Top Movers Shakers Driving Buzz Today

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Top.Gainers highlighting the top gainers of the day, providing timely updates and insights on the market's highest achievers.
 

•  18 Dec 2025
 

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•   ATHA  
   
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•   DJT  
   
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•   EVTV  
   
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$ATHA Athira Pharma surged an astonishing 70% after announcing an exclusive license for its Lasofoxifene Phase 3 development program targeting metastatic breast cancer. The company also secured financing up to $236 million, sparking a wave of investor enthusiasm. The combination of a promising clinical asset and a solid capital infusion has clearly captured the market’s attention, driving heavy volume and a sharp upward move in shares. Traders and biotech watchers alike are eyeing this as a potentially transformative moment for ATHA.

$SOC Sable Offshore jumped 56% following federal confirmation of interstate pipeline classification, igniting significant after-hours buying. Investors are reacting to the regulatory clarity, which could enhance the company’s operational and revenue prospects. Coupled with unusually high trading volume, the stock’s rally reflects a mix of optimism about future cash flows and momentum-driven interest from traders seeking short-term gains.

$VIVK Vivakor spiked 41% after hours, propelled by regulatory updates and financial developments from the oil and environmental services firm. The news appears to have reassured investors about the company’s near-term prospects and operational trajectory. Heavy volume indicates that both retail and institutional participants are closely monitoring VIVK, contributing to its strong price action in the extended session.

$DJT Trump Media soared 42% on the announcement of a $6 billion merger with TAE Technologies, a nuclear fusion company. This high-profile all-stock deal has captured the market’s imagination, highlighting a bold pivot into advanced energy technology. Investor sentiment is clearly buoyed by the potential for the combined company to enter public markets with a fusion-powered growth narrative, attracting traders looking for speculative upside in emerging tech sectors.

$ISSC Innovative Solutions and Support surged 31% after exceeding Q4 earnings and revenue estimates by a wide margin, reporting GAAP EPS of $0.39 and revenue of $22.2 million. The strong financial performance, combined with positive guidance, has spurred confidence among market participants. The stock’s move reflects both fundamental strength and momentum as traders react to solid results and upward revisions.

$EVTV Envirotech Vehicles, despite news of a potential $480 million AI acquisition, fell sharply 35% as concerns about execution risks and prior losses weighed on sentiment. The stock’s drop highlights the volatility often present in smaller-cap names undergoing transformative deals, emphasizing caution for traders considering entry.

$HOWL Werewolf Therapeutics declined nearly 40% after interim clinical data disappointed or raised questions about progress on lead candidates. Investors reacted quickly to adjust valuations, reflecting heightened sensitivity in the biotech sector to trial updates.

$ASNS Actelis Networks slid 43% following the pricing of a $5 million public offering, raising capital through a securities offering. The market interpreted the equity raise as dilutive, and the stock extended a multi-day decline as investors adjusted to the new share count and potential impact on earnings.

$GANX Gain Therapeutics fell 44% despite announcing positive Phase 1b results in Parkinson’s disease, illustrating how early-stage biotech outcomes can sometimes disappoint market expectations. Traders appear focused on broader sentiment and pipeline risk, resulting in a steep pullback despite the promising science.

$PYXS Pyxis Oncology dropped 49% after preliminary Phase 1 data for its MICVO candidate was disclosed. While clinical-stage data can be promising, the market often reacts negatively when early results are not immediately transformative or if expectations were overly high, resulting in a strong sell-off.

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