Dominic Smethurst - 14 Jan 2026 Form 4 Insider Report for Corbus Pharmaceuticals Holdings, Inc. (CRBP)

Role: Chief Medical Officer
Signature: /s/ Meghan Houghton, Attorney-in-Fact for Dominic Smethurst
Issuer symbol: CRBP
Transactions as of: 14 Jan 2026
Net transactions value: $0
Form type: 4
Filing time: 16 Jan 2026, 16:30:10 UTC
Previous filing: 07 Mar 2025
Next filing: 04 Feb 2026
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Smethurst Dominic	Chief Medical Officer	C/O CORBUS PHARMACEUTICALS HOLDINGS, INC, 500 RIVER RIDGE DRIVE, NORWOOD	/s/ Meghan Houghton, Attorney-in-Fact for Dominic Smethurst	16 Jan 2026	0001820549

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	CRBP	Common Stock, par value $0.0001 per share	Award	$0	+28,365	+40%	$0.000000	99,172	14 Jan 2026	Direct	F1, F2

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	CRBP	Stock options (right to buy)	Award	$0	+85,095		$0.000000	85,095	14 Jan 2026	Common Stock	85,095	$8.26	Direct	F3

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

Explanation of Responses:

Id	Content
F1	On January 14, 2026, the Reporting Person was granted 28,365 restricted stock units ("RSUs"), which will be settled in shares of common stock, par value $0.0001. 25% of the RSUs shall vest on each of the first, second, third and fourth anniversary beginning on January 14, 2027. Notwithstanding the foregoing, upon termination of the Reporting Person's Service by the Company without cause, provided that such termination occurs after the first Vesting Date, then a pro rata portion of the RSUs shall accelerate in an amount equal to the product of (x) the number of RSUs scheduled to vest on the next Vesting Date and (y) a fraction, the numerator of which is the number of completed months of service the Awardee worked since the most recent Vesting Date through the date of Awardees termination of Service and the denominator of which is 12. The RSUs, to the extent not accelerated in accordance with this paragraph shall be forfeited upon such Reporting Person's termination of service.
F2	This amount includes 93,065 unvested RSUs subject to each grant's vesting schedule as previously reported.
F3	The annual option award was made in accordance with the terms of the issuer's 2024 Equity Compensation Plan. 25% of the option vests on January 14, 2027, with the remaining 75% of the option vesting in equal monthly installments over a period of 36 months commencing on February 14, 2027.