X0101 42003-06-18 0000874501 AMBAC FINANCIAL GROUP INC ABK 0001194141 DOYLE KEVIN J 0100Managing DirectorCommon Stock2003-06-184M01200022.19A17924DCommon Stock2003-06-184S0950069.75D8424DEmployee Stock Option (Right to Buy22.192003-06-184M0120000D2000-01-282004-01-28Common Stock120000DBased on a plan statement as of June 11, 2003, 6,347 shares were indirectly beneficially owned by the Reporting Person through Ambac's Savings Plan Trust.Exercisable as follows: 4,000 shares on 01/28/1998; an additional 4,000 shares on 1/28/1999; and an additional 4,000 shares on 01/28/2000.Anne G. Gill, Attorney-in-fact for Kevin J. Doyle2003-06-19