Pre-market movers - April 28, 2026

Here is how US equities are shaping up pre-market on April 28, 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.

Vivakor Inc. (VIVK) leads pre-market gainers, climbing +8894.25% to $3.13. AREB at +1602.79% and ESHAR at +320.00% round out the early movers. The remaining 7 names in the top 10 are up an average of 97.52% heading into the open.

Compass Therapeutics Inc. (CMPX) leads pre-market losers, falling +64.41% to $1.79. AMPGR at -53.44% and TALKW at -51.61% round out the early movers. The remaining 7 names in the top 10 are down an average of 44.88% 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.