Aeluma's three largest insider shareholders as of August 04, 2026 are Mark N. Tompkins (TenPercentOwner, 2.72Mn shares), Mark N. Tompkins (Other, 1.79Mn shares), Jonathan Klamkin (Chief Executive Officer, 1.41Mn shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Mark N. Tompkins | Other | 4,506,321 | 0 | 4,506,321 | 71.5% | 05 Feb, 2026 |
| 2 | Jonathan Klamkin | Chief Executive Officer | 1,409,398 | 0 | 1,409,398 | 22.4% | 03 Apr, 2026 |
| 3 | Steven Denbaars | Director | 385,088 | 0 | 385,088 | 6.1% | 27 Feb, 2026 |
Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.
| Date | Insider | Position | Transaction | Shares | Price | Value | Shares Held After | Ownership |
|---|---|---|---|---|---|---|---|---|
| 01 Apr, 2026 | Jonathan Klamkin | Chief Executive Officer | Disposed S | 20,000 | $13.10 | $261.95K | 1,409,398 | Direct |
| 01 Apr, 2026 | Jonathan Klamkin | Chief Executive Officer | Disposed S | 20,000 | $13.10 | $261.95K | 1,409,398 | Direct |
| 01 Apr, 2026 | Jonathan Klamkin | Chief Executive Officer | Disposed S | 20,000 | $13.10 | $261.95K | 1,409,398 | Direct |
| 04 Mar, 2026 | Jonathan Klamkin | Chief Executive Officer | Disposed S | 28,206 | $17.77 | $501.35K | 1,451,192 | Direct |
| 04 Mar, 2026 | Jonathan Klamkin | Chief Executive Officer | Disposed S | 28,206 | $17.77 | $501.35K | 1,451,192 | Direct |
| 04 Mar, 2026 | Jonathan Klamkin | Chief Executive Officer | Disposed S | 28,206 | $17.77 | $501.35K | 1,451,192 | Direct |
| 04 Mar, 2026 | Jonathan Klamkin | Chief Executive Officer | Disposed S | 21,794 | $18.41 | $401.25K | 1,429,398 | Direct |
| 04 Mar, 2026 | Jonathan Klamkin | Chief Executive Officer | Disposed S | 21,794 | $18.41 | $401.25K | 1,429,398 | Direct |
| 04 Mar, 2026 | Jonathan Klamkin | Chief Executive Officer | Disposed S | 21,794 | $18.41 | $401.25K | 1,429,398 | Direct |
| 25 Feb, 2026 | Steven Denbaars | Director | Disposed S | 12,500 | $17.58 | $219.77K | 397,588 | Direct |
| 26 Feb, 2026 | Steven Denbaars | Director | Disposed S | 12,500 | $15.85 | $198.09K | 385,088 | Direct |
| 04 Feb, 2026 | Mark N. Tompkins | Other | Disposed S | 28,544 | $14.63 | $417.60K | 1,796,444 | Direct |
| 04 Feb, 2026 | Mark N. Tompkins | Other | Disposed S | 28,544 | $14.63 | $417.60K | 1,796,444 | Direct |
| 04 Feb, 2026 | Mark N. Tompkins | Other | Disposed S | 28,544 | $14.63 | $417.60K | 1,796,444 | Direct |
| 04 Feb, 2026 | Mark N. Tompkins | Other | Disposed S | 5,956 | $15.12 | $90.05K | 1,790,488 | Direct |
| 04 Feb, 2026 | Mark N. Tompkins | Other | Disposed S | 5,956 | $15.12 | $90.05K | 1,790,488 | Direct |
| 04 Feb, 2026 | Mark N. Tompkins | Other | Disposed S | 5,956 | $15.12 | $90.05K | 1,790,488 | Direct |
| 29 Jan, 2026 | Mark N. Tompkins | TenPercentOwner | Disposed S | 27,297 | $16.75 | $457.22K | 1,892,691 | Direct |
| 29 Jan, 2026 | Mark N. Tompkins | TenPercentOwner | Disposed S | 27,297 | $16.75 | $457.22K | 1,892,691 | Direct |
| 29 Jan, 2026 | Mark N. Tompkins | TenPercentOwner | Disposed S | 27,297 | $16.75 | $457.22K | 1,892,691 | Direct |