UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2025 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 001-42653 COLUMBUS CIRCLE CAPITAL CORP I (Exact name of registrant as specified in its charter) | Cayman Islands | 99-3947168 | ...

Financial Performance - The company incurred a net loss of $87,410 for the three months ended June 30, 2025, with operating costs of $891,633 and share-based compensation expense of $395,400, offset by interest income of $1,199,623[140]. - For the six months ended June 30, 2025, the company reported a net loss of $114,382, consisting of operating costs of $918,605 and share-based compensation expense of $395,400, with interest income of $1,199,623[141]. - The company does not expect to generate operating revenues until after the completion of its Business Combination[139]. - There is substantial doubt about the company's ability to continue as a going concern for the next twelve months due to liquidity concerns[151]. Initial Public Offering - The company completed its Initial Public Offering on May 19, 2025, raising gross proceeds of $250,000,000 from the sale of 25,000,000 units at $10.00 per unit[144]. - The company has incurred $5,456,417 in costs related to the Initial Public Offering, including $4,400,000 in cash underwriting fees[145]. - The underwriters received a cash underwriting discount of 2.00% of the gross proceeds from the Initial Public Offering, totaling $4,400,000[156]. Business Combination - The Business Combination Agreement involves a merger with ProCap BTC, with the company expected to become a wholly-owned subsidiary of Pubco upon completion[130]. - The company intends to complete its initial business combination before the end of the Completion Window, but there is no assurance it will succeed[152]. - The company will pay advisors a cash fee of $9,800,000 upon the consummation of the initial Business Combination[157]. Capital and Financing - The company plans to utilize proceeds from the Convertible Note Financing, amounting to approximately $235 million, for acquiring additional bitcoin for working capital purposes[133]. - Preferred Equity Investors subscribed to purchase non-voting preferred units of ProCap BTC for an aggregate amount of approximately $516.5 million[133]. - The company has incurred significant costs related to its acquisition plans and may need to raise additional capital through loans or investments[151]. Assets and Liabilities - As of June 30, 2025, the company had marketable securities in the Trust Account totaling $251,199,623, including approximately $1,199,623 of interest income[148]. - As of June 30, 2025, the company had cash of $1,003,946 outside the Trust Account, intended for identifying and evaluating target businesses[149]. - The company has no long-term debt or capital lease obligations, aside from specified contractual obligations[154]. - The company has no off-balance sheet arrangements as of June 30, 2025, and does not participate in transactions with unconsolidated entities[153]. Accounting and Compliance - The company accounts for ordinary shares subject to possible redemption as temporary equity, reflecting certain redemption rights[159]. - The company does not believe that recently issued accounting standards will have a material effect on its condensed financial statements[162]. - The company will reimburse an affiliate of its Sponsor $10,000 per month for administrative services until the completion of the Business Combination[155].