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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 2025
the date the book describes
Filed
5 Nov 2026
latest of these filings; the earliest 12 May 2025
Managers listing it
12
at least, of 95 tracked, among listed positions
Comparable managers
95
filed both Q4 2024 and Q1 2025; 9 listed it in both
Shares listed
29,391,854
combined, among listed positions
Reported value
$2.5bn
combined, at the quarter end

Among the 95 comparable managers: 7 buyers (opened or added shares) and 8 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 STX in Q1 2025

Share of 13F value is the position’s reported value over everything the manager reported that quarter. The share change is against Q4 2024, and only where both filings list the position. A rise in value with no rise in shares is the price, not buying.

12 of 12 holders

ActionFiling
Capital Research Global Investors15,551,293$1.3bn0.29%Trimmed-69,86912 May 2025 (the filing on sec.gov)
Fidelity (FMR LLC)6,852,384$582munder 0.1%Added+193,6645 Nov 2026 (the filing on sec.gov)
Balyasny Asset Management LLC2,049,946$174m0.29%Added+1,581,10215 May 2025 (the filing on sec.gov)
Sachem Head Capital Management LP1,490,000$127m5.07%Newnew15 May 2025 (the filing on sec.gov)
Point72 Asset Management LP1,369,962$116m0.27%Trimmed-456,62821 Jul 2025 (the filing on sec.gov)
Janus Henderson Group Ltd676,186$57munder 0.1%Added+5,21015 May 2025 (the filing on sec.gov)
AQR Capital Management LLC640,819$54m0.06%Trimmed-34,92415 May 2025 (the filing on sec.gov)
Holocene Advisors LP431,347$37m0.11%Trimmed-158,67015 May 2025 (the filing on sec.gov)
Voloridge Investment Management LLC198,801$17m0.06%Addedn.a.15 May 2025 (the filing on sec.gov)
Soroban Capital Partners LP90,403$7.7m0.11%Newnew15 May 2025 (the filing on sec.gov)
Moore Capital Management LP35,000$3.0m0.06%Added+5,00012 Aug 2025 (the filing on sec.gov)
Maverick Capital Ltd5,713$485kunder 0.1%Trimmed-17,84915 May 2025 (the filing on sec.gov)

Largest increases and reductions, by shares

Q4 2024 to Q1 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 (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 →