Amtech Systems Inc.

ASYS·NASDAQ·$22.82Share Price as of 11/2·$331MMarket Cap as of 11/2

Financials

10-QQ3 ended 06/30/2608/05/26 10-QQ2 ended 03/31/2605/07/26 10-QQ1 ended 12/31/2502/05/26 10-KFY 202512/10/25 10-QQ3 ended 06/30/2508/06/25

Disclosures

8-KCurrent report08/05/26 8-KCurrent report08/05/26 8-KCurrent report06/03/26 8-KCurrent report05/07/26 8-KCurrent report05/07/26

Prospectuses and Registrations

424B5Prospectus supplement06/03/26 424B5Prospectus supplement06/01/26 S-3MEFProspectus / registration06/01/26 S-3Shelf registration03/13/26 S-8Registration of securities for employees03/19/25

Proxies

DEF 14ADefinitive proxy01/23/26 DEFA14AAdditional proxy materials02/24/25 DEF 14ADefinitive proxy01/24/25 DEF 14ADefinitive proxy01/19/24 DEF 14ADefinitive proxy01/20/23

Ownership

SC 13GBeneficial ownership10/09/26 Form 4Insider transaction09/16/26 Form 4Insider transaction08/25/26 SC 13G/ABeneficial ownership (amended)08/06/26 Form 4Insider transaction08/05/26

Other

SDConflict Minerals disclosure05/26/26 EFFECTRequest for effectiveness03/23/26 CORRESPCorrespondence with the SEC03/18/26 UPLOADLetter from the SEC03/16/26 ARSAnnual report to shareholders01/23/26