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person · Reporting owner

Oosthuizen Johannes Jacobus

Disclosed activity across 2 companies

Tapewire entity
10867
SEC CIK
0001916310

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Reported relationships

Latest disclosed role at each company.

CompanyLast reported asReport datePublished
Merck & Co., Inc.MRK · Entity 2807EVP, Oncology & Int?lMay 05, 2026May 07, 2026
Vylor Inc.VYLR · Entity 183857DirectorOctober 01, 2026October 05, 2026

Disclosed balances

About these balances

Latest available filing per company, not a reconstructed current portfolio. Matching sequences show the last reported balance with all source rows expandable; grouping alone does not establish account ownership. Do not add unresolved positions together. Filings may omit unchanged positions, and amendments may correct only part of an older disclosure. Jointly reported shares are not necessarily this owner's personal holdings.

Merck & Co., Inc.

Report date May 05, 2026 · Filed May 07, 2026

Security / awardOwnership accountDisclosed shares / unitsDisclosure context
Restricted Stock UnitSEC Table II · derivative / convertible security · Expires 2029-05-05Direct10,605 Reported balance After 2026-05-05 transaction · row 2 Instrument identity requires review; Table II rows are not merged.
1 source row

Row 2 · 2026-05-05 · Grant · Acquired 10,605 · Balance 10,605

F1: Each restricted stock unit represents a contingent right to receive one share of Merck & Co., Inc. common stock.

F2: 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.

Stock Option (Right to Buy)SEC Table II · derivative / convertible security · Conversion / exercise price $113.15 · Expires 2036-05-04Direct31,044 Reported balance After 2026-05-05 transaction · row 3 Instrument identity requires review; Table II rows are not merged.
1 source row

Row 3 · 2026-05-05 · Grant · Acquired 31,044 · Balance 31,044

F3: The option vests and becomes exercisable in equal installments on 5/5/2027, 5/5/2028, and, 5/5/2029.

Common StockSEC Table I · non-derivativeDirect21,895.389 Reported balance Holding disclosure · report date 2026-05-05 · row 1 Holding and transaction disclosures are not merged.
1 source row

Row 1 · Balance 21,895.389

Filing footnotes · ownership attribution and instrument terms

F1: Each restricted stock unit represents a contingent right to receive one share of Merck & Co., Inc. common stock.

F2: 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.

F3: The option vests and becomes exercisable in equal installments on 5/5/2027, 5/5/2028, and, 5/5/2029.

Vylor Inc.

Report date October 01, 2026 · Filed October 05, 2026

This filing explicitly reported no securities owned.

Transaction history

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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 dateCompanyActivity / securityShares / unitsReported priceReported valueDetails
May 05, 2026 Filed May 7, 2026 15:42 UTC Merck & Co., Inc. MRK · Entity 2807 GrantStock Option (Right to Buy) · Derivative 31,044 $0.00 Strike: $113.15 $0.00
Disclosure

SEC 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 Merck & Co., Inc. MRK · Entity 2807 GrantRestricted Stock Unit · Derivative 10,605 $0.00 $0.00
Disclosure

SEC 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
April 29, 2026 Filed May 1, 2026 21:34 UTC Merck & Co., Inc. MRK · Entity 2807 Exercise / conversionRestricted Stock Unit · Derivative 1,377 $0.00 $0.00
Disclosure

SEC 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 Merck & Co., Inc. MRK · Entity 2807 Tax withholdingCommon Stock 679 $110.03 $74,710.37
Disclosure

SEC 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 Merck & Co., Inc. MRK · Entity 2807 Exercise / conversionCommon Stock 1,377 $110.03 $151,511.31
Disclosure

SEC 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
February 06, 2026 Filed Feb 6, 2026 21:15 UTC Merck & Co., Inc. MRK · Entity 2807 SaleCommon Stock 15,000 $121.87 $1,827,991.50
Disclosure

SEC source: 0000310158-26-000040 · form4.xml · nonDerivative · entry 1

Oosthuizen Johannes Jacobus · CIK 0001916310 · President, U.S. Market

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 21,197.389

F1 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $121.8200 to $121.9500, inclusive. The reporting person undertakes to provide to Merck & Co., Inc., any security holder of Merck & Co., Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above in this footnote.

