Sec Form 3 Filing - NBVM GP, LLC @ Markforged Holding Corp - 2021-07-14

FORM 3 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person NBVM GP, LLC 2. Issuer Name and Ticker or Trading Symbol Markforged Holding Corp [ MKFG] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director X __ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) 60 WILLIAM STREET, SUITE 350 3. Date of Earliest Transaction (MM/DD/YY) 07/14/2021 (Street) WELLESLEY, MA02481 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) _____ Form filed by One Reporting Person __ X __ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Stock 29,126,742 I By North Bridge Venture Partners 7, L.P. ( 1 )

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities) 1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5) 6. Date Exercisable and Expiration Date (MM/DD/YY) 7. Title and Amount of Underlying Securities (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4) Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares Earnout Shares $ 0 ( 2 )( 3 ) 07/14/2026 Common Stock 2,633,246 I By North Bridge Venture Partners 7, L.P. ( 1 )

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other NBVM GP, LLC 60 WILLIAM STREET, SUITE 350 WELLESLEY, MA02481 X DAMORE RICHARD A 60 WILLIAM STREET, SUITE 350 WELLESLEY, MA02481 X North Bridge Venture Partners 7, L.P. 60 WILLIAM STREET, SUITE 350 WELLESLEY, MA02481 X North Bridge Venture Management 7, L.P. 60 WILLIAM STREET, SUITE 350 WELLESLEY, MA02481 X Signatures North Bridge Venture Partners 7, L.P., /s/ Edward T. Anderson, Manager of NBVM GP, general partner of North Bridge Venture Management 7, L.P., general partner of North Bridge Venture Partners 7, L.P. 07/14/2021 Signature of Reporting Person Date North Bridge Venture Management 7, L.P., /s/ Edward T. Anderson, Manager of NBVM GP, general partner of North Bridge Venture Management V, L.P. 07/14/2021 Signature of Reporting Person Date NBVM GP LLC, /s/ Edward T. Anderson, Manager of NBVM GP 07/14/2021 Signature of Reporting Person Date /s/ Richard A. D'Amore 07/14/2021 Signature of Reporting Person Date

Explanation of Responses:

( 1 )The reportable securities are owned directly by North Bridge Venture Partners 7, L.P. ("NBVP 7 LP"). North Bridge Venture Management 7, L.P. ("NBVM 7") is the sole general partner of NBVP 7 L.P. NBVM GP, LLC ("NBVM GP") is the sole general partner of NBVM 7. Each of Edward T. Anderson, a member of the Issuer's board of directors post-closing of the Business Combination (as defined in footnote 2 below), and Richard A. D'Amore are the managers of NVBM GP (collectively, the "Managers"). Each of NBVM 7, NBVM GP and the Managers may be deemed to have shared voting and dispositive power over the shares held by NBVP 7 LP. Each of NBVM 7, NBVM GP and the Managers disclaims beneficial ownership of such shares and this report shall not be deemed an admission that any one of them is the beneficial owner of such shares for purposes of Section 16 or any other purpose, except to the extent of their respective pecuniary interests therein, if any. ( 2 )On July 14, 2021 (the "Closing Date") one, the Issuer's predecessor, consummated the business combination (the "Business Combination") pursuant to the terms of the merger agreement dated as of February 23, 2021 by and among one, Caspian Merger Sub Inc., a Delaware corporation and MarkForged, Inc., a Delaware corporation. ( 3 )Immediately prior to the effective time of the Business Combination on the Closing Date, NBVP 7 LP received the right to acquire 2,633,246 shares of the Issuer's Common Stock in connection with the Business Combination, (i) 1,436,316 of which will be released from escrow if the volume-weighted average price ("VWAP") of the Issuer for any 20 trading days in a consecutive 30-trading day period following the Closing Date is at least $12.50; and (ii) 1,196,930 of which will be released from escrow if the VWAP for any 20 trading days in a consecutive 30-day trading period following the Closing Date is at least $15.00. Upon a change of control or liquidation of the Issuer all such previously unearned shares will be issued. Any shares not eligible to be released within five years of the Closing Date will be forfeited and canceled.

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