AELUMA INC ALMU
COM · Common Stock · CUSIP 00776X109
- SectorTechnology
- IndustrySemiconductors & Related Devices
- HeadquartersGoleta, CA
- FilingsSEC EDGAR
* Summed across managers. Shares that two managers' reports both contain – a subsidiary's holdings that its parent's report includes too, or a sub-adviser's in its client's – are counted once ($10.5k this quarter). Holder counts are more reliable. Shares outstanding: 18.3m as of 2026-05-08, from the company's own SEC filing; the percentage can still exceed 100%: lent-out shares are counted by the lender and the buyer, and some reports overlap without saying so. Implied quarter-end price ≈ $22.05. Options: 8 managers hold calls ($14.5m notional), 6 hold puts ($7.6m).
Trends to Q2 2026
Institutional holders
Managers reporting a position, each quarter
Numbers
| Quarter | Holders |
|---|---|
| Q1 2025 | 9 |
| Q2 2025 | 49 |
| Q3 2025 | 69 |
| Q4 2025 | 76 |
| Q1 2026 | 90 |
| Q2 2026 | 97 |
Buyers vs sellers
Managers adding to or starting a position, vs cutting or selling out
Numbers
| Quarter | Bought or added | Cut or sold out |
|---|---|---|
| Q2 2025 | 44 | 3 |
| Q3 2025 | 43 | 17 |
| Q4 2025 | 49 | 26 |
| Q1 2026 | 48 | 29 |
| Q2 2026 | 51 | 39 |
Calls vs puts
Options held, notional value, last 4 quarters. P/C = puts ÷ calls
Numbers
| Quarter | Calls | Puts | P/C |
|---|---|---|---|
| Q3 2025 | $1.3m | $2.0m | 1.58 |
| Q4 2025 | $5.3m | $2.6m | 0.49 |
| Q1 2026 | $4.9m | $1.8m | 0.38 |
| Q2 2026 | $14.5m | $7.6m | 0.53 |
Biggest buyers
| D. E. Shaw & Co., Inc. | Added | +773.0k |
| MILLENNIUM MANAGEMENT LLC | Added | +130.7k |
| BlackRock, Inc. | Added | +113.5k |
| LAZARD ASSET MANAGEMENT LLC | New | +90.6k |
| Bank of New York Mellon Corp | Added | +64.4k |
| WEDBUSH SECURITIES INC | New | +51.4k |
| CITADEL ADVISORS LLC | New | +41.2k |
| Cambridge Investment Research Advisors, Inc. | New | +32.4k |
| Balyasny Asset Management L.P. | New | +28.8k |
| WELLS FARGO & COMPANY/MN | Added | +23.1k |
Biggest sellers
| RAYMOND JAMES FINANCIAL INC | Sold out | -267.6k |
| Polar Asset Management Partners Inc. | Sold out | -91.0k |
| UBS Group AG | Reduced | -73.9k |
| Maytree Asset Management Ltd | Reduced | -71.8k |
| AWM Investment Company, Inc. | Reduced | -68.6k |
| THOMPSON SIEGEL & WALMSLEY LLC | Reduced | -67.3k |
| MARSHALL WACE, LLP | Reduced | -53.5k |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Sold out | -49.7k |
| Trexquant Investment LP | Sold out | -34.1k |
| Quantbot Technologies LP | Sold out | -29.5k |
Biggest calls
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Added | $4.6m208.0k shares |
| JANE STREET GROUP, LLC | Reduced | $2.7m121.8k shares |
| PEAK6 LLC | Added | $2.3m102.3k shares |
| CITADEL ADVISORS LLC | Added | $2.2m100.5k shares |
| IMC-Chicago, LLC | Reduced | $1.1m49.5k shares |
| SIMPLEX TRADING, LLC | Added | $843.5k38.2k shares |
| GROUP ONE TRADING LLC | Added | $779.4k35.3k shares |
| FNY Investment Advisers, LLC | New | $010 shares |
Biggest puts
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Added | $4.4m198.0k shares |
| IMC-Chicago, LLC | Added | $1.1m49.1k shares |
| JANE STREET GROUP, LLC | Added | $967.1k43.8k shares |
| CITADEL ADVISORS LLC | Added | $916.3k41.5k shares |
| SIMPLEX TRADING, LLC | Added | $242.9k11.0k shares |
| GROUP ONE TRADING LLC | Reduced | $28.7k1.3k shares |
Options at notional value: the value of the shares the contracts control, as filers report them, not what the options cost. Not included in the holders, shares or buying above.
