The story
History
Senior was originally established in 1933 by a group of former employees of Green's Economisers Ltd. as a rival concern. The company was listed on the London Stock Exchange as Senior Economisers Limited in 1947.
It acquired GAMFG Precision LLC, a manufacturer of machined components and assemblies for the off-road land vehicle and aerospace markets, for US$45.0 million in 2012.
It then bought Atlas Composites, a manufacturer of composite structures and tooling in 2013. It also bought Thermal Engineering, a supplier of high temperature lightweight aerospace components, for £22 million in 2013.
It bought UPECA Technologies, a Malaysian-based manufacturer of high-precision engineered components serving the aerospace and energy sectors, in 2014.
It acquired Lymington Precision Engineering, a manufacturer of precision-machined components, fabrications, assemblies and kit sets, for a minimum of £45.8 million in 2015. It also bought Steico Industries, a manufacturer of precision tube and duct assemblies for the commercial and defence aerospace industries, for £59 million in 2015.
In June 2021 the company rejected a $1.2 billion buyout offer from US private-equity firm Lone Star.
A private equity firm, Sullivan Street Partners, completed the acquisition of the company's former Aerostructures business in January 2026.
In March 2026, Senior received a takeover proposal from Tinicum Inc. and Blackstone Private Investments Advisors. The company also confirmed that it had received approaches from four other businesses including the private equity firm, Advent International. In April 2026, the takeover offer from Tinicum and Blackstone, worth $1.9 billion, was accepted. The acquisition was approved by the court on 6 October 2026, so allowing the transaction to proceed to completion.
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Financial information
Financial results have been as follows:
Note: Accounts to 2003 prepared according to United Kingdom Generally Accepted Accounting Principles. Accounts from 2004 onwards prepared according to International Financial Reporting Standards.
From Wikipedia’s article on Senior plc, shared under CC BY-SA 4.0.6