Cerio Jeffrey 4

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.