Edward T Mathers 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 Edward reports to the SEC
and 13 more companies
Open-market buys and sales
8 trades reported on SEC Form 4, newest first
| Date | Stock | Type | Shares | Price | Value | Holding | Reported |
|---|---|---|---|---|---|---|---|
| Mar 10, 2026 | KRRO | ↑ Buy | 207,100 | $11.11 | $2.3M | See Note 2 | Mar 12, 2026 (2d) |
| Oct 2, 2025 | NEUE | ↓ Sell | 3,355 | $6.75 | $23K | See Note 4 | Oct 6, 2025 (4d) |
| Oct 2, 2025 | NEUE | ↓ Sell | 280 | $6.75 | $2K | See Note 1 | Oct 6, 2025 (4d) |
| Sep 16, 2024 | MBX | ↑ Buy | 500,000 | $16.00 | $8.0M | See Note 2 | Sep 17, 2024 (1d) |
| Apr 22, 2024 | KRRO | ↑ Buy | 17,857 | $56.00 | $1000K | See Note 2 | Apr 24, 2024 (2d) |
| Jul 17, 2023 | SVRA | ↑ Buy | 333,333 | $3.00 | $1000K | See Note 2 | Jul 19, 2023 (2d) |
| Jun 28, 2021 | GLUE | ↑ Buy | 1,050,000 | $19.00 | $19.9M | See Note 2 | Jun 30, 2021 (2d) |
| Feb 3, 2006 | MEDI | ↓ Sell | 40,000 | $32.59 | $1.3M | Direct | Feb 7, 2006 (4d) |
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 Edward T Mathers's insider trades
Edward T Mathers is an insider at Korro Bio (KRRO). Since Feb 3, 2006, Edward has reported 5 open-market purchases worth $32.3M and 3 sales worth $1.3M on SEC Form 4. In the last 12 months: 1 buy ($2.3M).
Their filings also include grants and awards (64 filings), other transactions (11 filings), shares returned to the company (4 filings), option exercises (4 filings). 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.