Teradyne stock heads into the open after a 5.2% jump
Published on 09/21/2026 at 04:18 | Editorial responsibility: Rafael Müller, Editor-in-Chief AD HOC NEWS
Teradyne stock closed at USD 371.47 on the Nasdaq on September 18, 2026, gaining 5.19 percent from the prior session. Per Nasdaq-linked data summarized by MarketBeat, trading volume reached about 4,290,000 shares, nearly double the average volume of roughly 2,300,000 shares on the same day, underscoring heightened investor interest.
September 18, 2026 in numbers
Teradyne Inc. (ISIN US8807701029, Nasdaq: TER) registered a notably active session on September 18, 2026, as the shares finished at USD 371.47 on the Nasdaq, up 5.19 percent day on day. According to data referenced by MarketBeat, the session volume of about 4,290,000 shares was almost twice the typical turnover of around 2,300,000 shares, indicating strong demand for the stock during the last completed trading day.Ad-hoc-news highlighted that this close extended a robust year-to-date rally supported by demand for automated test and industrial automation solutions. The same recap cited a market capitalization of about USD 58,080,000,000 as of September 18, 2026, and noted that the daily percentage gain left the shares significantly above their level at the start of 2026.
As MarketBeat reported on September 20, 2026, Wall Street Zen upgraded Teradyne from hold to buy, citing strong quarterly results with revenue of USD 1,330,000,000, up 103.9 percent year over year, and earnings of USD 2.47 per share versus an analyst consensus of USD 2.09 per share. The same report noted that shares traded up about 5.2 percent to USD 371.47 around the time of the rating change, broadly in line with the 5.19 percent gain recorded at the Nasdaq close on September 18, 2026. In a broader AI and robotics context, MoneyLion recently highlighted that Teradyne shares had risen more than 100 percent year to date on the back of investor enthusiasm for AI-linked automation and semiconductor test equipment, illustrating how the latest session gains fit into a longer-running upward trend.
Outlook for today
Analyst commentary remains a focal point for Teradyne heading into today’s session. The buy rating from Wall Street Zen, as detailed by MarketBeat, underscores the firm’s confidence in Teradyne’s earnings trajectory and may continue to shape sentiment today, especially given the recent revenue and earnings outperformance versus consensus. In parallel, broader AI and robotics themes remain supportive; the performance overview published by MoneyLion places Teradyne among a group of technology names that have more than doubled this year, suggesting that sector flows into AI-related hardware and automation could remain an important backdrop. No company-specific events for September 21, 2026, such as a scheduled earnings release or shareholder meeting, are cited in the available recent coverage, so traders are likely to focus on how the stock trades in response to the latest analyst upgrade and the ongoing AI-driven demand narrative when the Nasdaq session opens today.
