Last 12 months
Inside the activity.
0 purchase rows · 35 sale rows
Disclosed non-derivative P/S rows, by transaction month. Includes amendments and private transactions.Monthly counts
| Month | Purchases | Sales |
|---|---|---|
| Nov 2025 | 0 | 2 |
| Dec 2025 | 0 | 0 |
| Jan 2026 | 0 | 0 |
| Feb 2026 | 0 | 16 |
| Mar 2026 | 0 | 0 |
| Apr 2026 | 0 | 0 |
| May 2026 | 0 | 0 |
| Jun 2026 | 0 | 0 |
| Jul 2026 | 0 | 0 |
| Aug 2026 | 0 | 17 |
| Sep 2026 | 0 | 0 |
| Oct 2026 | 0 | 0 |
Latest available
Insider transactions
Purchases/sales include open-market and private transactions. Plan disclosure applies to the filing; individual rows may differ. “Not disclosed” is not “unplanned.”
The cutoff filters transaction history only. Company summaries and owner relationships show the latest available disclosures. Parser corrections can improve historical records.
| Transaction date | Owner / reported role | Activity / security | Shares / units | Reported price | Reported value | Details |
|---|---|---|---|---|---|---|
| May 29, 2026 Filed Jun 2, 2026 20:14 UTC |
Warden Kathy JDirector
|
GrantPhantom Stock · Derivative | 1,853.0997 | $118.72 | $220,000.00 |
DisclosureSEC source: 0000310158-26-000177 · form4.xml · derivative · entry 2 Warden Kathy J · CIK 0001559112 · Director 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 17,890.2917 Underlying: Common Stock · 1,853.0997 shares Expires not disclosed F1 · derivative.exercise_price: 1-for-1 F2 · derivative.exercise_date: Phantom stock units are to be settled 100% in cash upon reporting person's termination of service in accordance with a distribution schedule elected pursuant to the terms of the Plan for Deferred Payment of Directors' Compensation. F2 · derivative.expiration_date: Phantom stock units are to be settled 100% in cash upon reporting person's termination of service in accordance with a distribution schedule elected pursuant to the terms of the Plan for Deferred Payment of Directors' Compensation. F3 · balance_after: Holdings include shares acquired in dividend reinvestment transactions. Read SEC document |
| May 05, 2026 Filed May 7, 2026 15:36 UTC |
Guindo ChirfiEVP, Access, Policy & Comms
|
GrantStock Option (Right to Buy) · Derivative | 19,402 | $0.00 Strike: $113.15 | $0.00 |
DisclosureSEC source: 0000310158-26-000117 · form4.xml · derivative · entry 4 Guindo Chirfi · CIK 0001722753 · EVP, Access, Policy & Comms 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 19,402 Underlying: Common Stock · 19,402 shares Expires 2036-05-04 F3 · derivative.exercise_date: The option vests and becomes exercisable in equal installments on 5/5/2027, 5/5/2028, and, 5/5/2029. Read SEC document |
| May 05, 2026 Filed May 7, 2026 15:36 UTC |
Guindo ChirfiEVP, Access, Policy & Comms
|
GrantRestricted Stock Unit · Derivative | 6,628 | $0.00 | $0.00 |
DisclosureSEC source: 0000310158-26-000117 · form4.xml · derivative · entry 3 Guindo Chirfi · CIK 0001722753 · EVP, Access, Policy & Comms 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 6,628 Underlying: Common Stock · 6,628 shares Expires 2029-05-05 F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Merck & Co., Inc. common stock. F2 · derivative.exercise_date: These restricted stock units vest and are distributed as shares of Merck & Co., Inc. common stock in three equal installments on 5/5/2027, 5/5/2028, and, 5/5/2029. Read SEC document |
| May 05, 2026 Filed May 7, 2026 15:39 UTC |
Smart Dalton E. IIISVP Fin. - Global Controller
|
GrantStock Option (Right to Buy) · Derivative | 5,045 | $0.00 Strike: $113.15 | $0.00 |
DisclosureSEC source: 0000310158-26-000119 · form4.xml · derivative · entry 3 Smart Dalton E. III · CIK 0002003375 · SVP Fin. - Global Controller 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 5,045 Underlying: Common Stock · 5,045 shares Expires 2036-05-04 F3 · derivative.exercise_date: The option vests and becomes exercisable in equal installments on 5/5/2027, 5/5/2028, and, 5/5/2029. Read SEC document |
