Johannes Jacobus Oosthuizen

MRK

Johannes Jacobus Oosthuizen serves as officer: President, U.S. Market at Merck & Co., Inc. (MRK). This page tracks their complete SEC Form 4 insider trading history including stock purchases and sales.

Total Buys

0 trades

$0.00

Total Sells

8 trades

$10.81M

Net Position

Net Seller

$10.81M

Companies Traded

MRK

Active Period

Nov 2022 – Feb 2026

8 total trades

Most Recent

Sell MRK

Feb 6, 2026 · $1.83M

Johannes Jacobus Oosthuizen's Insider Trading at Merck & Co., Inc. (MRK)

Buys

0 · $0.00

Sells

8 · $10.81M

Total Shares Bought

Total Shares Sold

101,933

MRK Price Chart

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Date	Type	Shares	Avg Price	Value	Shares After
Feb 6, 2026	Sell	15,000	$121.87	$1.83M	21,197
Feb 20, 2025	Sell	8,500	$84.09	$714.7K	0
Feb 11, 2025	Sell	6,404	$87.28	$558.9K	0
Feb 5, 2024	Sell	18,959	$127.17	$2.41M	23,327
Nov 13, 2023	Sell	2,081	$102.38	$213.1K	18,191
Nov 10, 2022	Sell	1,795	$103.21	$185.3K	16,731
Nov 7, 2022	Sell	45,561	$99.47	$4.53M	18,526
Nov 1, 2022	Sell	3,633	$100.21	$364.1K	10,881