Company · KRRO
Korro Bio, Inc.
Nasdaq's symbol directory lists KRRO on Nasdaq as “Korro Bio, Inc. - Common Stock”.
In the 12 months to Nov 8, 2026: insiders bought on 5 occasions ($964K); insiders sold on 18 occasions ($5.5M); 6 planned-sale notices; 4 filings by holders of 5% or more; 3 company reports (Form 8-K, since May 26, 2026).
Insider trades · SEC Form 4
Those inside the hall
Open-market purchases and sales only. Legs one person filed for one day are combined.
Who traded
- FORMELA JEAN FRANCOIS sold $5.1M
- Lynx1 Capital Management LP bought $964K
- Dolan Oliver, Senior Vice President, Finance sold $136K
- Cerio Jeffrey, General Counsel sold $72K
- Aiyar Ram, President and CEO sold $63K
- Vincent Loic A, Chief Scientific Officer sold $37K
- Chappell Todd, Chief Operating Officer sold $34K
Every trade (23)
- BUYLynx1 Capital Management LP bought $295K
- BUYLynx1 Capital Management LP bought $30K
- BUYLynx1 Capital Management LP bought $559K
- SELLFORMELA JEAN FRANCOIS sold $543K
- SELLFORMELA JEAN FRANCOIS sold $143K
- SELLDolan Oliver, Senior Vice President, Finance sold $69
- SELLDolan Oliver, Senior Vice President, Finance sold $82
- SELLDolan Oliver, Senior Vice President, Finance sold $99K
- SELLFORMELA JEAN FRANCOIS sold $4K
- SELLFORMELA JEAN FRANCOIS sold $399K
- SELLFORMELA JEAN FRANCOIS sold $30K
- BUYLynx1 Capital Management LP bought $19K
- BUYLynx1 Capital Management LP bought $60K
- SELLAiyar Ram, President and CEO sold $63K
- SELLFORMELA JEAN FRANCOIS sold $130K
- SELLFORMELA JEAN FRANCOIS sold $1.4M
- SELLFORMELA JEAN FRANCOIS sold $707K
- SELLFORMELA JEAN FRANCOIS sold $1.7M
- SELLFORMELA JEAN FRANCOIS sold $55K
- SELLCerio Jeffrey, General Counsel sold $72K
- SELLVincent Loic A, Chief Scientific Officer sold $37K
- SELLDolan Oliver, Senior Vice President, Finance sold $37K
- SELLChappell Todd, Chief Operating Officer sold $34K
Planned sales · SEC Form 144
Notice given
A Form 144 is filed before an insider sells restricted stock. It states an intent; the sale, if it happens, appears later on a Form 4. Every recent notice
- Atlas Venture Fund XI, L.P. $440K
- Atlas Venture Opportunity Fund II, L.P. $91K
- Atlas Venture Fund XI, L.P. $110K
- Atlas Venture Opportunity Fund II, L.P. $23K
- Dolan Oliver $69
- Dolan Oliver $82
Large holders · SEC Schedules 13D and 13G
Five percent and over
Anyone who comes to hold more than 5% of a company's voting shares must tell the SEC. A Schedule 13D is filed by a holder who may seek to influence the company; a 13G by one who states it is a passive investor. An amendment updates an earlier filing, and a stake reported as 0% means the holder says it has sold all, or nearly all, of its shares. Every recent 13D and 13G
- BlackRock, Inc. 4.9%
- BALYASNY ASSET MANAGEMENT L.P. 6.6%
- Atlas Venture Fund XI, L.P. 4.9%
- BlackRock, Inc. 5.2%
Company reports · SEC Form 8-K
In its own words
Current reports the company filed with the SEC; most items are due within four business days of the event. Each line lists the report's items by the SEC's own titles; the filing says what happened. Reports collected since May 26, 2026; every 8-K at the SEC.
- Termination of a material definitive agreement; Results of operations and financial condition Nov 5, 2026
- Other events Oct 22, 2026
- Other events Oct 5, 2026
Sources: SEC EDGAR (Forms 4, 144 and 8-K) and STOCK Act periodic transaction reports. Filings can be late, amended or wrong at the source; see methodology.