Massimiliana Landini Aleotti (born 7 August 1942) is an Italian billionaire businesswoman. She is the co-owner and inheritor of the pharmaceutical company Menarini based in Florence, Tuscany, and one of the world's ten richest women.
As of March 2026, Forbes estimated her net worth at US$7.9 billion.
Her daughter Lucia is chairman of Menarini and son Alberto Giovanni is vice chairman.