Firm at a glance
Rainier Partners is a platform private equity firm founded in 2020 and headquartered in Seattle, WA, per its own website [S1][S2].
What they buy
Rainier Partners has assembled a portfolio spanning business services, financial services, consumer services, and industrial services, according to publicly disclosed holdings [S3]. The firm appears to pursue a buy-and-build strategy, acquiring platform companies and subsequently completing add-on acquisitions to expand geographic reach or service capabilities. Recent platform investments include a commercial cleaning business, a pension administration service provider, fitness centers, flooring contractors, and a pet food retailer [S3].
Portfolio
Business Services
Kleen-Tech (platform, acquired May 2025) [S3]
Financial Services
Welfare Pension & Administration Service (platform, acquired December 2024) [S3]
Consumer Services
Omega Fitness (platform, acquired October 2023) [S3]
Pet Food Express (platform, acquired May 2022) [S3]
Industrial Services
SCI Flooring (platform, acquired June 2023) [S3]
Wilmar Corporation (platform, acquired December 2021) [S3]
Recent activity (last 24 months)
– Moses DeBord appointed CEO of Kleen-Tech, January 6, 2026 [S4]
– Kleen-Tech Services acquisition, September 4, 2025 [S4]
– EZRED add-on acquisition, August 14, 2025 [S4]
– Flooring Partners add-on acquisition, August 5, 2025 [S4]
– Welfare & Pension Administration Service platform acquisition, December 19, 2024 [S4]
– MDS Fitness Wisconsin Gyms add-on acquisition, September 25, 2024 [S4]
– Carpetbaggers, Inc add-on acquisition, June 25, 2024 [S4]
How this firm fits a seller
Rainier Partners appears to target founder-owned or family-run businesses in fragmented service sectors, based on the pattern of platform acquisitions followed by geographic or capability tuck-ins [S3][S4]. The firm completed approximately two add-on acquisitions in the trailing twelve months as of early 2026, suggesting an active consolidation approach once a platform is established [S4]. Sellers in commercial services, fitness, flooring, or related industrial service niches may find sector alignment with existing portfolio companies. The firm’s relatively recent founding in 2020 indicates it is likely still in early fund cycles and actively deploying capital [S2].
Sources
[S1] https://www.rainierpartners.com/about/ (as of 2026-01-15)
[S2] https://www.rainierpartners.com/team (as of 2026-01-15)
[S3] https://www.rainierpartners.com/portfolio (as of 2026-01-15)
[S4] https://www.rainierpartners.com/news-case-studies/ (as of 2026-01-15)
Frequently asked questions
Does Rainier Partners buy business services businesses?
Yes, Rainier Partners has acquired business services companies, including Kleen-Tech, a commercial cleaning platform added to the portfolio in May 2025 [S3]. The firm’s portfolio also spans financial services, consumer services, and industrial services sectors [S3].
What companies has Rainier Partners acquired recently?
Recent platform acquisitions include Kleen-Tech in May 2025 and Welfare Pension & Administration Service in December 2024 [S3]. The firm has also completed several add-on transactions, including Flooring Partners in August 2025 and MDS Fitness Wisconsin Gyms in September 2024 [S4].
Where is Rainier Partners based and how big is the firm?
Rainier Partners is based in Seattle, WA, with its sole office location in that city [S1]. The firm was founded in 2020 [S2]. Fund size and assets under management have not been publicly disclosed as of January 2026.
Is Rainier Partners still actively acquiring?
Yes, Rainier Partners appears to be actively acquiring. The firm completed its most recent platform acquisition in September 2025 and announced a CEO appointment for that portfolio company in January 2026, indicating ongoing investment activity [S4].
This profile is maintained by CT Acquisitions as an independent third-party reference. CT Acquisitions is not affiliated with, endorsed by, or a representative of the firm profiled. All facts sourced from publicly available materials as of the dates cited.