New York-based single family office

KCK Group is a multi-billion dollar single-family office based in New York that manages the assets of the Kassar family. The firm is highly active in the life sciences sector, with a dedicated division focused on medical technologies, biotechnology, and pharmaceutical innovations. KCK invests across all stages of company development, from early-stage venture capital to growth equity and public market investments. Its life sciences portfolio includes prominent companies such as RefleXion Medical, Aerami Therapeutics, and Earlens Corporation. The firm is known for its long-term investment horizon and its ability to provide significant follow-on capital to its portfolio companies.