Were Elena Bunina’s Nebius Group (NBIS) share sales pre-planned?

Yes, the sales were made under a Rule 10b5-1 trading plan. A footnote explains that the May 13, 2026 transactions followed a trading plan adopted on November 24, 2025, indicating they were scheduled in advance.

Nebius Group (NBIS) director sells 10,894 shares under 10b5-1 plan

Q: How many Nebius Group (NBIS) shares did Elena Bunina sell in total?

The filing shows total sales of 10,894 Class A Shares. According to the transaction summary, two open-market sale transactions on May 13, 2026, together amounted to 10,894 shares sold by the director.

Q: Did the Nebius Group (NBIS) Form 4 include any derivative transactions?

No, the Form 4 did not report any derivative transactions. The derivative transaction count and exerciseShares in the transaction summary are zero, and the derivativeSummary section is empty for this filing.

Filing Impact

(Very High)

Filing Sentiment

(Negative)

Form Type

Rhea-AI Filing Summary

Nebius Group N.V. director Elena Bunina reported selling 10,894 Class A Shares of NBIS. On May 13, 2026, she executed two open-market sales: 5,894 shares at $210.00 per share and 5,000 shares at $203.18 per share. The filing states these sales were made under a pre-arranged Rule 10b5-1 trading plan adopted on November 24, 2025, indicating they were scheduled in advance rather than timed discretionarily. No derivative transactions were reported in this filing.

Insider Trade Summary 10b5-1

Net Seller: 10,894 shares ($2,253,640)

Net Sell 2 txns

Insider Bunina Elena

Role null

Sold 10,894 shs ($2.25M)

Type	Security	Shares	Price	Value
Sale	Class A Shares	5,000	$203.18	$1.02M
Sale	Class A Shares	5,894	$210.00	$1.24M

Holdings After Transaction: Class A Shares — 16,666 shares (Direct, null)

Footnotes (1)

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Key Figures

Shares sold (total): 10,894 shares First trade size: 5,894 shares First trade price: $210.00 per share +3 more

6 metrics

Shares sold (total) 10,894 shares Total Class A Shares sold on May 13, 2026

First trade size 5,894 shares Class A Shares sold at $210.00 on May 13, 2026

First trade price $210.00 per share Open-market sale of 5,894 Class A Shares

Second trade size 5,000 shares Class A Shares sold at $203.18 on May 13, 2026

Second trade price $203.18 per share Open-market sale of 5,000 Class A Shares

Net share activity 10,894 shares sold Net-sell direction per transaction summary

Key Terms

Rule 10b5-1 trading plan, open-market sale, Form 4, Class A Shares

4 terms

Rule 10b5-1 trading plan financial

"The sales reported on this Form 4 were made pursuant to a Rule 10b5-1 trading plan"

A Rule 10b5-1 trading plan is a pre-arranged schedule that allows company insiders to buy or sell stock at specific times, even if they have inside information. It helps prevent accusations of unfair trading by making these transactions look planned and transparent, rather than sneaky or illegal.

open-market sale financial

"transaction_action: "open-market sale" for each Class A Shares transaction"

An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.

Form 4 financial

"The sales reported on this Form 4 were made pursuant to a Rule 10b5-1 trading plan"

Form 4 is a official document that company insiders, such as executives or major shareholders, file with regulators whenever they buy or sell company shares. It provides transparency about how those with inside knowledge are trading, helping investors see if insiders are confident in the company's prospects or may be selling for personal reasons. This information can influence investor decisions by revealing insiders' perspectives on the company's value.

Class A Shares financial

"security_title: "Class A Shares" for both non-derivative transactions"

Class A shares are one of a company’s distinct types of stock that come with a specific set of rights—commonly different voting power, dividend treatment, or transfer rules—defined in the company’s charter. Investors care because those rights affect control, income and resale value; like holding a seat at a table that has different rules or stronger chips than other seats, owning Class A changes how much influence and return you can expect.

Form 4 Insider Transactions: What Each Field Means →

05/15/2026 - 09:59 AM

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Bunina Elena

(Last)

(First)

(Middle)

SCHIPHOL BOULEVARD 165

(Street)

SCHIPHOL

1118BG

(City)

(State)

(Zip)

NETHERLANDS

(Country)

2. Issuer Name and Ticker or Trading Symbol
Nebius Group N.V. [ NBIS ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director	10% Owner
	Officer (give title below)	Other (specify below)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/13/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Class A Shares	05/13/2026		S		5,000⁽¹⁾	D	$203.18	16,666	D
Class A Shares	05/13/2026		S		5,894⁽¹⁾	D	$210	10,772	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)

Explanation of Responses:

1. The sales reported on this Form 4 were made pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on November 24, 2025.

Remarks:

Exhibit 24 - Power of Attorney

	/s/ Anna Akimova, attorney-in fact for Ms. Bunina	05/15/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)

Source: View Original Filing on SEC EDGAR

FAQ

What insider transaction did Nebius Group (NBIS) report for Elena Bunina?

Elena Bunina reported selling 10,894 Nebius Group Class A Shares. The Form 4 shows two open-market sales totaling 10,894 shares on May 13, 2026, as part of a pre-arranged Rule 10b5-1 trading plan.

At what prices did Elena Bunina sell Nebius Group (NBIS) shares?

The reported sales occurred at prices of $210.00 and $203.18 per share. One trade covered 5,894 Class A Shares at $210.00, and another covered 5,000 shares at $203.18, both executed on May 13, 2026.

How many Nebius Group (NBIS) shares did Elena Bunina sell in total?

The filing shows total sales of 10,894 Class A Shares. According to the transaction summary, two open-market sale transactions on May 13, 2026, together amounted to 10,894 shares sold by the director.

Did the Nebius Group (NBIS) Form 4 include any derivative transactions?

No, the Form 4 did not report any derivative transactions. The derivative transaction count and exerciseShares in the transaction summary are zero, and the derivativeSummary section is empty for this filing.

Was Elena Bunina’s Nebius Group (NBIS) ownership direct or indirect?

The reported Nebius Group holdings involved direct ownership. Each transaction is marked with ownership code “D” and ownership type “direct,” with no footnote indicating that another entity held voting or investment authority over the shares.