Arcline Investment Management Acquires Onboard Systems International

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 SYNEO

October 28, 2020

Medical Devices

Arcline Investment Management, a growth-oriented private equity firm, acquired a controlling stake in SYNEO from Rockwood Equity Partners. SYNEO is a vertically-integrated machine, tooling and services company serving the interventional medical device and specialty press-fit PCB markets, with manufacturing facilities in West Palm Beach, Florida and Angleton, Texas and forward-deployed sales/service offices in Europe and Asia.

Arcline Investment Management Acquires Electric Power Systems and North American Substation Services

April 21, 2021

Infrastructure

Arcline Investment Management acquired Electric Power Systems (EPS) and North American Substation Services (NASS) from Industrial Growth Partners to create a leading electric infrastructure services platform (now branded Voltyx). Industrial Growth Partners retained a minority stake in the combined business; the deal brings together protection and control engineering, high-voltage apparatus testing, and substation maintenance capabilities to serve utilities, renewable energy, data center and commercial customers.

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.

Arcline Investment Management Acquires Controlling Stake in Air Comm Corporation

July 6, 2021

Aerospace & Defense

Arcline Investment Management acquired a controlling stake in Air Comm Corporation in a transaction valuing the company at $250 million; Dave Harrison remains a significant minority shareholder and will serve as Chairman. Air Comm, based in Westminster, Colorado, designs, manufactures, and services environmental control and thermal management systems for aerospace OEMs, fleets and aftermarket service providers; Arcline plans to partner with management to expand MRO capabilities and pursue organic and inorganic growth.

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.