EN Engineering Acquires Spectrum Engineering Corporation

Alliance Technical Group Acquires ESC Spectrum

July 7, 2025

Environmental Services

Alliance Technical Group, a Morgan Stanley Capital Partners–backed environmental services platform, has acquired ESC Spectrum, a provider of Continuous Emissions Monitoring Systems (CEMS) and Data Acquisition Systems (DAS). The deal adds ESC Spectrum's software, hardware, and field-service capabilities to Alliance's nationwide compliance, stack testing, and laboratory services, accelerating Alliance's CEMS/DAS offering and scale.

Allied Motion Acquires Spectrum Controls, Inc.

December 31, 2021

Manufacturing

Allied Motion Technologies Inc. acquired Spectrum Controls, Inc., a Bellevue, Washington–based designer and manufacturer of industrial I/O modules, displays and communications gateways, for a total purchase price of $70 million (approximately $45 million paid at closing, with $25 million deferred). Spectrum, founded in 1983 with about 72 employees, will expand Allied Motion’s industrial automation product portfolio and engineering capabilities and is expected to be accretive to earnings and gross margin.

AmpliTech Group Acquires Spectrum Semiconductor Materials

December 16, 2021

Logistics & Distribution

AmpliTech Group, Inc. (NASDAQ: AMPG) has executed a definitive agreement to acquire the assets and operations of Spectrum Semiconductor Materials, Inc., a San Jose–based authorized distributor of semiconductor components. The deal (approximately $8.0M cash plus $1.5M escrow and restricted shares) nearly triples AmpliTech's revenue base, adds a global distribution platform and a record combined order backlog of $11.4M, and is intended to accelerate commercialization of AmpliTech's MMIC chip solutions.

EN Engineering Adds Kestrel Power Engineering to Expand Electric Power Capabilities

March 4, 2020

Engineering Services

EN Engineering has partnered with and brought Kestrel Power Engineering into its organization to bolster EN's presence in the electric power and utility markets. Kestrel, a specialist in generator controls, compliance testing, tuning and modeling for power generation facilities across the U.S. and Canada, will integrate with EN to broaden its service offering and geographic reach.

Cornell Capital Acquires Spectrum Automotive Holdings Corp.

October 11, 2019

Insurance

Cornell Capital LLC has acquired Spectrum Automotive Holdings Corp. from Southfield Capital; terms were not disclosed. Spectrum, headquartered in Fairfield, New Jersey, is an agent, marketer and administrator of finance and insurance (F&I) products serving more than 1,400 dealers, OEMs and administrators across the U.S. Southfield Capital had owned Spectrum since 2015 and the management team will remain as significant shareholders alongside Cornell Capital.

Kohlberg & Company Acquires Majority Stake in EN Engineering from General Atlantic

July 18, 2019

Infrastructure

Kohlberg & Company has signed a definitive agreement to acquire a majority stake in EN Engineering from growth equity firm General Atlantic. EN Engineering, headquartered in Warrenville, Illinois, is a utility services and engineering firm with over 1,500 professionals serving gas, electric, pipeline and industrial customers; Kohlberg cited its infrastructure services experience to support the company's next phase of growth and geographic expansion.