Stocks Moving in Premarket Today (April 18, 2026)

Pre-market trading occurs between 4:00 AM and 9:30 AM Eastern Time, before the regular US stock market session opens. During this window, stocks can move significantly in response to overnight news, earnings announcements, economic data releases, and global market developments. The movers listed below represent the most actively changing stocks across NYSE and NASDAQ.

The Z-Score column measures how unusual each stock's move is relative to its recent history — a Z-Score above 2.5 indicates a statistically significant deviation. The Insight column provides context on why each stock is moving, drawn from earnings reports, analyst actions, and news catalysts.

Use this page alongside the Market Heatmap for sector-level context, or dive into individual stock pages for comprehensive analysis including valuation scores and financial health metrics. Check the Earnings Calendar to see if today's movers are earnings-related.