Was Yvonne Wassenaar’s Rubrik (RBRK) share sale under a Rule 10b5-1 plan?

Yes. The filing notes the sale was effected under a Rule 10b5-1 trading plan adopted on December 15, 2025. Such plans pre-schedule trades, reducing the significance of short-term market timing decisions.

Rubrik (RBRK) director executes 721-share Rule 10b5-1 stock sale

Filing Impact

(Neutral)

Filing Sentiment

(Negative)

Form Type

Rhea-AI Filing Summary

Rubrik, Inc. director Yvonne Wassenaar reported an open-market sale of 721 shares of Class A Common Stock at $81.57 per share. After this transaction, she directly holds 4,638 shares of Rubrik stock. The sale was carried out under a pre-arranged Rule 10b5-1 trading plan adopted on December 15, 2025, indicating it was scheduled in advance rather than timed discretionarily.

Insider Trade Summary 10b5-1

Net Seller: 721 shares ($58,812)

Net Sell 1 txn

Insider Wassenaar Yvonne

Role null

Sold 721 shs ($59K)

Type	Security	Shares	Price	Value
Sale	Class A Common Stock	721	$81.57	$59K

Holdings After Transaction: Class A Common Stock — 4,638 shares (Direct, null)

Footnotes (1)

[object Object]

Key Figures

Shares sold: 721 shares Sale price: $81.57 per share Shares held after sale: 4,638 shares +2 more

5 metrics

Shares sold 721 shares Open-market sale on July 1, 2026

Sale price $81.57 per share Price for Class A Common Stock in reported sale

Shares held after sale 4,638 shares Direct ownership following the transaction

Net shares sold 721 shares transactionSummary netBuySellShares

Sell transactions count 1 transaction transactionSummary sellCount

Key Terms

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

4 terms

Rule 10b5-1 trading plan regulatory

"sale reported on this Form 4 was effected 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""

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.

Class A Common Stock financial

""security_title": "Class A Common Stock""

Class A common stock is a category of a company’s shares that carries a specific set of ownership rights—most commonly defined voting power and claims on dividends—set out in the company’s charter. For investors it matters because the class determines how much influence you have over corporate decisions, the share’s likely dividend and trading behavior, and how it compares in value to other share classes, like choosing a particular seat with different privileges at the company’s decision-making table.

Form 4 regulatory

"This sale reported on this Form 4 was effected pursuant to a Rule 10b5-1"

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.

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Form 4 Insider Transactions: What Each Field Means →

Available on EDGAR 07/01/2026 - 07:39 PM Accepted by SEC EDGAR 07/01/2026 - 07:38 PM

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^*

Wassenaar Yvonne

(Last)

(First)

(Middle)

C/O RUBRIK INC.

3495 DEER CREEK ROAD

(Street)

PALO ALTO

CALIFORNIA

94304

(City)

(State)

(Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
Rubrik, Inc. [ RBRK ]

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)
07/01/2026

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 Common Stock	07/01/2026		S⁽¹⁾		721	D	$81.57	4,638	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. This sale reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan, adopted December 15, 2025.

	/s/ Larry Guo, Attorney-in-Fact	07/01/2026
	** 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 Rubrik (RBRK) director Yvonne Wassenaar report?

Yvonne Wassenaar reported an open-market sale of 721 shares of Rubrik Class A Common Stock at $81.57 per share. This single transaction reduced her direct holdings but left her with 4,638 shares remaining after the sale.

At what price did Yvonne Wassenaar sell Rubrik (RBRK) shares?

She sold 721 Rubrik Class A Common Stock shares at $81.57 per share. This price reflects the execution level for the reported open-market transaction disclosed in the Form 4 insider trading report.

How many Rubrik (RBRK) shares does Yvonne Wassenaar hold after the sale?

Following the reported sale, Yvonne Wassenaar directly holds 4,638 shares of Rubrik Class A Common Stock. This figure is disclosed as her post-transaction ownership in the insider filing’s non-derivative securities table.

How many insider sell transactions did Rubrik (RBRK) report for Yvonne Wassenaar in this Form 4?

The Form 4 shows one sell transaction for Yvonne Wassenaar, totaling 721 shares. The transaction summary records a sellCount of 1 and netBuySellShares of -721, indicating only this single net-sell event in the filing.