Harry Shuman - 12 Dec 2025 Form 4 Insider Report for Merus N.V. (MRUS)

Reporting relationship: VP Controller, PAO
Issuer ticker: MRUS
Reported as of: 12 Dec 2025
Net transaction value: -$1,067,194
SEC form: 4
Accepted by SEC: 12 Dec 2025, 18:55:02 UTC
Prior SEC filing: 28 Nov 2025
Source filing: View source filing
Reporting owner signature: /s/ Peter Silverman as attorney-in-fact

Filing notes and source

Key filing fact

Harry Shuman filed Form 4 for Merus N.V. (MRUS) on 12 Dec 2025.

Key facts

This page summarizes Harry Shuman's Form 4 filing for Merus N.V. (MRUS).
11 reported transactions and 10 derivative rows are listed below.
Accepted by SEC: 12 Dec 2025, 18:55.

Change

Previous filing in this sequence was filed on 28 Nov 2025.
Current net transaction value: -$1,067,194.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001791115 Primary reporting owner

Shuman Harry

Relationship: VP Controller, PAO
Address: C/O MERUS N.V., UPPSALALAAN 17, UTRECHT, NETHERLANDS
Signature: /s/ Peter Silverman as attorney-in-fact
Signature date: 12 Dec 2025

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

MRUS transaction

Common Shares

Disposition pursuant to a tender of shares in a change of control transaction

Transaction value: -$1,067,194
Shares: -11,002
Change %: -100%
Price: $97.00
Shares after: 0
Date: 12 Dec 2025
Ownership: Direct
Footnotes: F1

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

MRUS transaction Derivative

Share Option (right to buy)

Disposed to Issuer

Transaction value: $0
Shares: -7,600
Change %: -100%
Price: $0.000000
Shares after: 0
Date: 12 Dec 2025
Ownership: Direct
Underlying class: Common Shares
Underlying amount: 7,600
Exercise price: $18.61
Footnotes: F2

MRUS transaction Derivative

Share Option (right to buy)

Disposed to Issuer

Transaction value: $0
Shares: -16,000
Change %: -100%
Price: $0.000000
Shares after: 0
Date: 12 Dec 2025
Ownership: Direct
Underlying class: Common Shares
Underlying amount: 16,000
Exercise price: $24.61
Footnotes: F2

MRUS transaction Derivative

Share Option (right to buy)

Disposed to Issuer

Transaction value: $0
Shares: -4,700
Change %: -100%
Price: $0.000000
Shares after: 0
Date: 12 Dec 2025
Ownership: Direct
Underlying class: Common Shares
Underlying amount: 4,700
Exercise price: $13.23
Footnotes: F2

MRUS transaction Derivative

Share Option (right to buy)

Disposed to Issuer

Transaction value: $0
Shares: -12,400
Change %: -100%
Price: $0.000000
Shares after: 0
Date: 12 Dec 2025
Ownership: Direct
Underlying class: Common Shares
Underlying amount: 12,400
Exercise price: $24.43
Footnotes: F2

MRUS transaction Derivative

Share Option (right to buy)

Disposed to Issuer

Transaction value: $0
Shares: -5,000
Change %: -100%
Price: $0.000000
Shares after: 0
Date: 12 Dec 2025
Ownership: Direct
Underlying class: Common Shares
Underlying amount: 5,000
Exercise price: $20.15
Footnotes: F2

MRUS transaction Derivative

Share Option (right to buy)

Disposed to Issuer

Transaction value: $0
Shares: -14,500
Change %: -100%
Price: $0.000000
Shares after: 0
Date: 12 Dec 2025
Ownership: Direct
Underlying class: Common Shares
Underlying amount: 14,500
Exercise price: $16.07
Footnotes: F2

MRUS transaction Derivative

Share Option (right to buy)

Disposed to Issuer

Transaction value: $0
Shares: -23,420
Change %: -100%
Price: $0.000000
Shares after: 0
Date: 12 Dec 2025
Ownership: Direct
Underlying class: Common Shares
Underlying amount: 23,420
Exercise price: $41.65
Footnotes: F2

MRUS transaction Derivative

Share Option (right to buy)

Disposed to Issuer

Transaction value: $0
Shares: -700
Change %: -100%
Price: $0.000000
Shares after: 0
Date: 12 Dec 2025
Ownership: Direct
Underlying class: Common Shares
Underlying amount: 700
Exercise price: $25.62
Footnotes: F2

MRUS transaction Derivative

Share Option (right to buy)

Disposed to Issuer

Transaction value: $0
Shares: -27,550
Change %: -100%
Price: $0.000000
Shares after: 0
Date: 12 Dec 2025
Ownership: Direct
Underlying class: Common Shares
Underlying amount: 27,550
Exercise price: $36.09
Footnotes: F2

MRUS transaction Derivative

Share Option (right to buy)

Disposed to Issuer

Transaction value: $0
Shares: -500
Change %: -100%
Price: $0.000000
Shares after: 0
Date: 12 Dec 2025
Ownership: Direct
Underlying class: Common Shares
Underlying amount: 500
Exercise price: $39.45
Footnotes: F2

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 2 footnotes

Footnote 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, including the Shares tendered by the reporting person, 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.

Footnote 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.