Merus Executive Nets 183% Profit on Planned Stock Sale Following Options Exercise

Rhea-AI Filing Summary

Peter B. Silverman, COO & General Counsel of Merus N.V. (MRUS), executed a planned transaction under Rule 10b5-1 on June 20, 2025. The transaction involved:

• Exercise of 34,000 stock options at $18.61 per share
• Immediate sale of all 34,000 shares at a weighted average price of $52.76 (range: $52.44-$53.06)
• Retained 23,500 unexercised options from original February 14, 2020 grant

This transaction was conducted according to a pre-established Rule 10b5-1 trading plan adopted on March 20, 2025. The exercised options were fully vested, with an original expiration date of February 14, 2030. The sale represents a significant realization of gains, with approximately $1.16 million in gross proceeds before accounting for the exercise cost of $632,740.

Insider Trade Summary

Net Seller: 34,000 shares ($1,793,840)

Net Sell 3 txns

Insider Silverman Peter B.

Role COO & GC

Sold 34,000 shs ($1.79M)

Type	Security	Shares	Price	Value
Exercise	Share Option (right to buy)	34,000	$0.00	--
Exercise	Common Shares	34,000	$18.61	$633K
Sale	Common Shares	34,000	$52.76	$1.79M

Holdings After Transaction: Share Option (right to buy) — 23,500 shares (Direct); Common Shares — 34,000 shares (Direct)

Footnotes (1)

1. These transactions were effected pursuant to a Rule 10b5-1 plan adopted by the Reporting Person on March 20, 2025. Represents the exercise price of the options originally granted on February 14, 2020. Amount represents the weighted average price of shares sold, which ranged from $52.44 to $53.06. Details of individual transactions are available upon request. The options are fully vested and exercisable. Number of derivative securities beneficially owned following the reported transaction is in reference to the number of options that remain outstanding of those originally granted on February 14, 2020.

Form 4 Insider Transactions: What Each Field Means →

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

X

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Silverman Peter B.

(Last) (First) (Middle)

C/O MERUS N.V.

UPPSALALAAN 17

(Street)

UTRECHT P7 3584 CT

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
Merus N.V. [ MRUS ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	COO & GC

3. Date of Earliest Transaction (Month/Day/Year)
06/20/2025

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Shares	06/20/2025		M(1)		34,000	A	$18.61(2)	34,000	D
Common Shares	06/20/2025		S(1)		34,000	D	$52.76(3)	0	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Share Option (right to buy)	$18.61	06/20/2025		M(1)			34,000	(4)	02/14/2030	Common Shares	34,000	$0	23,500(5)	D

Explanation of Responses:

1. These transactions were effected pursuant to a Rule 10b5-1 plan adopted by the Reporting Person on March 20, 2025.

2. Represents the exercise price of the options originally granted on February 14, 2020.

3. Amount represents the weighted average price of shares sold, which ranged from $52.44 to $53.06. Details of individual transactions are available upon request.

4. The options are fully vested and exercisable.

5. Number of derivative securities beneficially owned following the reported transaction is in reference to the number of options that remain outstanding of those originally granted on February 14, 2020.

	/s/ Peter Silverman as attorney-in-fact	06/24/2025
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

What insider trading activity occurred at MRUS on June 20, 2025?

On June 20, 2025, Peter B. Silverman (COO & GC of Merus N.V.) exercised 34,000 stock options at $18.61 per share and subsequently sold all 34,000 shares at an average price of $52.76 per share. These transactions were executed according to a Rule 10b5-1 plan adopted on March 20, 2025.

What was the profit from MRUS COO's stock option exercise in June 2025?

Peter Silverman's profit from the transaction can be calculated as follows: He paid $18.61 per share to exercise 34,000 options ($632,740 total) and sold the shares at $52.76 per share ($1,793,840 total), resulting in a gross profit of approximately $1,161,100 before taxes and fees.

How many stock options does MRUS COO Peter Silverman have remaining after the June 2025 transaction?

Following the reported transaction, Peter Silverman still holds 23,500 stock options from the original grant dated February 14, 2020, with an exercise price of $18.61 and expiration date of February 14, 2030.

Was MRUS insider trading in June 2025 part of a planned transaction?

Yes, the insider trading activity was executed pursuant to a Rule 10b5-1 plan that Peter Silverman adopted on March 20, 2025. Rule 10b5-1 plans are pre-planned trading arrangements that help executives avoid accusations of insider trading by establishing the trades in advance.

What was the sale price range for MRUS shares sold by the COO in June 2025?

According to the filing, the shares were sold at prices ranging from $52.44 to $53.06 per share, with a weighted average sale price of $52.76 per share.