Rubrik director plans sale of 2,163 shares

Rubrik director Yvonne Wassenaar filed a Rule 144 notice to sell 2,163 common shares and disclosed recent 10b5-1 plan sales.

Rhea-AI Filing Summary

Rubrik, Inc. (RBRK) is the issuer for which director Yvonne Wassenaar has filed a notice of proposed sale of common stock under Rule 144. The notice lists 2,163 shares of common stock to be sold, associated with Restricted Stock Units and to be handled through Morgan Stanley Smith Barney LLC Executive Financial Services.

The filing also reports prior Rule 10b5-1 plan sales of Rubrik common stock by Yvonne Wassenaar over the past three months, with three separate transactions in June, July, and August 2026, each disclosing the number of shares sold and aggregate sale proceeds.

Key Figures

Planned shares to be sold: 2,163 shares of common stock June 23, 2026 10b5-1 sale: 676 shares; $50,700.00 aggregate proceeds July 1, 2026 10b5-1 sale: 721 shares; $58,811.97 aggregate proceeds +1 more

4 metrics

Planned shares to be sold 2,163 shares of common stock Proposed sale under Rule 144 for the account of Yvonne Wassenaar

June 23, 2026 10b5-1 sale 676 shares; $50,700.00 aggregate proceeds Rule 10b5-1 sale of Rubrik common stock by Yvonne Wassenaar

July 1, 2026 10b5-1 sale 721 shares; $58,811.97 aggregate proceeds Rule 10b5-1 sale of Rubrik common stock by Yvonne Wassenaar

August 3, 2026 10b5-1 sale 721 shares; $54,075.00 aggregate proceeds Rule 10b5-1 sale of Rubrik common stock by Yvonne Wassenaar

Key Terms

Rule 144, Restricted Stock Units, 10b5-1, Form 144

4 terms

Rule 144 regulatory

"See the definition of "person" in paragraph (a) of Rule 144."

Rule 144 is a U.S. securities regulation that sets conditions under which restricted or insider-held shares can be legally resold to the public, such as required holding periods, availability of public information, limits on how much can be sold at once, and certain filing requirements. For investors it matters because it determines when previously locked-up shares can enter the market — like a release valve that can increase supply, affect share price, and signal insider intent.

Restricted Stock Units financial

"Common | 12/17/2024 | Restricted Stock Units | Issuer"

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

10b5-1 regulatory

"10b5-1 Sales for YVONNE WASSENAAR 3495 DEER CREEK ROAD"

A 10b5-1 plan is a pre-set schedule that lets company insiders buy or sell shares according to written instructions made when they do not possess material, nonpublic information. Think of it as a timed automatic payment for stock trades: it helps insiders avoid accusations of trading on secret information and gives outside investors a clearer signal about whether sales are routine or potentially informative about the company’s prospects.

Form 144 regulatory

"144: Filer Information"

Form 144 is a document that investors must file with the government when they plan to sell a large number of shares of a company's stock. It helps ensure transparency so everyone knows how many shares are being sold and when, which can impact the stock's price.

FAQ

What does the Form 144 filing disclose about Rubrik, Inc. (RBRK)?

The Form 144 discloses that a Rubrik, Inc. director, Yvonne Wassenaar, has filed a notice of proposed sale of 2,163 shares of Rubrik common stock under Rule 144, and it lists recent sales of Rubrik shares made under a Rule 10b5-1 trading plan.

How many Rubrik (RBRK) shares does Yvonne Wassenaar plan to sell under this Form 144?

The notice states that Yvonne Wassenaar plans to sell 2,163 shares of Rubrik common stock under Rule 144. These shares are related to Restricted Stock Units and are to be sold through Morgan Stanley Smith Barney LLC Executive Financial Services.

What recent 10b5-1 plan sales by Yvonne Wassenaar in Rubrik (RBRK) stock are reported?

The filing reports three Rule 10b5-1 sales of Rubrik common stock by Yvonne Wassenaar: 676 shares on June 23, 2026, 721 shares on July 1, 2026, and 721 shares on August 3, 2026, each transaction listing aggregate dollar proceeds.

What type of securities are being sold in this Rubrik (RBRK) Form 144?

The Form 144 covers Rubrik, Inc. common stock, with the planned sale of 2,163 shares associated with Restricted Stock Units. The securities are identified as common stock of Rubrik, Inc., listed on the NYSE.

Which broker is handling the proposed Rubrik (RBRK) share sale for Yvonne Wassenaar?

The proposed sale of 2,163 Rubrik common shares for Yvonne Wassenaar is listed as being handled by Morgan Stanley Smith Barney LLC Executive Financial Services, located at 1 New York Plaza, 8th Floor, New York, NY 10004.

What is the relationship of the seller to Rubrik, Inc. (RBRK)?

The notice identifies Yvonne Wassenaar as a Director of Rubrik, Inc. The Form 144 is filed for the account of this director, with details on the common stock to be sold and prior 10b5-1 sales reported.

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

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Available on EDGAR 09/03/2026 - 05:50 PM Accepted by SEC EDGAR 09/03/2026 - 04:39 PM Learn about SEC filing dates

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK	0001707744
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	RUBRIK, INC.
SEC File Number	001-42028
Address of Issuer	3495 DEER CREEK ROAD Palo Alto CALIFORNIA 94304
Phone	8444782745
Name of Person for Whose Account the Securities are To Be Sold	YVONNE WASSENAAR
See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.
Relationship to Issuer	Director

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common	Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza 8th Floor New York NY 10004	2163	188570.34	167367143	09/03/2026	NYSE

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common	12/17/2024	Restricted Stock Units	Issuer			2163	12/17/2024	N/A

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
10b5-1 Sales for YVONNE WASSENAAR 3495 DEER CREEK ROAD Palo Alto CA 94304	Common	08/03/2026	721	54075.00
10b5-1 Sales for YVONNE WASSENAAR 3495 DEER CREEK ROAD Palo Alto CA 94304	Common	07/01/2026	721	58811.97
10b5-1 Sales for YVONNE WASSENAAR 3495 DEER CREEK ROAD Palo Alto CA 94304	Common	06/23/2026	676	50700.00

144: Remarks and Signature

Remarks
Date of Notice	09/03/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	12/15/2025
ATTENTION:
The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.
Signature	/s/ Yvonne Wassenaar
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)