The CIO selling $101.6M in a single trade dwarfs all other insider activity — find out whether this was a 10b5-1 plan or discretionary; if unplanned, it signals acute conviction. Compare the sale price (~$203) to the $217.55 level where CRO sold two days later — the stepped-down pricing could suggest urgency. Given the poor historical track record of model calls on NBIS (T+20 avg alpha -16%), consider pairing this bearish signal with a tight stop or hedging rather than an outright short.
Price Chart
Executive Summary
Four Nebius insiders sold a combined $104.1M in shares over an 8-day window, led by Chief Infrastructure Officer Korolenko Andrey's $101.6M open-market sale. This is highly material relative to the $55.8B market cap (~0.19%), and the cluster includes C-suite executives (CIO, CRO) acting in concert. The selling coincides with recent offering and earnings contexts — cross-filing actuarial data flags this combo as an amplifier. Despite the 77% bullish analyst consensus, the magnitude, seniority, and clustered timing of sales suggest insiders are taking significant chips off the table.
Key Financial Metrics
Key Facts
- Cluster total $104.13M in open-market sales from 4 insiders (May 13–20, 2026)
- CIO Korolenko alone sold $101.62M (500K shares at ~$203.24)
- CRO Boroditsky sold $979K (4.5K shares at $217.55) on May 15
- Director Bunina sold $1.02M and GC Boaz sold $517K
- Total cluster value represents ~0.19% of $55.8B market cap — proportionally significant
- Prior 30-day insider activity already included $206.8M in sells
- 10 of 12 contextual cross-filing combos on record are flagged as actuarial amplifiers
- Historical model performance on NBIS has been poor (average T+20 alpha -16.3%, win rate 20%)
Financial Impact
$104.13M in aggregate insider open-market sales
Risk Factors
- Insider sales may be part of pre-arranged 10b5-1 plans, reducing their informational content
- Analyst consensus is 77% bullish; strong buy-side sentiment could absorb selling pressure
- Historical cluster sells carry lower predictive power than cluster buys per academic literature
- Model's own T+20 alpha on NBIS is deeply negative, suggesting the stock has persistently defied bearish signals
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-1779468093630 |
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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