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Smart Money Score
Composite context from Form 4, 13F and congressional disclosures; not a forecast.
Of the 22 tracked institutions holding WDC, 15 have a 3-year clone track record — 13 of them beat the S&P. Average holder's clone alpha: +5.9pt. It's a gauge of who owns the name, not just how many.
Among the 22 tracked institutional investors we monitor, WDC (WESTERN DIGITAL CORP) is held with a combined value of $62.88B across 129,427,300 shares. The largest holder is BlackRock, Inc. with a position worth $21.05B (0.31% of their portfolio). MAVERICK CAPITAL LTD opened a new position in the most recent quarter. 4 funds increased their holdings. 16 funds reduced their position.
Total Institutional Value
$62.88B
Total Shares Held
129,427,300
Institutional Holders
22
% of Shares Outstanding
35.9%
of 360.54M shares · SEC 2026-08-07
Days to Cover
2.3-17.6%
20.28M shares short · FINRA 2026-08-14
Tracked 13F institutions hold 35.9% of WDC's shares outstanding. This is a floor: 13F filings arrive on a ~45-day lag and we track only a subset of institutional filers, so true institutional ownership is higher. Shares-outstanding is the latest SEC cover-page figure (as of 2026-08-07), not a live float.
Ranked by estimated dollars moved (share change × implied price). 13F data lags up to 45 days.
0
$0
54
$17.84M
Total Transactions
54
Last 12 months
| Date | Insider | Code | Type | Shares | Value |
|---|---|---|---|---|---|
| Sep 4, 2026 | Cynthia L Tregillis | S | Sale | 432 | $194.92K |
| Sep 4, 2026 | Vidyadhara K Gubbi | S | Sale | 1,795 | $825.47K |
| Sep 1, 2026 | STEPHANIE A STREETER | S | Sale | 1,600 | $728.00K |
| Aug 31, 2026 | STEPHANIE A STREETER | S | Sale | 2,000 | $897.16K |
| Aug 31, 2026 | STEPHANIE A STREETER | S | Sale | 2,000 | $894.12K |
| Aug 27, 2026 | Cynthia L Tregillis | S | Sale | 1,007 | $481.71K |
| Aug 26, 2026 | Cynthia L Tregillis | S | Sale | 476 | $214.57K |
| Aug 24, 2026 | Cynthia L Tregillis | S | Sale | 684 | $305.18K |
| Aug 21, 2026 | Cynthia L Tregillis | S | Sale | 235 | $112.16K |
| Aug 11, 2026 | Irving Tan | S | Sale | 1,880 | $835.99K |
Showing 10 of 54 transactions
| # | Fund | Value↓ | Portfolio % | Change |
|---|---|---|---|---|
| 1 | BlackRock, Inc. | $21.05B | 0.31% | -7.9% |
| 2 | FMR LLC | $16.60B | 0.72% | -17.8% |
| 3 | STATE STREET CORP | $10.40B | 0.31% | +5.2% |
| 4 | VANGUARD GROUP INC | $7.30B | 0.11% | -2.2% |
| 5 | AQR CAPITAL MANAGEMENT LLC | $1.88B | 0.65% | -15.0% |
| 6 | Capital Research Global Investors | $1.80B | 0.25% | -14.9% |
| 7 | PRICE T ROWE ASSOCIATES INC /MD/ | $1.33B | 0.13% | -21.6% |
| 8 | WELLINGTON MANAGEMENT GROUP LLP | $551.35M | 0.10% | +2511.9% |
| 9 | CITADEL ADVISORS LLC | $420.20M | 0.24% | +147.4% |
| 10 | RENAISSANCE TECHNOLOGIES LLC | $343.29M | 0.47% | -53.1% |
| Member | Type | Date |
|---|---|---|
| Gilbert Cisneros | Buy | Jul 17, 2026 |
| Alan Armstrong | Buy | Mar 27, 2026 |
| Jefferson Shreve | Sell | May 12, 2025 |
| Jefferson Shreve | Buy |
As of the latest SEC 13F filings, BlackRock, Inc. is the largest institutional holder of WDC with a position worth $21.05B, representing 0.31% of their portfolio. In total, 22 institutional investors hold WDC with a combined value of $62.88B.
In the most recent quarter, 1 fund opened a new position in WDC. Additionally, 4 increased their holdings and 16 reduced their positions.
Institutional investors hold $62.88B worth of WDC stock across 22 positions. The largest institutional holder is BlackRock, Inc. with $21.05B in holdings.
A 13F filing is a quarterly report required by the SEC from institutional investment managers with over $100 million in assets. It discloses their holdings in U.S. equities. For WDC, these filings reveal which major funds are accumulating or reducing positions, providing insights into institutional sentiment.
Get notified when hedge funds change their WDC positions.
Alpha = the manager's 3-year clone return minus the S&P 500. A skilled roster is a stronger tell than a crowded one — though even skilled managers' edge doesn't reliably survive the 13F disclosure lag. Why →
| 2026-07-31 |
SEC Schedule 13D (activist) and 13G (passive) filings for WDC. Filed when an investor acquires 5%+ ownership.
| Apr 17, 2025 |
| Rob Bresnahan | Sell | Apr 11, 2025 |
| Rob Bresnahan | Sell | Apr 10, 2025 |
| Jefferson Shreve | Sell | Mar 13, 2025 |
| Kelly Loeffler | Sell | Apr 7, 2020 |
Showing 8 of 9. STOCK Act disclosures lag up to 45 days.
Last Close
$482.28
2026-09-09
YTD
+156.9%
60% of 52-week range