Who holds ticker verified against the SEC company list on 2026-09-10 — a reviewed name-and-class mapping row, never an inferred symbol. how tickers are mapped ↗

WESTERN DIGITAL CORP · common stock (filed as COM) · Q1 2026 · 14 members disclosed WDC ↗
13F filers reporting this class for the quarter ended 2026-03-31; 1–500 of 1,186 holders are listed, largest first
1,186
sum of the reported values across every holder; undisclosed values are left out, never counted as zero
$82.2B
holders whose share count rose or who opened the position (new + add), by shares
653
holders absent this quarter after holding last quarter — inferred from absence, not a sale record
102
FILING WINDOW OPEN
Q3 2026 filings are due by 2026-11-16 — figures for that quarter will change; missing filers are not zeros.

Holders — quarter ended 2026-03-31

by reported value · Δ shares vs 2025-12-31Holders rank by reported value. The change kind — new, add, trim or exit — is read from the share count against the prior quarter, never from the reported value.
13F holders of WDC ranked by reported value, 1–25 of 1,186 holders
#FilerReported valueSharesΔ sharesChange
1BlackRock, Inc.$9.7B35,769,222+259,704ADD
2FMR LLC$8.6B31,623,418−2,170,383TRIM
3VANGUARD CAPITAL MANAGEMENT LLC$6.0B22,034,861—NO PRIOR
4VANGUARD PORTFOLIO MANAGEMENT LLC$4.6B17,172,653—NO PRIOR
5JPMORGAN CHASE & CO$4.4B17,512,148+3,216,183ADD
6STATE STREET CORP$4.2B15,465,766−230,188TRIM
7Capital World Investors$3.2B11,880,038+10,816,431ADD
8GEODE CAPITAL MANAGEMENT, LLC$2.6B9,477,201+194,769ADD
9BANK OF AMERICA CORP /DE/$2.3B8,489,612−3,555,039TRIM
10MORGAN STANLEY$2.1B7,939,106−1,005,556TRIM
11WCM INVESTMENT MANAGEMENT, LLC$1.7B6,561,810−129,399TRIM
12AMERIPRISE FINANCIAL INC$1.6B5,762,533−2,757,892TRIM
13Invesco Ltd.$1.5B5,530,864+75,621ADD
14UBS Group AG$1.1B4,182,454−368,367TRIM
15NORTHERN TRUST CORP$976M3,606,563−65,392TRIM
16AQR CAPITAL MANAGEMENT LLC$913M3,459,565+486,862ADD
17Capital Research Global Investors$895M3,309,625+3,309,625NEW
18Amundi$827M3,058,867+659,131ADD
19Nuveen, LLC$800M2,959,245−1,604,231TRIM
20UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC$785M2,902,748+93,339ADD
21D. E. Shaw & Co., Inc.$727M2,688,230−3,013,088TRIM
22Bank of New York Mellon Corp$679M2,508,752+435,716ADD
23DIMENSIONAL FUND ADVISORS LP$677M2,503,321−1,062,021TRIM
24CHARLES SCHWAB INVESTMENT MANAGEMENT INC$597M2,206,941−59,768TRIM
25Legal & General Group Plc$576M2,129,170+95,615ADD
Show the top 500 of 1,186 holders
Truncated by Public Filings. Top 500 of 1,186 holders shown; the rest are on EDGAR. Method ↗
Newest filing in this build: 2026-07-31. Per-row filing dates are on each receipt.

Congress ↔ notable managers · WDC

Congress · last 90 days

Buyers
1 Gilbert Ray Cisneros, Jr. D–CA-31 $1K–$15K
Sellers
1 Gilbert Ray Cisneros, Jr. D–CA-31 $1K–$15K

filed 2026-07-31 → 2026-10-29 · statutory ranges

Use of congressional disclosure reports for commercial purposes, credit decisions or solicitation is restricted by 5 U.S.C. §13107(c).

Notable managers · quarter ended 2026-03-31

by shares · $ = value heldNEW + ADD vs TRIM + EXIT, by share count. $ = reported value now, not the change. · WESTERN DIGITAL CORP

Merged timeline of congressional filings and notable-manager moves on WDC
DateWhoChangeSize
2026-10-12Gilbert Ray Cisneros, Jr. CongressSELL$1K–$15K
2026-09-04Gilbert Ray Cisneros, Jr. CongressBUY$1K–$15K
2026-05-15Bridgewater Associates 13FADD+176,700 sh
2026-05-15Tudor Investment Corp 13FADD+53,842 sh
2026-05-15Moore Capital Management 13FNEW+880 sh
2026-05-15Gotham Asset Management 13FTRIM−138,986 sh
2026-05-14Caxton Associates 13FTRIM−10,297 sh

7 newest, by filing date · 13F rows are quarter-end snapshots, not trades

A 13F is a quarterly, long-only snapshot filed up to 45 days late — not current holdings. what a 13F covers ↗

13F reports cover LONG positions in Section 13(f) securities (US exchange-traded equities plus reportable options, warrants, certain convertibles) held by managers with at least $100M in such securities — so managers below that threshold are absent entirely. No short positions, no cash, no non-13(f) assets — not a full portfolio, and not a census of institutional ownership.

Positions are quarter-end snapshots filed up to 45 days late — not current holdings: a position may have changed or closed since the quarter ended.

Values are the manager's stated market value at quarter-end in era-dependent units (whole dollars for form versions effective 2023-01-03 onward, thousands before), normalized here to whole dollars; each record notes its original unit.

Affiliated managers may report the same position, so one position can appear under more than one filer.

Positions under confidential treatment may be omitted until a later amendment discloses them.

These are disclosures, not investment advice.