NEW YORK, December 30, 2025, 05:20 ET — Premarket
- Regencell Bioscience shares closed up nearly 11% on Monday after a wide intraday swing.
- A fresh law-firm “investigation” notice and an older DOJ-trading probe disclosure stayed in focus.
- Traders are watching whether the move holds once regular volume returns after the opening bell.
Regencell Bioscience Holdings Ltd shares were last indicated at $23.48 in off-hours trade ahead of Tuesday’s U.S. session.
The stock ended Monday up 10.96% at $23.48, after trading as low as $19.80 and as high as $25.50, with about 723,000 shares changing hands, MarketBeat data showed. Market capitalization was listed at roughly $11.6 billion.
The move stood out on a day when U.S. stocks finished lower, leaving investors cautious heading into a holiday-shortened stretch. Thin liquidity can exaggerate price swings in smaller, headline-sensitive names.
Regencell itself has not posted a new press release since Oct. 31, when it said it filed its annual report on Form 20-F, the SEC annual filing used by foreign private issuers.
Legal headlines have circulated again in recent days. Bronstein, Gewirtz & Grossman said on Dec. 28 it was investigating potential claims on behalf of Regencell investors, an announcement that can amplify chatter without indicating any formal finding by regulators or a court.
In its annual report, Regencell disclosed it received correspondence and a subpoena from the U.S. Department of Justice indicating an investigation into trading in its ordinary shares, following prior volatility.
After-hours trading on Monday was modest, with the stock quoted at $23.48 and up about 1.75%, according to Barron’s market data.
Regencell is a Hong Kong-based early-stage bioscience company focused on traditional Chinese medicine formulations for neurocognitive disorders, including attention deficit hyperactivity disorder and autism spectrum disorder, according to its company profile.
On Monday, the shares opened sharply lower than the prior close — a “gap down,” meaning the first trade printed below the previous session’s closing price — before reversing higher, MarketBeat said. MarketBeat
