Alphatec Holdings Inc. raised $57.7 million in an underwritten public offering of common shares, which will be used for general corporate purposes and to fund potential M&A activity.

The Carlsbad, Calif.-based company has closed the offering of 12,535,000 common shares at $4.60 apiece, including full exercise by the underwriters of their option to purchase 1,635,000 additional common shares.

Alphatec, which sells products for the surgical treatment of spinal disorders, plans to use the net proceeds for general corporate purposes and research and development. Funds also may be used for possible investments or acquisitions of complementary businesses, products or technologies, the company said in an Aug. 2 press release.

Piper Jaffray and Canaccord Genuity were joint book-running managers and Lake Street Capital Markets was co-manager in the offering that closed Aug 2.