Nessan Bermingham - 10 Jun 2026 Form 4 Insider Report for Korro Bio, Inc. (KRRO)

Reporting relationship: Director
Issuer ticker: KRRO
Reported as of: 10 Jun 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 11 Jun 2026, 18:04:03 UTC
Prior SEC filing: 12 Jun 2025
Source filing: View source filing
Reporting owner signature: /s/ Jeffrey Cerio, attorney-in-fact

Key filing fact

Nessan Bermingham filed Form 4 for Korro Bio, Inc. (KRRO) on 11 Jun 2026.

Key facts

This page summarizes Nessan Bermingham's Form 4 filing for Korro Bio, Inc. (KRRO).
1 reported transaction and 1 derivative row are listed below.
Accepted by SEC: 11 Jun 2026, 18:04.

Change

Previous filing in this sequence was filed on 12 Jun 2025.
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 0001377759 Primary reporting owner

Bermingham Nessan

Relationship: Director
Address: C/O KORRO BIO, INC., 60 FIRST STREET, 2ND FLOOR, SUITE 250, CAMBRIDGE
Signature: /s/ Jeffrey Cerio, attorney-in-fact
Signature date: 11 Jun 2026

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

KRRO transaction Derivative

Stock Option (Right to Buy)

Award

Transaction value
Shares: +14,677
Change %
Price: $0.000000^*
Shares after: 14,677
Date: 10 Jun 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 14,677
Exercise price: $10.59
Footnotes: F1

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 1 footnote

Footnote F1

The shares subject to the option vest in full on the earlier of (i) the one-year anniversary of the grant date or (ii) the date of the next annual meeting of stockholders, subject to continued service as a non-employee director through the applicable vesting date.