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  4. [Form 4] Rubrik, Inc. Insider Trading Activity

Rubrik, Inc. (RBRK) CTO trades 38,460 shares in 10b5-1 plan

Filing Impact
(Very High)
Filing Sentiment
(Negative)
Form Type
4

Rhea-AI Filing Summary

Rubrik, Inc. Chief Technology Officer Arvind Nithrakashyap converted Class B into Class A common stock and, between August 3 and 5, 2026, sold 38,460 Class A shares in multiple reported transactions at weighted-average prices including $73.7200 and $84.6100 per share under a Rule 10b5-1 trading plan adopted on October 15, 2025.

He also reports an indirect position of 200,000 shares of Class B Common Stock held through a revocable trust, with each Class B share convertible into one share of Class A Common Stock.

Positive

  • None.

Negative

  • None.

Insights

Analyzing...

Insider Nithrakashyap Arvind
Role Chief Technology Officer
Sold 38,460 shs ($3.05M)
Approx. gross sale proceeds $3.05M
Type Security Shares Price Value
Conversion Class B Common Stock F13 12,820 $0.00 $0.00
Conversion Class A Common Stock 12,820 $0.00 $0.00
Sale Class A Common Stock F1, F9 1,342 $82.08 $110K
Sale Class A Common Stock F1, F10 2,780 $83.17 $231K
Sale Class A Common Stock F1, F11 8,177 $84.10 $688K
Sale Class A Common Stock F1, F12 521 $84.61 $44K
Conversion Class B Common Stock F13 12,820 $0.00 $0.00
Conversion Class A Common Stock 12,820 $0.00 $0.00
Sale Class A Common Stock F1, F4 212 $76.77 $16K
Sale Class A Common Stock F1, F5 1,303 $77.99 $102K
Sale Class A Common Stock F1, F6 2,981 $79.11 $236K
Sale Class A Common Stock F1, F7 3,767 $79.81 $301K
Sale Class A Common Stock F1, F8 4,557 $80.94 $369K
Conversion Class B Common Stock F13 2,502 $0.00 $0.00
Conversion Class A Common Stock 2,502 $0.00 $0.00
Sale Class A Common Stock F1, F2 7,642 $73.72 $563K
Sale Class A Common Stock F1, F3 5,178 $74.52 $386K
holding Class B Common Stock F13, F14 -- -- --
Holdings After Transaction: Class B Common Stock — 10,066,710 shares (Direct); Class A Common Stock — 293,293 shares (Direct); Class B Common Stock — 200,000 shares (Indirect, By Arvind Nithrakashyap, as Trustee of the Nithrakashyap Chatterjee Revocable Trust)
Footnotes (14)
  1. F1. This sale reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan, adopted October 15, 2025.
  2. F2. The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $73.1625 to $74.145 per share, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities Exchange Commission, upon request, full information regarding the number of shares sold at each separated price within the range set forth in this footnote.
  3. F3. The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $74.165 to $74.985 per share, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities Exchange Commission, upon request, full information regarding the number of shares sold at each separated price within the range set forth in this footnote.
  4. F4. The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $76.47 to $77.32 per share, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities Exchange Commission, upon request, full information regarding the number of shares sold at each separated price within the range set forth in this footnote.
  5. F5. The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $77.50 to $78.40 per share, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities Exchange Commission, upon request, full information regarding the number of shares sold at each separated price within the range set forth in this footnote.
  6. F6. The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $78.47 to $79.455 per share, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities Exchange Commission, upon request, full information regarding the number of shares sold at each separated price within the range set forth in this footnote.
  7. F7. The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $79.47 to $80.455 per share, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities Exchange Commission, upon request, full information regarding the number of shares sold at each separated price within the range set forth in this footnote.
  8. F8. The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $80.475 to $81.34 per share, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities Exchange Commission, upon request, full information regarding the number of shares sold at each separated price within the range set forth in this footnote.
  9. F9. The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $81.535 to $82.48 per share, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities Exchange Commission, upon request, full information regarding the number of shares sold at each separated price within the range set forth in this footnote.
  10. F10. The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $82.5375 to $83.525 per share, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities Exchange Commission, upon request, full information regarding the number of shares sold at each separated price within the range set forth in this footnote.
  11. F11. The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $83.55 to $84.51 per share, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities Exchange Commission, upon request, full information regarding the number of shares sold at each separated price within the range set forth in this footnote.
  12. F12. The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $84.535 to $84.665 per share, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities Exchange Commission, upon request, full information regarding the number of shares sold at each separated price within the range set forth in this footnote.
  13. F13. 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 is also convertible at any time at the option of the Reporting Person into one share of Class A Common Stock and has no expiration date.
  14. F14. The shares are held of record by Arvind Nithrakashyap, as Trustee of the Nithrakashyap/Chatterjee Revocable Trust, for which the Reporting Person serves as trustee and shares voting and dispositive power with his spouse.
Class A shares sold 38460 shares Aggregate shares of Class A Common Stock sold August 3–5, 2026
Shares converted from Class B to Class A 28142 shares Total Class A shares acquired via conversion of Class B Common Stock August 3–5, 2026
Rule 10b5-1 plan adoption date October 15, 2025 Adoption date of the trading plan governing the reported sales
Indirect Class B holdings via trust 200000 shares Class B Common Stock held through a revocable trust, convertible 1-for-1 into Class A
Sample sale price (August 3, 2026) $73.7200 per share Weighted-average price for a 7642-share sale of Class A Common Stock
Highest reported weighted-average sale price $84.6100 per share Weighted-average price for a 521-share sale of Class A Common Stock on August 5, 2026
Rule 10b5-1 trading plan regulatory
"This 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.
weighted average price financial
"The reported price in Column 4 is a weighted average price"
Weighted average price is the average price of a security where each trade or component is counted according to its size, so bigger trades pull the average more than smaller ones. Think of it like calculating the average cost of a grocery haul where items you bought more of have greater influence on the final per-item cost. Investors use it to understand the true average price paid or received, judge execution quality, and compare trading performance against market movement.
Class B Common Stock financial
"Each share of Class B Common Stock held by the Reporting Person will automatically convert"
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.
derivative security financial
"transaction_code_description: Conversion of derivative security"
A derivative security is a financial contract whose value comes from the price or performance of something else, such as a stock, bond, commodity, or market index. For investors it acts like an insurance policy or a wager: it can be used to protect against losses, lock in prices, or amplify gains and losses, so it can change a portfolio’s risk and potential return without owning the underlying asset directly.
dispositive power regulatory
"shares voting and dispositive power with his spouse"
Dispositive power is the authority to decide the final outcome of an asset, legal claim, contract, or corporate action — in effect the power to dispose of or resolve something. For investors it matters because whoever holds that authority can determine who gets paid, who controls an asset or vote, and how risks and returns are allocated; think of it like holding the key that lets you lock in the winner or loser in a deal.

