Who owns Western Digital (WDC)?
153 holders named in SEC filings declare between 59.1% and 84.0% of Western Digital's shares outstanding, as of Sep 20, 2026. The largest are Vanguard (10.8%), BlackRock (9.1%) and Fidelity (FMR) (7.2%); the five largest hold 37.8% together. Another 1,686 institutions hold small positions worth 5.7%. At least 10.3% of the shares appear in no ownership filing: investors who do not have to report, mostly individuals. From Mar 31, 2026 to Jun 30, 2026, institutions that filed both quarters bought 7.9% and sold 12.5% of the shares, a net sale of 4.6%; 486 opened a position, 558 added, 588 reduced and 81 sold out. Biggest buyers: Capital Group (+6.1M shares) and Invesco (+1.8M shares). Biggest sellers: Fidelity (FMR) (-5.6M) and WCM INVESTMENT MANAGEMENT, LLC (-4.9M). Schedule 13D/G filings since Mar 31, 2026: FMR LLC cut its stake to 7.3% on Jun 30, 2026. Over time, 1,814 managers declared Western Digital in their 13F for Q2 2026, against 654 for Q4 2019: together at most 93.7% of the shares outstanding, against 80.7%.
| Holder | Filing | Share of capital | As of | Holding since (13F) |
|---|---|---|---|---|
| Vanguard | 13F | 10.8% | Jun 30, 2026 | Q4 2019 or earlier |
| BlackRock | 13F | 9.1% | Jun 30, 2026 | Q4 2019 or earlier |
| Fidelity (FMR) | 13F | 7.2% | Jun 30, 2026 | Q4 2019 or earlier |
| Capital Group | 13F | 5.9% | Jun 30, 2026 | Q4 2025 |
| JPMorgan | 13F | 4.7% | Jun 30, 2026 | Q4 2019 or earlier |
| State Street | 13F | 4.5% | Jun 30, 2026 | Q4 2019 or earlier |
| Invesco | 13F | 4.0% | Jun 30, 2026 | Q4 2019 or earlier |
| Geode Capital | 13F | 2.3% | Jun 30, 2026 | Q4 2019 or earlier |
| Morgan Stanley | 13F | 2.3% | Jun 30, 2026 | Q4 2019 or earlier |
| Bank of America | 13F | 1.8% | Jun 30, 2026 | Q4 2019 or earlier |
| UBS | 13F | 1.7% | Jun 30, 2026 | Q4 2019 or earlier |
| Goldman Sachs | 13F | 1.4% | Jun 30, 2026 | Q4 2019 or earlier |
| Norges Bank | 13F | 1.3% | Jun 30, 2026 | Q4 2019 or earlier |
| Nuveen | 13F | 1.1% | Jun 30, 2026 | Q4 2019 or earlier |
| Northern Trust | 13F | 1.0% | Jun 30, 2026 | Q4 2019 or earlier |
| Ameriprise Financial, Inc. | 13F | 0.94% | Jun 30, 2026 | Q4 2019 or earlier |
| AQR | 13F | 0.82% | Jun 30, 2026 | Q4 2020 |
| BNY | 13F | 0.81% | Jun 30, 2026 | Q4 2019 or earlier |
| Legal & General | 13F | 0.70% | Jun 30, 2026 | Q4 2019 or earlier |
| Dimensional | 13F | 0.68% | