$ALMU

$6.61 -$0.30 (4.34%) Close

$ALMU Overview Financial Statements SEC Filings Executives News Red Flags Capital Raising Ownership Insider Transactions Congressional Trades

Ownership

13F as of Q2 2026 · 19.3M shares outstanding

Who owns ALMU?

By type of holder

Institutions 28.2% Insiders 18.0% Everyone else 53.9%

Concentration Top 10 holders own 36.4%

Tompkins Mark N. 9.3% · Klamkin Jonathan 6.1%

Institutional ownership

28.2%

+2.7 pts vs last qtr

Institutional holders

+7 vs last qtr

Net shares bought

+524.9K

by institutions in Q2 2026

New / sold out

20 / 13

positions opened vs closed

How is ownership changing?

Institutions, last 8 quarters

Biggest buyers in Q2 2026

D. E. Shaw & Co., Inc. +773.0K
Millennium Management LLC +130.7K

Biggest sellers in Q2 2026

Raymond James Financial Inc SOLD OUT −267.6K
Polar Asset Management Partners Inc. SOLD OUT −91.0K

Who is planning to sell?

Notices of proposed sale, last 12 months

$6.73M

7 notices from 3 people

Shares covered

425.0K

2.21% of the company

Arranged in advance

100%

of the value is under a 10b5-1 plan

Under a 10b5-1 plan No plan

Largest proposed sellers

Jonathan Klamkin Director 10b5-1 $3M
Klamkin Drelle Gelasca Family Trust dated 08/28/2025 Director 10b5-1 $2.41M

Every notice on Red Flags →

A Form 144 is notice of a planned sale, not the sale itself. What insiders actually sold is on Insider Transactions.

Is your stake being diluted?

Diluted share count, FY2020–FY2026

+3051.3%

+99.39% a year

Each share's claim on the business

−96.8%

shrank without buying or selling a share

Spent on buybacks vs paid in stock

$4K vs $7.8M

over 6 fiscal years

Diluted shares, split-adjusted

Buybacks Stock-based comp

How patient are the owners?

Institutional shares by how long they've been held

5+ years0% 3–5 years0% 1–3 years57% Under 1 year43%

Quarterly turnover

26.5%

of institutional shares changed hands

Top 10 managers, median time held

1 year

Super Investors

Investment managers reporting ALMU on Form 13F

Holder	Shares	% of company	Change vs last qtr	Held since	% of their book
B BlackRock, Inc.	973.2K	5.05%	+113.5K (+13.2%)	2025	0.0%
Shares held by quarter Peak holding973.2K (Q2'26) Change over 8 quarters+973.2K Share of the company5.050% BlackRock, Inc.'s full portfolio →
DE D. E. Shaw & Co., Inc.	798.0K	4.14%	+773.0K (+3091.9%)	Q1 '26	0.0%
Shares held by quarter Peak holding798.0K (Q2'26) Change over 8 quarters+798.0K Share of the company4.140% D. E. Shaw & Co., Inc.'s full portfolio →

BlackRock, Inc.

973.2K

% of company

5.05%

Change vs last qtr

+113.5K (+13.2%)

Held since

2025

D. E. Shaw & Co., Inc.

798.0K

% of company

4.14%

Change vs last qtr

+773.0K (+3091.9%)

Held since

Q1 '26

28 more super investors behind a free account

See every manager holding Aeluma Inc, how their position has changed, and how long they've held it.

Institutional Funds

Mutual funds and ETFs reporting ALMU on Form N-PORT; together they hold 9.7% of the company

Fund	Position value	Shares	% of company	% of the fund	As of
VT Vanguard Total Stock Market Index Fund Vanguard Index Funds	$9.46M	428.4K	2.22%	0.00%	June 30, 2026
IR iShares Russell 2000 ETF iShares Trust	$7.56M	342.6K	1.78%	0.01%	June 30, 2026

Vanguard Total Stock Market Index Fund

Vanguard Index Funds

Position value

$9.46M

% of company

2.22%

% of the fund

0.00%

As of

June 30, 2026

iShares Russell 2000 ETF

iShares Trust

Position value

$7.56M

% of company

1.78%

% of the fund

0.01%

As of

June 30, 2026

23 more funds behind a free account

See every fund holding Aeluma Inc and how much of the fund the position is.

Insiders and 5%+ holders

From Forms 3/4/5 and Schedules 13D/G

Holder	Shares	% of company	Change vs last qtr	8 quarters	Held since	% of their book
TM Tompkins Mark N. Insider	1.8M	9.29%	—	—	—	—
Insider holdings come from Form 3/4/5 filings, which are not quarterly. Share of the company9.290% Tompkins Mark N.'s insider activity →
KJ Klamkin Jonathan Insider	1.2M	6.07%	—	—	—	—
Insider holdings come from Form 3/4/5 filings, which are not quarterly. Share of the company6.070% Klamkin Jonathan's insider activity →

Tompkins Mark N.

Insider

1.8M

% of company

9.29%

Change vs last qtr

—

Held since

—

Klamkin Jonathan

Insider

1.2M

% of company

6.07%

Change vs last qtr

—

Held since

—

6 more holders behind a free account

See every insider and 5%+ holder of Aeluma Inc.

Comments