Mark N. Tompkins sold $854k of ALMU
owner at Aeluma, Inc.. 50,000 shares at an average of $17.09, traded Dec 9, 2025, filed Dec 11, 2025.
Score components
- +12Role10% owner
- +23Trade size$854k at market
- 0Share of holdings soldSold 2.3% of holdings
- 0ClusterNo other insider selling within 14 days
What happened after comparable sells
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.
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 0001213900-25-120879, as filed. Open on EDGAR
| Date | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|
| Dec 9, 2025 | SOpen-market sale Common Stock | -10,861 | $16.39 | $178k | 2,209,127 | Dec 11, 2025 |
| Dec 9, 2025 | SOpen-market sale Common Stock | -19,139 | $17.06 | $327k | 2,189,988 | Dec 11, 2025 |
| Dec 10, 2025 | SOpen-market sale Common Stock | -20,000 | $17.49 | $350k | 2,169,988 | Dec 11, 2025 |
Related signals
Other insiders at Aeluma, Inc. and this insider’s other filings.
| Score | Company | Insider | Value | Holdings | Filed |
|---|---|---|---|---|---|
| 30Weak | Aeluma, Inc. | Jonathan Klamkin Chief Executive Officer | $1.3M 100,000 shares | -8% | |
| 37Weak | Aeluma, Inc. | Jonathan Klamkin Chief Executive Officer | $903k 50,000 shares | -3% | |
| 19Weak | Aeluma, Inc. | Steven Denbaars director | $418k 25,000 shares | -6% | |
| 36Weak | ALMUsell Aeluma, Inc. | Mark N. Tompkins other | $508k 34,500 shares | -2% | |
| 37Weak | ALMUsell Aeluma, Inc. | Mark N. Tompkins owner | $1.5M 95,000 shares | -5% | |
| 37Weak | ALMUsell Aeluma, Inc. | Mark N. Tompkins owner | $2.0M 105,000 shares | -5% | |
| 32Weak | ALMUsell Aeluma, Inc. | Lee McCarthy owner | $3,962 649,570 shares | -40% | |
| 37Weak | ALMUsell Aeluma, Inc. | Mark N. Tompkins owner | $997k 60,000 shares | -3% | |
| 37Weak | ALMUsell Aeluma, Inc. | Mark N. Tompkins owner | $1.2M 85,000 shares | -4% | |
| 37Weak | ALMUsell Aeluma, Inc. | Mark N. Tompkins owner | $1.6M 100,000 shares | -4% |
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.