ALMU · Insider Trading

Aeluma, Inc. Common Stock

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Every open-market purchase and sale reported by ALMU officers, directors and 10%+ beneficial owners on SEC Form 4, which must be filed within two business days of the transaction. Sales often reflect scheduled 10b5-1 plans or tax withholding rather than a directional view, so read counts alongside the size and the filer.

Form 4 Filings

most recent

Open-Market Buys

code P

Sales

code S

Reporting Insiders

current holders

ALMU — Recent Form 4 Transactions (latest 2026-10-14)

Filed	Insider	Role	Type	Shares	Value
2026-10-14	Jonathan Klamkin	Chief Executive Officer	Sell	−100,000	−$1.05M
2026-10-01	Christopher P. Stewart	Chief Financial Officer	F	−5,697	−$70.41K
2026-09-23	Michael Byron	Director	M	+25,000	+$148.25K
2026-09-23	Christopher P. Stewart	Chief Financial Officer	MIXED	+18,478	−$19.73K
2026-09-23	Jonathan Klamkin	Chief Executive Officer	MIXED	−60,101	−$1.40M
2026-08-28	Steven Denbaars	Director	Sell	−25,000	−$345.74K
2026-08-28	Steven Denbaars	Director	Sell	−25,000	−$345.74K
2026-08-05	Jonathan Klamkin	Chief Executive Officer	MIXED	−20,000	−$334.64K
2026-07-02	Jonathan Klamkin	Chief Executive Officer	MIXED	−20,000	−$421.67K
2026-06-03	Jonathan Klamkin	Chief Executive Officer	MIXED	−20,000	−$500.66K
2026-05-21	Steven Denbaars	Director	Sell	−25,000	−$505.63K
2026-05-05	Jonathan Klamkin	Chief Executive Officer	MIXED	−20,000	−$499.27K
2026-04-03	Jonathan Klamkin	Chief Executive Officer	Sell	−20,000	−$261.95K
2026-03-05	Jonathan Klamkin	Chief Executive Officer	Sell	−50,000	−$902.60K
2026-03-02	Steven Denbaars	Director	A	+10,121	—
2026-03-02	Craig H Ensley	Director	A	+10,633	—
2026-03-02	John Kenneth Paglia	Director	A	+10,861	—
2026-03-02	Michael Byron	Director	A	+13,343	—
2026-02-27	Steven Denbaars	Director	Sell	−25,000	−$417.86K
2026-02-05	Mark N. Tompkins	—	Sell	−34,500	−$507.65K
2026-02-02	Mark N. Tompkins	10%+ Owner	Sell	−95,000	−$1.53M
2026-01-22	Mark N. Tompkins	10%+ Owner	Sell	−105,000	−$2.01M
2026-01-02	Lee McCarthy	10%+ Owner	Sell	−649,570	−$3.96K
2025-12-29	Mark N. Tompkins	10%+ Owner	Sell	−60,000	−$997.44K
2025-12-22	Mark N. Tompkins	10%+ Owner	Sell	−85,000	−$1.25M
2025-12-11	Mark N. Tompkins	10%+ Owner	Sell	−50,000	−$854.32K
2025-12-09	Mark N. Tompkins	10%+ Owner	Sell	−100,000	−$1.61M
2025-10-21	Mark N. Tompkins	10%+ Owner	Sell	−77,500	−$1.29M
2025-10-17	Mark N. Tompkins	10%+ Owner	Sell	−65,000	−$1.31M
2025-10-14	Mark N. Tompkins	10%+ Owner	Sell	−107,186	−$1.92M
2025-10-09	Mark N. Tompkins	10%+ Owner	Sell	−106,908	−$1.84M
2025-10-06	Mark N. Tompkins	10%+ Owner	Sell	−33,800	−$546.88K
2025-10-06	Mark N. Tompkins	10%+ Owner	Sell	−129,751	−$2.34M
2025-10-02	Mark N. Tompkins	10%+ Owner	Sell	−109,080	−$1.83M
2025-09-09	Jonathan Klamkin	Chief Executive Officer	MIXED	−147,597	−$2.79M
2025-08-14	Jonathan Klamkin	Chief Executive Officer	MIXED	−147,597	−$2.79M
2025-05-23	Steven Denbaars	Director	A	+84,663 deriv.	—
2025-05-23	John Kenneth Paglia	Director	A	+87,973 deriv.	—
2025-05-23	Craig H Ensley	Director	A	+85,885 deriv.	—
2025-03-31	Mark N. Tompkins	10%+ Owner	C	+200,000	+$700.00K

ALMU — Current Insider Holders

Insider	Role	Shares Held	Value
Mark N. Tompkins	10%+ Owner	1,796,444	$14.01M
Jonathan Klamkin	Chief Executive Officer	1,169,297	$9.12M
Lee McCarthy	10%+ Owner	977,425	$7.62M
Steven Denbaars	Director	357,709	$2.79M
Christopher P. Stewart	Chief Financial Officer	67,781	$528.69K
Michael Byron	Director	38,343	$299.08K
Craig H Ensley	Director	27,300	$212.94K
John Kenneth Paglia	Director	23,361	$182.22K

ALMU Insider Trading FAQ

Who are the insiders at ALMU?

8 officers, directors and 10%+ beneficial owners currently report holdings in ALMU via SEC Form 4.

Are ALMU insiders buying or selling?

Across the 40 most recent Form 4 filings for ALMU, 0 were open-market purchases (code P) and 22 were sales (code S). Sales frequently reflect scheduled 10b5-1 plans or tax withholding rather than a view on the stock.

How current is ALMU insider data?

Form 4 must be filed within two business days of the transaction, so this is close to real time. The most recent ALMU filing is dated 2026-10-14.

How to read Form 4 activity

Form 4 reports a change in beneficial ownership by an officer, director or 10%+ holder, and must be filed within two business days of the transaction — so this is close to real time, unlike the 45-day-lagged 13F institutional data.

Transaction codes matter more than the raw buy/sell count. Code P is an open-market purchase — an insider choosing to buy with their own money, which is the signal most research treats as informative. Code S is a sale, but sales are frequently pre-scheduled under a 10b5-1 plan or cover tax withholding on vesting equity, so a run of sales often says nothing directional. Codes A and M are grants and option exercises rather than open-market decisions.

Full filing history and per-insider positions are on the ALMU quote page; the site-wide leaderboard is on the insider transactions hub.