el Sabba Sent: 6/11/2015 5:20:59 PM To: jeffrey E. [email protected]) CC: Richard Kahn ; Paul Morris Stewart Oldfield ; Vahe Stepanian Ariane Dwyer UMIIMI Subject: FW: (BN ) Costolo Steps Down as Twitters Chief Executive Officer (1) (C) Classification: Confidential Shares jumped in late trading, ris