Spider-Man . Jurassic Park . Despicable Me . Moviegoers heading to air-conditioned theaters during the Fourth of July holiday can rely on seeing one of those Sony, Universal or Illumination franchises on the marquee over the past 25 years. And count on Despicable spinoff Minions & Monsters to put up big numbers for 5-day grosses this year, given the Toy Story -levels of goodwill for that series. But when zeroing in on the question of single-day grosses (i.e. receipts from the July 4 day itself) there’s a leader that happens to be none of the above. It’s also a title that launched a big-screen franchise that keeps rumbling on in theaters since it arrived 19 years ago in July. Fittingly for the holiday, it’s also a Michael Bay movie. Paramount and Hasbro’s Transformers (2007), starring Shia LaBeouf and Megan Fox, still leads the way among top-grossing titles on the July 4 holiday with $29 million for the day, not adjusted for inflation.…