John William Halinski - 14 Apr 2026 Form 4 Insider Report for ASTROTECH Corp (ASTC)

Reporting relationship: Director
Issuer ticker: ASTC
Reported as of: 14 Apr 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 18 May 2026, 20:22:36 UTC
Prior SEC filing: 16 May 2025
Source filing: View source filing
Reporting owner signature: /s/ John Halinski

Key filing fact

John William Halinski filed Form 4 for ASTROTECH Corp (ASTC) on 18 May 2026.

Key facts

This page summarizes John William Halinski's Form 4 filing for ASTROTECH Corp (ASTC).
1 reported transaction and 0 derivative rows are listed below.
Accepted by SEC: 18 May 2026, 20:22.

Change

Previous filing in this sequence was filed on 16 May 2025.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0002049376 Primary reporting owner

Halinski John William

Relationship: Director
Address: 1817 W. BRAKER LN., SUITE 400, AUSTIN
Signature: /s/ John Halinski
Signature date: 18 May 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

ASTC transaction

Common Stock

Award

Transaction value
Shares: +6,006
Change %: +200%
Price: $0.000000^*
Shares after: 9,006
Date: 14 May 2025
Ownership: Direct
Footnotes: F1

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 1 footnote

Footnote F1

Represents shares of restricted stock granted to the Reporting Person pursuant to the Astrotech Corporation 2021 Omnibus Equity Incentive Plan. 100% of the shares of restricted stock vested immediately on the grant date.