Adage Capital Management, L.P., along with managing members Robert Atchinson and Phillip Gross, filed a Schedule 13G with the SEC on November 12, 2026, disclosing a 5.34% beneficial ownership position in Avidbank Holdings, Inc. as of September 30, 2026.

Key Highlights

  • Aggregate beneficial ownership: Each reporting person beneficially owns 587,045 shares of Avidbank Holdings common stock, no par value per share.
  • Ownership percentage: The 587,045 shares represent 5.34% of the class, calculated against 10,983,480 shares outstanding as of July 31, 2026.
  • No sole voting or dispositive power: All 587,045 shares are held with shared voting power and shared dispositive power; sole voting and sole dispositive power are each reported as 0.
  • Three reporting persons: Adage Capital Management, L.P. (investment manager), Robert Atchinson, and Phillip Gross are the reporting persons, all sharing the same share count and percentage.
  • Triggering date: The event requiring the filing occurred on September 30, 2026, according to the filing.
  • Shares held through Adage Capital Partners, L.P.: The common stock is directly held by Adage Capital Partners, L.P., a Delaware limited partnership, with Adage Capital Management, L.P. acting as its investment manager.

Adage Capital Management Crosses 5% Threshold in Avidbank Holdings Common Stock

According to the Schedule 13G filed on November 12, 2026, Adage Capital Management, L.P. ("ACM"), a Delaware limited partnership, reported beneficial ownership of 587,045 shares of Avidbank Holdings, Inc. common stock, no par value per share (CUSIP 05368J103). The filing identifies the issuer as a California bank holding company with principal offices at 1732 North First Street, 6th Floor, San Jose, CA 95112. The percentage of class, 5.34%, was calculated using a share count of 10,983,480 shares outstanding as of July 31, 2026, as reported in the company's Form 10-Q for the quarterly period ended June 30, 2026, filed with the SEC on August 12, 2026.

The filing names two additional reporting persons: Robert Atchinson and Phillip Gross, both United States citizens and managing members of entities within the Adage Capital structure. Mr. Atchinson serves as managing member of Adage Capital Advisors, L.L.C. and Adage Capital Partners, L.L.C., while Mr. Gross holds equivalent managing member roles. Both individuals report the identical beneficial ownership figure of 587,045 shares at 5.34% of the class, all on a shared basis with zero sole voting or dispositive power. The business address for all reporting persons is listed as 200 Clarendon Street, 52nd Floor, Boston, Massachusetts 02116.

The filing states that "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." The filing further notes that it "should not be construed in and of itself as an admission by any Reporting Person as to beneficial ownership of the securities reported herein."

What Was Disclosed

Adage Capital Management, L.P., Robert Atchinson, and Phillip Gross jointly filed a Schedule 13G disclosing shared beneficial ownership of 587,045 shares of Avidbank Holdings, Inc. common stock, equal to 5.34% of the class, triggered by an event on September 30, 2026.