Director adds 10,638 Rubrik (NYSE: RBRK) shares at $47.21

Rhea-AI Filing Summary

Rubrik director Mark D. McLaughlin bought 10,638 shares of Class A Common Stock in an open-market purchase on March 30, 2026 at a weighted average price of $47.21 per share. Following this purchase, he directly owns 13,639 shares. The filing notes the shares were acquired in multiple trades at prices ranging from $47.03 to $47.42 per share.

Insider Trade Summary

Net Buyer: 10,638 shares ($502,220)

Net Buy 1 txn

Insider MCLAUGHLIN MARK D

Role Director

Bought 10,638 shs ($502K)

Type	Security	Shares	Price	Value
Purchase	Class A Common Stock	10,638	$47.21	$502K

Holdings After Transaction: Class A Common Stock — 13,639 shares (Direct)

Footnotes (1)

1. [object Object]

Key Figures

Shares purchased: 10,638 shares Weighted average price: $47.21 per share Price range: $47.03–$47.42 per share +2 more

5 metrics

Shares purchased 10,638 shares Open-market buy on March 30, 2026

Weighted average price $47.21 per share Price for the 10,638 purchased shares

Price range $47.03–$47.42 per share Range of individual trade prices in the purchase

Total holdings after transaction 13,639 shares Direct ownership following the reported purchase

Net buy shares 10,638 shares Net change in position from this filing

Key Terms

Class A Common Stock, open-market purchase, weighted average price, Form 4

4 terms

Class A Common Stock financial

"The insider purchased 10,638 shares of 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 purchase financial

"The transaction is described as an open-market purchase"

An open-market purchase is when an investor or a company buys shares on a public stock exchange at the going market price, rather than through a private deal. It matters to investors because these purchases change how many shares are available, can push the stock price up or signal confidence from large buyers, and often affect per-share metrics like earnings—think of it like someone buying lots of apples off a grocery shelf, reducing supply and potentially raising the price.

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.

Form 4 regulatory

"The Form 4 footnote explains that the reported $47.21 price is a weighted average"

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.

Form 4 Insider Transactions: What Each Field Means →

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^*

MCLAUGHLIN MARK D

(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)
03/30/2026

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	03/30/2026		P		10,638	A	$47.21(1)	13,639	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

Explanation of Responses:

1. The reported price in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $47.03 to $47.42 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 purchased at each separated price within the range set forth in this footnote.

	/s/ Larry Guo, Attorney-in-Fact	04/01/2026
	** 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)

FAQ

What insider transaction did Rubrik (RBRK) report for Mark D. McLaughlin?

Rubrik reported that director Mark D. McLaughlin purchased 10,638 shares of Class A Common Stock in an open-market transaction. The weighted average purchase price was $47.21 per share, reflecting multiple trades within a narrow intraday price range.

At what price did Rubrik (RBRK) director Mark D. McLaughlin buy shares?

He bought 10,638 Rubrik Class A shares at a weighted average price of $47.21. According to the filing footnote, individual trade prices ranged from $47.03 to $47.42 per share, all on the same transaction date.

How many Rubrik (RBRK) shares does Mark D. McLaughlin own after this trade?

After the reported open-market purchase, Mark D. McLaughlin directly owns 13,639 shares of Rubrik Class A Common Stock. This total includes the newly acquired 10,638 shares reported in the Form 4 filing for the March 30, 2026 transaction.

Was the Rubrik (RBRK) insider transaction an open-market purchase or another type?

The filing classifies the transaction as an open-market purchase of Class A Common Stock. It is coded as a “P” transaction, described as a purchase in an open market or private transaction, with no derivative securities reported alongside it.

Does the Rubrik (RBRK) filing disclose a price range for the insider share purchases?

Yes. The Form 4 footnote explains that the reported $47.21 price is a weighted average. Individual trades occurred at share prices between $47.03 and $47.42, and the reporting person offers to provide detailed trade breakdowns upon request.