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Western Digital Corp. 13F holders

1,857 funds reported a position in Western Digital Corp. in their 13F for the quarter ended 30 June 2026, together 323.4 million shares worth $206.34 billion. Against the quarter before, 481 opened a position, 589 added, 596 trimmed and 92 sold out; together they sold a net 16.6 million shares. The largest holders: BlackRock, Inc., FMR LLC and Vanguard Capital Management LLC.

Funds holding1,857+429 on Q1 2026
Shares they held323.4Mworth $206.34 billion
Net sold on the quarter16.6M sharesabout $10.59 billion at the funds' values
Funds buying to selling1,070 to 688opened or added, to cut or sold
Opened 481Added 589Held 171Trimmed 596Sold out 92
Opened: 481 fundsAdded: 589 fundsHeld: 171 fundsTrimmed: 596 fundsSold out: 92 funds

What each fund did in WDC against its 13F for the quarter before; a change under 0.1% of a holding counts as held

Q3 2024: 699 funds, 341.4 million shares699Q3 2024Q4 2024: 714 funds, 337.0 million shares714Q4 2024Q1 2025: 666 funds, 357.3 million shares666Q1 2025Q2 2025: 753 funds, 367.6 million shares753Q2 2025Q3 2025: 967 funds, 359.1 million shares967Q3 2025Q4 2025: 1,180 funds, 343.3 million shares1,180Q4 2025Q1 2026: 1,428 funds, 334.8 million shares1,428Q1 2026Q2 2026: 1,857 funds, 323.4 million shares1,857Q2 2026

Funds reporting a position in WDC in their 13F, each quarter; hover a bar for the shares they held

Filed so far for the quarter to 30 September 2026

4,696 funds have filed their 13F for the quarter so far; the rest are due by 16 November 2026. Of those, 907 reported a position in Western Digital Corp.: 77 opened one, 356 added, 335 trimmed and 158 sold out, a net 2.6 million shares bought.

FundChange in sharesShares nowStatusFiling
Amundi+1,696,5003,510,533added13F
Geode Capital Management, LLC+508,7058,920,333added13F
Deutsche Bank AG+366,9171,753,385added13F
Exchange Traded Concepts, LLC+326,4192,116,078added13F
Ofi Invest Asset Management+360,127418,798added13F
Citigroup Inc.+248,7571,255,757added13F
Robeco Institutional Asset Management B.V.-233,106397,574trimmed13F
Wealth Enhancement Advisory Services, LLC+208,803440,014added13F
Thrivent Financial for Lutherans-151,00033,329trimmed13F
Aberdeen Group plc+773,1031,024,588added13F
Bank of New York Mellon Corp-114,4382,802,447trimmed13F
FengHe Fund Management Pte. Ltd.+112,700138,361added13F
Commonwealth of Pennsylvania Public School Empls Retrmt Sys+79,65679,656new13F
Mitsubishi UFJ Asset Management Co., Ltd.+73,534949,116added13F
Mackenzie Financial Corp.-70,758205,892trimmed13F
BI Asset Management Fondsmaeglerselskab A/S+69,450155,365added13F
LPL Financial LLC-61,731420,562trimmed13F
Arbejdsmarkedets Tillaegspension+60,96060,960new13F
KBC Group NV-59,281150,114trimmed13F
Bahl & Gaynor LLC-53,389267,778trimmed13F
Sumitomo Mitsui Trust Group, Inc.-49,297805,827trimmed13F
Vest Financial, LLC+46,24878,950added13F
Y-Intercept (Hong Kong) Ltd+44,80751,188added13F
Fideuram Asset Management (Ireland) dac-39,66512,889trimmed13F
CIBC Asset Management Inc+42,191210,779added13F

The largest moves in the name among the funds that have filed, against each fund's previous 13F.

The well-known funds

Of the 44 funds followed here, 1 reported a position in Western Digital Corp. in a 13F for the quarter ended 30 September 2026, and 11 more in a 13F for an earlier quarter, the latest each has filed. The largest: FMR LLC, 26.0 million shares worth $16.60 billion, 0.7% of its reported book (its 13F for the quarter ended 30 June 2026). In the quarter, 1 fund added or opened a position and 0 trimmed or sold out; together they bought a net 508,705 shares, about $230.4 million at the funds' own value per share on 30 September 2026. A change under 0.1% of a holding counts as held.

