My vote: A – SiTime (SITM). SiTime deserves the closest watch because its precision-timing technology is becoming increasingly important for AI data centres, high-speed communications and advanced computing. Its Q3 2026 revenue increased 257% year-on-year to $298.7 million, while non-GAAP gross margin reached 70.7%. However, part of that growth came from its acquisition of Renesas’ timing business, and supply constraints remain a risk.
The metric that would change my mind is organic revenue growth and operating cash flow. I want to see whether demand is sustainable, margins remain strong and the business can convert growth into cash.
Adobe’s AI monetisation, Marvell’s acquisition benefits and Visa/Mastercard’s payment volumes are also worth monitoring, but SiTime’s exposure to AI infrastructure makes it particularly interesting.