Mark N. Tompkins insider trades: Aeluma (ALMU) stock buys and sales
Trades on the price chart
Daily close, with an arrow on each day they bought or sold
Companies
Where Mark reports to the SEC
Open-market buys and sales
48 trades reported on SEC Form 4, newest first
| Date | Stock | Type | Shares | Price | Value | Holding | Reported |
|---|---|---|---|---|---|---|---|
| Feb 4, 2026 | ALMU | ↓ Sell | 34,500 | $14.71 | $508K | Direct | Feb 5, 2026 (1d) |
| Feb 2, 2026 | ALMU | ↓ Sell | 95,000 | $16.15 | $1.5M | Direct | Feb 2, 2026 (0d) |
| Jan 22, 2026 | ALMU | ↓ Sell | 105,000 | $19.14 | $2.0M | Direct | Jan 22, 2026 (0d) |
| Dec 22, 2025 | ALMU | ↓ Sell | 85,000 | $14.68 | $1.2M | Direct | Dec 22, 2025 (0d) |
| Dec 10, 2025 | ALMU | ↓ Sell | 50,000 | $17.09 | $854K | Direct | Dec 11, 2025 (1d) |
| Dec 8, 2025 | ALMU | ↓ Sell | 100,000 | $16.08 | $1.6M | Direct | Dec 9, 2025 (1d) |
| Oct 20, 2025 | ALMU | ↓ Sell | 77,500 | $16.67 | $1.3M | Direct | Oct 21, 2025 (1d) |
| Oct 16, 2025 | ALMU | ↓ Sell | 65,000 | $20.09 | $1.3M | Direct | Oct 17, 2025 (1d) |
| Oct 14, 2025 | ALMU | ↓ Sell | 107,186 | $17.87 | $1.9M | Direct | Oct 14, 2025 (0d) |
| Oct 9, 2025 | ALMU | ↓ Sell | 106,908 | $17.25 | $1.8M | Direct | Oct 9, 2025 (0d) |
| Oct 6, 2025 | ALMU | ↓ Sell | 129,751 | $18.00 | $2.3M | Direct | Oct 6, 2025 (0d) |
| Oct 1, 2025 | ALMU | ↓ Sell | 109,080 | $16.82 | $1.8M | Direct | Oct 2, 2025 (1d) |
| Aug 26, 2025 | NONE | ↓ Sell | 50,000 | $0.00 | $5 | Direct | Aug 28, 2025 (2d) |
| Aug 26, 2025 | NONE | ↓ Sell | 25,000 | $0.00 | $3 | Direct | Aug 28, 2025 (2d) |
| Jul 16, 2025 | NONE | ↓ Sell | 25,000 | $0.00 | $3 | Direct | Jul 18, 2025 (2d) |
| Dec 22, 2022 | ALMU | ↑ Buy | 83,333 | $3.00 | $250K | Direct | Jan 13, 2023 (22d) |
| Nov 12, 2021 | N | ↑ Buy | 250,000 | $2.00 | $500K | Direct | Nov 16, 2021 (4d) |
| Jun 25, 2021 | NONE | ↑ Buy | 357,500 | $2.00 | $715K | Direct | Jun 29, 2021 (4d) |
| Jun 1, 2021 | AMST | ↓ Sell | 53,316 | $2.46 | $131K | Direct | Jun 2, 2021 (1d) |
| May 27, 2021 | AMST | ↓ Sell | 47,497 | $2.30 | $109K | Direct | May 27, 2021 (0d) |
| May 24, 2021 | AMST | ↓ Sell | 69,871 | $2.22 | $155K | Direct | May 24, 2021 (0d) |
| May 19, 2021 | AMST | ↓ Sell | 68,225 | $2.22 | $151K | Direct | May 19, 2021 (0d) |
| May 14, 2021 | AMST | ↓ Sell | 107,424 | $2.31 | $248K | Direct | May 14, 2021 (0d) |
| May 11, 2021 | AMST | ↓ Sell | 36,622 | $2.51 | $92K | Direct | May 11, 2021 (0d) |
| May 6, 2021 | AMST | ↓ Sell | 76,133 | $2.86 | $218K | Direct | May 6, 2021 (0d) |
| May 3, 2021 | AMST | ↓ Sell | 61,058 | $2.74 | $167K | Direct | May 3, 2021 (0d) |
