Korro Bio (KRRO) stock: insider trades, news & valuation
Strong buyingShare price and insider trades
Korro Bio insider trading at a glance (Oct 9, 2026): in the past 12 months, 10 insiders bought $20.8M and 6 sold $5.7M of KRRO stock on the open market, including a cluster buy that began Mar 10, 2026.
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KRRO insider buying and selling by quarter
Open-market purchases (green, above the line) and sales (red, below), by trade date.
| Quarter | Bought | Purchases | Sold | Sales |
|---|---|---|---|---|
| Q4 2026 | — | 0 | — | 0 |
| Q3 2026 | $79K | 2 | $2.8M | 18 |
| Q2 2026 | — | 0 | $2.9M | 15 |
| Q1 2026 | $20.7M | 10 | — | 0 |
Valuation, profit and volume
Summary
Over the past 12 months, 10 Korro Bio, Inc. insiders reported open-market purchases totaling $20.8M, while 6 insiders reported sales totaling $5.7M. The most recent cluster buy began on Mar 10, 2026, when 9 insiders bought a combined $20.7M. Among insiders with enough purchase history to measure, Lynx1 Capital Management Lp (10% Owner) has the highest Insider Score at 89. 27 of 33 recorded sales were made under pre-scheduled Rule 10b5-1 trading plans, which are usually less informative than discretionary sales.
Insider transactions
Open-market purchases and sales.
| Filed | Insider | Type | Shares | Price | Value | Since | Score |
|---|---|---|---|---|---|---|---|
| Sep 15SEC | Jean Francois FormelaDirector | Sell Plan | 31,888640,610 held (−5%) | $14.12 | $450K | -28.0% | — |
| Sep 15SEC | Jean Francois FormelaDirector | Sell Plan | 8,450672,498 held (−1%) | $13.99 | $118K | -27.4% | — |
| Sep 15SEC | Jean Francois FormelaDirector | Sell Plan | 6,602132,650 held (−5%) | $14.12 | $93K | -28.0% | — |
| Sep 15SEC | Jean Francois FormelaDirector | Sell Plan | 1,750139,252 held (−1%) | $13.99 | $24K | -27.4% | — |
| Sep 14SEC | Oliver DolanPresident | Sell Plan | 516,241 held (−0%) | $13.72 | $69 | -25.9% | — |
| Sep 10SEC | Oliver DolanPresident | Sell Plan | 7,34716,252 held (−31%) | $13.51 | $99K | -24.8% | — |
| Sep 10SEC | Oliver DolanPresident | Sell Plan | 616,246 held (−0%) | $13.60 | $82 | -25.3% | — |
| Aug 28SEC | Jean Francois FormelaDirector | Sell Plan | 249680,948 held (−0%) | $13.96 | $3K | -27.2% | — |
| Aug 28SEC | Jean Francois FormelaDirector | Sell Plan | 51141,002 held (−0%) | $13.96 | $712 | -27.2% | — |
| Aug 21SEC | Jean Francois FormelaDirector | Sell Plan | 23,584681,197 held (−3%) | $14.00 | $330K | -27.4% | — |
| Aug 21SEC | Jean Francois FormelaDirector | Sell Plan | 4,884141,053 held (−3%) | $14.00 | $68K | -27.4% | — |
| Aug 13SEC | Lynx1 Capital Management Lp10% Owner | Buy | 5,2221,543,518 held (+0%) | $11.40 | $60K | -10.9% | 89 |
| Aug 13SEC | Jean Francois FormelaDirector | Sell Plan | 1,775704,781 held (−0%) | $13.96 | $25K | -27.2% | — |
| Aug 13SEC | Lynx1 Capital Management Lp10% Owner | Buy | 1,4621,544,980 held (+0%) | $13.19 | $19K | -23.0% | 89 |
| Aug 13SEC | Jean Francois FormelaDirector | Sell Plan | 368145,937 held (−0%) | $13.96 | $5K | -27.2% | — |
| Aug 5SEC | Ram AiyarCEO, President | Sell | 5,80269,046 held (−8%) | $10.84 | $63K | -6.3% | — |
| Jul 7SEC | Jean Francois FormelaDirector | Sell Plan | 85,955707,373 held (−11%) | $14.03 | $1.2M | -27.6% | — |
| Jul 7SEC | Jean Francois FormelaDirector | Sell Plan | 14,745154,811 held (−9%) | $14.03 | $207K | -27.6% | — |
| Jul 7SEC | Jean Francois FormelaDirector | Sell Plan | 8,506146,305 held (−5%) | $13.96 | $119K | -27.2% | — |
| Jul 7SEC | Jean Francois FormelaDirector | Sell Plan | 817706,556 held (−0%) | $13.96 | $11K | -27.2% | — |
| Jun 24SEC | Jean Francois FormelaDirector | Sell Plan | 101,579834,673 held (−11%) | $14.25 | $1.4M | -28.7% | — |
| Jun 24SEC | Jean Francois FormelaDirector | Sell Plan | 40,679793,994 held (−5%) | $14.60 | $594K | -30.4% | — |
| Jun 24SEC | Jean Francois FormelaDirector | Sell Plan | 17,426176,649 held (−9%) | $14.25 | $248K | -28.7% | — |
| Jun 24SEC | Jean Francois FormelaDirector | Sell Plan | 6,979169,670 held (−4%) | $14.60 | $102K | -30.4% | — |
