Short answers, pulled from the story.
Warner Bros. Pictures was officially incorporated on the 4th of April 1923. The four brothers Harry, Albert, Sam, and Jack Warner had spent the previous decade producing silent films before making this decision in a small office in New Castle, Pennsylvania.
Warner Bros. released The Jazz Singer in 1927 as the first feature-length motion picture with synchronized dialogue. This film starred Al Jolson and shattered the silent era, forcing every other studio to adopt sound technology or go out of business.
Warner Bros. sold its pre-1950 film library to Associated Artists Productions in 1956 following the 1948 antitrust suit. The studio was forced to divest its assets to survive financially, losing rights to its early films and cartoons for nearly half a century.
Warner Bros. released the first Harry Potter film in November 2001 after acquiring the rights to the novels. The series went on to become the highest-grossing film series of all time without adjusting for inflation.
WarnerMedia and Discovery Inc. merged in 2022 to form Warner Bros. Discovery. This merger led to the studio being divided into three units: Warner Bros. Pictures/New Line Cinema, DC Films, and Warner Animation Group.
The Warner Bros. Archives were donated to the University of Southern California in 1977. This collection is the largest single studio collection in the world and houses records detailing Warner Bros. activities from My Four Years in Germany to its sale to Seven Arts in 1968.