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

Last update: Aug 12, 2025

As the regular session of the US market concludes on Tuesday, let's get an insight into the after-hours session and identify the stocks leading the pack in terms of gains and losses.

Gainers

Ticker	Change	Comment
WBTN	38.14%	WEBTOON ENTERTAINMENT INC's (NASDAQ:WBTN) shares rose 38.14% to $12.93. WEBTOON ENTERTAINMENT INC released earnings Yesterday. Earlier today the company had a press release: WEBTOON Entertainment Inc. Reports Second Quarter 2025 Financial Results.
BSLK	26.61%	Notable gains for BOLT PROJECTS HOLDINGS INC (NASDAQ:BSLK) in the after-hours session, with a 26.61% rise to $2.76 during Tuesday. Earlier today the company had a press release: Bolt Projects Holdings Reports Q2 2025 Financial Results.
GBIO	25.19%	GENERATION BIO CO's (NASDAQ:GBIO) stock price is advancing with 25.19% to a price of $5.07. A press release (Generation Bio Announces New Data for Its Novel ctLNP Delivery System and Early T Cell Programs and Reports Second Quarter 2025 Financial Results) was released earlier today.
INTA	24.32%	Notable gains for INTAPP INC (NASDAQ:INTA) in the after-hours session, with a 24.32% rise to $45.9 during Tuesday. INTAPP INC released earnings Yesterday. A press release (Intapp announces fourth quarter and fiscal year 2025 financial results) was released earlier today.
CGTX	21.82%	COGNITION THERAPEUTICS INC's (NASDAQ:CGTX) shares rose 21.82% to $1.34 during Tuesday's after hours session. Building upon today's 28.1% gain, CGTX demonstrates resilience and ongoing growth in the after-hours session. yesterday the company released their earnings. A press release (Cognition Therapeutics Receives End-of-Phase 2 Meeting Minutes Confirming Alignment with U.S. FDA on Registrational Path for Zervimesine (CT1812) in Alzheimer’s Disease) was released earlier today.
ECG	18.01%	EVERUS CONSTRUCTION GROUP (NYSE:ECG) showcases remarkable after-hours performance, with a 18.01% rise to $89.45 during Tuesday's after-hours trading. EVERUS CONSTRUCTION GROUP released earnings Yesterday. A press release (Everus Reports Second Quarter Results, Raises Guidance for 2025) was released earlier today.
SMWB	9.72%	After the regular session, SIMILARWEB LTD (NYSE:SMWB) continues to impress in the after-hours session, with a 9.72% increase to $7.79. SIMILARWEB LTD released earnings Yesterday. Earlier today the company had a press release: Similarweb Announces Second Quarter 2025 Results.
NIVF	9.69%	NEWGENIVF GROUP LTD-A's (NASDAQ:NIVF) stock price is advancing with 9.69% to a price of $2.15. In the last month the share price dropped with 33.31%.
AZTA	9.55%	AZENTA INC (NASDAQ:AZTA) exhibits strong performance after hours, with shares rising 9.55% to $32.0 during Tuesday's after-hours session. In the last 6 months the share price dropped with 35.68%.
ATNFW	7.98%	KBL MERGER CORP IV - CW23's (NASDAQ:ATNFW) stock price increased by 7.98% to $0.12. The strong performance observed in the regular session, where ATNFW registered a 834.0% gain, continues to drive positive movement in the after-hours session.

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

Today's after hours losers

Ticker	Change	Comment
CAVA	-21.66%	Following a %ABSPERF% loss in the regular session, CAVA GROUP INC (NYSE:CAVA) exhibits further decline during today's after-hours session. yesterday the company released their earnings. A press release (CAVA Group Reports Second Quarter 2025 Results) was released earlier today.
LAZR	-19.27%	The after-hours session reflects LUMINAR TECHNOLOGIES INC (NASDAQ:LAZR)'s ongoing correction after experiencing a 11.9% loss in the regular trading hours. After a notable 11.9% increase earlier today, LAZR shows signs of a pullback during the after-hours session. The company's earnings where released Yesterday. Earlier today the company had a press release: Luminar Reports Q2’25 Financials.
DERM	-15.46%	After today's %ABSPERF% drop, JOURNEY MEDICAL CORP (NASDAQ:DERM) shows further decline during today's after-hours session with a 15.46% decrease. JOURNEY MEDICAL CORP released earnings Yesterday. Shareholders saw the stock price going 22.35% higher in the past month.
PETS	-15.34%	The after-hours session reflects PETMED EXPRESS INC (NASDAQ:PETS)'s ongoing correction after experiencing a %ABSPERF% loss in the regular trading hours. PETMED EXPRESS INC released earnings today. Shareholders saw the stock price going 26.35% lower is the past 6 months.
XAIR	-12.97%	BEYOND AIR INC's (NASDAQ:XAIR) shares fell 12.97% to $2.75. BEYOND AIR INC released earnings Yesterday. The stock is trading 59.38% lower than 6 months ago.
PRTS	-12.97%	CARPARTS.COM INC's (NASDAQ:PRTS) stock price is declining with 12.97% to a price of $0.8. CARPARTS.COM INC released earnings Yesterday.
SPRO	-10.98%	Following a %ABSPERF% loss in the regular session, SPERO THERAPEUTICS INC (NASDAQ:SPRO) exhibits further decline during today's after-hours session. yesterday the company released their earnings. Shareholders saw the stock price going 263.0% higher in the past 3 months.
SMTK	-10.73%	SMARTKEM INC's (NASDAQ:SMTK) shares fell 10.73% to $0.73 during Tuesday's after hours session. In the last 3 months the share price dropped with 24.07%.
DNN	-10.19%	Price volatility persists as DENISON MINES CORP (NYSEARCA:DNN) closed the regular session with a %ABSPERF% loss, and the downward trend continues in the after-hours session. The stock is trading 51.05% higher than 3 months ago.
HLP	-9.88%	Today's after-hours session sees a continuation of the %ABSPERF% decrease earlier in the day for HONGLI GROUP INC (NASDAQ:HLP). Shareholders saw the stock price going 54.3% lower in the past 3 months.

For the full after hours loser list go to our after hours losers page.