| Apr 28, 2021 | AMST | ↓ Sell | 28,419 | $2.95 | $84K | Direct | Apr 28, 2021 (0d) |
| Apr 16, 2021 | AMST | ↓ Sell | 35,627 | $3.10 | $111K | Direct | Apr 20, 2021 (4d) |
| Apr 14, 2021 | AMST | ↓ Sell | 54,083 | $3.31 | $179K | Direct | Apr 14, 2021 (0d) |
| Apr 9, 2021 | AMST | ↓ Sell | 54,450 | $3.57 | $194K | Direct | Apr 9, 2021 (0d) |
| Apr 6, 2021 | AMST | ↓ Sell | 77,828 | $4.19 | $326K | Direct | Apr 7, 2021 (1d) |
| Apr 1, 2021 | AMST | ↓ Sell | 86,511 | $4.21 | $364K | Direct | Apr 1, 2021 (0d) |
| Mar 5, 2021 | AMST | ↓ Sell | 20,000 | $5.62 | $112K | Direct | Mar 5, 2021 (0d) |
| Sep 29, 2020 | AMST | ↑ Buy | 20,000 | $5.00 | $100K | Direct | Sep 29, 2020 (0d) |
| Feb 12, 2020 | NONE | ↑ Buy | 25,000 | $4.00 | $100K | Direct | Feb 14, 2020 (2d) |
| Sep 6, 2018 | NONE | ↓ Sell | 50,000 | $0.08 | $4K | Direct | Sep 6, 2018 (0d) |
| Dec 28, 2017 | AKTS | ↓ Sell | 30,581 | $6.14 | $188K | Direct | Dec 29, 2017 (1d) |
| Dec 22, 2017 | AKTS | ↓ Sell | 12,500 | $6.28 | $79K | Direct | Dec 27, 2017 (5d) |
| Dec 21, 2017 | AKTS | ↓ Sell | 10,000 | $6.27 | $63K | Direct | Dec 22, 2017 (1d) |
| Dec 20, 2017 | AKTS | ↓ Sell | 24,513 | $6.26 | $153K | Direct | Dec 21, 2017 (1d) |
| Sep 28, 2017 | AKTS | ↓ Sell | 22,955 | $6.84 | $157K | Direct | Sep 29, 2017 (1d) |
| Sep 26, 2017 | NONE | ↑ Buy | 166,667 | $3.00 | $500K | Direct | Sep 28, 2017 (2d) |
| Sep 21, 2017 | AKTS | ↓ Sell | 25,291 | $7.50 | $190K | Direct | Sep 22, 2017 (1d) |
| Sep 12, 2017 | AKTS | ↓ Sell | 11,676 | $6.66 | $78K | Direct | Sep 14, 2017 (2d) |
| Sep 11, 2017 | AKTS | ↓ Sell | 48,230 | $6.83 | $329K | Direct | Sep 12, 2017 (1d) |
| Sep 7, 2017 | AKTS | ↓ Sell | 15,800 | $7.30 | $115K | Direct | Sep 8, 2017 (1d) |
| Jul 10, 2017 | AKTS | ↓ Sell | 10,000 | $8.60 | $86K | Direct | Jul 12, 2017 (2d) |
| Jun 15, 2017 | NONE | ↑ Buy | 35,000 | $0.03 | $875 | Direct | Jun 19, 2017 (4d) |
Each row is one filing's trades in one stock, summed. Shares and prices are as filed, before any later stock split.
Other ALMU insiders
Open-market trades in the last 12 months
About Mark N. Tompkins's insider trades
Mark N. Tompkins is an insider at Aeluma (ALMU). Since Jun 15, 2017, Mark has reported 7 open-market purchases worth $2.2M and 41 sales worth $22.4M on SEC Form 4. In the last 12 months: 6 sales ($7.8M).
Their filings also include other transactions (10 filings), grants and awards (4 filings), conversions (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 ALMU insider trade, the latest insider trades across the market, or cluster buys, when several insiders buy the same stock within days.