Gillian Tan is a Bloomberg Gadfly columnist covering deals and private equity. She previously was a reporter for the Wall Street Journal. She is a qualified chartered accountant. Paul Singer's Elliott Management Corp. confirmed late Tuesday that it has amassed a stake in Taubman Centers Inc., joining Jonathan Litt's Land & Buildings Investment Management LLC as an activist pushing for change at the $3.4 billion company. That's after Dan Loeb's Third Point LLC and Jeff Smith's Starboard Value LP each recently revealed stakes in Taubman's larger rival, Macerich Co.