Read SEC document
January 26, 2026 Filed Jan 28, 2026 21:12 UTC Merck & Co., Inc. MRK · Entity 2807 GrantCommon Stock 5,026 $107.40 $539,792.40
Disclosure

SEC source: 0000310158-26-000020 · form4.xml · nonDerivative · entry 1

Oosthuizen Johannes Jacobus · CIK 0001916310 · President, U.S. Market

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 36,197.389

F1 · shares: Distribution of net after tax shares of common stock on satisfaction of performance criteria for performance share units granted on 3/31/23. Performance shares were paid out at 94 percent of target awards. Includes dividends accrued over the three-year performance period ending December 31, 2025.

F2 · balance_after: Holdings include shares acquired in dividend reinvestment transactions.

Read SEC document
April 29, 2025 Filed May 1, 2025 22:06 UTC Merck & Co., Inc. MRK · Entity 2807 GrantStock Option (Right to Buy) · Derivative 18,807 $0.00 Strike: $84.71 $0.00
Disclosure

SEC source: 0001127602-25-013043 · form4.xml · derivative · entry 3

Oosthuizen Johannes Jacobus · CIK 0001916310 · President, U.S. Market

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 18,807

Underlying: Common Stock · 18,807 shares

Expires 2035-04-28

F4 · derivative.exercise_date: The option vests and becomes exercisable in three equal installments on 4/29/2026, 4/29/2027 and 4/29/2028.

Read SEC document
April 29, 2025 Filed May 1, 2025 22:06 UTC Merck & Co., Inc. MRK · Entity 2807 GrantRestricted Stock Unit · Derivative 4,132 $0.00 $0.00
Disclosure

SEC source: 0001127602-25-013043 · form4.xml · derivative · entry 2

Oosthuizen Johannes Jacobus · CIK 0001916310 · President, U.S. Market

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,132

Underlying: Common Stock · 4,132 shares

Expires 2028-04-29

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
February 19, 2025 Filed Feb 20, 2025 21:01 UTC Merck & Co., Inc. MRK · Entity 2807 SaleCommon Stock 8,500 $84.09 $714,744.60
Disclosure

SEC source: 0001127602-25-005928 · form4.xml · nonDerivative · entry 1

Oosthuizen Johannes Jacobus · CIK 0001916310 · President, U.S. Market

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 30,705.474

F1 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $84.0700 to $84.1000, inclusive. The reporting person undertakes to provide to Merck & Co., Inc., any security holder of Merck & Co., Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above in this footnote.

Read SEC document
February 08, 2025 Filed Feb 11, 2025 19:59 UTC Merck & Co., Inc. MRK · Entity 2807 Exercise / conversionRestricted Stock Unit · Derivative 13,002 $0.00 $0.00
Disclosure

SEC source: 0001127602-25-004103 · form4.xml · derivative · entry 3

Oosthuizen Johannes Jacobus · CIK 0001916310 · President, U.S. Market

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 13,002 shares

Expires 2025-02-08

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 vested and were distributed as shares of Merck & Co., Inc. common stock in one installment on 2/8/2025. The Reporting Person's Form 3 filed on 3/10/2022 incorrectly reported that these restricted units vested and were to be distributed in three equal installments on 2/8/2023, 2/8/2024, and 2/8/2025.

Read SEC document
February 08, 2025 Filed Feb 11, 2025 19:59 UTC Merck & Co., Inc. MRK · Entity 2807 Tax withholdingCommon Stock 6,404 $87.28 $558,941.12
Disclosure

SEC source: 0001127602-25-004103 · form4.xml · nonDerivative · entry 2

Oosthuizen Johannes Jacobus · CIK 0001916310 · President, U.S. Market

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 39,205.474

Read SEC document
February 08, 2025 Filed Feb 11, 2025 19:59 UTC Merck & Co., Inc. MRK · Entity 2807 Exercise / conversionCommon Stock 13,002 $87.28 $1,134,814.56
Disclosure

