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STX in the 13F filings

Seagate Technology HLDGS · 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
30 Jun 2026
the date the book describes
Filed
27 Oct 2026
latest of these filings; the earliest 3 Aug 2026
Managers listing it
46
at least, of 95 tracked, among listed positions
Comparable managers
91
filed both Q1 2026 and Q2 2026; 28 listed it in both
Shares listed
42,476,754
combined, among listed positions
Reported value
$40.7bn
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: 32 buyers (opened or added shares) and 17 sellers (trimmed or exited), at least, among listed positions. Their net change in shares was +6,811,258.

Managers listing STX in Q2 2026

Share of 13F value is the position’s reported value over everything the manager reported that quarter. The share change is against Q1 2026, and only where both filings list the position. A rise in value with no rise in shares is the price, not buying.

46 of 46 holders

ActionFiling
Fidelity (FMR LLC)8,153,134$7.9bn0.34%Trimmed-23,78413 Aug 2026 (the filing on sec.gov)
Invesco Ltd7,536,880$7.3bn0.58%Added+360,18214 Aug 2026 (the filing on sec.gov)
Capital Research Global Investors4,326,781$4.2bn0.58%Trimmed-1,409,28912 Aug 2026 (the filing on sec.gov)
MFS Investment Management2,560,276$2.5bn0.80%Added+24,1543 Aug 2026 (the filing on sec.gov)
Wellington Management Group LLP2,414,136$2.3bn0.40%Added+2,326,53814 Aug 2026 (the filing on sec.gov)
Arrowstreet Capital LP2,138,429$2.1bn0.92%Added+704,93413 Aug 2026 (the filing on sec.gov)
Janus Henderson Group Ltd1,608,436$1.6bn0.63%Added+640,90814 Aug 2026 (the filing on sec.gov)
Jane Street Group LLC1,473,813$1.4bn0.12%Added+1,454,11114 Aug 2026 (the filing on sec.gov)
T. Rowe Price Associates Inc1,430,343$1.4bn0.14%Added+171,94614 Aug 2026 (the filing on sec.gov)
D. E. Shaw & Co.1,354,377$1.3bn0.62%Added+64,80414 Aug 2026 (the filing on sec.gov)
AQR Capital Management LLC1,245,371$1.2bn0.42%Added+244,33214 Aug 2026 (the filing on sec.gov)
Lone Pine Capital LLC1,000,109$965m5.90%Newnew14 Aug 2026 (the filing on sec.gov)
Point72 Asset Management LP822,914$794m0.88%Added+276,53614 Aug 2026 (the filing on sec.gov)
Citadel Advisors LLC755,495$729m0.08%Added+644,7502 Sep 2026 (the filing on sec.gov)
Millennium Management LLC633,069$611m0.22%Added+382,79014 Aug 2026 (the filing on sec.gov)
Sachem Head Capital Management LP472,000$455m9.45%Newnew14 Aug 2026 (the filing on sec.gov)
Holocene Advisors LP460,184$444m1.00%Trimmed-627,43314 Aug 2026 (the filing on sec.gov)
Renaissance Technologies LLC457,353$441m0.61%Added+146,85913 Aug 2026 (the filing on sec.gov)
Acadian Asset Management LLC447,945$432m0.51%Trimmed-156,94813 Aug 2026 (the filing on sec.gov)
Two Sigma Investments LP354,816$342m0.25%Added+252,29114 Aug 2026 (the filing on sec.gov)
Susquehanna International Group LLP288,385$278munder 0.1%Added+118,19714 Aug 2026 (the filing on sec.gov)
Tiger Global Management LLC285,100$275m1.15%Newnew14 Aug 2026 (the filing on sec.gov)
AllianceBernstein LP649,106$254m0.08%Added+453,73414 Aug 2026 (the filing on sec.gov)
Balyasny Asset Management LLC256,151$247m0.31%Trimmed-139,98514 Aug 2026 (the filing on sec.gov)
Bridgewater Associates LP199,822$193m0.79%Trimmed-129,29514 Aug 2026 (the filing on sec.gov)
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Largest increases and reductions, by shares

Q1 2026 to Q2 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 (9)

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 →