BlackRock, Inc. Increases Stake in Koppers Holdings Inc. to 15.3%

BlackRock, Inc. filed a Schedule 13G/A on April 24, 2026, disclosing a significant increase in its position in Koppers Holdings Inc. (KOP). As of the event date on March 31, 2026, BlackRock reported beneficial ownership of 2,952,521 shares of common stock, representing a 15.3% ownership stake in the company. This marks a substantial rise from the previously reported 0.0% ownership, indicating a major accumulation of shares. Of the total shares held, BlackRock possesses sole voting power over 2,923,873 shares and sole dispositive power over all 2,952,521 shares. The filing notes that the iShares Core S&P Small-Cap ETF specifically holds an interest exceeding five percent of the total outstanding common stock. The acquisition was made in the ordinary course of business and not for the purpose of changing or influencing the control of the issuer. BlackRock, Inc. is filing as a parent holding company on behalf of various subsidiaries listed in the filing exhibits.