Climb Bio (CLYM) CFO granted 142,500 stock options at $3.81 strike

Rhea-AI Filing Summary

Climb Bio, Inc. reported that its Chief Financial Officer, Susan Altschuller, received a new stock option grant. On January 6, 2026, she was awarded a stock option to buy 142,500 shares of Climb Bio common stock at an exercise price of $3.81 per share. Following this grant, she beneficially owned 142,500 derivative securities in the form of this option, held directly.

The option vests over time. According to the disclosure, 25% of the shares vest on the first anniversary of the January 6, 2026 grant date, and the remaining shares vest in 36 equal monthly installments through January 6, 2030, as long as she continues in service. The option expires on January 5, 2036.

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).

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^*

ALTSCHULLER Susan

(Last) (First) (Middle)

C/O CLIMB BIO, INC.

20 WILLIAM STREET, SUITE 145

(Street)

WELLESLEY HILLS MA 02481

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
Climb Bio, Inc. [ CLYM ]

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

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Chief Financial Officer

3. Date of Earliest Transaction (Month/Day/Year)
01/06/2026

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

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
Stock Option (Right to Buy)	$3.81	01/06/2026		A		142,500		(1)	01/05/2036	Common Stock	142,500	$0.00	142,500	D

Explanation of Responses:

1. This option was granted on January 6, 2026 (the "Grant Date"). The shares underlying the option are scheduled to vest with respect to 25% of the shares on the first anniversary of the Grant Date and the remainder are scheduled to vest in 36 equal monthly installments through January 6, 2030, subject to the Reporting Person's continued service.

	/s/ Chandra Adams, as Attorney-in-Fact	01/08/2026
	** 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 transaction did Climb Bio (CLYM) report in this Form 4?

Climb Bio reported a stock option grant to its Chief Financial Officer, Susan Altschuller, covering 142,500 shares of common stock.

Who is the reporting person in this Climb Bio (CLYM) Form 4 filing?

The reporting person is Susan Altschuller, who serves as Chief Financial Officer of Climb Bio, Inc.

How many Climb Bio shares are covered by the new stock option grant?

The stock option is a right to buy 142,500 shares of Climb Bio common stock, all reflected as beneficially owned following the reported transaction.

What is the exercise price and term of the Climb Bio CFO’s stock option?

The option has an exercise price of $3.81 per share and an expiration date of January 5, 2036, giving a long-dated right to purchase shares.

How does the Climb Bio CFO stock option vest over time?

The option vests with respect to 25% of the shares on the first anniversary of the January 6, 2026 grant date, and the remaining shares vest in 36 equal monthly installments through January 6, 2030, subject to continued service.

Is the stock option reported in the Climb Bio (CLYM) Form 4 held directly or indirectly?

The Form 4 shows the 142,500 stock options as directly owned by the reporting person.