Check out the companies making headlines in after-hours trading. Applied Materials — The semiconductor equipment manufacturer tumbled 11% after the current-quarter outlook missed expectations of analysts polled by LSEG. Fiscal third-quarter earnings and revenue topped estimates. UnitedHealth — The insurer jumped nearly 8% after Warren Buffett’s Berkshire Hathaway revealed a new stake , according to a regulatory filing. Berkshire bought more than five million shares, amounting to a stake of more than $1.6 billion at the end of June. Sandisk — The data storage provider slumped almost 10% after posting a smaller non-GAAP gross margin than a year ago. The non-GAAP gross margin for the fourth quarter came in at 26.4% versus 36.4% a year ago. Gambling.com — The digital marketing servicer for online gambling companies dropped 11% after adjusted full-year EBITDA guidance missed analysts’ expectations. Gambling.com forecast earnings before interest, taxes, depreciation and amortization, or EBITDA, of $62 million to $64 million, lower than the $67.2 million consensus expectation among analysts, according to FactSet. Hims & Hers Health — The telehealth platform fell more than 5% after Bloomberg reported that the Federal Trade Commission is investigating the company’s business practices. According to people familiar with the matter, the FTC is considering whether Him & Hers makes it too hard for customers to cancel subscriptions. Red Cat — The maker of software for t …
