ALMU

insider transactions

Aeluma, Inc. — buys & sells by directors, officers and 10% owners (SEC Form 4).

30D 90D 1Y

Net shares · 365d

-394.5K

0 buy · 394.5K sell

Net value · 365d

-$7.1M

$0 in · $7.1M out

Sentiment · 365d

Net selling

0% buying · 100% selling

Open-market trades · 365d

0 buy · 394.5K sell

Net buy / sell volume

Tap or hover the chart for daily net volume. Green = net buying, red = net selling.

All transactions

Sell·S
Jun 1, 26

Jonathan Klamkin KEY

Chief Executive Officer · 10b5-1

$215.2K

8.2K sh · $26.25

Own -77%
Sell·S
Jun 1, 26

Jonathan Klamkin KEY

Chief Executive Officer · 10b5-1

$40.2K

1.6K sh · $25.12

Own -13%
Sell·S
Jun 1, 26

Jonathan Klamkin KEY

Chief Executive Officer · 10b5-1

$192.6K

7.9K sh · $24.39

Own -39%
Sell·S
Jun 1, 26

Jonathan Klamkin KEY

Chief Executive Officer · 10b5-1

$32.6K

1.4K sh · $23.32

Own -7%
Sell·S
Jun 1, 26

Jonathan Klamkin KEY

Chief Executive Officer · 10b5-1

$20.0K

900 sh · $22.19

Own -4%
Other·G
Jun 1, 26

Jonathan Klamkin KEY

Chief Executive Officer · 10b5-1

$0

20.0K sh

Own -1%
Sell·S
May 20, 26

Steven Denbaars

Director · 10b5-1

$20.1K

942 sh · $21.30

Own -0%
Sell·S
May 20, 26

Steven Denbaars

Director · 10b5-1

$235.7K

11.6K sh · $20.40

Own -3%
Sell·S
May 19, 26

Steven Denbaars

Director · 10b5-1

$104.8K

5.1K sh · $20.61

Own -1%
Sell·S
May 19, 26

Steven Denbaars

Director · 10b5-1

$145.0K

7.4K sh · $19.56

Own -2%
Sell·S
May 1, 26

Jonathan Klamkin KEY

Chief Executive Officer · 10b5-1

$17.4K

676 sh · $25.71

Own -22%
Sell·S
May 1, 26

Jonathan Klamkin KEY

Chief Executive Officer · 10b5-1

$377.8K

15.0K sh · $25.15

Own -83%
Sell·S
May 1, 26

Jonathan Klamkin KEY

Chief Executive Officer · 10b5-1

$104.1K

4.3K sh · $24.20

Own -19%
Other·G
May 1, 26

Jonathan Klamkin KEY

Chief Executive Officer · 10b5-1

$0

20.0K sh

Own -1%
Other·G
Apr 1, 26

Jonathan Klamkin KEY

Chief Executive Officer · 10b5-1

$0

20.0K sh

Own -1%
Sell·S
Apr 1, 26

Jonathan Klamkin KEY

Chief Executive Officer · 10b5-1

$261.9K

20.0K sh · $13.10

Own -1%
Other·G
Mar 4, 26

Jonathan Klamkin KEY

Chief Executive Officer · 10b5-1

$0

50.0K sh

Own -3%
Sell·S
Mar 4, 26

Jonathan Klamkin KEY

Chief Executive Officer · 10b5-1

$401.2K

21.8K sh · $18.41

Own -2%
Sell·S
Mar 4, 26

Jonathan Klamkin KEY

Chief Executive Officer · 10b5-1

$501.4K

28.2K sh · $17.77

Own -2%
Sell·S
Feb 26, 26

Steven Denbaars

Director · 10b5-1

$198.1K

12.5K sh · $15.85

Own -3%
Sell·S
Feb 25, 26

Steven Denbaars

Director · 10b5-1

$219.8K

12.5K sh · $17.58

Own -3%
Sell·S
Feb 4, 26

Mark N. Tompkins

Other

$90.1K

6.0K sh · $15.12

Own -0%
Sell·S
Feb 4, 26

Mark N. Tompkins

Other

$417.6K

28.5K sh · $14.63

Own -2%
Sell·S
Feb 2, 26

Mark N. Tompkins

10% Owner

$590.2K

37.5K sh · $15.74

Own -2%
Sell·S
Jan 30, 26

Mark N. Tompkins

