UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number: 1-36313 TIMKENSTEEL CORPORATION (Exact name of registrant as specified in its charter) (State or other jurisdiction of incorporation or organization) 1835 Dueber Avenue SW, Canton, OH 44706 (Address of principal executive offices) (Zip Code) For the quarterly period ended March 31, ...

TimkenSteel Corporation (TMST) Q4 2020 Earnings Conference Call February 26, 2021 9:00 AM ET Company Participants Jennifer Beeman - Senior Manager, Communications & Investor Relations Michael Williams - President and Chief Executive Officer Kristopher Westbrooks - Executive Vice President and Chief Financial Officer Tom Moline - Executive Vice President, Commercial Operations Conference Call Participants Justin Bergner - G. Research Philip Gibbs - KeyBanc Capital Markets Operator Ladies and gentlemen, thank ...

UNITED STATES SECURITIES AND EXCHANGE COMMISSION FORM 10-K WASHINGTON, D.C. 20549 ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2020 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number: 1-36313 TIMKENSTEEL CORPORATION (Exact name of registrant as specified in its charter) Ohio 46-4024951 (State or other jurisdiction of incorporatio ...

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2020 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number: 1-36313 TIMKENSTEEL CORPORATION (Exact name of registrant as specified in its charter) (State or other jurisdiction of i ...

TimkenSteel Corporation (TMST) Q2 2020 Earnings Conference Call August 7, 2020 9:00 AM ET Company Participants Jennifer Beeman – Senior Manager of Communications and Investor Relations Terry Dunlap – President and Interim Chief Executive Officer Kris Westbrooks – Executive Vice President and Chief Financial Officer Tom Moline – Executive Vice President of Commercial Conference Call Participants Seth Rosenfeld – Exane BNP Tyler Kenyon – Cowen Phil Gibbs – KeyBanc Capital Markets Operator Ladies and gentleme ...

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2020 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number: 1-36313 TIMKENSTEEL CORPORATION (Exact name of registrant as specified in its charter) (State or other jurisdiction of incorp ...

TimkenSteel Corporation (TMST) Q1 2020 Earnings Conference Call May 8, 2020 9:00 AM ET Company Participants Jennifer Beeman – Senior Manager of Communications and Investor Relations Terry Dunlap – Interim Chief Executive Officer and President Kris Westbrooks – EVP and Chief Financial Officer Tom Moline – EVP-Commercial Conference Call Participants Seth Rosenfeld – Exane BNP Tyler Kenyon – Cowen Justin Bergner – G. Research Operator Ladies and gentlemen, thank you for standing by, and welcome to the TimkenSt ...

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2020 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number: 1-36313 TIMKENSTEEL CORPORATION (Exact name of registrant as specified in its charter) (State or other jurisdiction of incor ...

ý ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2019 OR UNITED STATES SECURITIES AND EXCHANGE COMMISSION o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 WASHINGTON, D.C. 20549 For the transition period from to FORM 10-K Commission file number: 1-36313 TIMKENSTEEL CORPORATION (Exact name of registrant as specified in its charter) Ohio 46-4024951 (State or other jurisdiction of incorporatio ...

TimkenSteel Corporation (TMST) Q4 2019 Results Earnings Conference Call February 21, 2020 9:00 AM ET Company Participants Jennifer Beeman - Senior Manager of Communications and Investor Relations Terry Dunlap - Interim Chief Executive Officer Kris Westbrook - Executive Vice President and Chief Financial Officer Tom Moline - Executive Vice President of Commercial Conference Call Participants Tyler Kenyon - Cowen Justin Bergner - G. Research Michael Leshock - KeyBanc Capital Markets Seth Rosenfeld - Exane BMP ...