Tananbaum James B. — SEC Form 4 filings
SEC reporting owner CIK 1581754. 8 Form 4 filings on record with FilingPulse; latest filed 2026-08-10.
Transaction summary — filings shown
Covers all 8 filings on record, filed 2024-04-05 to 2026-08-10. Counts and totals are arithmetic on values as filed — descriptive data, not a recommendation.
- Open-market purchases (code P, non-derivative): 12 legs across 6 filings — 3,676,850 shares, $53,349,938 total (shares × price as filed).
- Open-market sales (code S, non-derivative): none reported.
- Other reported legs (grants, option exercises, tax withholding, gifts, derivative-security transactions, …): 53.
- Largest priced transaction: purchase of 2,187,500 shares @ $16.00 ($35,000,000) in ALUMIS INC., filed 2024-07-03.
By issuer — same filings
Open-market purchase/sale legs on non-derivative securities, grouped by issuer. Role is as filed on the newest filing for that issuer. Dollar totals cover priced legs only (shares × price as filed). Ordered by priced transaction value, largest first.
| Issuer | Role (as filed) | Filings | Purchases (P) | Sales (S) | Other legs |
|---|---|---|---|---|---|
| ALUMIS INC. (ALMS) | Director, 10% owner | 6 | 11 legs · 3,536,850 sh · $50,829,938 | — | 34 |
| Latigo Biotherapeutics, Inc. (LTGO) | Director, 10% owner | 1 | 1 leg · 140,000 sh · $2,520,000 | — | 14 |
| Kinnate Biopharma Inc. (KNTE) | Director, 10% owner | 1 | — | — | 5 |
Form 4 filings — Tananbaum James B.
| Filed | Form | Issuer | Reported transactions | Source |
|---|---|---|---|---|
| 2026-08-10 | 4 | Latigo Biotherapeutics, Inc. (LTGO) | Conversion (C): 3,117,664 · Conversion (C): 445,320 · Conversion (C): 1,125,823 · Conversion (C): 742,201 · Purchase (P): 140,000 @ $18 · Conversion (C): 195,776 · +9 more | EDGAR |
| 2026-04-03 | 4 | ALUMIS INC. (ALMS) | Other (J): 1,176,470 @ $0 · Other (J): 1,123,337 @ $0 · Other (J): 1,123,337 @ $0 · Other (J): 680,486 @ $0 | EDGAR |
| 2026-01-12 | 4 | ALUMIS INC. (ALMS) | Purchase (P): 117,647 @ $17 · Purchase (P): 294,117 @ $17 | EDGAR |
| 2025-11-25 | 4 | ALUMIS INC. (ALMS) | Purchase (P): 72,212 @ $7.38 | EDGAR |
| 2025-11-19 | 4 | ALUMIS INC. (ALMS) | Purchase (P): 50,000 @ $5.60 · Purchase (P): 150,000 @ $5.59 · Purchase (P): 117,374 @ $6.19 · Purchase (P): 190,500 @ $6.56 | EDGAR |
| 2025-05-06 | 4 | ALUMIS INC. (ALMS) | Purchase (P): 25,000 @ $4.62 · Purchase (P): 20,000 @ $4.34 | EDGAR |
| 2024-07-03 | 4 | ALUMIS INC. (ALMS) | Conversion (C): 1,944,577 @ $0 · Conversion (C): 1,122,994 @ $0 · Conversion (C): 560,076 @ $0 · Conversion (C): 622,344 @ $0 · Conversion (C): 1,022,398 @ $0 · Purchase (P): 312,500 @ $16 · +26 more | EDGAR |
| 2024-04-05 | 4 | Kinnate Biopharma Inc. (KNTE) | Disposition to issuer (D): 9,671,643 · Disposition to issuer (D): 3,525,957 · Disposition to issuer (D): 520,711 · Disposition to issuer (D): 40,501 (derivative) · Disposition to issuer (D): 20,250 (derivative) | EDGAR |
FilingPulse's Form 4 archive currently extends back to 2024-01-11 and is expanding backward through EDGAR history — earlier filings by this insider may not be indexed yet. Names and roles are shown as filed.
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