5 Best Performing Quantum Computing Stocks So Far in 2026

4. Arm Holdings plc (NASDAQ:ARM)

Year-to-date return as of May 19: 94.50%

On May 16, Reuters, citing Bloomberg News, reported that Arm Holdings plc (NASDAQ:ARM) faces a US antitrust probe, with the Federal Trade Commission investigating its semiconductor licensing practices.

The Federal Trade Commission is examining whether Arm Holdings plc (NASDAQ:ARM) is attempting to “illegally monopolize” parts of the chip market. It is also investigating whether it could reject or downgrade licensing agreements for its CPU blueprints, Bloomberg reported, citing people familiar with the matter, adding the regulator has requested document preservation.

Reuters said that the company declined to comment on any investigation, while the Federal Trade Commission did not respond to requests.

The firm said in a statement that Qualcomm made a “baseless allegation of anticompetitive conduct” to gain leverage in an ongoing dispute, while Qualcomm did not comment, Reuters reported.

Reuters said that South Korea’s antitrust authority has also investigated Arm Holdings plc (NASDAQ:ARM)’s offices during scrutiny of licensing practices tied to complaints linked to Qualcomm.

Arm Holdings plc (NASDAQ:ARM) is involved in the licensing, marketing, research, and development of microprocessors, system IP, graphics processing units, physical IP, and associated systems IP, software, and tools. It operates in the United Kingdom, the United States, and other countries segments.