** Chip testing equipment maker Teradyne's TER.O shares jump 23.7% to $308.69 in extended trading

** TER forecasts Q1 revenue between $1.15 billion and $1.25 billion, ahead of estimate of $934.5 million, according to data compiled by LSEG

** Expects adjusted EPS between $1.89 and $2.25 for Q1, also ahead of estimate of $1.26

** "In 2026, we expect year-over-year growth across all of our businesses, with strong momentum in compute driven by AI." - CEO Greg Smith

** Teradyne posts Q4 revenue of $1.08 billion, beating an estimate of $973.2 million

** TER rose over 50% in 2025

(Reporting by Juby Babu in Mexico City)

((Juby.Babu@thomsonreuters.com;))