Hercules Technology Growth Capital, Inc. (NYSE: HTGC) ("Hercules") announced that in connection with the recent public offering of $75,000,000 in aggregate principal amount of its 7.00% senior unsecured notes due 2019 (the "September 2019 Notes"), which closed on September 24, 2012, the underwriters have exercised their over-allotment option for an additional $10,000,000 of the September 2019 Notes, bringing the total size of the offering to $85,000,000. The September 2019 Notes trade on the New York Stock Exchange under the trading symbol "HTGY". Hercules intends to invest the net proceeds of this public offering to fund investments in debt and equity securities in accordance with its investment objective and for other general corporate purposes. Stifel, Nicolaus & Company, Incorporated, Credit Suisse Securities (USA) LLC, Goldman, Sachs & Co. and RBC Capital Markets, LLC acted as joint book-running managers of this offering. BB&T Capital Markets, a division of Scott & Stringfellow, LLC, Janney Montgomery Scott LLC, JMP Securities LLC, Sterne, Agee & Leach, Inc., Stephens Inc. and Wunderlich Securities, Inc. acted as co-managers of this offering. This press release shall not constitute an offer to sell or the solicitation of an offer to buy, nor shall there be any sale of, the September 2019 Notes in any state or other jurisdiction in which such offer, solicitation or sale would be unlawful prior to the registration or qualification under the securities laws of any such state or other jurisdiction. About Hercules Technology Growth Capital, Inc.: Hercules Technology Growth Capital, Inc. (NYSE: HTGC) (“Hercules”), is a leading specialty finance firm providing loans to technology-related companies at all stages of development including technology, life science, and clean-tech industries. Since inception (December 2003), Hercules has committed more than $3.0 billion to over 210 companies and is the lender of choice for entrepreneurs and venture capital firms seeking growth capital financing. Hercules’ common stock trades on the New York Stock Exchange ("NYSE") under the ticker symbol "HTGC."