Communications-services companies rose as risk-seeking investors sought exposure outside the tech sector.

Comcast pledged to invest more than $8.05 billion in the U.K. to build and run Universal's first European resort, as the U.S. media group moves to expand its theme-park business.

Separately, Universal Music Group shares fell after Bill Ackman's Pershing Square sold its stake valued at more than $1.5 billion, exiting the world's biggest music company following a failed buyout attempt.

Run-A-Muck, a media startup co-founded last year by traditional-media veterans from Hollywood and Manhattan, this month plans to start publishing short stories in Drafting, its ad-supported Substack about culture and fashion.

Write to Rob Curran at rob.curran@dowjones.com