$ASTC

$5.23 +$0.22 (4.39%) Close

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

Ownership

13F as of Q2 2026 · 2.0M shares outstanding

Who owns ASTC?

By type of holder

Institutions 8.6% Insiders 37.9% Everyone else 53.6%

Concentration Top 10 holders own 42.0%

Leonard Braden Michael 21.5% · Pickens Thomas Boone III 9.0%

Institutional ownership

8.6%

+2.9 pts vs last qtr

Institutional holders

+2 vs last qtr

Net shares bought

+59.0K

by institutions in Q2 2026

New / sold out

4 / 2

positions opened vs closed

How is ownership changing?

Institutions, last 8 quarters

Biggest buyers in Q2 2026

Jane Street Group, LLC NEW +54.8K
Vanguard Capital Management LLC +13.2K

Biggest sellers in Q2 2026

T3 Companies, LLC SOLD OUT −13.4K
Caitong International Asset Management Co., Ltd −4.0K

Who is planning to sell?

No insider has filed a notice of proposed sale (Form 144) for Astrotech Corp in the last 12 months.

Is your stake being diluted?

Diluted share count, FY2011–FY2014

+9.3%

+3.02% a year

Each share's claim on the business

−8.5%

shrank without buying or selling a share

Spent on buybacks vs paid in stock

— vs $2.88M

over 4 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 years39% 1–3 years6% Under 1 year55%

Quarterly turnover

47.9%

of institutional shares changed hands

Top 10 managers, median time held

3.5 years

Super Investors

Investment managers reporting ASTC on Form 13F

Holder	Shares	% of company	Change vs last qtr	Held since	% of their book
JS Jane Street Group, LLC	54.8K	2.73%	NEW	Q2 '26	0.0%
Shares held by quarter Peak holding54.8K (Q2'26) Change over 8 quarters+54.8K Share of the company2.730% Jane Street Group, LLC's full portfolio →
JS J. Safra Sarasin Holding AG	27.3K	1.36%	Unchanged	Q1 '26	0.0%
Shares held by quarter Peak holding27.3K (Q1'26) Change over 8 quarters+27.3K Share of the company1.360% J. Safra Sarasin Holding AG's full portfolio →

Jane Street Group, LLC

54.8K

% of company

2.73%

Change vs last qtr

NEW

Held since

Q2 '26

J. Safra Sarasin Holding AG

27.3K

% of company

1.36%

Change vs last qtr

Unchanged

Held since

Q1 '26

17 more super investors behind a free account

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

Institutional Funds

Mutual funds and ETFs reporting ASTC on Form N-PORT; together they hold 2.0% of the company

Fund	Position value	Shares	% of company	% of the fund	As of
VE Vanguard Extended Market Index Fund Vanguard Index Funds	$244K	22.4K	1.11%	0.00%	June 30, 2026
FE Fidelity Extended Market Index Fund Fidelity Concord Street Trust	$68.6K	9.6K	0.48%	0.00%	August 31, 2026

Vanguard Extended Market Index Fund

Vanguard Index Funds

Position value

$244K

% of company

1.11%

% of the fund

0.00%

As of

June 30, 2026

Fidelity Extended Market Index Fund

Fidelity Concord Street Trust

Position value

$68.6K

% of company

0.48%

% of the fund

0.00%

As of

August 31, 2026

4 more funds behind a free account

See every fund holding Astrotech Corp 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
LB Leonard Braden Michael Insider	432.0K	21.50%	—	—	—	—
Insider holdings come from Form 3/4/5 filings, which are not quarterly. Share of the company21.500% Leonard Braden Michael's insider activity →
PT Pickens Thomas Boone III Insider	181.4K	9.03%	—	—	—	—
Insider holdings come from Form 3/4/5 filings, which are not quarterly. Share of the company9.030% Pickens Thomas Boone III's insider activity →

Leonard Braden Michael

Insider

432.0K

% of company

21.50%

Change vs last qtr

—

Held since

—

Pickens Thomas Boone III

Insider

181.4K

% of company

9.03%

Change vs last qtr

—

Held since

—

8 more holders behind a free account

See every insider and 5%+ holder of Astrotech Corp.

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