered owner of any securities of the Company other than the Registrable Securities listed above in Item (3).
			
		  	(a)	  	Type and amount of other securities beneficially owned by the Selling Stockholder:
		  		  	  

		  		  	  

			
		  	(b)	  	CUSIP No(s). of other securities beneficially owned by the Selling Stockholder:
		  		  	  

		  		  	  















							
		
	5.	  	Relationship with the Company:
			
		  	(a)	  	Have you or any of your affiliates, officers, directors or principal equity holders (owners of 5% or more of the equity securities of the Selling Stockholder) held any position or office or have you had any other
material relationship with the Company (or its predecessors or affiliates) within the past three years?
				
		  		  	☐	  	Yes
				
		  		  	☐	  	No
			
		  	(b)	  	If so, please state the nature and duration of your relationship with the Company:
		  		  	  

		  		  	  

		
	6.	  	Broker-Dealer Status:
			
		  	(a)	  	Is the Selling Stockholder a broker-dealer registered pursuant to Section 15 of the Exchange Act?
				
		  		  	☐	  	Yes
				
		  		  	☐	  	No
			
		  		  	If so, please answer the question below.
			
		  		  	If the Selling Stockholder is a registered broker-dealer, please indicate whether the Selling Stockholder acquired its Registrable Securities for investment or acquired them as transaction-based compensation for
investment banking or similar services.
		  		  	  

		  		  	  

			
		  		  	Note that if the Selling Stockholder is a registered broker-dealer and received its Registrable Securities other than as transaction-based compensation, the Company is required to identify the Selling
Stockholder as an underwriter in the Registration Statement and related prospectus.
			
		  	(b)	  	Affiliation with Broker-Dealers:
			
		  		  	Is the Selling Stockholder an affiliate of a registered broker-dealer? For purposes of this Item 6(b), an “affiliate” of a specified person or entity means a person or entity that directly, or indirectly
through one or more intermediaries, controls or is controlled by, or is under common control with, the person or entity specified.
				
		  		  	☐	  	Yes
				
		  		  	☐	  	No














							
			
		  		  	If so, please answer the remaining questions in this section:
				
		  		  	(i)	  	Please describe the affiliation between the Selling Stockholder and any registered broker-dealers:
		  		  		  	  

		  		  		  	  

				
		  		  	(ii)	  	If the Selling Stockholder, at the time of its acquisition of the Registrable Securities, had any agreements or understandings, directly or indirectly, with any person to distribute the Registrable Securities, please describe such
agreements or understandings:
		  		  		  	  

		  		  		  	  

				
		  		  		  	Note that if the Selling Stockholder is an affiliate of a broker-dealer and at the time of the acquisition of the Registrable Securities had any agreements or understandings, directly or indirectly, to distribute
the securities, the Company must identify the Selling Stockholder as an underwriter in the prospectus.
		
	7.	  	Nature of Beneficial Holding. The purpose of this question is to identify the ultimate natural person(s) or publicly held entity that exercise(s) sole or shared voting or dispositive power over the Registrable
Securities.
			
		  	(a)	  	Is the Selling Stockholder required to file, or is it a wholly-owned subsidiary of a company that is required to file, periodic and other reports (for example, Forms 10-K, 10-Q and 8-K) with the Commission pursuant to
Section 13(a) or 15(d) of the Exchange Act?
				
		  		  	☐	  	Yes
				
		  		  	☐	  	No
			
		  	(b)	  	State whether the Selling Stockholder is an investment company, or a subsidiary of an investment company, registered under the Investment Company Act of 1940, as amended:
				
		  		  	☐	  	Yes
				
		  		  	☐	  	No
			
		  	(c)	  	If a subsidiary, please identify the publicly held parent entity:
		  		  	  

		  		  	  















							
		
		  	If you answered “No” to questions (a) and (b) above, please identify the controlling person(s) of the Selling Stockholder (the “Controlling Entity”). If the Controlling Entity is not a
natural person or a publicly held entity, please identify each controlling person(s) of
		
		  	such Controlling Entity. This process should be repeated until you reach natural persons or a publicly held entity that exercise sole or shared voting or dispositive power over the Registrable Securities:
		  	                                    
                                         
                                         
                                         
                                         
                                         
 
		  	                                    
                                         
                                         
                                         
                                         
                                         
 

 ***PLEASE NOTE THAT THE COMMISSION REQUIRES THAT THESE NATURAL PERSONS BE NAMED IN THE PROSPECTUS*** 

If you need more space for this response, please attach additional sheets of paper. Please be sure to indicate your name and the number of the
item being responded to on each such additional sheet of paper, and to sign each such additional sheet of paper before attaching it to this Selling Stockholder Questionnaire. Please note that you may be asked to answer additional questions depending
on your responses to the above questions. 
 The Selling Stockholder acknowledges that it understands its obligation to comply with the
provisions of the Exchange Act and the rules thereunder relating to stock manipulation, particularly Regulation M thereunder (or any successor rules or regulations), in connection with any offering of Registrable Securities pursuant to the
Registration Statement. The Selling Stockholder agrees that neither it nor any person acting on its behalf shall engage in any transaction in violation of such provisions. 

