Rubrik director sells 721 shares at $89.52

Rhea-AI Filing Summary

Rubrik, Inc. (RBRK) director Yvonne Wassenaar reported an automatic conversion of 513 shares of Class B Common Stock into 513 shares of Class A Common Stock on September 3, 2026, followed by a sale of 721 Class A shares at $89.52 per share under a Rule 10b5-1 trading plan adopted December 15, 2025. After the conversion, 32,603 Class B shares remained held directly.

Insider Trade Summary 10b5-1

Exercise and sale activity reported; no spread calculated

Exercise and Sale 3 txns

Insider Wassenaar Yvonne

Role Director

Sold 721 shs ($65K)

Approx. gross sale proceeds $65K

Type	Security	Shares	Price	Value
Conversion	Class B Common Stock F2	513	$0.00	$0.00
Conversion	Class A Common Stock	513	$0.00	$0.00
Sale	Class A Common Stock F1	721	$89.52	$65K

Holdings After Transaction: Class B Common Stock — 32,603 contracts (Direct); Class A Common Stock — 3,709 shares (Direct)

Footnotes (2)

1. F1. This sale reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan, adopted December 15, 2025.
2. F2. Each share of Class B Common Stock held by the Reporting Person will automatically convert into one share of Class A Common Stock upon the sale or transfer of such share of Class B Common Stock, subject to certain exceptions, and in certain other circumstances described in the Issuer's amended and restated certificate of incorporation. Each share of Class B Common Stock will also be convertible at any time at the option of the Reporting Person into one share of Class A Common Stock and has no expiration date.

Key Figures

Class A shares sold: 721 shares Sale price per Class A share: $89.52 per share Class B shares converted: 513 shares +3 more

6 metrics

Class A shares sold 721 shares Sale of Class A Common Stock on September 3, 2026

Sale price per Class A share $89.52 per share Open-market or private sale on September 3, 2026

Class B shares converted 513 shares Conversion of Class B into Class A on September 3, 2026

Class A shares received on conversion 513 shares Underlying Class A Common Stock from Class B conversion

Class B shares held after transaction 32,603 shares Direct Class B holdings following the conversion

Rule 10b5-1 plan adoption date December 15, 2025 Plan governing the reported sale transaction

Key Terms

Rule 10b5-1 trading plan, Class B Common Stock, Class A Common Stock, amended and restated certificate of incorporation

4 terms

Rule 10b5-1 trading plan regulatory

"This sale ... 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.

Class B Common Stock financial

"Each share of Class B Common Stock held by the Reporting Person"

A class B common stock is one of multiple types of a company’s ordinary shares that carries specific rights—often different voting power or dividend priority—compared with other classes. For investors it matters because those differences affect how much influence you have over company decisions, the income you might receive, and how freely the shares trade; think of it like owning a car with different keys: some keys let you start the engine and open the trunk, others only unlock the door.

Class A Common Stock financial

"convert into one share of Class A Common Stock upon the sale"

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.

amended and restated certificate of incorporation regulatory

"described in the Issuer's amended and restated certificate of incorporation"

A company’s amended and restated certificate of incorporation is an updated version of its foundational legal charter that replaces the older document and folds in all changes into one clear copy; it spells out corporate structure, classes of stock, shareholder rights and key governance rules. Investors care because it can change who controls the company, how votes are counted, what claims shareholders have on assets or dividends, and can introduce or remove protections against takeovers—like updating a house title after a major renovation to show who owns what and under what rules.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transactions did Rubrik (RBRK) director Yvonne Wassenaar report?

Yvonne Wassenaar reported converting 513 Class B shares into 513 Class A shares and then selling 721 Class A shares at $89.52 per share on September 3, 2026. The conversion and sale were disclosed in a Form 4 filing.

How many Rubrik (RBRK) shares did Yvonne Wassenaar sell and at what price?

She sold 721 shares of Class A Common Stock at a price of $89.52 per share on September 3, 2026. This sale was reported as a transaction in Class A Common Stock.

Was the Rubrik (RBRK) insider sale made under a Rule 10b5-1 plan?

Yes. The filing states the sale was effected pursuant to a Rule 10b5-1 trading plan that was adopted on December 15, 2025, indicating the sale followed a pre-arranged trading schedule.

What conversion of Rubrik (RBRK) shares did Yvonne Wassenaar report?

She reported a conversion of 513 shares of Class B Common Stock into 513 shares of Class A Common Stock on September 3, 2026. The conversion price per share was reported as $0.00.

How many Rubrik (RBRK) Class B shares does Yvonne Wassenaar hold after the reported conversion?

After the reported conversion, she held 32,603 shares of Class B Common Stock directly. This figure is stated as the total Class B shares following the derivative conversion transaction.

How do Rubrik (RBRK) Class B shares convert into Class A shares?

The filing states each Class B share automatically converts into one Class A share upon sale or transfer, subject to certain exceptions, and can also be converted at any time at the holder’s option into one Class A share. Class B has no expiration date.

AI-generated analysis. How Rhea-AI works. Not financial advice.

Form 4 Insider Transactions: What Each Field Means →

See more from StockTitan in Google Search and AI answers. Adds StockTitan as a preferred source · opens Google

Add on Google Not now

Available on EDGAR 09/03/2026 - 09:06 PM EDT Accepted by SEC EDGAR 09/03/2026 - 09:05 PM EDT Learn about SEC filing dates

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).

X

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)
09/03/2026

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)
			Code	V	Amount	(A) or (D)	Price
Class A Common Stock	09/03/2026		C		513	A	$0	4,430	D
Class A Common Stock	09/03/2026		S(1)		721	D	$89.52	3,709	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)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Class B Common Stock	(2)	09/03/2026		C			513	(2)	(2)	Class A Common Stock	513	$0	32,603	D

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.

2. Each share of Class B Common Stock held by the Reporting Person will automatically convert into one share of Class A Common Stock upon the sale or transfer of such share of Class B Common Stock, subject to certain exceptions, and in certain other circumstances described in the Issuer's amended and restated certificate of incorporation. Each share of Class B Common Stock will also be convertible at any time at the option of the Reporting Person into one share of Class A Common Stock and has no expiration date.

	/s/ Anne-Kathrin Lalendran, Attorney-in-Fact	09/03/2026
	** 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)