10% Owner

$15.2K

908 sh · $16.79

Own -0%
Sell·S
Jan 30, 26

Mark N. Tompkins

10% Owner

$382.6K

24.1K sh · $15.88

Own -1%
Sell·S
Jan 29, 26

Mark N. Tompkins

10% Owner

$89.3K

5.2K sh · $17.16

Own -0%
Sell·S
Jan 29, 26

Mark N. Tompkins

10% Owner

$457.2K

27.3K sh · $16.75

Own -1%
Sell·S
Jan 22, 26

Mark N. Tompkins

10% Owner

$18.1K

962 sh · $18.81

Own -0%
Sell·S
Jan 22, 26

Mark N. Tompkins

10% Owner

$524.1K

29.0K sh · $18.05

Own -1%
Sell·S
Jan 21, 26

Mark N. Tompkins

10% Owner

$212

10 sh · $21.24

Own -0%
Sell·S
Jan 21, 26

Mark N. Tompkins

10% Owner

$35.1K

1.7K sh · $20.44

Own -0%
Sell·S
Jan 21, 26

Mark N. Tompkins

10% Owner

$249.9K

12.9K sh · $19.30

Own -1%
Sell·S
Jan 21, 26

Mark N. Tompkins

10% Owner

$561.7K

30.3K sh · $18.52

Own -2%
Sell·S
Jan 20, 26

Mark N. Tompkins

10% Owner

$19.2K

888 sh · $21.58

Own -0%
Sell·S
Jan 20, 26

Mark N. Tompkins

10% Owner

$601.5K

29.1K sh · $20.66

Own -1%
Other·G
Dec 29, 25

Jonathan Klamkin KEY

Chief Executive Officer · 10b5-1

$0

1.1M sh

Own -100%
Other·G
Dec 19, 25

Jonathan Klamkin KEY

Chief Executive Officer · 10b5-1

$0

350.0K sh

Own -24%
Grant·A
Dec 3, 25

Steven Denbaars

Director · 10b5-1

$0

10.1K sh

Own +3%
Grant·A
Dec 3, 25

John Kenneth Paglia

Director

$0

10.9K sh

Own +87%
Grant·A
Dec 3, 25

Michael Byron

Director

$0

13.3K sh

Own New
Grant·A
Dec 3, 25

Craig H Ensley

Director

$0

10.6K sh

Own +64%
Grant·A
Sep 1, 25

Michael Byron

Director

$0

3.7K sh

Own New

Date▾	Insider	Role	Type	Shares	Own Δ	Price	Value
Jun 1, 2026	Jonathan Klamkin KEY 10b5-1	Chief Executive Officer	Sell S	8.2K	-77%	$26.25	$215.2K
Jun 1, 2026	Jonathan Klamkin KEY 10b5-1	Chief Executive Officer	Sell S	1.6K	-13%	$25.12	$40.2K
Jun 1, 2026	Jonathan Klamkin KEY 10b5-1	Chief Executive Officer	Sell S	7.9K	-39%	$24.39	$192.6K
Jun 1, 2026	Jonathan Klamkin KEY 10b5-1	Chief Executive Officer	Sell S	1.4K	-7%	$23.32	$32.6K
Jun 1, 2026	Jonathan Klamkin KEY 10b5-1	Chief Executive Officer	Sell S	900	-4%	$22.19	$20.0K
Jun 1, 2026	Jonathan Klamkin KEY 10b5-1	Chief Executive Officer	Other G	20.0K	-1%	—	$0
May 20, 2026	Steven Denbaars 10b5-1	Director	Sell S	942	-0%	$21.30	$20.1K
May 20, 2026	Steven Denbaars 10b5-1	Director	Sell S	11.6K	-3%	$20.40	$235.7K
May 19, 2026	Steven Denbaars 10b5-1	Director	Sell S	5.1K	-1%	$20.61	$104.8K
May 19, 2026	Steven Denbaars 10b5-1	Director	Sell S	7.4K	-2%	$19.56	$145.0K
May 1, 2026	Jonathan Klamkin KEY 10b5-1	Chief Executive Officer	Sell S	676	-22%	$25.71	$17.4K
May 1, 2026	Jonathan Klamkin KEY 10b5-1	Chief Executive Officer	Sell S	15.0K	-83%	$25.15	$377.8K
May 1, 2026	Jonathan Klamkin KEY 10b5-1	Chief Executive Officer	Sell S	4.3K	-19%	$24.20	$104.1K
May 1, 2026	Jonathan Klamkin KEY 10b5-1	Chief Executive Officer	Other G	20.0K	-1%	—	$0
Apr 1, 2026	Jonathan Klamkin KEY 10b5-1	Chief Executive Officer	Other G	20.0K	-1%	—	$0
