Tananbaum James B.

Director James B. Tananbaum buys 411,764 shares at $17.00 for $6,999,988.00; stock now at $21.09 (+83.6% in 30 days). Company unprofitable.

Director James B. Tananbaum executed 2 separate purchases totaling 411,764 shares for $6,999,988.00 at $17.00 on 2026-01-08, increasing his holdings by 16.5% to 2,908,332 shares post-transaction. The stock has surged 83.6% over the past 30 days and now trades at $21.09, approaching its 52-week high of $21.09. However, the company remains materially unprofitable with net income of $-110,752,000.00 over its most recent full fiscal year and quarterly revenue of only $2,066,000.00—raising questions about the fundamental basis for such significant insider accumulation at an already-elevated valuation. A cluster pattern of 3 other insiders buying within the past 14 days amplifies the signal, though Tananbaum's own cross-ticker track record shows a 90-day win rate of 33.33% with an average 90-day return of -11.7%, suggesting his timing has historically not been reliable beyond the near term.

Director Tananbaum buys 72,212 shares of ALMS at $7.38; 4 buys in 5 days amid -$110.8M annual loss

James B. Tananbaum (Director) purchased 72,212 shares at $7.38 on 2025-11-21, expanding his holdings from 2,542,003 to 2,614,215 shares (+2.8%). This transaction is part of a concentrated buying cluster: Tananbaum executed four separate purchases at ALMS within five calendar days (2025-11-17 through 2025-11-21), suggesting deliberate accumulation activity. The timing coincides with strong recent price momentum (30-day change: +62.5%, 90-day change: +49.0%), placing the current price $7.33 at -27.2% from the 52-week high of $10.07. However, the company's fundamentals present a significant concern: latest-quarter revenue was only $2,066,000.00 while the company posted a net loss of $-110,752,000.00 and was unprofitable over its most recent full fiscal year. Tananbaum's prior buy at this same ticker on 2025-05-06 declined -5.8% over 90 days, and his cross-ticker track record shows a 33.33% win rate on buys with an average 90-day return of -11.7%, suggesting a pattern of poorly-timed purchases. The rapid-fire accumulation in an unprofitable microcap with deteriorating fundamentals warrants investor scrutiny.

Director Tananbaum buys 507,874 shares for $3.1M at blended avg $6.09; holds 2.54M post-trade. Unprofitable company; prior ALMS buys all underwater.

Tananbaum James B., a Director at Alumis Inc., executed 4 separate purchases totaling 507,874 shares for $3,094,725.06 ($3.1M) on 2025-11-17 through 2025-11-19, at prices ranging from $5.59 to $6.56, with a blended average of $6.09. His holdings increased 25.0% to 2,542,003 shares post-transaction. The purchases occur in a context of significant operational strain: the company reported quarterly revenue of $2,066,000.00 and a net loss of $-110,752,000.00, and was unprofitable over its most recent full fiscal year. Tananbaum's prior trade history at Alumis is notably weak: 4 prior buys all experienced negative 30-day and 90-day returns (ranging from -22.8% to -30.2% at the 90-day mark), with a 0 of 4 well-timed rate at the 90-day measurement. The current price of $6.57 reflects a 30-day gain of +38.0% and 90-day gain of +42.8%, but remains 36.5% below the 52-week high of $10.35, and the stock still trades above the 52-week low of $2.80. A cluster of 3 other insiders also bought within the past 14 days, indicating coordinated acquisition activity despite the company's unprofitable state.

Director Tananbaum James B. bought 45,000 shares in 2 transactions at $4.62 and $4.34 (blended $4.50) totaling $202,300.00

Tananbaum James B., a Director at ALUMIS INC., executed two separate open-market purchases totaling 45,000 shares (45.0K shares) for $202,300.00 within a 4-day window, raising his holdings to 4,247,670 shares (4.25M shares). The transaction follows a cluster pattern, with 3 other insiders also buying within the past 14 days. However, the company is unprofitable with full-year net income of $-93,117,000.00 ($-93.1M), and the stock has declined 67.3% from its 52-week high and 56.7% over the past 30 days. Notably, Tananbaum's prior two purchases at ALMS (both on 2024-07-01) produced negative 90-day returns of -30.2%, establishing a poor timing track record at this specific ticker. These factors combine to present a mixed signal: coordinated insider buying during distress, yet against a backdrop of unprofitability and prior ill-timed accumulation at the same company.

Director Tananbaum purchases 2,500,000 shares at $16.00 for $40,000,000; cluster pattern with 2 other insiders buying within 14 days

James B. Tananbaum, a Director at ALUMIS INC., executed 2 separate purchases totaling 2,500,000 shares (2.50M shares) for $40,000,000.00 ($40.0M) at $16.00 on 2024-07-01, increasing his holdings from 1,702,670 shares to 4,202,670 shares (4.20M shares), a 146.8% increase. The transaction occurred 4 trading days before the current price of $11.65, representing a 27.2% decline from the purchase price. Notably, a cluster pattern is present: 2 other insiders also bought within the past 14 days, suggesting coordinated or contemporaneous confidence signaling at this price level. The derivative-conversion flag indicates this filing involves derivative security conversions; Table I holdings alone do not represent Tananbaum's total position, and the trade should be understood as activity within a broader derivative structure rather than as a standalone share accumulation.