William A. Sahlman

Protos LLC is founded in 1999 by Thomas H. Grant. It is headquartered in Massachusetts, US.

Stage 1 Ventures LLC (Stage 1 Ventures) is an venture capital firm founded in 2006 by David William Baum. The firm is headquartered in Waltham, Massachusetts.

Semma Therapeutics, Inc. develops transformative therapies for patients who currently depend on insulin injections. It focuses on combining proprietary cells with a state-of-the-art device to provide a true replacement for the missing beta cells in a diabetic patient without immunosuppression. The company was founded by Robert A. Millman, Walter A. Blättler, Felicia Pagliuca, Jeff Imbaro and Douglas A. Melton in 2015 and is headquartered in Cambridge, MA.

BionX Medical Technologies, Inc. designs and manufactures prosthetic devices. It offers BiOM Ankle, a lower-limb prosthesis with powered propulsion for enhanced mobility. Its proprietary BiOM T2 System uses robotics to replicate muscles and tendons, normalizing walking at all speeds and all terrains. The company was founded by Hugh Herr, Nicholas Negroponte and Richard M. Greenwald in 2007 and is headquartered in Bedford, MA.

Meakem Becker Venture Capital LLC (MBVC) is a venture capital firm founded in 2002 by David J. Becker and Glen T. Meakem. The firm is headquartered in Sewickley, Pennsylvania.

Wednesday Management LLC (Valhalla Partners) is a venture capital firm founded in 2002. The firm is headquartered in Vienna, Virginia.