Are insiders buying or selling ASTROTECH Corp stock?

Based on the last 50 SEC Form 4 filings, ASTROTECH Corp insiders made 20 open-market purchases and 2 open-market sales.

Where can I see ASTROTECH Corp insider trading activity?

SEC Form 4 filings for ASTROTECH Corp (ASTC) are publicly available on EDGAR and aggregated at form4api.com/companies/astc.

Company profile

ASTROTECH Corp Insider Trading

Name: ASTROTECH Corp Insider Trading Data
Creator: Form4API
License: https://www.sec.gov/privacy.htm

ASTC

Every SEC Form 4 insider trading filing for ASTROTECH Corp (ASTC) since April 2023 — open-market buys and sells by directors and officers, option exercises, and cluster activity, updated as each filing is reported to the SEC. Why 2023?

Exchange: Nasdaq
Sector: Laboratory Analytical Instruments
CIK: 0001001907
Filings: 58
Insiders: 14
Last filing: 2026-09-01

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Activity summary

Recent insider activity is bullish. Over the last 30 days, 1 insider purchased shares. Buying was led by Charles Arch Winn.

Three year balance

Buy and sell value by quarter, Q4 23 to Q3 26. ASTROTECH Corp insiders are net sellers across the period shown.

PurchasesSales

Bars below the rule are sales, above are purchases. Largest quarter on the chart is $1.6M.

90 day insight

Over the last 90 days, ASTROTECH Corp insiders bought $0 across 10 transactions with no open-market sales.

Most active insider: Charles Arch Winn with 2 transactions totaling $0.

Activity skews bullish — buys outpace sales.

Insider Transactions

Sourced from SEC EDGAR Form 4 filings. Updated hourly.

Date	Insider	Company	Type	Shares	Price	Value	Return
Sep 1, 2026	Charles Arch Winn	ASTC	Award	2,150	—	—	-15.8% 1w
Jul 22, 2026	Nihanth Badugu	ASTC	Award	5,000	—	—	-15.8% 1w
Jul 16, 2026	Matthew Kreps	ASTC	Award	2,150	—	—	+5.9% 1m
Jul 16, 2026	John William Halinski	ASTC	Award	2,150	—	—	-15.8% 1w
Jul 16, 2026	Eric Stober	ASTC	Award	2,150	—	—	-15.8% 1w

45 more transactions hidden

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Top insiders

By total value filed.

Braden Michael Leonard2 filings−$1.6M

Thomas Wiley WilkinsonDirector4 filings+$83K

Robert N McFarlandDirector6 filings+$81K

Daniel T Russler JrDirector4 filings+$63K

James Frank BeckerDirector8 filings+$62K

Institutional Ownership

Top 13F-HR holders of ASTROTECH Corp as of 2026-06-30

— stable

Total reported AUM

$601,025

QoQ change

—

Reporting period

2026-06-30

BlackRock, Inc.

CIK 0002012383

$220,150

20K shares

J. Safra Sarasin Holding AG

CIK 0001890222

$140,049

27K shares

State Street Corp

CIK 0000093751

$120,697

11K shares

Data source: quarterly 13F-HR filings — institutional holders report positions within 45 days of quarter end. Joined with insider activity above — see who's loading up institutionally while insiders are trading. Full 13F-HR API →