SEC source: 0001127602-25-004103 · form4.xml · nonDerivative · entry 1

Oosthuizen Johannes Jacobus · CIK 0001916310 · President, U.S. Market

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 45,609.474

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
January 27, 2025 Filed Jan 29, 2025 23:23 UTC Merck & Co., Inc. MRK · Entity 2807 GrantCommon Stock 8,664 $97.94 $848,552.16
Disclosure

SEC source: 0001127602-25-002351 · form4.xml · nonDerivative · entry 1

Oosthuizen Johannes Jacobus · CIK 0001916310 · President, U.S. Market

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 32,607.474

F1 · shares: Distribution of net after tax shares of common stock on satisfaction of performance criteria for performance share units granted on 3/31/22. Performance shares were paid out at 169 percent of target awards. Includes dividends accrued over the three-year performance period ending December 31, 2024.

F2 · balance_after: Holdings include shares acquired in dividend reinvestment transactions.

Read SEC document
May 04, 2024 Filed May 6, 2024 20:01 UTC Merck & Co., Inc. MRK · Entity 2807 Exercise / conversionRestricted Stock Unit · Derivative 912 $0.00 $0.00
Disclosure

SEC source: 0001127602-24-014263 · form4.xml · derivative · entry 3

Oosthuizen Johannes Jacobus · CIK 0001916310 · President, U.S. Market

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 912 shares

Expires 2024-05-04

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 vested and were distributed as shares of Merck & Co., Inc. common stock in three equal installments on 5/4/2022, 5/4/2023 and 5/4/2024.

Read SEC document
May 04, 2024 Filed May 6, 2024 20:01 UTC Merck & Co., Inc. MRK · Entity 2807 Tax withholdingCommon Stock 450 $127.51 $57,379.50
Disclosure

SEC source: 0001127602-24-014263 · form4.xml · nonDerivative · entry 2

Oosthuizen Johannes Jacobus · CIK 0001916310 · President, U.S. Market

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 23,820.949

F1 · balance_after: Holdings include shares acquired in dividend reinvestment transactions.

Read SEC document
May 04, 2024 Filed May 6, 2024 20:01 UTC Merck & Co., Inc. MRK · Entity 2807 Exercise / conversionCommon Stock 912 $127.51 $116,289.12
Disclosure

SEC source: 0001127602-24-014263 · form4.xml · nonDerivative · entry 1

Oosthuizen Johannes Jacobus · CIK 0001916310 · President, U.S. Market

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 24,270.949

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, 2024 Filed May 2, 2024 20:15 UTC Merck & Co., Inc. MRK · Entity 2807 GrantStock Option (Right to Buy) · Derivative 20,508 $0.00 Strike: $129.22 $0.00
Disclosure

SEC source: 0001127602-24-013953 · form4.xml · derivative · entry 2

Oosthuizen Johannes Jacobus · CIK 0001916310 · President, U.S. Market

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 20,508

Underlying: Common Stock · 20,508 shares

Expires 2034-04-29

F2 · derivative.exercise_date: The option vests and becomes exercisable in three equal installments on 4/30/2025, 4/30/2026 and 4/30/2027.

Read SEC document
February 02, 2024 Filed Feb 5, 2024 21:01 UTC Merck & Co., Inc. MRK · Entity 2807 Exercise / conversionStock Option (Right to Buy) · Derivative 7,119 $0.00 Strike: $87.10 $0.00
Disclosure

SEC source: 0001127602-24-003352 · form4.xml · derivative · entry 7

Oosthuizen Johannes Jacobus · CIK 0001916310 · President, U.S. Market

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 14,240

Underlying: Common Stock · 7,119 shares

Expires 2032-05-02

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.

F4 · derivative.exercise_date: The option vests and becomes exercisable in three equal installments on 5/3/2023, 5/3/2024 and 5/3/2025.

