Document:

EX-10.57

 Exhibit 10.57 

 

					
	

	 	Bioventus	    	1-919-474-6700
	 	4721 Emperor Blvd., Suite 100	    	1-800-396-4325
	 	Durham, NC 27703	    	www.BioventusGlobal.com
	 	USA	    	

 February 3, 2021 
 Ken
Reali 
 c/o Bioventus LLC 
 4721 Emperor Boulevard, Suite 100

 Durham, NC 27703 
 Dear Ken: 

As discussed, for ten dollars ($10) and other good and valuable consideration, the receipt and sufficiency of which is hereby acknowledged, effective as of the
date hereof, you hereby agree to forfeit the option to purchase 5,935 common or profit interest units in Bioventus LLC (the “Company”) or an equivalent number of equity interests of a successor entity (the “Option”)
that was granted to you in that certain letter agreement dated July 30, 2020 (the “Option Letter Agreement”). 
 Following such
forfeiture, you will no longer hold any equity interest, or any right to acquire any equity interest, in the Company or any of its subsidiaries, affiliates or successors pursuant to the Option, and you and the Company will not have any rights or
obligations under the Option Letter Agreement following the date hereof. 
 Please kindly acknowledge your acceptance of this letter by signing where your
name appears below. By signing below, you acknowledge that you have reviewed this letter, have had the opportunity to raise questions with the Company regarding the forfeiture of the Option, and voluntarily and knowingly accept and agree to the
provisions set forth herein. Following your acceptance of this letter, the Company and its transfer agent will make any and all appropriate adjustments to its books and records to reflect the foregoing. This letter shall be governed and construed
under the internal laws of the State of Delaware and may be executed in several counterparts. 
  

					
	Very truly yours,
		
		 	Bioventus LLC
			
	      	 	By:	 	 /s/ Leigh Ann Stradford

		 	Name:	 	Leigh Ann Stradford
		 	Title:	 	SVP & Chief Human Resources Officer

  

	
	ACCEPTED AND AGREED:
	
	 /s/ Ken Reali

	Ken RealiExhibit 10.1

 

EXECUTION VERSION

 

SPONSOR LETTER AGREEMENT

 

This SPONSOR
LETTER AGREEMENT (this “Agreement”), dated as of February 10, 2021, is made by and among Atlas Crest
Investment LLC, a Delaware limited liability company (the “Sponsor”), Atlas Crest Investment Corp., a
Delaware corporation (“Atlas”), Archer Aviation Inc., a Delaware corporation (the
“Company”) and, solely for purposes of Sections 5, 7 and 8 (and the other sections of this Agreement
solely to the extent relating to Sections 5, 7 and 8), certain individuals, each of whom is a member of Atlas’s board
of directors and/or management (the “Insiders”). The Sponsor, Atlas, the Company and the Insiders (solely
for purposes of Sections 5, 7 and 8 (and the other sections of this Agreement solely to the extent relating to Sections 5, 7
and 8)) shall be referred to herein from time to time collectively as the “Parties”. Capitalized terms
used but not otherwise defined herein shall have the meanings ascribed to such terms in the Business Combination Agreement
(as defined below).

 

WHEREAS, Atlas, the
Company and certain other Persons party thereto entered into that certain Business Combination Agreement, dated as of the date
hereof (as it may be amended, restated or otherwise modified from time to time in accordance with its terms, the “Business
Combination Agreement”); and

 

WHEREAS, the Business
Combination Agreement contemplates that the Parties will enter into this Agreement concurrently with the entry into the Business
Combination Agreement by the parties thereto, pursuant to which, among other things, (a) the Sponsor will vote in favor of approval
of the Business Combination Agreement and the transactions contemplated thereby (including the Merger), (b) the Sponsor will
agree to waive any adjustment to the conversion ratio set forth in the Governing Documents of Atlas or any other anti-dilution
or similar protection with respect to all of the Atlas Class B Shares related to the transactions contemplated by the Business
Combination Agreement, (c) the Sponsor will agree to be bound by certain transfer restrictions with respect to its Atlas Class
B Shares and (d) the Insiders, Atlas and Sponsor will agree to terminate certain lock-up provisions of that certain Letter Agreement
dated as of October 27, 2020 by and among Sponsor, Atlas and the Insiders (the “Letter Agreement”).

 

NOW, THEREFORE, in
consideration of the premises and the mutual promises contained herein and for other good and valuable consideration, the receipt
and sufficiency of which are hereby acknowledged, the Parties, each intending to be legally bound, hereby agree as follows:

 

		1.	Agreement to Vote. The Sponsor hereby unconditionally
and irrevocably agrees to vote at any meeting of the shareholders of Atlas (including any adjournment or postponement thereof),
and in any action by written resolution of the shareholders of Atlas, all of the Sponsor’s Atlas Class B Shares in favor
of the Transaction Proposals.