| May 05, 2026 Filed May 7, 2026 15:39 UTC |
Smart Dalton E. IIISVP Fin. - Global Controller
|
GrantRestricted Stock Unit · Derivative | 2,298 | $0.00 | $0.00 |
DisclosureSEC source: 0000310158-26-000119 · form4.xml · derivative · entry 2 Smart Dalton E. III · CIK 0002003375 · SVP Fin. - Global Controller 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 2,298 Underlying: Common Stock · 2,298 shares Expires 2029-05-05 F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Merck & Co., Inc. common stock. F2 · derivative.exercise_date: These restricted stock units vest and are distributed as shares of Merck & Co., Inc. common stock in three equal installments on 5/5/2027, 5/5/2028, and, 5/5/2029. Read SEC document |
| May 05, 2026 Filed May 7, 2026 15:42 UTC |
Oosthuizen Johannes JacobusEVP, Oncology & Int?l
|
GrantStock Option (Right to Buy) · Derivative | 31,044 | $0.00 Strike: $113.15 | $0.00 |
DisclosureSEC source: 0000310158-26-000121 · form4.xml · derivative · entry 3 Oosthuizen Johannes Jacobus · CIK 0001916310 · EVP, Oncology & Int?l 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 31,044 Underlying: Common Stock · 31,044 shares Expires 2036-05-04 F3 · derivative.exercise_date: The option vests and becomes exercisable in equal installments on 5/5/2027, 5/5/2028, and, 5/5/2029. Read SEC document |
| May 05, 2026 Filed May 7, 2026 15:42 UTC |
Oosthuizen Johannes JacobusEVP, Oncology & Int?l
|
GrantRestricted Stock Unit · Derivative | 10,605 | $0.00 | $0.00 |
DisclosureSEC source: 0000310158-26-000121 · form4.xml · derivative · entry 2 Oosthuizen Johannes Jacobus · CIK 0001916310 · EVP, Oncology & Int?l 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 10,605 Underlying: Common Stock · 10,605 shares Expires 2029-05-05 F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Merck & Co., Inc. common stock. F2 · derivative.exercise_date: These restricted stock units vest and are distributed as shares of Merck & Co., Inc. common stock in three equal installments on 5/5/2027, 5/5/2028, and, 5/5/2029. Read SEC document |
| May 05, 2026 Filed May 7, 2026 15:45 UTC |
Maraldo David R.EVP & Pres. MMD
|
GrantStock Option (Right to Buy) · Derivative | 21,731 | $0.00 Strike: $113.15 | $0.00 |
DisclosureSEC source: 0000310158-26-000123 · form4.xml · derivative · entry 4 Maraldo David R. · CIK 0002126478 · EVP & Pres. MMD 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 21,731 Underlying: Common Stock · 21,731 shares Expires 2036-05-04 F3 · derivative.exercise_date: The option vests and becomes exercisable in equal installments on 5/5/2027, 5/5/2028, and, 5/5/2029. Read SEC document |
| May 05, 2026 Filed May 7, 2026 15:45 UTC |
Maraldo David R.EVP & Pres. MMD
|
GrantRestricted Stock Unit · Derivative | 7,424 | $0.00 | $0.00 |
DisclosureSEC source: 0000310158-26-000123 · form4.xml · derivative · entry 3 Maraldo David R. · CIK 0002126478 · EVP & Pres. MMD 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 7,424 Underlying: Common Stock · 7,424 shares Expires 2029-05-05 F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Merck & Co., Inc. common stock. F2 · derivative.exercise_date: These restricted stock units vest and are distributed as shares of Merck & Co., Inc. common stock in three equal installments on 5/5/2027, 5/5/2028, and, 5/5/2029. Read SEC document |
| May 05, 2026 Filed May 7, 2026 15:48 UTC |
Foard BrianEVP, Specialty, Pharma, & ID
|
GrantStock Option (Right to Buy) · Derivative | 31,044 | $0.00 Strike: $113.15 | $0.00 |
DisclosureSEC source: 0000310158-26-000125 · form4.xml · derivative · entry 3 Foard Brian · CIK 0002119564 · EVP, Specialty, Pharma, & ID 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 31,044 Underlying: Common Stock · 31,044 shares Expires 2036-05-04 F3 · derivative.exercise_date: The option vests and becomes exercisable in equal installments on 5/5/2027, 5/5/2028, and, 5/5/2029. Read SEC document |
