ALMUNasdaqSemiconductors & Related DevicesFiscal year ends June 30
Aeluma, Inc.
Financials through Q4 FY2026, quarter ended Jun 30, 2026Last filing: 10-K on Sep 16, 2026
$7.80−0.15 (-1.89%)
Close on Oct 19, 2026
- Market cap
- –
- P/E (TTM)
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- Dividend yield
- –
Ownership
Institutional holdings as of Jun 30, 2026, from 13F filings
Held by institutions
28.2%
5M of 19M shares
Institutional holders
97
20 new, 11 sold out
Net institutional buying
1M
In Q2 2026
Insider trades, 12 months
0 buys · 58 sales
Net sold $14.63M
Shares held by institutions
Holders of more than 5%
Latest Schedule 13D (active) or 13G (passive) filed by each holder
| Holder | Shares | % of class | Filing | As of |
|---|---|---|---|---|
| BlackRock, Inc. | 963,791 | 5.30% | 13G (passive) | Jun 30, 2026 |
| Perry George Herbert | 1,000,000 | 5.60% | 13G (passive) | Mar 30, 2026 |
Top institutional holders
13F holdings as of Jun 30, 2026
| Holder | Shares | % of ALMU | Value | Change | % of portfolio |
|---|---|---|---|---|---|
| BlackRock, Inc. | 973,235 | 5.05% | $21.49M | +113,528 | 0.00% |
| D. E. Shaw & Co., Inc. | 797,983 | 4.14% | $17.62M | +772,983 | 0.01% |
| Vanguard Capital Management LLC | 574,417 | 2.98% | $12.68M | −14,334 | 0.00% |
| Millennium Management LLC | 529,005 | 2.75% | $11.68M | +130,706 | 0.00% |
| Geode Capital Management, LLC | 318,018 | 1.65% | $7.02M | +22,696 | 0.00% |
| State Street Corp | 254,168 | 1.32% | $5.61M | +6,823 | 0.00% |
| Apis Capital Advisors, LLC | 194,000 | 1.01% | $4.28M | −12,000 | 0.42% |
| AWM Investment Company, Inc. | 131,404 | 0.68% | $2.90M | −68,596 | 0.25% |
| Northern Trust Corp | 123,505 | 0.64% | $2.73M | +7,582 | 0.00% |
| Vanguard Portfolio Management LLC | 112,400 | 0.58% | $2.48M | −7,481 | 0.00% |
| Marshall Wace, Llp | 95,964 | 0.50% | $2.12M | −53,473 | 0.00% |
| Bank of New York Mellon Corp | 92,697 | 0.48% | $2.05M | +64,397 | 0.00% |
| Lazard Asset Management LLC | 90,586 | 0.47% | $2.00M | New | 0.00% |
| Vanguard Fiduciary Trust Co | 84,175 | 0.44% | $1.86M | +11,199 | 0.00% |
| Westside Investment Management, Inc. | 52,575 | 0.27% | $1.16M | −10,255 | 0.15% |
| Wedbush Securities Inc | 51,425 | 0.27% | $1.14K | New | 0.03% |
| UBS Group AG | 47,078 | 0.24% | $1.04M | −73,932 | 0.00% |
| Citadel Advisors LLC | 41,219 | 0.21% | $910.12K | New | 0.00% |
| Morgan Stanley | 41,155 | 0.21% | $908.70K | −1,710 | 0.00% |
| LPL Financial LLC | 38,878 | 0.20% | $858.43K | +12,584 | 0.00% |
Institutional buying and selling by quarter
Positions opened, added to, reduced and closed by 13F filers
| Quarter | Holders | Shares held | % of shares | New / added | Reduced / closed | Shares bought | Shares sold |
|---|---|---|---|---|---|---|---|
| Q2 2026 | 97 | 5M | 28.2% | 20 / 31 | 28 / 11 | 2M | 1M |
| Q1 2026 | 90 | 5M | 25.4% | 25 / 27 | 19 / 10 | 2M | 0M |
| Q4 2025 | 76 | 4M | 20.8% | 20 / 31 | 15 / 11 | 1M | 1M |
| Q3 2025 | 69 | 4M | 18.8% | 25 / 18 | 14 / 3 | 2M | 0M |
| Q2 2025 | 48 | 2M | 10.9% | 41 / 3 | 2 / 1 | 2M | 1M |
| Q1 2025 | 8 | 1M | 6.7% | 8 / 0 | 0 / 0 | 1M | 0M |
Top mutual fund and ETF holders
Latest monthly portfolio reports (Form N-PORT)
| Fund | Shares | % of ALMU | Value | % of fund | As of |
|---|---|---|---|---|---|
| Vanguard Total Stock Market Index Fund | 428,381 | 2.22% | $9.46M | 0.00% | Jun 30, 2026 |
