Twitter Inc named co-founder and interim Chief Executive Jack Dorsey as its permanent CEO, ending months of speculation about who would take the reins at the company.
Dorsey will remain head of fast-growing mobile payments company Square, which he also co-founded, potentially setting up conflicts of interest.
Twitter had previously said the CEO job would be a full-time position, which seemed to exclude Dorsey if he continued to run Square.
Some investors had expressed concerns about whether Dorsey could run both Twitter and Square, which is expected to go public later this year.
However, Twitter's shares rose 1.9 percent to US$26.80 in premarket trading.