Read SEC document
February 02, 2024 Filed Feb 5, 2024 21:01 UTC Merck & Co., Inc. MRK · Entity 2807 Exercise / conversionStock Option (Right to Buy) · Derivative 7,045 $0.00 Strike: $73.73 $0.00
Disclosure

SEC source: 0001127602-24-003352 · form4.xml · derivative · entry 6

Oosthuizen Johannes Jacobus · CIK 0001916310 · President, U.S. Market

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 7,049

Underlying: Common Stock · 7,045 shares

Expires 2031-05-03

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.

F3 · derivative.exercise_date: The option vests and becomes exercisable in three equal installments on 5/4/2022, 5/4/2023 and 5/4/2024.

Read SEC document
February 02, 2024 Filed Feb 5, 2024 21:01 UTC Merck & Co., Inc. MRK · Entity 2807 Exercise / conversionStock Option (Right to Buy) · Derivative 6,773 $0.00 Strike: $75.36 $0.00
Disclosure

SEC source: 0001127602-24-003352 · form4.xml · derivative · entry 5

Oosthuizen Johannes Jacobus · CIK 0001916310 · President, U.S. Market

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 6,773 shares

Expires 2030-04-30

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_date: The option vested and became exercisable in three equal installments on 5/1/2021, 5/1/2022 and 5/1/2023.

Read SEC document
February 02, 2024 Filed Feb 5, 2024 21:01 UTC Merck & Co., Inc. MRK · Entity 2807 SaleCommon Stock 18,959 $127.18 $2,411,110.83
Disclosure

SEC source: 0001127602-24-003352 · form4.xml · nonDerivative · entry 4

Oosthuizen Johannes Jacobus · CIK 0001916310 · President, U.S. Market

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 23,327.345

F1 · balance_after: Holdings include shares acquired in dividend reinvestment transactions.

Read SEC document
February 02, 2024 Filed Feb 5, 2024 21:01 UTC Merck & Co., Inc. MRK · Entity 2807 Exercise / conversionCommon Stock 7,119 $87.10 $620,064.90
Disclosure

SEC source: 0001127602-24-003352 · form4.xml · nonDerivative · entry 3

Oosthuizen Johannes Jacobus · CIK 0001916310 · President, U.S. Market

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 42,286.345

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
February 02, 2024 Filed Feb 5, 2024 21:01 UTC Merck & Co., Inc. MRK · Entity 2807 Exercise / conversionCommon Stock 7,045 $73.73 $519,427.85
Disclosure

SEC source: 0001127602-24-003352 · form4.xml · nonDerivative · entry 2

Oosthuizen Johannes Jacobus · CIK 0001916310 · President, U.S. Market

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 35,167.345

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
February 02, 2024 Filed Feb 5, 2024 21:01 UTC Merck & Co., Inc. MRK · Entity 2807 Exercise / conversionCommon Stock 6,773 $75.36 $510,413.28
Disclosure

SEC source: 0001127602-24-003352 · form4.xml · nonDerivative · entry 1

Oosthuizen Johannes Jacobus · CIK 0001916310 · President, U.S. Market

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 28,122.345

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
January 22, 2024 Filed Jan 24, 2024 21:17 UTC Merck & Co., Inc. MRK · Entity 2807 GrantCommon Stock 3,133 $119.43 $374,174.19
Disclosure

SEC source: 0001127602-24-002036 · form4.xml · nonDerivative · entry 1

Oosthuizen Johannes Jacobus · CIK 0001916310 · President, U.S. Market

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 21,349.345

F1 · shares: Distribution of net after tax shares of common stock on satisfaction of performance criteria for performance share units granted on 3/31/21. Performance shares were paid out at 161 percent of target awards. Includes dividends accrued over the three-year performance period ending December 31, 2023.

F2 · balance_after: Holdings include shares acquired in dividend reinvestment transactions.

Read SEC document
November 09, 2023 Filed Nov 13, 2023 12:36 UTC Merck & Co., Inc. MRK · Entity 2807 SaleCommon Stock 2,081 $102.38 $213,061.31
Disclosure

SEC source: 0001127602-23-027135 · form4.xml · nonDerivative · entry 1

Oosthuizen Johannes Jacobus · CIK 0001916310 · President, U.S. Market

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 18,190.657

F1 · balance_after: Holdings include shares acquired in dividend reinvestment transactions.

