Monday's after hours session: top gainers and losers

Wondering what's happening in today's after-hours session? Stay tuned for the latest updates on stock movements.

[postmarket]

GAINERS

TICKER
CHANGE
COMMENT

WBTN [https://www.chartmill.com/stock/quote/WBTN/profile]
71.66%
After the regular session, WEBTOON ENTERTAINMENT INC (NASDAQ:WBTN [https://www.chartmill.com/stock/quote/WBTN/profile]) continues to impress in the after-hours session, with a 71.66% increase to $25.68. A press release (Disney and WEBTOON Entertainment Broaden Relationship to Create New Digital Comics Platform [https://www.chartmill.com/news/WBTN/bizwire-2025-9-15-disney-and-webtoon-entertainment-broaden-relationship-to-create-new-digital-comics-platform]) was released earlier today.

CHEK [https://www.chartmill.com/stock/quote/CHEK/profile]
28.3%
Positive after-hours movement for CHECK CAP LTD (NASDAQ:CHEK [https://www.chartmill.com/stock/quote/CHEK/profile]) as its shares recorded a 28.3% increase, reaching $2.72 during Monday's after-hours session. Also in the regular session CHEK had a very good day: shares closed with a 184.0% gain.

BSLKW [https://www.chartmill.com/stock/quote/BSLKW/profile]
26.61%
GOLDEN ARROW MERGER A -CW26 (NASDAQ:BSLKW [https://www.chartmill.com/stock/quote/BSLKW/profile]) showcases remarkable after-hours performance, with a 26.61% rise to $0.05 during Monday's after-hours trading. In the last month the share price dropped with 38.0%.

ORN [https://www.chartmill.com/stock/quote/ORN/profile]
26.26%
Positive market activity for ORION GROUP HOLDINGS INC (NYSE:ORN [https://www.chartmill.com/stock/quote/ORN/profile]) after regular trading hours, with a 26.26% increase to $9.52 in the after-hours session on Monday. A press release (Orion Group Holdings Announces Over $120 Million in Contract Wins [https://www.chartmill.com/news/ORN/gnwcq-2025-9-15-orion-group-holdings-announces-over-120-million-in-contract-wins]) was released earlier today.

BSLK [https://www.chartmill.com/stock/quote/BSLK/profile]
26.01%
BOLT PROJECTS HOLDINGS INC (NASDAQ:BSLK [https://www.chartmill.com/stock/quote/BSLK/profile]) exhibits strong performance after hours, with shares rising 26.01% to $4.7 during Monday's after-hours session. In the last month the stock lost 57.57%.

RVLV [https://www.chartmill.com/stock/quote/RVLV/profile]
25.94%
REVOLVE GROUP INC's (NYSE:RVLV [https://www.chartmill.com/stock/quote/RVLV/profile]) stock price increased by 25.94% to $30.0.

ZONE [https://www.chartmill.com/stock/quote/ZONE/profile]
19.41%
CLEANCORE SOLUTIONS INC-CL B's (NYSEARCA:ZONE [https://www.chartmill.com/stock/quote/ZONE/profile]) stock price increased by 19.41% to $3.2. After experiencing a -29.47% decline earlier today, ZONE shows signs of a rebound in today's after-hours session.

HITI [https://www.chartmill.com/stock/quote/HITI/profile]
10.87%
Impressive after-hours gains for HIGH TIDE INC (NASDAQ:HITI [https://www.chartmill.com/stock/quote/HITI/profile]) as its stock price advanced 10.87% to $4.08 during Monday's after-hours session. HIGH TIDE INC released earnings Yesterday. The stock is trading 38.35% higher than a month ago.

NUKK [https://www.chartmill.com/stock/quote/NUKK/profile]
9.9%
NUKKLEUS INC's (NASDAQ:NUKK [https://www.chartmill.com/stock/quote/NUKK/profile]) stock price increased by 9.9% to $5.66. After a notable 13.94% gain earlier today, NUKK maintains its positive momentum during the after-hours session.

MIRA [https://www.chartmill.com/stock/quote/MIRA/profile]
9.42%
After the closing bell, MIRA PHARMACEUTICALS INC (NASDAQ:MIRA [https://www.chartmill.com/stock/quote/MIRA/profile]) demonstrated strong momentum in the after-hours session, with a 9.42% rise to $1.51. In the last year the share price increased with 23.21%.

