0001943421 2026-07-10 2026-07-10 0001943421 1 2026-07-10 2026-07-10 0001943421 2 2026-07-10 2026-07-10 0001943421 3 2026-07-10 2026-07-10 0001943421 4 2026-07-10 2026-07-10 0001943421 5 2026-07-10 2026-07-10 0001943421 6 2026-07-10 2026-07-10 0001943421 7 2026-07-10 2026-07-10 0001943421 8 2026-07-10 2026-07-10 0001943421 9 2026-07-10 2026-07-10 0001943421 10 2026-07-10 2026-07-10 0001943421 11 2026-07-10 2026-07-10 iso4217:USD shares F-3 F-3/A EX-FILING FEES 333-297207 0001943421 Rubico Inc. N/A N/A F-3 Rubico Inc. Equity Common Shares, par value $0.01 per Share true Equity Preferred Stock, par value $0.01 per Share true Other Preferred Stock Purchase Rights true Debt Debt Securities true Other Warrants true Other Purchase Contracts true Other Rights true Other Depositary Shares true Other Units true true Unallocated (Universal) Shelf true 200000000.00 27620.00 true Equity Common Shares, par value $0.01 per Share true 631575 3751555.50 518.09 203751555.50 28138.09 28138.09 0.00 0.00 (i) There are being registered hereunder such indeterminate number of the securities of each identified class being registered as may be sold from time to time at indeterminate prices, with an initial aggregate public offering price not to exceed $200,000,000. Separate consideration may or may not be received for securities that are issuable on exercise, conversion or exchange of other securities or that are issued in units or represented by depositary shares. To the extent that separate consideration is received for any such securities, the aggregate amount of such consideration will be included in the aggregate offering price of all securities sold. If any debt securities are issued at an original issue discount, then the offering may be in such greater principal amount as shall result in a maximum aggregate offering price not to exceed $200,000,000, less the aggregate dollar amount of all securities previously issued hereunder. Any securities registered hereunder may be sold separately or as part of units, which may consist of any combination of the securities registered hereunder. Preferred Stock Purchase Rights are not currently separable from the Common Shares and are not currently exercisable. The value attributable to the Preferred Stock Purchase Rights, if any, will be reflected in the market price of the Common Shares. (ii) Pursuant to General Instruction I.C of Form F-3, the table does not specify by each class information as to the proposed maximum aggregate offering price. Estimated solely for the purpose of calculating the registration fee pursuant to Rule 457(c) under the Securities Act of 1933, as amended, based on the average of the $6.66 (high) and $5.22 (low) prices of the Shares on Nasdaq on June 29, 2026.