Maya K. Bittar

Wellington Management Co. LLP (WMC) is a registered investment advisor and mutual fund manager headquartered in Boston, Massachusetts. The firm was founded in 1928 and is a subsidiary of Wellington Investment Advisors Holdings LLP, ultimately held by Wellington Management Group LLP. WMC offers investment management services for a fee to separate account clients and mutual funds sponsored by unaffiliated parties, as well as to investment vehicles that the firm sponsors.

Artisan Partners LP (Artisan Partners) is a mutual fund manager and SEC-registered investment advisor headquartered in Milwaukee, Wisconsin. The firm was founded in 2009 by Andrew Ziegler and is a wholly-owned subsidiary of Artisan Partners Holdings LP, itself a subsidiary of Artisan Partners Asset Management, Inc. (NYSE: APAM). Artisan Partners serves as investment adviser to a variety of separately managed accounts, unregistered pooled investment vehicles, trustees of collective investment trusts, and to each series of Artisan Partners Funds, Inc. (Artisan Partners Funds) and Artisan Partners Global Funds plc (Artisan Partners Global Funds), an open-ended management investment company.

Founded in 1988, McMahan Securities Co. LP is a broker-dealer located in Greenwich, Connecticut. They uncover companies early in their growth curve and create new and substantial investment opportunities for their clients. They focus their research solely on companies issuing convertibles. The companies they follow are often young, strong, growing firms. They tend to be those in need of capital that are properly positioned in their markets. Sometimes, they are companies that are not well known or recognized, making it difficult for them to successfully market an initial fixed-income offering. Instead, they issue convertibles, which are attractive to purchasers for their ability to be converted into equity, allowing participation in the company's rapid growth. Strategically, they look for securities with favorable risk/reward characteristics, those with a limited downside risk but a real opportunity to participate in the upside if the stock moves positively. Convertible securities can achieve both fixed income and equity type returns. They are a member of the NASD and the SIPC.

Madison Asset Management LLC (Madison) is an independent registered investment advisor headquartered in Madison, Wisconsin. The firm was founded by Frank Burgess in 1974 and is a subsidiary of Madison Investment Holdings, Inc. Madison provides individual and institutional clients a range of investment strategies across mutual funds, managed accounts and customized investment portfolios.