Aeluma, Inc.
ALMU · Semiconductors & Related Devices · 18.3M shares · +180%/yr ↑ dilution · EDGAR filings ↗
Net buyback after stock comp: -$728K (gross $4K, SBC $732K)
Reference price $22.19 · est. market cap ~$406M — last insider sale, 2026-06-01 (estimated from the dated SEC Form 4 price × shares outstanding — not a live quote)
Grade
D42Photonics/compound-semiconductor micro-cap with operating losses, very cash-rich.
Strengths
- Very cash-rich — current ratio 24.6 (97th)
Risks
- Operating/net losses — operating margin -46%, net margin -65%
- Cash burn — FCF -$1.3M
- Scale/commercialization risk — per 10-K
Notable findings
- Net lossNet loss (net margin -64.8%)
- Cash burnNegative free cash flow (-1.3M)
- Fund exitedNotable fund(s) exited this quarter: VANGUARD GROUP INC
- Chronic dilutionShare count +180%/yr over 3y (dilution, book value/share -84%)
- Notable holderHeld by 4 notable fund(s): STATE STREET CORP, CITADEL ADVISORS LLC, GOLDMAN SACHS GROUP INC +1 more (as of 2026-03-31)
- Insider sellingInsider selling — 32 open-market sale(s) by 3 insider(s) (cluster of 3 insiders, ~$7M, last 6mo) Form 4 ↗
Quarterly revenue
Last 4 quarters · from SEC filings.
Key metrics
Gross margin
59.6%
Operating margin
-45.9%
Net margin
-64.8%
Return on equity
-16.9%
Return on assets
-15.6%
Revenue growth (QoQ)
-3.9%
Current ratio
24.6×
Free cash flow
-$1M
EBITDA
-$2M
Tangible book value
$18M
Cash & investments
$4M
Cash runway
11q
Stock comp / revenue
40.6%
Insider transactions · last 18 months
| Date | Insider | Type | Shares | Price |
|---|---|---|---|---|
| 2026-06-01 | Klamkin Jonathan | Sell | 8.2K | $26.25 |
| 2026-06-01 | Klamkin Jonathan | Gift | 20K | — |
| 2026-06-01 | Klamkin Jonathan | Gift | 20K | — |
| 2026-06-01 | Klamkin Jonathan | Sell | 900 | $22.19 |
| 2026-06-01 | Klamkin Jonathan | Sell | 1.4K | $23.32 |
| 2026-06-01 | Klamkin Jonathan | Sell | 7.9K | $24.39 |
| 2026-06-01 | Klamkin Jonathan | Sell | 1.6K | $25.12 |
| 2026-05-20 | Denbaars Steven | Sell | 12K | $20.40 |
| 2026-05-20 | Denbaars Steven | Sell | 942 | $21.30 |
| 2026-05-19 | Denbaars Steven | Sell | 5.1K | $20.61 |
| 2026-05-19 | Denbaars Steven | Sell | 7.4K | $19.56 |
| 2026-05-01 | Klamkin Jonathan | Sell | 4.3K | $24.20 |
| 2026-05-01 | Klamkin Jonathan | Sell | 676 | $25.71 |
| 2026-05-01 | Klamkin Jonathan | Gift | 20K | — |
| 2026-05-01 | Klamkin Jonathan | Gift | 20K | — |
| 2026-05-01 | Klamkin Jonathan | Sell | 15K | $25.15 |
| 2026-04-01 | Klamkin Jonathan | Gift | 20K | — |
| 2026-04-01 | Klamkin Jonathan | Sell | 20K | $13.10 |
| 2026-04-01 | Klamkin Jonathan | Gift | 20K | — |
| 2026-03-04 | Klamkin Jonathan | Sell | 22K | $18.41 |
| 2026-03-04 | Klamkin Jonathan | Sell | 28K | $17.77 |