The Selling Stockholder agrees to provide such information as may be required by law or under the Registration Rights Agreement for inclusion
in the Registration Statement and any additional information the Company may reasonably request and to promptly notify the Company of any inaccuracies or changes in the information provided that may occur at any time while the Registration Statement
remains effective. 
 In the event the Selling Stockholder transfers all or any portion of the Registrable Securities listed in Item
(3) above after the date on which such information is provided to the Company, the Selling Stockholder shall notify the transferee(s) at the time of transfer of its rights and obligations under this Selling Stockholder Questionnaire and the
Registration Rights Agreement. 
 By signing this Selling Stockholder Questionnaire, the Selling Stockholder consents to the disclosure of
the information contained herein in its answers to Items (1) through (6) and, to the extent required under securities laws, Item 7 above and the inclusion of such information in the Registration Statement, the related prospectus and any state
securities or Blue Sky applications. The Selling Stockholder understands that such information shall be relied upon by the Company without independent investigation or inquiry in connection with the preparation or amendment of the Registration
Statement, the related prospectus and any state securities or Blue Sky applications. 
 Once this Selling Stockholder Questionnaire is
executed by the Selling Stockholder and delivered to the Company, the terms of this Selling Stockholder Questionnaire and the representations, warranties and indemnification contained herein shall be binding on, shall inure to the benefit of, and
shall be enforceable by the respective successors, heirs, personal representatives and assigns of the Company and the Selling Stockholder with respect to the Registrable Securities beneficially owned by such Selling Stockholder and listed in Item
(3) above. 












 This Selling Stockholder Questionnaire shall be governed by, and construed in accordance with, the laws of
the State of New York, without giving effect to any choice of law or conflict of law rules or provisions (whether of the State of New York or any other jurisdiction) to the extent such rules or provisions would cause the application of the laws of
any jurisdiction other than the State of New York. 
 [SIGNATURE PAGE FOLLOWS] 












 IN WITNESS WHEREOF, the undersigned, by authority duly given, has caused this Selling
Stockholder Questionnaire to be executed and delivered either in person or by its authorized agent. 
 Dated: 

 

			
	Selling Stockholder:
		
	By:	 	 
		 	Name:
		 	Title:


 Please email a PDF of the fully completed and executed Selling Stockholder Questionnaire to: 

[•] 

[SIGNATURE PAGE TO SELLING STOCKHOLDER QUESTIONNAIRE]













 Appendix A 

DEFINITION OF “BENEFICIAL OWNERSHIP” 
  

	1.	 A “Beneficial Owner” of a security includes any person who, directly or indirectly, through any
contract, arrangement, understanding, relationship or otherwise has or shares: 


 (a) Voting power which
includes the power to vote, or to direct the voting of, such security; and/or 
 (b) Investment power which includes the
power to dispose, or direct the disposition of, such security. 
 Please note that either voting power or investment power, or both, is
sufficient for you to be considered the beneficial owner of shares. 
  

	2.	 Any person who, directly or indirectly, creates or uses a trust, proxy, power of attorney, pooling arrangement
or any other contract, arrangement or device with the purpose or effect of divesting such person of beneficial ownership of a security or preventing the vesting of such beneficial ownership as part of a plan or scheme to evade the reporting
requirements of the federal securities acts shall be deemed to be the beneficial owner of such security. 


  

	3.	 Notwithstanding the provisions of paragraph (1), a person is deemed to be the “beneficial owner” of a
security if that person has the right to acquire beneficial ownership of such security within 60 days, including but not limited to any right to acquire: (a) through the exercise of any option, warrant or right; (b) through the conversion
of a security; (c) pursuant to the power to revoke a trust, discretionary account or similar arrangement; or (d) pursuant to the automatic termination of a trust, discretionary account or similar arrangement; provided,
however, any person who acquires a security or power specified in (a), (b) or (c) above, with the purpose or effect of changing or influencing the control of the issuer, or in connection with or as a participant in any transaction having
such purpose or effect, immediately upon such acquisition shall be deemed to be the beneficial owner of the securities which may be acquired through the exercise or conversion of such security or power. 














 Exhibit C 

FORM OF PLAN OF DISTRIBUTION 
 The Selling
Stockholders intend to distribute the Registrable Securities pursuant to the Shelf Registration Statement only as follows: such Registrable Securities may be sold from time to time directly by the Selling Stockholders or alternatively through
broker-dealers or agents. If the Registrable Securities are sold through broker-dealers or agents, the Selling Stockholders shall be responsible for discounts or commissions. Such Registrable Securities may be sold in one or more transactions at
fixed prices, at prevailing market prices at the time of sale, at varying prices determined at the time of sale or at negotiated prices. Such sales may be effected in transactions (which may involve crosses or block transactions) (i) on any
national securities exchange or quotation service on which the Registrable Securities may be listed or quoted at the time of sale, (ii) in the over-the-counter
market, or (iii) in transactions otherwise than on such exchanges or services or in the over-the-counter market. In no event will such method(s) of distribution
take the form of an underwritten offering of the Registrable Securities.