PRUDENTIAL INSURANCE YEAR EARNINGS The Prudential Insurance Company of America, a privately held company, said today that net income in 1986 rose to 2.8 billion dlrs from the 2.3 billion dlrs reported the year earlier. Assets under management rose to 177.5 billion dlrs in 1986 from 150.1 billion dlrs in 1985, while consolidated assets jumped to 134.5 billion dlrs from 115.7 billion dlrs. Discussing its major subsidiaries, the company said that Prudential Capital and Investment Services Inc, the holding company for brokerage house Prudential-Bache Securities and certain other related subsidiaries, earned 142 million dlrs in 1986. Of that, the securities operations of Prudential-Bache netted 81.7 mln dlrs after taxes and a charge of 25 mln dlrs.