UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 8-K

CURRENT REPORT

PURSUANT TO SECTION 13 OR 15(d) OF THE

SECURITIES EXCHANGE ACT OF 1934

Date of report (Date of earliest event reported): July 7, 2015

Hercules Technology Growth Capital, Inc.

(Exact Name of Registrant as Specified in Charter)

(650) 289-3060

(Registrant’s telephone number, including area code)

Not applicable

(Former Name or Former Address, if Changed Since Last Report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

On July 7, 2015, Hercules Technology Growth Capital, Inc., a Maryland corporation (the “Company”), held its 2015 Annual Meeting of Stockholders (the “Annual Meeting”). As of April 15, 2015, the record date for the Annual Meeting, 72,705,329 shares of the Company’s common stock were outstanding and entitled to vote. The following matters were submitted at the Annual Meeting, including any adjournments thereof, to the stockholders for consideration:

1. To elect the following directors for the specified terms, or until her or his successor is elected and qualified: Allyn C. Woodward, Jr. for a term expiring in 2018; Thomas J. Fallon for a term expiring in 2018; Susanne D. Lyons for a term expiring in 2017; and Joseph F. Hoffman for a term expiring in 2016.

2. To approve an advisory proposal on named executive officer compensation.

3. To approve an amendment to the Company’s 2004 Equity Incentive Plan to increase the number of shares authorized for issuance under such plan.

4. To approve a proposal to authorize the Company to sell or otherwise issue up to 20% of its common stock at a net price below the then-current net asset value.

Allyn C. Woodward, Jr., Thomas J. Fallon, Susanne D. Lyons and Joseph F. Hoffman were each elected to serve as a director for the terms specified above, or until her or his successor is elected and qualified, and proposals 2, 3 and 4 were approved by the Company’s stockholders. The detailed final voting results of the shares voted with regard to each of these matters are as follows:

Continuing directors are as follows: Manuel A. Henriquez and Robert P. Badavas

Vote With Affiliate Shares

Vote Without Affiliate Shares

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.