Metallus Inc.

MTUS·NYSE·$19.64Share Price as of 11/2·$818MMarket Cap as of 11/2

Financials

10-QQ2 ended 06/30/2608/04/26 10-QQ1 ended 03/31/2605/05/26 10-KFY 202502/20/26 10-QQ3 ended 09/30/2511/06/25 10-QQ2 ended 06/30/2508/07/25

Disclosures

8-KCurrent report08/31/26 8-KCurrent report08/03/26 8-KCurrent report07/01/26 8-KCurrent report05/04/26 8-KCurrent report05/01/26

Prospectuses and Registrations

S-8Registration of securities for employees08/05/21 S-8 POSPost-effective amendment (S-8)02/24/21 S-8 POSPost-effective amendment (S-8)02/24/21 S-8 POSPost-effective amendment (S-8)02/24/21 S-8Registration of securities for employees01/05/21

Proxies

DEF 14ADefinitive proxy03/12/26 DEFA14AAdditional proxy materials03/12/26 DEF 14ADefinitive proxy03/13/25 DEFA14AAdditional proxy materials03/13/25 DEF 14ADefinitive proxy03/12/24

Ownership

144Proposed sale of securities10/05/26 Form 4Insider transaction10/05/26 Form 4Insider transaction10/05/26 144Proposed sale of securities10/02/26 Form 4Insider transaction10/02/26

Other

ARSAnnual report to shareholders03/12/26 ARSAnnual report to shareholders03/13/25 UPLOADLetter from the SEC01/17/25 CORRESPCorrespondence with the SEC01/14/25 UPLOADLetter from the SEC12/18/24