Arcline Investment Management to Acquire Hydraulics International, Inc.

Arcline Investment Management Acquires Onboard Systems International

October 12, 2021

Aerospace & Defense

Arcline Investment Management, a growth-oriented private equity firm, has acquired Onboard Systems International from Liberty Hall Capital Partners. The acquisition expands Arcline's portfolio in mission-critical electromechanical systems for aerospace and defense, adding a designer, manufacturer, and servicer of external cargo equipment for military and civil helicopters headquartered in Vancouver, Washington.

Arcline Investment Management Acquires Altronic, LLC from HOERBIGER Group

December 9, 2025

Manufacturing

Arcline Investment Management, a growth-oriented private equity firm, has acquired Altronic, LLC from the HOERBIGER Group. Altronic, a Girard, Ohio-based maker of advanced ignition, control and instrumentation systems for critical infrastructure and OEMs, will be positioned to pursue growth with Arcline's capital and portfolio synergies.

Arcline Investment Management Acquires Hartzell Aviation

October 16, 2023

Aerospace & Defense

Arcline Investment Management, a growth-oriented private equity firm, has signed a definitive agreement to acquire Hartzell Aviation from Tailwind Technologies. Hartzell, headquartered in Piqua, Ohio, designs and manufactures aircraft propellers and engine accessories through its Hartzell Propeller and Hartzell Engine Tech business units; Arcline said the acquisition fits its strategy of investing in critical suppliers and will support the company's next phase of growth.

Applied Industrial Technologies Acquires Hydradyne, LLC

November 22, 2024

Industrial Services

Applied Industrial Technologies has signed a definitive agreement to acquire Hydradyne, a leading U.S. fluid power and motion control distributor. The acquisition expands Applied’s Engineered Solutions capabilities and Southeastern U.S. footprint; Hydradyne’s ~500 associates across 33 locations are expected to contribute about $260 million in sales and $30 million in EBITDA before synergies.

Arcline Investment Management Acquires International Water-Guard

June 13, 2023

Aerospace & Defense

Arcline Investment Management, a US-based private equity firm, has acquired International Water-Guard (IWG), a Surrey, British Columbia–based provider of flight-certified potable water systems and components for business, VIP and military aircraft. The acquisition expands Arcline’s portfolio of engineered aerospace systems and positions IWG to accelerate product development and aftermarket growth with Arcline’s support.

Arcline Investment Management Acquires American Holt Corporation

December 21, 2021

Manufacturing

Arcline Investment Management has acquired a controlling stake in American Holt Corporation from founder and CEO Jon Levy. Arcline will partner with the existing management team to support American Holt’s growth as a technology-enabled supplier of aftermarket replacement parts serving food & beverage, paper converting, and material handling markets.