Rainer M Erdtmann bought $55k of BMEA
See Remarks at Biomea Fusion, Inc.. 50,000 shares at an average of $1.09, traded Nov 28, 2025, filed Dec 2, 2025.
Score components
- +15RoleOfficer
- +7Trade size$55k at market
- +3Relative to holdingsHoldings up 8%
- 0Price contextNo price history yet
- +8Cluster2 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 +29.6%, 3m +39.0%, 6m +43.2%.
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 0001193125-25-305287, as filed. Open on EDGAR
| Date | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|
| Nov 28, 2025 | POpen-market purchase Common Stock | +40,000 | $1.10 | $44k | 683,027 | Dec 2, 2025 |
| Dec 1, 2025 | POpen-market purchase Common Stock | +10,000 | $1.05 | $11k | 693,027 | Dec 2, 2025 |
Related signals
Other insiders at Biomea Fusion, Inc. and this insider’s other filings.
| Score | Company | Insider | Value | Holdings | Filed |
|---|---|---|---|---|---|
| 34Weak | Biomea Fusion, Inc. | Rainer M Erdtmann See Remarks | $43k 30,000 shares | +4% | |
| 53Moderate | Biomea Fusion, Inc. | Michael J.M. Hitchcock Interim CEO | $99k 100,000 shares | +667% | |
| 53Moderate | BMEAbuy Biomea Fusion, Inc. | Franco Valle Chief Financial Officer | $55k 12,509 shares | +42% |
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.