 ValueAct Holdings LP Trades, Portfolio, the activist firm founded by Jeff Ubben in 2000, disclosed in November that its top five trades during the third quarter included a position boost in Fiserv Inc. FISV , Financial, the closure of its position in TopBuild Corp. BLD , Financial and reductions to its stakes in Citigroup Inc. C , Financial, KKR Co. KKR , Financial and CBRE Group Inc. CBRE , Financial. 