Astrotech director granted 2,150 restricted shares

Halinski John William reported acquisition or exercise transactions in this Form 4 filing.

The filer has since corrected this document, so the figures below are the ones originally reported and some of them may have changed. Read the amended Form 4/A for what the company says now.

Rhea-AI Filing Summary

Halinski John William reported acquisition or exercise transactions in this Form 4 filing.

Astrotech Corp granted director John William Halinski 2,150 shares of restricted common stock under the Astrotech Corporation 2021 Omnibus Equity Incentive Plan. The award vests on each of the first three anniversaries of July 16, 2026, fully vesting July 16, 2029. After this grant, Halinski directly holds 11,156 common shares.

Insider Trade Summary

Grant/Award: 2,150 shares

Grant/Award 1 txn

Insider Halinski John William

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Common Stock F1	2,150	$0.00	$0.00

Holdings After Transaction: Common Stock — 11,156 shares (Direct)

Footnotes (1)

1. F1. Represents shares of restricted stock granted to the Reporting Person pursuant to the Astrotech Corporation 2021 Omnibus Equity Incentive Plan. The shares of restricted stock vest on each of the first three anniversaries of July 16, 2026, such that 100% of the shares of restricted stock shall be fully vested on July 16, 2029, subject to the Reporting Person's continuous service with the Issuer through each such applicable anniversary.

Key Figures

Restricted stock grant: 2,150 shares Post-grant holdings: 11,156 shares Transaction price: 0.0000 per share

3 metrics

Restricted stock grant 2,150 shares Restricted common stock awarded to director John William Halinski on July 16, 2026

Post-grant holdings 11,156 shares Total direct common stock beneficially owned by Halinski after the grant

Transaction price 0.0000 per share Reported transaction price per share for the restricted stock award

Key Terms

restricted stock, 2021 Omnibus Equity Incentive Plan, continuous service

3 terms

restricted stock financial

"Represents shares of restricted stock granted to the Reporting Person pursuant to the Astrotech Corporation 2021 Omnibus Equity Incentive Plan"

Shares granted to an individual that carry limits on transfer or sale until certain conditions are met, such as staying with the company for a set time or hitting performance targets. Think of them as a locked gift that gradually opens; for investors they matter because they affect how many shares may enter the market later, signal management incentives and potential dilution, and reveal confidence in future company performance.

2021 Omnibus Equity Incentive Plan financial

"granted to the Reporting Person pursuant to the Astrotech Corporation 2021 Omnibus Equity Incentive Plan"

continuous service financial

"subject to the Reporting Person's continuous service with the Issuer through each such applicable anniversary"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transaction did Astrotech Corp (ASTC) report for John William Halinski?

Astrotech Corp reported that director John William Halinski received a grant of 2,150 shares of restricted common stock. The award was issued under the company’s 2021 Omnibus Equity Incentive Plan as equity-based director compensation rather than an open-market share purchase.

How many Astrotech Corp (ASTC) shares does John William Halinski own after this Form 4?

Following the restricted stock grant, John William Halinski directly owns 11,156 shares of Astrotech Corp common stock. This figure, disclosed in the Form 4, reflects his total direct beneficial ownership after adding the 2,150 newly awarded restricted shares.

What are the vesting terms of the 2,150 restricted shares at Astrotech Corp (ASTC)?

The 2,150 restricted shares granted to Halinski vest on each of the first three anniversaries of July 16, 2026. All shares are scheduled to be fully vested on July 16, 2029, conditioned on his continuous service with Astrotech Corp through each vesting date.

Under which plan were the restricted shares granted to the Astrotech Corp (ASTC) director?

The restricted stock awarded to John William Halinski was granted under the Astrotech Corporation 2021 Omnibus Equity Incentive Plan. This plan provides for equity-based compensation, and the disclosed 2,150-share grant is one such award to a company director.

Does the Astrotech Corp (ASTC) restricted stock grant require continued service to vest?

Yes. The footnote states that vesting of the 2,150 restricted shares is subject to Halinski’s continuous service with Astrotech Corp through each applicable anniversary date, with all shares becoming fully vested on July 16, 2029 if this condition is met.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 07/20/2026 - 04:19 PM EDT Learn about SEC filing dates

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Halinski John William

(Last) (First) (Middle)

1817 W. BRAKER LN.

SUITE 400

(Street)

AUSTIN TEXAS 78758

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
ASTROTECH Corp [ ASTC ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
07/16/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	07/16/2026		A		2,150(1)	A	$0	11,156	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. Represents shares of restricted stock granted to the Reporting Person pursuant to the Astrotech Corporation 2021 Omnibus Equity Incentive Plan. The shares of restricted stock vest on each of the first three anniversaries of July 16, 2026, such that 100% of the shares of restricted stock shall be fully vested on July 16, 2029, subject to the Reporting Person's continuous service with the Issuer through each such applicable anniversary.

	/s/ John William Halinski	07/20/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)