L3VLUP
ProSign in

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
31 Dec 2025
the date the book describes
Filed
27 Oct 2026
latest of these filings; the earliest 10 Feb 2026
Managers listing it
35
at least, of 95 tracked, among listed positions
Comparable managers
92
filed both Q3 2025 and Q4 2025; 16 listed it in both
Shares listed
19,714,005
combined, among listed positions
Reported value
$1.5bn
combined, at the quarter end

Among the 92 comparable managers: 18 buyers (opened or added shares) and 19 sellers (trimmed or exited), at least, among listed positions. Their net change in shares was +433,103.

Managers listing RBRK in Q4 2025

Share of 13F value is the position’s reported value over everything the manager reported that quarter. The share change is against Q3 2025, and only where both filings list the position. A rise in value with no rise in shares is the price, not buying.

35 of 35 holders

ActionFiling
Fidelity (FMR LLC)5,271,860$403munder 0.1%Added+2,652,48117 Feb 2026 (the filing on sec.gov)
Millennium Management LLC1,216,854$93munder 0.1%Added+335,26517 Feb 2026 (the filing on sec.gov)
AQR Capital Management LLC1,081,419$83munder 0.1%Trimmed-107,98417 Feb 2026 (the filing on sec.gov)
Susquehanna International Group LLP1,078,545$82munder 0.1%Added+221,44117 Feb 2026 (the filing on sec.gov)
D. E. Shaw & Co.905,540$69munder 0.1%Trimmed-186,55317 Feb 2026 (the filing on sec.gov)
Invesco Ltd879,773$67munder 0.1%Trimmed-194,25219 Feb 2026 (the filing on sec.gov)
Squarepoint Ops LLC857,898$66m0.07%Added+189,45813 Feb 2026 (the filing on sec.gov)
AllianceBernstein LP813,314$62munder 0.1%Added+39,58417 Feb 2026 (the filing on sec.gov)
Renaissance Technologies LLC723,389$55m0.09%Trimmed-84,31112 Feb 2026 (the filing on sec.gov)
Two Sigma Investments LP716,267$55m0.08%Added+657,26717 Feb 2026 (the filing on sec.gov)
Walleye Capital LLC657,305$50m0.15%Added+657,03213 Feb 2026 (the filing on sec.gov)
Schonfeld Strategic Advisors LLC592,364$45m0.20%Newnew17 Feb 2026 (the filing on sec.gov)
Citadel Advisors LLC575,873$44munder 0.1%Trimmed-2,103,34617 Feb 2026 (the filing on sec.gov)
T. Rowe Price Associates Inc556,359$43munder 0.1%Trimmed-642,53117 Feb 2026 (the filing on sec.gov)
Holocene Advisors LP525,000$40m0.08%Held017 Feb 2026 (the filing on sec.gov)
Voloridge Investment Management LLC510,882$39m0.14%Added+8,87817 Feb 2026 (the filing on sec.gov)
ARK Investment Management LLC454,276$35m0.23%Added+135,16411 Feb 2026 (the filing on sec.gov)
Marshall Wace LLP443,704$34munder 0.1%Added+40,68713 Feb 2026 (the filing on sec.gov)
Wellington Management Group LLP373,533$29munder 0.1%Added+215,12717 Feb 2026 (the filing on sec.gov)
Two Sigma Advisers LP289,500$22munder 0.1%Added+283,40017 Feb 2026 (the filing on sec.gov)
Freestone Grove Partners LP243,730$19m0.13%Held017 Feb 2026 (the filing on sec.gov)
Man Group PLC214,151$16munder 0.1%Trimmed-420,76617 Feb 2026 (the filing on sec.gov)
Acadian Asset Management LLC139,650$11munder 0.1%Trimmed-416,72510 Feb 2026 (the filing on sec.gov)
Janus Henderson Group Ltd128,714$9.8munder 0.1%Added+76,35117 Feb 2026 (the filing on sec.gov)
Hudson Bay Capital Management LP124,000$9.5munder 0.1%Trimmed-235,00013 Feb 2026 (the filing on sec.gov)
Page 1 of 2

Largest increases and reductions, by shares

Q3 2025 to Q4 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 (4)

Exited (4)

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 →