FundSharesValueOf its bookChange on the quarterStatusQuarter endedFiling
FMR LLC25,983,645$16.60 billion0.7%-5,639,773trimmed30 June 2026, an earlier quarter13F
Geode Capital Management8,920,333$4.04 billion0.2%+508,705added30 September 202613F
Norges Bank4,629,232$2.96 billion0.3%held30 June 2026, an earlier quarter13F
Capital Research Global Investors2,816,570$1.80 billion0.3%-493,055trimmed30 June 2026, an earlier quarter13F
Citadel Advisors657,878$420.2 million0.2%+392,010added30 June 2026, an earlier quarter13F
Renaissance Technologies537,473$343.3 million0.5%-608,660trimmed30 June 2026, an earlier quarter13F
Whale Rock Capital Management400,687$255.9 million2.1%-11,319trimmed30 June 2026, an earlier quarter13F
Millennium Management351,962$224.8 million0.2%+74,309added30 June 2026, an earlier quarter13F
Bridgewater Associates172,415$110.1 million0.5%-76,624trimmed30 June 2026, an earlier quarter13F
Point72 Asset Management73,593$47.0 million0.1%-550,351trimmed30 June 2026, an earlier quarter13F
Two Sigma Investments48,556$31.0 million0.0%+46,586added30 June 2026, an earlier quarter13F
Alyeska26,282$16.8 million0.0%-129,002trimmed30 June 2026, an earlier quarter13F
Value is what the fund reported.
Read moreChange is shares against the fund's previous 13F; a fund with one filing read shows no change. 13Fs cover long US positions of managers above $100 million and are filed up to 45 days after the quarter.

The largest holders

FundSharesShare of allValueOf its bookChange in sharesFiling
BlackRock, Inc.32,953,61310.19%$21.05 billion0.31%-2,815,60913F
FMR LLC25,983,6458.03%$16.60 billion0.72%-5,639,77313F
Vanguard Capital Management LLC22,510,8116.96%$14.38 billion0.31%+475,95013F
JPMorgan Chase & Co.17,007,7895.26%$11.09 billion0.65%-504,35913F
Capital World Investors16,598,2115.13%$10.60 billion1.25%+4,718,17313F
State Street Corp.16,276,6155.03%$10.40 billion0.31%+810,84913F
Invesco Ltd.14,435,7414.46%$9.22 billion0.73%+1,789,32013F
Vanguard Portfolio Management LLC13,109,4744.05%$8.37 billion0.38%-4,063,17913F
Geode Capital Management, LLC8,411,6282.60%$5.35 billion0.28%-1,065,57313F
Morgan Stanley8,148,1442.52%$5.20 billion0.28%+209,03813F
Bank of America Corp.6,489,6302.01%$4.15 billion0.27%-1,999,98213F
Goldman Sachs Group Inc.5,178,9931.60%$3.31 billion0.35%-227,89013F
UBS AM, a distinct business unit of UBS Asset Management Americas LLC4,744,3771.47%$3.03 billion0.55%+1,841,62913F
Norges Bank4,629,2321.43%$2.96 billion0.29%13F
Nuveen, LLC3,819,1031.18%$2.44 billion0.58%+859,85813F
Northern Trust Corp.3,663,3691.13%$2.34 billion0.27%+56,80613F
Ameriprise Financial Inc.3,386,1901.05%$2.16 billion0.44%-2,376,34313F
AQR Capital Management LLC2,940,9480.91%$1.88 billion0.66%-518,61713F
Bank of New York Mellon Corp2,916,8850.90%$1.86 billion0.31%+408,13313F
Capital Research Global Investors2,816,5700.87%$1.80 billion0.25%-493,05513F
Legal & General Group Plc2,509,5920.78%$1.60 billion0.33%+380,42213F
Dimensional Fund Advisors LP2,448,1370.76%$1.56 billion0.28%-55,18413F
Fred Alger Management, LLC2,206,3260.68%$1.41 billion4.70%-453,50913F
Charles Schwab Investment Management Inc.2,132,3950.66%$1.36 billion0.18%-74,54613F
Price T Rowe Associates Inc.2,075,8010.64%$1.33 billion0.13%-570,68313F
Vanguard Fiduciary Trust Co.1,979,1310.61%$1.26 billion0.28%+70,80613F
D. E. Shaw & Co., Inc.1,901,7870.59%$1.21 billion0.79%-786,44313F
Amundi1,814,0330.56%$1.16 billion0.28%-1,244,83413F
Capital International Investors1,803,5880.56%$1.15 billion0.24%new13F
Exchange Traded Concepts, LLC1,789,6590.55%$1.14 billion5.65%+1,738,50913F
WCM Investment Management, LLC1,632,1210.50%$1.06 billion1.93%-4,929,68913F
Bank of Montreal1,634,6750.51%$1.04 billion0.38%+229,63313F
BNP Paribas Financial Markets1,493,5930.46%$954.0 million0.50%+304,63713F
Anther Capital Ltd1,411,5750.44%$901.6 million23.09%+699,18013F
Deutsche Bank AG1,386,4680.43%$885.6 million0.26%-486,32813F
National Pension Service1,380,9020.43%$882.0 million0.57%-57,06013F
Maple Rock Capital Partners Inc.1,357,8340.42%$867.3 million17.00%-42,60013F
Royal Bank of Canada1,312,0310.41%$838.0 million0.14%+40,95713F
UBS Group AG1,258,4850.39%$803.8 million0.13%-2,923,96913F
HSBC Holdings PLC1,178,7790.36%$752.8 million0.36%-366,38813F
Jane Street Group, LLC1,052,2460.33%$672.1 million0.43%+1,017,74013F
Citigroup Inc.1,007,0000.31%$643.2 million0.30%+434,50713F
Value Aligned Research Advisors, LLC988,4290.31%$631.3 million3.77%-307,01013F
Trivest Advisors Ltd982,6000.30%$627.6 million19.73%+637,60013F
Swiss National Bank975,9870.30%$623.4 million0.33%-27,32013F
Qube Research & Technologies Ltd915,9290.28%$585.0 million0.65%new13F
National Bank of Canada909,5460.28%$581.0 million0.51%+474,81513F
Castle Hook Partners LP903,3740.28%$577.0 million6.18%+24,43513F
Mitsubishi UFJ Asset Management Co., Ltd.875,5820.27%$559.3 million0.31%+78,59913F
Wells Fargo & Company863,4450.27%$551.5 million0.10%-161,10013F
The 50 largest of the 1,857 funds that reported a position in WDC in their 13F for the quarter ended 30 June 2026, by the value each reported.
Read moreShare of all is the fund's part of all the shares the funds reported. Change is shares against the fund's 13F for the quarter before. A 13F lists a manager's long positions in US-listed shares at the quarter's end. What is a 13F?