| iShares Russell 2000 ETF | 342,559 | 1.78% | $7.56M | 0.01% | Jun 30, 2026 |
| Fidelity Small Cap Index Fund | 141,399 | 0.73% | $2.29M | 0.01% | Jul 31, 2026 |
| Vanguard Extended Market Index Fund | 128,126 | 0.67% | $2.83M | 0.00% | Jun 30, 2026 |
| iShares Russell 2000 Growth ETF | 121,494 | 0.63% | $2.68M | 0.02% | Jun 30, 2026 |
| Vanguard Russell 2000 Index Fund | 66,824 | 0.35% | $1.44M | 0.01% | May 31, 2026 |
| WisdomTree Quantum Computing Fund | 64,181 | 0.33% | $1.42M | 0.43% | Jun 30, 2026 |
| Fidelity Extended Market Index Fund | 59,145 | 0.31% | $1.28M | 0.00% | May 31, 2026 |
| iShares Micro-Cap ETF | 43,547 | 0.23% | $961.52K | 0.06% | Jun 30, 2026 |
| Schwab Small-Cap Index Fund | 30,687 | 0.16% | $497.13K | 0.01% | Jul 31, 2026 |
| Master Small Cap Index Series | 22,894 | 0.12% | $505.50K | 0.01% | Jun 30, 2026 |
| Vanguard U.S. Momentum Factor ETF | 22,700 | 0.12% | $489.87K | 0.03% | May 31, 2026 |
| Fidelity Total Market Index Fund | 20,747 | 0.11% | $447.72K | 0.00% | May 31, 2026 |
| Fidelity Series Total Market Index Fund | 17,521 | 0.09% | $378.10K | 0.00% | May 31, 2026 |
| Nuveen Small Cap Blend Index Fund | 17,299 | 0.09% | $280.24K | 0.01% | Jul 31, 2026 |
Officers, directors and major owners
People who filed Forms 3, 4 or 5 in the last two years
| Name | Role | Shares owned | % of shares | Latest filing |
|---|---|---|---|---|
| Jonathan Klamkin | Chief Executive Officer, Director | 1,261,169 | 6.55% | Sep 23, 2026 |
| Christopher P. Stewart | Chief Financial Officer | 18,478 | 0.10% | Sep 23, 2026 |
| James Seo | Interim CFO | – | – | May 27, 2025 |
| Michael Byron | Director | 38,343 | 0.20% | Sep 23, 2026 |
| Steven Denbaars | Director | 345,209 | 1.79% | Aug 28, 2026 |
| Craig H. Ensley | Director | 27,300 | 0.14% | Mar 2, 2026 |
| John Kenneth Paglia | Director | 23,361 | 0.12% | Mar 2, 2026 |
| Mark N. Tompkins | – | 1,790,488 | 9.29% | Feb 5, 2026 |
| Lee McCarthy | 10% owner | 977,425 | 5.07% | Jan 2, 2026 |
Insider trades
Common stock transactions reported on Form 4, newest first
| Insider | Date | Transaction | Shares | Price | Value | Shares after |
|---|---|---|---|---|---|---|
| Christopher P. Stewart Chief Financial Officer | Sep 21, 2026 | Tax withholding | −1,450 | $13.61 | $19.73K | 18,478 |
| Christopher P. Stewart Chief Financial Officer | Sep 21, 2026 | Award | +15,886 | – | – | 15,886 |
| Christopher P. Stewart Chief Financial Officer | Sep 21, 2026 | Award | +4,042 | – | – | 19,928 |
| Jonathan Klamkin Chief Executive Officer, Director | Sep 21, 2026 | Award | +31,771 | – | – | 34,174 |
| Jonathan Klamkin Chief Executive Officer, Director | Sep 21, 2026 | Award | +12,675 | – | – | 46,849 |
| Jonathan Klamkin Chief Executive Officer, Director | Sep 21, 2026 | Sale(10b5-1 plan) | −100,000 | $13.35 | $1.34M | 1,226,995 |
| Jonathan Klamkin Chief Executive Officer, Director | Sep 21, 2026 | Tax withholding | −4,547 | $13.61 | $61.88K | 42,302 |
| Michael Byron Director | Sep 21, 2026 | Option exercise | +25,000 | $5.93 | $148.25K | 38,343 |
| Steven Denbaars Director | Aug 27, 2026 | Sale | −12,500 | $13.82 | $172.75K | 345,209 |
| Steven Denbaars Director | Aug 27, 2026 | Sale(10b5-1 plan) | −12,500 | $13.82 | $172.75K | 345,209 |
