Audax Private Equity Acquires Monarch Landscape Companies from One Rock Capital Partners

Caterpillar Acquires Monarch Tractor

April 27, 2026

IT Services

Caterpillar has acquired Monarch Tractor, a California-based startup building self-driving electric tractors for specialty agriculture. The deal follows Monarch’s layoffs and a pivot from manufacturing to licensing its autonomous technology, while Caterpillar seeks deeper capabilities in electric and autonomous farming to complement its broader equipment and AI initiatives.

Audax Private Equity Acquires Majority Stake in Keystone

January 15, 2026

Consulting

Audax Private Equity has acquired a majority stake in Keystone, purchasing the global technology and advisory services practice from RLH Equity Partners in a recapitalization that closed January 2, 2026. Concurrently, Keystone spun out its Core AI business as an independent B2B AI SaaS company (Keystone.AI) with RLH retaining a minority stake; Jeff Marowits was named CEO and Greg Richards will remain as a senior strategic advisor.

Audax Private Equity Acquires Majority Stake in Lanter Delivery Systems

February 7, 2025

Logistics & Distribution

Audax Private Equity has acquired a majority stake in Lanter Delivery Systems from Equity Group Investments. Lanter, based outside St. Louis, operates a nationwide overnight, unattended delivery network serving automotive, agriculture, heavy-truck and industrial customers; Audax plans to invest in the network and technology to accelerate growth and expand end markets.

Monarch Landscape Companies Acquires Environmental Designs, Inc.

September 19, 2023

Environmental Services

Los Angeles-based Monarch Landscape Companies acquired Environmental Designs, Inc. (EDI), a Brighton, Colorado-based full-service commercial landscaping firm with additional locations in Loveland and Castle Rock. The deal is an add-on to Monarch's PE-backed platform (Audax Private Equity invested in Monarch in 2022) and expands Monarch's service density and capabilities across the greater Denver metropolitan area.

Lynx Equity Limited Acquires Majland Stauder

December 22, 2022

Agriculture

Toronto-based private equity firm Lynx Equity Limited has acquired Majland Stauder, a B2B plant nursery in Sønder Omme, Denmark. The sellers — Leif Rahbek, Erik Lauridsen and Torben Kristensen — will remain involved in operations, with Erik appointed CEO as Lynx looks to support the company's continued growth and longevity.

Audax Private Equity Acquires Majority Stake in GCX Mounting Solutions

September 20, 2021

Medical Devices

Audax Private Equity acquired a majority stake in GCX Mounting Solutions, a Petaluma, California–based designer and manufacturer of healthcare equipment mounting and mobility solutions; terms were not disclosed. Linden Structured Capital Fund provided junior capital alongside Audax to support the investment as GCX (330+ employees) pursues product, channel and M&A-driven growth.