Calm Seas Acquisition Corp.

Exhibit 10.7 THIS PROMISSORY NOTE (“NOTE”) HAS NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE “SECURITIES ACT”). THIS NOTE HAS BEEN ACQUIRED FOR INVESTMENT ONLY AND MAY NOT BE SOLD, TRANSFERRED OR ASSIGNED IN THE ABSENCE OF REGISTRATION OF THE RESALE THEREOF UNDER THE SECURITIES ACT OR AN OPINION OF COUNSEL REASONABLY SATISFACTORY IN FORM, SCOPE AND SUBSTANCE TO THE COMPANY THAT SUCH REGISTRATION IS NOT REQUIRED. PROMISSORY NOTE Principal Amount: Up to $300,000 D…

S-1 · 2026-09-28 · 0001193125-26-404122

Exhibit 4.1 NUMBER UNITS U-_____________ SEE REVERSE FOR CERTAIN DEFINITIONS CUSIP [•] CALM SEAS ACQUISITION CORP. UNITS CONSISTING OF ONE CLASS A ORDINARY SHARE AND ONE-THIRD OF ONE REDEEMABLE WARRANT, EACH WHOLE WARRANT ENTITLING THE HOLDER TO PURCHASE ONE CLASS A ORDINARY SHARE THIS CERTIFIES THAT _______________ is the owner of ___________ Units of Calm Seas Acquisition Corp., a Cayman Islands exempted company (the “Company”), transferable on the books of the Compa…

S-1 · 2026-09-28 · 0001193125-26-404122

Exhibit 4.2 NUMBER SHARES C- SEE REVERSE FOR CERTAIN DEFINITIONS CUSIP [•] CALM SEAS ACQUISITION CORP. CLASS A ORDINARY SHARES THIS CERTIFIES THAT _______________ is the owner of ___________ fully paid and non-assessable Class A ordinary shares, par value $0.0001 per share (each, a “Class A Ordinary Share”), of Calm Seas Acquisition Corp., a Cayman Islands exempted company (the “Company”), subject to the Company’s amended and restated memorandum and articles of association as the …

S-1 · 2026-09-28 · 0001193125-26-404122

Exhibit 4.3 [Form of Warrant Certificate] [FACE] Number Warrants THIS WARRANT SHALL BE VOID IF NOT EXERCISED PRIOR TO THE EXPIRATION OF THE EXERCISE PERIOD PROVIDED FOR IN THE WARRANT AGREEMENT DESCRIBED BELOW CALM SEAS ACQUISITION CORP. Incorporated Under the Laws of the Cayman Islands CUSIP [•] Warrant Certificate This Warrant Certificate certifies that, or registered assigns, is the registered holder of warrants evidenced hereby (the “Warrants” and each, a “Warrant”) to purchase C…

S-1 · 2026-09-28 · 0001193125-26-404122

Exhibit 4.4 WARRANT AGREEMENT THIS WARRANT AGREEMENT (this “Agreement”), dated as of [•], 2026, is by and between Calm Seas Acquisition Corp., a Cayman Islands exempted company (the “Company”), and Continental Stock Transfer & Trust Company, a New York corporation, as warrant agent (in such capacity, the “Warrant Agent,” and also referred to herein as the “Transfer Agent”). WHEREAS, the Company is engaged in an initial public offering (the “Offering”) of units of the Company’s equity securiti…

S-1 · 2026-09-28 · 0001193125-26-404122