ALUMIS INC. 8-K

What Happened
Alumis, Inc. (ALMS) filed a Form 8-K reporting (Item 2.02) a preliminary, unaudited cash, cash equivalents and marketable securities balance of approximately $308.6 million as of December 31, 2025, and (Item 8.01) that it entered an underwriting agreement for a public offering of common stock. The offering was priced at $17.00 per share and initially comprised 17,650,000 shares; the underwriters’ 30-day option to purchase an additional 2,647,500 shares was exercised in full on January 8, 2026, bringing the total to 20,297,500 shares. Gross proceeds to the company are approximately $345.1 million, before underwriting discounts, commissions and estimated offering expenses. The offering was made under the company’s Form S-3 shelf (File No. 333-288510) and the closing was expected on January 9, 2026.

Key Details

• Preliminary cash, cash equivalents and marketable securities as of 12/31/2025: ~$308.6 million (unaudited; subject to change).
• Public offering: 17,650,000 shares at $17.00 per share; over-allotment option of 2,647,500 shares exercised in full, total 20,297,500 shares.
• Approximate gross proceeds: ~$345.1 million before underwriting discounts, commissions and expenses.
• Underwriting representatives: Morgan Stanley, Leerink Partners and Cantor Fitzgerald; offering made under Form S-3 effective Aug 19, 2025. PwC has not audited or reviewed the preliminary cash figure.

Why It Matters
This filing shows Alumis raising a material amount of capital via a registered public offering, which will increase the company’s cash position but also increase outstanding shares (dilution risk). The reported cash balance is preliminary and unaudited, so investors should await finalized quarter- and year-end financial statements for confirmation. The proceeds from the offering could affect the company’s liquidity and funding plans; review the company’s prospectus and upcoming SEC filings for details on use of proceeds and updated financial results.