Western Digital Corporation
Western Digital Corporation (WDC) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · WDC · as of Sep 30, 2025
Ownership Breakdown
1,048
Institutional Holders
▲ 218 vs Q2
$41.45B
Total Inst. Value
▲ $18.08B vs Q2
344.68M
Shares Outstanding
freeFloat 99.03%
345.58M
13F Shares Held
▼ 19.63M vs Q2
Institutional ownership = 13F shares ÷ total outstanding. Insider % = 100 − free float. Public % = free float − institution %. Data: FMP /symbol-positions-summary + /shares-float + SEC EDGAR.
Top Institutional Holders
WDC largest shareholders · institutional ownership
Q3 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
VANGUARD GROUP INC computer storage devices | 43.28M | 12.44% | 12.44% | $5.20T | Nov 7, 2025 | ▲ 243.2K |
BLACKROCK, INC. computer storage devices | 34.71M | 9.98% | 9.98% | $4.17T | Nov 12, 2025 | ▼ 282.0K |
FMR LLC computer storage devices | 23.76M | 6.83% | 6.83% | $2.85T | Nov 13, 2025 | ▼ 8.50M |
BANK OF AMERICA CORP /DE/ computer storage devices | 22.36M | 6.43% | 6.43% | $2.68T | Feb 3, 2026 | ▼ 3.52M |
STATE STREET CORP computer storage devices | 15.46M | 4.44% | 4.44% | $1.86T | Nov 14, 2025 | ▲ 277.3K |
JPMORGAN CHASE & CO computer storage devices | 12.02M | 3.45% | 3.45% | $1.44T | Nov 26, 2025 | ▲ 711.6K |
D. E. SHAW & CO., INC. computer storage devices | 9.63M | 2.77% | 2.77% | $1.16T | Nov 14, 2025 | ▲ 6.72M |
GEODE CAPITAL MANAGEMENT, LLC computer storage devices | 9.41M | 2.71% | 2.71% | $1.13T | Nov 12, 2025 | ▲ 109.2K |
AMERIPRISE FINANCIAL INC computer storage devices | 8.68M | 2.50% | 2.50% | $1.04T | Nov 14, 2025 | ▼ 376.2K |
MORGAN STANLEY computer storage devices | 8.40M | 2.41% | 2.41% | $1.01T | May 27, 2026 | ▲ 576.3K |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q3 2025 vs prior quarter
Q3 2025
31
Increased
+28.64M shares2
New Positions
first time holders17
Decreased
−31.85M shares0
Sold Out
fully exitedNet shares change (top 50)
3.21M
+28.64M / −31.85M
Net new holders
+16
2 new / 0 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
WDC insider trading · insider activity
Source: SEC Form 4
Insiders have been primarily selling shares recently. Selling may be driven by pre-scheduled Rule 10b5-1 plans rather than negative sentiment.
19
Buy transactions
72
Sell transactions
0.26
Buy/Sell ratio
$0M
Total disposed
Recent Insider Transactions
Showing 10 most recent · Common Stock only
| Name · Role | Date | Type | Shares | Price | Value | After Trans. | Filing |
|---|---|---|---|---|---|---|---|
Tregillis Cynthia L Chief Legal Officer & Corp Sec | Jun 3, 2026 | Tax Withhold | 699 | $594.11 | $415.3K | 117.1K | Form 4 ↗ |
Tregillis Cynthia L Chief Legal Officer & Corp Sec | Jun 5, 2026 | Sale | 432 | $545.60 | $235.7K | 116.6K | Form 4 ↗ |
Gubbi Vidyadhara K Chief of Global Operations | Jun 3, 2026 | Tax Withhold | 1,764 | $594.11 | $1.05M | 83.4K | Form 4 ↗ |
Davis Brian Scott Chief Sales & Mrktng Officer | Jun 3, 2026 | Tax Withhold | 881 | $594.11 | $523.4K | 102.6K | Form 4 ↗ |
Gubbi Vidyadhara K Chief of Global Operations | Jun 1, 2026 | Sale | 2,475 | $556.24 | $1.38M | 85.2K | Form 4 ↗ |
KIDDOO BRUCE E director | May 28, 2026 | Sale | 750 | $528.52 | $396.4K | 3.9K | Form 4 ↗ |
Das Manuvir director | May 26, 2026 | Award | 772 | — | — | 772 | Form 4 ↗ |
Tregillis Cynthia L Chief Legal Officer & Corp Sec | May 22, 2026 | Sale | 308 | $488.61 | $150.5K | 118.1K | Form 4 ↗ |
Tregillis Cynthia L Chief Legal Officer & Corp Sec | May 25, 2026 | Tax Withhold | 771 | $484.28 | $373.4K | 117.4K | Form 4 ↗ |
Tregillis Cynthia L Chief Legal Officer & Corp Sec | May 27, 2026 | Sale | 214 | $539.63 | $115.5K | 117.2K | Form 4 ↗ |
Source: /insider-trading/search (FMP stable). Buy/Sell direction: acquisitionOrDisposition A=Buy, D=Sell. RSU vesting (M-Exempt) excluded from sentiment bar. All data from SEC EDGAR public filings.
About institutional & insider ownership
Western Digital Corporation (WDC) is primarily owned by institutional investors, who hold approximately 100.0% of total shares outstanding. Company insiders own approximately 0.97%, while retail and public investors account for the remaining 0.00%.
The largest institutional shareholder of Western Digital Corporation is VANGUARD GROUP INC, holding approximately 43.28 million shares — equal to 12.44% of outstanding shares — as of September 30, 2025.
A total of 1,048 institutional investors currently hold WDC stock, with a combined institutional value of approximately $41.45 billion as of the most recent 13F filing period.
Frequently asked questions
WDC ownershipWestern Digital Corporation (WDC) is primarily owned by institutional investors, who hold approximately 100.0% of shares. The largest shareholder is VANGUARD GROUP INC with a 12.44% stake. Company insiders hold 0.97%. Data sourced from SEC Form 13F as of September 30, 2025.