Blennemann Family Investments is a Los Altos Hills, California–based single-family office that manages the Blennemann family’s private wealth and invests across private equity, real estate and debt. The office makes direct private investments and participates in venture and private equity opportunities, with principal Heinz Blennemann identified as a global investor active in technology/venture and private equity. Public materials associate the firm with multi-asset private investing rather than a headline fund vehicle, and its activity spans both real estate and private-capital markets. Leadership by a principal with cross-asset experience gives the office a centralized decision-making profile and a remit that includes direct equity, venture and real estate allocations under a family-wealth management structure. For sponsors, the firm’s distinguishing characteristic is its ownership-and-principal-led model: a single-family office led by Heinz Blennemann with documented investing activity across technology/venture, private equity, real estate and debt.