Merus N.V. — Director's Dealing 2025

Dec 13, 2025

SEC Form 4 — Statement of Changes in Beneficial Ownership

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

Reporting Person: Silverman Peter B. (N/A)

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2025-12-12	Share Option (right to buy)	$24.43	D	50000	Disposed	2031-02-16	Common Shares (50000)	Direct
2025-12-12	Share Option (right to buy)	$41.65	D	125000	Disposed	2035-01-29	Common Shares (125000)	Direct
2025-12-12	Share Option (right to buy)	$36.09	D	107300	Disposed	2034-01-31	Common Shares (107300)	Direct
2025-12-12	Share Option (right to buy)	$11.16	D	3900	Disposed	2029-02-20	Common Shares (3900)	Direct
2025-12-12	Share Option (right to buy)	$12.37	D	12714	Disposed	2030-04-16	Common Shares (12714)	Direct
2025-12-12	Share Option (right to buy)	$16.07	D	104000	Disposed	2033-02-02	Common Shares (104000)	Direct
2025-12-12	Share Option (right to buy)	$15.87	D	20000	Disposed	2033-01-01	Common Shares (20000)	Direct
2025-12-12	Share Option (right to buy)	$24.61	D	83000	Disposed	2032-01-31	Common Shares (83000)	Direct

Footnotes

F1: On September 29, 2025, Merus N.V. (the "Issuer") entered into a transaction agreement (as it may be amended, supplemented or otherwise modified from time to time, the "Transaction Agreement") with Genmab A/S ("Genmab") and its wholly owned subsidiary, Genmab Holding II B.V. (the "Purchaser"). Pursuant to the terms of the Transaction Agreement, the Purchaser commenced a tender offer for all the issued and outstanding common shares, par value EUR 0.09 per share (the "Shares"), of the Issuer (the "Offer"), and, on December 12, 2025 (the "Acceptance Time"), the Purchaser accepted all of the Shares that were validly tendered and not properly withdrawn pursuant to the Offer as of the Acceptance Time in exchange for a cash payment equal to $97.00 per Share, without interest and less applicable withholding taxes (the "Offer Consideration"), which Offer Consideration will be paid as soon as practicable following the Acceptance Time.

F2: This option was cancelled pursuant to the Transaction Agreement in exchange for cash (without interest and net of applicable withholding tax and other applicable deductions) in an amount equal to the product of (i) the amount by which the Offer Consideration exceeds the applicable exercise price per Share of such option and (ii) the aggregate number of Shares underlying such option.