Rubrik
RBRK on NYSE. Rubrik sells data security software to organizations. Market value $13.3bn.
Price checks use the past 12 months to July 2026. Quality checks use five annual reports, the latest for the year to January 2026.
We can't read total debt from the filing, so debt is left out.
Should I look at this?
Not a fit for our list right now
Why it could be worth it
What to watch out for
See Technology stocks that passed both tests
This is not advice. Check the numbers below.
For every $100 of what the whole company costs, it produced $1.16 of spare cash in the past 12 months. A savings account pays about $4.
The filings do not give us enough to work this out.
The filings do not give us enough to work this out.
Quality score: not known. Price score: 6 of 100. Our list needs 70 on quality and 60 on price.
$125.80 a share, 198% above its 1-year low
Over the past year the price has ranged from $42.25 to $127.90.
Pays no dividend
Prices from Tuesday’s close (6 October).
Five years of cash, in billions
| Revenue | ||
| Revenue | $887m | $1.3bn |
| Operating margin | ||
| Operating margin | -127.9% | -26.2% |
| Debt to equity | ||
| Debt to equity | n/a | n/a |
| Shares outstanding | ||
| Shares outstanding | 0.15bn | 0.20bn |
Health checks
- Free cash flow positive2 of 2 years
- Accounting looks honest (Beneish)Not enough data
- Financial strength (Piotroski)4 of 7 checks we could run
- Profit backed by cash (accruals)No
- DebtUnknown
- Revenue growth, five yearsUnknown
- Buying back its own sharesNo, 27% more shares since 2025
The quarter to July 2026
How the business did, compared with the same quarter a year earlier.
- Sales: $427 million last quarter, up 38% on a year ago.
- A loss of $62 million, compared with a loss of $96 million a year ago.
- It loses 18 cents on each $1 of sales, compared with 40 cents a year earlier.
- Spare cash over the past 12 months: $286 million, up from $182 million.
- 6% more shares than a year ago. Each share owns a bit less of the company.
- Sales grew on a year ago in each of the last 4 quarters.
| Quarter to | Amount |
|---|---|
| October 2024 | $236m |
| January 2025 | $258m |
| April 2025 | $278m |
| July 2025 | $310m |
| October 2025 | $350m |
| January 2026 | $378m |
| April 2026 | $387m |
| July 2026 | $427m |
| Quarter to | Amount |
|---|---|
| October 2024 | -$131m |
| January 2025 | -$115m |
| April 2025 | -$102m |
| July 2025 | -$96m |
| October 2025 | -$64m |
| January 2026 | -$87m |
| April 2026 | -$42m |
| July 2026 | -$62m |
From the company's quarterly reports to the SEC.
Dates
- Next results (estimated)
- n/a
- Last annual report (10-K)
- 19 March 2026
- Next quarterly (estimated, 10-Q)
- 1 December 2026
Who owns it
2 long-term investors we follow own it, up from 1 last quarter. 573 funds in all.
| Fund | Value | Share of that fund | Change |
|---|---|---|---|
| Gotham Asset ManagementJoel Greenblatt | $9m | <0.1% | Added |
| Polen CapitalDan Davidowitz | $497,816 | <0.1% | New |
Largest holders overall
- BlackRock$802mAdded
- AQR Capital Management$780mAdded
- FMR$739mAdded
- Vanguard Portfolio Management$666mAdded
- Vanguard Capital Management$553mAdded
- First Trust Advisors LP$480mAdded
- Norges Bank$327mNew
- Voya Investment Management$322mAdded
- Geode Capital Management$231mAdded
- State Street$230mAdded
From 13F filings for the quarter ended 30 June 2026.
Big holders and activists
11 investors own more than 5%.
