X0508 4 2023-11-27 0 0001598428 TimkenSteel Corp TMST 0001638813 WESTBROOKS KRISTOPHER R 1835 DUEBER AVE. SW CANTON OH 44706 0 1 0 0 EVP, Chief Financial Officer 1 Common Shares 2023-11-27 4 M 0 11812 5.26 A 183275 D Common Shares 2023-11-27 4 S 0 11812 20.4833 D 171463 D Nonqualified Stock Option (Right to buy) 5.26 2023-11-27 4 M 0 11812 0.00 D 2030-03-02 Common Shares 11812 56188 D Price reported is the weighted average sale price for shares sold by the reporting owner on November 27, 2023. Shares were sold at a variety of prices ranging from $20.34 to $20.56. Vests in four equal annual installments beginning March 2, 2021. The reporting person adopted a written plan for the sale of the Company's common shares intended to satisfy the affirmative defense conditions of Exchange Act Rule 10b5-1(c) on August 29, 2023. All transactions reported herein were made pursuant to that plan. /s/ Kristine C. Syrvalin, as Attorney-in-Fact 2023-11-27