EX-10.10





 Exhibit 10.10 

LOCK-UP AGREEMENT 

This lock-up agreement (this “Agreement”) is made and entered into as of
March 7, 2021 (the “Effective Date”), by and among (i) dMY Technology Group, Inc. III, a Delaware corporation (the “Company”), (ii) dMY Sponsor III, LLC, a Delaware limited liability company
(the “Sponsor”), (iii) each of the parties listed on Schedule 1 attached hereto (the “Management Holders”), (iv) each of the parties listed on Schedule 2 attached hereto (the
“Sellers”), and (v) Darla Anderson, Francesca Luthi, and Charles E. Wert (collectively, the “dMY Independent Directors” and together with the Sponsor, the “Founder
Holders”). The Founder Holders, the Management Holders, the Sellers and any person or entity who hereafter becomes a party to this Agreement are referred to herein, individually, as a “Securityholder” and, collectively, as the
“Securityholders.” 
 Capitalized terms used but not defined herein have the meanings ascribed in the Agreement and Plan of Merger
(the “MA”) dated as of the date hereof, entered into by and among the Company, IonQ, Inc., a Delaware corporation (“IonQ”), and Ion Trap Acquisition Inc., a Delaware corporation and a wholly owned
subsidiary of the Company (“Merger Sub”), pursuant to which, among other things, Merger Sub will be merged with and into IonQ (the “Merger”), with IonQ surviving the Merger as a wholly owned subsidiary
of the Company. 
 WHEREAS, pursuant to the MA, and in view of the valuable consideration to be received by the parties thereunder, the
parties desire to enter into this Agreement, pursuant to which the Lock-up Shares (as defined below) shall become subject to limitations on disposition as set forth herein. 

NOW, THEREFORE, in consideration of the premises set forth above, which are incorporated in this Agreement as if fully set forth below, and
intending to be legally bound hereby, the parties hereby agree as follows: 
 1. Subject to the exceptions set forth herein, the
Securityholders agree not to, without the prior written consent of the board of directors of the Company, (i) sell, offer to sell, contract or agree to sell, hypothecate, pledge, grant any option, right or warrant to purchase or otherwise
transfer, dispose of or agree to transfer or dispose of, directly or indirectly, or establish or increase a put equivalent position or liquidate or decrease a call equivalent position within the meaning of Section 16 of the Securities Exchange
Act of 1934, as amended (the “Exchange Act”), and the rules and regulations of the Securities and Exchange Commission promulgated thereunder, any shares of the Company’s Common Stock, par value $0.0001 per share (the
“Common Stock”) held by it immediately after the Effective Time (including Common Stock acquired as part of the PIPE Investment or issued in exchange for, or on conversion or exercise of, any securities issued as part of the
PIPE Investment), any shares of Common Stock issuable upon the exercise of options to purchase shares of Common Stock held by it immediately after the Effective Time, or any securities convertible into or exercisable or exchangeable for Common Stock
held by it immediately after the Effective Time (the “Lock-up Shares”), (ii) enter into any swap or other arrangement that transfers to another, in whole or in part, any of the economic
consequences of ownership of any of the Lock-up Shares, whether any such transaction is to be settled by delivery of such securities, in cash or otherwise or (iii) publicly announce any intention to
effect any transaction specified in clause (i) or (ii) (the actions specified in clauses (i)-(iii), collectively, “Transfer”) during the period beginning on the Closing Date and ending on the date described in Paragraph
3 (the “Lock-Up Period”). 
 2. The restrictions set forth in paragraph 1
shall not apply to: 
  

	 	(i)	 in the case of an entity, a Transfer (A) to another entity that is an affiliate (as defined in Rule 405
promulgated under the Securities Act of 1933, as amended) of the undersigned, or to any investment fund or other entity controlling, controlled by, managing or managed by or under common control with the undersigned or affiliates of the undersigned
or who shares a common investment advisor with the undersigned or (B) as part of a distribution to members, partners or shareholders of the undersigned; 



  
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	 	(ii)	 in the case of an individual, Transfers by gift to members of the individual’s immediate family (as
defined below) or to a trust, the beneficiary of which is a member of one of the individual’s immediate family, an affiliate of such person or to a charitable organization; 



 

	 	(iii)	 in the case of an individual, Transfers by virtue of laws of descent and distribution upon death of the
individual; 


  

