Rubrik (RBRK): Lightspeed funds report 3.5% common stock stake in 13G/A
Rhea-AI Filing Summary
Rubrik, Inc. received an amended institutional ownership report from several Lightspeed Venture Partners funds and related entities, listing them as reporting persons. Collectively, these entities beneficially own 7,144,060 shares of Class B common stock of Rubrik as of June 30, 2026.
This position represents 3.5% of Rubrik’s total common stock and 4.2% of the Class A common stock, calculated assuming full conversion of the Class B shares. The percentages are based on 208,209,919 shares of common stock outstanding as of May 31, 2026, consisting of 163,338,116 Class A shares and 44,871,803 Class B shares, adjusted for the issuance of 2,381,353 Class A shares upon conversions by the reporting holders. The Lightspeed entities report shared, but not sole, voting and dispositive power over their Rubrik shares and state that they beneficially own 5% or less of each relevant class.
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Key Figures
Lightspeed Class B holdings: 7,144,060 shares
Ownership of common stock: 3.5%
Ownership of Class A stock: 4.2%
+4 more
7 metrics
Lightspeed Class B holdings
7,144,060 shares
Aggregate Class B common stock beneficially owned by reporting persons as of June 30, 2026
Ownership of common stock
3.5%
Collective percentage of Rubrik common stock beneficially owned by reporting persons
Ownership of Class A stock
4.2%
Collective percentage of Rubrik Class A common stock on an as-converted basis
Total common shares outstanding
208,209,919 shares
Rubrik common stock outstanding as of May 31, 2026
Class A shares outstanding
163,338,116 shares
Rubrik Class A common stock outstanding as of May 31, 2026
Class B shares outstanding
44,871,803 shares
Rubrik Class B common stock outstanding as of May 31, 2026
New Class A from conversions
2,381,353 shares
Class A shares issued after May 31, 2026 upon conversion of Class B by reporting persons
Key Terms
beneficially own, Class B common stock, shared dispositive power, percent of class, +1 more
5 terms
beneficially own financial
"Collectively, the Reporting Persons beneficially own an aggregate of 7,144,060 shares"
Beneficially own means having the economic rights and risks of a security—such as the right to receive dividends, sell the shares, or profit from price changes—whether or not your name appears on the official share register. Think of it like renting a car: you use it and reap the benefits even if the title lists someone else. Investors care because beneficial ownership determines who truly controls value, must be disclosed under securities rules, and can signal potential influence or trading activity that affects a stock’s price.
Class B common stock financial
"The Reporting Persons' ownership consists of 7,144,060 shares of Class B common stock"
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.
percent of class financial
"Percent of class: Row 11 of each Reporting Person's cover page"
Percent of class is the portion of a specific category of securities—such as a company’s common shares, preferred shares, or a bond series—that takes part in or approves a corporate action (vote, consent, tender, etc.). Investors watch this number because it reveals how much support or opposition exists within that particular shareholder group; like counting how many members of a club back a proposal, it can determine whether a plan passes or how influence is distributed.
Ownership of 5 percent or less of a class financial
"Item 5. | Ownership of 5 Percent or Less of a Class."
FAQ
What stake in Rubrik (RBRK) do the Lightspeed funds report in this Schedule 13G/A?
The Lightspeed-affiliated funds collectively beneficially own 7,144,060 shares of Rubrik Class B common stock. This represents 3.5% of Rubrik’s total common stock and 4.2% of the Class A common stock on an as-converted basis.
What portion of Rubrik’s Class A common stock do the Lightspeed entities effectively hold?
Assuming full conversion of their Class B holdings, the Lightspeed entities collectively beneficially own 4.2% of Rubrik’s Class A common stock. The calculation also reflects 2,381,353 new Class A shares issued after May 31, 2026 from conversions.
Are the Lightspeed entities a group for Rubrik (RBRK) ownership reporting purposes?
The filing states the Lightspeed entities, referred to as the “Reporting Persons,” expressly disclaim status as a “group” for this amendment. They nonetheless jointly report their 7,144,060 Class B Rubrik shares and related ownership percentages.
Why does the Rubrik (RBRK) Schedule 13G/A mention 5 percent or less ownership?
The report notes ownership of 5 percent or less of a class under the relevant item. Collectively, the reporting Lightspeed entities hold 3.5% of Rubrik’s common stock, so they fall below the 5% threshold while still providing updated beneficial ownership details.
AI-generated analysis. How Rhea-AI works. Not financial advice.
