https://www.reuters.com/article/us-salesforce-com-ceo/salesforce-co-ceo-keith-block-steps-down-marc-benioff-to-be-sole-chief-idUSKBN20J2O5 >Salesforce.com Inc said on Tuesday Keith Block has stepped down as co-chief executive officer, making Marc Benioff the sole CEO of the business software company, sending its shares down nearly 3% in extended trading.