PALO ALTO, Calif.--(BUSINESS WIRE)--Hercules Technology Growth Capital, Inc. (NYSE:HTGC) (“Hercules”) announced today that it is offering 6,600,000 shares of common stock pursuant to an effective shelf registration statement in an underwritten public offering. Hercules plans to grant the underwriters for the offering an option to purchase up to an additional 990,000 shares of common stock. Wells Fargo Securities, Raymond James and Keefe, Bruyette & Woods, a Stifel Company, are acting as joi