Apr 1, 2026	Jonathan Klamkin KEY 10b5-1	Chief Executive Officer	Sell S	20.0K	-1%	$13.10	$261.9K
Mar 4, 2026	Jonathan Klamkin KEY 10b5-1	Chief Executive Officer	Other G	50.0K	-3%	—	$0
Mar 4, 2026	Jonathan Klamkin KEY 10b5-1	Chief Executive Officer	Sell S	21.8K	-2%	$18.41	$401.2K
Mar 4, 2026	Jonathan Klamkin KEY 10b5-1	Chief Executive Officer	Sell S	28.2K	-2%	$17.77	$501.4K
Feb 26, 2026	Steven Denbaars 10b5-1	Director	Sell S	12.5K	-3%	$15.85	$198.1K
Feb 25, 2026	Steven Denbaars 10b5-1	Director	Sell S	12.5K	-3%	$17.58	$219.8K
Feb 4, 2026	Mark N. Tompkins	Other	Sell S	6.0K	-0%	$15.12	$90.1K
Feb 4, 2026	Mark N. Tompkins	Other	Sell S	28.5K	-2%	$14.63	$417.6K
Feb 2, 2026	Mark N. Tompkins	10% Owner	Sell S	37.5K	-2%	$15.74	$590.2K
Jan 30, 2026	Mark N. Tompkins	10% Owner	Sell S	908	-0%	$16.79	$15.2K
Jan 30, 2026	Mark N. Tompkins	10% Owner	Sell S	24.1K	-1%	$15.88	$382.6K
Jan 29, 2026	Mark N. Tompkins	10% Owner	Sell S	5.2K	-0%	$17.16	$89.3K
Jan 29, 2026	Mark N. Tompkins	10% Owner	Sell S	27.3K	-1%	$16.75	$457.2K
Jan 22, 2026	Mark N. Tompkins	10% Owner	Sell S	962	-0%	$18.81	$18.1K
Jan 22, 2026	Mark N. Tompkins	10% Owner	Sell S	29.0K	-1%	$18.05	$524.1K
Jan 21, 2026	Mark N. Tompkins	10% Owner	Sell S	10	-0%	$21.24	$212
Jan 21, 2026	Mark N. Tompkins	10% Owner	Sell S	1.7K	-0%	$20.44	$35.1K
Jan 21, 2026	Mark N. Tompkins	10% Owner	Sell S	12.9K	-1%	$19.30	$249.9K
Jan 21, 2026	Mark N. Tompkins	10% Owner	Sell S	30.3K	-2%	$18.52	$561.7K
Jan 20, 2026	Mark N. Tompkins	10% Owner	Sell S	888	-0%	$21.58	$19.2K
Jan 20, 2026	Mark N. Tompkins	10% Owner	Sell S	29.1K	-1%	$20.66	$601.5K
Dec 29, 2025	Jonathan Klamkin KEY 10b5-1	Chief Executive Officer	Other G	1.1M	-100%	—	$0
Dec 19, 2025	Jonathan Klamkin KEY 10b5-1	Chief Executive Officer	Other G	350.0K	-24%	—	$0
Dec 3, 2025	Steven Denbaars 10b5-1	Director	Grant A	10.1K	+3%	—	$0
Dec 3, 2025	John Kenneth Paglia	Director	Grant A	10.9K	+87%	—	$0
Dec 3, 2025	Michael Byron	Director	Grant A	13.3K	New	—	$0
Dec 3, 2025	Craig H Ensley	Director	Grant A	10.6K	+64%	—	$0
Sep 1, 2025	Michael Byron	Director	Grant A	3.7K	New	—	$0

About ALMU insider trading

This page tracks insider transactions for Aeluma, Inc. (ALMU) reported to the U.S. Securities and Exchange Commission on Form 4. Corporate insiders — directors, executive officers and beneficial owners of more than 10% of the stock — must disclose their trades within two business days. Open-market purchases (code P) and sales (code S) made at the insider's discretion are the most-watched opportunistic signals, while awards (A), option exercises (M) and tax-withholding (F) reflect compensation rather than conviction. Trades marked 10b5-1 were made under a pre-arranged plan and are considered routine. A cluster buy — several insiders buying within a short window — is historically a stronger bullish indicator than any single trade.