HEIDEN WILLIAM K — SEC Form 4 filings
SEC reporting owner CIK 1214939. 8 Form 4 filings on record with FilingPulse; latest filed 2026-06-11.
Transaction summary — filings shown
Covers all 8 filings on record, filed 2024-04-02 to 2026-06-11. Counts and totals are arithmetic on values as filed — descriptive data, not a recommendation.
- Open-market purchases (code P, non-derivative): 2 legs across 1 filing — 100,000 shares, $150,515 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, …): 15.
- Largest priced transaction: purchase of 50,500 shares @ $1.52 ($76,760) in MACROGENICS INC, filed 2025-08-21.
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 |
|---|---|---|---|---|---|
| MACROGENICS INC (MGNX) | Director | 5 | 2 legs · 100,000 sh · $150,515 | — | 12 |
| Atara Biotherapeutics, Inc. (ATRA) | Director | 3 | — | — | 3 |
Form 4 filings — HEIDEN WILLIAM K
| Filed | Form | Issuer | Reported transactions | Source |
|---|---|---|---|---|
| 2026-06-11 | 4 | Atara Biotherapeutics, Inc. (ATRA) | Grant/award (A): 12,000 @ $0 | EDGAR |
| 2026-05-20 | 4 | MACROGENICS INC (MGNX) | Option exercise (M): 3,750 · Option exercise (M): 3,750 (derivative) @ $0 · Grant/award (A): 3,750 (derivative) @ $0 · Grant/award (A): 22,000 (derivative) @ $0 | EDGAR |
| 2025-08-21 | 4 | MACROGENICS INC (MGNX) | Purchase (P): 50,500 @ $1.52 · Purchase (P): 49,500 @ $1.49 | EDGAR |
| 2025-06-12 | 4 | Atara Biotherapeutics, Inc. (ATRA) | Grant/award (A): 7,828 @ $0 | EDGAR |
| 2025-05-22 | 4 | MACROGENICS INC (MGNX) | Option exercise (M): 6,500 · Option exercise (M): 6,500 (derivative) @ $0 · Grant/award (A): 3,750 (derivative) @ $0 · Grant/award (A): 22,000 (derivative) @ $0 | EDGAR |
| 2024-05-23 | 4 | MACROGENICS INC (MGNX) | Grant/award (A): 6,500 (derivative) @ $0 · Grant/award (A): 16,500 (derivative) @ $0 | EDGAR |
| 2024-05-22 | 4 | MACROGENICS INC (MGNX) | Option exercise (M): 4,500 @ $0 · Option exercise (M): 4,500 (derivative) @ $0 | EDGAR |
| 2024-04-02 | 4 | Atara Biotherapeutics, Inc. (ATRA) | Grant/award (A): 150,000 @ $0 | 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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