| Jun 24SEC | Jean Francois FormelaDirector | Sell Plan | 3,382936,252 held (−0%) | $13.95 | $47K | -27.2% | — |
| Jun 24SEC | Jean Francois FormelaDirector | Sell Plan | 666793,328 held (−0%) | $14.98 | $10K | -32.2% | — |
| Jun 24SEC | Jean Francois FormelaDirector | Sell Plan | 580194,075 held (−0%) | $13.95 | $8K | -27.2% | — |
| Jun 24SEC | Jean Francois FormelaDirector | Sell Plan | 114169,556 held (−0%) | $14.98 | $2K | -32.2% | — |
| Jun 17SEC | Jeffrey CerioGeneral Counsel | Sell | 6,60935,293 held (−16%) | $10.83 | $72K | -6.2% | — |
| Jun 17SEC | Loic A VincentChief Scientific Officer | Sell | 3,41818,297 held (−16%) | $10.83 | $37K | -6.2% | — |
| Jun 17SEC | Oliver DolanPresident | Sell | 3,38318,099 held (−16%) | $10.83 | $37K | -6.2% | — |
| Jun 17SEC | Todd ChappellCOO | Sell | 3,16816,964 held (−16%) | $10.83 | $34K | -6.2% | — |
| Jun 2SEC | Ram AiyarCEO, President | Sell | 15,15274,848 held (−17%) | $12.98 | $197K | -21.7% | — |
| Jun 1SEC | Jean Francois FormelaDirector | Sell Plan | 2,441939,634 held (−0%) | $13.95 | $34K | -27.2% | — |
| Jun 1SEC | Jean Francois FormelaDirector | Sell Plan | 419194,655 held (−0%) | $13.95 | $6K | -27.2% | — |
| Apr 2SEC | Weston Nichols10% Owner | Buy | 5201,538,296 held (+0%) | $10.60 | $6K | -4.2% | 83 |
| Mar 12SEC | Anthony A. Florence Jr.10% Owner | Buy | 207,1001,297,893 held (+19%) | $11.11 | $2.3M | -8.6% | 23 |
| Mar 12SEC | Edward T Mathers10% Owner | Buy | 207,1001,297,893 held (+19%) | $11.11 | $2.3M | -8.6% | 23 |
| Mar 12SEC | Scott D Sandell10% Owner | Buy | 207,1001,297,893 held (+19%) | $11.11 | $2.3M | -8.6% | 23 |
| Mar 12SEC | Paul Edward Walker10% Owner | Buy | 207,1001,297,893 held (+19%) | $11.11 | $2.3M | -8.6% | 23 |
| Mar 12SEC | Forest Baskett10% Owner | Buy | 207,1001,297,893 held (+19%) | $11.11 | $2.3M | -8.6% | 23 |
| Mar 12SEC | Enterprise Associates 17, L.p. New10% Owner | Buy | 207,1001,297,893 held (+19%) | $11.11 | $2.3M | -8.6% | — |
| Mar 12SEC | Rick Yang10% Owner | Buy | 207,1001,297,893 held (+19%) | $11.11 | $2.3M | -8.6% | 23 |
| Mar 12SEC | Carmen Chang10% Owner | Buy | 207,1001,297,893 held (+19%) | $11.11 | $2.3M | -8.6% | 23 |
| Mar 12SEC | Mohamad Makhzoumi10% Owner | Buy | 207,1001,297,893 held (+19%) | $11.11 | $2.3M | -8.6% | 23 |
Insiders at Korro Bio, Inc.
| Insider | Bought | Sold | Last filing | Score |
|---|---|---|---|---|
| Anthony A. Florence Jr.10% Owner | $2.3M | — | Mar 12, 2026 | 23 |
| Edward T Mathers10% Owner | $2.3M | — | Mar 12, 2026 | 23 |
| Scott D Sandell10% Owner | $2.3M | — | Mar 12, 2026 | 23 |
| Paul Edward Walker10% Owner | $2.3M | — | Mar 12, 2026 | 23 |
| Forest Baskett10% Owner | $2.3M | — | Mar 12, 2026 | 23 |
| Enterprise Associates 17, L.p. New10% Owner | $2.3M | — | Mar 12, 2026 | — |
| Rick Yang10% Owner | $2.3M | — | Mar 12, 2026 | 23 |
| Carmen Chang10% Owner | $2.3M | — | Mar 12, 2026 | 23 |
| Mohamad Makhzoumi10% Owner | $2.3M | — | Mar 12, 2026 | 23 |
| Jean Francois FormelaDirector | — | $5.2M | Sep 15, 2026 | — |
| Ram AiyarCEO, President | — | $260K | Aug 5, 2026 | — |
| Lynx1 Capital Management Lp10% Owner | $79K | — | Aug 13, 2026 | 89 |
| Oliver DolanPresident | — | $136K | Sep 14, 2026 | — |
| Jeffrey CerioGeneral Counsel | — | $72K | Jun 17, 2026 | — |
| Loic A VincentChief Scientific Officer | — | $37K | Jun 17, 2026 | — |
| Todd ChappellCOO | — | $34K | Jun 17, 2026 | — |
| Weston Nichols10% Owner | $6K | — | Apr 2, 2026 | 83 |
KRRO stock: common questions
Are Korro Bio, Inc. insiders buying KRRO stock?
In the past 12 months, 10 insiders reported open-market purchases of KRRO worth $20.8M. The latest was 10% Owner Lynx1 Capital Management Lp bought $60K of KRRO at $11.40 — first open-market purchase in our records.
Are Korro Bio, Inc. insiders selling KRRO stock?
6 insiders reported sales worth $5.7M over the same period.
Where does this data come from?
Every transaction comes from Form 4 filings that insiders must submit to the SEC within two business days of a trade. We pull them from SEC EDGAR every night.
What is KRRO's 52-week range?
Over the past year KRRO has traded between $5.28 and $51.36. It last closed at $10.16 on Oct 9, 2026.