| May 05, 2026 Filed May 7, 2026 15:48 UTC |
Foard BrianEVP, Specialty, Pharma, & ID
|
GrantRestricted Stock Unit · Derivative | 35,351 | $0.00 | $0.00 |
DisclosureSEC source: 0000310158-26-000125 · form4.xml · derivative · entry 2 Foard Brian · CIK 0002119564 · EVP, Specialty, Pharma, & ID 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 35,351 Underlying: Common Stock · 35,351 shares Expires 2029-05-05 F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Merck & Co., Inc. common stock. F2 · derivative.exercise_date: These restricted stock units vest and are distributed as shares of Merck & Co., Inc. common stock in three equal installments on 5/5/2027, 5/5/2028, and, 5/5/2029. Read SEC document |
| May 05, 2026 Filed May 7, 2026 15:48 UTC |
Foard BrianEVP, Specialty, Pharma, & ID
|
GrantRestricted Stock Unit · Derivative | 10,605 | $0.00 | $0.00 |
DisclosureSEC source: 0000310158-26-000125 · form4.xml · derivative · entry 1 Foard Brian · CIK 0002119564 · EVP, Specialty, Pharma, & ID 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 10,605 Underlying: Common Stock · 10,605 shares Expires 2029-05-05 F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Merck & Co., Inc. common stock. F2 · derivative.exercise_date: These restricted stock units vest and are distributed as shares of Merck & Co., Inc. common stock in three equal installments on 5/5/2027, 5/5/2028, and, 5/5/2029. Read SEC document |
| May 05, 2026 Filed May 7, 2026 15:52 UTC |
Davis Robert MDirector · Chairman, CEO & President
|
GrantStock Option (Right to Buy) · Derivative | 139,697 | $0.00 Strike: $113.15 | $0.00 |
DisclosureSEC source: 0000310158-26-000127 · form4.xml · derivative · entry 3 Davis Robert M · CIK 0001363076 · Director · Chairman, CEO & President 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 139,697 Underlying: Common Stock · 139,697 shares Expires 2036-05-04 F3 · derivative.exercise_date: The option vests and becomes exercisable in equal installments on 5/5/2027, 5/5/2028, and, 5/5/2029. Read SEC document |
| May 05, 2026 Filed May 7, 2026 15:52 UTC |
Davis Robert MDirector · Chairman, CEO & President
|
GrantRestricted Stock Unit · Derivative | 47,724 | $0.00 | $0.00 |
DisclosureSEC source: 0000310158-26-000127 · form4.xml · derivative · entry 2 Davis Robert M · CIK 0001363076 · Director · Chairman, CEO & President 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 47,724 Underlying: Common Stock · 47,724 shares Expires 2029-05-05 F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Merck & Co., Inc. common stock. F2 · derivative.exercise_date: These restricted stock units vest and are distributed as shares of Merck & Co., Inc. common stock in three equal installments on 5/5/2027, 5/5/2028, and, 5/5/2029. Read SEC document |
| May 05, 2026 Filed May 7, 2026 15:56 UTC |
DeLuca Richard R.EVP&Pres, Merck Animal Heallth
|
GrantStock Option (Right to Buy) · Derivative | 34,924 | $0.00 Strike: $113.15 | $0.00 |
DisclosureSEC source: 0000310158-26-000129 · form4.xml · derivative · entry 4 DeLuca Richard R. · CIK 0001421339 · EVP&Pres, Merck Animal Heallth 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 34,924 Underlying: Common Stock · 34,924 shares Expires 2036-05-04 F3 · derivative.exercise_date: The option vests and becomes exercisable in equal installments on 5/5/2027, 5/5/2028, and, 5/5/2029. Read SEC document |
| May 05, 2026 Filed May 7, 2026 15:56 UTC |
DeLuca Richard R.EVP&Pres, Merck Animal Heallth
|
GrantRestricted Stock Unit · Derivative | 11,931 | $0.00 | $0.00 |
