Expion360 is trading 8.48% higher at $5.17, up from its September 24 close of $4.77; the catalyst remains unclear. - No verified company-specific announcement, earnings release, filing, or late-breaking catalyst was identified for September 25, 2026. - The move may reflect limited-liquidity activity alongside a firmer broader market; the Nasdaq Composite was up 0.64% pre-market.