- Arvind NithrakashyapPassive investor11.5%Since 31 December 2024
- Barry EggersPassive investorat least 9.1%−9.0 pts(filed with 2 related holders)Since 30 June 2025
- Bipul SinhaInsider or founder8.9%−1.0 ptsSince 12 September 2025
- AQR Capital Management, LLCPassive investorat least 6.2%(filed with 1 related holder)Since 30 June 2026
- FMR LLCPassive investorat least 5.3%(filed with 1 related holder)Since 31 March 2026
- BlackRock, Inc.Passive investor5.3%Since 31 March 2026
- Vanguard Portfolio ManagementPassive investor5.1%Since 31 March 2026
- Vanguard Capital ManagementPassive investor5.0%Since 30 June 2026
- Greylock XIV GP LLCPassive investorat least 3.9%−5.1 pts(filed with 3 related holders)Since 30 June 2025
- VK Services, LLCPassive investorat least 2.2%(filed with 5 related holders)Since 31 December 2024
- LS SPV Management, LLCPassive investorat least 2.0%−0.8 pts(filed with 9 related holders)Since 30 June 2026
- Norges BankPassive investorSold down below 5%Since 31 December 2024
- The Vanguard GroupPassive investorSold down below 5%Since 13 March 2026
- Lightspeed Venture Partners X, L.P.Passive investorSold down below 5%Since 31 December 2025
- Lightspeed Affiliates X, L.P.Passive investorSold down below 5%Since 31 March 2025
| Holder | Stake | Since | |
|---|---|---|---|
Arvind Nithrakashyap Passive investor | 11.5% | 31 December 2024 | |
Barry Eggers Passive investor | at least 9.1%−9.0 pts (filed with 2 related holders) | 30 June 2025 | |
Bipul Sinha Insider or founder | 8.9%−1.0 pts | 12 September 2025 | |
AQR Capital Management, LLC Passive investor | at least 6.2% (filed with 1 related holder) | 30 June 2026 | |
FMR LLC Passive investor | at least 5.3% (filed with 1 related holder) | 31 March 2026 | |
BlackRock, Inc. Passive investor | 5.3% | 31 March 2026 | |
Vanguard Portfolio Management Passive investor | 5.1% | 31 March 2026 | |
Vanguard Capital Management Passive investor | 5.0% | 30 June 2026 | |
Greylock XIV GP LLC Passive investor | at least 3.9%−5.1 pts (filed with 3 related holders) | 30 June 2025 | |
VK Services, LLC Passive investor | at least 2.2% (filed with 5 related holders) | 31 December 2024 | |
LS SPV Management, LLC Passive investor | at least 2.0%−0.8 pts (filed with 9 related holders) | 30 June 2026 | |
Norges Bank Passive investor | Sold down below 5% | 31 December 2024 | |
The Vanguard Group Passive investor | Sold down below 5% | 13 March 2026 | |
Lightspeed Venture Partners X, L.P. Passive investor | Sold down below 5% | 31 December 2025 | |
Lightspeed Affiliates X, L.P. Passive investor | Sold down below 5% | 31 March 2025 |
From Schedule 13D and 13G filings: anyone owning more than 5% must file one.
What insiders did
In the last 12 months, 1 insider bought $502,220 of shares on the open market. 6 sold $74m, $54m of it under preset trading plans.
- Wassenaar YvonneDirectorSoldunder a preset trading plan
- Date
- 5 October 2026
- Shares
- 721
- Price
- $119.00
- Value
- $85,799
- THOMPSON JOHN WENDELLDirectorSoldunder a preset trading plan
- Date
- 1 October 2026
- Shares
- 13,500
- Price
- $115.69
- Value
- $2m
- Choudary Kiran KumarChief Financial OfficerSoldunder a preset trading plan
- Date
- 17 September 2026
- Shares
- 6,000
- Price
- $107.32
- Value
- $643,922
- Choudary Kiran KumarChief Financial OfficerSoldunder a preset trading plan
- Date
- 15 September 2026
- Shares
- 4,000
- Price
- $101.05
- Value
- $404,186
- Nithrakashyap ArvindChief Technology Officer, DirectorSoldunder a preset trading plan
- Date
- 10 September 2026
- Shares
- 12,820
- Price
- $90.41
- Value
- $1m
- Nithrakashyap ArvindChief Technology Officer, DirectorSoldunder a preset trading plan
- Date
- 9 September 2026
- Shares
- 12,820
- Price
- $90.46
- Value
- $1m
- Nithrakashyap ArvindChief Technology Officer, DirectorSoldunder a preset trading plan
- Date
- 8 September 2026
- Shares
- 12,820
- Price
- $91.33
- Value
- $1m
- Wassenaar YvonneDirectorSoldunder a preset trading plan
