ALMU · NASDAQ · Semiconductors

Aeluma (ALMU)

Develops compound-semiconductor devices for sensing, communication, and computing.

$13.85
After hours−0.05 (−0.36%)
At close$13.90(+2.13%)

13F · 13D/G · Form 4

Institutions≈ 29.86%5.47M shares
107 holders · as of Jun 30, 2026 · largest filers plus last quarter's tail
Insiders30.08%5.51M shares
8 holders · as of Aug 28, 2026
Other≈ 40.06%7.33M shares
remainder

18.31M company shares as of Sep 22, 2026 · institutions as of Jun 30, 2026 · holders as of their latest filing

This quarter's institutional total failed a plausibility check; shown: the largest filers plus last quarter's remainder.

13F · 13D/G · Form 4

HolderStakeSharesDate
Mark N. Tompkins1Insiderother: Former 10% Owner
9.78%1.79Mfiled Feb 5, 2026
Jonathan KlamkinInsiderdirector, officer: Chief Executive Officer
7.26%1.33Mfiled Aug 5, 2026
Perry George HerbertInsider
5.46%1.00Mfiled Mar 31, 2026
Lee McCarthy2Insider10 percent owner
5.34%977,425filed Jan 2, 2026
BlackRock, Inc.Institution
5.32%973,235as of Jun 30, 2026
D. E. Shaw & Co., Inc.Institution
4.36%797,983as of Jun 30, 2026
Vanguard Capital Management LLCInstitution
3.14%574,417as of Jun 30, 2026
Millennium Management LLCInstitution
2.89%529,005as of Jun 30, 2026
Steven DenbaarsInsiderdirector
1.89%345,209filed Aug 28, 2026
Geode Capital Management, LLCInstitution
1.74%318,018as of Jun 30, 2026
State Street CorpInstitution
1.39%254,168as of Jun 30, 2026
Apis Capital Advisors, LLCInstitution
1.06%194,000as of Jun 30, 2026
Awm Investment Company, Inc.Institution
0.72%131,404as of Jun 30, 2026
Northern Trust CorpInstitution
0.67%123,505as of Jun 30, 2026
Vanguard Portfolio Management LLCInstitution
0.61%112,400as of Jun 30, 2026
Marshall Wace, LLPInstitution
0.52%95,964as of Jun 30, 2026
Bank of New York Mellon CorpInstitution
0.51%92,697as of Jun 30, 2026
Lazard Asset Management LLCInstitution
0.49%90,586as of Jun 30, 2026
Vanguard Fiduciary Trust CoInstitution
0.46%84,175as of Jun 30, 2026
Westside Investment Management, Inc.Institution
0.29%52,575as of Jun 30, 2026
Wedbush Securities IncInstitution
0.28%51,425as of Jun 30, 2026
UBS Group AGInstitution
0.26%47,078as of Jun 30, 2026
Citadel Advisors LLCInstitution
0.23%41,219as of Jun 30, 2026
Morgan StanleyInstitution
0.22%41,155as of Jun 30, 2026
LPL Financial LLCInstitution
0.21%38,878as of Jun 30, 2026
  1. Reported at 4.83% on May 15, 2026, under the 5% line, so no further filing is required.
  2. Reported at 1.50% on Jan 2, 2026, under the 5% line, so no further filing is required.

13F, as of Jun 30, 2026

107 holders · 5.47M shares · 21 new positions · 55 increased · 29 reduced · 12 closed

HolderShares% outstandingChg q/qFiled
BlackRock, Inc.973.2K5.32%+113.5KAug 7, 2026
D. E. Shaw & Co., Inc.798.0K4.36%+773.0KAug 14, 2026
Vanguard Capital Management LLC574.4K3.14%−14.3KAug 13, 2026
Millennium Management LLC529.0K2.89%+130.7KAug 14, 2026
Geode Capital Management, LLC318.0K1.74%+22.7KAug 12, 2026
State Street Corp254.2K1.39%+6.8KAug 7, 2026
Apis Capital Advisors, LLC194.0K1.06%−12.0KAug 14, 2026
Awm Investment Company, Inc.131.4K0.72%−68.6KAug 14, 2026

13D/G · 5% or more, as filed

Holder% of classSharesFormFiled
Perry George Herbert5.60%1.00M13GMar 31, 2026
BlackRock, Inc.5.30%963.8K13GJul 27, 2026

Form 4

Latest trades

DateInsiderTypeSharesAvg priceOwned after
Aug 27, 2026
Steven Denbaarsdirector
Sale12,500$13.82345,209
Aug 26, 2026
Steven Denbaarsdirector
Sale12,500$13.84357,709
Aug 3, 2026
Jonathan Klamkindirector, officer: Chief Executive Officer
Sale · 2 lots20,000$16.732,403
Jul 1, 2026
Jonathan Klamkindirector, officer: Chief Executive Officer
Sale · 2 lots20,000$21.082,403
May 20, 2026
Steven Denbaarsdirector
Sale · 2 lots12,500$20.46370,209
May 19, 2026
Steven Denbaarsdirector
Sale · 2 lots12,500$19.99382,709
May 1, 2026
Jonathan Klamkindirector, officer: Chief Executive Officer
Sale · 3 lots20,000$24.962,403
Apr 1, 2026
Jonathan Klamkindirector, officer: Chief Executive Officer
Sale20,000$13.101,409,398
Mar 4, 2026
Jonathan Klamkindirector, 10 percent owner, officer: Chief Executive Officer
Sale · 2 lots50,000$18.051,429,398
Feb 26, 2026
Steven Denbaarsdirector
Sale12,500$15.85385,088

House and Senate disclosures

Not reported.