Wednesday's pre-market session: top gainers and losers

Last update: Aug 20, 2025

Before the US market kicks off on Wednesday, let's examine the pre-market session and unveil the notable performers among the top gainers and losers.

Pre-market gainers

Ticker	Change	Comment
NBY	73.35%	Investors witnessed a remarkable surge in NOVABAY PHARMACEUTICALS INC (NYSEARCA:NBY) during Wednesday's pre-market session, with the stock price rising 73.35% to $1.04.
SISI	49.09%	SHINECO INC (NASDAQ:SISI) experienced an impressive 49.09% increase in share price, reaching $7.38 during the pre-market session on Wednesday. In the last month the share price dropped with 40.86%.
STAI	30.09%	Exciting news for SCANTECH AI SYSTEMS INC (NASDAQ:STAI) as their shares soared 30.09% to $0.61 during the pre-market session on Wednesday. A press release (ScanTech AI Strengthens Service Capabilities by Selecting Curie Technologies) was released yesterday.
AUUD	26.94%	During Wednesday's pre-market trading, AUDDIA INC (NASDAQ:AUUD) demonstrated strong momentum, with the stock price rising 26.94% to $2.78. The stock is trading 48.35% lower than a month ago.
RCKT	24.74%	ROCKET PHARMACEUTICALS INC (NASDAQ:RCKT) rose 24.74% to $3.63 during Wednesday's pre-market session. In the last 3 months the stock lost 53.59%.
BEEM	15.73%	During Wednesday's pre-market session, BEAM GLOBAL (NASDAQ:BEEM) exhibited strong growth, with the stock price climbing 15.73% to $2.87. In the last 3 months the stock gained 49.4%.
AHL	14.39%	Pre-market trading on Wednesday showed positive momentum for ASPEN INSURANCE HOLDINGS-A (NYSE:AHL), as the stock price advanced 14.39% to reach $31.64. Shareholders saw the stock price going 20.95% lower in the past 3 months.
GLE	14.27%	GLOBAL ENGINE GROUP HOLDIN-A (NASDAQ:GLE) rose 14.27% to $0.81 during Wednesday's pre-market session. In the last month the stock lost 79.95%.
AMP.V	11.15%	During Wednesday's pre-market session, (NYSE:AMP.V) experienced a 11.15% increase, with the stock price reaching $1.75. The stock is trading 28.64% lower than a month ago.
MIMI	9.84%	MINT INCORPORATION LTD-A (NASDAQ:MIMI) recorded a 9.84% increase in share price during the pre-market session, reaching $8.15 on Wednesday. Shareholders saw the stock price going 43.8% higher in the past 3 months.

For the full premarket gainers list go to our premarket gainers page.

Today's pre-market losers

Ticker	Change	Comment
NVNO	-72.32%	The stock price of ENVVENO MEDICAL CORP (NASDAQ:NVNO) is declining by 72.32%, reaching $1.16 during Wednesday's pre-market session. The challenges persist for NVNO as it registered a -16.12% drop during the regular session yesterday, and this trend continued with another decline of 72.32% in today's pre-market session. A press release (enVVeno Receives Not-Approvable Letter from the FDA for the VenoValve(R)) was released earlier today.
BSLKW	-31.7%	Despite yesterday's decline, GOLDEN ARROW MERGER A -CW26 (NASDAQ:BSLKW) experienced a further 31.7% decrease in share price during Wednesday's pre-market session, reaching $0.04. In the last month the share price increased with 58.21%.
ADD	-29.49%	The stock price of COLOR STAR TECHNOLOGY CO-A (NASDAQ:ADD) is declining by 29.49%, reaching $0.09 during Wednesday's pre-market session. Prices are quite volatile now: this is a reversal from yesterday's 39.13% gain.
JHX	-27.19%	Investors observed a 27.19% decline in JAMES HARDIE IND PLC's (NYSE:JHX) stock price, which now stands at $20.7 during Wednesday's pre-market session. A press release (James Hardie Reports First Quarter FY26 Results; Issues FY26 Guidance Reflecting Closing of AZEK Acquisition) was released yesterday.
PRFX	-24.47%	PAINREFORM LTD's (NASDAQ:PRFX) stock price recorded a 24.47% decrease, falling to $1.79. After experiencing a 76.87% increase in yesterday's session, PRFX is showing a reversal in today's pre-market session with a 24.47% decrease.
LZB	-21.89%	LA-Z-BOY INC's (NYSE:LZB) shares fell 21.89% to $30.55.
CTSO	-21.3%	During Wednesday's pre-market session, the shares of CYTOSORBENTS CORP (NASDAQ:CTSO) declined by 21.3%, reaching $0.85. In the last 3 months the stock gained 27.81%.
SUGP	-20.72%	Despite yesterday's decline, SU GROUP HOLDINGS LTD (NASDAQ:SUGP) experienced a further 20.72% decrease in share price during Wednesday's pre-market session, reaching $0.46. Shareholders saw the stock price going 28.63% lower in the past month.
GXAI	-16.99%	Despite yesterday's decline, GAXOS.AI INC (NASDAQ:GXAI) experienced a further 16.99% decrease in share price during Wednesday's pre-market session, reaching $1.71. After yesterdays gain of 87.27%, it goes down with 16.99% in today's pre-market session.
TBH	-15.52%	During Wednesday's pre-market session, the shares of BRAG HOUSE HOLDINGS INC (NASDAQ:TBH) declined by 15.52%, reaching $1.0. Shareholders saw the stock price going 46.22% higher in the past month.

For the full premarket loser list go to our premarket losers page.