Connie Matsui insider trades: Sutro Biopharma (STRO) stock buys and sales
Trades on the price chart
Daily close, with an arrow on each day they bought or sold
Companies
Where Connie reports to the SEC
Open-market buys and sales
10 trades reported on SEC Form 4, newest first
| Date | Stock | Type | Shares | Price | Value | Holding | Reported |
|---|---|---|---|---|---|---|---|
| Oct 15, 2025 | STRO | ↑ Buy | 50,000 | $0.80 | $40K | Direct | Oct 16, 2025 (1d) |
| Nov 5, 2021 | HALO | ↓ Sell | 32,000 | $40.38 | $1.3M | Direct | Nov 5, 2021 (0d) |
| Sep 11, 2020 | HALO | ↓ Sell | 32,000 | $27.06 | $866K | Direct | Sep 14, 2020 (3d) |
| May 4, 2020 | ARTL | ↑ Buy | 41,667 | $1.20 | $50K | Direct | May 4, 2020 (0d) |
| Jan 16, 2007 | BIIB | ↓ Sell | 24,823 | $50.83 | $1.3M | Direct | Jan 18, 2007 (2d) |
| Oct 16, 2006 | BIIB | ↓ Sell | 40,000 | $45.51 | $1.8M | Direct | Oct 18, 2006 (2d) |
| Jul 17, 2006 | BIIB | ↓ Sell | 40,000 | $42.66 | $1.7M | Direct | Jul 18, 2006 (1d) |
| Apr 28, 2006 | BIIB | ↓ Sell | 40,000 | $45.17 | $1.8M | Direct | May 2, 2006 (4d) |
| Oct 12, 2005 | BIIB | ↓ Sell | 38,771 | $36.49 | $1.4M | Direct | Dec 20, 2005 (69d) |
| Jul 12, 2005 | BIIB | ↓ Sell | 80,000 | $36.22 | $2.9M | by Trust | Jul 13, 2005 (1d) |
Each row is one filing's trades in one stock, summed. Shares and prices are as filed, before any later stock split.
About Connie Matsui's insider trades
Connie Matsui is an insider at Sutro Biopharma (STRO). Since Jul 12, 2005, Connie has reported 2 open-market purchases worth $90K and 8 sales worth $13.1M on SEC Form 4. There have been no open-market trades in the last 12 months.
Their filings also include grants and awards (38 filings), option exercises (8 filings), gifts (6 filings), other transactions (2 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 STRO insider trade, the latest insider trades across the market, or cluster buys, when several insiders buy the same stock within days.