Document:

Amendment No. 1 to Sixth Amended and Restated Investors' Rights Agreement

 EXHIBIT 4.2A 
 FACEBOOK INC. 
 AMENDMENT NO. 1 

TO 

SIXTH AMENDED AND RESTATED INVESTORS’ RIGHTS AGREEMENT 

This Amendment No. 1 (this “Amendment”) is made as of May 1, 2012 by and
among Facebook, Inc., a Delaware corporation (the “Company”), and the undersigned individuals and entities who are parties to that certain Sixth Amended and Restated Investors’ Rights Agreement, dated as of
December 27, 2010 (the “Rights Agreement”) by and among the Company and the Investors (as defined therein). This Amendment amends in certain respects the Rights Agreement. All capitalized terms not otherwise defined
herein shall have the meanings ascribed to them in the Rights Agreement. 
 R E C I T A L S 

WHEREAS, the Company and the undersigned parties desire to amend the Rights Agreement to add an additional party to the
Rights Agreement. 
 WHEREAS, Section 4.4 of the Rights Agreement requires written consent of the Company
and the holders of a majority of the Registrable Securities (as defined in the Rights Agreement) then outstanding to amend or waive provisions of the Rights Agreement pursuant to this Amendment. 

WHEREAS, the undersigned parties hold a majority of the currently outstanding Registrable Securities. 

NOW, THEREFORE, in consideration of the foregoing recitals and for other good and valuable consideration, the adequacy
and sufficiency of which are hereby acknowledged, the parties hereto hereby agree as follows: 
 1. Addition
of TriplePoint Capital LLC. Upon its delivery to the Company of an executed signature page to the Rights Agreement, (a) TriplePoint Capital LLC (“TriplePoint”) is hereby added to Rights Agreement as an
“Investor” thereunder (and will thereupon have all the rights and obligations of a “Holder” thereunder other than for purposes of Section 2.2), and (b) the 100,000 shares of Class A Common Stock held by TriplePoint
as of the date of this Amendment (as adjusted for stock splits, stock dividends, recapitalizations or combinations) shall be deemed Registrable Securities under the Rights Agreement. The rights and obligations granted to TriplePoint under the Rights
Agreement, as amended by this Amendment shall not be transferable without the Company’s prior written consent. 
 2. No
Other Changes. Except as expressly amended by this Amendment, all of the terms of the Rights Agreement shall remain in full force and effect. 

 3. General Provisions. 

3.1. Effect of this Amendment. In the event of any inconsistency or conflict between the provisions of the Rights
Agreement and this Amendment, the provisions of this Amendment will prevail and govern. All references to the Rights Agreement or in any exhibit or schedule thereto shall hereinafter refer to the Rights Agreement as amended by this Amendment.

 3.2. Governing Law. This Amendment and all acts and transactions pursuant hereto and the rights and
obligations of the parties hereto shall be governed, construed and interpreted in accordance with the laws of the State of California, without giving effect to principles of conflicts of law. 

3.3. Counterparts. This Agreement may be executed in two or more counterparts, each of which shall be deemed an
original and all of which together shall constitute one instrument. 
 3.4. Entire Agreement. The Rights
Agreement, as amended hereby, together with this Amendment constitute the full and entire understanding and agreement between the parties regarding the subject matter hereof and thereof and supersede and cancel all prior agreements, negotiations,
correspondence, undertakings and communications of the parties, oral or written, respecting such subject matter. 
 [Signature
Pages Follow] 

  
 -2-

 The parties hereto have executed this Amendment as of the date first written
above. 
  

			
	COMPANY:
	
	FACEBOOK, INC.
		
	By:	 	 /s/ Theodore W. Ullyot

		 	 Theodore W. Ullyot, Vice President, General
 Counsel and Secretary

	
	Address:
	1601 Willow Road
	Menlo Park, CA 94025

  
 SIGNATURE
PAGE TO AMENDMENT NO. 1 TO 
 SIXTH AMENDED AND RESTATED INVESTORS’ RIGHTS AGREEMENT 

 The parties hereto have executed this Amendment as of the date first written
above. 
  

			
	INVESTORS:
		
		 	Accel IX L.P.
	 By:
	 	Accel IX Associates L.L.C.
		 	 Its General Partner

		
	 By:
	 	 /s/ Tracy L. Sedlock

		 	Attorney in Fact
		
		 	Accel IX Strategic Partners L.P.
	 By:
	 	Accel IX Associates L.L.C.
		 	Its General Partner
		
	 By:
	 	 /s/ Tracy L. Sedlock

		 	Attorney in Fact
		
		 	Accel Investors 2005 L.L.C.
		
