Supergirl earned about $38 million domestically and $30 million internationally in its opening weekend, totaling approximately $68 million globally since its June 26 release in 3,600 North American theaters [1, 2, 3, 4, 5]. The film opened second at the box office behind Toy Story 5, which made about $70 million domestically in its second weekend [1, 2, 3, 4].

The movie's production budget is estimated between $170 million and $186 million, combined with marketing expenses ranging from $120 million to $175 million [1, 2, 6, 3, 4, 5]. Despite the strong promotional push, Supergirl received mixed to negative reviews, holding a 56% critic score on Rotten Tomatoes, a 77% audience score, and a B-minus CinemaScore grade [1, 2, 4, 7]. Director Craig Gillespie's handling of the film was cited as a contributing factor to its lukewarm reception [7].

The film faces significant financial losses. Analysts project Warner Bros. could lose between $80 million and $120 million due to Supergirl's underperformance and high costs [6, 5]. The break-even point is reported to require approximately $300 million to $500 million globally because of revenue sharing and marketing spend [6, 5].

The film's lead actress, Milly Alcock, reported facing notable online abuse related to her casting, reflecting some audience backlash beyond ticket sales. "It definitely made me aware that simply existing as a woman in that space is something that people comment on," Alcock said [1, 8]. Some analysts have suggested female-led superhero movies face challenges attracting core audiences, which are largely male [1, 8].

Peter Safran, co-chairman and co-CEO of DC Studios, acknowledged the film did not meet box office expectations but said it remains part of a broader long-term strategy. "We remain confident in our approach," he said [1]. There is some optimism about upcoming DC movies like Clayface despite Supergirl's setback [1, 6].

Supergirl is expected to follow Warner Bros.' typical one-month theatrical window before releasing on premium video-on-demand around July 28 [9]. It will face heavy competition through July from films including Minions & Monsters, Evil Dead Burn, Moana live-action, Christopher Nolan's The Odyssey, and Spider-Man: Brand New Day [6].