# RidgeLake Partners

RidgeLake Partners is a RIA based in Grand Rapids, United States.

## Overview

- **Organization type:** RIA
- **Headquarters:** Grand Rapids, United States
- **Region:** North America
- **Address:** Grand Rapids, MI, United States
- **Founded:** 2020
- **Assets under management:** $20B (per the firm, June 2024)
- **Website:** ridgelake.com
- **LinkedIn:** https://www.linkedin.com/company/oa-private-capital

## Regulatory record

- **CRD number:** 282516
- **SEC file number:** 801-107115
- **Registration status:** Registered
- **Reports private funds:** Yes
- **IAPD record:** https://adviserinfo.sec.gov/firm/summary/282516

## About

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.

## Sectors

- Private Equity
- GP Stakes
- Middle Market

## Offices

- New York, NY
- Quebec, Canada

## People

- 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

## 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).

## Related profiles

- [Anson Funds](https://altss.com/profile/anson-funds)

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Last updated: 2026-07-06T01:24:22.248Z

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