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STX in the 13F filings

Seagate Technology Hldngs PL · CUSIP G7997R103

Sector · Technology hardware and equipmentTheme · AI infrastructure and semiconductors· L3VLUP-defined
Quarter
Q3 2026 · early filersQ2 2026Q1 2026Q4 2025Q3 2025Q2 2025Q1 2025Q4 2024Q3 2024Q2 2024Q1 2024Q4 2023
Quarter end
31 Dec 2025
the date the book describes
Filed
27 Oct 2026
latest of these filings; the earliest 22 Jan 2026
Managers listing it
36
at least, of 95 tracked, among listed positions
Comparable managers
92
filed both Q3 2025 and Q4 2025; 18 listed it in both
Shares listed
29,532,968
combined, among listed positions
Reported value
$8.1bn
combined, at the quarter end

1 line marked †. Value as filed implies a price far from other filers'. Each counts in holders and value as filed, and is left out of the net change in shares.

Among the 92 comparable managers: 18 buyers (opened or added shares) and 20 sellers (trimmed or exited), at least, among listed positions. Their net change in shares was +6,671,632.

Managers listing STX 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.

36 of 36 holders

ActionFiling
Invesco Ltd7,356,719$2.0bn0.19%Added+5,545,69819 Feb 2026 (the filing on sec.gov)
Capital Research Global Investors4,511,989$1.2bn0.23%Trimmed-1,677,65511 Feb 2026 (the filing on sec.gov)
Fidelity (FMR LLC)3,759,659$1.0bn0.05%Added+1,778,43317 Feb 2026 (the filing on sec.gov)
Arrowstreet Capital LP3,193,063$879m0.52%Added+243,55113 Feb 2026 (the filing on sec.gov)
MFS Investment Management2,008,516$553m0.18%Added+1,883,76922 Jan 2026 (the filing on sec.gov)
T. Rowe Price Associates Inc1,163,201$320munder 0.1%Added+319,60117 Feb 2026 (the filing on sec.gov)
AQR Capital Management LLC852,472$235m0.12%Added+138,18717 Feb 2026 (the filing on sec.gov)
D. E. Shaw & Co.796,472$219m0.12%Trimmed-1,208,91417 Feb 2026 (the filing on sec.gov)
Holocene Advisors LP759,114$209m0.44%Added+571,10617 Feb 2026 (the filing on sec.gov)
Egerton Capital UK LLP729,325$201m2.18%Trimmed-863,65811 Feb 2026 (the filing on sec.gov)
Acadian Asset Management LLC670,900$185m0.30%Added+615,25010 Feb 2026 (the filing on sec.gov)
Squarepoint Ops LLC548,858$151m0.16%Added+400,75813 Feb 2026 (the filing on sec.gov)
Soroban Capital Partners LP† Value as filed implies a price far from other filers'.534,364$126m0.88%Held017 Feb 2026 (the filing on sec.gov)
Point72 Asset Management LP397,594$109m0.12%Trimmed-137,40617 Feb 2026 (the filing on sec.gov)
Renaissance Technologies LLC381,893$105m0.16%Added+324,82912 Feb 2026 (the filing on sec.gov)
Bridgewater Associates LP279,977$77m0.28%Added+117,86913 Feb 2026 (the filing on sec.gov)
Rokos Capital Management LLP279,895$77m0.30%Trimmed-210,68813 Feb 2026 (the filing on sec.gov)
AllianceBernstein LP196,770$54munder 0.1%Trimmed-37,26617 Feb 2026 (the filing on sec.gov)
Citadel Advisors LLC191,162$53munder 0.1%Added+94,82917 Feb 2026 (the filing on sec.gov)
Susquehanna International Group LLP145,141$40munder 0.1%Trimmed-410,96117 Feb 2026 (the filing on sec.gov)
Wellington Management Group LLP129,616$36munder 0.1%Added+8,90417 Feb 2026 (the filing on sec.gov)
Man Group PLC113,880$31m0.05%Added+80,09517 Feb 2026 (the filing on sec.gov)
Neuberger Berman Group LLC103,081$28munder 0.1%Trimmed-25,29027 Oct 2026 (the filing on sec.gov)
Woodline Partners LP92,118$25m0.10%Added+38,47017 Feb 2026 (the filing on sec.gov)
Millennium Management LLC81,581$22munder 0.1%Trimmed-694,60517 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 (1)

Exited (3)

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.
21 in Q3 2024 to 45 in Q2 2026

Tracked managers listing it, at least.

020406020222023202420252026
the quarter shown share split complete books; unmarked quarters rest on listed positionsClick a quarter to open it.
STX by quarter
QuarterHoldersReported valueBuyersSellers
Q2 20218$2.9bnn.a.n.a.
Q3 20219$2.4bnn.a.n.a.
Q4 202110$3.3bnn.a.n.a.
Q1 202210$2.3bnn.a.n.a.
Q2 202212$2.0bnn.a.n.a.
Q3 202210$1.5bnn.a.n.a.
Q4 202211$1.9bnn.a.n.a.
Q1 202310$2.6bnn.a.n.a.
Q2 202314$2.4bnn.a.n.a.
Q3 202316$3.1bnn.a.n.a.
Q4 202314$3.8bn78
Q1 202417$3.4bn108
Q2 202417$3.4bn107
Q3 202421$3.5bn159
Q4 202421$2.8bn166
Q1 202512$2.5bn78
Q2 202524$4.1bn187
Q3 202520$4.5bn813
Q4 202521$7.8bn1820
Q1 202630$13.7bn2713
Q2 202645$40.7bn3217

Compare with…

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

STX and NVDA →STX and AVGO →STX and MU →Choose a stock to compare with STX →

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 STX, latest filings →Back to the 13F Explorer →