Pre-market movers - August 21, 2026

Here is how US equities are shaping up pre-market on August 21, 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.

GDEVW leads pre-market gainers, climbing +100.00% to $0.00. BRLS at +91.89% and BTCT at +75.69% round out the early movers. The remaining 7 names in the top 10 are up an average of 47.16% heading into the open.

RNWWW leads pre-market losers, falling +70.59% to $0.00. TNONW at -51.36% and MRNX at -47.54% round out the early movers. The remaining 7 names in the top 10 are down an average of 41.52% 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.