Sec Form 4 Filing - O'Connor Courtenay @ Squarespace, Inc. - 2024-10-17

FORM 4 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 O'Connor Courtenay 2. Issuer Name and Ticker or Trading Symbol Squarespace, Inc. [ SQSP] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner X __ Officer (give title below) _____ Other (specify below) General Counsel and Secretary (Last) (First) (Middle) C/O SQUARESPACE, INC.,, 225 VARICK ST, 12TH FLOOR 3. Date of Earliest Transaction (MM/DD/YY) 10/17/2024 (Street) NEW YORK, NY10014 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

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 Restricted Stock Units $ 0 10/17/2024 D 108,189 ( 1 ) ( 1 ) Class A Common Stock 108,189 ( 1 ) 0 D Performance Restricted Stock Units $ 0 10/17/2024 D 72,260 ( 2 ) ( 2 ) Class A Common Stock 72,260 ( 2 ) 0 D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other O'Connor Courtenay C/O SQUARESPACE, INC., 225 VARICK ST, 12TH FLOOR NEW YORK, NY10014 General Counsel and Secretary Signatures /s/ Jessica Krasner, as Attorney-in-Fact 10/17/2024 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Pursuant to the Amended and Restated Agreement and Plan of Merger (the "Merger Agreement"), dated as of September 9, 2024, by and among the Issuer, Spaceship Purchaser, Inc. ("Parent") and Spaceship Group MergerCo Inc., a wholly owned subsidiary of Parent, immediately prior to the effective time of the Merger (as defined in the Merger Agreement), each Issuer restricted stock unit ("RSU") award held by an employee of the Issuer then outstanding and not vested was cancelled and converted into the opportunity to be paid an amount in cash ("Parent RSU Cash Award") equal to the product of (i) $46.50 per share, without interest (the "Per Share Price") multiplied by (ii) the number of shares of Class A Common Stock of the Issuer subject to such RSU award. Each Parent RSU Cash Award remains subject to the same vesting terms and conditions that applied to the associated Issuer RSU award immediately prior to the effective time of the Merger. ( 2 )Pursuant to the Merger Agreement, immediately prior to the effective time of the Merger, each Issuer performance restricted stock unit ("PSU") award held by an employee of the Issuer then outstanding and not vested was cancelled and converted into the opportunity to be paid an amount in cash ("Parent PSU Cash Award") equal to the product of (i) the Per Share Price multiplied by (ii) the number of shares of Class A Common Stock subject to such PSU award (with the number of shares of Class A Common Stock subject to Issuer PSU awards determined in accordance with the applicable award agreement prior to the consummation of the Merger). Each Parent PSU Cash Award remains subject to the same vesting terms and conditions that applied to the associated Issuer PSU award immediately prior to the effective time of the Merger.

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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