No, SeaWorld as a company is not ending, but its shows featuring orcas are changing.
Specifically, SeaWorld parks in Orlando and San Antonio ended their traditional orca shows by 2019. These shows were replaced with more educational and conservation-focused presentations. While the shows featuring orcas have been phased out, SeaWorld parks continue to operate as theme parks with a focus on marine animals, conservation efforts, and other attractions.
In summary, while SeaWorld has made significant changes to its orca programs, the company itself is still operating.