Mason Heather L — SEC Form 4 filings
SEC reporting owner CIK 1432601. 7 Form 4 filings on record with FilingPulse; latest filed 2026-06-18.
Transaction summary — filings shown
Covers all 7 filings on record, filed 2024-06-06 to 2026-06-18. Counts and totals are arithmetic on values as filed — descriptive data, not a recommendation.
- Open-market purchases (code P, non-derivative): 2 legs across 2 filings — 100,000 shares, $84,250 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, …): 10.
- Largest priced transaction: purchase of 75,000 shares @ $0.80 ($60,000) in Assertio Holdings, Inc., filed 2024-11-19.
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 |
|---|---|---|---|---|---|
| Assertio Holdings, Inc. (ASRT) | Director | 6 | 2 legs · 100,000 sh · $84,250 | — | 9 |
| Immatics N.V. (IMTX) | Director | 1 | — | — | 1 |
Form 4 filings — Mason Heather L
| Filed | Form | Issuer | Reported transactions | Source |
|---|---|---|---|---|
| 2026-06-18 | 4 | Immatics N.V. (IMTX) | Grant/award (A): 48,000 (derivative) @ $0 | EDGAR |
| 2026-06-16 | 4 | Assertio Holdings, Inc. (ASRT) | Code (U): 20,944 @ $0 · Code (U): 6,666 @ $0 · Disposition to issuer (D): 36,666 (derivative) · Disposition to issuer (D): 5,415 (derivative) | EDGAR |
| 2026-05-15 | 4 | Assertio Holdings, Inc. (ASRT) | Gift (G): 6,666 @ $0 · Gift (G): 6,666 @ $0 | EDGAR |
| 2026-05-06 | 4 | Assertio Holdings, Inc. (ASRT) | Grant/award (A): 4,851 @ $0 | EDGAR |
| 2025-05-09 | 4 | Assertio Holdings, Inc. (ASRT) | Grant/award (A): 53,750 @ $0 · Grant/award (A): 81,225 (derivative) @ $0 | EDGAR |
| 2024-11-19 | 4 | Assertio Holdings, Inc. (ASRT) | Purchase (P): 75,000 @ $0.80 | EDGAR |
| 2024-06-06 | 4 | Assertio Holdings, Inc. (ASRT) | Purchase (P): 25,000 @ $0.97 | 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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