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

Co-Founder and 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 a research and development center located in Seoul. The company specializes in innovative Hub Chiplet System on Chip (SoC) modules aimed at the growing chiplet industry. Its Hub Chiplets, known as "Hublets," utilize high-bandwidth, low-latency direct-to-direct (D2D) interfaces, facilitating efficient infrastructure sharing with custom partner dies. This design enables Primemas Hublets to serve a diverse range of markets, including artificial intelligence, cryptocurrency, and data analytics. By leveraging these advanced technologies, Primemas significantly reduces the time and cost associated with designing and manufacturing custom SoCs, achieving efficiencies that can cut these processes by up to ten times.

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 is a retail operator specializing in a wide range of products and services for pets, including dogs, cats, small animals, and birds. The company offers various types of pet food, including organic options and those suitable for raw food diets. In addition to pet food, Pet Food Express provides essential supplies such as pet toys, hygiene products, and training materials. The company further enhances its offerings with services like dog training, pet washing, and wellness centers, along with veterinary clinics. Additionally, Pet Food Express is committed to community support through adoption assistance, rescue initiatives, and shelter partnerships, addressing various aspects of pet care and welfare.

Wilmar

Acquisition in 2022
Wilmar is a supplier and distributor of professional tools primarily serving the automotive aftermarket, hardware, farm and fleet, and industrial markets. The company specializes in a wide range of products, including hand tools, air tools, specialty tools, sockets, wrenches, screwdrivers, grease guns, and various accessories. By providing comprehensive support, Wilmar enables its customers to effectively develop, source, and manage a diverse catalog of tools and equipment tailored to their specific needs.

Wilmar

Private Equity Round in 2022
Wilmar is a supplier and distributor of professional tools primarily serving the automotive aftermarket, hardware, farm and fleet, and industrial markets. The company specializes in a wide range of products, including hand tools, air tools, specialty tools, sockets, wrenches, screwdrivers, grease guns, and various accessories. By providing comprehensive support, Wilmar enables its customers to effectively develop, source, and manage a diverse catalog of tools and equipment tailored to their specific 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 innovative online games that enhance user enjoyment. The company specializes in massive multiplayer online games, featuring 3D animated characters, strategy simulations, and realistic visuals. Through its commitment to immersive gaming experiences, NDREAM aims to engage a global audience and provide players with new forms of entertainment.
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