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

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FAQ

What did Rubrik (RBRK) CTO Arvind Nithrakashyap report selling in this Form 4?
Arvind Nithrakashyap reported selling a total of 38,460 shares of Rubrik Class A Common Stock. These sales occurred over August 3–5, 2026 in multiple reported transactions at weighted-average prices, as disclosed in the Form 4 and related footnotes.

Over what dates and at what prices did the RBRK insider trades occur?
The reported trades occurred on August 3, 4 and 5, 2026. Individual sales used weighted-average prices, including $73.7200 and $84.6100 per share, with each sale executed through multiple transactions within the price ranges described in the accompanying footnotes.

Were Rubrik (RBRK) CTO Arvind Nithrakashyap’s stock sales under a Rule 10b5-1 plan?
Yes. A footnote states each sale was effected pursuant to a Rule 10b5-1 trading plan adopted on October 15, 2025, and the Rule 10b5-1 checkbox is marked, indicating the transactions were executed under a pre-established trading arrangement.

How many Rubrik (RBRK) shares did the CTO convert from Class B to Class A?
Across the reported dates, Nithrakashyap converted derivative holdings of Class B Common Stock into a total of 28,142 shares of Class A Common Stock, with each Class B share converting into one Class A share and no exercise price reported.

What ongoing Rubrik (RBRK) holdings does the CTO report through a trust?
He reports an indirect holding of 200,000 shares of Class B Common Stock through a revocable trust. Each Class B share is convertible into one Class A share, and he shares voting and dispositive power over these shares with his spouse.

