We invest in and
help build great businesses


Rainier Partners is a Seattle-based private equity firm with $375 million in assets under management investing in lower middle-market services businesses. We look for opportunities where we can actively support business owners and management teams by providing growth capital, operational resources, and strategic partnership.

Learn more about our firm and the types of investments we make.

Our Partnership
Approach to
Building Value

Our investments come with a partnership mentality—we are straightforward, efficient, and relationship-oriented. We are an active partner. We roll up our sleeves to provide significant support, expertise, and financial resources to accelerate growth and build value.

Learn more about our approach to building value.

Our Portfolio

We focus on industries where we can be most helpful to our portfolio companies. These are industries in which we have extensive experience, a network of partners, and deep resources: business services, consumer services, industrial services, and financial services. When we invest, we often do so alongside the founders and management teams of our portfolio companies.

Learn more about our portfolio companies.


Our most important investment is the team we are actively building at Rainier. Our group is made up of driven, smart, hard-working, and humble individuals with experience across investing and operations. We’re a relationship-driven firm centered on a culture of entrepreneurship.

Learn more about our team.

Our Recent News & Investments

Rainier Partners Announces Closing of Inaugural Fund at $300 Million Hard Cap

Press Release

Rainier Partners, a private equity firm investing in lower middle-market services businesses, announced today that it has completed fundraising for Rainier Partners Fund I at its hard cap of $300 million, in excess of its $250 million target.

Ken Hartman Joins Rainier-Backed Wilmar, LLC as CEO, Bringing Extensive Tool and Equipment Industry Expertise to the Team

Press Release

Kent and Seattle, WA (January xx, 2023) — Wilmar, LLC and Rainier Partners are pleased to announce the appointment of Ken Hartman to Chief  Executive Officer.

Nationally Recognized Retail Executive Denyelle Bruno Joins Pet Food Express as CEO

Press Release

Pet Food Express and Rainier Partners are pleased to announce the appointment of retail executive Denyelle Bruno as Chief Executive Officer of Pet Food Express…

Reach Out To
Our Team

We’re always looking for great people and great businesses to become market leaders in their sectors.

Contact Us