Rainier Partners

Rainier Partners is a Seattle-based private equity firm founded in 2020, specializing in investments in lower middle-market services businesses across various industries. With over $375 million in assets under management, the firm focuses on sectors where it possesses extensive expertise, including business services, consumer services, industrial services, and financial services. Rainier Partners aims to actively collaborate with business owners and management teams by providing growth capital, operational resources, and strategic support. The firm emphasizes alignment of interests by inviting founders and management teams of its portfolio companies to invest alongside them. Through its targeted approach, Rainier Partners seeks to foster growth and enhance the value of the businesses it partners with.

Jon Altman

Co-Founder and Managing Partner

Manu Amin

Associate

Henry Anderson

Vice President

Lucas Bench

Vice President

Caroline Forbess

Analyst

Jonathan Lo

Vice President

Shiven Mohindra

Analyst

Alex Rolfe

Managing Partner

Nick Vanoverberghe

Associate

11 past transactions

WPAS

Acquisition in 2024
WPAS is a third party administration firm specializing in multi-employer benefit plan administration.

The Omega Fitness

Acquisition in 2023
The Omega Fitness is a franchisee of Anytime Fitness clubs.

Primemas

Seed Round in 2023
Primemas is a semiconductor startup headquartered in New York, with an R&D center located in Seoul. The company specializes in the development of low-cost, high-performance Hub Chiplet System-on-Chip (SoC) modules, known as Hublets, which are designed for the growing chiplet industry. These Hublets utilize high-bandwidth, low-latency device-to-device (D2D) interfaces, facilitating efficient infrastructure sharing with custom partner dies. This versatility makes them suitable for various markets, including CXL, artificial intelligence, cryptocurrency, and data analytics. By leveraging Primemas Hublets, clients can significantly reduce both the cost and time required to design and manufacture custom SoCs, achieving efficiencies that can be as much as tenfold.

SCI Floor Covering

Acquisition in 2023
SCI Floor Covering, Inc. is a distributor and installer of commercial and residential floor covering products based in Romulus, Michigan, with an additional office in Southfield, Michigan. Founded in 1980, the company specializes in providing flooring solutions for various sectors, including multifamily, commercial, and residential markets. Its offerings encompass a wide range of products such as carpet, vinyl, rubber, ceramic tiles, luxury vinyl plank, hardwood, and specialty flooring, as well as polished and stained concrete and epoxy coatings. SCI Floor Covering serves a diverse clientele, including building owners, property managers, general contractors, and institutions like schools and medical facilities. The company focuses on both new installations and replacement projects, particularly in response to damage from disasters. By employing a team of sales representatives, SCI Floor Covering ensures that its clients receive comprehensive assistance for their flooring needs.

Mildang PT

Venture Round in 2022
Mildang PT is an ed-tech platform that provides lectures, management, evaluation, and content through online mode.

Pet Food Express

Private Equity Round in 2022
Pet Food Express operates retail stores that specialize in providing a wide range of pet food and supplies for various animals, including dogs, cats, and small pets. The company offers organic pet food, pet toys, and essential items for pet hygiene and training. In addition to retail products, Pet Food Express provides services such as dog training, pet washing, veterinary clinics, and wellness centers. The business also engages in community support initiatives, including adoption assistance and resources for rescue organizations and shelters. By catering to the diverse needs of pet owners, Pet Food Express serves as a comprehensive resource for pet care and supplies.

Wilmar

Acquisition in 2022
Wilmar operates as a distributor and supplier of professional tools, focusing on the automotive aftermarket, hardware, farm and fleet, and industrial markets. The company offers a wide range of products, including hand tools, air tools, specialty tools, sockets, wrenches, screwdrivers, grease guns, and various accessories. By providing these tools, Wilmar enables its customers to effectively develop, source, and manage a comprehensive catalog of products, catering to diverse industry needs.

Wilmar

Private Equity Round in 2022
Wilmar operates as a distributor and supplier of professional tools, focusing on the automotive aftermarket, hardware, farm and fleet, and industrial markets. The company offers a wide range of products, including hand tools, air tools, specialty tools, sockets, wrenches, screwdrivers, grease guns, and various accessories. By providing these tools, Wilmar enables its customers to effectively develop, source, and manage a comprehensive catalog of products, catering to diverse industry needs.

Calpine Containers

Acquisition in 2021
Calpine Containers is a distributor of high-quality packaging solutions tailored for the agriculture industry. The company offers a range of products including bags, boxes, pallets, and strapping, designed to protect produce from field to market. With 11 locations across key West Coast agricultural regions, Calpine serves over 500 fresh produce growers and marketers. In addition to packaging products, the company provides scheduling, inventory control, container assembly, and closing equipment services, ensuring efficient coordination of purchasing and deliveries at competitive prices for its clients.

AppOnboard

Series B in 2018
AppOnboard is a Los Angeles-based software company that provides tools for creators to develop mobile applications and interactive content without any programming knowledge. The company offers two primary products: Buildbox, the largest no-code mobile game engine, and AppOnboard Studio, a mobile design platform that allows users to create playable advertisements and app prototypes. By eliminating the need for coding, AppOnboard enables individuals and businesses to bring their ideas to life and share interactive experiences on application stores and social media platforms.

NDREAM

Venture Round in 2018
NDREAM is a mobile game and software development company focused on creating engaging online games that aim to bring enjoyment to a global audience. The company specializes in developing massive multi-player online games featuring 3D animated characters and strategy simulations, providing players with immersive gaming experiences enhanced by life-like visuals. Through its innovative approach, NDREAM seeks to captivate gamers and enhance their enjoyment in the digital gaming landscape.
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