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WDC in the 13F filings

Western Digital Corp · CUSIP 958102105

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
37
at least, of 95 tracked, among listed positions
Comparable managers
92
filed both Q3 2025 and Q4 2025; 27 listed it in both
Shares listed
68,939,354
combined, among listed positions
Reported value
$11.8bn
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: 13 buyers (opened or added shares) and 27 sellers (trimmed or exited), at least, among listed positions. Their net change in shares was +3,313,435.

Managers listing WDC 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.

37 of 37 holders

ActionFiling
Fidelity (FMR LLC)33,793,801$5.8bn0.30%Added+10,037,07917 Feb 2026 (the filing on sec.gov)
Invesco Ltd13,136,498$2.3bn0.21%Added+8,701,42219 Feb 2026 (the filing on sec.gov)
D. E. Shaw & Co.5,701,318$982m0.54%Trimmed-3,923,99817 Feb 2026 (the filing on sec.gov)
AQR Capital Management LLC2,972,703$512m0.27%Added+1,228,66117 Feb 2026 (the filing on sec.gov)
T. Rowe Price Associates Inc2,611,856$450munder 0.1%Added+44,09017 Feb 2026 (the filing on sec.gov)
AllianceBernstein LP1,629,027$281m0.09%Trimmed-318,34017 Feb 2026 (the filing on sec.gov)
Citadel Advisors LLC1,319,766$227munder 0.1%Trimmed-2,407,84017 Feb 2026 (the filing on sec.gov)
Capital World Investors1,063,607$183munder 0.1%Newnew11 Feb 2026 (the filing on sec.gov)
Renaissance Technologies LLC992,533$171m0.27%Trimmed-156,22912 Feb 2026 (the filing on sec.gov)
Holocene Advisors LP934,982$161m0.34%Trimmed-1,335,42817 Feb 2026 (the filing on sec.gov)
Soroban Capital Partners LP† Value as filed implies a price far from other filers'.1,146,273$138m0.96%Held017 Feb 2026 (the filing on sec.gov)
Squarepoint Ops LLC522,290$90m0.10%Trimmed-6,12313 Feb 2026 (the filing on sec.gov)
Neuberger Berman Group LLC425,789$73m0.05%Trimmed-942,60227 Oct 2026 (the filing on sec.gov)
Millennium Management LLC317,205$55munder 0.1%Trimmed-914,62017 Feb 2026 (the filing on sec.gov)
Two Sigma Investments LP310,257$53m0.08%Trimmed-971,64617 Feb 2026 (the filing on sec.gov)
Susquehanna International Group LLP233,941$40munder 0.1%Trimmed-38,21317 Feb 2026 (the filing on sec.gov)
Balyasny Asset Management LLC229,656$40m0.05%Trimmed-1,945,58717 Feb 2026 (the filing on sec.gov)
Verition Fund Management LLC211,899$37m0.14%Added+88,34613 Feb 2026 (the filing on sec.gov)
Schonfeld Strategic Advisors LLC208,981$36m0.16%Trimmed-503,63317 Feb 2026 (the filing on sec.gov)
Acadian Asset Management LLC180,516$31m0.05%Added+123,42310 Feb 2026 (the filing on sec.gov)
Point72 Asset Management LP178,785$31munder 0.1%Trimmed-750,79017 Feb 2026 (the filing on sec.gov)
Man Group PLC178,404$31m0.05%Added+84,20217 Feb 2026 (the filing on sec.gov)
Marshall Wace LLP161,868$28munder 0.1%Trimmed-160,52813 Feb 2026 (the filing on sec.gov)
Woodline Partners LP109,557$19m0.07%Newnew17 Feb 2026 (the filing on sec.gov)
Two Sigma Advisers LP76,200$13munder 0.1%Trimmed-337,60017 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 (3)

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.
21 in Q3 2024 to 38 in Q2 2026

Tracked managers listing it, at least.

0102030402014201620182020202220242026
the quarter shown share split complete books; unmarked quarters rest on listed positionsClick a quarter to open it.
WDC by quarter
QuarterHoldersReported valueBuyersSellers
Q2 201312$710mn.a.n.a.
Q3 201311$806mn.a.n.a.
Q4 201316$1.3bnn.a.n.a.
Q1 201415$1.7bnn.a.n.a.
Q2 201415$1.9bnn.a.n.a.
Q3 201419$2.4bnn.a.n.a.
Q4 201419$2.7bnn.a.n.a.
Q1 201520$2.0bnn.a.n.a.
Q2 201520$2.0bnn.a.n.a.
Q3 201521$2.6bnn.a.n.a.
Q4 201519$2.2bnn.a.n.a.
Q1 201614$2.1bnn.a.n.a.
Q2 201618$1.8bnn.a.n.a.
Q3 201618$1.7bnn.a.n.a.
Q4 201619$1.7bnn.a.n.a.
Q1 201720$2.5bnn.a.n.a.
Q2 201716$2.9bnn.a.n.a.
Q3 201720$3.5bnn.a.n.a.
Q4 201719$3.4bnn.a.n.a.
Q1 201824$4.0bnn.a.n.a.
Q2 201820$2.7bnn.a.n.a.
Q3 201814$1.2bnn.a.n.a.
Q4 201814$504mn.a.n.a.
Q1 201914$1.1bnn.a.n.a.
Q2 201912$1.6bnn.a.n.a.
Q3 201915$2.5bnn.a.n.a.
Q4 201916$2.0bnn.a.n.a.
Q1 202014$901mn.a.n.a.
Q2 20209$963mn.a.n.a.
Q3 202010$336mn.a.n.a.
Q4 202012$799mn.a.n.a.
Q1 202117$1.4bnn.a.n.a.
Q2 202117$1.6bnn.a.n.a.
Q3 202110$749mn.a.n.a.
Q4 202117$1.3bnn.a.n.a.
Q1 202214$726mn.a.n.a.
Q2 202212$878mn.a.n.a.
Q3 202211$833mn.a.n.a.
Q4 202210$1.2bnn.a.n.a.
Q1 202314$1.8bnn.a.n.a.
Q2 202313$1.7bnn.a.n.a.
Q3 202316$2.7bnn.a.n.a.
Q4 202324$4.0bn205
Q1 202428$4.4bn1315
Q2 202431$6.0bn1516
Q3 202421$3.9bn1114
Q4 202422$3.5bn1110
Q1 202517$2.3bn99
Q2 202521$4.5bn1211
Q3 202531$7.7bn2113
Q4 202524$11.6bn1327
Q1 202630$20.7bn2319
Q2 202638$47.7bn1826

Compare with…

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

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

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