Friday's after hours session: top gainers and losers

By Mill Chart - Last update: Sep 5, 2025

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


postmarket

Today's after hours gainers

TickerChangeComment
GTBP29.79%Impressive after-hours gains for GT BIOPHARMA INC (NASDAQ:GTBP) as its stock price advanced 29.79% to $1.22 during Friday's after-hours session. Shareholders saw the stock price going 48.36% lower in the past month.
RAPP23.26%RAPPORT THERAPEUTICS INC's (NASDAQ:RAPP) shares rose 23.26% to $17.7 during Friday's after hours session. In the last 6 months the stock gained 67.17%.
CLRO22.0%Positive after-hours movement for CLEARONE INC (NASDAQ:CLRO) as its shares recorded a 22.0% increase, reaching $5.99 during Friday's after-hours session. This is a continuation of today's gain of 18.31%.
OPTX20.67%Promising after-hours performance observed for SYNTEC OPTICS HOLDINGS INC (NASDAQ:OPTX) as its shares surged 20.67% to $1.81 during Friday's after-hours trading. Earlier today the company had a press release: Syntec Optics (Nasdaq: OPTX) Launches Pioneering New York State Apprenticeship Program to Foster U.S. Advanced Manufacturing.
HOUR15.62%In the after-hours session on Friday, HOUR LOOP INC (NASDAQ:HOUR) experienced a notable 15.62% increase, driving its shares to $4.22. This is a continuation of today's 93.12% gain, as HOUR maintains its upward trajectory in the after-hours session.
CIGL13.21%CONCORDE INTERNATION-CLASS A (NASDAQ:CIGL) showcases remarkable after-hours performance, with a 13.21% rise to $4.8 during Friday's after-hours trading. After a notable 45.7% gain earlier today, CIGL maintains its positive momentum during the after-hours session.
ACRV12.77%Impressive after-hours gains for ACRIVON THERAPEUTICS INC (NASDAQ:ACRV) as its stock price advanced 12.77% to $1.5 during Friday's after-hours session. In the last 6 months the share price dropped with 75.99%.
SKYQ11.08%Notable gains for SKY QUARRY INC (NASDAQ:SKYQ) in the after-hours session, with a 11.08% rise to $0.46 during Friday. Shareholders saw the stock price going 50.25% lower in the past 3 months.
TNFA10.3%TNF PHARMACEUTICALS INC (NASDAQ:TNFA) showcases remarkable after-hours performance, with a 10.3% rise to $3.64 during Friday's after-hours trading. In the last month the stock lost 66.46%.
GRYP9.41%Notable gains for GRYPHON DIGITAL MINING INC (NASDAQ:GRYP) in the after-hours session, with a 9.41% rise to $1.51 during Friday. Following a -10.39% loss in the regular session, GRYP displays significant price volatility in today's after-hours session.

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

After hours losers

TickerChangeComment
GNPX-14.38%Price volatility persists as GENPREX INC (NASDAQ:GNPX) closed the regular session with a 47.4% loss, and the downward trend continues in the after-hours session. Price volatility intensifies as GNPX retraces its 47.4% gain during the after-hours session.
PFAI-8.85%PINNACLE FOOD GROUP LTD-A's (NASDAQ:PFAI) shares fell 8.85% to $2.37 during Friday's after hours session. After running up 44.44% in today's session, PFAI is pulling back after hours.
CREG-8.16%Today's after-hours session sees a continuation of the 10.54% decrease earlier in the day for SMART POWERR CORP (NASDAQ:CREG). Following today's 10.54% gain, CREG experiences a 8.16% decline in today's after-hours session.
VEEE-8.1%Following a 46.39% loss in the regular session, TWIN VEE POWERCATS CO (NASDAQ:VEEE) exhibits further decline during today's after-hours session. Despite a strong 46.39% gain earlier today, VEEE is experiencing a reversal in after-hours trading, with prices declining by 8.1%.
WAI-6.9%TOP KINGWIN LTD-A's (NASDAQ:WAI) shares fell 6.9% to $0.11 during Friday's after hours session. A press release (Top KingWin Ltd Announces 1-For-25 Reverse Share Split) was released two days ago.
CARM-6.74%CARISMA THERAPEUTICS INC's (NASDAQ:CARM) shares declined by 6.74% to $0.37 during Friday's after-hours session. Prices are quite volatile now: this is a reversal from 25.59% gain.
KXIN-6.34%Following a 13.57% loss in the regular session, KAIXIN HOLDINGS (NASDAQ:KXIN) exhibits further decline during today's after-hours session. Prices are quite volatile now: this is a reversal from 13.57% gain.
HKPD-5.79%Price volatility persists as HONG KONG PHARMA DIGITAL TEC (NASDAQ:HKPD) closed the regular session with a 16.35% loss, and the downward trend continues in the after-hours session. After a notable 16.35% increase earlier today, HKPD shows signs of a pullback during the after-hours session.
MSPR-5.49%MSP RECOVERY INC's (NASDAQ:MSPR) stock price is showing a decline of 5.49% to a price of $2.41 during the after-hours session. After running up 13.84% in today's session, MSPR is pulling back after hours.

