Jane Chung bought $10k of STRO
Chief Executive Officer at SUTRO BIOPHARMA, INC.. 12,500 shares at an average of $0.80, traded Oct 15, 2025, filed Oct 16, 2025.
Score components
- +25RoleCEO
- 0Trade size$10k at market
- +3Relative to holdingsHoldings up 11%
- 0Price contextNo price history yet
- +15Cluster5 insiders buying within 14 days
- 0Repeat buyingFirst buy in 90 days
- 0Track recordToo few past buys to judge (0 with prices)
What happened after comparable buys
Same side and tier, against the S&P 500, at 1, 3 and 6 months. Shown to Pro users; the whole table is on the backtest page.
This signal so far: 1m +2.3%, 3m +48.5%, 6m +233.5%.
Price around the trade, and since
From a quarter before the trade to today. The arrow is the trade, the circle the day the filing reached EDGAR, which is the first day anyone outside could act; the dotted line is the S&P 500 rebased to that day's close.
Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value; the dashed line is the close on the filing day, the dotted line SPY rebased to it.Charts by TradingView Lightweight Charts™
Rows in this filing
Every transaction in Form 4 0001872398-25-000004, as filed. Open on EDGAR
| Date | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|
| Oct 15, 2025 | POpen-market purchase Common Stock | +12,500 | $0.80 | $10k | 122,850 | Oct 16, 2025 |
Related signals
Other insiders at SUTRO BIOPHARMA, INC. and this insider’s other filings.
| Score | Company | Insider | Value | Holdings | Filed |
|---|---|---|---|---|---|
| 45Moderate | SUTRO BIOPHARMA, INC. | Gregory K. Chow CFO | $16k 19,750 shares | - | |
| 36Weak | SUTRO BIOPHARMA, INC. | Hans-Peter Gerber CHIEF SCIENTIFIC OFFICER | $14k 17,000 shares | +31% | |
| 44Moderate | SUTRO BIOPHARMA, INC. | Connie Matsui director | $40k 50,000 shares | - | |
| 36Weak | SUTRO BIOPHARMA, INC. | David Pauling Chief Admin. Ofcr. & GC | $9,993 12,504 shares | +21% | |
| 0Weak | SUTRO BIOPHARMA, INC. | Nicki Vasquez CHIEF PORT. STRAT & ALNCE OFCR | $61k 12,185 shares | -49% |
Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.