| Steven Denbaars Director | Aug 26, 2026 | Sale | −12,500 | $13.84 | $173.00K | 357,709 |
| Steven Denbaars Director | Aug 26, 2026 | Sale(10b5-1 plan) | −12,500 | $13.84 | $173.00K | 357,709 |
| Jonathan Klamkin Chief Executive Officer, Director | Aug 3, 2026 | Gift | +20,000 | – | – | 22,403 |
| Jonathan Klamkin Chief Executive Officer, Director | Aug 3, 2026 | Sale(10b5-1 plan) | −4,190 | $16.29 | $68.26K | 18,213 |
| Jonathan Klamkin Chief Executive Officer, Director | Aug 3, 2026 | Sale(10b5-1 plan) | −15,810 | $16.85 | $266.40K | 2,403 |
| Jonathan Klamkin Chief Executive Officer, Director | Aug 3, 2026 | Gift | −20,000 | – | – | 1,326,995 |
| Jonathan Klamkin Chief Executive Officer, Director | Jul 1, 2026 | Gift | +20,000 | – | – | 22,403 |
| Jonathan Klamkin Chief Executive Officer, Director | Jul 1, 2026 | Sale(10b5-1 plan) | −19,900 | $21.08 | $419.49K | 2,503 |
| Jonathan Klamkin Chief Executive Officer, Director | Jul 1, 2026 | Sale(10b5-1 plan) | −100 | $21.56 | $2.16K | 2,403 |
| Jonathan Klamkin Chief Executive Officer, Director | Jul 1, 2026 | Gift | −20,000 | – | – | 1,346,995 |
| Jonathan Klamkin Chief Executive Officer, Director | Jun 1, 2026 | Sale(10b5-1 plan) | −7,900 | $24.39 | $192.68K | 12,203 |
| Jonathan Klamkin Chief Executive Officer, Director | Jun 1, 2026 | Sale(10b5-1 plan) | −900 | $22.19 | $19.97K | 21,503 |
| Jonathan Klamkin Chief Executive Officer, Director | Jun 1, 2026 | Gift | +20,000 | – | – | 22,403 |
| Jonathan Klamkin Chief Executive Officer, Director | Jun 1, 2026 | Gift | −20,000 | – | – | 1,366,995 |
| Jonathan Klamkin Chief Executive Officer, Director | Jun 1, 2026 | Sale(10b5-1 plan) | −1,600 | $25.12 | $40.19K | 10,603 |
| Jonathan Klamkin Chief Executive Officer, Director | Jun 1, 2026 | Sale(10b5-1 plan) | −8,200 | $26.25 | $215.25K | 2,403 |
| Jonathan Klamkin Chief Executive Officer, Director | Jun 1, 2026 | Sale(10b5-1 plan) | −1,400 | $23.32 | $32.65K | 20,103 |
| Steven Denbaars Director | May 20, 2026 | Sale(10b5-1 plan) | −11,558 | $20.40 | $235.78K | 371,151 |
| Steven Denbaars Director | May 20, 2026 | Sale(10b5-1 plan) | −942 | $21.30 | $20.06K | 370,209 |
| Steven Denbaars Director | May 19, 2026 | Sale(10b5-1 plan) | −5,085 | $20.61 | $104.80K | 382,709 |
| Steven Denbaars Director | May 19, 2026 | Sale(10b5-1 plan) | −7,415 | $19.56 | $145.04K | 387,794 |
| Jonathan Klamkin Chief Executive Officer, Director | May 1, 2026 | Sale(10b5-1 plan) | −15,024 | $25.15 | $377.85K | 3,079 |
| Jonathan Klamkin Chief Executive Officer, Director | May 1, 2026 | Sale(10b5-1 plan) | −4,300 | $24.20 | $104.06K | 18,103 |
| Jonathan Klamkin Chief Executive Officer, Director | May 1, 2026 | Gift | +20,000 | – | – | 22,403 |
| Jonathan Klamkin Chief Executive Officer, Director | May 1, 2026 | Gift | −20,000 | – | – | 1,386,995 |
| Jonathan Klamkin Chief Executive Officer, Director | May 1, 2026 | Sale(10b5-1 plan) | −676 | $25.71 | $17.38K | 2,403 |
| Jonathan Klamkin Chief Executive Officer, Director | Apr 1, 2026 | Gift | +20,000 | – | – | 22,403 |
| Jonathan Klamkin Chief Executive Officer, Director | Apr 1, 2026 | Gift | −20,000 | – | – | 1,406,995 |
| Jonathan Klamkin Chief Executive Officer, Director | Apr 1, 2026 | Sale(10b5-1 plan) | −20,000 | $13.10 | $262.00K | 1,409,398 |
| Jonathan Klamkin Chief Executive Officer, Director | Mar 4, 2026 | Gift | −50,000 | – | – | 1,426,995 |