Read SEC document
October 30, 2023 Filed Oct 31, 2023 15:08 UTC Merck & Co., Inc. MRK · Entity 2807 Exercise / conversionRestricted Stock Unit · Derivative 915 $0.00 $0.00
Disclosure

SEC source: 0001127602-23-026390 · form4.xml · derivative · entry 3

Oosthuizen Johannes Jacobus · CIK 0001916310 · President, U.S. Market

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 915 shares

Expires 2023-10-30

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.

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 10/30/2021, 10/30/2022 and 10/30/2023.

Read SEC document
October 30, 2023 Filed Oct 31, 2023 15:08 UTC Merck & Co., Inc. MRK · Entity 2807 Tax withholdingCommon Stock 451 $102.82 $46,371.82
Disclosure

SEC source: 0001127602-23-026390 · form4.xml · nonDerivative · entry 2

Oosthuizen Johannes Jacobus · CIK 0001916310 · President, U.S. Market

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 20,271.657

F1 · balance_after: Holdings include shares acquired in dividend reinvestment transactions.

Read SEC document
October 30, 2023 Filed Oct 31, 2023 15:08 UTC Merck & Co., Inc. MRK · Entity 2807 Exercise / conversionCommon Stock 915 $102.82 $94,080.30
Disclosure

SEC source: 0001127602-23-026390 · form4.xml · nonDerivative · entry 1

Oosthuizen Johannes Jacobus · CIK 0001916310 · President, U.S. Market

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 20,722.657

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.

Read SEC document
May 04, 2023 Filed May 5, 2023 21:09 UTC Merck & Co., Inc. MRK · Entity 2807 Exercise / conversionRestricted Stock Unit · Derivative 907 $0.00 $0.00
Disclosure

SEC source: 0001127602-23-014755 · form4.xml · derivative · entry 3

Oosthuizen Johannes Jacobus · CIK 0001916310 · President, U.S. Market

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 912

Underlying: Common Stock · 907 shares

Expires 2024-05-04

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 5/4/2022, 5/4/2023 and 5/4/2024.

Read SEC document
May 04, 2023 Filed May 5, 2023 21:09 UTC Merck & Co., Inc. MRK · Entity 2807 Tax withholdingCommon Stock 447 $118.22 $52,844.34
Disclosure

SEC source: 0001127602-23-014755 · form4.xml · nonDerivative · entry 2

Oosthuizen Johannes Jacobus · CIK 0001916310 · President, U.S. Market

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 19,759.748

Read SEC document
May 04, 2023 Filed May 5, 2023 21:09 UTC Merck & Co., Inc. MRK · Entity 2807 Exercise / conversionCommon Stock 907 $118.22 $107,225.54
Disclosure

SEC source: 0001127602-23-014755 · form4.xml · nonDerivative · entry 1

Oosthuizen Johannes Jacobus · CIK 0001916310 · President, U.S. Market

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 20,206.748

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, 2023 Filed May 4, 2023 22:01 UTC Merck & Co., Inc. MRK · Entity 2807 GrantStock Option (Right to Buy) · Derivative 20,747 $0.00 Strike: $117.89 $0.00
Disclosure

SEC source: 0001127602-23-014557 · form4.xml · derivative · entry 2

Oosthuizen Johannes Jacobus · CIK 0001916310 · President, U.S. Market

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 20,747

Underlying: Common Stock · 20,747 shares

Expires 2033-05-01

F1 · derivative.exercise_date: The option vests and becomes exercisable in equal installments on 5/2/2024, 5/2/2025 and 5/2/2026.

Read SEC document
May 01, 2023 Filed May 3, 2023 19:54 UTC Merck & Co., Inc. MRK · Entity 2807 Exercise / conversionRestricted Stock Unit · Derivative 866 $0.00 $0.00
Disclosure

SEC source: 0001127602-23-014222 · form4.xml · derivative · entry 3

Oosthuizen Johannes Jacobus · CIK 0001916310 · President, U.S. Market

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 866 shares

Expires 2023-05-01

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 5/1/2021, 5/1/2022 and 5/1/2023.

