Get insights into the top gainers and losers of Tuesday's after-hours session.

Last update: Aug 26, 2025

After the conclusion of the US market's regular session on Tuesday, let's examine the after-hours session and unveil the notable performers among the top gainers and losers.

Today's after hours gainers

Ticker	Change	Comment
NBY	47.78%	Promising after-hours performance observed for NOVABAY PHARMACEUTICALS INC (NYSEARCA:NBY) as its shares surged 47.78% to $1.33 during Tuesday's after-hours trading. The stock is trading 42.41% higher than a month ago.
MDB	23.4%	Positive market activity for MONGODB INC (NASDAQ:MDB) after regular trading hours, with a 23.4% increase to $264.5 in the after-hours session on Tuesday. yesterday the company released their earnings. In the last year the stock lost 26.29%.
BTAI	17.94%	Positive after-hours movement for BIOXCEL THERAPEUTICS INC (NASDAQ:BTAI) as its shares recorded a 17.94% increase, reaching $6.18 during Tuesday's after-hours session. The stock is trading 230.0% higher than a month ago.
SLRX	16.49%	SALARIUS PHARMACEUTICALS INC (NASDAQ:SLRX) rose 16.49% to $6.71 during Tuesday's after hours session. In the last month the stock lost 61.58%.
BRO	12.3%	Notable gains for BROWN & BROWN INC (NYSE:BRO) in the after-hours session, with a 12.3% rise to $107.86 during Tuesday.
SIGI	10.59%	In the after-hours session on Tuesday, SELECTIVE INSURANCE GROUP (NASDAQ:SIGI) experienced a notable 10.59% increase, driving its shares to $86.16.
EXLS	9.36%	EXLSERVICE HOLDINGS INC's (NASDAQ:EXLS) stock price is advancing with 9.36% to a price of $47.66.
OLED	8.59%	Impressive after-hours gains for UNIVERSAL DISPLAY CORP (NASDAQ:OLED) as its stock price advanced 8.59% to $155.88 during Tuesday's after-hours session. The stock is trading 25.9% lower than a year ago.
CNI	8.29%	After the regular session, CANADIAN NATL RAILWAY CO (NYSE:CNI) continues to impress in the after-hours session, with a 8.29% increase to $104.6.
SKYT	8.21%	After the regular session, SKYWATER TECHNOLOGY INC (NASDAQ:SKYT) continues to impress in the after-hours session, with a 8.21% increase to $13.05. In the last 3 months the share price increased with 33.41%.

For the full after hours gainers list go to our after hours gainers page.

Today's after hours losers

Ticker	Change	Comment
FEBO	-18.93%	FENBO HOLDINGS LTD's (NASDAQ:FEBO) stock price is declining with 18.93% to a price of $0.73. Following a 21.62% increase in the regular trading session, FEBO is showing signs of weakness with a 18.93% decline in after-hours trading.
ADNWW	-15.73%	Price volatility persists as AMCI ACQUISITION CORP-CW26 (NASDAQ:ADNWW) closed the regular session with a %ABSPERF% loss, and the downward trend continues in the after-hours session. The stock is trading 218.0% higher than a month ago.
STC	-15.18%	STEWART INFORMATION SERVICES's (NYSE:STC) stock price is declining with 15.18% to a price of $61.61. In the last 3 months the share price increased with 20.38%.
SBCF	-15.18%	After today's %ABSPERF% drop, SEACOAST BANKING CORP/FL (NASDAQ:SBCF) shows further decline during today's after-hours session with a 15.18% decrease.
BSY	-11.15%	The after-hours session reflects BENTLEY SYSTEMS INC-CLASS B (NASDAQ:BSY)'s ongoing correction after experiencing a %ABSPERF% loss in the regular trading hours. The stock is trading 22.53% higher than 6 months ago.
DEVS	-10.91%	Following a -11.29% loss in the regular session, DEVVSTREAM CORP (NASDAQ:DEVS) exhibits further decline during today's after-hours session. The regular session ended on a negative note with DEVS closing -11.29% lower, and the after-hours session reflects a continuation of the bearish sentiment.
WORX	-10.53%	SCWORX CORP's (NASDAQ:WORX) shares fell 10.53% to $0.34 during Tuesday's after hours session. Today's after-hours session indicates a reversal in WORX's earlier 30.67% gain, with prices exhibiting heightened volatility. A press release (SCWorx Expands Healthcare Data Management Network with New Collaboration) was released earlier today.
NCEW	-10.33%	NEW CENTURY LOGISTICS BVI LT's (NASDAQ:NCEW) shares fell 10.33% to $0.55 during Tuesday's after hours session. In the last month the share price dropped with 21.16%.
IVVD	-9.22%	Price volatility persists as INVIVYD INC (NASDAQ:IVVD) closed the regular session with a 84.03% loss, and the downward trend continues in the after-hours session. After registering a 84.03% gain earlier today, IVVD is experiencing a 9.22% decline in today's after-hours session.
AZN	-8.79%	ASTRAZENECA PLC-SPONS ADR's (NASDAQ:AZN) stock price is showing a decline of 8.79% to a price of $73.01 during the after-hours session.

Our after hours losers page will show you the full list.