Otonomy said Monday that it has filed for an IPO. The number of shares that will be sold as well as the stock’s pricing terms have yet to be set. J.P. Morgan Securities and BofA Merrill Lynch are serving as the lead underwriters. Based in San Diego, Calif., Otonomy is a biopharmaceutical company that develops treatments for ear disorders and diseases. Its backers include Perceptive Advisors, Federated Kaufmann Funds, OrbiMed Advisors, Novo Ventures, TPG Biotech, Avalon Ventures, Domain Associates, RiverVest Venture Partners, Aperture Venture Partners and Osage University Partners.