Pre-market movers - August 17, 2026

Here is how US equities are shaping up pre-market on August 17, 2026. The names below show the widest percentage moves against yesterday's close, giving a quick read on where retail and institutional attention is concentrating before the opening bell.

AACBR leads pre-market gainers, climbing +1233.33% to $0.01. MYSEW at +150.00% and WETO at +127.70% round out the early movers. The remaining 7 names in the top 10 are up an average of 64.89% heading into the open.

GDEVW leads pre-market losers, falling +82.22% to $0.00. AMPGZ at -69.33% and TMCWW at -68.68% round out the early movers. The remaining 7 names in the top 10 are down an average of 48.90% heading into the open.

Pre-market action does not always carry into the regular session - gaps often fade once liquidity returns - but outsized moves here frequently trace back to overnight filings, earnings, analyst actions, or macro headlines worth checking on each ticker's wire.