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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 Mar 2026
the date the book describes
Filed
27 Oct 2026
latest of these filings; the earliest 12 May 2026
Managers listing it
40
at least, of 95 tracked, among listed positions
Comparable managers
91
filed both Q4 2025 and Q1 2026; 20 listed it in both
Shares listed
35,665,496
combined, among listed positions
Reported value
$14.0bn
combined, at the quarter end

AllianceBernstein LP. Values in this filing are at the previous quarter end's prices; its share count is the quarter end's.

Among the 91 comparable managers: 27 buyers (opened or added shares) and 13 sellers (trimmed or exited), at least, among listed positions. Their net change in shares was +6,132,528.

Managers listing STX in Q1 2026

Share of 13F value is the position’s reported value over everything the manager reported that quarter. The share change is against Q4 2025, and only where both filings list the position. A rise in value with no rise in shares is the price, not buying.

40 of 40 holders

ActionFiling
Fidelity (FMR LLC)8,176,918$3.2bn0.17%Added+4,417,25915 May 2026 (the filing on sec.gov)
Invesco Ltd7,176,698$2.8bn0.27%Trimmed-180,02112 May 2026 (the filing on sec.gov)
Capital Research Global Investors5,736,070$2.2bn0.35%Added+1,224,08113 May 2026 (the filing on sec.gov)
MFS Investment Management2,536,122$1.0bn0.34%Added+527,60614 May 2026 (the filing on sec.gov)
Arrowstreet Capital LP1,433,495$562m0.30%Trimmed-1,759,56814 May 2026 (the filing on sec.gov)
D. E. Shaw & Co.1,289,573$505m0.30%Added+493,10115 May 2026 (the filing on sec.gov)
T. Rowe Price Associates Inc1,258,397$493m0.06%Added+95,19615 May 2026 (the filing on sec.gov)
Holocene Advisors LP1,087,617$426m1.03%Added+328,50315 May 2026 (the filing on sec.gov)
AQR Capital Management LLC1,001,039$384m0.18%Added+148,56715 May 2026 (the filing on sec.gov)
Janus Henderson Group Ltd967,528$379m0.18%Added+943,17018 May 2026 (the filing on sec.gov)
Acadian Asset Management LLC604,893$237m0.34%Trimmed-66,00713 May 2026 (the filing on sec.gov)
Point72 Asset Management LP546,378$214m0.27%Added+148,78415 May 2026 (the filing on sec.gov)
Soroban Capital Partners LP534,364$209m0.40%Held015 May 2026 (the filing on sec.gov)
Balyasny Asset Management LLC396,136$155m0.20%Added+388,50415 May 2026 (the filing on sec.gov)
Bridgewater Associates LP329,117$129m0.58%Added+49,14015 May 2026 (the filing on sec.gov)
Renaissance Technologies LLC310,494$122m0.19%Trimmed-71,39914 May 2026 (the filing on sec.gov)
Squarepoint Ops LLC268,866$105m0.12%Trimmed-279,99215 May 2026 (the filing on sec.gov)
Millennium Management LLC250,279$98munder 0.1%Added+168,69815 May 2026 (the filing on sec.gov)
Woodline Partners LP207,507$81m0.31%Added+115,38915 May 2026 (the filing on sec.gov)
Susquehanna International Group LLP170,188$67munder 0.1%Added+25,04715 May 2026 (the filing on sec.gov)
Neuberger Berman Group LLC166,523$65munder 0.1%Added+63,44227 Oct 2026 (the filing on sec.gov)
Walleye Capital LLC137,428$54m0.22%Added+109,55113 May 2026 (the filing on sec.gov)
AllianceBernstein LP195,372$54munder 0.1%Trimmed-1,39815 May 2026 (the filing on sec.gov)
Rokos Capital Management LLP125,491$49m0.37%Trimmed-154,40415 May 2026 (the filing on sec.gov)
Citadel Advisors LLC110,745$43munder 0.1%Trimmed-80,41715 May 2026 (the filing on sec.gov)
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Largest increases and reductions, by shares

Q4 2025 to Q1 2026, 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 (5)

Exited (1)

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 →