Amtech Systems (ASYS) director boosts stake through RSU grant and conversion

Rhea-AI Filing Summary

Amtech Systems, Inc. director Michael M. Ludwig reported equity awards tied to company stock. On March 5, 2026, he exercised or converted 8,081 Restricted Stock Units into 8,081 shares of Amtech Systems, Inc. common stock at a stated price of $0.00 per share.

After this transaction, his directly held common stock position was 33,069 shares. On March 4, 2026, he also received a grant of 2,839 Restricted Stock Units at a stated price of $0.00 per unit, each representing the contingent right to receive one share of Amtech Systems, Inc. common stock.

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

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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^*

LUDWIG MICHAEL M

(Last) (First) (Middle)

C/O AMTECH SYSTEMS, INC.

58 S. RIVER DRIVE, SUITE 370

(Street)

TEMPE AZ 85288

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
AMTECH SYSTEMS INC [ ASYS ]

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

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

3. Date of Earliest Transaction (Month/Day/Year)
03/04/2026

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

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

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

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
Amtech Systems, Inc. $0.01 par value common stock	03/05/2026		M		8,081	A	$0	33,069	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
Restricted Stock Units	(1)	03/04/2026		A		2,839		03/04/2027	03/04/2027	Amtech Systems, Inc. $0.01 par value common stock	2,839	$0	2,839	D
Restricted Stock Units	(1)	03/05/2026		M			8,081	03/05/2026	03/05/2026	Amtech Systems, Inc. $0.01 par value common stock	8,081	$0	2,839	D

Explanation of Responses:

1. Each restricted stock unit represents a contingent right to receive one share of Common Stock of Amtech Systems, Inc.

	/s/ Mark Weaver, by power of attorney	03/06/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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FAQ

What insider transactions did Amtech Systems (ASYS) director Michael M. Ludwig report?

Michael M. Ludwig reported equity-related acquisitions in Amtech Systems, Inc. He exercised or converted 8,081 Restricted Stock Units into 8,081 common shares and separately received a grant of 2,839 Restricted Stock Units, all at a stated price of $0.00 per unit or share.

How many Amtech Systems (ASYS) shares does Michael M. Ludwig hold after these transactions?

Following the reported transactions, Michael M. Ludwig directly holds 33,069 shares of Amtech Systems, Inc. common stock. This figure reflects his position after exercising or converting 8,081 Restricted Stock Units into an equal number of common shares on March 5, 2026.

What is the nature of the Restricted Stock Units reported by Amtech Systems (ASYS)?

Each Restricted Stock Unit reported represents a contingent right to receive one share of Amtech Systems, Inc. common stock. These RSUs are derivative securities that can settle into common shares under applicable terms, rather than being immediate, unrestricted stock positions.

Were any open-market purchases or sales reported in the Amtech Systems (ASYS) Form 4?

The reported Form 4 transactions involve a grant of Restricted Stock Units and the exercise or conversion of RSUs into common stock. The filing characterizes these as derivative exercises and awards at a stated price of $0.00, not as open-market purchases or sales.

On what dates did the Amtech Systems (ASYS) insider equity transactions occur?

The RSU grant of 2,839 units occurred on March 4, 2026. The exercise or conversion of 8,081 Restricted Stock Units into 8,081 shares of Amtech Systems, Inc. common stock took place on March 5, 2026, as disclosed in the Form 4.

What transaction codes were used in the Amtech Systems (ASYS) Form 4 for Michael M. Ludwig?

The Form 4 uses code “A” for the March 4, 2026 grant or award of 2,839 Restricted Stock Units and code “M” for the March 5, 2026 exercise or conversion of 8,081 Restricted Stock Units into common stock, both indicating acquisitions rather than sales.