MACKAY MARTIN — SEC Form 4 filings
SEC reporting owner CIK 1414815. 11 Form 4 filings on record with FilingPulse; latest filed 2026-05-11.
Transaction summary — filings shown
Covers all 11 filings on record, filed 2024-02-16 to 2026-05-11. Counts and totals are arithmetic on values as filed — descriptive data, not a recommendation.
- Open-market purchases (code P, non-derivative): none reported.
- Open-market sales (code S, non-derivative): none reported.
- Other reported legs (grants, option exercises, tax withholding, gifts, derivative-security transactions, …): 18.
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 |
|---|---|---|---|---|---|
| CHARLES RIVER LABORATORIES INTERNATIONAL, INC. (CRL) | Director | 3 | — | — | 8 |
| SpringWorks Therapeutics, Inc. (SWTX) | Director | 3 | — | — | 5 |
| Rallybio Corp (RLYB) | Director | 4 | — | — | 4 |
| Kailera Therapeutics, Inc. (KLRA) | Director | 1 | — | — | 1 |
Form 4 filings — MACKAY MARTIN
| Filed | Form | Issuer | Reported transactions | Source |
|---|---|---|---|---|
| 2026-05-11 | 4 | CHARLES RIVER LABORATORIES INTERNATIONAL, INC. (CRL) | Grant/award (A): 1,438 @ $177.62 · Grant/award (A): 1,407 @ $177.62 | EDGAR |
| 2026-04-20 | 4 | Kailera Therapeutics, Inc. (KLRA) | Grant/award (A): 38,300 (derivative) @ $0 | EDGAR |
| 2026-02-20 | 4 | Rallybio Corp (RLYB) | Grant/award (A): 18,055 (derivative) @ $3.60 | EDGAR |
| 2025-07-02 | 4 | SpringWorks Therapeutics, Inc. (SWTX) | Disposition to issuer (D): 20,023 · Disposition to issuer (D): 29,445 (derivative) | EDGAR |
| 2025-05-23 | 4 | CHARLES RIVER LABORATORIES INTERNATIONAL, INC. (CRL) | Grant/award (A): 946 @ $134.98 · Grant/award (A): 815 @ $134.98 · Grant/award (A): 2,076 (derivative) @ $134.98 | EDGAR |
| 2025-05-15 | 4 | SpringWorks Therapeutics, Inc. (SWTX) | Grant/award (A): 10,060 @ $0 | EDGAR |
| 2025-05-15 | 4 | Rallybio Corp (RLYB) | Grant/award (A): 28,500 (derivative) @ $0 | EDGAR |
| 2025-01-06 | 4 | Rallybio Corp (RLYB) | Grant/award (A): 92,857 (derivative) @ $0.70 | EDGAR |
| 2024-07-30 | 4 | SpringWorks Therapeutics, Inc. (SWTX) | Grant/award (A): 9,963 @ $0 · Grant/award (A): 29,445 (derivative) @ $0 | EDGAR |
| 2024-05-15 | 4 | CHARLES RIVER LABORATORIES INTERNATIONAL, INC. (CRL) | Grant/award (A): 559 @ $228.41 · Grant/award (A): 372 @ $228.41 · Grant/award (A): 1,311 (derivative) @ $228.41 | EDGAR |
| 2024-02-16 | 4 | Rallybio Corp (RLYB) | Grant/award (A): 216,000 (derivative) @ $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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