Mark N. Tompkins is 10% Owner at Aeluma, Inc. (ALMU). They have made 46 open-market trades across 4 companies since 2017, most recently 2026-02-04.
CIK 0001455971
Unrated. We grade insiders only on stock they chose to buy on the open market. Grants, option exercises and vesting say nothing about timing, so they don't count — which is why someone can file often and still have no grade. It isn't a bad sign: unrated buys beat every graded tier below A.
6 open-market purchases totalling $2.2M since 2017, against 40 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| AKTS | 2,194,741 | $33.1M |
| ALMU | 1,790,488 | $14.3M |
| AMST | 2,078,925 | $1.8M |
| PrivateUnlisted | 1,891,667 | — |
| Total | $49.2M |
Shares reported on the most recent Form 4, priced at the 2026-02-05 close. 1 holding could not be priced and is excluded from the total.
Counted per filing, not per execution lot — a purchase filled in several tranches is one decision.
| 7d | 30d | 90d | |
|---|---|---|---|
| Accuracy | 55% | 66% | 63% |
| Avg Move | -2.2% | -5.9% | -7.9% |
| Scored | 38 | 38 | 38 |
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| ALMU | SELL | 2026-02-04 | 2026-02-05 | $14.71 | $508K | +11.7% | +8.1% | +99.5% |
| ALMU | SELL | 2026-01-29 | 2026-02-02 | $16.15 | $1.5M | -3.8% | +14.8% | +43.5% |
| ALMU | SELL | 2026-01-20 | 2026-01-22 | $19.14 | $2.0M | -9.0% | -10.6% | +21.2% |
| ALMU | SELL | 2025-12-23 | 2025-12-29 | $16.97 | $1.5M | +28.8% | -0.6% | -26.6% |
| ALMU | SELL | 2025-12-18 | 2025-12-22 | $14.68 | $1.2M | +30.4% | +26.4% | -12.0% |
| ALMU | SELL | 2025-12-09 | 2025-12-11 | $17.09 | $1.7M | -16.4% | +27.5% | -9.7% |
| ALMU | SELL | 2025-12-04 | 2025-12-09 | $16.08 | $2.7M | -16.9% | +28.1% | -11.7% |
| ALMU | SELL | 2025-10-17 | 2025-10-21 | $16.75 | $1.4M | +2.4% | -24.7% | +29.0% |
| ALMU | SELL | 2025-10-15 | 2025-10-17 | $20.09 | $2.5M | -4.9% | -23.9% | +28.4% |
| ALMU | SELL | 2025-10-10 | 2025-10-14 | $17.87 | $3.8M | -24.0% | -35.2% | +9.6% |
| ALMU | SELL | 2025-10-07 | 2025-10-09 | $17.20 | $3.1M | -2.0% | -6.8% | +17.3% |
| ALMU | SELL | 2025-10-02 | 2025-10-06 | $18.14 | $4.1M | +3.1% | -14.2% | +5.9% |
| ALMU | SELL | 2025-09-30 | 2025-10-06 | $16.18 | $547K | +3.1% | -14.2% | +5.9% |
| ALMU | SELL | 2025-09-29 | 2025-10-02 | $16.92 | $3.1M | +17.0% | -2.8% | +1.9% |
| ALMU | BUY | 2022-12-22 | 2023-01-13 | $3.00 | $250K | -12.6% | -7.0% | -7.0% |
| PrivateGuerrilla RF, Inc. | BUY | 2021-11-12 | 2021-11-16 | $2.00 | $500K | N/A | N/A | N/A |
| PrivateAeluma, Inc. | BUY | 2021-06-22 | 2021-06-29 | $2.00 | $715K | N/A | N/A | N/A |
| AMST | SELL | 2021-05-28 | 2021-06-02 | $2.46 | $131K | +19.8% | -1.7% | -16.9% |
| AMST | SELL | 2021-05-25 | 2021-05-27 | $2.29 | $160K | -7.1% | +8.0% | -19.3% |
| AMST | SELL | 2021-05-20 | 2021-05-24 | $2.21 | $280K | +3.6% | +15.8% | -19.4% |
| AMST | SELL | 2021-05-17 | 2021-05-19 | $2.22 | $151K | +14.5% | +16.7% | -16.3% |
| AMST | SELL | 2021-05-12 | 2021-05-14 | $2.32 | $466K | -1.3% | +21.8% | -8.4% |
| AMST | SELL | 2021-05-07 | 2021-05-11 | $2.51 | $92K | -5.0% | +19.4% | -8.2% |
| AMST | SELL | 2021-05-04 | 2021-05-06 | $2.90 | $372K | -15.1% | -13.6% | -19.4% |
| AMST | SELL | 2021-04-29 | 2021-05-03 | $2.73 | $245K | -29.8% | -20.2% | -31.7% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.