DisclosureSEC source: 0000310158-26-000129 · form4.xml · derivative · entry 3 DeLuca Richard R. · CIK 0001421339 · EVP&Pres, Merck Animal Heallth 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 11,931 Underlying: Common Stock · 11,931 shares Expires 2029-05-05 F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Merck & Co., Inc. common stock. F2 · derivative.exercise_date: These restricted stock units vest and are distributed as shares of Merck & Co., Inc. common stock in three equal installments on 5/5/2027, 5/5/2028, and, 5/5/2029. Read SEC document |
| May 05, 2026 Filed May 7, 2026 16:03 UTC |
Larson Betty DEVP, Chief HR Officer
|
GrantStock Option (Right to Buy) · Derivative | 23,283 | $0.00 Strike: $113.15 | $0.00 |
DisclosureSEC source: 0000310158-26-000131 · form4.xml · derivative · entry 3 Larson Betty D · CIK 0001617903 · EVP, Chief HR Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 23,283 Underlying: Common Stock · 23,283 shares Expires 2036-05-04 F3 · derivative.exercise_date: The option vests and becomes exercisable in equal installments on 5/5/2027, 5/5/2028, and, 5/5/2029. Read SEC document |
| May 05, 2026 Filed May 7, 2026 16:03 UTC |
Larson Betty DEVP, Chief HR Officer
|
GrantRestricted Stock Unit · Derivative | 7,954 | $0.00 | $0.00 |
DisclosureSEC source: 0000310158-26-000131 · form4.xml · derivative · entry 2 Larson Betty D · CIK 0001617903 · EVP, Chief HR Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 7,954 Underlying: Common Stock · 7,954 shares Expires 2029-05-05 F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Merck & Co., Inc. common stock. F2 · derivative.exercise_date: These restricted stock units vest and are distributed as shares of Merck & Co., Inc. common stock in three equal installments on 5/5/2027, 5/5/2028, and, 5/5/2029. Read SEC document |
| May 05, 2026 Filed May 7, 2026 16:07 UTC |
Li Dean YExecutive VP & President, MRL
|
GrantStock Option (Right to Buy) · Derivative | 58,207 | $0.00 Strike: $113.15 | $0.00 |
DisclosureSEC source: 0000310158-26-000133 · form4.xml · derivative · entry 3 Li Dean Y · CIK 0001837016 · Executive VP & President, MRL 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 58,207 Underlying: Common Stock · 58,207 shares Expires 2036-05-04 F3 · derivative.exercise_date: The option vests and becomes exercisable in equal installments on 5/5/2027, 5/5/2028, and, 5/5/2029. Read SEC document |
| May 05, 2026 Filed May 7, 2026 16:07 UTC |
Li Dean YExecutive VP & President, MRL
|
GrantRestricted Stock Unit · Derivative | 19,885 | $0.00 | $0.00 |
DisclosureSEC source: 0000310158-26-000133 · form4.xml · derivative · entry 2 Li Dean Y · CIK 0001837016 · Executive VP & President, MRL 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 19,885 Underlying: Common Stock · 19,885 shares Expires 2029-05-05 F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Merck & Co., Inc. common stock. F2 · derivative.exercise_date: These restricted stock units vest and are distributed as shares of Merck & Co., Inc. common stock in three equal installments on 5/5/2027, 5/5/2028, and, 5/5/2029. Read SEC document |
| May 05, 2026 Filed May 7, 2026 16:10 UTC |
Litchfield CarolineEVP & CFO
|
GrantStock Option (Right to Buy) · Derivative | 46,566 | $0.00 Strike: $113.15 | $0.00 |
DisclosureSEC source: 0000310158-26-000135 · form4.xml · derivative · entry 3 Litchfield Caroline · CIK 0001854928 · EVP & CFO 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 46,566 Underlying: Common Stock · 46,566 shares Expires 2036-05-04 F3 · derivative.exercise_date: The option vests and becomes exercisable in equal installments on 5/5/2027, 5/5/2028, and, 5/5/2029. Read SEC document |
| May 05, 2026 Filed May 7, 2026 16:10 UTC |
Litchfield CarolineEVP & CFO
|
GrantRestricted Stock Unit · Derivative | 15,908 | $0.00 | $0.00 |
