Sec Form 4 Filing - COLUMBUS CIRCLE 1 SPONSOR Corp LLC @ Columbus Circle Capital Corp. I - 2025-12-03

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 COLUMBUS CIRCLE 1 SPONSOR Corp LLC 2. Issuer Name and Ticker or Trading Symbol Columbus Circle Capital Corp. I [ BRR] 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) 3 COLUMBUS CIRCLE, 24TH FLOOR 3. Date of Earliest Transaction (MM/DD/YY) 12/03/2025 (Street) NEW YORK, NY10019 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 ordinary shares 12/03/2025 J( 1 ) 265,000 ( 1 ) D $ 0 0 ( 1 ) D ( 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 Class B ordinary shares ( 1 ) 12/03/2025 J( 1 ) 8,245,833 ( 1 ) ( 2 ) Class A ordinary shares 8,245,833 $ 0 87,500 D ( 1 )

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other COLUMBUS CIRCLE 1 SPONSOR Corp LLC 3 COLUMBUS CIRCLE 24TH FLOOR NEW YORK, NY10019 X Signatures /s/ Cohen & Company, LLC, as managing member of Columbus Circle 1 Sponsor Corp LLC by Dennis Crilly, an authorized signatory 12/09/2025 Signature of Reporting Person Date

Explanation of Responses:

( 1 )On December 3, 2025, Columbus Circle 1 Sponsor Corp (the "Sponsor") distributed (i) 8,245,833 of its Class B ordinary shares (the "Class B Ordinary Shares"), par value $0.0001 per share, of Columbus Circle Capital Corp I (the "Issuer") and (ii) all of its 265,000 private placement units (the "Private Placement Units"), each Private Placement Unit consisting of one Class A ordinary share, par value $0.0001 per share, of the Issuer (the "Class A Ordinary Shares") and one-half of one warrant (with each whole warrant exercisable for one Class A Ordinary Share at an exercise price of $11.50 per share) to its members and members of Columbus Circle 1E Sponsor Corporation LLC ("Columbus Circle 1E"), a member of the Sponsor, for no consideration (the "Sponsor Distribution"). ( 2 )The Class B ordinary shares have no expiration date, will automatically convert into Class A ordinary shares upon the closing of the Issuer's initial business combination and are subject to certain time and price vesting conditions pursuant to the Sponsor Letter Agreement, effective as of December 3, 2025, by and between the Sponsor and ProCap Financial, Inc.

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).

** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

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