Are the reported Rubrik (RBRK) insider sales open-market or private transactions?
Each sale is coded as a disposition of Class A Common Stock with the description "Sale in open market or private transaction". The Form 4 does not distinguish further, but notes that prices shown are weighted averages for multiple underlying trades.
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*
Nithrakashyap Arvind
(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
XOfficer (give title below)Other (specify below)
Chief Technology Officer
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 Stock08/03/2026C2,502A$0306,113D
Class A Common Stock08/03/2026S(1)7,642D$73.72(2)298,471D
Class A Common Stock08/03/2026S(1)5,178D$74.52(3)293,293D
Class A Common Stock08/04/2026C12,820A$0306,113D
Class A Common Stock08/04/2026S(1)212D$76.77(4)305,901D
Class A Common Stock08/04/2026S(1)1,303D$77.99(5)304,598D
Class A Common Stock08/04/2026S(1)2,981D$79.11(6)301,617D
Class A Common Stock08/04/2026S(1)3,767D$79.81(7)297,850D
Class A Common Stock08/04/2026S(1)4,557D$80.94(8)293,293D
Class A Common Stock08/05/2026C12,820A$0306,113D
Class A Common Stock08/05/2026S(1)1,342D$82.08(9)304,771D
Class A Common Stock08/05/2026S(1)2,780D$83.17(10)301,991D
Class A Common Stock08/05/2026S(1)8,177D$84.1(11)293,814D
Class A Common Stock08/05/2026S(1)521D$84.61(12)293,293D
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
Class B Common Stock(13)08/03/2026C2,502 (13) (13)Class A Common Stock2,502$010,092,350D
Class B Common Stock(13)08/04/2026C12,820 (13) (13)Class A Common Stock12,820$010,079,530D
Class B Common Stock(13)08/05/2026C12,820 (13) (13)Class A Common Stock12,820$010,066,710D
Class B Common Stock(13) (13) (13)Class A Common Stock200,000200,000IBy Arvind Nithrakashyap, as Trustee of the Nithrakashyap Chatterjee Revocable Trust(14)
Explanation of Responses:
1. This sale reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan, adopted October 15, 2025.
2. The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $73.1625 to $74.145 per share, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities Exchange Commission, upon request, full information regarding the number of shares sold at each separated price within the range set forth in this footnote.
3. The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $74.165 to $74.985 per share, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities Exchange Commission, upon request, full information regarding the number of shares sold at each separated price within the range set forth in this footnote.
4. The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $76.47 to $77.32 per share, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities Exchange Commission, upon request, full information regarding the number of shares sold at each separated price within the range set forth in this footnote.
5. The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $77.50 to $78.40 per share, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities Exchange Commission, upon request, full information regarding the number of shares sold at each separated price within the range set forth in this footnote.
6. The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $78.47 to $79.455 per share, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities Exchange Commission, upon request, full information regarding the number of shares sold at each separated price within the range set forth in this footnote.
7. The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $79.47 to $80.455 per share, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities Exchange Commission, upon request, full information regarding the number of shares sold at each separated price within the range set forth in this footnote.
8. The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $80.475 to $81.34 per share, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities Exchange Commission, upon request, full information regarding the number of shares sold at each separated price within the range set forth in this footnote.
9. The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $81.535 to $82.48 per share, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities Exchange Commission, upon request, full information regarding the number of shares sold at each separated price within the range set forth in this footnote.
10. The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $82.5375 to $83.525 per share, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities Exchange Commission, upon request, full information regarding the number of shares sold at each separated price within the range set forth in this footnote.
11. The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $83.55 to $84.51 per share, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities Exchange Commission, upon request, full information regarding the number of shares sold at each separated price within the range set forth in this footnote.
12. The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $84.535 to $84.665 per share, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities Exchange Commission, upon request, full information regarding the number of shares sold at each separated price within the range set forth in this footnote.
13. 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 is also convertible at any time at the option of the Reporting Person into one share of Class A Common Stock and has no expiration date.
14. The shares are held of record by Arvind Nithrakashyap, as Trustee of the Nithrakashyap/Chatterjee Revocable Trust, for which the Reporting Person serves as trustee and shares voting and dispositive power with his spouse.
/s/ Milson Yu, Attorney-in-Fact08/05/2026
** 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