0001315257 2026-05-08 2026-05-08 0001315257 1 2026-05-08 2026-05-08 shares iso4217:USD shares iso4217:USD pure 0001315257 S-8 EX-FILING FEES N/A S-8 Koppers Holdings Inc. false Equity Common Stock, par value $0.01 per share true 300000 40.62 12186000 0.0001381 1682.89 12186000 1682.89 1682.89 <div style="margin-bottom:8pt;padding-left:22.5pt;text-align:justify;text-indent:-22.5pt"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-weight:400;line-height:120%">(1)    This Registration Statement also covers additional securities to be offered or issued upon any adjustment or change made to the registered securities by reason of any stock split, stock dividend, recapitalization or similar transaction effected without the receipt of consideration which results in an increase in the number of the Registrant’s outstanding shares of common stock, par value $0.01 per share (“Common Stock”), as permitted by Rule 416(a) and Rule 416(b) under the Securities Act of 1933, as amended (the “Securities Act”).</span></div><div style="padding-left:22.5pt;text-align:justify;text-indent:-22.5pt"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-weight:400;line-height:120%">(2)     Estimated solely for the purpose of calculating the registration fee pursuant to Rule 457(c) and Rule 457(h) under the Securities Act. The fee is calculated on the basis of the average of the high and low trading prices for the Common Stock on The New York Stock Exchange on May 4, 2026, which was $40.62.</span></div> 40.62