ALMU insider buying and SEC filings, explained
Aeluma, Inc. · CIK 1828805
Tracked: Forms 3/4/5, 8-K, NT · All filings on sec.gov
Insider activity in the last 12 months
Bought
$0
Insiders who bought
0
Sold (not marked 10b5-1)
$8.8M
Planned sales (10b5-1)
$6.6M
Insider purchases and sales, last 12 months
| Traded | Type | What was filed | Source |
|---|---|---|---|
| Oct 12, 2026 | Planned (10b5-1) | Jonathan Klamkin (CEO and Director) sold 100,000 shares indirectly (by trust) at about $10.53 ($1.1M), marked as a 10b5-1 plan trade. Holdings by trust down 8% to 1,126,995 shares. | SEC filing Filed Oct 14, 2026, 4:08 PM ET |
| Sep 21, 2026 | Planned (10b5-1) | Jonathan Klamkin (CEO and Director) sold 100,000 shares indirectly (by trust) at about $13.35 ($1.3M), marked as a 10b5-1 plan trade. Holdings by trust down 8% to 1,226,995 shares. | SEC filing Filed Sep 23, 2026 |
| Aug 26–27, 2026 | Planned (10b5-1) Amended filing | Steven Denbaars (Director) sold 25,000 shares between Aug 26 and Aug 27 at about $13.83 ($346K), marked as a 10b5-1 plan trade. Holdings down 7% to 345,209 shares. This amends a filing from Aug 28. | SEC filing Filed Aug 28, 2026 |
| Aug 3, 2026 | Planned (10b5-1) | Jonathan Klamkin (CEO and Director) sold 20,000 shares at about $16.73 ($335K), marked as a 10b5-1 plan trade. Holdings down 89% to 2,403 shares. | SEC filing Filed Aug 5, 2026 |
| Jul 1, 2026 | Planned (10b5-1) | Jonathan Klamkin (CEO and Director) sold 20,000 shares at about $21.08 ($422K), marked as a 10b5-1 plan trade. Holdings down 89% to 2,403 shares. | SEC filing Filed Jul 2, 2026 |
| Jun 1, 2026 | Planned (10b5-1) | Jonathan Klamkin (CEO and Director) sold 20,000 shares at about $25.04 ($501K), marked as a 10b5-1 plan trade. Holdings down 89% to 2,403 shares. | SEC filing Filed Jun 3, 2026 |
| May 19–20, 2026 | Planned (10b5-1) | Steven Denbaars (Director) sold 25,000 shares between May 19 and May 20 at about $20.23 ($506K), marked as a 10b5-1 plan trade. Holdings down 6% to 370,209 shares. | SEC filing Filed May 21, 2026 |
| May 1, 2026 | Planned (10b5-1) | Jonathan Klamkin (CEO and Director) sold 20,000 shares at about $24.96 ($499K), marked as a 10b5-1 plan trade. Holdings down 89% to 2,403 shares. | SEC filing Filed May 5, 2026 |
| Apr 1, 2026 | Planned (10b5-1) | Jonathan Klamkin (CEO and Director) sold 20,000 shares at about $13.10 ($262K), marked as a 10b5-1 plan trade. Holdings down 1% to 1,409,398 shares. | SEC filing Filed Apr 3, 2026 |
| Mar 4, 2026 | Planned (10b5-1) | Jonathan Klamkin (CEO and Director) sold 50,000 shares at about $18.05 ($902K), marked as a 10b5-1 plan trade. Holdings down 3% to 1,429,398 shares. | SEC filing Filed Mar 5, 2026 |
| Feb 25–26, 2026 | Planned (10b5-1) | Steven Denbaars (Director) sold 25,000 shares between Feb 25 and Feb 26 at about $16.72 ($418K), marked as a 10b5-1 plan trade. Holdings down 6% to 385,088 shares. | SEC filing Filed Feb 27, 2026 |
| Feb 4, 2026 | Sale | Mark N. Tompkins (Former 10% Owner) sold 34,500 shares at about $14.71 ($508K). Holdings down 2% to 1,790,488 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Feb 5, 2026 |
| Jan 29–Feb 2, 2026 | Sale | Mark N. Tompkins (10% owner) sold 95,000 shares between Jan 29 and Feb 2 at about $16.15 ($1.5M). Holdings down 5% to 1,824,988 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Feb 2, 2026 |
| Jan 20–22, 2026 | Sale | Mark N. Tompkins (10% owner) sold 105,000 shares between Jan 20 and Jan 22 at about $19.14 ($2.0M). Holdings down 5% to 1,919,988 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Jan 22, 2026 |
| Feb 17, 2023 | Sale | Lee McCarthy (10% owner) sold 649,570 shares at $0.0100 ($6K). Holdings down 40% to 977,425 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Jan 2, 2026 |
| Dec 23–26, 2025 | Sale | Mark N. Tompkins (10% owner) sold 60,000 shares between Dec 23, 2025 and Dec 26, 2025 at about $16.62 ($997K). Holdings down 3% to 2,024,988 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Dec 29, 2025 |
| Dec 18–22, 2025 | Sale | Mark N. Tompkins (10% owner) sold 85,000 shares between Dec 18, 2025 and Dec 22, 2025 at about $14.68 ($1.2M). Holdings down 4% to 2,084,988 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Dec 22, 2025 |
| Dec 9–10, 2025 | Sale | Mark N. Tompkins (10% owner) sold 50,000 shares between Dec 9, 2025 and Dec 10, 2025 at about $17.09 ($854K). Holdings down 2% to 2,169,988 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Dec 11, 2025 |
| Dec 4–8, 2025 | Sale | Mark N. Tompkins (10% owner) sold 100,000 shares between Dec 4, 2025 and Dec 8, 2025 at about $16.08 ($1.6M). Holdings down 4% to 2,219,988 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Dec 9, 2025 |
12 routine transactions (such as grants, option exercises or tax withholding) are not listed.
Cluster buys
No cluster buys in the last 12 months.
Red flags
No red flags in the last 12 months.
Key events
No key events in the last 12 months.
8-K filings, last 12 months
No 8-K filings in the last 12 months.
Red flags are objective triggers only: the item or form filed, never an opinion.
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