Amendment to Statement of Changes in Beneficial Ownership (Form 4/A)

FORM 4 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 that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940

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(Print or Type Responses)

1. Name and Address of Reporting Person * Stober Eric 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) (Last) (First) (Middle) 1817 W. BRAKER LN, STE 400 3. Date of Earliest Transaction (Month/Day/Year) 07/16/2026 (Street) AUSTIN, TX 78758 4. If Amendment, Date Original Filed (Month/Day/Year) 07/20/2026 6. Individual or Joint/Group Filing (Check Applicable Line) _X_ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person (City) (State) (Zip) 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 19,654 D

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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 Underlying Securities (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 of Derivative Security: 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

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Stober Eric 1817 W. BRAKER LN, STE 400 AUSTIN, TX 78758	X

Signatures

/s/ Eric Stober		09/08/2026
**Signature of Reporting Person		Date

Explanation of Responses:

*	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).
(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 December 13, 2024, such that 100% of the shares of restricted stock shall be fully vested on December 13, 2027, subject to the Reporting Person's continuous service with the Issuer through each such applicable anniversary.
Remarks: The original Form 4, filed on July 20, 2026, is being amended to correct the ownership total in Table I, Column 5 to reflect 19,654 shares beneficially owned by the Reporting Person following the reported transaction and correct the vesting periods of the grant of restricted stock. The original Form 4 understated the ownership total in Table I, Column 5 by 1,167 shares due to an administrative error. In addition, the original Form 4 erroneously indicated that the shares of restricted stock would vest in equal installments on each of the first three anniversaries of July 16, 2026, when, as reported in this amendment the shares of restricted stock vest on each of the first three anniversaries of December 13, 2024, such that 100% of the shares of restricted stock granted shall be fully vested on December 13, 2027.

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