UBMB

Christopher S. Gaffney serves as the sole manager of UBMB, LLC. He co-founded Great Hill Partners in 1998 and remains a Managing Partner there, leading investments in growth-stage companies across software, fintech, and digital commerce. Investment decisions at UBMB flow through Gaffney directly, without a separate investment committee or dedicated staff.

UBMB is the personal investment company of Christopher Gaffney, who is also co-founder and Managing Partner of Great Hill Partners. UBMB is not a fund or affiliate of Great Hill; it is owned by the Gaffney family trust and operates independently. The connection is the shared leadership — Gaffney runs both entities — which creates overlap in sourcing and networks but no formal co-investment arrangement between the two.

UBMB invests directly in seed-stage technology startups, often alongside venture capital co-investors such as Glasswing Ventures. The firm does not publicly disclose whether it also commits capital to third-party venture funds, but its documented activity points to direct equity stakes in early-stage companies rather than acting as a fund-of-funds.