Options the funds reported on WDC

FundOptionShares under the optionsValue of those sharesQuarter endedFiling
Citadel AdvisorsPuts5,777,700$3.69 billion30 June 202613F
Citadel AdvisorsCalls2,323,700$1.48 billion30 June 202613F
Millennium ManagementPuts327,900$209.4 million30 June 202613F
Millennium ManagementCalls311,600$199.0 million30 June 202613F
Point72 Asset ManagementCalls102,800$65.7 million30 June 202613F
Point72 Asset ManagementPuts89,400$57.1 million30 June 202613F
Two Sigma InvestmentsPuts14,500$9.3 million30 June 202613F
Two Sigma InvestmentsCalls11,500$7.3 million30 June 202613F
A 13F lists calls and puts by the shares they cover and what those shares were worth at the quarter's end, not what the options cost.
Read moreThey are not counted in the holdings above. A put gains when the stock falls, a call when it rises, and a fund may hold either to hedge.

Schedule 13D and 13G filed on the name, last twelve months

FiledScheduleWhoHoldingOf the classEvent dateRule or purposeFiling
5 November 202613G/AFMR LLC and 3 others31.6 million9.2%30 September 2026passive, institutional (13d-1(b))EDGAR
6 August 202613G/AFMR LLC and 3 others26.4 million7.2%30 June 2026passive, institutional (13d-1(b))EDGAR
31 July 202613G/AVanguard Portfolio Management and 1 other13.2 million3.6%30 June 2026passive, institutional (13d-1(b))EDGAR
30 April 202613GVanguard Capital Management and 1 other25.4 million7.5%31 March 2026passive, institutional (13d-1(b))EDGAR
29 April 202613GVanguard Portfolio Management and 1 other17.2 million5.1%31 March 2026passive, institutional (13d-1(b))EDGAR
27 March 202613G/AThe Vanguard Group and 1 other00.0%13 March 2026passive, institutional (13d-1(b))EDGAR
10 February 202613G/AManaged Account Advisors LLC and 1 other9.0 million2.6%31 December 2025passive, institutional (13d-1(b))EDGAR
8 January 202613G/AFMR LLC and 3 others34.5 million10.1%31 December 2025passive, institutional (13d-1(b))EDGAR
13 November 202513G/AManaged Account Advisors LLC and 1 other18.4 million5.3%30 September 2025passive, institutional (13d-1(b))EDGAR
A Schedule 13D is filed by anyone who crosses 5% of a class with intent to influence; a 13G by a passive holder.
Read moreAmendments (/A) report a change, including an exit to zero. Holding and percentage are as the filer stated them on the cover page; the purpose is the filer's own words, cut short. 13D and 13G

Fails to deliver

Settlement dateShares failedPriceFile
17 August 2026654$508.80SEC
11 August 20261$438.34SEC
7 August 20261$451.52SEC
5 August 2026238$548.56SEC
3 August 20261,100$544.84SEC
29 July 20262,782$463.51SEC
20 July 20261,556$477.22SEC
17 July 20263,575$466.81SEC
Shares that failed to deliver at settlement, per day, from the SEC's half-month files, which arrive about two weeks after the period.
Read moreLargest in the window: 3,575 on 17 July 2026. A fail is an operational fact about settlement, not a position.