Ticker · CUSIP 958102105

WDC

WESTERN DIGITAL CORP.

Technology·Computer Hardware

···Share

Holders (tracked)

Combined shares

31,016,943

Combined value

$5.34B

Last close

$372.52

Quarter

2025Q4

Price is +116.2% vs the avg quarter-end implied price across tracked holders.

Price · 1Y$372.52+336.17 (+924.73%)H $372.52 · L $35.81 · Avg Vol 8.4M

Tracked holders · last 8 quarters

+7 vs previous quarter over the last 8.

SEC event timeline

27 events

Ken Griffin (Citadel Advisors) trimmed2026-02-17
−2,407,840 shares · 2025Q4
Position
D.E. Shaw & Co. trimmed2026-02-17
−3,923,998 shares · 2025Q4
Position
T. Rowe Price added2026-02-17
+44,090 shares · 2025Q4
Position
Wellington Management added2026-02-17
+1,404 shares · 2025Q4
Position
Paul Tudor Jones (Tudor Investment) opened position2026-02-17
+1,951 shares · 2025Q4
Position
AQR Capital Management added2026-02-17
+1,228,661 shares · 2025Q4
Position
Two Sigma Investments trimmed2026-02-17
−971,646 shares · 2025Q4
Position
Izzy Englander (Millennium Mgmt) trimmed2026-02-17
−914,620 shares · 2025Q4
Position
Steve Cohen (Point72) trimmed2026-02-17
−750,790 shares · 2025Q4
Position
Ray Dalio (Bridgewater Associates) added2026-02-13
+20,376 shares · 2025Q4
Position
Renaissance Technologies trimmed2026-02-12
−156,229 shares · 2025Q4
Position
Norges Bank (Norway SWF) opened position2026-02-10
+4,578,446 shares · 2025Q4
Position
Ken Fisher (Fisher Asset Mgmt) opened position2026-02-09
+11,991 shares · 2025Q4
Position
AQR Capital Management added2025-11-14
+511,971 shares · 2025Q3
Position
Izzy Englander (Millennium Mgmt) added2025-11-14
+857,489 shares · 2025Q3
Position
Steve Cohen (Point72) added2025-11-14
+93,606 shares · 2025Q3
Position
Two Sigma Investments added2025-11-14
+795,387 shares · 2025Q3
Position
D.E. Shaw & Co. added2025-11-14
+6,718,155 shares · 2025Q3
Position
Wellington Management trimmed2025-11-14
−1,139 shares · 2025Q3
Position
George Soros (Soros Fund Mgmt) exited2025-11-14
−134,323 shares · 2025Q3
Position
Larry Robbins (Glenview Capital) exited2025-11-14
−600,570 shares · 2025Q3
Position
Paul Singer (Elliott Mgmt) exited2025-11-14
−2,250,000 shares · 2025Q2
Position
T. Rowe Price trimmed2025-11-14
−961,765 shares · 2025Q3
Position
Norges Bank (Norway SWF) exited2025-11-13
−3,448,666 shares · 2025Q3
Position
Ray Dalio (Bridgewater Associates) opened position2025-11-13
+51,963 shares · 2025Q3
Position
Renaissance Technologies added2025-11-13
+946,929 shares · 2025Q3
Position
Norges Bank (Norway SWF) trimmed2025-11-12
−63,611 shares · 2024Q3
Position

Insider activity

No insider transactions in the last 30 days.

View full insider history for WDC →

Follow-the-investor returns

If you'd copied each holder of WDC…

Cost basis inferred from each manager's quarter-over-quarter position changes. Sorted by % return on the position they're still holding.

