X0306 4 2017-02-13 0 0001598428 TimkenSteel Corp TMST 0001205047 TIMKEN WARD J JR 1835 DUEBER AVENUE, S.W. CANTON OH 44706 1 1 0 0 President, CEO, Chairman Common Stock 2017-02-13 4 A 0 12450 0 A 137905 D Common Stock 2017-02-13 4 F 0 4224 17.155 D 133681 D Common Stock 150000 I By Self as Manager of LLC Common Stock 9359 I Savings Inv. Plan Common Stock 1405 I By Spouse Common Stock 8477 I By Child Common Stock 8127 I By Child Common Stock 26500 I By self as Co-Trustee and beneficiary Common Stock 3000 I By self as Co-Trustee By self as sole manager of the WJ Timken Jr Family, LLC. Members of the LLC include the reporting person, immediate family members and trusts for the benefit of immediate family members. DISCLAIMER: Undersigned disclaims all beneficial ownership By self as Co-Trustee and beneficiary of the Ward J. Timken Trust FBO Ward J. Timken, Jr. By self as Co-Trustee of the Ward J. Timken Trust FBO Grandchildren Represents vesting of 100% of the cliff vested restricted share units granted on February 13, 2014 and previously reported on Form 4. Ward J. Timken, Jr. 2017-02-15