Cairngorm Capital Acquires Sentry Doors Holdings

ASSA ABLOY Acquires Sentinel Dock & Door in Canada

June 2, 2026

Industrial Services

ASSA ABLOY has acquired Sentinel Dock & Door, a Canadian commercial dock and door service company headquartered in Ontario. The acquisition is intended to strengthen ASSA ABLOY’s direct channel presence and expand its footprint across Canada within its Entrance Systems division.

Acorn Capital Completes Single-Asset Continuation Fund for Sentry Aerospares

June 11, 2025

Aerospace & Defense

Acorn Capital Management closed a single-asset continuation fund for Sentry Aerospares, co-led by Kline Hill Partners and LSV Advisors, providing liquidity to existing investors and extending Acorn's partnership with Sentry's management and founders. The new vehicle secures additional capital to support Sentry's global growth plans, including inventory expansion, technology upgrades, and potential acquisitions to strengthen its aftermarket supply chain and AOG capabilities.

Rubicon Partners Acquires O&S Doors Limited

October 1, 2023

Building Products

Rubicon Partners has acquired 100% of the share capital of O&S Doors Limited (OS Doors) from an affiliate of Sun European Partners. OS Doors, headquartered in Dungannon, Northern Ireland, is a UK & Ireland leader in kitchen, bedroom and bathroom frontal doors and employs around 350 people; Rubicon will work with existing management to further develop the business.

Sentry Doors (Cairngorm Capital portfolio) Acquires E. & S. W. Knowles

August 9, 2022

Building Products

Cairngorm Capital-backed Sentry Doors Holdings Limited has acquired E. & S. W. Knowles & Company Limited, a Birmingham-based specialist manufacturer of timber fire-rated and security internal doorsets. The deal is an add-on to Sentry's platform, expanding its product range and reinforcing its position in the UK timber fire safety and security doorset market.

Sentry Interactive Acquires Doordeck

June 1, 2022

Cloud & SaaS

Sentry Interactive, an Austin-based provider of digital detection and access management platforms, acquired Doordeck, a London-headquartered developer of cloud-based access control and mobile credentialing technology. The deal brings Doordeck's software-first mobile credential solution into Sentry's product portfolio to accelerate mobile access adoption, simplify installations amid supply-chain constraints, and support US market expansion.

Cairngorm Capital Acquires Fairalls (Builders' Merchants)

July 18, 2019

Building Products

Cairngorm Capital Partners has acquired Fairalls (Builders' Merchants) Limited, adding it to its existing building merchant businesses Parkers Building Supplies and Stamco to create the largest independent builders' merchant group in the South East of England. The enlarged group operates 24 branches with over 500 employees and combined revenues of approximately £120 million; Fairalls itself reported c.£15m revenue and about 85 employees and will continue to trade under the Fairalls brand with Richard Fairall remaining involved during the transition.