	 By:
	 	 /s/ Tracy L. Sedlock

		 	Attorney in Fact
		
		 	 /s/ James W. Breyer

		 	James W. Breyer, Trustee of James W. Breyer 2005 Trust dated March 25, 2005
		
		 	 /s/ James W. Breyer

		 	James W. Breyer, Trustee of James W. Breyer 2011 Annuity Trust 1, dated March 10, 2011

  
 SIGNATURE
PAGE TO AMENDMENT NO. 1 TO 
 SIXTH AMENDED AND RESTATED INVESTORS’ RIGHTS AGREEMENT 

 The parties hereto have executed this Amendment as of the date first written
above. 
  

			
	INVESTOR
	
	 Rivendell One LLC

		
	By:	 	 /s/ Nathan Linn

	Name:	 	 Nathan Linn

	Title:	 	 Manager

  

  
 SIGNATURE
PAGE TO AMENDMENT NO. 1 TO 
 SIXTH AMENDED AND RESTATED INVESTORS’ RIGHTS AGREEMENT 

 The parties hereto have executed this Amendment as of the date first written
above. 
  

			
	INVESTOR
	
	Mail.ru Group Limited (f/k/a Digital Sky Technologies Limited)
		
	By:	 	 /s/ Matthew Hammond

	Name:	 	 Matthew Hammond

	Title:	 	 Managing Director

  
 SIGNATURE
PAGE TO AMENDMENT NO. 1 TO 
 SIXTH AMENDED AND RESTATED INVESTORS’ RIGHTS AGREEMENT 

 The parties hereto have executed this Amendment as of the date first written above.

  

			
	            INVESTOR
	
	            DST Global Limited
		
	            By:	 	 /s/ Michael Pittakis

	            Name:	 	 Michael Pittakis

	            Title:	 	 Director

	
	            DST USA Limited
		
	            By:	 	 /s/ Sean Hogan

	            Name:	 	 Sean Hogan

	            Title:	 	 Director

	
	            DST USA II Limited
		
	            By:	 	 /s/ Sean Hogan

		 	Its Authorized Signatory
		
		 	 Sean Hogan, Director

		 	Print Name and Title
		
	Address:	 	c/o Tulloch & Co.
		 	 4 Hill Street, London W1J 5NE

United Kingdom

		 	Phone: +44 20 7318 1180
		 	Fax: +44 20 7318 1150

  

  
 SIGNATURE
PAGE TO AMENDMENT NO. 1 TO 
 SIXTH AMENDED AND RESTATED INVESTORS’ RIGHTS AGREEMENT 

 The parties hereto have executed this Amendment as of the date first written above.

  

			
	INVESTOR:
	
	DST Global II, L.P.
		
	By:	 	 /s/ Sean Hogan

		 	Its Authorized Signatory
		
		 	 Sean Hogan, Director

		 	Print Name and Title
		
	Address:	 	c/o Tulloch & Co.
		 	 4 Hill Street, London W1J 5NE

United Kingdom

		 	Phone: +44 20 7318 1180
		 	Fax: +44 20 7318 1150
	
	DST Global III, L.P.
		
	By:	 	 /s/ Sean Hogan

		 	Its Authorized Signatory
		
		 	 Sean Hogan, Director

		 	Print Name and Title
		
	Address:	 	c/o Tulloch & Co.
		 	 4 Hill Street, London W1J 5NE

United Kingdom

		 	Phone: +44 20 7318 1180
		 	Fax: +44 20 7318 1150

  

  
 SIGNATURE
PAGE TO AMENDMENT NO. 1 TO 
 SIXTH AMENDED AND RESTATED INVESTORS’ RIGHTS AGREEMENT 

 The parties hereto have executed this Amendment as of the date first written above.

  

			
	INVESTOR
	
	 GREYLOCK XII LIMITED PARTNERSHIP

		
	By:	 	Greylock XII GP LLC, its General Partner.
		
	By:	 	 /s/ Donald A. Sullivan

		 	Donald A. Sullivan
	Title:	 	Administrative Partner
	
	GREYLOCK XII–A LIMITED PARTNERSHIP
		
	By:	 	Greylock XII GP LLC, its General Partner.
		
