KRRO · Insider trading · 13F holders · Congress trades
Korro Bio, Inc. (KRRO)
Who is buying and selling KRRO: company insiders on SEC Form 4, hedge funds and superinvestors on Form 13F, and members of Congress under the STOCK Act. Every figure links to the filing or page it comes from.
- 13F filers holding
- 7
- Insider buys, 90 days
- $964K
- Insider sales, 90 days
- $1.3M
- Congress trades, 12 months
- 0
KRRO at a glance
- Between Aug 1, 2026 and Oct 29, 2026, 4 KRRO insiders filed 2 open-market purchases worth $964K and 7 sales worth $1.3M on SEC Form 4; 6 of the sales were pre-planned under Rule 10b5-1.
- 7 13F filers hold KRRO among their 50 largest positions, worth $72.9M combined. The biggest bets by portfolio weight are Lynx1 Capital Management LP (2.3%), NEA Management Company, LLC (1.1%) and Venrock Adviser, LLC (0.4%).
- No member of Congress has disclosed a trade in KRRO.
- KRRO last closed at $14.20 on Oct 29, 2026.
KRRO insider trading
Between Aug 1, 2026 and Oct 29, 2026, 4 KRRO insiders filed 2 open-market purchases worth $964K and 7 sales worth $1.3M on SEC Form 4; 6 of the sales were pre-planned under Rule 10b5-1.
| Filed | Insider | Role | Trade | Shares | Price | Value | Form 4 |
|---|---|---|---|---|---|---|---|
| Oct 26, 2026 | Lynx1 Capital Management LP | 10% Owner | Buy | 79,809 | $11.09 | $885K | SEC |
| Sep 15, 2026 | Formela Jean Francois | Director | Sale10b5-1 | 48,690 | $14.09 | $686K | SEC |
| Sep 14, 2026 | Dolan Oliver | Senior Vice President, Finance | Sale10b5-1 | 5 | $13.72 | $68.58 | SEC |
| Sep 10, 2026 | Dolan Oliver | Senior Vice President, Finance | Sale10b5-1 | 7,353 | $13.51 | $99K | SEC |
| Aug 28, 2026 | Formela Jean Francois | Director | Sale10b5-1 | 300 | $13.96 | $4K | SEC |
| Aug 21, 2026 | Formela Jean Francois | Director | Sale10b5-1 | 28,468 | $14.00 | $399K | SEC |
| Aug 13, 2026 | Lynx1 Capital Management LP | 10% Owner | Buy | 6,684 | $11.79 | $79K | SEC |
| Aug 13, 2026 | Formela Jean Francois | Director | Sale10b5-1 | 2,143 | $13.96 | $30K | SEC |
| Aug 5, 2026 | Aiyar Ram | President and CEO, Director | Sale | 5,802 | $10.84 | $63K | SEC |
Who owns KRRO? Hedge funds and superinvestors
7 13F filers hold KRRO among their 50 largest positions, worth $72.9M combined. The biggest bets by portfolio weight are Lynx1 Capital Management LP (2.3%), NEA Management Company, LLC (1.1%) and Venrock Adviser, LLC (0.4%).
| Manager | % of portfolio | Value | Shares | Last quarter | 13F |
|---|---|---|---|---|---|
| Lynx1 Capital Management LPHedge fund | 2.3% | $20.3M | 1,538,296 | +0.0% shares | Q2 2026 |
| NEA Management Company, LLCHedge fund | 1.1% | $17.1M | 1,297,893 | +0.0% shares | Q2 2026 |
| Venrock Adviser, LLCHedge fund | 0.4% | $13.3M | 1,009,500 | +0.0% shares | Q2 2026 |
| Atlas Venture Life Science Advisors, LLCVenture capital | 1.4% | $12.7M | 962,884 | -15.3% shares | Q2 2026 |
| TCG Crossover Management, LLCHedge fund | 0.1% | $5.5M | 416,301 | +0.0% shares | Q2 2026 |
| 72 Investment Holdings, LLCInvestment manager | 7.3% | $3.6M | 276,831 | +0.0% shares | Q2 2026 |
| AIHC Capital Management LtdHedge fund | 0.3% | $343K | 30,265 | +0.0% shares | Q1 2026 |
Each manager counts with its latest 13F (Q2 2026: 6, Q1 2026: 1). Screen KRRO in the grand portfolio →
KRRO stock trades by members of Congress
No member of Congress has disclosed a trade in KRRO.
Analysis mentioning KRRO
Posts from the blog that cover Korro Bio, Inc., newest first.
KRRO questions and answers
Are insiders buying KRRO stock?
Between Aug 1, 2026 and Oct 29, 2026, 4 KRRO insiders filed 2 open-market purchases worth $964K and 7 sales worth $1.3M on SEC Form 4; 6 of the sales were pre-planned under Rule 10b5-1.
Which hedge funds own KRRO?
7 13F filers hold KRRO among their 50 largest positions, worth $72.9M combined. The biggest bets by portfolio weight are Lynx1 Capital Management LP (2.3%), NEA Management Company, LLC (1.1%) and Venrock Adviser, LLC (0.4%).
Has Congress traded KRRO?
No member of Congress has disclosed a trade in KRRO.
Who is the largest holder of KRRO?
Among 13F filers, Lynx1 Capital Management LP reports the largest KRRO position, $20.3M (1,538,296 shares) in its Q2 2026 13F. The biggest bet by portfolio weight is Lynx1 Capital Management LP's: 2.3% of its portfolio.
Cite or share this
Free to use with a link back. The data updates every filing day.