Major shareholders (over 5%)
Anyone who owns more than 5% of a class of the company's shares has to say so: on Schedule 13D if they may try to influence or control the company, on 13G if they're a passive investor, and update it as the stake changes. Each holder's latest filing, from 19 Dec 2024 on; percentages are of the share class, as the holder worked them out.
| Holder | Stake |
|---|---|
| Perry George Herbert 13G · passive investor new · filed 2026-03-31 | 5.6% |
| BlackRock, Inc. 13G · institution new · filed 2026-07-27 | 5.3% |
Fell to 5% or below in the last year: Tompkins Mark N. (4.8%, 2026-05-15), McCarthy Lee (1.5%, 2026-01-02)
Insider purchases and sales since 1 Apr 2026
Shares bought or sold by the company's own officers, directors and 10% owners, in the open market or privately, as they reported to the SEC on Form 4 (due within two business days of the trade). Grants, option exercises, shares withheld for tax and gifts aren't included.
Officers and directors buying vs selling
Number of people, by quarter (10% owners not included)
Numbers
| Quarter | Buying | Bought | Selling | Sold | Sold under a plan |
|---|---|---|---|---|---|
| Q4 2024 | 0 | — | 0 | — | — |
| Q1 2025 | 0 | — | 0 | — | — |
| Q2 2025 | 0 | — | 0 | — | — |
| Q3 2025 | 0 | — | 1 | $2.8m | — |
| Q4 2025 | 0 | — | 0 | — | — |
| Q1 2026 | 0 | — | 2 | $1.3m | $1.3m |
| Q2 2026 | 0 | — | 2 | $1.8m | $1.8m |
| Q3 2026 | 0 | — | 2 | $2.4m | $2.4m |
| Date | Insider | Trade | Value |
|---|---|---|---|
| 2026-09-21 | Klamkin Jonathan Chief Executive Officer, director · By Family Trust | Sold plan | $1.3m100.0k shares |
| 2026-08-27 | Denbaars Steven Director | Sold plan | $172.8k12.5k shares |
| 2026-08-26 | Denbaars Steven Director | Sold plan | $173.0k12.5k shares |
| 2026-08-03 | Klamkin Jonathan Chief Executive Officer, director | Sold plan | $334.7k20.0k shares |
| 2026-07-01 | Klamkin Jonathan Chief Executive Officer, director | Sold plan | $421.6k20.0k shares |
| 2026-06-01 | Klamkin Jonathan Chief Executive Officer, director | Sold plan | $500.7k20.0k shares |
| 2026-05-20 | Denbaars Steven Director | Sold plan | $255.8k12.5k shares |
| 2026-05-19 | Denbaars Steven Director | Sold plan | $249.8k12.5k shares |
| 2026-05-01 | Klamkin Jonathan Chief Executive Officer, director | Sold plan | $499.3k20.0k shares |
| 2026-04-01 | Klamkin Jonathan Chief Executive Officer, director | Sold plan | $262.0k20.0k shares |
Their holding: how much the trade added to or took from the insider's holding (direct, or the trust or fund named). The same trade is sometimes reported by more than one insider, such as a fund and the director who represents it; totals count it once. A value is left blank where the reported price is far from the market price (usually a typo).
Holders, Q2 2026
| Manager | Shares | Change |
|---|---|---|
| BlackRock, Inc. 0.00% of their portfolio | 973.2k $21.5m | Added +113.5k |
| D. E. Shaw & Co., Inc. 0.01% of their portfolio | 798.0k $17.6m | Added +773.0k |
| VANGUARD CAPITAL MANAGEMENT LLC 0.00% of their portfolio | 574.4k $12.7m | Reduced -14.3k |
| MILLENNIUM MANAGEMENT LLC 0.01% of their portfolio | 529.0k $11.7m | Added +130.7k |
| GEODE CAPITAL MANAGEMENT, LLC 0.00% of their portfolio | 318.0k $7.0m | Added +22.7k |
| STATE STREET CORP 0.00% of their portfolio | 254.2k $5.6m | Added +6.8k |
| Apis Capital Advisors, LLC 0.42% of their portfolio | 194.0k $4.3m | Reduced -12.0k |
| AWM Investment Company, Inc. 0.25% of their portfolio | 131.4k $2.9m | Reduced -68.6k |
| NORTHERN TRUST CORP 0.00% of their portfolio | 123.5k $2.7m | Added +7.6k |
