Check out the companies making headlines before the bell. UniFirst – The stock tumbled more than 10% after Cintas terminated discussions to acquire the workwear provider in a deal that would have been worth $275 per share in cash. In a statement, Cintas CEO Todd Schneider said, “While we continue to believe in the merits of a transaction, we were unable to have substantive engagement with UniFirst regarding key transaction terms. We do not believe further discussions are warranted at this time.” KB Home – The homebuilder stock pulled back 8% after its first-quarter results missed Wall Street’s expectations. KB Home posted earnings of $1.49 per share on $1.39 billion in revenue, while analysts surveyed by LSEG had penciled in $1.58 per share and $1.5 billion in revenue. KB Home also cut its fiscal 2025 revenue outlook. Trump Media – Shares gained 9% after the Truth Social parent announced a deal with Crypto.com to launch a series of exchange-traded funds and other related products. Trump Media said that it plans to launch the funds later this year. Cloudflare – Shares popped 5.7% on the back of Bank of America’s double upgrade to buy from underperform . BofA said the network security stock has improving fundamentals and catalysts that can help growth accelerate. Pentair – The water treatment company’s stock climbed more than 1% after receiving an upgrade to outperform from neutral at Baird, which pointed to its slide in shares this year as well as long-term drivers as providing a buying opportunity for investors. Oklo – Shares fell nearly 7% after the advanced nuclear technology company posted a steeper annual loss compared to the prior-year period. In an SEC filing , the company also said, “We are an early‑stage company with a history of financial losses, and we expect to incur significant expenses and continuing financial losses.” Carvana – Shares of the online used car marketplace advanced about 6% after Morgan Stanley upgraded the stock to overweight from equal weight. The firm said its recent pullback affords investors a “unique” opportunity to “gain exposure to a leader in auto retail and fleet fulfillment.” American Electric Power – The stock slipped nearly 2% after the utility company said it is offering a $2 billion secondary sale of common stock through Citigroup and Barclays. — CNBC’s Alex Harring and Michelle Fox Theobald contributed reporting.