Arteris is trading at $20.93, up 5.95%, in pre-market on October 21; the reason remains uncertain. - That compares with the October 20 close of $19.76. - No new company announcement or specific report explaining the move was found; investor relations lists the October 6 funding announcement as its latest release. - The broader market is mildly positive, but supplied index moves show no same-direction gain above 0.5% across the major indices; trading-activity details are unavailable.