InsiderFlow

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

3 trades

$3.10M

Net Position

Net Seller

$3.10M

Companies Traded

1

MRK

Active Period

Feb 2025 – Feb 2026

3 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

3 · $3.10M

Total Shares Bought

0

Total Shares Sold

29,904

MRK Price Chart
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DateTypeSharesAvg PriceValueShares After
Feb 6, 2026Sell15,000$121.87$1.83M21,197.4
Feb 20, 2025Sell8,500$84.09$714.7K0
Feb 11, 2025Sell6,404$87.28$558.9K0