Jeffrey Cerio - 15 Jul 2026 Form 4 Insider Report for Korro Bio, Inc. (KRRO)

Reporting relationship: General Counsel
Issuer ticker: KRRO
Reported as of: 15 Jul 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 17 Jul 2026, 07:08:03 UTC
Prior SEC filing: 17 Jun 2026
Source filing: View source filing
Reporting owner signature: /s/ Jeffrey Cerio

Key filing fact

Jeffrey Cerio filed Form 4 for Korro Bio, Inc. (KRRO) on 17 Jul 2026.

Key facts

This page summarizes Jeffrey Cerio's Form 4 filing for Korro Bio, Inc. (KRRO).
1 reported transaction and 0 derivative rows are listed below.
Accepted by SEC: 17 Jul 2026, 07:08.

Change

Previous filing in this sequence was filed on 17 Jun 2026.
Current net transaction value: $0.

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 0002033618 Primary reporting owner

Cerio Jeffrey

Relationship: General Counsel
Address: C/O KORRO BIO, INC., 60 FIRST STREET, 2ND FLOOR, SUITE 250, CAMBRIDGE
Signature: /s/ Jeffrey Cerio
Signature date: 17 Jul 2026

Reported non-derivative transactions

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

KRRO transaction

Common Stock

Award

Transaction value
Shares: +6,500
Change %: +18%
Price: $0.000000^*
Shares after: 41,793
Date: 15 Jul 2026
Ownership: Direct
Footnotes: F1, 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

Represents shares of common stock issuable upon settlement of a restricted stock unit (RSU) granted under the Issuer's 2023 Stock Option and Incentive Plan (the 2023 Plan) that will vest as follows: 50% on July 15, 2027 and 50% on July 15, 2028, in each case subject to the reporting person maintaining a continuous Service Relationship (as defined in the 2023 Plan) through each such date.

Footnote F2

Includes 27,451 shares of common stock issuable upon settlement of restricted stock units (RSUs) that remain unvested, consisting of 20,951 shares that will vest on December 15, 2026, 3,250 shares that will vest on July 15, 2027, and 3,250 shares that will vest on July 15, 2028, in each case subject to the reporting person maintaining a continuous Service Relationship (as defined in the 2023 Plan) through each such date.