	 	(iv)	 in the case of an individual, Transfers by operation of law or pursuant to a court order, such as a qualified
domestic relations order, divorce decree or separation agreement; 


  

	 	(v)	 in the case of an individual, Transfers to a partnership, limited liability company or other entity of which
the undersigned and/or the immediate family (as defined below) of the undersigned are the legal and beneficial owner of all of the outstanding equity securities or similar interests; 



 

	 	(vi)	 in the case of an entity that is a trust, Transfers to a trustor or beneficiary of the trust or to the estate
of a beneficiary of such trust; 


  

	 	(vii)	 in the case of an entity, Transfers by virtue of the laws of the state of the entity’s organization and
the entity’s organizational documents upon dissolution of the entity; 


  

	 	(viii)	 Transfers relating to Common Stock or other securities convertible into or exercisable or exchangeable for
Common Stock acquired in open market transactions after the Closing, provided that no such transaction is required to be, or is, publicly announced (whether on Form 4, Form 5 or otherwise, other than a required filing on Schedule 13F, 13G or
13G/A) during the Lock-Up Period; 


  

	 	(ix)	 in the case of the Sponsor, Transfers of the dMY Private Warrants (with any
lock-up relating to the dMY Private Warrants and the shares issuable upon the exercise thereof continuing to be governed by the letter agreement, dated as of November 12, 2020, by and among the Company,
the Sponsor and certain Insiders (as defined therein) signatory thereto and not by this Agreement); 


  

	 	(x)	 the exercise of stock options or warrants to purchase shares of Common Stock or the vesting of stock awards of
Common Stock and any related transfer of shares of Common Stock to the Company in connection therewith (x) deemed to occur upon the “cashless” or “net” exercise of such options or warrants or (y) for the purpose of
paying the exercise price of such options or warrants or for paying taxes due as a result of the exercise of such options or warrants, the vesting of such options, warrants or stock awards, or as a result of the vesting of such shares of Common
Stock, it being understood that all shares of Common Stock received upon such exercise, vesting or transfer will remain subject to the restrictions of this Agreement during the Lock-Up Period;



  

	 	(xi)	 Transfers to the Company pursuant to any contractual arrangement in effect at the Effective Time that provides
for the repurchase by the Company or forfeiture of Common Stock or other securities convertible into or exercisable or exchangeable for Common Stock in connection with the termination of the Securityholder’s service to the Company;




  
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	 	(xii)	 the entry, by the Securityholder, at any time after the Effective Time, of any trading plan providing for the
sale of shares of Common Stock by the Securityholder, which trading plan meets the requirements of Rule 10b5-1(c) under the Exchange Act, provided, however, that such plan does not provide for,
or permit, the sale of any shares of Common Stock during the Lock-Up Period and no public announcement or filing is voluntarily made or required regarding such plan during the
Lock-Up Period; 


  

	 	(xiii)	 Transfers in the event of completion of a liquidation, merger, stock exchange or other similar transaction
which results in all of the Company’s securityholders having the right to exchange their shares of Common Stock for cash, securities or other property; and 



 

	 	(xiv)	 Transfers to satisfy any U.S. federal, state, or local income tax obligations of the Securityholder (or its
direct or indirect owners) arising from a change in the U.S. Internal Revenue Code of 1986, as amended (the “Code”), or the U.S. Treasury Regulations promulgated thereunder (the “Regulations”) after
the date on which the MA was executed by the parties, and such change prevents the Merger from qualifying as a “reorganization” pursuant to Section 368 of the Code (and the Merger does not qualify for similar tax-free treatment pursuant to any successor or other provision of the Code or Regulations taking into account such changes), in each case solely and to the extent necessary to cover any tax liability as a direct
result of the transaction. 