| 2026-03-04 | Klamkin Jonathan | Gift | 50K | — |
| 2026-03-04 | Klamkin Jonathan | Gift | 50K | — |
| 2026-02-26 | Denbaars Steven | Sell | 12K | $15.85 |
| 2026-02-25 | Denbaars Steven | Sell | 12K | $17.58 |
| 2026-02-04 | Tompkins Mark N. | Sell | 29K | $14.63 |
| 2026-02-04 | Tompkins Mark N. | Sell | 6.0K | $15.12 |
| 2026-02-02 | Tompkins Mark N. | Sell | 38K | $15.74 |
| 2026-01-30 | Tompkins Mark N. | Sell | 908 | $16.79 |
| 2026-01-30 | Tompkins Mark N. | Sell | 24K | $15.88 |
| 2026-01-29 | Tompkins Mark N. | Sell | 27K | $16.75 |
| 2026-01-29 | Tompkins Mark N. | Sell | 5.2K | $17.16 |
| 2026-01-22 | Tompkins Mark N. | Sell | 962 | $18.81 |
| 2026-01-22 | Tompkins Mark N. | Sell | 29K | $18.05 |
| 2026-01-21 | Tompkins Mark N. | Sell | 30K | $18.52 |
| 2026-01-21 | Tompkins Mark N. | Sell | 13K | $19.30 |
| 2026-01-21 | Tompkins Mark N. | Sell | 10 | $21.24 |
| 2026-01-21 | Tompkins Mark N. | Sell | 1.7K | $20.44 |
| 2026-01-20 | Tompkins Mark N. | Sell | 29K | $20.66 |
| 2026-01-20 | Tompkins Mark N. | Sell | 888 | $21.58 |
| 2025-12-29 | Klamkin Jonathan | Gift | 1.1M | — |
| 2025-12-29 | Klamkin Jonathan | Gift | 1.1M | — |
| 2025-12-26 | Tompkins Mark N. | Sell | 7.0K | $16.91 |
| 2025-12-26 | Tompkins Mark N. | Sell | 2.7K | $18.39 |
| 2025-12-26 | Tompkins Mark N. | Sell | 20K | $18.01 |
| 2025-12-24 | Tompkins Mark N. | Sell | 15K | $16.05 |
| 2025-12-23 | Tompkins Mark N. | Sell | 15K | $14.87 |
| 2025-12-22 | Tompkins Mark N. | Sell | 35K | $14.83 |
| 2025-12-19 | Klamkin Jonathan | Gift | 350K | — |
| 2025-12-19 | Klamkin Jonathan | Gift | 350K | — |
| 2025-12-19 | Tompkins Mark N. | Sell | 30K | $14.70 |
| 2025-12-18 | Tompkins Mark N. | Sell | 20K | $14.37 |
| 2025-12-10 | Tompkins Mark N. | Sell | 20K | $17.49 |
| 2025-12-09 | Tompkins Mark N. | Sell | 19K | $17.06 |
| 2025-12-09 | Tompkins Mark N. | Sell | 11K | $16.39 |
| 2025-12-08 | Tompkins Mark N. | Sell | 39K | $16.04 |
| 2025-12-08 | Tompkins Mark N. | Sell | 988 | $16.87 |
| 2025-12-05 | Tompkins Mark N. | Sell | 28K | $16.12 |
| 2025-12-05 | Tompkins Mark N. | Sell | 1.6K | $16.49 |
| 2025-12-04 | Tompkins Mark N. | Sell | 12K | $15.49 |
| 2025-12-04 | Tompkins Mark N. | Sell | 18K | $16.37 |
| 2025-12-03 | Byron Michael | Grant | 13K | — |
| 2025-12-03 | Denbaars Steven | Grant | 10K | — |
| 2025-12-03 | ENSLEY CRAIG H | Grant | 11K | — |
| 2025-12-03 | Paglia John Kenneth | Grant | 11K | — |
| 2025-10-20 | Tompkins Mark N. | Sell | 38K | $16.39 |
| 2025-10-17 | Tompkins Mark N. | Sell | 743 | $18.45 |
| 2025-10-17 | Tompkins Mark N. | Sell | 5.9K | $17.77 |
| 2025-10-17 | Tompkins Mark N. | Sell | 33K | $16.75 |
| 2025-10-16 | Tompkins Mark N. | Sell | 810 | $20.72 |