	By:	 	 /s/ Donald A. Sullivan

		 	Donald A. Sullivan
	Title:	 	Administrative Partner
	
	GREYLOCK XII PRINCIPALS LLC
	By:	 	Greylock Management Corporation, Sole Member
		
	By:	 	 /s/ Donald A. Sullivan

		 	Donald A. Sullivan
	Title:	 	Vice President and Treasurer

  
 SIGNATURE
PAGE TO AMENDMENT NO. 1 TO 
 SIXTH AMENDED AND RESTATED INVESTORS’ RIGHTS AGREEMENTAmendment No. 1 to Conversion Agreement

 Exhibit 10.16A 
 FACEBOOK INC. 
 AMENDMENT NO. 1 

TO 

CONVERSION AGREEMENT 
 This Amendment No. 1 (this “Amendment”) is made as of April 30, 2012, by and among Facebook, Inc., a Delaware corporation (the “Company”), and
Mail.ru Group Limited (f/k/a Digital Sky Technologies Limited), a limited liability company incorporated under the laws of the British Virgin Islands (“Mail.ru”), DST Global Limited, a limited liability company incorporated
under the laws of the British Virgin Islands (“DSTG”), DST Global II, L.P., a Cayman Islands exempted limited partnership (“DSTG II”), DST Global III, L.P., a Cayman Islands exempted limited
partnership (“DSTG III”), DST USA Limited, a limited liability company incorporated under the laws of the British Virgin Islands (“DST USA”), and DST USA II Limited, a business company organized under
the laws of the British Virgin Islands (“DST USA II”). Capitalized terms used herein but not otherwise defined herein shall have the meanings ascribed thereto in the Conversion Agreement (as defined below). 

RECITALS 
 WHEREAS, the Company, Mail.ru, DSTG, DSTG II, DSTG III, DST USA, and DST USA II are parties to that certain Conversion Agreement, dated as of February 19, 2010 (the “Conversion
Agreement”). 
 WHEREAS, Section 9 of the Conversion Agreement requires written consent of the
Company, Mail.ru, DSTG, DSTG II, DSTG III, DST USA, and DST USA II to amend or waive provisions of the Conversion Agreement pursuant to this Amendment. 
 WHEREAS, the Company, Mail.ru, DSTG, DSTG II, DSTG III, DST USA, and DST USA II desire to amend the Conversion Agreement by making certain agreements as set forth herein. 

NOW, THEREFORE, in consideration of the foregoing recitals and for other good and valuable consideration, the adequacy
and sufficiency of which are hereby acknowledged, the parties hereto hereby agree as follows: 
 1. Amendment
of Section 5 of the Conversion Agreement. Subject to the effectiveness of this Amendment as set forth in Section 2 hereof, Section 5 of the Conversion Agreement is hereby amended and restated in its entirety as follows:

 “Agreement Not to Sell. Reference is made to the Sixth Amended and Restated Investors’
Rights Agreement by and among the Company and the Investors (as defined therein), dated as of December 27, 2010 (the “Rights Agreement”). Notwithstanding the restrictions set forth in Section 2.14(a) of
the Rights Agreement, Mail.ru, DSTG, DSTG II, DSTG III, DST USA, and DST 

 
USA II (and any successors or assigns hereto) hereby agree that in connection with the initial public offering of the Company’s securities (the “Public Offering”)
each of Mail.ru, DSTG, DSTG II, DSTG III, DST USA, and DST USA II and/or any of their respective affiliates, successors or assigns will not, during the period commencing on the date of the final prospectus relating to the Public Offering (the
“Prospectus”) and ending on various dates thereafter as specified below, (1) offer, pledge, sell, contract to sell, sell any option or contract to purchase, purchase any option or contract to sell, grant any option,
right or warrant to purchase, lend, or otherwise transfer or dispose of, directly or indirectly, any shares of Class A Common Stock of the Company (the “Common Stock”) beneficially owned (as such term is used in Rule
13d-3 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”)), by such entity or any other securities so owned convertible into or exercisable or exchangeable for Common Stock or (2) enter into any swap
or other arrangement that transfers to another, in whole or in part, any of the economic consequences of ownership of the Common Stock, whether any such transaction described in clause (1) or (2) above is to be settled by delivery of
Common Stock or such other securities, in cash or otherwise (the transactions described in clauses (1) and (2) are referred to herein as a “Disposition”). For the purposes of this Section 5, “Total
Shares” refers to shares of Common Stock in which such entity has an economic interest, on an as-converted to Common Stock basis but without giving effect to the sale of any shares of Common Stock by such entity pursuant to the
underwriting agreement to be entered into in connection with the Public Offering (the “Underwriting Agreement”) pursuant to clause (a) below or thereafter pursuant to clause (b) below; “Restricted
Period” shall refer to the periods beginning on the date of the Prospectus and expiring upon the dates ending 90, 210 and 365 days after the date of the Prospectus; and “Underwritten Shares” refers to the shares
of Common Stock to be sold by such entity pursuant to the Underwriting Agreement (including any shares of Common Stock to be sold by such entity pursuant to the Underwriters’ over-allotment option). 

