Tananbaum James B. 4

What Happened
James B. Tananbaum, reported as a 10% owner related to several Foresite entities, was party to a series of in‑kind transfers on April 1, 2026 involving a total of 4,103,630 ALUMIS (ALMS) shares. The Form 4 shows two disposals (1,176,470 and 1,123,337 shares) and two acquisitions (1,123,337 and 680,486 shares), all reported at $0.00 per share (no cash consideration). These transactions are described as pro rata, in‑kind distributions among affiliated vehicles rather than open‑market purchases or sales; the net reported disposition across the transactions is approximately 495,984 shares.

Key Details

• Transaction date: April 1, 2026. All reported at $0.00 per share (in‑kind distribution/transfer).
• Total shares moved: 4,103,630 (disposed: 2,299,807; acquired: 1,803,823); net reported disposition ≈ 495,984 shares.
• Shares owned after transaction: not specified in the provided excerpt of the filing.
• Notable footnotes: filings note these were pro rata, in‑kind distributions under Rules 16a‑13 and/or 16a‑9 (F1, F3, F5, F6); many shares are held of record by Foresite funds or co‑invest vehicles and Tananbaum disclaims beneficial ownership of those fund holdings except to the extent of his pecuniary interest (F2, F4, F7–F12).
• Timeliness: filing does not indicate a late report; this Form 4 is one of three filed the same day covering related transactions.

Context

• "Other acquisition or disposition (J)" transactions and the $0 price indicate internal, in‑kind reallocations among affiliated funds/vehicles, not open‑market trades—these typically reflect administrative restructurings or distributions and do not necessarily signal a personal buy/sell decision.
• As a reported 10% owner via multiple funds/entities, Tananbaum’s filing includes standard disclaimers that beneficial ownership is limited to his pecuniary interest and that holdings are primarily record‑held by Foresite funds and co‑invest vehicles.