DisclosureSEC source: 0000310158-26-000135 · form4.xml · derivative · entry 2 Litchfield Caroline · CIK 0001854928 · EVP & CFO 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 15,908 Underlying: Common Stock · 15,908 shares Expires 2029-05-05 F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Merck & Co., Inc. common stock. F2 · derivative.exercise_date: These restricted stock units vest and are distributed as shares of Merck & Co., Inc. common stock in three equal installments on 5/5/2027, 5/5/2028, and, 5/5/2029. Read SEC document |
| May 05, 2026 Filed May 7, 2026 16:14 UTC |
Williams David MichaelEVP,Chief Info&Digital Officer
|
GrantStock Option (Right to Buy) · Derivative | 13,582 | $0.00 Strike: $113.15 | $0.00 |
DisclosureSEC source: 0000310158-26-000137 · form4.xml · derivative · entry 3 Williams David Michael · CIK 0001820958 · EVP,Chief Info&Digital Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 13,582 Underlying: Common Stock · 13,582 shares Expires 2036-05-04 F3 · derivative.exercise_date: The option vests and becomes exercisable in equal installments on 5/5/2027, 5/5/2028, and, 5/5/2029. Read SEC document |
| May 05, 2026 Filed May 7, 2026 16:14 UTC |
Williams David MichaelEVP,Chief Info&Digital Officer
|
GrantRestricted Stock Unit · Derivative | 4,640 | $0.00 | $0.00 |
DisclosureSEC source: 0000310158-26-000137 · form4.xml · derivative · entry 2 Williams David Michael · CIK 0001820958 · EVP,Chief Info&Digital Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 4,640 Underlying: Common Stock · 4,640 shares Expires 2029-05-05 F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Merck & Co., Inc. common stock. F2 · derivative.exercise_date: These restricted stock units vest and are distributed as shares of Merck & Co., Inc. common stock in three equal installments on 5/5/2027, 5/5/2028, and, 5/5/2029. Read SEC document |
| May 05, 2026 Filed May 7, 2026 16:18 UTC |
Zachary JenniferEVP, General Counsel
|
GrantStock Option (Right to Buy) · Derivative | 35,312 | $0.00 Strike: $113.15 | $0.00 |
DisclosureSEC source: 0000310158-26-000139 · form4.xml · derivative · entry 3 Zachary Jennifer · CIK 0001737231 · EVP, General Counsel 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 35,312 Underlying: Common Stock · 35,312 shares Expires 2036-05-04 F3 · derivative.exercise_date: The option vests and becomes exercisable in equal installments on 5/5/2027, 5/5/2028, and, 5/5/2029. Read SEC document |
| May 05, 2026 Filed May 7, 2026 16:18 UTC |
Zachary JenniferEVP, General Counsel
|
GrantRestricted Stock Unit · Derivative | 12,064 | $0.00 | $0.00 |
DisclosureSEC source: 0000310158-26-000139 · form4.xml · derivative · entry 2 Zachary Jennifer · CIK 0001737231 · EVP, General Counsel 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 12,064 Underlying: Common Stock · 12,064 shares Expires 2029-05-05 F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Merck & Co., Inc. common stock. F2 · derivative.exercise_date: These restricted stock units vest and are distributed as shares of Merck & Co., Inc. common stock in three equal installments on 5/5/2027, 5/5/2028, and, 5/5/2029. Read SEC document |
| May 02, 2026 Filed May 5, 2026 17:47 UTC |
Maraldo David R.EVP & Pres. MMD
|
Exercise / conversionRestricted Stock Unit · Derivative | 552 | $0.00 | $0.00 |
DisclosureSEC source: 0000310158-26-000113 · form4.xml · derivative · entry 3 Maraldo David R. · CIK 0002126478 · EVP & Pres. MMD 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 0 Underlying: Common Stock · 552 shares Expires 2026-05-02 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Merck & Co., Inc. common stock. F2 · derivative.exercise_date: These restricted stock units vest and are distributed as shares of Merck & Co., Inc. common stock in three equal installments on 5/2/2024, 5/2/2025, and 5/2/2026. Read SEC document |
| May 02, 2026 Filed May 5, 2026 17:47 UTC |
Maraldo David R.EVP & Pres. MMD
|
Tax withholdingCommon Stock | 159 | $112.16 | $17,833.44 |
DisclosureSEC source: 0000310158-26-000113 · form4.xml · nonDerivative · entry 2 Maraldo David R. · CIK 0002126478 · EVP & Pres. MMD 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 18,212.434 Read SEC document |
