Cerio Jeffrey 4

4 · Korro Bio, Inc. · Filed Jul 17, 2026

AI-generated summary of this filing

Updated Jul 17, 2026

Korro Bio (KRRO) General Counsel Jeffrey Cerio Receives RSU Award

What Happened

Jeffrey Cerio, General Counsel of Korro Bio (KRRO), was granted 6,500 restricted stock units (RSUs) on July 15, 2026. The Form 4 reports the acquisition at $0.00 (standard for RSU grants), so no cash was paid.
The newly granted RSUs vest 50% on July 15, 2027 and 50% on July 15, 2028, subject to continued service. This is an equity award, not an open‑market purchase or sale.

Key Details

Transaction date: July 15, 2026; filing date: July 17, 2026 (filed within standard Form 4 timing).
Transaction type/code: Award/Grant (A); price reported: $0.00 per share.
Vesting for the 6,500 RSUs: 50% on July 15, 2027 and 50% on July 15, 2028, subject to continuous service (footnote F1).
The filing also discloses 27,451 other unvested RSUs outstanding for the reporting person: 20,951 vest on December 15, 2026; 3,250 on July 15, 2027; and 3,250 on July 15, 2028 (footnote F2).
No indication of a 10b5-1 plan, cashless exercise, tax withholding sale, or other sale/transfer in this filing.

Context

RSUs are conditional equity awards that convert to actual shares only upon vesting and continued service; they do not represent immediately tradable shares.
This transaction is an executive compensation grant rather than a market buy/sell and should be viewed as part of routine equity compensation.

Form 4

Period: 2026-07-15

General Counsel

Transactions

Footnotes (2)

[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.
[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.

Signature

/s/ Jeffrey Cerio|2026-07-17

1 file