Arm Holdings Plc's American depositary receipts (ADRs) have surged sharply in 2026, rising between 244% and 277% year-to-date, nearly doubling in a few weeks across the year [1, 2]. The company's market capitalization increased by roughly $180 billion to $218 billion, reaching a value between $180 billion and $218 billion in 2026 [1, 2].
The jump places Arm Holdings as the second-best performing stock in the Philadelphia Stock Exchange Semiconductor Index, outperforming all but two members of the S&P 500 Index [1, 2]. The stock jumped dramatically after the Bloomberg report on May 15, 2026, of the Federal Trade Commission opening an antitrust investigation into the firm. Since the initial plunge, Arm's ADRs surged 97%, contributing significantly to the increased valuation [2].
Arm's current valuation is notably high, trading at over 175 times projected 12-month earnings and 68 times projected revenues [2]. Some investors warn that while fundamentals remain strong, the stock carries valuation risk due to high future expectations. Dave Mazza, CEO of Roundhill Investments, said, "While the fundamentals are very strong, at least in our opinion, the valuation at this point is a key risk because you’re paying for 2030 today" [2]. Dennis Dick, head trader at Triple D Trading, called Arm "probably a no touch here" given the valuation concerns [2].
Arm aims to build its own chips and targets $15 billion in chip revenues by 2030, shifting focus to AI data center markets amid slower smartphone growth [1, 2]. The company issued its first ADRs in 2023 [1, 2].
The firm's ongoing expansion and rising stock price come despite regulatory scrutiny and valuation concerns. Investors will watch closely how the company executes on its chip development ambitions and handles the FTC investigation. No new deadlines or developments beyond the current market activity have been announced yet.
