As of 8:00 PM ET on October 23, 2026, the biggest after-hours gainers are MACI (+28.4%), BOLT (+9.4%) and WGS (+9.1%), and the biggest after-hours decliners are AIOK (-18.3%), CPIX (-17.6%) and APXC (-15.2%). The most actively traded stocks after hours are SHFS, SPTI and BIL.
More on after-hours stock movers
After-hours stock movers in brief:
- Biggest after-hours gainers: MACI (Melar Acquisition Corp. I - Class A) +28.4% to $14.12; BOLT (Bolt Biotherapeutics) +9.4% to $6.86; WGS (Genedx Holdings Corp. - Class A) +9.1% to $61.25; TANH (Tantech Hldgs) +7.3% to $19.00; SBS (Companhia De Saneamento Basico Do Estado De Sao Paulo - Sabesp American Depositary Shares (Each Repstg 250 Common Shares)) +6.3% to $6.80
- Biggest after-hours decliners: AIOK (Ai Okto Corp.) -18.3% to $9.82; CPIX (Cumberland Pharmaceuticals) -17.6% to $7.00; APXC (Apex Critical Metals Corp.) -15.2% to $5.60; LYCA (Lycia Therapeutics) -11.7% to $26.50; VRDN (Viridian Therapeutics) -10.1% to $20.11
- Most active after hours: SHFS (SHF Hldgs) -9.0% to $0.12, 59.8 M shares; SPTI (State Street SPDR Portfolio Intermediate Term Treasury ETF) +1.9% to $28.15, 25.8 M shares; BIL (State Street SPDR Bloomberg 1-3 Month T-Bill ETF) 0.0% to $91.63, 15.3 M shares; GPUS (Hyperscale Data) -7.8% to $0.16, 14.6 M shares; SHV (iShares 0-1 Year Treasury Bond ETF) 0.0% to $110.32, 12.7 M shares
The full report below lists the most active stocks and the biggest gainers and decliners after the market closes, with the price, the change from the day's close, after-hours volume and market cap, and filters by sector and industry. Data as of 8:00 PM ET on October 23, 2026.
Find out which stocks are moving and actively trading prior after the regular trading session ends.
Stocks trading in the after-market hours might be responding to important company events, like quarterly earnings releases or shareholder updates. The news could be relevant to a single stock, an industry, a sector or perhaps the entire market.
To help the user quickly and easily gauge the state of after hours trading, the after hours report is split into three views:
- Stocks with positive price gaps from the day's closing price
- Stocks experiencing large price declines
- Most actively traded securities, regardless of price change
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