| VANGUARD PORTFOLIO MANAGEMENT LLC 0.00% of their portfolio | 112.4k $2.5m | Reduced -7.5k |
| MARSHALL WACE, LLP 0.00% of their portfolio | 96.0k $2.1m | Reduced -53.5k |
| Bank of New York Mellon Corp 0.00% of their portfolio | 92.7k $2.0m | Added +64.4k |
| LAZARD ASSET MANAGEMENT LLC 0.00% of their portfolio | 90.6k $2.0m | New |
| VANGUARD FIDUCIARY TRUST CO 0.00% of their portfolio | 84.2k $1.9m | Added +11.2k |
| Westside Investment Management, Inc. 0.15% of their portfolio | 52.6k $1.2m | Reduced -10.3k |
| WEDBUSH SECURITIES INC 0.03% of their portfolio | 51.4k $1.1m | New |
| UBS Group AG 0.00% of their portfolio | 47.1k $1.0m | Reduced -73.9k |
| CITADEL ADVISORS LLC 0.00% of their portfolio | 41.2k $910.1k | New |
| MORGAN STANLEY 0.00% of their portfolio | 41.2k $908.7k | Reduced -1.7k |
| LPL Financial LLC 0.00% of their portfolio | 38.9k $858.4k | Added +12.6k |
| GOLDMAN SACHS GROUP INC 0.00% of their portfolio | 38.6k $851.6k | Reduced -9.0k |
| Fortitude Advisory Group L.L.C. 0.32% of their portfolio | 37.6k $829.5k | Added +2.1k |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.00% of their portfolio | 36.7k $811.3k | Added +1.9k |
| BFSG, LLC 0.07% of their portfolio | 35.6k $786.1k | Unchanged |
| THOMPSON SIEGEL & WALMSLEY LLC 0.01% of their portfolio | 33.1k $730.0k | Reduced -67.3k |
| Cambridge Investment Research Advisors, Inc. 0.00% of their portfolio | 32.4k $714.0k | New |
| WELLS FARGO & COMPANY/MN 0.00% of their portfolio | 32.1k $709.8k | Added +23.1k |
| IMC-Chicago, LLC 0.01% of their portfolio | 29.9k $660.1k | Added +14.4k |
| Balyasny Asset Management L.P. 0.00% of their portfolio | 28.8k $636.7k | New |
| Cetera Investment Advisers 0.00% of their portfolio | 24.6k $542.7k | Reduced -1.8k |
| MML INVESTORS SERVICES, LLC 0.00% of their portfolio | 24.4k $539.4k | Added +12.0k |
| BANK OF AMERICA CORP /DE/ 0.00% of their portfolio | 23.1k $509.5k | Added +7.1k |
| Quent Capital, LLC 0.03% of their portfolio | 22.0k $485.8k | Added +10.0k |
| JANE STREET GROUP, LLC 0.00% of their portfolio | 20.4k $449.4k | New |
| GatePass Capital, LLC 0.17% of their portfolio | 20.0k $441.6k | Unchanged |
| Nuveen, LLC 0.00% of their portfolio | 17.3k $382.0k | Added +1.6k |
| CHILTON INVESTMENT CO INC. 0.01% of their portfolio | 16.0k $353.0k | New |
| PENSION & WEALTH MANAGEMENT ADVISORS, INC. 0.09% of their portfolio | 15.9k $351.1k | Unchanged |
| RHUMBLINE ADVISERS 0.00% of their portfolio | 15.2k $335.1k | Added +390 |
| Total Clarity Wealth Management, Inc. 0.07% of their portfolio | 15.2k $335.1k | New |
| MCF Advisors LLC 0.01% of their portfolio | 15.1k $332.9k | Reduced -3.5k |
| &PARTNERS 0.00% of their portfolio | 15.1k $332.5k | Unchanged |
| MISSION WEALTH MANAGEMENT, LP 0.00% of their portfolio | 14.0k $308.7k | Unchanged |
| ProShare Advisors LLC 0.00% of their portfolio | 13.9k $305.8k | Reduced -1.0k |
| DEUTSCHE BANK AG\ 0.00% of their portfolio | 13.2k $292.0k | Added +686 |
| ROYAL BANK OF CANADA 0.00% of their portfolio | 13.0k $287.0k | Reduced -18.6k |
| ALLIANCEBERNSTEIN L.P. 0.00% of their portfolio | 13.0k $170.2k | Reduced -3.2k |
| Intesa Sanpaolo Wealth Management 0.06% of their portfolio | 13.0k $287.0k | Reduced -2.0k |
| HighTower Advisors, LLC 0.00% of their portfolio | 12.7k $279.3k | Added +283 |
| Squarepoint Ops LLC 0.00% of their portfolio | 12.2k $269.1k | New |
| XTX Topco Ltd 0.00% of their portfolio | 12.2k $268.9k | Reduced -8.2k |
| CITIGROUP INC 0.00% of their portfolio | 10.8k $237.8k | Added +8.1k |
| SEB Asset Management AB 0.00% of their portfolio | 9.6k $212.9k | New |
| PRICE T ROWE ASSOCIATES INC /MD/ 0.00% of their portfolio | 9.6k $213.0k | New |
