Vincent Loic A 4

What Happened

• Vincent Loic A, Chief Scientific Officer of Korro Bio (KRRO), disposed of 3,418 shares on June 16, 2026, for a total reported value of $37,017. The sale was reported at a weighted-average price of $10.83 per share and was an S (sale) transaction.
• This sale was a mandatory disposition to satisfy tax withholding obligations upon the vesting/settlement of restricted stock units (RSUs), not an opportunistic open‑market investment decision.

Key Details

• Transaction date: 2026-06-16; Filing date (Form 4): 2026-06-17 (appears timely).
• Price: weighted-average $10.83; actual trade prices ranged from $10.58 to $11.35 across multiple transactions.
• Shares sold: 3,418; Proceeds: $37,017.
• Holdings after transaction: not specified in the provided excerpt. Footnote: 10,858 shares remain issuable upon settlement of an RSU that vests on Dec 15, 2026, subject to continued service.
• Footnotes: F1 = mandatory sale to satisfy tax withholding on RSU vesting; F2 = weighted-average price with per-trade range; F3 = 10,858 RSU shares vesting 12/15/2026.
• Transaction type: Sale to cover taxes (code F in effect); routine and common with equity compensation.

Context

• Mandatory sell-to-cover transactions tied to RSU vesting are routine and primarily tax-driven; they do not necessarily reflect the insider’s market view.
• For retail investors, purchases by insiders tend to be more informative; disclosures of sell-to-cover events mostly reflect compensation mechanics rather than trading intent.