| Jonathan Klamkin Chief Executive Officer, Director | Mar 4, 2026 | Gift | +50,000 | – | – | 52,403 |
| Jonathan Klamkin Chief Executive Officer, Director, 10% owner | Mar 4, 2026 | Sale(10b5-1 plan) | −28,206 | $17.77 | $501.22K | 1,451,192 |
| Jonathan Klamkin Chief Executive Officer, Director, 10% owner | Mar 4, 2026 | Sale(10b5-1 plan) | −21,794 | $18.41 | $401.23K | 1,429,398 |
| Steven Denbaars Director | Feb 26, 2026 | Sale(10b5-1 plan) | −12,500 | $15.85 | $198.13K | 385,088 |
| Steven Denbaars Director | Feb 25, 2026 | Sale(10b5-1 plan) | −12,500 | $17.58 | $219.75K | 397,588 |
| Mark N. Tompkins – | Feb 4, 2026 | Sale | −5,956 | $15.12 | $90.05K | 1,790,488 |
| Mark N. Tompkins – | Feb 4, 2026 | Sale | −28,544 | $14.63 | $417.60K | 1,796,444 |
| Mark N. Tompkins 10% owner | Feb 2, 2026 | Sale | −37,500 | $15.74 | $590.25K | 1,824,988 |
| Mark N. Tompkins 10% owner | Jan 30, 2026 | Sale | −908 | $16.79 | $15.25K | 1,862,488 |
| Mark N. Tompkins 10% owner | Jan 30, 2026 | Sale | −24,092 | $15.88 | $382.58K | 1,863,396 |
| Mark N. Tompkins 10% owner | Jan 29, 2026 | Sale | −5,203 | $17.16 | $89.28K | 1,887,488 |
| Mark N. Tompkins 10% owner | Jan 29, 2026 | Sale | −27,297 | $16.75 | $457.22K | 1,892,691 |
| Mark N. Tompkins 10% owner | Jan 22, 2026 | Sale | −962 | $18.81 | $18.10K | 1,919,988 |
| Mark N. Tompkins 10% owner | Jan 22, 2026 | Sale | −29,038 | $18.05 | $524.14K | 1,920,950 |
| Mark N. Tompkins 10% owner | Jan 21, 2026 | Sale | −1,715 | $20.44 | $35.05K | 1,949,998 |
| Mark N. Tompkins 10% owner | Jan 21, 2026 | Sale | −12,947 | $19.30 | $249.88K | 1,951,713 |
| Mark N. Tompkins 10% owner | Jan 21, 2026 | Sale | −10 | $21.24 | $212 | 1,949,988 |
| Mark N. Tompkins 10% owner | Jan 21, 2026 | Sale | −30,328 | $18.52 | $561.67K | 1,964,660 |
| Mark N. Tompkins 10% owner | Jan 20, 2026 | Sale | −888 | $21.58 | $19.16K | 1,994,988 |
| Mark N. Tompkins 10% owner | Jan 20, 2026 | Sale | −29,112 | $20.66 | $601.45K | 1,995,876 |
Awards, option exercises, tax withholding and gifts are shown alongside open-market buys and sales. Each name links to the filing on SEC EDGAR.
Planned insider sales
Notices of proposed sale filed on Form 144 before shares are sold
| Seller | Filed | Shares | Market value | Planned sale | Acquired through |
|---|---|---|---|---|---|
| Drelle Gelasca Family Trust dated 08/28/2025 Klamkin Director, Officer | Oct 13, 2026 | 100,000 | $1.14M | Oct 12, 2026 | Founders Shares |
| Drelle Gelasca Family Trust dated 08/28/2025 Klamkin Director, Officer | Sep 21, 2026 | 100,000 | $1.27M | Sep 21, 2026 | Founders Shares |
| DenBaars Steven Director | Aug 26, 2026 | 25,000 | $347.00K | Aug 26, 2026 | ISO |
| Klamkin Jonathan Director, Officer, 10% Stockholder | Jul 1, 2026 | 40,000 | $883.20K | Jul 1, 2026 | Founders Shares |
| DenBaars Steven Director | May 19, 2026 | 25,000 | $519.00K | May 19, 2026 | APO |
| Klamkin Jonathan Director, Officer, 10% Stockholder | Mar 4, 2026 | 110,000 | $2.12M | Mar 4, 2026 | Founders Shares |
| DenBaars Steven director | Feb 25, 2026 | 25,000 | $443.75K | Feb 25, 2026 | APO |
| Jonathan Klamkin Officer, Director | Sep 9, 2025 | 150,000 | $2.83M | Aug 14, 2025 | Private Placement |
| Jonathan Klamkin Officer, Director | Aug 14, 2025 | 150,000 | $2.83M | Aug 14, 2025 | Private Placement |