Every 424B that Rubico Inc. (RUBI) has filed with the SEC in the last 12 months is listed below, newest first, and each one links through to the document itself with the summary and the scores our analysis gives it.
A 424B covers the supplement that carries the terms of a priced offering, so if you follow RUBI and want that one kind of document rather than the whole filing history, this is the page to keep. The company's other filings, of every form, are on the full RUBI filings page.
Rubico Inc. filed a prospectus supplement to its F‑1, covering 12,315,270 Units (each Unit consisting of one common share or one pre‑funded warrant and one Class A warrant) and 615,763 Representative Warrants, and also registering up to 12,315,270 common shares underlying the pre‑funded warrants, up to 49,261,080 common shares underlying the Class A warrants, and up to 2,463,052 common shares underlying the Representative Warrants.
The supplement attaches a Form 6‑K. As of November 13, 2025, Rubico had 40,827,280 common shares outstanding, which included shares issued upon exercises of Class A warrants and Representative Warrants from the recent public offering. If all remaining Class A warrants are exercised on a zero cash basis after the second warrant reset date on November 18, 2025, an additional 15,674,560 common shares would be issued. If all remaining Representative Warrants are exercised on a zero cash basis after that date, an additional 1,863,052 common shares would be issued.
Rubico Inc. filed Prospectus Supplement No. 3 under Rule 424(b)(3), updating its F-1 prospectus to cover the resale of 75,000 common shares offered by the selling shareholders. The supplement incorporates information from a Form 6-K furnished on November 14, 2025.
As of November 13, 2025, Rubico had 40,827,280 common shares issued and outstanding; this is a baseline figure, not the amount being offered. The Form 6-K notes that, if all remaining Class A Warrants are exercised on a zero cash basis after the second warrant reset date on November 18, 2025, there will be 15,674,560 additional common shares issued and outstanding. If all remaining Representative Warrants are exercised on a zero cash basis after the same date, there will be an additional 1,863,052 common shares issued and outstanding.
Rubico Inc. filed a Prospectus Supplement to its Form F-1 covering up to 15,000,000 common shares. The supplement incorporates the company’s Form 6-K furnished on November 14, 2025.
As of November 13, 2025, Rubico had 40,827,280 common shares issued and outstanding, reflecting issuances from recent warrant exercises tied to its public offering. After the second warrant reset date on November 18, 2025, if all remaining Class A Warrants are exercised on a zero cash basis, 15,674,560 additional common shares would be issued. If all remaining Representative Warrants are exercised on a zero cash basis after the same date, a further 1,863,052 common shares would be issued.
Rubico Inc. filed a prospectus supplement for the resale of 75,000 common shares by selling shareholders, to be used with its September 19, 2025 prospectus.
Separately, on November 6, 2025, Rubico closed an underwritten public offering of 12,315,270 units at $0.609 per unit, each unit including one common share and a one-year Class A warrant. Gross proceeds were approximately $7.5 million before fees. The underwriters received a 45‑day over-allotment option, and 1,847,290 Warrants were purchased under that option. Representative Warrants equal to 5.0% of shares sold (615,763) were issued.
Rubico reported 17,612,636 common shares outstanding as of November 6, 2025. The Warrants are immediately exercisable, include reset prices to $0.4263 on the 4th trading day and $0.3045 on the 8th trading day with proportional share increases, and permit a zero cash exercise. If all outstanding Warrants and Representative Warrants were exercised on a zero cash basis after the second reset, a maximum of 59,113,292 additional shares could be issued. The company highlights potential substantial dilution and volatility, including Nasdaq listing risks.
Rubico Inc. filed a Prospectus Supplement covering up to 15,000,000 Common Shares, updating investors with details from a recent offering and new risk disclosures. On November 6, 2025, the company closed an underwritten public offering of 12,315,270 units at $0.609 per unit, each unit including one common share and one one‑year Class A Warrant. Gross proceeds were approximately $7.5 million before fees and expenses.
The underwriters received a 45‑day option for up to 1,847,290 additional common shares and/or warrants, and partially exercised the option for 1,847,290 warrants. Representative Warrants equal to 5.0% of shares sold (615,763 shares) were issued. Following closing, 17,612,636 common shares were outstanding as of November 6, 2025. Warrants are immediately exercisable with reset prices to $0.4263 (4th trading day) and $0.3045 (8th trading day), and include a zero cash exercise option that can increase share issuance. If all outstanding investor and Representative Warrants are exercised on a zero cash basis after the second reset date, a maximum of 59,113,292 additional shares could be issued. The company also warned of potential share price volatility and possible Nasdaq actions due to the highly dilutive warrant structure.
Rubico Inc. launched a firm-commitment underwritten public offering of 12,315,270 Units at $0.609 per Unit. Each Unit includes one Common Share (or a Pre‑funded Warrant in lieu of a share, subject to 4.99%/9.99% beneficial ownership caps) and one Class A Warrant.
The Warrants are immediately exercisable, carry a one‑year term, feature reset prices to $0.4263 on the 4th trading day and $0.3045 on the 8th, and permit a zero cash exercise that can deliver twice the shares of a cash exercise; the company states it does not expect to receive funds upon Warrant exercise. Net proceeds are estimated at ~$6.8 million (~$7.8 million with full over‑allotment). An over‑allotment option covers up to 1,847,290 additional Common Shares and/or Warrants.
Common Shares outstanding would be 17,612,636 after the offering (no Pre‑funded Warrants sold and no exercises). The Lax Trust holds Series D Preferred Shares representing 97.0% of total voting power; together with related holders, aggregate voting power may be 98.6%. The prospectus highlights risks, including potential Nasdaq trading halts or delisting.