 

		2.	Waiver of Anti-dilution Protection. The Sponsor
hereby (a) waives, subject to, and conditioned upon, the occurrence of the Closing (for itself and for its successors and
assigns), to the fullest extent permitted by law and the Amended and Restated Certificate of Incorporation of Atlas, dated as
of October 29, 2020 and the Amended & Restated Bylaws of Atlas, adopted as of October 29, 2020, and (b) agrees not to assert
or perfect, any rights to adjustment or other anti-dilution protections with respect to the rate that the Atlas Class B Shares
held by it convert into Atlas Class A Shares in connection with the transactions contemplated by the Business Combination Agreement.

 

		3.	Transfer of Shares. The Sponsor hereby agrees that
it shall not, directly or indirectly, (i) sell, assign, transfer (including by operation of law), place a lien on, pledge, dispose
of or otherwise encumber any of its Class B Shares or otherwise agree to do any of the foregoing, (ii) deposit any of its Class
B Shares into a voting trust or enter into a voting agreement or arrangement or grant any proxy or power of attorney with respect
any of its Class B Shares that conflicts with any of the covenants or agreements set forth in this Agreement, (iii) enter into
any contract, option or other arrangement or undertaking with respect to the direct or indirect acquisition or sale, assignment,
transfer (including by operation of law) or other disposition of any of its Class B Shares, (iv) engage in any hedging or other
transaction which is designed to, or which would (either alone or in connection with one or more events, developments or events
(including the satisfaction or waiver of any conditions precedent)), lead to or result in a sale or disposition of its Class B
Shares even if such Class B Shares would be disposed of by a person other than the Sponsor or (v) take any action that would have
the effect of preventing or materially delaying the performance of its obligations hereunder.

 

     

     

    

 

		4.	Redemption; Other Covenants.

 

		a.	Unless this Agreement shall have been terminated in accordance
with Section 6, each of Sponsor and the Insiders, severally and not jointly, hereby agrees that Sponsor or such Insider (as applicable)
shall not effect an Atlas Stockholder Redemption.

 

		b.	The Sponsor hereby agrees to be bound by and subject to
(i) Sections 5.3(a) (Confidentiality) and 5.4(a) (Public Announcements) of the Business Combination Agreement to the same extent
as such provisions apply to the parties to the Business Combination Agreement, as if the Sponsor were directly a party thereto,
and (ii) Section 5.6(b) (Exclusive Dealing) of the Business Combination Agreement to the same extent as such provisions apply
to Atlas as if the Sponsor were directly party thereto.

 

		5.	Termination of Class B Shares Lock-up Period. Each
of the Insiders, Atlas and Sponsor hereby agrees that effective as of the consummation of the Closing (and not before), paragraph
(a) of Section 7 of the Letter Agreement shall be amended and restated in its entirety as follows:

 

 ” 7. (a) Reserved.”

 

In addition, paragraph
(c) of Section 7 of the Letter Agreement shall be amended to remove all references to paragraph (a) of Section 7 and
all references to the Founder Shares.

 

The amendment and restatement
set forth in this Section 5 shall be void and of no force and effect with respect to the Letter Agreement if the Business Combination
Agreement shall be terminated for any reason in accordance with its terms.

 

		6.	Termination. This Agreement shall automatically
terminate, without any notice or other action by any Party, and be void ab initio upon the earlier of (a) the Effective Time;
and (b) the termination of the Business Combination Agreement in accordance with its terms. Upon termination of this Agreement
as provided in the immediately preceding sentence, none of the Parties shall have any further obligations or Liabilities under,
or with respect to, this Agreement. Notwithstanding the foregoing or anything to the contrary in this Agreement, (i) the termination
of this Agreement pursuant to Section 6(b) shall not affect any Liability on the part of any Party for a Willful Breach of
any covenant or agreement set forth in this Agreement prior to such termination or Fraud, (ii) Sections 2, 5 and 10 (solely to
the extent related to the foregoing Sections 2 or 5) shall each survive the termination of this Agreement pursuant to Section
6(a), and (iii) Sections 7, 8, 9 and 10 (solely to the extent related to the foregoing Sections 7, 8 or 9) shall survive any termination
of this Agreement.

