Limbach Holdings, Inc. (Nasdaq: LMB) is a specialty mechanical and building systems contractor providing integrated heating, ventilation, air conditioning, plumbing, and electrical services to healthcare, education, and commercial facility owners across the United States. The company entered the public markets in 2016 through a business combination with 1347 Capital Corp., a blank-check vehicle sponsored by Kingsway Financial Services Inc. Since completing that transaction, Limbach has operated as an independent public company and has progressively shifted its business mix toward higher-margin owner-direct relationships in the building infrastructure and facility services sector. The company filed its most recent annual report on Form 10-K with the SEC on March 2, 2026. Sign up at SpacDesk for complete filing history, transaction data, and ongoing coverage of LMB and the broader SPAC universe.