Ali Behbahani - 10 Mar 2026 Form 4 Insider Report for Korro Bio, Inc. (KRRO)

Role: Director, 10%+ Owner
Signature: /s/ Zachary Bambach, attorney-in-fact
Issuer symbol: KRRO
Transactions as of: 10 Mar 2026
Net transactions value: $0
Form type: 4
Filing time: 12 Mar 2026, 20:15:10 UTC
Previous filing: 11 Feb 2026
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Behbahani Ali	Director, 10%+ Owner	2855 SAND HILL ROAD, MENLO PARK	/s/ Zachary Bambach, attorney-in-fact	12 Mar 2026	0001613867

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	KRRO	Common Stock	Award		+207,100	+19%	$11.11^*	1,297,893	10 Mar 2026	See Note 2	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	KRRO	Pre-Funded Warrants	Award		+242,945		$11.11^*	242,945	10 Mar 2026	Common Stock	242,945	$0.001000	See Note 2	F1, F2, F3

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

Explanation of Responses:

Id	Content
F1	Acquired from the Issuer on March 10, 2026 pursuant to a Subscription Agreement dated March 9, 2026.
F2	The Reporting Person is a manager of NEA 17 GP, LLC, which is the sole general partner of NEA Partners 17, L.P. ("NEA Partners 17"). NEA Partners 17 is the sole general partner of New Enterprise Associates 17, L.P. ("NEA 17"), the direct beneficial owner of the securities. The Reporting Person disclaims beneficial ownership within the meaning of Section 16 of the Securities Exchange Act of 1934, as amended, or otherwise of such portion of the securities held by NEA 17 in which the Reporting Person has no pecuniary interest.
F3	The Pre-Funded Warrants are exercisable at any time after their issuance; provided, however, that the Pre-Funded Warrants may not be exercised to the extent such exercise would cause the number of shares of the Issuer's Common Stock owned by the holder (together with its affiliates and certain other related parties) to exceed 9.99% of the total number of shares of the Issuer's Common Stock immediately after giving effect to such exercise, which percentage may be increased or decreased at the option of the holder upon 61 days' prior notice to the Issuer, not to exceed 19.99%.