| May 02, 2026 Filed May 5, 2026 17:47 UTC |
Maraldo David R.EVP & Pres. MMD
|
Exercise / conversionCommon Stock | 552 | $112.16 | $61,912.32 |
DisclosureSEC source: 0000310158-26-000113 · form4.xml · nonDerivative · entry 1 Maraldo David R. · CIK 0002126478 · EVP & Pres. MMD 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 18,371.434 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. Read SEC document |
| May 02, 2026 Filed May 5, 2026 17:51 UTC |
Smart Dalton E. IIISVP Fin. - Global Controller
|
Exercise / conversionRestricted Stock Unit · Derivative | 383 | $0.00 | $0.00 |
DisclosureSEC source: 0000310158-26-000115 · form4.xml · derivative · entry 3 Smart Dalton E. III · CIK 0002003375 · SVP Fin. - Global Controller 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 0 Underlying: Common Stock · 383 shares Expires 2026-05-02 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Merck & Co., Inc. common stock. F2 · derivative.exercise_date: These restricted stock units vest and are distributed as shares of Merck & Co., Inc. common stock in three equal installments on 5/2/2024, 5/2/2025, and 5/2/2026. Read SEC document |
| May 02, 2026 Filed May 5, 2026 17:51 UTC |
Smart Dalton E. IIISVP Fin. - Global Controller
|
Tax withholdingCommon Stock | 132 | $112.16 | $14,805.12 |
DisclosureSEC source: 0000310158-26-000115 · form4.xml · nonDerivative · entry 2 Smart Dalton E. III · CIK 0002003375 · SVP Fin. - Global Controller 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 9,388.315 Read SEC document |
| May 02, 2026 Filed May 5, 2026 17:51 UTC |
Smart Dalton E. IIISVP Fin. - Global Controller
|
Exercise / conversionCommon Stock | 383 | $112.16 | $42,957.28 |
DisclosureSEC source: 0000310158-26-000115 · form4.xml · nonDerivative · entry 1 Smart Dalton E. III · CIK 0002003375 · SVP Fin. - Global Controller 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 9,520.315 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. Read SEC document |
| April 30, 2026 Filed May 1, 2026 21:42 UTC |
Larson Betty DEVP, Chief HR Officer
|
Exercise / conversionRestricted Stock Unit · Derivative | 11,350 | $0.00 | $0.00 |
DisclosureSEC source: 0000310158-26-000084 · form4.xml · derivative · entry 6 Larson Betty D · CIK 0001617903 · EVP, Chief HR Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 11,350 Underlying: Common Stock · 11,350 shares Expires 2027-04-30 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Merck & Co., Inc. common stock. F3 · derivative.exercise_date: These restricted stock units vest and are distributed as shares of Merck & Co., Inc. common stock in three equal installments on 4/30/2025, 4/30/2026 and 4/30/2027. Read SEC document |
| April 30, 2026 Filed May 1, 2026 21:42 UTC |
Larson Betty DEVP, Chief HR Officer
|
Tax withholdingCommon Stock | 5,143 | $110.95 | $570,615.85 |
DisclosureSEC source: 0000310158-26-000084 · form4.xml · nonDerivative · entry 4 Larson Betty D · CIK 0001617903 · EVP, Chief HR Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 13,774 Read SEC document |
| April 30, 2026 Filed May 1, 2026 21:42 UTC |
Larson Betty DEVP, Chief HR Officer
|
Exercise / conversionCommon Stock | 11,350 | $110.95 | $1,259,282.50 |
DisclosureSEC source: 0000310158-26-000084 · form4.xml · nonDerivative · entry 3 Larson Betty D · CIK 0001617903 · EVP, Chief HR Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 18,917 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. Read SEC document |
| April 30, 2026 Filed May 1, 2026 21:55 UTC |
Smart Dalton E. IIISVP Fin. - Global Controller
|
Exercise / conversionRestricted Stock Unit · Derivative | 464 | $0.00 | $0.00 |
