CSM Capital Corporation is a New York-based multi-family office and SEC-registered investment adviser serving families and foundations. The firm includes private equity, private credit and real estate in its broader portfolios, and its clearest confirmed property focus is self-storage. Through First Neck Self-Storage Group, a joint venture with Self-Storage Capital Partners, CSM pursued storage acquisitions across the top 100 U.S. metropolitan areas. The venture targeted stabilized facilities in primary and secondary markets, prioritizing secondary markets for higher yields. CSM reported $1.848 billion in firm-wide regulatory assets under management in its March 2026 SEC filing. First Neck raised $50 million for a program targeting up to $160 million in storage acquisitions; one purchase was a 111,023-square-foot CubeSmart-branded facility in Pembroke Pines, Florida, acquired for $13 million. For real estate sponsors, CSM stands out as a family-office capital partner that has joined forces with a specialist operator, bringing long-standing family relationships together with self-storage acquisition and management expertise.