Weston Nichols insider trades: Korro Bio (KRRO) stock buys and sales
Trades on the price chart
Daily close, with an arrow on each day they bought or sold
Companies
Where Weston reports to the SEC
Open-market buys and sales
26 trades reported on SEC Form 4, newest first
| Date | Stock | Type | Shares | Price | Value | Holding | Reported |
|---|---|---|---|---|---|---|---|
| Oct 26, 2026 | KRRO | ↑ Buy | 79,809 | $11.09 | $885K | Indirect | Oct 26, 2026 (0d) |
| Aug 10, 2026 | KRRO | ↑ Buy | 6,684 | $11.79 | $79K | Indirect | Aug 13, 2026 (3d) |
| Jun 25, 2026 | PASG | ↑ Buy | 50,055 | $4.12 | $206K | Indirect | Jun 29, 2026 (4d) |
| Mar 31, 2026 | KRRO | ↑ Buy | 520 | $10.60 | $6K | Indirect | Apr 2, 2026 (2d) |
| Dec 23, 2025 | TCRX | ↑ Buy | 81,732 | $0.90 | $74K | Indirect | Dec 23, 2025 (0d) |
| Dec 19, 2025 | TCRX | ↑ Buy | 80,069 | $0.90 | $72K | Indirect | Dec 23, 2025 (4d) |
| Oct 28, 2025 | CGEM | ↑ Buy | 165,667 | $8.40 | $1.4M | Indirect | Oct 30, 2025 (2d) |
| Oct 21, 2025 | NEUP | ↑ Buy | 639,110 | $5.14 | $3.3M | Indirect | Oct 23, 2025 (2d) |
| Oct 17, 2025 | CGEM | ↑ Buy | 233,717 | $8.51 | $2.0M | Indirect | Oct 21, 2025 (4d) |
| Oct 14, 2025 | CGEM | ↑ Buy | 15,032 | $7.59 | $114K | Indirect | Oct 21, 2025 (7d) |
| Oct 10, 2025 | CGEM | ↑ Buy | 903,341 | $6.90 | $6.2M | Indirect | Oct 10, 2025 (0d) |
| Oct 8, 2025 | CGEM | ↑ Buy | 556,300 | $6.46 | $3.6M | Indirect | Oct 10, 2025 (2d) |
| Sep 15, 2025 | PASG | ↑ Buy | 31,683 | $6.99 | $221K | Indirect | Sep 15, 2025 (0d) |
| Sep 11, 2025 | PASG | ↑ Buy | 325 | $6.96 | $2K | Indirect | Sep 15, 2025 (4d) |
| Jul 24, 2025 | PASG | ↑ Buy | 115,725 | $5.72 | $662K | Indirect | Jul 24, 2025 (0d) |
| Jul 22, 2025 | PASG | ↑ Buy | 13,123 | $5.44 | $71K | Indirect | Jul 24, 2025 (2d) |
| May 20, 2025 | TCRX | ↑ Buy | 1,200,000 | $1.20 | $1.4M | Indirect | May 21, 2025 (1d) |
| May 19, 2025 | TCRX | ↑ Buy | 1,388,794 | $1.20 | $1.7M | Indirect | May 21, 2025 (2d) |
| Dec 27, 2024 | PASG | ↑ Buy | 373,645 | $0.65 | $241K | Indirect | Dec 31, 2024 (4d) |
| Dec 13, 2024 | TCRX | ↑ Buy | 100,000 | $2.90 | $290K | Indirect | Dec 16, 2024 (3d) |
| Dec 12, 2024 | TCRX | ↑ Buy | 31,800 | $3.01 | $96K | Indirect | Dec 16, 2024 (4d) |
| Nov 27, 2024 | PASG | ↑ Buy | 196,355 | $0.70 | $138K | Indirect | Nov 27, 2024 (0d) |
| Nov 25, 2024 | PASG | ↑ Buy | 259,998 | $0.56 | $147K | Indirect | Nov 27, 2024 (2d) |
| Nov 15, 2024 | TCRX | ↑ Buy | 947 | $4.34 | $4K | Indirect | Nov 19, 2024 (4d) |
| May 31, 2023 | TCRX | ↓ Sell | 15,400 | $2.52 | $39K | Indirect | Jun 2, 2023 (2d) |
| May 31, 2023 | TCRX | ↓ Sell | 10,000 | $2.51 | $25K | Indirect | Jun 2, 2023 (2d) |
Each row is one filing's trades in one stock, summed. Shares and prices are as filed, before any later stock split.
Other KRRO insiders
Open-market trades in the last 12 months
About Weston Nichols's insider trades
Weston Nichols is a 10% owner of Korro Bio (KRRO). Since May 31, 2023, Weston has reported 24 open-market purchases worth $22.9M and 2 sales worth $64K on SEC Form 4. In the last 12 months: 6 buys ($1.3M).
Their filings also include grants and awards (8 filings), other transactions (2 filings), shares returned to the company (1 filing). These aren't open-market trades and aren't counted above.
How to read insider trades
Officers, directors and owners of more than 10% of a company must report trades in its stock on SEC Form 4, usually within two business days. Purchases with their own money are the stronger signal: insiders sell for many reasons (taxes, diversification, a house), but buy for one. See every KRRO insider trade, the latest insider trades across the market, or cluster buys, when several insiders buy the same stock within days.