DisclosureSEC source: 0000310158-26-000090 · form4.xml · derivative · entry 6 Smart Dalton E. III · CIK 0002003375 · SVP Fin. - Global Controller 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 465 Underlying: Common Stock · 464 shares Expires 2027-04-30 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. F2 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Merck & Co., Inc. common stock. F4 · derivative.exercise_date: These restricted stock units vest and are distributed as shares of Merck & Co., Inc. common stock in three equal installments on 4/30/2025, 4/30/2026 and 4/30/2027. Read SEC document |
| April 30, 2026 Filed May 1, 2026 21:55 UTC |
Smart Dalton E. IIISVP Fin. - Global Controller
|
Tax withholdingCommon Stock | 159 | $110.95 | $17,641.05 |
DisclosureSEC source: 0000310158-26-000090 · form4.xml · nonDerivative · entry 4 Smart Dalton E. III · CIK 0002003375 · SVP Fin. - Global Controller 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 9,137.315 Read SEC document |
| April 30, 2026 Filed May 1, 2026 21:55 UTC |
Smart Dalton E. IIISVP Fin. - Global Controller
|
Exercise / conversionCommon Stock | 464 | $110.95 | $51,480.80 |
DisclosureSEC source: 0000310158-26-000090 · form4.xml · nonDerivative · entry 3 Smart Dalton E. III · CIK 0002003375 · SVP Fin. - Global Controller 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 9,296.315 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. Read SEC document |
| April 29, 2026 Filed May 1, 2026 21:34 UTC |
Oosthuizen Johannes JacobusEVP, Oncology & Int?l
|
Exercise / conversionRestricted Stock Unit · Derivative | 1,377 | $0.00 | $0.00 |
DisclosureSEC source: 0000310158-26-000078 · form4.xml · derivative · entry 3 Oosthuizen Johannes Jacobus · CIK 0001916310 · EVP, Oncology & Int?l 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 2,755 Underlying: Common Stock · 1,377 shares Expires 2028-04-29 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Merck & Co., Inc. common stock. F2 · derivative.exercise_date: These restricted stock units vest and are distributed as shares of Merck & Co., Inc. common stock in three equal installments on 4/29/2026, 4/29/2027 and 4/29/2028. Read SEC document |
| April 29, 2026 Filed May 1, 2026 21:34 UTC |
Oosthuizen Johannes JacobusEVP, Oncology & Int?l
|
Tax withholdingCommon Stock | 679 | $110.03 | $74,710.37 |
DisclosureSEC source: 0000310158-26-000078 · form4.xml · nonDerivative · entry 2 Oosthuizen Johannes Jacobus · CIK 0001916310 · EVP, Oncology & Int?l 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 21,895.389 Read SEC document |
| April 29, 2026 Filed May 1, 2026 21:34 UTC |
Oosthuizen Johannes JacobusEVP, Oncology & Int?l
|
Exercise / conversionCommon Stock | 1,377 | $110.03 | $151,511.31 |
DisclosureSEC source: 0000310158-26-000078 · form4.xml · nonDerivative · entry 1 Oosthuizen Johannes Jacobus · CIK 0001916310 · EVP, Oncology & Int?l 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 22,574.389 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. Read SEC document |
| April 29, 2026 Filed May 1, 2026 21:38 UTC |
Davis Robert MDirector · Chairman, CEO & President
|
Exercise / conversionRestricted Stock Unit · Derivative | 13,300 | $0.00 | $0.00 |
DisclosureSEC source: 0000310158-26-000080 · form4.xml · derivative · entry 3 Davis Robert M · CIK 0001363076 · Director · Chairman, CEO & President 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 26,601 Underlying: Common Stock · 13,300 shares Expires 2028-04-29 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Merck & Co., Inc. common stock. F2 · derivative.exercise_date: These restricted stock units vest and are distributed as shares of Merck & Co., Inc. common stock in three equal installments on 4/29/2026, 4/29/2027 and 4/29/2028. Read SEC document |
| April 29, 2026 Filed May 1, 2026 21:38 UTC |
Davis Robert MDirector · Chairman, CEO & President
|
Tax withholdingCommon Stock | 6,551 | $110.03 | $720,806.53 |
