SCHEDULE: Adage Capital Management Discloses Iris Acquisition Stake

Adage Capital Management, L.P., along with individuals Robert Atchinson and Phillip Gross, has filed a Schedule 13G, reporting beneficial ownership of 7.81% of Iris Acquisition Corp II's Class A ordinary shares.

Summary

• Adage Capital Management, L.P. (ACM), through its general partner Adage Capital Partners, L.P. (ACP), and its investment manager Adage Capital Partners, L.L.C. (ACMLLC), has reported beneficial ownership of Iris Acquisition Corp II's Class A ordinary shares.
• Robert Atchinson and Phillip Gross, both individually and in their capacities related to ACM's management, are also reporting beneficial ownership.
• The total beneficial ownership reported is 1,350,000 Class A ordinary shares, representing 7.81% of the outstanding shares.
• This ownership is based on the Company's Annual Report on Form 10-K for the year ended December 31, 2025, which stated 17,288,000 Class A Ordinary Shares outstanding as of March 26, 2026.
• The filing is made under Schedule 13G, indicating that the reporting persons are not acting as a group and that the securities were acquired in the ordinary course of business and not for the purpose of influencing control of the issuer.

Sentiment

Score: 5

Explanation: StockSavvy.ai views this as a neutral filing. It's a routine disclosure of beneficial ownership by an investment firm, providing transparency without immediate positive or negative implications for the company's operations or stock price.

Positives

• Adage Capital Management, L.P. has publicly disclosed its significant stake in Iris Acquisition Corp II, providing transparency to the market.
• The reporting persons certify that the shares were acquired in the ordinary course of business, suggesting a standard investment strategy rather than a hostile takeover attempt.

Risks

• While the filing states the shares were not acquired for the purpose of influencing control, any significant shift in ownership by large institutional investors can create market speculation and potential volatility.
• The filing does not provide details on the investment strategy or future intentions regarding the stake, leaving room for uncertainty about potential future actions by Adage Capital Management.

Future Outlook

The filing does not contain specific forward-looking statements or guidance from Iris Acquisition Corp II. The statements made by the reporting persons are certifications regarding their acquisition and holding of securities in the ordinary course of business.

Management Comments

• "The undersigned acknowledge and agree that the foregoing statement on Schedule 13G is filed on behalf of each of the undersigned and that all subsequent amendments to this statement on Schedule 13G shall be filed on behalf of each of the undersigned without the necessity of filing additional joint acquisition statements."
• "The undersigned acknowledge that each shall be responsible for the timely filing of such amendments, and for the completeness and accuracy of the information concerning him or it contained therein, but shall not be responsible for the completeness and accuracy of the information concerning the others, except to the extent that he or it knows or has reason to believe that such information is inaccurate."
• "By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under ?? 240.14a-11."

Industry Context

StockSavvy.ai notes that Schedule 13G filings are common for institutional investors accumulating significant stakes in publicly traded companies, particularly special purpose acquisition companies (SPACs) like Iris Acquisition Corp II. This filing indicates Adage Capital Management's strategic interest in the company.

Stakeholder Impact

• Shareholders: Increased transparency regarding significant ownership may influence investor sentiment and trading activity. The filing confirms a substantial institutional investor's interest.
• Management of Iris Acquisition Corp II: Awareness of Adage Capital Management's stake may inform strategic discussions and future interactions with the investor.

Next Steps

• Adage Capital Management, L.P., Robert Atchinson, and Phillip Gross will be responsible for filing any subsequent amendments to this Schedule 13G statement.

Key Dates

Keywords

Schedule 13G, Iris Acquisition Corp II, Adage Capital Management, Robert Atchinson, Phillip Gross, Class A ordinary shares, beneficial ownership, SEC filing, investment manager