Investor	First in	Cost basis	Return	Position value today
T. Rowe Price	2016Q1	$38.36	+871.2%	$973.0M
Wellington Management	2016Q1	$62.60	+495.0%	$11.6M
Ray Dalio (Bridgewater Associates)	2021Q1	$82.89	+349.4%	$26.9M
Norges Bank (Norway SWF)	2016Q1	$89.16	+317.8%	$1.71B
Renaissance Technologies	2016Q2	$110.00	+238.7%	$369.7M
AQR Capital Management	2016Q1	$117.11	+218.1%	$1.11B
Ken Griffin (Citadel Advisors)	2016Q1	$123.08	+202.7%	$491.6M
Ken Griffin (Citadel Advisors)	2016Q1	$123.08	+202.7%	$491.6M
Ken Griffin (Citadel Advisors)	2016Q1	$123.08	+202.7%	$491.6M
Izzy Englander (Millennium Mgmt)	2016Q1	$144.92	+157.1%	$110.7M
Izzy Englander (Millennium Mgmt)	2016Q1	$144.92	+157.1%	$110.7M
Izzy Englander (Millennium Mgmt)	2016Q1	$144.92	+157.1%	$110.7M
Two Sigma Investments	2016Q1	$166.16	+124.2%	$115.6M
Two Sigma Investments	2016Q1	$166.16	+124.2%	$115.6M
Two Sigma Investments	2016Q1	$166.16	+124.2%	$115.6M
D.E. Shaw & Co.	2016Q1	$168.90	+120.6%	$2.12B
D.E. Shaw & Co.	2016Q1	$168.90	+120.6%	$2.12B
D.E. Shaw & Co.	2016Q1	$168.90	+120.6%	$2.12B
Paul Tudor Jones (Tudor Investment)	2016Q1	$171.68	+117.0%	$150.0M
Paul Tudor Jones (Tudor Investment)	2016Q1	$171.68	+117.0%	$150.0M
Paul Tudor Jones (Tudor Investment)	2016Q1	$171.68	+117.0%	$150.0M
Steve Cohen (Point72)	2016Q4	$171.73	+116.9%	$173.2M
Steve Cohen (Point72)	2016Q4	$171.73	+116.9%	$173.2M
Steve Cohen (Point72)	2016Q4	$171.73	+116.9%	$173.2M
Ken Fisher (Fisher Asset Mgmt)	2025Q4	$172.27	+116.2%	$4.5M

Who moved on this name in 2025Q4

Position changes reported for the latest quarter, grouped by direction.

New positions3

Norges Bank (Norway SWF)
+4,578,446
$788.7M
Ken Fisher (Fisher Asset Mgmt)
+11,991
$2.1M
Paul Tudor Jones (Tudor Investment)
+1,951
$336K

Added to4

AQR Capital Management
+1,228,661
$211.7M
Ray Dalio (Bridgewater Associates)
+20,376
$3.5M
Wellington Management
+1,404
$242K
T. Rowe Price
+44,090
$8K

Trimmed6

D.E. Shaw & Co.
−3,923,998
$676.0M
Ken Griffin (Citadel Advisors)
−2,407,840
$414.8M
Two Sigma Investments
−971,646
$167.4M
Izzy Englander (Millennium Mgmt)
−914,620
$157.6M
Steve Cohen (Point72)
−750,790
$129.3M
Renaissance Technologies
−156,229
$26.9M

Exited0

—

Institutional ownership over time

Distinct super-investors holding this ticker · combined dollar value, by quarter.

Quarter	Holders	Shares	Combined value	Δ holders
2022Q1	22	46,977,896	$155.02B	—
2022Q2	22	50,798,201	$127.88B	—
2022Q3	22	58,968,353	$1.92B	—
2022Q4	21	64,104,362	$2.02B	-1
2023Q1	20	68,016,630	$2.56B	-1
2023Q2	17	67,374,814	$2.56B	-3
2023Q3	21	75,567,293	$3.45B	+4
2023Q4	17	85,212,531	$4.46B	-4
2024Q1	20	78,268,007	$5.34B	+3
2024Q2	21	75,265,586	$5.70B	+1
2024Q3	22	35,506,682	$2.42B	+1
2024Q4	21	33,378,714	$1.99B	-1
2025Q1	22	22,965,090	$928.1M	+1
2025Q2	21	24,087,907	$1.54B	-1
2025Q3	18	32,976,947	$3.96B	-3
2025Q4	25	31,016,943	$5.34B	+7

Congress members trading this stock

Date	Member	Type	Amount range	Filing
2025-04-11	Rob Bresnahan	Sell	$1K – $15K	PDF ↗
2025-04-10	Rob Bresnahan	Sell (P)	$1K – $15K	PDF ↗

