Magnite rises on report of signing partnership with Musk's X

** Online advertising company Magnite's MGNI shares rise 10% to $21.08

** Elon Musk's X has signed a partnership with Magnite, Business Insider reported on Friday

** Magnite and X did not immediately respond to Reuters request for comment

** X is working with Magnite to boost programmatic ad sales, the report said

** Stock had risen 70.5% in 2024