ABS Ventures is a Waltham, Massachusetts, United States–based mid-stage venture capital firm founded in 1982 that makes primary and secondary direct equity investments in technology and growth companies—particularly in information technology, tech-enabled services and medical/healthcare sectors—by partnering with experienced management teams and providing capital, board involvement and strategic support to help companies scale and pursue exits; the firm has a hybrid investing approach that includes recapitalization and liquidity solutions alongside growth capital commitments.