| Wealthfront Advisers LLC 0.00% of their portfolio | 9.5k $210.8k | Reduced -6.7k |
| JPMORGAN CHASE & CO 0.00% of their portfolio | 9.0k $200.1k | Added +2.9k |
| Vanguard Global Advisers, LLC 0.00% of their portfolio | 8.7k $193.2k | Added +4.0k |
| MetLife Investment Management, LLC 0.00% of their portfolio | 8.2k $181.7k | Unchanged |
| Russell Investments Group, Ltd. 0.00% of their portfolio | 8.2k $180.8k | Added +7.2k |
| BARCLAYS PLC 0.00% of their portfolio | 8.0k $176.2k | Reduced -7.6k |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. 0.00% of their portfolio | 6.0k $131.6k | Reduced -254 |
| NEW YORK STATE COMMON RETIREMENT FUND 0.00% of their portfolio | 5.0k $110.4k | Unchanged |
| State of Wyoming 0.01% of their portfolio | 3.7k $81.3k | New |
| JNBA Financial Advisors 0.01% of their portfolio | 3.3k $73.7k | Added +1.7k |
| Police & Firemen's Retirement System of New Jersey 0.00% of their portfolio | 3.1k $68.4k | Unchanged |
| Farther Finance Advisors, LLC 0.00% of their portfolio | 2.7k $60.7k | New |
| Steward Partners Investment Advisory, LLC 0.00% of their portfolio | 2.5k $55.2k | Reduced -2.0k |
| JTC Employer Solutions Trustee Ltd 0.00% of their portfolio | 2.5k $20.0k | Unchanged |
| BNP PARIBAS FINANCIAL MARKETS 0.00% of their portfolio | 2.0k $44.1k | Reduced -7.0k |
| OSAIC HOLDINGS, INC. 0.00% of their portfolio | 2.0k $44.1k | Reduced -339 |
| Maytree Asset Management Ltd 0.02% of their portfolio | 1.6k $36.1k | Reduced -71.8k |
| Caitong International Asset Management Co., Ltd 0.00% of their portfolio | 1.6k $35.7k | Added +304 |
| Tower Research Capital LLC (TRC) 0.00% of their portfolio | 1.6k $34.6k | Added +490 |
| Federation des caisses Desjardins du Quebec 0.00% of their portfolio | 1.5k $32.7k | Added +1.1k |
| Park Place Capital Corp 0.00% of their portfolio | 1.3k $28.7k | Unchanged |
| Legal & General Group Plc 0.00% of their portfolio | 1.2k $25.7k | Unchanged |
| ALBION FINANCIAL GROUP /UT 0.00% of their portfolio | 1.0k $22.1k | Unchanged |
| Ameritas Investment Partners, Inc. 0.00% of their portfolio | 982 $21.7k | Unchanged |
| Atlantic Union Bankshares Corp 0.00% of their portfolio | 977 $21.6k | New |
| FMR LLC 0.00% of their portfolio | 660 $14.6k | Reduced -13.3k |
| IFP Advisors, Inc 0.00% of their portfolio | 610 $13.5k | Unchanged |
| SouthState Bank Corp 0.00% of their portfolio | 600 $13.2k | Unchanged |
| JONES FINANCIAL COMPANIES LLLP 0.00% of their portfolio | 535 $10.7k | Added +225 |
| LANARK FINANCIAL, INC. 0.00% of their portfolio | 500 $11.0k | Added +400 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC 0.00% of their portfolio | 476 $10.5k | Unchanged |
| Accordant Advisory Group Inc 0.01% of their portfolio | 400 $8.8k | Unchanged |
| FIFTH THIRD BANCORP 0.00% of their portfolio | 326 $7.2k | New |
| HUNTINGTON NATIONAL BANK 0.00% of their portfolio | 301 $6.6k | Unchanged |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM 0.00% of their portfolio | 178 $3.9k | Reduced -528 |
| PNC Financial Services Group, Inc. 0.00% of their portfolio | 122 $2.7k | Added +41 |
| GAMMA Investing LLC 0.00% of their portfolio | 49 $1.1k | Reduced -87 |
| Sterling Capital Management LLC 0.00% of their portfolio | 45 $994 | Reduced -341 |
| Fairway Wealth LLC 0.00% of their portfolio | 30 $662 | New |
| NATIONAL BANK OF CANADA /FI/ 0.00% of their portfolio | 6 $132 | New |
| Transamerica Financial Advisors, LLC 0.00% of their portfolio | 5 $110 | New |
| Arax Advisory Partners 0.00% of their portfolio | 4 $88 | New |
| Keating Financial Advisory Services, Inc. 0.00% of their portfolio | 1 $22 | New |