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May 01, 2023 Filed May 3, 2023 19:54 UTC Merck & Co., Inc. MRK · Entity 2807 Tax withholdingCommon Stock 427 $115.47 $49,305.69
Disclosure

SEC source: 0001127602-23-014222 · form4.xml · nonDerivative · entry 2

Oosthuizen Johannes Jacobus · CIK 0001916310 · President, U.S. Market

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 19,299.748

F1 · balance_after: Holdings include shares acquired in dividend reinvestment transactions.

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May 01, 2023 Filed May 3, 2023 19:54 UTC Merck & Co., Inc. MRK · Entity 2807 Exercise / conversionCommon Stock 866 $115.47 $99,997.02
Disclosure

SEC source: 0001127602-23-014222 · form4.xml · nonDerivative · entry 1

Oosthuizen Johannes Jacobus · CIK 0001916310 · President, U.S. Market

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 19,726.748

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.

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January 23, 2023 Filed Jan 25, 2023 22:38 UTC Merck & Co., Inc. MRK · Entity 2807 GrantCommon Stock 2,091 $109.88 $229,759.08
Disclosure

SEC source: 0001127602-23-002257 · form4.xml · nonDerivative · entry 1

Oosthuizen Johannes Jacobus · CIK 0001916310 · President, U.S. Market

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 18,821.881

F1 · shares: Distribution of net after tax shares of common stock on satisfaction of performance criteria for performance share units granted on 3/31/20. Performance shares were paid out at 110 percent of target awards. Includes dividends accrued over the three-year performance period ending December 31, 2022.

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November 09, 2022 Filed Nov 10, 2022 21:44 UTC Merck & Co., Inc. MRK · Entity 2807 SaleCommon Stock 1,795 $103.21 $185,261.95
Disclosure

SEC source: 0001127602-22-025307 · form4.xml · nonDerivative · entry 1

Oosthuizen Johannes Jacobus · CIK 0001916310 · President, U.S. Market

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 16,730.881

F1 · balance_after: Holdings include shares acquired in dividend reinvestment transactions.

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November 07, 2022 Filed Nov 7, 2022 21:09 UTC Merck & Co., Inc. MRK · Entity 2807 Exercise / conversionStock Option (Right to Buy) · Derivative 7,045 $0.00 Strike: $73.73 $0.00
Disclosure

SEC source: 0001127602-22-025022 · form4.xml · derivative · entry 9

Oosthuizen Johannes Jacobus · CIK 0001916310 · President, U.S. Market

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 14,094

Underlying: Common Stock · 7,045 shares

Expires 2031-05-03

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.

F6 · derivative.exercise_date: The options become exercisable in three equal installments on 5/4/2022, 5/4/2023 and 5/4/2024.

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November 07, 2022 Filed Nov 7, 2022 21:09 UTC Merck & Co., Inc. MRK · Entity 2807 Exercise / conversionStock Option (Right to Buy) · Derivative 13,540 $0.00 Strike: $75.36 $0.00
Disclosure

SEC source: 0001127602-22-025022 · form4.xml · derivative · entry 8

Oosthuizen Johannes Jacobus · CIK 0001916310 · President, U.S. Market

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 6,773

Underlying: Common Stock · 13,540 shares

Expires 2030-04-30

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.

F5 · derivative.exercise_date: The options become exercisable in three equal installments on 5/1/2021, 5/1/2022 and 5/1/2023.

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November 07, 2022 Filed Nov 7, 2022 21:09 UTC Merck & Co., Inc. MRK · Entity 2807 Exercise / conversionStock Option (Right to Buy) · Derivative 17,455 $0.00 Strike: $77.62 $0.00
Disclosure

SEC source: 0001127602-22-025022 · form4.xml · derivative · entry 7

Oosthuizen Johannes Jacobus · CIK 0001916310 · President, U.S. Market

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 17,455 shares

Expires 2029-05-02

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.

F4 · derivative.exercise_date: The options became exercisable in three equal installments on 5/3/2020, 5/3/2021 and 5/3/2022.

