For nearly a century, the "Big Five" studios——have been the titans of theatrical releases. However, the landscape has shifted dramatically in the last decade.
Warner Bros. has mastered the "day-and-date" theatrical/streaming hybrid model (via Max), allowing popular productions to reach both cinema purists and home viewers simultaneously.
Blumhouse revolutionized horror by keeping budgets under $10 million. If a film flops, they lose little; if it hits ( The Purge , Get Out , M3GAN ), they make 1,000% returns.