Sec Form 3 Filing - RPB VENTURES LLC @ GreenLight Biosciences Holdings, PBC - 2023-05-29

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 RPB VENTURES LLC 2. Issuer Name and Ticker or Trading Symbol GreenLight Biosciences Holdings, PBC [ GRNA] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner _____ Officer (give title below) X __ Other (specify below) Member of 10% owner group (Last) (First) (Middle) SHIRLEY & CHARLOTTE ST., P.O. BOX N-1175, BAHAMAS FINANCIAL CENTRE, 2ND FLOOR 3. Date of Earliest Transaction (MM/DD/YY) 05/29/2023 (Street) NASSAU, BAHAMAS, C5 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 300,000 D ( 1 ) ( 2 )

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

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other RPB VENTURES LLC SHIRLEY & CHARLOTTE ST., P.O. BOX N-1175 BAHAMAS FINANCIAL CENTRE, 2ND FLOOR NASSAU, BAHAMAS, C5 Member of 10% owner group LTS INVESTMENTS FUND LP SHIRLEY & CHARLOTTE ST., P.O. BOX N-1175 BAHAMAS FINANCIAL CENTRE, 2ND FLOOR NASSAU, BAHAMAS, C5 Member of 10% owner group LTS INVESTMENTS GP LTD. SHIRLEY & CHARLOTTE ST., P.O. BOX N-1175 BAHAMAS FINANCIAL CENTRE, 2ND FLOOR NASSAU, BAHAMAS, C5 Member of 10% owner group Signatures /s/ Ruth Beneby, Director, RPB Ventures, LLC 07/21/2023 Signature of Reporting Person Date /s/ Ruth Beneby, Director, LTS Investments Fund LP 07/21/2023 Signature of Reporting Person Date /s/ Ruth Beneby, Director, LTS Investments GP Ltd. 07/21/2023 Signature of Reporting Person Date

Explanation of Responses:

( 1 )LTS Investments GP Ltd. is the general partner of LTS Investments Fund LP. RPB Ventures, LLC is a wholly owned subsidiary of LTS Investments Fund LP. By virtue of the foregoing, LTS Investments GP Ltd. and LTS Investments Fund LP may be deemed to beneficially own the shares of common stock directly owned by RPB Ventures, LLC. ( 2 )The filing of this Form 3 shall not be deemed an admission that the Reporting Persons are, for purposes of Section 16 of the Exchange Act or otherwise, the beneficial owners of any securities reported herein. Each of the Reporting Persons specifically disclaims beneficial ownership of the securities reported herein except to the extent of its pecuniary interest therein, if any.

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).

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