Complex sentence: Financier and founder of an insurance and savings and loan association, H.F. Ahmanson & Co., Howard F. Ahmanson, Sr. was also a philanthropist who made his fortune during the Great Depression selling fire insurance for property under foreclosure.
Split into simpler sentences: Financier and founder of an insurance and savings and loan association, H.F. Ahmanson & Co., also a philanthropist. Ahmanson made his fortune during the Great Depression selling fire insurance for property under foreclosure.