Genmab — Director's Dealing 2025

Dec 18, 2025

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Merus N.V. (MRUS)
CIK: 0001651311
Period of Report: 2025-12-16

Reporting Person: GENMAB A/S (N/A)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2025-12-16	Common Shares, nominal value EUR 0.09 per share	P	120752	$97.00	Acquired	71583829	Indirect
2025-12-17	Common Shares, nominal value EUR 0.09 per share	P	150795	$97	Acquired	71734624	Indirect

Footnotes

F1: On September 29, 2025, Genmab A/S ("Parent"), Genmab Holding II B.V., a wholly owned subsidiary of Parent ("Purchaser"), and the Issuer entered into a transaction agreement (the "Transaction Agreement"). Pursuant to the terms of the Transaction Agreement, Purchaser commenced a tender offer for all the issued and outstanding common shares, nominal value EUR 0.09 per share (the "Common Shares") of the Issuer (the "Offer"), and, on December 12, 2025, following the expiration of the initial offering period of the Offer (the "Expiration Time"), Purchaser accepted 71,463,077 Common Shares that were validly tendered and not properly withdrawn pursuant to the Offer as of the Expiration Time, representing approximately 94.2% of the Issuer's outstanding Common Shares, in exchange for a cash payment equal to $97.00 per Common Share, without interest and less applicable withholding taxes.

F2: On December 12, 2025, Purchaser commenced a subsequent offering period during which Purchaser acquired an additional 120,752 Common Shares on December 16, 2025 and an additional 150,795 Common Shares on December 17, 2025. Parent, as the parent entity of Purchaser, beneficially owns the Common Shares held directly by Purchaser.