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November 07, 2022 Filed Nov 7, 2022 21:09 UTC Merck & Co., Inc. MRK · Entity 2807 Exercise / conversionStock Option (Right to Buy) · Derivative 14,703 $0.00 Strike: $62.07 $0.00
Disclosure

SEC source: 0001127602-22-025022 · form4.xml · derivative · entry 6

Oosthuizen Johannes Jacobus · CIK 0001916310 · President, U.S. Market

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 14,703 shares

Expires 2027-05-04

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.

F3 · derivative.exercise_date: The options became exercisable in three equal installments on 5/5/2018, 5/5/2019, and 5/5/2020.

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November 07, 2022 Filed Nov 7, 2022 21:09 UTC Merck & Co., Inc. MRK · Entity 2807 SaleCommon Stock 45,561 $99.47 $4,531,980.01
Disclosure

SEC source: 0001127602-22-025022 · form4.xml · nonDerivative · entry 5

Oosthuizen Johannes Jacobus · CIK 0001916310 · President, U.S. Market

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 18,525.881

F1 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $99.3700 to $99.5800, inclusive. The reporting person undertakes to provide to Merck & Co., Inc., any security holder of Merck & Co., Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above in this footnote.

F2 · balance_after: Holdings include shares acquired in dividend reinvestment transactions.

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November 07, 2022 Filed Nov 7, 2022 21:09 UTC Merck & Co., Inc. MRK · Entity 2807 Exercise / conversionCommon Stock 7,045 $0.00 $0.00
Disclosure

SEC source: 0001127602-22-025022 · form4.xml · nonDerivative · entry 4

Oosthuizen Johannes Jacobus · CIK 0001916310 · President, U.S. Market

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 64,086.881

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
November 07, 2022 Filed Nov 7, 2022 21:09 UTC Merck & Co., Inc. MRK · Entity 2807 Exercise / conversionCommon Stock 13,540 $0.00 $0.00
Disclosure

SEC source: 0001127602-22-025022 · form4.xml · nonDerivative · entry 3

Oosthuizen Johannes Jacobus · CIK 0001916310 · President, U.S. Market

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 57,041.881

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
November 07, 2022 Filed Nov 7, 2022 21:09 UTC Merck & Co., Inc. MRK · Entity 2807 Exercise / conversionCommon Stock 17,455 $0.00 $0.00
Disclosure

SEC source: 0001127602-22-025022 · form4.xml · nonDerivative · entry 2

Oosthuizen Johannes Jacobus · CIK 0001916310 · President, U.S. Market

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 43,501.881

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
November 07, 2022 Filed Nov 7, 2022 21:09 UTC Merck & Co., Inc. MRK · Entity 2807 Exercise / conversionCommon Stock 14,703 $0.00 $0.00
Disclosure

SEC source: 0001127602-22-025022 · form4.xml · nonDerivative · entry 1

Oosthuizen Johannes Jacobus · CIK 0001916310 · President, U.S. Market

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 26,046.881

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
October 30, 2022 Filed Nov 1, 2022 20:30 UTC Merck & Co., Inc. MRK · Entity 2807 Exercise / conversionRestricted Stock Unit · Derivative 913 $0.00 $0.00
Disclosure

SEC source: 0001127602-22-024599 · form4.xml · derivative · entry 4

Oosthuizen Johannes Jacobus · CIK 0001916310 · President, U.S. Market

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 915

Underlying: Common Stock · 913 shares

Expires 2023-10-30

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.

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 10/30/2021, 10/30/2022 and 10/30/2023.

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October 30, 2022 Filed Nov 1, 2022 20:30 UTC Merck & Co., Inc. MRK · Entity 2807 Tax withholdingCommon Stock 450 $100.77 $45,346.50
Disclosure

SEC source: 0001127602-22-024599 · form4.xml · nonDerivative · entry 3

Oosthuizen Johannes Jacobus · CIK 0001916310 · President, U.S. Market

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 11,343.881

F1 · balance_after: Holdings include shares acquired in dividend reinvestment transactions.

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Value uses the disclosed total when available, otherwise shares × reported transaction price. It is not an estimate of exercise cash cost or investment performance.