MACKAY MARTIN
SEC insider (Form 3/4/5 filer). CIK 0001414815. Director at CHARLES RIVER LABORATORIES INTERNATIONAL, INC. (CRL) and 3 other issuers. 10 reported Form 4/5 transactions since Sep 2024; latest on May 8, 2026. Located in WALTHAM, MA.
Companies MACKAY MARTIN has filed insider reports for
- CHARLES RIVER LABORATORIES INTERNATIONAL, INC. (CRL): Director
- Kailera Therapeutics, Inc. (KLRA): Director
- Rallybio Corp (RLYB): Director
- SpringWorks Therapeutics, Inc. (SWTX): Director
MACKAY MARTIN
CIK: 0001414815
Transaction Breakdown
High conviction signal
Position reduction
Derivative conversions
Compensation grants
Gifts, tax withholding, conversions, dispositions to the issuer and other codes
Discretionary Trading P&L
Holdings
Transaction History (10 total)
- May 8, 2026CRL
CHARLES RIVER LABORATORIES INTERNATIONAL, INC.
AwardDirect1.4K shares at avg. $177.62$255K - May 8, 2026CRL
CHARLES RIVER LABORATORIES INTERNATIONAL, INC.
AwardDirect1.4K shares at avg. $177.62$250K - Apr 16, 2026KLRA
Kailera Therapeutics, Inc.
AwardDirectStock Option (right to buy)
38.3K shares- - Feb 18, 2026RLYB
Rallybio Corp
AwardDirectOption (Right to Buy)
18.1K shares at avg. $3.60- - Jul 1, 2025SWTX
SpringWorks Therapeutics, Inc.
DispositionDirect20K shares- - May 21, 2025CRL
CHARLES RIVER LABORATORIES INTERNATIONAL, INC.
AwardDirect946 shares at avg. $134.98$128K - May 21, 2025CRL
CHARLES RIVER LABORATORIES INTERNATIONAL, INC.
AwardDirect815 shares at avg. $134.98$110K - May 14, 2025SWTX
SpringWorks Therapeutics, Inc.
AwardDirect10.1K shares- - May 13, 2025RLYB
Rallybio Corp
AwardDirectOption (Right to Buy)
28.5K shares- - Jan 2, 2025RLYB
Rallybio Corp
AwardDirectOption (Right to Buy)
92.9K shares at avg. $0.70-
| Type | Shares | Price | Ownership | |||
|---|---|---|---|---|---|---|
| May 8, 2026 |  CRL CHARLES RIVER LABORATORIES INTERNATIONAL, INC. | Award | 1,438 | $177.62 | $255,418 | Direct |
| May 8, 2026 | CRL CHARLES RIVER LABORATORIES INTERNATIONAL, INC. | Award | 1,407 | $177.62 | $249,911 | Direct |
| Apr 16, 2026 |  KLRA Kailera Therapeutics, Inc. | Award Stock Option (right to buy) | 38,300 | - | - | Direct |
| Feb 18, 2026 |  RLYB Rallybio Corp | Award Option (Right to Buy) | 18,055 | $3.60 | - | Direct |
| Jul 1, 2025 |  SWTX SpringWorks Therapeutics, Inc. | Disposition | 20,023 | - | - | Direct |
| May 21, 2025 | CRL CHARLES RIVER LABORATORIES INTERNATIONAL, INC. | Award | 946 | $134.98 | $127,691 | Direct |
| May 21, 2025 | CRL CHARLES RIVER LABORATORIES INTERNATIONAL, INC. | Award | 815 | $134.98 | $110,009 | Direct |
| May 14, 2025 | SWTX SpringWorks Therapeutics, Inc. | Award | 10,060 | - | - | Direct |
| May 13, 2025 | RLYB Rallybio Corp | Award Option (Right to Buy) | 28,500 | - | - | Direct |
| Jan 2, 2025 | RLYB Rallybio Corp | Award Option (Right to Buy) | 92,857 | $0.70 | - | Direct |
1-10 of 10 transactions