Info
Insider Ownership

Insider Trading & Ownership of Johannes Jacobus Oosthuizen

Location: Rahway, NJ
Summary: The estimated net worth of Johannes Jacobus Oosthuizen is at least $2,583,243 dollars as of 06 Feb 2026. Johannes Jacobus Oosthuizen is the President, U.S. Market of Merck & Co., Inc. and owns shares of Merck & Co., Inc. (MRK) stock worth about $2.58M.
Signature: /s/ Kelly E. W. Grez, as attorney-in-fact for Johannes Oosthuizen
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Ownership of Johannes Jacobus Oosthuizen

Symbol	Company	Relationship	Holdings Value	Past Year Net Change	Change %	Report Period
MRK	Merck & Co., Inc.	President, U.S. Market	$2,583,243	-$1,827,992	-41%	06 Feb 2026

Insider Transactions Reported by Johannes Jacobus Oosthuizen:

Sym	Company	Class	Transaction	%	Value $	* Price $	Shares	Shares After	Date	Ownership

* An asterisk sign (*) next to the price indicates that the price is likely invalid.