Who owns WDC

25 super-investors · 2025Q4

Tracked stake

31.02M

Combined value

$5.34B

% of shares outstanding

—

shares-out unknown

Quarter action mix

New5Added4Trim16

#	Manager	Shares	Value	% of book	Last action	8Q trend
1	D.E. Shaw & Co.	5.70M	$982M	0.5%	Trim−3.92M
2	Ken Griffin Citadel Advisors	5.28M	$909M	0.1%	Trim−2.41M
3	Norges Bank Norway SWF	4.58M	$789M	0.1%	New+4.58M
4	Ken Griffin Citadel Advisors	3.56M	$613M	0.1%	Trim−2.41M
5	AQR Capital Management	2.97M	$512M	0.3%	Added+1.23M
6	T. Rowe Price	2.61M	$450M	0.0%	Added+44.1K
7	Ken Griffin Citadel Advisors	1.32M	$227M	0.0%	Trim−2.41M
8	Renaissance Technologies	992.5K	$171M	0.3%	Trim−156.2K
9	D.E. Shaw & Co.	832.0K	$143M	0.1%	Trim−3.92M
10	Steve Cohen Point72	465.0K	$80M	0.1%	Trim−750.8K
11	Paul Tudor Jones Tudor Investment	402.6K	$69M	0.1%	New+2.0K
12	D.E. Shaw & Co.	361.3K	$62M	0.0%	Trim−3.92M
13	Izzy Englander Millennium Mgmt	317.2K	$55M	0.0%	Trim−914.6K
14	Two Sigma Investments	310.3K	$53M	0.1%	Trim−971.6K
15	Steve Cohen Point72	300.2K	$52M	0.1%	Trim−750.8K
16	Izzy Englander Millennium Mgmt	297.2K	$51M	0.0%	Trim−914.6K
17	Paul Tudor Jones Tudor Investment	211.4K	$36M	0.1%	New+2.0K
18	Steve Cohen Point72	178.8K	$31M	0.0%	Trim−750.8K
19	Izzy Englander Millennium Mgmt	160.3K	$28M	0.0%	Trim−914.6K
20	Ray Dalio Bridgewater Associates	72.3K	$12M	0.0%	Added+20.4K
21	Wellington Management	31.2K	$5M	0.0%	Added+1.4K
22	Two Sigma Investments	26.2K	$5M	0.0%	Trim−971.6K
23	Two Sigma Investments	24.3K	$4M	0.0%	Trim−971.6K
24	Ken Fisher Fisher Asset Mgmt	12.0K	$2M	0.0%	New+12.0K	—
25	Paul Tudor Jones Tudor Investment	2.0K	$336K	0.0%	New+2.0K

Recent moves

20 transactions

TRIMTwo Sigma Investments
−971,646 · 2025Q4
TRIMSteve Cohen (Point72)
−750,790 · 2025Q4
NEWPaul Tudor Jones (Tudor Investment)
+1,951 · 2025Q4
ADDAQR Capital Management
+1,228,661 · 2025Q4
TRIMIzzy Englander (Millennium Mgmt)
−914,620 · 2025Q4
TRIMD.E. Shaw & Co.
−3,923,998 · 2025Q4
TRIMKen Griffin (Citadel Advisors)
−2,407,840 · 2025Q4
ADDWellington Management
+1,404 · 2025Q4
ADDT. Rowe Price
+44,090 · 2025Q4
ADDRay Dalio (Bridgewater Associates)
+20,376 · 2025Q4
TRIMRenaissance Technologies
−156,229 · 2025Q4
NEWNorges Bank (Norway SWF)
+4,578,446 · 2025Q4
NEWKen Fisher (Fisher Asset Mgmt)
+11,991 · 2025Q4
ADDSteve Cohen (Point72)
+93,606 · 2025Q3
ADDIzzy Englander (Millennium Mgmt)
+857,489 · 2025Q3
ADDTwo Sigma Investments
+795,387 · 2025Q3
ADDD.E. Shaw & Co.
+6,718,155 · 2025Q3
TRIMT. Rowe Price
−961,765 · 2025Q3
TRIMWellington Management
−1,139 · 2025Q3
SOLDGeorge Soros (Soros Fund Mgmt)
−134,323 · 2025Q3

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