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

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

TICKER
CHANGE
COMMENT

WBTN [https://www.chartmill.com/stock/quote/WBTN/profile]
38.14%
WEBTOON ENTERTAINMENT INC's (NASDAQ:WBTN [https://www.chartmill.com/stock/quote/WBTN/profile]) 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 [https://www.chartmill.com/news/WBTN/gnwcq-2025-8-12-webtoon-entertainment-inc-reports-second-quarter-2025-financial-results].

BSLK [https://www.chartmill.com/stock/quote/BSLK/profile]
26.61%
Notable gains for BOLT PROJECTS HOLDINGS INC (NASDAQ:BSLK [https://www.chartmill.com/stock/quote/BSLK/profile]) 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 [https://www.chartmill.com/news/BSLK/bizwire-2025-8-12-bolt-projects-holdings-reports-q2-2025-financial-results].

GBIO [https://www.chartmill.com/stock/quote/GBIO/profile]
25.19%
GENERATION BIO CO's (NASDAQ:GBIO [https://www.chartmill.com/stock/quote/GBIO/profile]) 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 [https://www.chartmill.com/news/GBIO/gnwcq-2025-8-12-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 [https://www.chartmill.com/stock/quote/INTA/profile]
24.32%
Notable gains for INTAPP INC (NASDAQ:INTA [https://www.chartmill.com/stock/quote/INTA/profile]) 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 [https://www.chartmill.com/news/INTA/bizwire-2025-8-12-intapp-announces-fourth-quarter-and-fiscal-year-2025-financial-results]) was released earlier today.

CGTX [https://www.chartmill.com/stock/quote/CGTX/profile]
21.82%
COGNITION THERAPEUTICS INC's (NASDAQ:CGTX [https://www.chartmill.com/stock/quote/CGTX/profile]) 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 [https://www.chartmill.com/news/CGTX/gnwcq-2025-8-12-cognition-therapeutics-receives-end-of-phase-2-meeting-minutes-confirming-alignment-with-us-fda-on-registrational-path-for-zervimesine-ct1812-in-alzheimers-disease]) was released earlier today.

ECG [https://www.chartmill.com/stock/quote/ECG/profile]
18.01%
EVERUS CONSTRUCTION GROUP (NYSE:ECG [https://www.chartmill.com/stock/quote/ECG/profile]) 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 [https://www.chartmill.com/news/ECG/bizwire-2025-8-12-everus-reports-second-quarter-results-raises-guidance-for-2025]) was released earlier today.

SMWB [https://www.chartmill.com/stock/quote/SMWB/profile]
9.72%
After the regular session, SIMILARWEB LTD (NYSE:SMWB [https://www.chartmill.com/stock/quote/SMWB/profile]) 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 [https://www.chartmill.com/news/SMWB/bizwire-2025-8-12-similarweb-announces-second-quarter-2025-results].

NIVF [https://www.chartmill.com/stock/quote/NIVF/profile]
9.69%
NEWGENIVF GROUP LTD-A's (NASDAQ:NIVF [https://www.chartmill.com/stock/quote/NIVF/profile]) 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 [https://www.chartmill.com/stock/quote/AZTA/profile]
9.55%
AZENTA INC (NASDAQ:AZTA [https://www.chartmill.com/stock/quote/AZTA/profile]) 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 [https://www.chartmill.com/stock/quote/ATNFW/profile]
7.98%
KBL MERGER CORP IV - CW23's (NASDAQ:ATNFW [https://www.chartmill.com/stock/quote/ATNFW/profile]) 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 [https://www.chartmill.com/stock/market/after-market-movers/usa-nyse-nasdaq-amex] page will show you the full list.

TODAY'S AFTER HOURS LOSERS

TICKER
CHANGE
COMMENT

CAVA [https://www.chartmill.com/stock/quote/CAVA/profile]
-21.66%
Following a %ABSPERF% loss in the regular session, CAVA GROUP INC (NYSE:CAVA [https://www.chartmill.com/stock/quote/CAVA/profile]) 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 [https://www.chartmill.com/news/CAVA/bizwire-2025-8-12-cava-group-reports-second-quarter-2025-results]) was released earlier today.

LAZR [https://www.chartmill.com/stock/quote/LAZR/profile]
-19.27%
The after-hours session reflects LUMINAR TECHNOLOGIES INC (NASDAQ:LAZR [https://www.chartmill.com/stock/quote/LAZR/profile])'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 [https://www.chartmill.com/news/LAZR/bizwire-2025-8-12-luminar-reports-q225-financials].

DERM [https://www.chartmill.com/stock/quote/DERM/profile]
-15.46%
After today's %ABSPERF% drop, JOURNEY MEDICAL CORP (NASDAQ:DERM [https://www.chartmill.com/stock/quote/DERM/profile]) 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 [https://www.chartmill.com/stock/quote/PETS/profile]
-15.34%
The after-hours session reflects PETMED EXPRESS INC (NASDAQ:PETS [https://www.chartmill.com/stock/quote/PETS/profile])'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 [https://www.chartmill.com/stock/quote/XAIR/profile]
-12.97%
BEYOND AIR INC'S (NASDAQ:XAIR [https://www.chartmill.com/stock/quote/XAIR/profile]) 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 [https://www.chartmill.com/stock/quote/PRTS/profile]
-12.97%
CARPARTS.COM INC'S (NASDAQ:PRTS [https://www.chartmill.com/stock/quote/PRTS/profile]) stock price is declining with 12.97% to a price of $0.8. CARPARTS.COM INC released earnings Yesterday.

SPRO [https://www.chartmill.com/stock/quote/SPRO/profile]
-10.98%
Following a %ABSPERF% loss in the regular session, SPERO THERAPEUTICS INC (NASDAQ:SPRO [https://www.chartmill.com/stock/quote/SPRO/profile]) 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 [https://www.chartmill.com/stock/quote/SMTK/profile]
-10.73%
SMARTKEM INC'S (NASDAQ:SMTK [https://www.chartmill.com/stock/quote/SMTK/profile]) 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 [https://www.chartmill.com/stock/quote/DNN/profile]
-10.19%
Price volatility persists as DENISON MINES CORP (NYSEARCA:DNN [https://www.chartmill.com/stock/quote/DNN/profile]) 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 [https://www.chartmill.com/stock/quote/HLP/profile]
-9.88%
Today's after-hours session sees a continuation of the %ABSPERF% decrease earlier in the day for HONGLI GROUP INC (NASDAQ:HLP [https://www.chartmill.com/stock/quote/HLP/profile]). 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 [https://www.chartmill.com/stock/market/after-market-movers/usa-nyse-nasdaq-amex] page.