DisclosureSEC source: 0000310158-26-000080 · form4.xml · nonDerivative · entry 2 Davis Robert M · CIK 0001363076 · Director · Chairman, CEO & President 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 450,350.757 Read SEC document |
| April 29, 2026 Filed May 1, 2026 21:38 UTC |
Davis Robert MDirector · Chairman, CEO & President
|
Exercise / conversionCommon Stock | 13,300 | $110.03 | $1,463,399.00 |
DisclosureSEC source: 0000310158-26-000080 · form4.xml · nonDerivative · entry 1 Davis Robert M · CIK 0001363076 · Director · Chairman, CEO & President 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 456,901.757 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. Read SEC document |
| April 29, 2026 Filed May 1, 2026 21:39 UTC |
Litchfield CarolineEVP & CFO
|
Exercise / conversionRestricted Stock Unit · Derivative | 3,935 | $0.00 | $0.00 |
DisclosureSEC source: 0000310158-26-000082 · form4.xml · derivative · entry 3 Litchfield Caroline · CIK 0001854928 · EVP & CFO 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 7,870 Underlying: Common Stock · 3,935 shares Expires 2028-04-29 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. F2 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Merck & Co., Inc. common stock. F3 · derivative.exercise_date: These restricted stock units vest and are distributed as shares of Merck & Co., Inc. common stock in three equal installments on 4/29/2026, 4/29/2027 and 4/29/2028. Read SEC document |
| April 29, 2026 Filed May 1, 2026 21:39 UTC |
Litchfield CarolineEVP & CFO
|
Tax withholdingCommon Stock | 1,938 | $110.03 | $213,238.14 |
DisclosureSEC source: 0000310158-26-000082 · form4.xml · nonDerivative · entry 2 Litchfield Caroline · CIK 0001854928 · EVP & CFO 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 92,300.657 Read SEC document |
| April 29, 2026 Filed May 1, 2026 21:39 UTC |
Litchfield CarolineEVP & CFO
|
Exercise / conversionCommon Stock | 3,935 | $110.03 | $432,968.05 |
DisclosureSEC source: 0000310158-26-000082 · form4.xml · nonDerivative · entry 1 Litchfield Caroline · CIK 0001854928 · EVP & CFO 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 94,238.657 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. F1 · balance_after: Holdings include shares acquired in dividend reinvestment transactions. Read SEC document |
| April 29, 2026 Filed May 1, 2026 21:42 UTC |
Larson Betty DEVP, Chief HR Officer
|
Exercise / conversionRestricted Stock Unit · Derivative | 2,085 | $0.00 | $0.00 |
DisclosureSEC source: 0000310158-26-000084 · form4.xml · derivative · entry 5 Larson Betty D · CIK 0001617903 · EVP, Chief HR Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 4,172 Underlying: Common Stock · 2,085 shares Expires 2028-04-29 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Merck & Co., Inc. common stock. F2 · derivative.exercise_date: These restricted stock units vest and are distributed as shares of Merck & Co., Inc. common stock in three equal installments on 4/29/2026, 4/29/2027 and 4/29/2028. Read SEC document |
| April 29, 2026 Filed May 1, 2026 21:42 UTC |
Larson Betty DEVP, Chief HR Officer
|
Tax withholdingCommon Stock | 715 | $110.03 | $78,671.45 |
DisclosureSEC source: 0000310158-26-000084 · form4.xml · nonDerivative · entry 2 Larson Betty D · CIK 0001617903 · EVP, Chief HR Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 7,567 Read SEC document |
| April 29, 2026 Filed May 1, 2026 21:42 UTC |
Larson Betty DEVP, Chief HR Officer
|
Exercise / conversionCommon Stock | 2,085 | $110.03 | $229,412.55 |
DisclosureSEC source: 0000310158-26-000084 · form4.xml · nonDerivative · entry 1 Larson Betty D · CIK 0001617903 · EVP, Chief HR Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 8,282 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. Read SEC document |
Value uses the disclosed total when available, otherwise shares × reported transaction price. It is not an estimate of exercise cash cost or investment performance.