Thomson Reuters (TSX/NYSE: TRI) today announced that its Board of Directors has authorized the makin...: Thomson Reuters (TSX/NYSE: TRI) today announced that its Board of Directors has authorized the making of a substantial issuer bid/tender offer (SIB) pursuant to which the company will offer to purchase from shareholders for cancellation up to US$9 billion of its outstanding common shares. The SIB will commence today and expire on October 2, 2018, unless extended or withdrawn.