Brief: Madison Dearborn Partners, LLC Discloses 9.78% Stake In B.P. Marsh & Partners PLC
May 14 (Reuters) - B.P. Marsh & Partners PLC BPM.L: MADISON DEARBORN PARTNERS, LLC DISCLOSES 9.78% STAKE IN B.P. MARSH & PARTNERS PLC AS AT MAY 12 VERSUS PRIOR STAKE OF 19.91%- FILING ((Reuters.Briefs@thomsonreuters.com;;))