Mathers Edward T 4
4 · Korro Bio, Inc. · Filed Mar 12, 2026
Research Summary
AI-generated summary of this filing
Korro Bio (KRRO) 10% Owner Edward Mathers Buys Shares
What Happened
Edward T. Mathers, a reported 10% owner of Korro Bio (KRRO), purchased two securities on March 10, 2026: 207,100 shares of common stock at $11.11 each for $2,300,881, and 242,945 pre‑funded warrants at $11.11 each for $2,698,876. The combined cash outlay for both transactions was $4,999,757 (≈ $5.0M). These were purchases (insider buys), not sales.
Key Details
- Transaction dates and prices: March 10, 2026 — 207,100 common shares @ $11.11 ($2,300,881); 242,945 pre‑funded warrants @ $11.11 ($2,698,876).
- Shares owned after transaction: Not specified in the Form 4 filing.
- Footnotes of note:
- F1: Shares/warrants were acquired from the issuer under a Subscription Agreement dated March 9, 2026.
- F3: The pre‑funded warrants are exercisable but include an ownership cap—exercise may be limited so the holder doesn’t exceed 9.99% ownership (adjustable up to 19.99% with 61 days’ notice).
- F2: Contains a beneficial‑ownership disclaimer related to NEA entity structures (legal allocation of ownership among related NEA entities).
- Filing timeliness: Reported Period of Report 3/10/2026 and filed 3/12/2026 — the Form 4 appears to have been filed on time (within the usual two‑business‑day window).
Context
- Pre‑funded warrants are a form of purchase that allow the buyer to acquire common shares later (often immediately exercisable subject to ownership limits); they are not the same as stock option exercises or awards.
- As a 10% owner, Mathers’ purchase is from an owner/investor perspective rather than a routine employee trade; purchases by insiders can be interpreted as a stronger signal than sales but do not by themselves explain motivation.
Insider Transaction Report
Form 4Exit
Korro Bio, Inc.KRRO
Mathers Edward T
10% Owner
Transactions
- Purchase
Common Stock
[F1][F2]2026-03-10$11.11/sh+207,100$2,300,881→ 1,297,893 total(indirect: See Note 2) - Purchase
Pre-Funded Warrants
[F1][F3][F2]2026-03-10$11.11/sh+242,945$2,698,876→ 242,945 total(indirect: See Note 2)Exercise: $0.00→ Common Stock (242,945 underlying)
Footnotes (3)
- [F1]Acquired from the Issuer on March 10, 2026 pursuant to a Subscription Agreement dated March 9, 2026.
- [F2]The Reporting Person is a manager of NEA 17 GP, LLC, which is the sole general partner of NEA Partners 17, L.P. ("NEA Partners 17"). NEA Partners 17 is the sole general partner of New Enterprise Associates 17, L.P. ("NEA 17"), the direct beneficial owner of the securities. The Reporting Person disclaims beneficial ownership within the meaning of Section 16 of the Securities Exchange Act of 1934, as amended, or otherwise of such portion of the securities held by NEA 17 in which the Reporting Person has no pecuniary interest.
- [F3]The Pre-Funded Warrants are exercisable at any time after their issuance; provided, however, that the Pre-Funded Warrants may not be exercised to the extent such exercise would cause the number of shares of the Issuer's Common Stock owned by the holder (together with its affiliates and certain other related parties) to exceed 9.99% of the total number of shares of the Issuer's Common Stock immediately after giving effect to such exercise, which percentage may be increased or decreased at the option of the holder upon 61 days' prior notice to the Issuer, not to exceed 19.99%.
Signature
/s/ Zachary Bambach, attorney-in-fact|2026-03-12