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Premarket Gainers: Better Therapeutics, Voyager, Signing, NGM, Coinbase
BTTX:
Better Therapeutics surges 47% premarket after announcing Submission for FDA breakthrough device designation for digital therapeutic platform to treat liver disease.
VYGR:
Voyager Therapeutics shares leap 31% premarket on Novartis collaboration.
SGN:
Signing Day Sports jumps 29% premarket after commencing collaboration as the exclusive recruiting platform provider for elite development program.
NGM:
NGM Biopharmaceuticals climbs 20% premarket after confirming it received a non-binding expression of interest from the column Group.
COIN:
Coinbase Global jumps 2% premarket on heating crypto market

Premarket Losers: Aditxt, LumiraDx, YY, U.S. Gold, Li Auto
ADTX:
Aditxt shares drop 24% premarket after pricing of private placement.
LMDX:
LumiraDx drops 19% premarket as Roche agreed to purchase part of COVID-19 Test player diagnostics platform for $295M.
YY:
YY sinks 10% premarket as Baidu affiliated terminates acquisition of YY Live.
USAU:
U.S. Gold Corp sinks 4% premarket on cooled gold market.
LI:
Li Auto drops 4% premarket after its HK-listed shares sinked 5%.

$BTTX(BTTX)$VYGR(VYGR)$SGN(SGN)$NGM(NGM)$COIN(COIN)
$LI(LI)Knowing stock market today at a glance

Dec.23 2025

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