MACOM, FormFactor, Seagate among AI hardware stocks up 2.8%–3.8%

The afternoon rally among these five semiconductor and component suppliers follows a broader lift across AI hardware names, including AMD, Nvidia, Micron and Marvell. The common thread was demand: corporate performance numbers pointed to ongoing investment in technical infrastructure, and market sentiment shifted back toward the suppliers powering that computing ecosystem.

FormFactor stands out for its volatility. Its shares have had 80 moves greater than 5% over the last year, and the 3.8% gain was read as meaningful but not something that would fundamentally change the market's perception of the business. For the other four, the session's moves ranged from 2.8% at MACOM to 3.3% at both Semtech and Seagate, with Penguin Solutions at 3.1%.

A secondary catalyst came from Elon Musk's announcement that SpaceX and Tesla have formed special committees to discuss a merger between the two companies, adding to anticipation ahead of Tesla's earnings report later today. Taken together, the capital expenditure commitments and resulting revenues were seen as alleviating recent market concerns of an impending AI deceleration.