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RBRK in the 13F filings

Rubrik Inc. · CUSIP 781154109

Sector · Software and IT servicesTheme · Cloud and enterprise software· L3VLUP-definedTheme · Prepackaged software
Quarter
Q3 2026 · early filersQ2 2026Q1 2026Q4 2025Q3 2025Q2 2025Q1 2025Q4 2024Q3 2024Q2 2024
Quarter end
30 Sep 2025
the date the book describes
Filed
27 Oct 2026
latest of these filings; the earliest 12 Nov 2025
Managers listing it
18
at least, of 95 tracked, among listed positions
Comparable managers
95
filed both Q2 2025 and Q3 2025; 12 listed it in both
Shares listed
11,089,703
combined, among listed positions
Reported value
$912m
combined, at the quarter end

Among the 95 comparable managers: 8 buyers (opened or added shares) and 10 sellers (trimmed or exited), at least, among listed positions. Their net change in shares is not known from listed positions, because at least one of them lists it in only one of the two quarters.

Managers listing RBRK in Q3 2025

Share of 13F value is the position’s reported value over everything the manager reported that quarter. The share change is against Q2 2025, and only where both filings list the position. A rise in value with no rise in shares is the price, not buying.

18 of 18 holders

ActionFiling
Citadel Advisors LLC2,679,219$220munder 0.1%Addedn.a.14 Nov 2025 (the filing on sec.gov)
AQR Capital Management LLC1,189,403$98m0.06%Newnew14 Nov 2025 (the filing on sec.gov)
D. E. Shaw & Co.1,092,093$90m0.05%Trimmed-3,230,84914 Nov 2025 (the filing on sec.gov)
Renaissance Technologies LLC807,700$66m0.09%Trimmed-410,30013 Nov 2025 (the filing on sec.gov)
Squarepoint Ops LLC668,440$55m0.06%Addedn.a.14 Nov 2025 (the filing on sec.gov)
Man Group PLC634,917$52m0.09%Trimmed-230,59114 Nov 2025 (the filing on sec.gov)
Neuberger Berman Group LLC589,208$48munder 0.1%Addedn.a.27 Oct 2026 (the filing on sec.gov)
Acadian Asset Management LLC556,375$46m0.08%Trimmed-998,87713 Nov 2025 (the filing on sec.gov)
Holocene Advisors LP525,000$43m0.10%Held014 Nov 2025 (the filing on sec.gov)
Voloridge Investment Management LLC502,004$41m0.14%Trimmed-1,276,20014 Nov 2025 (the filing on sec.gov)
Marshall Wace LLP403,017$33munder 0.1%Added+92,82013 Nov 2025 (the filing on sec.gov)
Hudson Bay Capital Management LP359,000$30m0.10%Trimmed-39,00015 Dec 2025 (the filing on sec.gov)
ARK Investment Management LLC319,112$26m0.16%Added+55,50012 Nov 2025 (the filing on sec.gov)
Point72 Asset Management LP314,352$26munder 0.1%Addedn.a.14 Nov 2025 (the filing on sec.gov)
Freestone Grove Partners LP243,730$20m0.15%Held014 Nov 2025 (the filing on sec.gov)
Quantbot Technologies LP156,552$13m0.35%Trimmed-42,47312 Nov 2025 (the filing on sec.gov)
PDT Partners LLC46,583$3.8m0.24%Trimmed-21,66617 Nov 2025 (the filing on sec.gov)
Polen Capital Management LLC2,998$247kunder 0.1%Newnew12 Nov 2025 (the filing on sec.gov)

Largest increases and reductions, by shares

Q2 2025 to Q3 2025, among managers that listed it in both quarters or opened it.

Increases

Reductions

New positions and exits

At least these many: a manager is shown exiting only where its own filing shows the position gone.

New (2)

Exited (2)

Ownership over time

Every quarter on file. A quarter-end value moves with the price as well as with the shares held; buyers and sellers count comparable managers, by shares.
8 in Q3 2024 to 13 in Q2 2026

Tracked managers listing it, at least.

05101520Q2 2024Q3 2024Q4 2024Q1 2025Q2 2025Q3 2025Q4 2025Q1 2026Q2 2026
the quarter shown share split complete books; unmarked quarters rest on listed positionsClick a quarter to open it.
RBRK by quarter
QuarterHoldersReported valueBuyersSellers
Q2 20248$108m80
Q3 20248$230m65
Q4 202414$612m94
Q1 202518$684m154
Q2 202520$1.4bn129
Q3 202518$912m810
Q4 202517$584m1819
Q1 202611$342m1422
Q2 202613$1.8bn1518

Compare with…

Holders over time, buyers and sellers, and the managers holding both, side by side for up to four stocks.

RBRK and GOOGL →RBRK and AMZN →RBRK and MSFT →Choose a stock to compare with RBRK →

How much of the picture this is

A 13F is a manager’s long US-listed equity book at a quarter end, filed up to 45 days later. It shows no shorts, cash, bonds or performance, and it is never today’s portfolio. Large books are listed to their largest positions, so a manager missing from this table may still hold a small position below that line. These are 95 tracked managers, not the institutional market.

Which funds own RBRK, latest filings →Back to the 13F Explorer →