STOCK TITAN
  1. Home
  2. Sec-filings
  3. RBRK
  4. [Form 4] Rubrik, Inc. Insider Trading Activity

Rubrik, Inc. (RBRK) director sells 721 shares under Rule 10b5-1 plan

Filing Impact
(Neutral)
Filing Sentiment
(Negative)
Form Type
4

Rhea-AI Filing Summary

Rubrik, Inc. director Yvonne Wassenaar sold 721 shares of Class A Common Stock on August 3, 2026 at $75.00 per share in an open-market or private transaction. After the sale, she directly owned 3,917 shares. The trade was executed under a Rule 10b5-1 trading plan adopted December 15, 2025.

Positive

  • None.

Negative

  • None.
Insider Wassenaar Yvonne
Role Director
Sold 721 shs ($54K)
Type Security Shares Price Value
Sale Class A Common Stock F1 721 $75.00 $54K
Holdings After Transaction: Class A Common Stock — 3,917 shares (Direct)
Footnotes (1)
  1. F1. This sale reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan, adopted December 15, 2025.
Shares sold 721 shares Class A Common Stock sale on August 3, 2026
Sale price $75.0000 per share Price for 721 shares of Class A Common Stock
Shares owned after sale 3917 shares Direct holdings following the August 3, 2026 transaction
Net shares sold 721 shares netBuySellShares across reported transactions in this Form 4
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 A Common Stock financial
"Security title reported as 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.
open market or private transaction financial
"Transaction code description: Sale in open market or private transaction"

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

See more from StockTitan in Google Search and AI answers. Adds StockTitan as a preferred source · opens Google
Add on Google
Form 4 Insider Transactions: What Each Field Means →

FAQ

What insider transaction did Rubrik (RBRK) report for director Yvonne Wassenaar?
Rubrik reported that director Yvonne Wassenaar sold 721 shares of Class A Common Stock on August 3, 2026 at $75.00 per share in an open-market or private transaction, leaving her with 3,917 directly owned shares.

How many Rubrik (RBRK) shares does Yvonne Wassenaar hold after this Form 4 sale?
Following the transaction, Yvonne Wassenaar directly owned 3,917 shares of Rubrik Class A Common Stock. This post-transaction balance reflects her holdings after selling 721 shares on August 3, 2026 at $75.00 per share.

At what price did Yvonne Wassenaar sell her Rubrik (RBRK) shares?
Yvonne Wassenaar’s reported sale of Rubrik shares was executed at $75.00 per share. The transaction covered 721 shares of Class A Common Stock on August 3, 2026, in an open-market or private transaction.

Was Yvonne Wassenaar’s Rubrik (RBRK) stock sale under a Rule 10b5-1 plan?
Yes. The filing states the sale was effected pursuant to a Rule 10b5-1 trading plan adopted on December 15, 2025. The Form 4 also checks the Rule 10b5-1 plan box, indicating use of a pre-arranged trading plan.

What type of Rubrik (RBRK) security did Yvonne Wassenaar sell in this Form 4?
The reported transaction involved Class A Common Stock of Rubrik, Inc. Wassenaar sold 721 shares at $75.00 per share in a sale described as an open-market or private transaction, leaving her with 3,917 directly owned shares afterward.
SEC Form 4
FORM 4UNITED 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)
XDirector10% Owner
Officer (give title below)Other (specify below)
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
08/03/2026		6. Individual or Joint/Group Filing (Check Applicable Line)
XForm 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)
CodeVAmount(A) or (D)Price
Class A Common Stock08/03/2026S(1)721D$753,917D
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)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
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/ Milson Yu, Attorney-in-Fact08/04/2026
** Signature of Reporting PersonDate
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