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

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.

[premarket]

PRE-MARKET GAINERS

TICKER
CHANGE
COMMENT

NBY [https://www.chartmill.com/stock/quote/NBY/profile]
73.35%
Investors witnessed a remarkable surge in NOVABAY PHARMACEUTICALS INC (NYSEARCA:NBY [https://www.chartmill.com/stock/quote/NBY/profile]) during Wednesday's pre-market session, with the stock price rising 73.35% to $1.04.

SISI [https://www.chartmill.com/stock/quote/SISI/profile]
49.09%
SHINECO INC (NASDAQ:SISI [https://www.chartmill.com/stock/quote/SISI/profile]) 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 [https://www.chartmill.com/stock/quote/STAI/profile]
30.09%
Exciting news for SCANTECH AI SYSTEMS INC (NASDAQ:STAI [https://www.chartmill.com/stock/quote/STAI/profile]) 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 [https://www.chartmill.com/news/STAI/gnwcq-2025-8-19-scantech-ai-strengthens-service-capabilities-by-selecting-curie-technologies]) was released yesterday.

AUUD [https://www.chartmill.com/stock/quote/AUUD/profile]
26.94%
During Wednesday's pre-market trading, AUDDIA INC (NASDAQ:AUUD [https://www.chartmill.com/stock/quote/AUUD/profile]) 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 [https://www.chartmill.com/stock/quote/RCKT/profile]
24.74%
ROCKET PHARMACEUTICALS INC (NASDAQ:RCKT [https://www.chartmill.com/stock/quote/RCKT/profile]) rose 24.74% to $3.63 during Wednesday's pre-market session. In the last 3 months the stock lost 53.59%.

BEEM [https://www.chartmill.com/stock/quote/BEEM/profile]
15.73%
During Wednesday's pre-market session, BEAM GLOBAL (NASDAQ:BEEM [https://www.chartmill.com/stock/quote/BEEM/profile]) exhibited strong growth, with the stock price climbing 15.73% to $2.87. In the last 3 months the stock gained 49.4%.

AHL [https://www.chartmill.com/stock/quote/AHL/profile]
14.39%
Pre-market trading on Wednesday showed positive momentum for ASPEN INSURANCE HOLDINGS-A (NYSE:AHL [https://www.chartmill.com/stock/quote/AHL/profile]), 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 [https://www.chartmill.com/stock/quote/GLE/profile]
14.27%
GLOBAL ENGINE GROUP HOLDIN-A (NASDAQ:GLE [https://www.chartmill.com/stock/quote/GLE/profile]) rose 14.27% to $0.81 during Wednesday's pre-market session. In the last month the stock lost 79.95%.

AMP.V [https://www.chartmill.com/stock/quote/AMP.V/profile]
11.15%
During Wednesday's pre-market session, (NYSE:AMP.V [https://www.chartmill.com/stock/quote/AMP.V/profile]) experienced a 11.15% increase, with the stock price reaching $1.75. The stock is trading 28.64% lower than a month ago.

MIMI [https://www.chartmill.com/stock/quote/MIMI/profile]
9.84%
MINT INCORPORATION LTD-A (NASDAQ:MIMI [https://www.chartmill.com/stock/quote/MIMI/profile]) 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 [https://www.chartmill.com/stock/market/pre-market-movers/usa-nyse-nasdaq-amex] page.

TODAY'S PRE-MARKET LOSERS

TICKER
CHANGE
COMMENT

NVNO [https://www.chartmill.com/stock/quote/NVNO/profile]
-72.32%
The stock price of ENVVENO MEDICAL CORP (NASDAQ:NVNO [https://www.chartmill.com/stock/quote/NVNO/profile]) 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) [https://www.chartmill.com/news/NVNO/accwirecq-2025-8-20-envveno-receives-not-approvable-letter-from-the-fda-for-the-venovalver]) was released earlier today.

BSLKW [https://www.chartmill.com/stock/quote/BSLKW/profile]
-31.7%
Despite yesterday's decline, GOLDEN ARROW MERGER A -CW26 (NASDAQ:BSLKW [https://www.chartmill.com/stock/quote/BSLKW/profile]) 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 [https://www.chartmill.com/stock/quote/ADD/profile]
-29.49%
The stock price of COLOR STAR TECHNOLOGY CO-A (NASDAQ:ADD [https://www.chartmill.com/stock/quote/ADD/profile]) 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 [https://www.chartmill.com/stock/quote/JHX/profile]
-27.19%
Investors observed a 27.19% decline in JAMES HARDIE IND PLC's (NYSE:JHX [https://www.chartmill.com/stock/quote/JHX/profile]) 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 [https://www.chartmill.com/news/JHX/bizwire-2025-8-19-james-hardie-reports-first-quarter-fy26-results-issues-fy26-guidance-reflecting-closing-of-azek-acquisition]) was released yesterday.

PRFX [https://www.chartmill.com/stock/quote/PRFX/profile]
-24.47%
PAINREFORM LTD'S (NASDAQ:PRFX [https://www.chartmill.com/stock/quote/PRFX/profile]) 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 [https://www.chartmill.com/stock/quote/LZB/profile]
-21.89%
LA-Z-BOY INC'S (NYSE:LZB [https://www.chartmill.com/stock/quote/LZB/profile]) shares fell 21.89% to $30.55.

CTSO [https://www.chartmill.com/stock/quote/CTSO/profile]
-21.3%
During Wednesday's pre-market session, the shares of CYTOSORBENTS CORP (NASDAQ:CTSO [https://www.chartmill.com/stock/quote/CTSO/profile]) declined by 21.3%, reaching $0.85. In the last 3 months the stock gained 27.81%.

SUGP [https://www.chartmill.com/stock/quote/SUGP/profile]
-20.72%
Despite yesterday's decline, SU GROUP HOLDINGS LTD (NASDAQ:SUGP [https://www.chartmill.com/stock/quote/SUGP/profile]) 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 [https://www.chartmill.com/stock/quote/GXAI/profile]
-16.99%
Despite yesterday's decline, GAXOS.AI INC (NASDAQ:GXAI [https://www.chartmill.com/stock/quote/GXAI/profile]) 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 [https://www.chartmill.com/stock/quote/TBH/profile]
-15.52%
During Wednesday's pre-market session, the shares of BRAG HOUSE HOLDINGS INC (NASDAQ:TBH [https://www.chartmill.com/stock/quote/TBH/profile]) 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 [https://www.chartmill.com/stock/market/pre-market-movers/usa-nyse-nasdaq-amex] page.