Warren Buffett speaks all over the Berkshire Hathaway Annual Shareholders Assembly in Omaha, Nebraska on Might 4, 2024. CNBCWarren Buffett after all printed his secret inventory pick out in a brand new regulatory submitting, and it is insurer Chubb.His conglomerate Berkshire Hathaway has purchased just about 26 million stocks of Zurich-based Chubb for a stake value $6.7 billion. The valuables and casualty insurer become Berkshire’s 9th largest retaining on the finish of March.Stocks of Chubb jumped just about 7% in prolonged buying and selling following the scoop of Berkshire’s stake. The inventory has won about 12% yr thus far.Insurer Ace Restricted got the unique Chubb in 2016 for $29.5 billion in money and inventory, and the blended corporate followed the Chubb title. Evan Greenberg, CEO of Chubb, is the son of Maurice Greenberg, the previous chairman and CEO of insurance coverage massive American Global Crew.The Omaha-based Berkshire has a big footprint within the insurance coverage trade, from auto insurer crown jewel Geico to reinsurance massive Common Re and a slew of house and existence insurance coverage products and services. The conglomerate additionally got insurance coverage corporate Alleghany for $11.6 billion in 2022.Berkshire lately exited positions in Markel and Globe Existence in the similar trade.Thriller unveiledBerkshire has been retaining this acquire secret for 3 quarters immediately. Berkshire was once granted confidential remedy to stay the main points of a number of of its inventory holdings confidential.The subject of this thriller retaining did not arise on the Berkshire’s annual assembly in Omaha previous this month.Many had speculated that the name of the game acquire is usually a financial institution inventory because the conglomerate’s value foundation for “banks, insurance coverage, and finance” fairness holdings jumped by means of $1.4 billion within the first quarter after an greater of $3.59 billion in the second one part of final yr, consistent with separate Berkshire filings.It is quite uncommon for Berkshire to request one of these remedy. The final time it stored a purchase order confidential was once when it purchased Chevron and Verizon in 2020.