https://www.reuters.com/article/us-uber-kalanick/ubers-kalanick-sells-21-of-his-stake-after-share-lockup-expires-idUSKBN1XL20Y >Uber Technologies Inc co-founder and former chief executive Travis Kalanick has sold nearly 21% of his stake in the ride-hailing company following the expiry of a so-called lockup period, a regulatory filing from late Friday showed.