 provided, however, that (A) in the case of clauses (i) through (vii), these permitted
transferees must enter into a written agreement, in substantially the form of this Agreement (it being understood that any references to “immediate family” in the agreement executed by such transferee shall expressly refer only to the
immediate family of the Securityholder and not to the immediate family of the transferee), agreeing to be bound by these Transfer restrictions. For purposes of this paragraph, “immediate family” shall mean a spouse, domestic partner, child
(including by adoption), father, mother, brother or sister of the undersigned, and lineal descendant (including by adoption) of the undersigned or of any of the foregoing persons; and “affiliate” shall have the meaning set forth in Rule
405 under the Securities Act of 1933, as amended. 
 3. The Lock-Up Period shall terminate
(i) for Sellers, upon the earlier of (x) 180 days after the Closing Date and (y) the date on which the Company completes a liquidation, merger, capital stock exchange, reorganization or other similar transaction that results in all of the
Company’s stockholders having the right to exchange their shares for cash, securities or other property, (ii) for Management Holders, upon the earlier of (x) 365 days after the Closing Date, (y) the day after the date on which the
closing price of the Company’s common stock equals or exceeds $12.00 per share (as adjusted for stock splits, stock dividends, reorganizations, recapitalizations and the like) for any 20 trading days within any
30-trading day period commencing at least 180 days after the Closing Date and (z) the date on which the Company completes a liquidation, merger, capital stock exchange, reorganization or other similar
transaction that results in all of the Company’s stockholders having the right to exchange their shares for cash, securities or other property, and (iii) for Founder Holders, upon the earlier of (x) 365 days after the Closing Date,
(y) the day after the date on which the closing price of the Company’s common stock equals or exceeds $12.00 per share (as adjusted for stock splits, stock dividends, reorganizations, recapitalizations and the like) for any 20 trading days
within any 30-trading day period commencing at least 150 days after the Closing Date and (z) the date on which the Company completes a liquidation, merger, capital stock exchange, reorganization or other
similar transaction that results in all of the Company’s stockholders having the right to exchange their shares for cash, securities or other property. 

  
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 4. In the event that (i) the Company releases, in full or in part, any director or
officer of the Company or any other party subject to a lock-up agreement and (ii) such release or series of releases cumulatively relates to more than 1,000,000 shares of Common Stock (as adjusted for any
stock dividend, stock split, combination of shares, reclassification, recapitalization or other similar event), then the other Securityholders shall be automatically released from the restrictions on Transfer set forth in this Letter Agreement to
the same extent, with respect to the same percentage of Common Stock of such Securityholders as the percentage of Common Stock being released with respect to the released party represent with respect to the Company securities held by the released
party (calculated as a percentage of the total outstanding shares of Common Stock held by the released party) at the time of the request made for the release by the released party. In the event of any such release, the Company shall use its
reasonable best efforts to notify the Securityholders within two (2) business days of the occurrence of the release. 
 5. For the
avoidance of doubt, each Securityholder shall retain all of its rights as a stockholder of the Company with respect to the Lock-up Shares during
the Lock-Up Period, including the right to vote any Lock-up Shares that are entitled to vote. 

6. The lock-up provisions in Section 7(a) of the letter agreement, dated as of November 12,
2020, by and among the Company, the Sponsor and certain Insiders (as defined therein) signatory thereto, shall terminate and be of no further force or effect upon the effectiveness of the lock-up provisions of
this Agreement. 
 7. In furtherance of the foregoing, the Company, and any duly appointed transfer agent for the registration or transfer of
the securities described therein, are hereby authorized to decline to make any transfer of securities if such transfer would constitute a violation or breach of this Agreement, and such purported Transfer shall be null and void ab initio. In
addition, during the Lock-Up Period, each certificate or book-entry position evidencing the Lock-Up Shares shall be marked with a legend in substantially the following
form, in addition to any other applicable legends: 
 “THE SECURITIES REPRESENTED HEREBY ARE SUBJECT TO RESTRICTIONS ON TRANSFER SET
FORTH IN A LOCK-UP AGREEMENT BY AND AMONG THE COMPANY AND THE REGISTERED HOLDER OF THE SECURITIES (OR THE PREDECESSOR IN INTEREST TO THE SECURITIES). A COPY OF SUCH
LOCK-UP AGREEMENT WILL BE FURNISHED WITHOUT CHARGE BY THE COMPANY TO THE HOLDER HEREOF UPON WRITTEN REQUEST.” 

8. This Agreement constitutes the entire agreement and understanding of the parties hereto in respect of the subject matter hereof and
supersedes all prior understandings, agreements or representations by or among the parties hereto, written or oral, to the extent they relate in any way to the subject matter hereof or the transactions contemplated hereby provided, that, for
the avoidance of doubt, the foregoing shall not affect the rights and obligations of the parties under the MA or any Subscription Agreement or any documents related thereto or referred to therein. This Agreement may not be changed, amended, modified
or waived (other than to correct a typographical error) as to any particular provision, except by a written instrument executed by the undersigned (i) Securityholder and (ii) the Company. 

