8-K filed May 21, 2025 23:59 UTC CIK 0001962918

m_and_a confidence high sentiment neutral materiality 1.00

ACELYRIN completes merger with Alumis, becomes wholly owned subsidiary; stock to be delisted

ACELYRIN, Inc.

Merger effective May 21, 2025; each SLRN share converted into 0.4814 shares of Alumis common stock.
ACELYRIN requests Nasdaq delisting and intends to deregister shares under Exchange Act.
All ACELYRIN directors and executive officers resigned; replaced by Merger Sub's directors and officers.
Certificate of incorporation and bylaws amended and restated to those of Merger Sub.
Outstanding equity awards converted to Alumis awards; options with exercise price >$18.00 cancelled.

item 1.02item 2.01item 3.01item 5.01item 5.02item 5.03item 3.03item 9.01

Executive movements

Machine-extracted from this filing. Every card cites the SEC source. See all recent executive movements.

Departed

Henry O. Gosebruch

Director

ACELYRIN, Inc.

Effective: 2025-05-21
Filed: May 21, 2025 23:59 UTC

each of Alan Colowick, M.D., M.P.H., Patrick Machado, J.D., Beth Seidenberg, M.D., Bruce C. Cozadd, Dan Becker, M.D., Ph.D., Dawn Svoronos, Lynn Tetrault, J.D., Mina Kim and Henry O. Gosebruch ceased serving as a member of the board of directors of ACELYRIN and each committee thereof.

Departed

Bruce C. Cozadd

Director

ACELYRIN, Inc.

Effective: 2025-05-21
Filed: May 21, 2025 23:59 UTC

each of Alan Colowick, M.D., M.P.H., Patrick Machado, J.D., Beth Seidenberg, M.D., Bruce C. Cozadd, Dan Becker, M.D., Ph.D., Dawn Svoronos, Lynn Tetrault, J.D., Mina Kim and Henry O. Gosebruch ceased serving as a member of the board of directors of ACELYRIN and each committee thereof.

Departed

Patrick Machado, J.D.

Director

ACELYRIN, Inc.

Effective: 2025-05-21
Filed: May 21, 2025 23:59 UTC

each of Alan Colowick, M.D., M.P.H., Patrick Machado, J.D., Beth Seidenberg, M.D., Bruce C. Cozadd, Dan Becker, M.D., Ph.D., Dawn Svoronos, Lynn Tetrault, J.D., Mina Kim and Henry O. Gosebruch ceased serving as a member of the board of directors of ACELYRIN and each committee thereof.

Departed

Dan Becker, M.D., Ph.D.

Director

ACELYRIN, Inc.

Effective: 2025-05-21
Filed: May 21, 2025 23:59 UTC

each of Alan Colowick, M.D., M.P.H., Patrick Machado, J.D., Beth Seidenberg, M.D., Bruce C. Cozadd, Dan Becker, M.D., Ph.D., Dawn Svoronos, Lynn Tetrault, J.D., Mina Kim and Henry O. Gosebruch ceased serving as a member of the board of directors of ACELYRIN and each committee thereof.

Departed

Lynn Tetrault, J.D.

Director

ACELYRIN, Inc.

Effective: 2025-05-21
Filed: May 21, 2025 23:59 UTC

each of Alan Colowick, M.D., M.P.H., Patrick Machado, J.D., Beth Seidenberg, M.D., Bruce C. Cozadd, Dan Becker, M.D., Ph.D., Dawn Svoronos, Lynn Tetrault, J.D., Mina Kim and Henry O. Gosebruch ceased serving as a member of the board of directors of ACELYRIN and each committee thereof.

Departed

Beth Seidenberg, M.D.

Director

ACELYRIN, Inc.

Effective: 2025-05-21
Filed: May 21, 2025 23:59 UTC

each of Alan Colowick, M.D., M.P.H., Patrick Machado, J.D., Beth Seidenberg, M.D., Bruce C. Cozadd, Dan Becker, M.D., Ph.D., Dawn Svoronos, Lynn Tetrault, J.D., Mina Kim and Henry O. Gosebruch ceased serving as a member of the board of directors of ACELYRIN and each committee thereof.

Departed

Alan Colowick, M.D., M.P.H.

Director

ACELYRIN, Inc.

Effective: 2025-05-21
Filed: May 21, 2025 23:59 UTC

each of Alan Colowick, M.D., M.P.H., Patrick Machado, J.D., Beth Seidenberg, M.D., Bruce C. Cozadd, Dan Becker, M.D., Ph.D., Dawn Svoronos, Lynn Tetrault, J.D., Mina Kim and Henry O. Gosebruch ceased serving as a member of the board of directors of ACELYRIN and each committee thereof.

Departed

Mina Kim

Director

ACELYRIN, Inc.

Effective: 2025-05-21
Filed: May 21, 2025 23:59 UTC

each of Alan Colowick, M.D., M.P.H., Patrick Machado, J.D., Beth Seidenberg, M.D., Bruce C. Cozadd, Dan Becker, M.D., Ph.D., Dawn Svoronos, Lynn Tetrault, J.D., Mina Kim and Henry O. Gosebruch ceased serving as a member of the board of directors of ACELYRIN and each committee thereof.

Departed

Dawn Svoronos

Director

ACELYRIN, Inc.

Effective: 2025-05-21
Filed: May 21, 2025 23:59 UTC

each of Alan Colowick, M.D., M.P.H., Patrick Machado, J.D., Beth Seidenberg, M.D., Bruce C. Cozadd, Dan Becker, M.D., Ph.D., Dawn Svoronos, Lynn Tetrault, J.D., Mina Kim and Henry O. Gosebruch ceased serving as a member of the board of directors of ACELYRIN and each committee thereof.

Source: SEC EDGAR

accession 0001193125-25-123707

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