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Prime Quadrant US
Prime Quadrant US traces its founding to 1998 under Mo Lidsky. The firm began as a Canadian multi-family office serving affluent families with investment...
Prime Quadrant US
Prime Quadrant US traces its founding to 1998 under Mo Lidsky. The firm began as a Canadian multi-family office serving affluent families with investment strategy, governance, and legacy planning. It expanded into the United States through the October 2022 merger that created Prime Quadrant US, LLC. The firm deploys capital across private equity, venture capital, private credit, real estate, and hedge funds. It maintains five pooled Access LPs that aggregate client commitments into global managers. Direct activity occurs through Prime Quadrant Partners, which has completed co-investments in AVI-SPL with 26North Partners in December 2025, in Armada with 8090 Industries in November 2025, and in ArchKey Solutions with 26North Partners. A separate real estate co-investment with Dalfen Industrial and Starwood Capital Group targets industrial logistics assets in Dallas, Atlanta, Nashville, and Austin. Geographic exposure centers on North America with confirmed activity in Europe. Assets under management stand at $1.055B. The firm maintains a Toronto headquarters and a New York presence through the 2022 merger. It sponsors an annual conference and operates the Prime Quadrant Foundation, which directs grants toward pediatric care and mental health organizations including SickKids Foundation and CAMH. In February 2025 the internal team completed a buyout of the minority stake previously held by Focus Financial Partners, restoring 100 percent team ownership. The February 2025 recapitalization eliminated external ownership and reinforced the firm's independent structure. Prime Quadrant Partners operates as an internal direct-deal vehicle that sources co-investments alongside established GPs rather than through blind-pool funds alone. This architecture allows clients to access specific transactions while the Access LP series handles diversified manager exposure.
General information
Firm type
Multi Family Office
Year founded
1998
Location
Region
North America
Country
Canada
City
Toronto
Principals
Mo Lidsky
CEO and Partner
Chris G. Tsoromocos
Head of Prime Quadrant Partners
Sector focus
Frequently asked questions
Who runs investment decisions at Prime Quadrant US?
Mo Lidsky serves as CEO and Partner. Chris G. Tsoromocos heads the Prime Quadrant Partners direct investing platform. Decisions on manager selection for the Access LPs and co-investment approvals flow through this leadership structure.
How does Prime Quadrant US source proprietary deal flow?
The firm sources through its Prime Quadrant Partners platform by partnering with established GPs such as 26North Partners and 8090 Industries. It also maintains relationships via industry associations including CAASA and CAF Canada.
Does Prime Quadrant US participate in fund commitments or only direct deals?
Both. The firm runs five Access LPs that commit to global private equity, venture capital, private credit, real assets, and diversifying strategies managers. Prime Quadrant Partners separately executes direct co-investments and SPVs.
What investment stages does Prime Quadrant US typically target?
Confirmed stages include venture, growth, and buyout. The Access LPs target top-quartile managers across these stages while direct deals have included both early-stage infrastructure companies and established buyout targets.
Where does the underlying wealth come from?
The firm serves affluent families and individuals. No single wealth creator or industry origin is publicly disclosed.
Does Prime Quadrant US maintain philanthropic structures, and how are they separated?
Yes. The Prime Quadrant Foundation directs approximately $1M annually toward health initiatives with emphasis on pediatric care and mental health. Grants have supported SickKids Foundation, Holland Bloorview Kids Rehabilitation Hospital, and CAMH.
What is Prime Quadrant US's known posture on co-investments alongside external GPs?
The firm actively co-invests through Prime Quadrant Partners. Recent examples include two transactions with 26North Partners and one with 8090 Industries, each executed as direct minority positions alongside the lead sponsor.
Profile maintained by Altss using OSINT (open-source intelligence), regulatory filings, licensed data partners, and verified direct submissions. Read the methodology. Last updated: . Continuous refresh with full update cycles at least every 30 days.
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