Johannes Jacobus Oosthuizen

Companies

• Merck & Co.President Nov 1, 2022 to now¹
• Merck & Co.SVP, U.S. Market Mar 10, 2022 to now²

Holdings

Stock this person has reported owning, from the forms officers and directors file with the SEC. See the biggest insider stakes.

Shares held

• Merck & Co. MRK21,895 shares³$3.3M at $149.02May 7, 2026

As of each latest filing. The line shows shares held over time.

Recent filings

• Apr 29, 2026Shares withheld for tax 679 shares at $110.03 of Merck & Co.⁴
• Apr 29, 2026Exercised options 1,377 shares at $110.03 of Merck & Co.⁴
• Feb 6, 2026Sold 15,000 shares at $121.87 of Merck & Co.⁵
• Jan 26, 2026Granted 5,026 shares at $107.40 of Merck & Co.⁶
• Feb 19, 2025Sold 8,500 shares at $84.09 of Merck & Co.⁷
• Feb 8, 2025Shares withheld for tax 6,404 shares at $87.28 of Merck & Co.⁸
• Feb 8, 2025Exercised options 13,002 shares at $87.28 of Merck & Co.⁸
• Jan 27, 2025Granted 8,664 shares at $97.94 of Merck & Co.⁹
• May 4, 2024Shares withheld for tax 450 shares at $127.51 of Merck & Co.¹⁰
• May 4, 2024Exercised options 912 shares at $127.51 of Merck & Co.¹⁰
• Feb 2, 2024Sold 18,959 shares at $127.18 of Merck & Co.¹¹
• Feb 2, 2024Exercised options 7,119 shares at $87.10 of Merck & Co.¹¹
• Feb 2, 2024Exercised options 7,045 shares at $73.73 of Merck & Co.¹¹
• Feb 2, 2024Exercised options 6,773 shares at $75.36 of Merck & Co.¹¹
• Jan 22, 2024Granted 3,133 shares at $119.43 of Merck & Co.¹²
• Nov 9, 2023Sold 2,081 shares at $102.38 of Merck & Co.¹³
• Oct 30, 2023Shares withheld for tax 451 shares at $102.82 of Merck & Co.¹⁴
• Oct 30, 2023Exercised options 915 shares at $102.82 of Merck & Co.¹⁴
• May 4, 2023Shares withheld for tax 447 shares at $118.22 of Merck & Co.¹⁵
• May 4, 2023Exercised options 907 shares at $118.22 of Merck & Co.¹⁵
• May 1, 2023Shares withheld for tax 427 shares at $115.47 of Merck & Co.¹⁶
• May 1, 2023Exercised options 866 shares at $115.47 of Merck & Co.¹⁶
• Jan 23, 2023Granted 2,091 shares at $109.88 of Merck & Co.¹⁷
• Nov 9, 2022Sold 1,795 shares at $103.21 of Merck & Co.¹⁸
• Nov 7, 2022Sold 45,561 shares at $99.47 of Merck & Co.¹⁹