The foregoing restrictions shall not apply to: 

 

	 	(a)	 the Underwritten Shares actually sold by such entity; 

 

	 	(b)	 on or after the date that is 91 days after the date of the Prospectus, the Disposition of a number of shares of Common Stock by such entity equal to
the number of Underwritten Shares; 

  

	 	(c)	 on or after the date that is 211 days after the date of the Prospectus, the Disposition by such entity of a number of shares of Common Stock by such
entity equal to the number of Total Shares of such entity minus the number of shares of Common Stock to be released from the restrictions set forth in this Section 5 for the benefit of such entity pursuant to (a) and (b) above
and (d) below; 

  
 - 2 -

	 	(d)	 on or after the date that is 366 days after the date of the Prospectus the Disposition by such entity of the lesser of (i) a number of shares
of Common Stock equal to the number of Total Shares of such entity divided by two or (ii) such number of shares of Common Stock held by such entity that remain subject to the restrictions set forth in this Section 5 after giving effect to
the releases for the benefit of such entity set forth in (a) and (b) above; 

  

	 	(e)	 transactions relating to shares of Common Stock or other securities acquired by such entity in open market transactions after the completion of the
Public Offering, provided that no filing under Section 16(a) of the Exchange Act shall be required or shall be voluntarily made in connection with subsequent sales of Common Stock or other securities acquired in such open market
transactions; 

  

	 	(f)	 transfers by such entity of shares of Common Stock or any security convertible into or exercisable or exchangeable for Common Stock as a bona fide
gift, or gifts; 

  

	 	(g)	 transfers or distributions of shares of Common Stock or any securities convertible into or exercisable or exchangeable for Common Stock by an entity
that is a corporation, partnership or other business entity (A) to another corporation, partnership or other business entity that controls, is controlled by or managed by or is under common control with such entity or (B) as part of a
distribution to an equity holder of such entity or to the estate of any such equity holder; 

  

	 	(h)	 the sale of shares of Common Stock in an underwritten public offering that occurs during any applicable Restricted Period; and

  

	 	(i)	 the establishment of a trading plan pursuant to Rule 10b5-1 under the Exchange Act for the transfer of shares of Common Stock, provided that
such plan does not provide for the transfer of shares of Common Stock that continue to be subject to the restrictions of this Section 5 during any Restricted Period and no public announcement or filing under the Exchange Act regarding the
establishment of a plan relating to such restricted shares shall be required of or voluntarily made by or on behalf of the undersigned or the Company; 

provided that in the case of any transfer or distribution pursuant to clause (f) or (g) above, each
transferee, donee or distributee shall agree to be bound by the provisions of this Section 5 as if a party hereto. 
 For
the sake of clarity, Exhibit A attached hereto sets forth examples of the release of shares of Common Stock from the restrictions set forth in this Section 5 for the benefit of such entity pursuant to clauses (a) –
(d) above.” 

