BlackRock Portfolio Management LLC's Schedule 13G/A Filing for First Business Financial Services, Inc.

BlackRock Portfolio Management LLC has filed an amendment to its Schedule 13G for First Business Financial Services, Inc., reporting beneficial ownership of 4.9% of the company's common stock. The filing indicates that BlackRock Portfolio Management LLC holds 405,149 shares, with sole voting power over 363,254 shares and sole dispositive power over all 405,149 shares. The filing also states that no single person's interest in the common stock exceeds 5% of the total outstanding shares. The amendment was filed under Rule 13d-1(b) and includes certifications that the securities were acquired and are held in the ordinary course of business, not for the purpose of influencing control of the issuer.