William Blair acted as the exclusive financial advisor to Security 101 (S101 or the company) and Gemspring Capital in connection with the company’s sale to Morgan Stanley Capital Partners (MSCP). The transaction closed on February 19, 2026, and highlights William Blair’s position as a leading advisor in the security services sector.
About the Companies
Based in West Palm Beach, Florida, S101 provides mission-critical security integration services for organizations spanning a diverse customer base including healthcare, education, government, manufacturing, finance, data centers, and other end markets. The company specializes in end-to-end security solutions, including access control systems, video surveillance and intrusion detection systems, enabling customers to partner with a single provider for the full security lifecycle. Since its founding in 2007, S101 has grown into a leading security provider with a network of offices across the United States equipped to address localized security needs for clients and the communities in which they operate. For more information, visit security101.com.
Gemspring Capital, a Westport, Connecticut-based private equity firm with $5.1 billion of capital under management, provides flexible capital solutions to middle market companies. Gemspring Capital partners with talented management teams and takes a partnership approach to helping drive revenue growth, value creation, and sustainable competitive advantages. Target companies have up to $2.0 billion in revenue and are in the business services, consumer services, financial and insurance services, healthcare, industrial, software, and tech-enabled services sectors. For more information, visit gemspring.com.
MSCP, part of Morgan Stanley Investment Management, is a leading middle-market private equity platform that has invested capital for over three decades. The firm focuses on privately negotiated equity and equity-related investments primarily in North America and seeks to create value in portfolio companies primarily in a series of subsectors in the business services, consumer, healthcare, education and industrials markets with an emphasis on driving significant organic and acquisition growth through an operationally focused approach.For more information, visit morganstanley.com/im/capitalpartners.
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