Hercules Technology Growth Capital, Inc. (NYSE: HTGC) ("Hercules") announced the closing of its public offering. The underwriter purchased 3,100,000 shares of common stock from Hercules in a bought deal for a price of $10.85 per share, above its last published net asset value of $9.54 per share, resulting in proceeds of $33,635,000 excluding other offering expenses. The last reported sales price of Hercules' common stock on September 27, 2012 prior to the sale of its shares of common stock was $11.42 per share. Hercules expects to use the net proceeds from this offering to fund investments in debt and equity securities in accordance with its investment objective and for other general corporate purposes. Credit Suisse is the sole underwriter of this offering. The securities described above were offered by Hercules pursuant to an effective shelf registration statement. The offering may be made only by means of a prospectus supplement and the accompanying prospectus, copies of which may be obtained from Credit Suisse Prospectus Department, One Madison Avenue, New York, NY 10010; telephone number: 1-800-221-1037; email: email@example.com. Investors are advised to carefully consider the investment objectives, risks, and charges and expenses of Hercules before investing. The prospectus, which has been filed with the Securities and Exchange Commission, contains this and other information about Hercules and should be read carefully before investing. 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 shares 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.