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.


postmarket

Gainers

TickerChangeComment
WBTN38.14%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.
BSLK26.61%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.
GBIO25.19%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.
INTA24.32%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.
CGTX21.82%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.
ECG18.01%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.
SMWB9.72%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.
NIVF9.69%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%.
AZTA9.55%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%.
ATNFW7.98%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

TickerChangeComment
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.

DENISON MINES CORP

NYSEARCA:DNN (2/6/2026, 8:04:00 PM)

After market: 3.7008 +0.01 (+0.29%)

3.69

+0.23 (+6.65%)


PETMED EXPRESS INC

NASDAQ:PETS (2/6/2026, 8:00:10 PM)

After market: 2.96 +0.08 (+2.78%)

2.88

-0.1 (-3.36%)


CARPARTS.COM INC

NASDAQ:PRTS (2/6/2026, 8:01:20 PM)

0.5034

+0.01 (+2.73%)


SPERO THERAPEUTICS INC

NASDAQ:SPRO (2/6/2026, 8:06:55 PM)

After market: 2.38 -0.04 (-1.65%)

2.42

+0.12 (+5.22%)


JOURNEY MEDICAL CORP

NASDAQ:DERM (2/6/2026, 8:28:34 PM)

After market: 8.35 0 (0%)

8.35

0 (0%)


BEYOND AIR INC

NASDAQ:XAIR (2/6/2026, 8:11:54 PM)

After market: 1.12 -0.03 (-2.61%)

1.15

+0.1 (+10.05%)


GENERATION BIO CO

NASDAQ:GBIO (2/6/2026, 8:00:00 PM)

After market: 5.4198 +0.08 (+1.49%)

5.34

-0.4 (-6.97%)


KBL MERGER CORP IV - CW23

NASDAQ:ATNFW (8/15/2025, 8:06:05 PM)

After market: 0.37 -0.06 (-13.95%)

0.43

-0.03 (-6.52%)


LUMINAR TECHNOLOGIES INC

NASDAQ:LAZR (12/23/2025, 8:16:50 PM)

After market: 0.1738 -0.01 (-7.75%)

0.1884

-0.03 (-13.46%)


SIMILARWEB LTD

NYSE:SMWB (2/6/2026, 8:06:35 PM)

After market: 4.88 +0.19 (+4.05%)

4.69

+0.3 (+6.83%)


INTAPP INC

NASDAQ:INTA (2/6/2026, 8:00:02 PM)

After market: 23.92 0 (0%)

23.92

+0.15 (+0.63%)


COGNITION THERAPEUTICS INC

NASDAQ:CGTX (2/6/2026, 8:23:34 PM)

After market: 1.07 +0.01 (+0.94%)

1.06

+0.06 (+6.03%)


AZENTA INC

NASDAQ:AZTA (2/6/2026, 8:18:51 PM)

After market: 28.72 0 (0%)

28.72

+0.87 (+3.12%)


HONGLI GROUP INC

NASDAQ:HLP (2/6/2026, 8:00:01 PM)

After market: 1.01 -0.02 (-1.94%)

1.03

+0.07 (+7.29%)


CAVA GROUP INC

NYSE:CAVA (2/6/2026, 8:21:20 PM)

After market: 69.9 -0.06 (-0.09%)

69.96

+5.41 (+8.38%)


NEWGENIVF GROUP LTD-A

NASDAQ:NIVF (2/6/2026, 9:54:33 PM)

After market: 0.9495 -0.05 (-5.05%)

1

0 (0%)


SMARTKEM INC

NASDAQ:SMTK (2/6/2026, 8:06:34 PM)

After market: 0.3627 -0.03 (-8.48%)

0.3963

-0.11 (-21.37%)


WEBTOON ENTERTAINMENT INC

NASDAQ:WBTN (2/6/2026, 8:11:19 PM)

After market: 11.18 +0.01 (+0.09%)

11.17

+0.69 (+6.58%)


BOLT PROJECTS HOLDINGS INC

NASDAQ:BSLK (1/2/2026, 8:02:28 PM)

After market: 0.4099 -0.17 (-29.72%)

0.5832

-0.22 (-27.01%)


EVERUS CONSTRUCTION GROUP

NYSE:ECG (2/6/2026, 8:04:00 PM)

After market: 97.29 0 (0%)

97.29

+8.33 (+9.36%)



Find more stocks in the Stock Screener

Follow ChartMill for more
Follow us on StockTwitsFollow us on InstagramFollow us on FacebookFollow us on YouTube