 

		7.	No Recourse. Except for claims pursuant to the Business
Combination Agreement or any other Ancillary Document by any party(ies) thereto against any other party(ies) thereto, each Party
agrees that (a) this Agreement may only be enforced against, and any action for breach of this Agreement may only be made against,
the Parties, and no claims of any nature whatsoever (whether in tort, contract or otherwise) arising under or relating to this
Agreement, the negotiation hereof or its subject matter, or the transactions contemplated hereby shall be asserted against any
Company Non-Party Affiliate or any Atlas Non-Party Affiliate (other than the Sponsor and Insiders named as a party hereto, on
the terms and subject to the conditions set forth herein), and (b) none of the the Company Non-Party Affiliates or the Atlas Non-Party
Affiliates (other than the Sponsor and Insiders named as a party hereto, on the terms and subject to the conditions set forth
herein) shall have any Liability arising out of or relating to this Agreement, the negotiation hereof or its subject matter, or
the transactions contemplated hereby, including with respect to any claim (whether in tort, contract or otherwise) for breach
of this Agreement or in respect of any written or oral representations made or alleged to be made in connection herewith, as expressly
provided herein, or for any actual or alleged inaccuracies, misstatements or omissions with respect to any information or materials
of any kind furnished in connection with this Agreement, the negotiation hereof or the transactions contemplated hereby.

 

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		8.	Fiduciary Duties. Notwithstanding anything in this
Agreement to the contrary, (a) the Sponsor makes no agreement or understanding herein in any capacity other than in the Sponsor’s
capacity as a record holder and beneficial owner of Atlas Class B Shares, each Insider makes no agreement or understanding herein
in any capacity other than in such Insider’s capacity as a direct or indirect investor in the Sponsor, and not, in the case
of any Insider, in such Insider’s capacity as a director, officer or employee of any Atlas Party, and (b) nothing herein
will be construed to limit or affect any action or inaction by any Insider or any representative of the Sponsor serving as a member
of the board of directors (or other similar governing body) of any Atlas Party or as an officer, employee or fiduciary of any
Atlas Party, in each case, acting in such person’s capacity as a director, officer, employee or fiduciary of such Atlas
Party.

 

		9.	No Third Party Beneficiaries. This Agreement shall
be for the sole benefit of the Parties and their respective successors and permitted assigns and is not intended, nor shall be
construed, to give any Person, other than the Parties and their respective successors and assigns, any legal or equitable right,
benefit or remedy of any nature whatsoever by reason this Agreement. Nothing in this Agreement, expressed or implied, is intended
to or shall constitute the Parties, partners or participants in a joint venture.

 

		10.	Incorporation by Reference. Sections 8.1 (Non-Survival),
8.2 (Entire Agreement; Assignment). 8.3 (Amendment), 8.5 (Governing Law), 8.7 (Construction; Interpretation), 8.10 (Severability),
8.11 (Counterparts; Electronic Signatures), 8.15 (Waiver of Jury Trial), 8.16 (Submission to Jurisdiction) and 8.17 (Remedies)
of the Business Combination Agreement are incorporated herein and shall apply to this Agreement mutatis mutandis.

 

[signature page follows]

 

 

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IN WITNESS WHEREOF, each of the Parties
has caused this Agreement to be duly executed on its behalf as of the day and year first above written.

 

	 	ATLAS CREST INVESTMENT CORP.
	 	 	 	 
	 	By:	/s/ Michael Spellacy
	 	 	Name:	Michael Spellacy
	 	 	Title:	Chief Executive Officer
	 	 	 	 
	 	ATLAS CREST INVESTMENT LLC
	 	 	 	 
	 	By:	/s/ Kenneth Moelis
	 	 	Name:	Kenneth Moelis
	 	 	Title:	Managing Member
	 	 	 	 
	 	ARCHER AVIATION INC.
	 	 	 	 
	 	By:	/s/ Brett Adcock
	 	 	Name:	Brett Adcock
	 	 	Title:	Chief Executive Officer

 

[Signature Page to Sponsor
Letter Agreement]

 

    4

     

    

 

	 	INSIDERS:
	 	 	 
	 	By:	/s/ Kenneth Moelis
	 		Name: Kenneth Moelis
	 	 	 
	 	By:	/s/ Michael Spellacy
	 	 	Name: Michael Spellacy
	 	 	 
	 	By:	/s/  Taylor Rettig
	 	 	Name: Taylor Rettig
	 	 	 
	 	By:	/s/ Christopher Callesano
	 	 	Name: Christopher Callesano
	 	 	 
	 	By:	/s/ David Fox
	 	 	Name: David Fox
	 	 	 
	 	By:	/s/ Emanuel Pearlman
	 	 	Name: Emanuel Pearlman
	 	 	 
	 	By:	/s/ Eileen Murray
	 	 	Name: Eileen Murray
	 	 	 
	 	By:	/s/ Todd Lemkin
	 	 	Name: Todd Lemkin

 

[Signature Page to Sponsor
Letter Agreement]

 

 

5

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