KOPPERS HOLDINGS INC. 1,610,000 Shares Common Stock ($0.01 par value per Share) Underwriting AgreementKoppers Holdings Inc. • February 28th, 2007 • Lumber & wood products (no furniture) • New York
Each person or entity identified as a selling stockholder, in Schedule C annexed hereto (each, a “Selling Stockholder”) proposes to sell to Credit Suisse Securities (USA) LLC (the “Underwriter”), an aggregate of 1,610,000 shares (the “Firm Shares”) of common stock, $0.01 par value per share (the “Common Stock”), of Koppers Holdings Inc. a Pennsylvania corporation (the “Company”). The number of Firm Shares to be sold by each Selling Stockholder is the number of Firm Shares set forth opposite the name of such Selling Stockholder in Schedule C annexed hereto. In addition, solely for the purpose of covering over-allotments, the Selling Stockholders identified as “Saratoga Selling Stockholders” in Schedule C annexed hereto (the “Saratoga Selling Stockholders”) propose to grant to the Underwriter the option to purchase from the Saratoga Selling Stockholders up to an additional 241,500 shares of Common Stock (the “Additional Shares”). The Firm Shares and the Additional Shares are hereinafter
