Sec Form 3 Filing - ACM ASOF VIII Secondary-C LP @ Rubicon Technologies, Inc. - 2022-08-09

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 ACM ASOF VIII Secondary-C LP 2. Issuer Name and Ticker or Trading Symbol Rubicon Technologies, Inc. [ RBT] 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) ONE ROCKEFELLER PLAZA, 32ND FLOOR 3. Date of Earliest Transaction (MM/DD/YY) 08/09/2022 (Street) NEW YORK, NY10020 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) __ X __ Form filed by One Reporting Person _____ 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 Class A common stock 3,186,094( 1 ) D

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

< td style="text-align: center;"> Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other ACM ASOF VIII Secondary-C LP ONE ROCKEFELLER PLAZA, 32ND FLOOR NEW YORK, NY10020 X Signatures ACM ASOF VIII Secondary-C LP By: Atalaya Capital Management LP, its investment manager By: /s/ Drew Phillips, Authorized Signatory 08/23/2022 Signature of Reporting Person Date

Explanation of Responses:

( 1 )On August 8, 2022, prior to the Issuer's business combination, ACM ASOF VIII Secondary-C LP ("ASOF") acquired 2,880,669 shares of Class A ordinary shares, par value $0.0001 per share, of Founder SPAC (the "Founder Shares"). On August 9, 2022, ASOF acquired an additional 305,425 Founder Shares. On August 15, 2022, the Issuer and Founder SPAC consummated a business combination whereby Founder SPAC was renamed Rubicon Technologies, Inc. and the Founder Shares were converted on a one-to-one basis into shares of Class A common stock, par value $0.0001 per share, of the Issuer.

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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