Quad-C Invests in Boulder Scientific Company

Quad-C Management Invests in Armstrong Transport Group

June 24, 2026

Logistics & Distribution

Quad-C Management, Inc. announced an investment in Armstrong Transport Group, a logistics platform providing truckload, LTL, and cross-border brokerage through an independent agent network across the United States, Canada, and Mexico. Terms were not disclosed, and Armstrong’s executive management team will remain in place with significant ownership to reinvest and accelerate growth, including via strategic acquisitions.

Quad-C Management Invests in O6 Environmental

August 12, 2025

Industrial Services

Quad-C Management announced an investment in O6 Environmental, a St. Louis-based provider of environmental remediation, industrial cleaning, liquid waste processing and emergency response services. Quad-C said it will partner with O6 management to expand the company’s geographic footprint, broaden service offerings and accelerate growth; terms were not disclosed.

Quad-C Management Invests in Flow Service Partners

November 21, 2024

HVAC & Mechanical

Quad-C Management has made an investment in Flow Service Partners, a multi-region provider of HVACR and plumbing services operating in the Midwest, Southeast and Mid-Atlantic. Quad-C said it will work with Flow's management to scale operations through M&A, expand geographic reach, and add new service offerings; terms were not disclosed.

Bluestone Investment Partners Makes Strategic Investment in Qualis Corporation

August 23, 2024

Aerospace & Defense

Bluestone Investment Partners has completed a strategic growth investment in Qualis Corporation through its SBICCT-licensed fund, BIP III SBIC LP. The capital will support Qualis — a Huntsville-based missile defense and space systems technology company — to accelerate technology development, organic growth and potential acquisitions while management remains in place.

Quad-C Management Acquires QED Technologies from Entegris

January 20, 2023

Manufacturing

Quad-C Management agreed to acquire QED Technologies International, Inc. from Entegris in a definitive agreement announced January 20, 2023. The deal is a carve-out of Entegris' QED business and will return QED to standalone ownership under Quad-C to support growth in precision optics, metrology, and contract optics manufacturing.

Quad-C Management Recapitalizes Apps Associates

July 14, 2021

IT Services

Quad-C Management completed a majority recapitalization of Apps Associates, an enterprise application services provider headquartered in Acton, Massachusetts. The transaction transfers ownership from BV Investment Partners to Quad-C, which plans to expand Apps Associates' service offerings and geographic footprint and appointed Larry Jones as chairman of the board.