The Korolenko sale is large in absolute terms but modest relative to market cap. The cross-filing amplifiers (earnings, offering, press) suggest this cluster may carry more weight than standalone. However, the model's poor historical track record on NBIS bearish calls (20% win rate, -21% avg T+20) argues against aggressive short positioning. Monitor for additional insider sales or a material adverse event in the next 10-Q.
Price Chart
Executive Summary
Three insiders at Nebius Group sold a total of $103.6M in stock over a 7-day window, led by Chief Infrastructure Officer Andrey Korolenko's $101.6M open-market sale following derivative exercises. The total sales represent ~0.2% of the $50.7B market cap, which is modest in relative terms, but the involvement of a C-suite officer in a multi-hundred-million-dollar sale is notable. The cluster is amplified by cross-filing context (earnings, offering, and press activity), though the historical calibration on this ticker shows past bearish calls have underperformed, suggesting caution in over-interpreting the signal.
Key Financial Metrics
Key Facts
- Chief Infrastructure Officer Korolenko sold 1M shares for $101.6M after exercising derivatives at $0 cost basis
- Chief Revenue Officer Boroditsky sold 4,500 shares for $979K on May 15
- Director Bunina sold 5,000 shares for $1.02M on May 13
- Total cluster value: $103.6M, representing ~0.2% of $50.7B market cap
- All sales were open-market transactions; no 10b5-1 pattern identified
- Past bearish calls on NBIS have averaged -21% at T+20, but the model's win rate is only 20%
Financial Impact
Insider sales of $103.6M, ~0.2% of market cap; C-suite officer sold $101.6M
Risk Factors
- Insider sales may be liquidity-driven after derivative exercises, not a bearish signal
- Historical calibration shows bearish calls on NBIS have been wrong 80% of the time at T+20
- 0.2% of market cap is below the 0.5% threshold for 'significant' insider selling
Market Snapshot
Investment Themes
Documents Analyzed
This report is based on 1 SEC document filed with EDGAR.
| Document | Accession Number |
|---|---|
| CLUSTER Data (Synthetic) | cluster-NBIS-1779208466653 |
Filters
| Type | Now | ||||
|---|---|---|---|---|---|
Aug 26, 2026 5w ago | 6-K | $213.93 $243.48 | ▲ +13.81% | ▲ +13.59% | $242.81 (+13.50%) |
Aug 20, 2026 6w ago | 6-K | $220.11 $223.54 | ▲ +1.56% | ▲ +1.56% | $242.81 (+10.31%) |
Aug 19, 2026 6w ago | 6-K | $223.90 $217.99 | ▲ +2.64% | ▲ +0.69% | $242.81 (−8.45%) |
Aug 18, 2026 6w ago | Insider Cluster | $248.43 $209.37 | ▼ −15.72% | ▼ −14.41% | $242.81 (−2.26%) |
Aug 12, 2026 7w ago | 6-K | $255.04 $224.55 | ▼ −11.96% | ▼ −10.21% | $242.81 (−4.80%) |
Jul 17, 2026 11w ago | 6-K | $177.71 $277.68 | ▲ +56.25% | ▲ +51.81% | $242.81 (+36.63%) |
Jul 6, 2026 12w ago | Insider Cluster | $213.02 $190.41 | ▲ +10.61% | ▲ +10.05% | $242.81 (−13.98%) |
Jul 6, 2026 12w ago | Insider Cluster | $213.02 $190.41 | ▼ −10.61% | ▼ −10.05% | $242.81 (+13.98%) |
Jun 16, 2026 15w ago | 6-K | $265.10 $194.09 | ▼ −26.79% | ▼ −26.99% | $242.81 (−8.41%) |
Jun 5, 2026 17w ago | Insider Cluster | $227.81 $213.02 | ▼ −6.49% | ▼ −8.35% | $242.81 (+6.58%) |
US Market Status
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