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RidgeLake Partners
OA Private Capital is an SEC-registered investment adviser in Grand Rapids, MI, registered since 2016. The firm manages $22.9 billion in assets, with $17.1...
RidgeLake Partners
OA Private Capital is an SEC-registered investment adviser in Grand Rapids, MI, registered since 2016. The firm manages $22.9 billion in assets, with $17.1 billion on a discretionary basis. It has 91 employees and 26 investment advisers.
General information
Firm type
RIA
Year founded
2020
AUM
$20B (per the firm, June 2024)
Location
Region
North America
Country
United States
City
Grand Rapids
Corporate office
Grand Rapids, MI, United States
Additional offices
New York, NY · Quebec, Canada
Principals
Todd Milligan
Co-Head
Michael Lunt
Co-Head
Doug Amacher
Managing Director and Head of Strategic Partnerships
Adam Gross
Investment Professional
Nick Assini
Vice President
Seung Hyun Ko
Investment Professional
John Lawrance
Investment Professional
Sarah Pagel
Investment Professional
Owen Bitner
Investment Professional
Sector focus
Frequently asked questions
Who runs investment decisions at RidgeLake Partners?
Todd Milligan and Michael Lunt serve as co-heads of RidgeLake. The investment team includes managing director Doug Amacher, who leads strategic partnerships, and vice president Nick Assini plus five other professionals (per the firm, 2025).
Does RidgeLake invest in fund commitments or only direct GP stakes?
RidgeLake focuses exclusively on minority GP-stakes investments — passive, minority positions in middle-market private capital firms. It does not make traditional fund commitments or co-investments alongside those managers (per the firm, investment approach).
What investment stages and asset classes does RidgeLake target?
The firm targets middle-market GPs across buyout, credit, secondaries, and specialty niches. Portfolio firms include control buyout shops (Sentinel Capital Partners), credit managers (Bayview Asset Management), and Canadian middle-market platforms (TorQuest Partners) (per the firm, portfolio page).
How does RidgeLake source deal flow differently from other GP-stakes investors?
RidgeLake leverages its dual parentage: OA's decades-long relationships with middle-market managers and Apogem's institutional network from its $42 billion platform. This provides access to GPs that value both patient family-office capital and the operational resources of a large insurer-backed firm (per the firm, our foundation).
Has RidgeLake exited any of its GP-stakes investments?
Yes. RidgeLake fully realized its inaugural 2020 investment in Newbury Partners through that firm's sale to Bridge Investment Group (NYSE: BRDG) in 2023 (per the firm, timeline).
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