- Date
- 3 September 2026
- Shares
- 721
- Price
- $89.52
- Value
- $64,544
- THOMPSON JOHN WENDELLDirectorSoldunder a preset trading plan
- Date
- 1 September 2026
- Shares
- 13,500
- Price
- $89.03
- Value
- $1m
- Choudary Kiran KumarChief Financial OfficerSoldunder a preset trading plan
- Date
- 24 August 2026
- Shares
- 10,000
- Price
- $98.32
- Value
- $983,188
| Date | Who | Did | Shares | Price | Value |
|---|---|---|---|---|---|
| 5 October 2026 | Wassenaar Yvonne Director | Sold under a preset trading plan | 721 | $119.00 | $85,799 |
| 1 October 2026 | THOMPSON JOHN WENDELL Director | Sold under a preset trading plan | 13,500 | $115.69 | $2m |
| 17 September 2026 | Choudary Kiran Kumar Chief Financial Officer | Sold under a preset trading plan | 6,000 | $107.32 | $643,922 |
| 15 September 2026 | Choudary Kiran Kumar Chief Financial Officer | Sold under a preset trading plan | 4,000 | $101.05 | $404,186 |
| 10 September 2026 | Nithrakashyap Arvind Chief Technology Officer, Director | Sold under a preset trading plan | 12,820 | $90.41 | $1m |
| 9 September 2026 | Nithrakashyap Arvind Chief Technology Officer, Director | Sold under a preset trading plan | 12,820 | $90.46 | $1m |
| 8 September 2026 | Nithrakashyap Arvind Chief Technology Officer, Director | Sold under a preset trading plan | 12,820 | $91.33 | $1m |
| 3 September 2026 | Wassenaar Yvonne Director | Sold under a preset trading plan | 721 | $89.52 | $64,544 |
| 1 September 2026 | THOMPSON JOHN WENDELL Director | Sold under a preset trading plan | 13,500 | $89.03 | $1m |
| 24 August 2026 | Choudary Kiran Kumar Chief Financial Officer | Sold under a preset trading plan | 10,000 | $98.32 | $983,188 |
From Form 4 filings: insiders must report trades in their own company's shares within two days.
Warning signs in its filings
Problems the company itself reported to the SEC, in its own words.
None of the serious warning signs we check for were found. 1 thing worth knowing.
We look for five warning signs: doubt it can keep going, weak checks on its own accounts, a notice that its past accounts can't be relied on, a change of auditor, and one customer bringing in a big share of sales. We don't check lawsuits, investigations or debt yet.
We checked the auditor's report, internal controls, restatement notices, auditor changes and big customers in the 10-K filed 19 Mar 2026, plus the 10-Q filed 1 Sep 2026 and 3 later 8-Ks.
One big customer
Worth knowingOne customer brings in a big share of sales: 32% last year. Losing that customer would hurt.
“The following customers individually accounted for 10% or more of total revenue and 10% or more of accounts receivable, net: Revenue | Accounts Receivable, Net Year Ended January 31, | January 31, 2026 | 2025 | 2024 | 2026 | 2025 Partner A | 27% | 29% | 30 | 32% | 33% Partner B | 32% | 34% | 35 | 21% | 20%”
From the 10-K filed 19 March 2026, Item 8. Financial Statements and Notes (table). Read it in the filing
A 10-K is the yearly report every US company files with the SEC. An 8-K is a short notice of a big event.
What could go wrong
- It owes more than it owns on paper (negative equity). Often that's from borrowing to buy back shares.
Whether the price already reflects the risks is what the deep dive is for.
The deep dive
Everything above is arithmetic on public filings. The deep dive reads the last ten years of annual reports, the proxy statements, and the earnings calls, then argues the case the way Buffett, Klarman, and Hohn would, and checks every claim against the source.
- What the business is worth, as a range, and the margin of safety at today’s price
- Prices to start buying, buy, and buy hard
- The three things that would make this a mistake
- Every number footnoted to the filing it came from
Your first deep dive is free.
Not advice. Numbers on this page come from SEC filings and are updated each night; prices are updated again after the US market closes. The five-year figures are rounded.