Levi & Korsinsky is investigating the Board of Directors of Optimer Pharmaceuticals, Inc. (“Optimer” or the “Company”) (NasdaqGS: OPTR) for possible breaches of fiduciary duty and other violations of state law in connection with the sale of the Company to Cubist Pharmaceuticals, Inc. Click here to learn more about the investigation http://zlk.9nl.com/optimer-pharmaceuticals-optr/, or call: 877-363-5972. Under the terms of the transaction, Optimer shareholders will receive $10.75 in cash for each share of Optimer stock they own. Optimer shareholders will also receive a Contingent Value Right entitling them to receive up to $5.00 for each share they own if certain net sales of the drug DIFICID are achieved. The investigation concerns whether the Optimer Board of Directors breached their fiduciary duties to stockholders by failing to adequately shop the Company before agreeing to enter into this transaction, and whether Cubist Pharmaceuticals, Inc. is underpaying for Optimer shares. In particular, at least one analyst set a price target of $25.00 per Optimer share. If you own common stock in Optimer and wish to obtain additional information or discuss your rights, please contact Joseph E. Levi, Esq. either via email at email@example.com or by telephone at (212) 363-7500, toll-free: (877) 363-5972, or visit http://zlk.9nl.com/optimer-pharmaceuticals-optr/. Levi & Korsinsky is a national firm with offices in New York, New Jersey and Washington D.C. The firm has extensive expertise in prosecuting securities litigation involving financial fraud, representing investors throughout the nation in securities and shareholder lawsuits. The attorneys at Levi & Korsinsky have been appointed by numerous courts throughout the country to serve as lead counsel on behalf of shareholders in major securities lawsuits and have successfully recovered multimillion-dollar damages awards on behalf of investors. For more information, please feel free to contact any of the attorneys listed below. Attorney advertising. Prior results do not guarantee similar outcomes.