The Walt Disney Company reported weak quarterly results Tuesday, the result of escalating streaming-service losses, underperforming 21st Century Fox assets and lower-than-expected theme park attendance.

In its first full quarter since closing a $71.3 billion deal to acquire most of Rupert Murdoch’s Fox entertainment businesses, Disney had a profit of $1.44 billion, a 51 percent decline from the comparable period a year earlier. Disney missed Wall Street’s revenue expectations by roughly $1 billion.

Disney shares fell more than 3 percent in after-hours trading, to around $137.

Robert A. Iger, Disney’s chief executive, said the difficult quarter was part of a “strategic transformation” underway at Disney, the world’s largest entertainment company. Disney is trying to become less dependent on cable channels like ESPN, which are in decline because of cord-cutting, and move into the rapidly growing realm of online video, a direct-to-consumer business defined by Netflix. Disney bought certain 21st Century Fox assets to enhance its streaming plan, which includes a subscription service called Disney Plus.

Disney Plus is to arrive in November and feature movies and shows from Disney, Pixar, the “Star Wars” franchise, National Geographic and Marvel. Disney also owns the majority of Hulu and the ESPN Plus sports streaming service. Disney said Tuesday that it would offer a $12.99 bundle package of the three services.