Getty, Shutterstock Deal Faces In-Depth UK Antitrust Probe (1)

Getty Images Holdings Inc.’s plan to acquire rival stock-photo provider Shutterstock Inc. will face an in-depth probe from the UK’s deal watchdog amid concerns the tie-up could hamper competition.

The Competition and Markets Authority said Monday that the deal to create a combined firm worth about $3.7 billion could lead to higher prices, worse commercial terms and lower quality of editorial and stock images for customers.

Getty Images’ shares fell 7.7% in New York after the UK regulator’s announcement while Shutterstock shares dropped 8.1% by 2:45 p.m. in London.

The CMA said remedies offered by the content-licensing firms weren’t ...