India, Aug. 7 -- The following are some of the stocks making big moves in Thursday's pre-market trading (as of 08.15 A.M. ET).

In the Green

Montrose Environmental Group, Inc. (MEG) is up over 27% at $28.90.Outset Medical, Inc. (OM) is up over 26% at $16.70.Duolingo, Inc. (DUOL) is up over 24% at $428.63.Tutor Perini Corporation (TPC) is up over 23% at $58.40.Aris Water Solutions, Inc. (ARIS) is up over 22% at $24.43.Groupon, Inc. (GRPN) is up over 19% at $36.65.Celsius Holdings, Inc. (CELH) is up over 18% at $50.80.Niagen Bioscience, Inc. (NAGE) is up over 15% at $10.85.SkyWater Technology, Inc. (SKYT) is up over 15% at $10.25.Imunon, Inc. (IMNN) is up over 8% at $7.70.

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