BOSTON--(BUSINESS WIRE)--Audax Private Equity (“Audax”), has completed the sale of Senneca Holdings, Inc. (“Senneca” or the “Company”) to Kohlberg & Company, L.L.C (“Kohlberg”), a private equity firm based in Mt. Kisco, NY. Founded in 1932, Senneca designs and manufactures a broad portfolio of specialty doors and enclosure solutions serving a variety of end markets.