Nebius Group N.V. (NBIS)
Nebius Group N.V. · NBIS · data through 2026-10-16 · free to read
NBIS unusual options activity and options flow
What is the options flow saying about NBIS?
On 2026-10-16, Nebius Group N.V. (NBIS) traded $146.2M of call premium against $282.7M of put premium, 34% of it on the call side. The tape leans puts. Volume and open interest below, updated after each close.
The session's options tape
How much open interest is standing
Across 50 sessions to 2026-10-16, NBIS carries 32k of call open interest against 81k of puts, a put/call ratio of 2.56. Open interest is what is still on the book, as opposed to what changed hands today.
Where the premium has gone over three months
From 2026-07-21 to 2026-10-16, cumulative call premium reached $9.3B against $6.3B on puts, a net of +$3.0B. One day's flow is noise; the cumulative line is where a lean shows up.
NBIS gamma exposure
Where is dealer gamma on NBIS?
As of 2026-10-16, dealer gamma on Nebius Group N.V. (NBIS) is negative, so dealer hedging amplifies moves. The sign has flipped 8 times over the window shown. A flip matters more than the level: it changes whether hedging flow works with the move or against it.
What dealer gamma has done
Total dealer gamma exposure on NBIS over 50 sessions, 2026-08-10 to 2026-10-16. The sign flipped 8 times in that window.
When dealer gamma is positive, hedging leans against the move and tends to compress the range. When it is negative, hedging runs with the move and tends to extend it. The flip is the event worth watching, not the level.
NBIS insider buying and selling
Are insiders buying or selling NBIS?
10 reported insider transactions in Nebius Group N.V. (NBIS), 1 on the buy side. Officers and directors must file within two business days, so this is the least delayed ownership signal available. Names, titles and amounts below.
| Insider | Title | Side | Value | Avg price | Seen |
|---|---|---|---|---|---|
| Grimme Arne | Dir | buy | 50317 | 169.99 | 2026-10-16 |
| Nave Ophir | COO | sell | 117765468 | 235.53 | 2026-10-16 |
| Boroditsky Marc | Chief Revenue Officer | sell | 1478610 | 211.23 | 2026-10-13 |
| Korolenko Andrey | Chief Infrastructure Officer | sell | 6811714 | 234.16 | 2026-10-05 |
| Shtan Danila | CTO | sell | 3406091 | 234.16 | 2026-10-05 |
| Volozh Arkadiy | CEO, 10% | sell | 8846096 | 234.16 | 2026-10-05 |
| Boroditsky Marc | Chief Revenue Officer | sell | 5535042 | 205.87 | 2026-09-21 |
| Ryan Charles E | Dir | sell | 13276633 | 265.53 | 2026-08-18 |
| Volozh Arkadiy | CEO, 10% | sell | 10978327 | 235.45 | 2026-07-10 |
| Korolenko Andrey | Chief Infrastructure Officer | sell | 203240000 | 203.24 | 2026-05-29 |
Officers and directors file a Form 4 within two business days of a transaction, which makes this the least delayed ownership signal available. A sale can mean many things, including a scheduled plan; a cluster of open-market buys is the rarer event.
Common questions about NBIS
What does the options flow on NBIS actually mean?
It is the money that changed hands in NBIS options on 2026-10-16: $146.2M paid for calls, $282.7M for puts. Premium is the better read than contract count, because a thousand cheap far-dated calls and one large near-dated block are not the same conviction, and only premium tells them apart.
Is heavy call buying in NBIS bullish?
Not by itself. 34% of NBIS's premium sat on the call side, and a good share of any day's call volume is someone hedging a short, closing a position, or a market maker managing inventory. Flow says where money went, never why. It is one input among several, which is how it is weighted on the desk.
What is the difference between volume and open interest on NBIS?
Volume is what traded today: 310891 calls and 217116 puts. Open interest is what is still on the book afterwards, currently 32k of calls against 81k of puts. Volume can spike and vanish the same day; open interest rising means positions were opened rather than closed.
What is dealer gamma exposure on NBIS?
It is the aggregate gamma the market makers who sold NBIS options are carrying. It matters because they hedge it, and that hedging is real buying and selling in the stock. As of 2026-10-16 it is negative.
What happens when NBIS gamma is positive versus negative?
Positive gamma means dealers sell into strength and buy weakness, which compresses the range and makes moves fade. Negative gamma means they do the opposite, selling weakness and buying strength, which extends moves. Same stock, opposite character, depending only on which side dealers are on.
Why do the sign flips matter more than the level?
Because the flip is when the behaviour changes. NBIS has flipped 8 times across the window shown here. A large positive number tells you little on its own; crossing zero tells you hedging flow just switched from working against the move to working with it.
Are insiders buying or selling NBIS?
Across the filings shown here, 1 buy-side and 9 sell-side transactions in Nebius Group N.V.. Each row names the insider, their title and the value, because a director's purchase and a CEO's scheduled sale are not the same event even when the dollar figure matches.
Does insider selling in NBIS mean something is wrong?
Usually not. Executives are paid in stock and sell for tax bills, houses and diversification, much of it through pre-scheduled 10b5-1 plans set months in advance. Selling is the normal state. It is the absence of buying, over long stretches, that says more than any single sale.
Why does insider buying carry more weight?
Because there is one reason to buy your own company's stock with your own money and many reasons to sell. A cluster of open-market purchases by several NBIS insiders in the same window is the version worth noticing; a single small buy near a proxy deadline is often optics.
More on NBIS
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