9. No party hereto may assign either this Agreement or any of its rights, interests or obligations hereunder without the prior written consent
of the other party. Any purported assignment in violation of this paragraph shall be void and ineffectual and shall not operate to transfer or assign any interest or title to the purported assignee. This Agreement shall be binding on the
Securityholder and each of its respective successors, heirs and assigns and permitted transferees. 
 10. The Law of the State of Delaware
shall govern (a) all claims or matters related to or arising from this Agreement (including any tort or non-contractual claims) and (b) any questions concerning the construction, interpretation,
validity and enforceability of this Agreement, and the performance of the obligations imposed by this Agreement, in each case without giving effect to any choice of law or conflict of law rules or provisions (whether of the State of Delaware or any
other jurisdiction) that would cause the application of the Law of any jurisdiction other than the State of Delaware. 

  
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 11. Each party hereto submits to the exclusive jurisdiction of first, the Court of Chancery
of the State of Delaware or if such court declines jurisdiction, then to any court of the State of Delaware or the Federal District Court for the District of Delaware, in any Proceeding arising out of or relating to this Agreement, agrees that all
claims in respect of the Proceeding shall be heard and determined in any such court and agrees not to bring any Proceeding arising out of or relating to this Agreement in any other courts. Nothing in this paragraph 11, however, shall affect the
right of any party to serve legal process in any other manner permitted by Law or at equity. Each party hereto agrees that a final judgment in any Proceeding so brought shall be conclusive and may be enforced by suit on the judgment or in any other
manner provided by Law or at equity. EACH PARTY HERETO HEREBY IRREVOCABLY WAIVES ALL RIGHTS TO TRIAL BY JURY IN ANY PROCEEDING BROUGHT TO RESOLVE ANY DISPUTE BETWEEN OR AMONG ANY OF THE PARTIES (WHETHER ARISING IN CONTRACT, TORT OR OTHERWISE)
ARISING OUT OF, CONNECTED WITH, RELATED OR INCIDENTAL TO THIS AGREEMENT, THE TRANSACTIONS OR THE RELATIONSHIPS ESTABLISHED AMONG THE PARTIES UNDER THIS AGREEMENT. EACH PARTY FURTHER WARRANTS AND REPRESENTS THAT SUCH PARTY HAS REVIEWED THIS WAIVER
WITH ITS LEGAL COUNSEL, AND THAT SUCH PARTY KNOWINGLY AND VOLUNTARILY WAIVES ITS JURY TRIAL RIGHTS FOLLOWING CONSULTATION WITH LEGAL COUNSEL. 

12. The parties hereto agree that irreparable damage would occur in the event any provision of this Agreement was not performed in accordance
with the terms hereof and that the parties shall be entitled to specific performance of the terms hereof, in addition to any other remedy at law or in equity without the necessity of proving the inadequacy of money damages as a remedy and without
bond or other security being required, this being in addition to any other remedy to which they are entitled at law or in equity. Each of the parties hereto hereby further acknowledges that the existence of any other remedy contemplated by this
Agreement does not diminish the availability of specific performance of the obligations hereunder or any other injunctive relief. It is accordingly agreed that the parties hereto shall be entitled to seek an injunction or injunctions to prevent
breaches of this Agreement and to enforce specifically the terms and provisions of this Agreement in the Court of Chancery or any other state or federal court within the State of Delaware, this being in addition to any other remedy to which such
party is entitled at law or in equity. Each party hereto hereby further agrees that in the event of any action by any other party for specific performance or injunctive relief, it will not assert that a remedy at law or other remedy would be
adequate or that specific performance or injunctive relief in respect of such breach or violation should not be available on the grounds that money damages are adequate or any other grounds 

13. This Agreement shall terminate on the expiration of the Lock-up Period. 

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 IN WITNESS WHEREOF, each of the Parties has duly executed this Lock-Up Agreement as of the Effective Date. 
  

			
	SPONSOR:
	
	DMY SPONSOR III, LLC
		
	By:	 	
                     
    



 
			
	Name:	 	
	Title:	 	



  
 [Signature Page to
Lock-Up Agreement] 













 IN WITNESS WHEREOF, each of the Parties has duly executed this Lock-Up Agreement as of the Effective Date. 
  

			
	COMPANY:
	
	DMY TECHNOLOGY GROUP III, INC.
		
	By:	 	
                     
        



 
			
	Name:	 	
	Title:	 	



  
 [Signature Page to
Lock-Up Agreement]