Astrotech director granted 2,150 restricted shares

Stober Eric 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

Stober Eric reported acquisition or exercise transactions in this Form 4 filing.

Astrotech Corp director Eric Stober received a grant of 2,150 shares of restricted common stock at $0.00 per share under the Astrotech Corporation 2021 Omnibus Equity Incentive Plan. The shares vest on each of the first three anniversaries of July 16, 2026, becoming fully vested on July 16, 2029, subject to his continuous service. Following this award, he holds 18,487 shares directly.

Insider Trade Summary

Grant/Award: 2,150 shares

Grant/Award 1 txn

Insider Stober Eric

Role Director

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

Holdings After Transaction: Common Stock — 18,487 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 granted: 2,150 shares Grant price per share: $0.00 per share Shares owned after award: 18,487 shares +2 more

5 metrics

Restricted stock granted 2,150 shares Restricted common stock award to director Eric Stober on 2026-07-16

Grant price per share $0.00 per share Stated price for the 2,150 restricted shares granted

Shares owned after award 18,487 shares Total direct Astrotech shares held by Eric Stober following the grant

Vesting period First three anniversaries of July 16, 2026 Restricted stock vests over three anniversaries, fully vested on July 16, 2029

Full vesting date July 16, 2029 Date when 100% of the 2,150 restricted shares become fully vested

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"

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 award did Astrotech Corp (ASTC) grant to Eric Stober?

Astrotech granted director Eric Stober an award of 2,150 shares of restricted common stock. The grant was made under the Astrotech Corporation 2021 Omnibus Equity Incentive Plan and was reported on the Form 4 dated July 16, 2026.

How many Astrotech (ASTC) shares does Eric Stober own after this Form 4 transaction?

After this restricted stock grant, Eric Stober directly owns 18,487 Astrotech shares. This total reflects his holdings following the award of 2,150 restricted shares reported in the Form 4 insider trading disclosure.

What is the vesting schedule for Eric Stober’s 2,150 restricted Astrotech (ASTC) shares?

The 2,150 restricted shares vest on each of the first three anniversaries of July 16, 2026. All shares will be fully vested on July 16, 2029, assuming Eric Stober continues his service with Astrotech through each vesting date.

Did Eric Stober pay for the new Astrotech (ASTC) restricted shares reported on Form 4?

No cash payment was reported; the 2,150 restricted shares were granted at a stated price of $0.00 per share. This indicates a stock award rather than an open-market purchase of Astrotech shares.

Is Eric Stober’s Astrotech (ASTC) restricted stock award contingent on continued service?

Yes. Vesting of the 2,150 restricted shares is subject to Eric Stober’s continuous service with Astrotech. He must remain in service through each anniversary date up to July 16, 2029 for the shares to fully vest.

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

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Accepted by SEC EDGAR 07/20/2026 - 04:18 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^*

Stober Eric

(Last) (First) (Middle)

1817 W. BRAKER LN, STE 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	18,487	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/ Eric Stober	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)