Portfolio update - Major Holdings

M&G High Income Investment Trust P.L.C Investment companies' disclosure M&G High Income Investment Trust P.L.C. announces today that as at 29 May 2009 the Company's top ten holdings were: Royal Dutch Shell 'B' 8.18% BP 7.97% UK Treasury 4.75% 2010 6.87% GlaxoSmithKline 5.89% Vodafone Group 5.42% HSBC Holdings 5.26% AstraZeneca 3.95% British American Tobacco 3.02% Unilever 3.02% Sage Group 1.75% ---END OF MESSAGE--- This announcement was originally distributed by Hugin. The issuer is solely responsible for the content of this announcement.