Old Second Bancorp, Inc. (NASDAQ: OSBC) concerning potential violations of the federal securities laws and/or breaches of fiduciary duties relating to its merger with West Suburban Bancorp, Inc. Under the terms of the merger agreement, West Suburban shareholders will receive 42.413 shares of Old Second common stock and $271.15 in cash for each share of West Suburban common stock. If you are an Old Second shareholder, . Halper Sadeh LLP may seek increased consideration, additional disclosures and information concerning the proposed transaction, or other relief and benefits on behalf of shareholders. Shareholders are encouraged to contact the firm free of charge to discuss their legal rights and options. Please call Daniel Sadeh or Zachary Halper at (212) 763-0060 or email [email protected] or [email protected].