NEW YORK, December 29, 2025, 19:45 ET — After-hours
- Nebius Group shares fell 1.8% to $86.04 after filings flagged planned insider sales tied to “sell-to-cover” transactions. SEC+2SEC+2
- Founder Arkady Volozh and two other insiders disclosed plans to sell a combined 45,600 shares, with trades listed for Dec. 31 and Jan. 2.
- The Nasdaq fell 0.5% as investors trimmed risk positions into the final sessions of 2025.
Nebius Group N.V. shares slid on Monday after SEC filings showed founder Arkady Volozh and two other insiders planned share sales around year-end. The stock was down 1.8% at $86.04 in late trade.
The notices matter now because NBIS has been a high-beta trade — a stock that tends to swing more than the market — and additional supply can weigh on prices when liquidity is thin in the final days of the year.
The filings landed as U.S. stocks dipped broadly, with the Nasdaq ending down 0.5%. “We’re seeing a reversal of what we saw over the last couple of days,” said Rob Haworth at U.S. Bank Wealth Management. Investing.com Australia
Nebius traded between $84.25 and $88.55 on Monday, with about 8.1 million shares changing hands, according to trade data.
Three Form 144 filings dated Dec. 29 listed proposed sales of 41,000 shares by Volozh and 2,300 shares each by Nave Ophir and Elena Bunina, for a combined 45,600 shares, or about $4.0 million based on the indicative pricing in the filings.
A Form 144 is a notice that an affiliate of a company plans to sell shares under Rule 144; it is not confirmation the sale has occurred. The filings described the sales as “sell-to-cover” transactions — shares sold to cover taxes tied to equity awards and board compensation — and listed planned trade windows on Dec. 31 and Jan. 2. SEC+2SEC+2
Nebius, a Netherlands-based AI infrastructure provider, has drawn investor attention this year after it signed multi-billion dollar supply agreements to provide GPU capacity — high-end chips used to train and run AI models — to Microsoft and Meta.
In a Nov. 12 regulatory filing describing the Meta agreement, the company said the GPU services were slated to be deployed in two tranches during December 2025 and February 2026, alongside storage and connectivity.
Investors have also focused on how Nebius funds its buildout. The company raised $4.2 billion through a public share offering and sale of convertible notes after the Microsoft deal, Reuters reported earlier this month.
On the last earnings update, Nebius reported a sharp rise in capital spending and a wider quarterly loss, even as it disclosed the Meta deal, underscoring the cash demands of scaling data center capacity.
Nebius competes for enterprise workloads with U.S. hyperscalers such as Amazon and Google, while pitching specialized AI infrastructure to customers that want access to advanced GPUs and related software, Reuters has reported.
Traders will be watching whether the planned sell-to-cover transactions show up in tape data during the thin holiday week, and whether the stock holds above Monday’s $84 area while liquidity remains patchy into year-end.
Nebius has not posted its next earnings date under “Upcoming Events” on its investor events calendar, leaving the next scheduled update unclear as the market heads into the final sessions of 2025. nebius.com