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

CLEARONE INC

NASDAQ:CLRO (2/20/2026, 8:24:43 PM)

After market: 5.2834 +0.02 (+0.44%)

5.26

-1.04 (-16.44%)


SMART POWERR CORP

NASDAQ:CREG (2/20/2026, 8:25:47 PM)

1.29

+0.02 (+1.57%)


GENPREX INC

NASDAQ:GNPX (2/20/2026, 8:00:01 PM)

After market: 1.85 +0.07 (+3.93%)

1.78

-0.08 (-4.3%)


KAIXIN HOLDINGS

NASDAQ:KXIN (2/20/2026, 8:00:01 PM)

After market: 0.605 +0.05 (+9.68%)

0.5516

-0.05 (-8.22%)


GT BIOPHARMA INC

NASDAQ:GTBP (2/20/2026, 8:00:01 PM)

After market: 0.4555 0 (-0.98%)

0.46

+0 (+0.86%)


TWIN VEE POWERCATS CO

NASDAQ:VEEE (2/20/2026, 8:09:18 PM)

After market: 0.457 +0.01 (+1.51%)

0.4502

-0.49 (-51.92%)


HOUR LOOP INC

NASDAQ:HOUR (2/20/2026, 8:00:01 PM)

1.97

+0.01 (+0.51%)


MSP RECOVERY INC

NASDAQ:MSPR (12/19/2025, 8:04:10 PM)

After market: 0.2055 +0.01 (+2.7%)

0.2001

-0.06 (-23.07%)


ACRIVON THERAPEUTICS INC

NASDAQ:ACRV (2/20/2026, 8:15:50 PM)

After market: 1.54 +0.01 (+0.65%)

1.53

-0.05 (-3.16%)


CARISMA THERAPEUTICS INC

NASDAQ:CARM (10/10/2025, 9:13:56 PM)

After market: 0.1181 -0.04 (-23.26%)

0.1539

-0.12 (-43.81%)


SYNTEC OPTICS HOLDINGS INC

NASDAQ:OPTX (2/20/2026, 8:00:01 PM)

After market: 6.14 -0.04 (-0.65%)

6.18

-0.09 (-1.44%)


GRYPHON DIGITAL MINING INC

NASDAQ:GRYP (9/2/2025, 8:07:40 PM)

After market: 1.5099 +0.13 (+9.41%)

1.38

-0.16 (-10.39%)


RAPPORT THERAPEUTICS INC

NASDAQ:RAPP (2/20/2026, 8:01:11 PM)

After market: 29.76 0 (0%)

29.76

-0.23 (-0.77%)


TNF PHARMACEUTICALS INC

NASDAQ:TNFA (9/24/2025, 8:00:01 PM)

After market: 4.4801 -0.72 (-13.84%)

5.2

+1.69 (+48.15%)


SKY QUARRY INC

NASDAQ:SKYQ (2/20/2026, 8:05:12 PM)

After market: 0.3386 -0.02 (-5.94%)

0.36

-0.02 (-5.83%)


TOP KINGWIN LTD-A

NASDAQ:WAI (2/20/2026, 8:10:15 PM)

After market: 2.4 -0.03 (-1.23%)

2.43

-0.11 (-4.33%)


CELLYAN BIOTECHNOLOGY CO-A

NASDAQ:HKPD (2/20/2026, 8:00:01 PM)

After market: 0.75 +0.08 (+11.94%)

0.67

-0.03 (-3.97%)


PINNACLE FOOD GROUP LTD-A

NASDAQ:PFAI (2/20/2026, 8:00:01 PM)

2.305

+0.06 (+2.9%)


CONCORDE INTERNATION-CLASS A

NASDAQ:CIGL (2/20/2026, 8:23:24 PM)

After market: 1.72 0 (0%)

1.72

+0.05 (+2.99%)



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