  
 - 3 -

 2. Effective Date of Amendment. This Amendment shall only be
effective (i) as of the date of the Public Offering and (ii) if the per share price to the public for the Common Stock set forth in the Prospectus is equal to or greater than the lower end of the range of the per share price to the public
for the Common Stock set forth in the first widely distributed preliminary prospectus related to the Public Offering; provided, however, that in no event shall this Amendment have any force and effect if the Underwriting Agreement has not been
executed and delivered by September 30, 2012. 
 3. No Other Changes. Except as expressly amended by
this Amendment, all of the terms of the Conversion Agreement shall remain in full force and effect. 
 4.
Effect of this Amendment. In the event of any inconsistency or conflict between the provisions of the Conversion Agreement and this Amendment, the provisions of this Amendment will prevail and govern. All references to the Conversion
Agreement or in any exhibit or schedule thereto shall hereinafter refer to the Conversion Agreement, as amended by this Amendment. 
 5. Entire Agreement. This Amendment together with the Conversion Agreement, Side Letter Agreement, any amendments hereto or thereto and the Saverin Agreement constitute the full and entire
understanding and agreement among the parties regarding the subject matter hereof and thereof and supersede and cancel all prior agreements, negotiations, correspondence, undertakings and communications of the parties, oral or written, respecting
such subject matter. 
 6. Miscellaneous. This Amendment shall be governed, construed and interpreted in
accordance with the laws of the State of California, without giving effect to principles of conflicts of law. The parties (x) irrevocably and unconditionally submit to the jurisdiction of the federal or state courts located in the Northern
District of California for the purpose of any suit, action or other proceeding arising out of or based upon this Amendment, (y) agree not to commence any suit, action or other proceeding arising out of or based upon this Amendment except in the
federal or state courts located in the Northern District of California, and (z) hereby waive, and agree not to assert, by way of motion, as a defense, or otherwise, in any such suit, action or proceeding, any claim that it is not subject
personally to the jurisdiction of the above-named courts, that its property is exempt or immune from attachment or execution, that the suit, action or proceeding is brought in an inconvenient forum, that the venue of the suit, action or proceeding
is improper or that this Amendment or the subject matter hereof may not be enforced in or by such court. This Amendment may be executed in one or more counterparts. 
 [Signature Pages Follow] 

  
 - 4 -

 The parties hereto have executed this Amendment as of the date first written above.

  

			
	COMPANY:
	
	FACEBOOK, INC.
		
	By:	 	 /s/ Theodore W. Ullyot

		 	Theodore W. Ullyot, Vice President, General Counsel & Secretary
	
	 Address:

1601 Willow Road

	Menlo Park, CA 94025

  
 SIGNATURE
PAGE TO AMENDMENT TO CONVERSION AGREEMENT 

 The parties hereto have executed this Amendment as of the date first written above.

  

			
	Mail.ru Group Limited
	(f/k/a Digital Sky Technologies Limited)
		
	By:	 	 /s/ Matthew Hammond

	Name:	 	 Matthew Hammond

	Title:	 	 Managing Director

  
 SIGNATURE
PAGE TO AMENDMENT TO CONVERSION AGREEMENT 

 The parties hereto have executed this Amendment as of the date first written above.

  

			
	DST USA Limited
		
	By:	 	 /s/ Sean Hogan

	Name:	 	Sean Hogan
	Title:	 	Director
	
	DST Global II, L.P.
		
	By:	 	 /s/ Sean Hogan

	Name:	 	Sean Hogan
	Title:	 	Director
	
	DST Global III, L.P.
		
	By:	 	 /s/ Sean Hogan

	Name:	 	Sean Hogan
	Title:	 	Director

  

  
 SIGNATURE
PAGE TO AMENDMENT TO CONVERSION AGREEMENT 

 The parties hereto have executed this Amendment as of the date first written above.

  

			
	DST Global Limited
		
	By:	 	 /s/ Michael Pittakis

	Name:	 	 Michael Pittakis

	Title:	 	 Director

	
	DST USA II Limited
		
	By:	 	 /s/ Brett Armitage

	Name:	 	 Brett Armitage

	Title:	 	 Director

  

  
 SIGNATURE
PAGE TO AMENDMENT TO CONVERSION AGREEMENT 

 EXHIBIT A 
 Sample Release Timeline from Agreement Not to Sell 
 Example No. 1 –
Shareholders permitted to sell 23% of holdings in Public Offering 
  

			
	 Cumulative Percentage of Total Shares

for which Restricted Period has Expired
	 	 No. of Days Since Date of Public

Offering

	23%	 	Underwritten Shares
	46%	 	91 Days
	50%	 	211 Days
	100%	 	366 Days

 Example No. 2 – Shareholders permitted to sell 30% of holdings in Public Offering 

 

			
	 Cumulative Percentage of Total Shares

for which Restricted Period has Expired
	 	 No. of Days Since Date of Public

Offering

	30%	 	Underwritten Shares
	60%	 	91 Days
	60%	 	211 Days
	100%	 	366 Days

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