Korro Bio, Inc. (KRRO)
Nasdaq: KRRO · Pharmaceutical Preparations · Cambridge, MA · filing with the SEC since 2017
Who owns Korro Bio, Inc.
As filed with the SECHolders of 5% or more
5
Lynx1 Capital Management LP holds 10.7% of Common Stock, par value $0.001 per share, as its SCHEDULE 13G/A filed Apr 2, 2026 says.
Directors and officers
11
report now, of 30 people on the record since 2019. Their holdings as a group are not read here.
Institutions as a whole
n/a
The record does not read the share held by managers that file Form 13F, so none is printed and no split of the rest is estimated. What it holds is the 5 named at left.
Holders of 5% or moreshare of the class, as filed
Lynx1 Capital Management LP
SCHEDULE 13G/A · filed Apr 2, 2026 · Common Stock, par value $0.001 per share · 7.8% in Jan 5, 2026
Venrock Healthcare Capital Partners III, L.P.
SCHEDULE 13G · filed Mar 17, 2026 · Common Stock, par value $0.001 per share
New Enterprise Associates 17, L.P.
SCHEDULE 13D/A · filed Mar 12, 2026 · Common Stock, par value $0.001 per share
Balyasny Asset Management L.P.
SCHEDULE 13G/A · filed Aug 14, 2026 · Common Stock
Nantahala Capital Management, LLC
SCHEDULE 13G · filed Feb 13, 2026 · Common Stock, par value $0.001 per share
Blackrock, Inc.
SCHEDULE 13G/A · filed Oct 27, 2026 · Common Stock · reported falling below 5%, from 5.2% in Jul 29, 2026
Atlas Venture Fund XI, L.P.
SCHEDULE 13D/A · filed Aug 4, 2026 · Common Stock, par value $0.001 per share · reported falling below 5%
Citadel Advisors LLC
SCHEDULE 13G/A · filed Feb 14, 2025 · Common Stock, par value $0.001 per share (the "Shares") · reported falling below 5%
Deep Track Capital, LP
SCHEDULE 13G/A · filed Aug 14, 2025 · Common stock, par value $0.001 per share · reported falling below 5%
Point72 Biotech Private Investments, LLC
SCHEDULE 13G/A · filed May 15, 2026 · Common Stock, par value $0.001 per share · reported falling below 5%, from 5.7% in Mar 11, 2026
Fmr LLC
SCHEDULE 13G/A · filed Feb 5, 2026 · COMMON STOCK · reported falling below 5%
AllianceBernstein L.P.
SCHEDULE 13G/A · filed Aug 13, 2025 · Common Stock · reported falling below 5%, from 7.5% in Feb 5, 2025
The Vanguard Group
SCHEDULE 13G/A · filed Mar 27, 2026 · Common Stock · reported falling below 5%, from 5.19% in Jan 30, 2026
Driehaus Capital Management LLC
SCHEDULE 13G/A · filed Feb 17, 2026 · Common Stock · reported falling below 5%, from 7.16% in Nov 14, 2025
What KRRO reports owning in othersstakes of 5% or more, and other ties
Other ties the annual report names
Korros
An entity · legal entity · owns, named in the 10-K filed Mar 12, 2026
3 subsidiaries in 2 countries, from the list filed with the 10-K filed Mar 18, 2025.
Insider tradesForm 4
33sales
0purchases
27sales on a scheduled plan
6people selling
$5.7Msold, in dollars
$0bought, in dollars
Open-market trades on Form 4 from Oct 26, 2025 to Oct 26, 2026. A scheduled plan is a selling program set in advance under SEC rule 10b5-1. The trades are listed as filed and do not feed the grade.
By calendar yearSoldBought
2026 runs to Oct 26, 2026. Dollars as filed, summed by the transaction date.
People who traded in the window17 of 50 on the roster
| Person | Role as filed | Sales | Sold | On a plan | Buys | Bought |
|---|---|---|---|---|---|---|
| Formela Jean Francois | director | 24 | $5.2M | 24 | 0 | $0 |
| Aiyar Ram | President and CEO | 2 | $300,000 | 0 | 0 | $0 |
| Dolan Oliver | Senior Vice President, Finance | 4 | $100,000 | 3 | 0 | $0 |
| Cerio Jeffrey | General Counsel | 1 | $100,000 | 0 | 0 | $0 |
| Lynx1 Capital Management LP | 10% owner | 0 | $0 | 0 | 6 | $1.0M |
| Nichols Weston | 10% owner | 0 | $0 | 0 | 1 | $0 |
| Baskett Forest | 10% owner | 0 | $0 | 0 | 1 | $2.3M |
| Chang Carmen | 10% owner | 0 | $0 | 0 | 1 | $2.3M |
| Florence Anthony A. Jr. | 10% owner | 0 | $0 | 0 | 1 | $2.3M |
| Makhzoumi Mohamad | 10% owner | 0 | $0 | 0 | 1 | $2.3M |
| Mathers Edward T | 10% owner | 0 | $0 | 0 | 1 | $2.3M |
| New Enterprise Associates 17, L.P. | 10% owner | 0 | $0 | 0 | 1 | $2.3M |
| Sandell Scott D | 10% owner | 0 | $0 | 0 | 1 | $2.3M |
| Walker Paul Edward | 10% owner | 0 | $0 | 0 | 1 | $2.3M |
| Yang Rick | 10% owner | 0 | $0 | 0 | 1 | $2.3M |
| Chappell Todd | Chief Operating Officer | 1 | $0 | 0 | 0 | $0 |
| Vincent Loic A | Chief Scientific Officer | 1 | $0 | 0 | 0 | $0 |