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CIK 0001703647 · Non-accelerated filer<br>Smaller reporting company

Korro Bio, Inc.

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Ticker
KRRO
Exchange
Nasdaq
Industry
Pharmaceutical Preparations
FY end
Dec 31
Incorporated
DE
Entity type
operating
EIN
472324450
Phone
617-468-1999
Business address
60 FIRST STREET, 2ND FLOOR, SUITE 250, CAMBRIDGE, MA, 02141
Former names
Frequency Therapeutics, Inc.
Open-market buys, last 90 days
$884,752
in 1 filing
Open-market sales, last 90 days
$2,161,962
in 6 filings, $2.2M under 10b5-1 plans

Net −$1,277,210. Shares bought or sold at a price by officers, directors and 10% owners (Form 4 codes P and S). Grants, option exercises and tax withholding aren't counted.

Pace of trading Bought Sold

Who's trading

90 days

  1. FORMELA JEAN FRANCOIS −$2.1M Director sold 54% of stake
  2. Lynx1 Capital Management LP +$885K 10% owner 1 filing
  3. Dolan Oliver −$99K Senior Vice President, Finance sold 31% of stake

Reading 100 more Form 4s from the SEC; this list fills in as they're read.

Date Insider Transaction Shares Price Value Owned after
2026-03-10 SANDELL SCOTT D 10% owner Purchase · Pre-Funded Warrants +242,945 $11.11 $2.7M 242,945
2026-03-10 New Enterprise Associates 17, L.P. 10% owner Purchase +207,100 $11.11 $2.3M 1,297,893
2026-03-10 New Enterprise Associates 17, L.P. 10% owner Purchase · Pre-Funded Warrants +242,945 $11.11 $2.7M 242,945
2026-03-10 Behbahani Ali Director Grant or award +207,100 $11.11 $2.3M 1,297,893
2026-03-10 Behbahani Ali Director Grant or award · Pre-Funded Warrants +242,945 $11.11 $2.7M 242,945
2026-03-10 Chang Carmen 10% owner Purchase +207,100 $11.11 $2.3M 1,297,893
2026-03-10 Chang Carmen 10% owner Purchase · Pre-Funded Warrants +242,945 $11.11 $2.7M 242,945
2026-03-10 BASKETT FOREST 10% owner Purchase +207,100 $11.11 $2.3M 1,297,893
2026-03-10 BASKETT FOREST 10% owner Purchase · Pre-Funded Warrants +242,945 $11.11 $2.7M 242,945
2026-03-10 Mathers Edward T 10% owner Purchase +207,100 $11.11 $2.3M 1,297,893
2026-03-10 Mathers Edward T 10% owner Purchase · Pre-Funded Warrants +242,945 $11.11 $2.7M 242,945
2026-03-10 Walker Paul Edward 10% owner Purchase +207,100 $11.11 $2.3M 1,297,893
2026-03-10 Walker Paul Edward 10% owner Purchase · Pre-Funded Warrants +242,945 $11.11 $2.7M 242,945
2026-03-10 Makhzoumi Mohamad 10% owner Purchase +207,100 $11.11 $2.3M 1,297,893
2026-03-10 Makhzoumi Mohamad 10% owner Purchase · Pre-Funded Warrants +242,945 $11.11 $2.7M 242,945
2026-03-10 Florence Anthony A. Jr. 10% owner Purchase +207,100 $11.11 $2.3M 1,297,893
2026-03-10 Florence Anthony A. Jr. 10% owner Purchase · Pre-Funded Warrants +242,945 $11.11 $2.7M 242,945
2026-02-02 Aiyar Ram President and CEO Grant or award +40,000 40,000
2026-02-02 Aiyar Ram President and CEO Grant or award · Stock Option (Right to Buy) +80,000 80,000
2026-02-02 Vincent Loic A Chief Scientific Officer Grant or award · Stock Option (Right to Buy) +35,000 35,000

Page 4 of 10 · 188 trades