| 2025-10-16 | Tompkins Mark N. | Sell | 6.7K | $19.96 |
| 2025-10-16 | Tompkins Mark N. | Sell | 18K | $18.97 |
| 2025-10-15 | Tompkins Mark N. | Sell | 16K | $21.31 |
| 2025-10-15 | Tompkins Mark N. | Sell | 24K | $20.11 |
| 2025-10-14 | Tompkins Mark N. | Sell | 37K | $19.86 |
| 2025-10-13 | Tompkins Mark N. | Sell | 300 | $17.57 |
| 2025-10-13 | Tompkins Mark N. | Sell | 35K | $16.97 |
| 2025-10-10 | Tompkins Mark N. | Sell | 4.4K | $17.16 |
| 2025-10-10 | Tompkins Mark N. | Sell | 31K | $16.60 |
| 2025-10-09 | Tompkins Mark N. | Sell | 1.0K | $17.25 |
| 2025-10-09 | Tompkins Mark N. | Sell | 36K | $16.54 |
| 2025-10-08 | Tompkins Mark N. | Sell | 34K | $17.46 |
| 2025-10-08 | Tompkins Mark N. | Sell | 700 | $18.14 |
| 2025-10-07 | Tompkins Mark N. | Sell | 400 | $19.16 |
| 2025-10-07 | Tompkins Mark N. | Sell | 27K | $17.46 |
| 2025-10-07 | Tompkins Mark N. | Sell | 7.9K | $18.66 |
| 2025-10-06 | Tompkins Mark N. | Sell | 64K | $18.70 |
| 2025-10-03 | Tompkins Mark N. | Sell | 13K | $17.94 |
| 2025-10-03 | Tompkins Mark N. | Sell | 18K | $17.30 |
| 2025-10-02 | Tompkins Mark N. | Sell | 120 | $17.58 |
| 2025-10-02 | Tompkins Mark N. | Sell | 35K | $17.10 |
| 2025-10-01 | Tompkins Mark N. | Sell | 9.1K | $16.39 |
| 2025-10-01 | Tompkins Mark N. | Sell | 41K | $16.97 |
| 2025-09-30 | Tompkins Mark N. | Sell | 200 | $17.54 |
| 2025-09-30 | Tompkins Mark N. | Sell | 34K | $16.18 |
| 2025-09-30 | Tompkins Mark N. | Sell | 33K | $16.18 |
| 2025-09-29 | Tompkins Mark N. | Sell | 1.6K | $18.36 |
| 2025-09-29 | Tompkins Mark N. | Sell | 23K | $17.52 |
| 2025-08-14 | Klamkin Jonathan | Sell | 150K | $18.85 |
| 2025-08-14 | Klamkin Jonathan | Sell | 150K | $18.85 |
| 2025-07-01 | Klamkin Jonathan | Other | 2.4K | $16.37 |
| 2025-07-01 | Klamkin Jonathan | Other | 2.4K | $16.37 |
| 2025-03-27 | Tompkins Mark N. | Conversion | 200K | $3.50 |
All non-derivative Form 4 activity (SEC), newest first.
Notable events (8-K)
Recent filings
| Form | Filed | Period | Accession |
|---|---|---|---|
| 8-K | 2026-05-19 | 2026-05-19 | 0001213900-26-058750 ↗ |
| 8-K | 2026-05-13 | 2026-05-13 | 0001213900-26-055893 ↗ |
| 10-Q | 2026-05-13 | 2026-03-31 | 0001213900-26-055956 ↗ |
| 8-K | 2026-03-20 | 2026-03-20 | 0001213900-26-032426 ↗ |
| 10-Q | 2026-02-11 | 2025-12-31 | 0001213900-26-014999 ↗ |
| 8-K | 2026-02-11 | 2026-02-11 | 0001213900-26-014960 ↗ |
| 8-K | 2026-01-20 | 2026-01-20 | 0001213900-26-005724 ↗ |
| 10-Q | 2025-11-12 | 2025-09-30 | 0001213900-25-109328 ↗ |
| 8-K | 2025-11-12 | 2025-11-12 | 0001213900-25-109273 ↗ |
| 8-K | 2025-10-20 | 2025-10-20 | 0001213900-25-100283 ↗ |
| 8-K | 2025-09-19 | 2025-09-17 | 0001213900-25-089569 ↗ |
| 8-K | 2025-09-19 | 2025-09-16 | 0001213900-25-089642 ↗ |