Premarket movers showed sharp swings at 7:55 a.m. ET on October 23, 2026, with J-Star Holding up 62% at $3.11 while Davion Healthcare fell 40% to $7.35. Tantech Holdings also declined steeply, dropping 38% to $15.33. The prices were an early Friday snapshot, not opening or closing levels.
Key Takeaways
- J-Star recorded the largest percentage gain among the listed stocks.
- Davion Healthcare and Tantech posted the steepest declines in the snapshot.
- Extended-hours prices may differ from prices at the regular-session open.
Table of Contents
- Premarket movers include WISeSat.Space and RingCentral
- Declines extend beyond Davion and Tantech
- Why the opening prices may differ
- Conclusion
Premarket movers include WISeSat.Space and RingCentral
WISeSat.Space Holdings rose 26% to $6.65, behind J-Star among the listed gainers. RingCentral gained 15% to $91.06, while BIO-key International advanced 12% to $3.07.
The gains extended across several other companies, though their percentage increases were smaller. Crown Castle and Robert Half each rose 9%, while Immunic added 8%.
The snapshot provided prices and percentage changes but no company-specific catalysts or trading volumes. It therefore does not establish why the stocks moved or how much trading supported those moves.
| Item | Details |
|---|---|
| Crown Castle (CCI) | Up 9% at $86.01 |
| Robert Half (RHI) | Up 9% at $41.00 |
| Immunic (IMUX) | Up 8% at $7.80 |
| High Roller Technologies (ROLR) | Down 11% at $4.44 |
| GreenPower Motor (GP) | Down 10% at $1.43 |
| Aardvark Therapeutics (AARD) | Down 7% at $3.66 |
Declines extend beyond Davion and Tantech
Pomdoctor fell 15% to $1.72 and BranchOut Food declined 14% to $1.73. Both moves were substantially smaller in percentage terms than the losses in Davion Healthcare and Tantech.
Other decliners included BayCom, down 12% at $28.23, and Atlantic American, also down 12%, at $1.39. CNX Resources slipped 8% to $32.90.
These were individual stock moves rather than a measure of the broader market. The selected list alone does not establish the direction of major stock indexes.
Why the opening prices may differ
FINRA’s extended-hours trading risk disclosure explains that trading outside regular hours may involve lower liquidity, greater volatility and wider bid-ask spreads. It also cautions that extended-hours prices may not reflect prices when the regular session opens.
Those risks provide context for interpreting the large percentage changes, but they do not establish the cause of any particular stock’s move. The early gains and losses should not be treated as confirmed signals of regular-session momentum.
Conclusion
The next checkpoint is the regular-session open at 9:30 a.m. ET on October 23, when opening prices will show whether these premarket gains and losses persist.
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Disclaimer
This FinanceVelix article provides general information, not personalized financial, investment, legal, or tax advice. Market prices, interest rates and economic conditions can change; investments carry a risk of loss. Facts reflect the material available when published and may change. Check important information independently and consult a qualified professional when needed. Mentioning an asset, company, or service is not an endorsement.
