Zachary Jennifer
SEC insider (Form 3/4/5 filer). CIK 0001737231. EVP, General Counsel at Merck & Co., Inc. (MRK) and 1 other issuer. 19 reported Form 4/5 transactions since Sep 2024; latest on Aug 12, 2026. Located in RAHWAY, NJ.
Companies Zachary Jennifer has filed insider reports for
- Merck & Co., Inc. (MRK): Officer, EVP, General Counsel
- REGENXBIO Inc. (RGNX): Director
Zachary Jennifer
CIK: 0001737231
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 (19 total)
- Aug 12, 2026MRK
Merck & Co., Inc.
SaleDirect80.3K shares at avg. $133.46$10.7M - Aug 12, 2026MRK
Merck & Co., Inc.
ExerciseDirect13.4K shares at avg. $84.71$1.1M - Aug 12, 2026MRK
Merck & Co., Inc.
ExerciseDirect41.5K shares at avg. $117.89$4.9M - May 29, 2026RGNX
REGENXBIO Inc.
AwardDirect9.8K shares- - May 5, 2026MRK
Merck & Co., Inc.
AwardDirectStock Option (Right to Buy)
35.3K shares- - May 5, 2026MRK
Merck & Co., Inc.
AwardDirectRestricted Stock Unit
12.1K shares- - Apr 29, 2026MRK
Merck & Co., Inc.
Tax PaymentDirect1.5K shares at avg. $110.03$160K - Apr 29, 2026MRK
Merck & Co., Inc.
ExerciseDirect3K shares at avg. $110.03$325K - Feb 9, 2026MRK
Merck & Co., Inc.
SaleDirect56.8K shares at avg. $119.15$6.8M - Feb 9, 2026MRK
Merck & Co., Inc.
ExerciseDirect56.8K shares at avg. $119.15$6.8M
| Type | Shares | Price | Ownership | |||
|---|---|---|---|---|---|---|
| Aug 12, 2026 |  MRK Merck & Co., Inc. | Sale | 80,315 | $133.46 | $10,718,495 | Direct |
| Aug 12, 2026 | MRK Merck & Co., Inc. | Exercise | 13,433 | $84.71 | $1,137,909 | Direct |
| Aug 12, 2026 | MRK Merck & Co., Inc. | Exercise | 41,494 | $117.89 | $4,891,728 | Direct |
| May 29, 2026 |  RGNX REGENXBIO Inc. | Award | 9,807 | - | $0 | Direct |
| May 5, 2026 | MRK Merck & Co., Inc. | Award Stock Option (Right to Buy) | 35,312 | - | - | Direct |
| May 5, 2026 | MRK Merck & Co., Inc. | Award Restricted Stock Unit | 12,064 | - | - | Direct |
| Apr 29, 2026 | MRK Merck & Co., Inc. | Tax Payment | 1,454 | $110.03 | $159,984 | Direct |
| Apr 29, 2026 | MRK Merck & Co., Inc. | Exercise | 2,951 | $110.03 | $324,699 | Direct |
| Feb 9, 2026 | MRK Merck & Co., Inc. | Sale | 56,792 | $119.15 | $6,766,892 | Direct |
| Feb 9, 2026 | MRK Merck & Co., Inc. | Exercise | 56,792 | $119.15 | $6,766,892 | Direct |
1-10 of 19 transactions