AMTECH SYSTEMS INC — Director's Dealing 2015

May 13, 2015

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: AMTECH SYSTEMS INC (ASYS)
CIK: 0000720500
Period of Report: 2015-05-11

Reporting Person: M3C Holdings LLC (10% Owner)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2015-05-11	Common Stock	P	7500	$10.72	Acquired	246188	Direct
2015-05-12	Common Stock	P	17500	$10.8121	Acquired	263688	Direct

Footnotes

F1: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $10.70 to $10.76, inclusive. The reporting person undertakes to provide to Amtech Systems, Inc., any security holder of Amtech Systems, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the ranges set forth in footnote (1) to this Form 4.

F2: M3C Holdings LLC also reports beneficial ownership pursuant to Rule 13d of the Securities and Exchange Act of 1934, as amended, pursuant to a Schedule 13G filed jointly by Leslie J. Schreyer, as Trustee under Trust Agreement dated December 23, 1989 FBO the issue of Jonathan D. Sackler, M3C Holdings LLC and Robert Averick, with the Issuer on March 27, 2013, as amended by a Schedule 13G Amendment No. 1 filed with Issuer on January 3, 2014, a Schedule 13G Amendment No. 2 filed with the Issuer on February 17, 2015 and a Schedule 13G Amendment No. 3 filed with the Issuer on February 25, 2015.

F3: Represents shares held by M3C Holdings LLC. M3C Holdings LLC is a Delaware limited liability company wholly-owned by Mary Corson and Richard S. Sackler, M.D., as Trustees of the Mary Corson Trust dated January 15, 2004. Mary Corson is the sole beneficiary of the Mary Corson Trust and the wife of Jonathan D. Sackler.

F4: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $10.64 to $10.95, inclusive. The reporting person undertakes to provide to Amtech Systems, Inc., any security holder of Amtech Systems, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the ranges set forth in footnote (4) to this Form 4.