Arrive AI is trading at $0.13, up 5.07% after hours on October 19; no new company-specific announcement explaining the rise was found. - The latest significant company news was an October 16 disclosure that its auditor had resigned after identifying financial-reporting control weaknesses. That news was associated with weakness in regular trading, not the after-hours gain. - U.S. markets finished higher, including the Nasdaq, which rose 1.02%. This may have offered a supportive backdrop, but it is not a confirmed cause.