Cooperfund is a family-owned, multi-family office investment company. The firm is based in Oak Brook, Illinois and was established in 1977. Cooperfund invests through a large number of partnerships, joint ventures and strategic alliances, with public profiles identifying the firm as participating in over 100 investment partnerships and JVs. Cooperfund operates as an in-house family investment organization rather than as a conventional external blind-pool manager; public records show incorporation and long-standing activity dating to 1977. No authoritative public record of fund AUM, target asset classes, typical check sizes, or named portfolio transactions was found in the consulted profiles. Cooperfund’s long tenure, family-office structure, and extensive use of partnership and JV structures make it a candidate capital partner for sponsors seeking direct JV or partnership capital from a privately held, long-established family investor.