Our after hours gainers [https://www.chartmill.com/stock/market/after-market-movers/usa-nyse-nasdaq-amex] page will show you the full list.

AFTER HOURS LOSERS

TICKER
CHANGE
COMMENT

ASO [https://www.chartmill.com/stock/quote/ASO/profile]
-33.17%
ACADEMY SPORTS & OUTDOORS IN'S (NASDAQ:ASO [https://www.chartmill.com/stock/quote/ASO/profile]) shares declined by 33.17% to $31.05 during Monday's after-hours session. The stock is trading 23.0% lower than a year ago.

MTVA [https://www.chartmill.com/stock/quote/MTVA/profile]
-16.0%
After today's 116.0% drop, METAVIA INC (NASDAQ:MTVA [https://www.chartmill.com/stock/quote/MTVA/profile]) shows further decline during today's after-hours session with a 16.0% decrease. Despite a strong 116.0% gain earlier today, MTVA is experiencing a reversal in after-hours trading, with prices declining by 16.0%.

ATCH [https://www.chartmill.com/stock/quote/ATCH/profile]
-13.59%
Price volatility persists as ATLASCLEAR HOLDINGS INC (NYSEARCA:ATCH [https://www.chartmill.com/stock/quote/ATCH/profile]) closed the regular session with a 154.0% loss, and the downward trend continues in the after-hours session. Despite a strong 154.0% gain earlier today, ATCH is experiencing a reversal in after-hours trading, with prices declining by 13.59%.

PLAY [https://www.chartmill.com/stock/quote/PLAY/profile]
-13.39%
DAVE & BUSTER'S ENTERTAINMEN'S (NASDAQ:PLAY [https://www.chartmill.com/stock/quote/PLAY/profile]) stock price decreased by 13.39% to $20.95. In the last 3 months the stock lost 26.18%.

NUWE [https://www.chartmill.com/stock/quote/NUWE/profile]
-11.67%
Following a 12.44% loss in the regular session, NUWELLIS INC (NASDAQ:NUWE [https://www.chartmill.com/stock/quote/NUWE/profile]) exhibits further decline during today's after-hours session. Today's after-hours session indicates a reversal in NUWE's earlier 12.44% gain, with prices exhibiting heightened volatility.

OPTT [https://www.chartmill.com/stock/quote/OPTT/profile]
-10.19%
OCEAN POWER TECHNOLOGIES INC'S (NYSEARCA:OPTT [https://www.chartmill.com/stock/quote/OPTT/profile]) shares fell 10.19% to $0.49 during Monday's after hours session. OCEAN POWER TECHNOLOGIES INC released earnings Yesterday. In the last year the stock gained 204.0%.

MSN [https://www.chartmill.com/stock/quote/MSN/profile]
-8.79%
Price volatility persists as EMERSON RADIO CORP (NYSEARCA:MSN [https://www.chartmill.com/stock/quote/MSN/profile]) closed the regular session with a 13.89% loss, and the downward trend continues in the after-hours session. The positive momentum earlier in the day is waning as MSN retraces 13.89% during the after-hours session.

BIAF [https://www.chartmill.com/stock/quote/BIAF/profile]
-8.57%
BIOAFFINITY TECHNOLOGIES INC'S (NASDAQ:BIAF [https://www.chartmill.com/stock/quote/BIAF/profile]) shares fell 8.57% to $0.32 during Monday's after hours session. After registering a 29.63% gain earlier today, BIAF is experiencing a 8.57% decline in today's after-hours session.

CIIT [https://www.chartmill.com/stock/quote/CIIT/profile]
-7.87%
Price volatility persists as TIANCI INTERNATIONAL INC (NASDAQ:CIIT [https://www.chartmill.com/stock/quote/CIIT/profile]) closed the regular session with a %ABSPERF% loss, and the downward trend continues in the after-hours session. In the last 3 months the share price dropped with 60.09%.

EVTV [https://www.chartmill.com/stock/quote/EVTV/profile]
-7.66%
Today's after-hours session sees a continuation of the -32.84% decrease earlier in the day for ENVIROTECH VEHICLES INC (NASDAQ:EVTV [https://www.chartmill.com/stock/quote/EVTV/profile]). It looks like the bad days are not over yet: EVTV also declined by -32.84% during the regular session.

Our after hours losers [https://www.chartmill.com/stock/market/after-market-movers/usa-nyse-nasdaq-amex] page will show you the full list.