Cerio Jeffrey 4

What Happened Jeffrey Cerio, General Counsel of Korro Bio (KRRO), sold 6,609 shares on June 16, 2026, for a reported weighted-average price of $10.83, generating proceeds of approximately $71,575. The sale was a mandatory disposition solely to satisfy tax withholding obligations upon vesting and settlement of a restricted stock unit (RSU).

Key Details

• Transaction date: 2026-06-16; Filing date: 2026-06-17 (timely).
• Transaction type: Sale (S) — mandatory tax-withholding disposition of RSU (Footnote F1).
• Reported weighted-average price: $10.83; actual sale prices ranged $10.58–$11.35 across multiple transactions (Footnote F2).
• Shares sold: 6,609; proceeds ≈ $71,575.
• Shares issuable/subject to future vesting: includes 20,951 shares issuable upon settlement of an RSU that vests Dec 15, 2026, contingent on continue service (Footnote F3).
• Filing does not indicate a 10b5-1 plan or late filing.

Context This sale was executed to satisfy tax withholding on vested RSUs, a common and routine insider sale that does not necessarily indicate a change in the insider’s view of the company. For retail investors, purchases typically carry clearer bullish signals than mandatory withholding sales.