Mercury Fund Continues to Expand Investment Team Houston-based Mercury Fund announces the promotion of Heath Butler to Managing Director and the hiring of Samantha Lewis as Principal News provided by Share this article Share this article HOUSTON, Dec. 15, 2020 /PRNewswire/ -- Mercury Fund, an early-stage venture capital firm investing in Middle American entrepreneurs, today announced the promotion of Heath Butler to Managing Director, and the addition of Samantha Lewis as Principal. "Over the past few years, we've continued to build our investment team with top talent from our ecosystem," sa...