Donaldson, Lufkin & Jenrette | 557 followers on LinkedIn. Donaldson, Lufkin & Jenrette (DLJ) was a U.S. investment bank founded by William H. Donaldson, Richard Jenrette and Dan Lufkin in 1959. Its businesses included securities underwriting; sales and trading; investment and merchant banking; financial advisory services; investment research; venture capital; correspondent brokerage services; online, interactive brokerage services; and asset management.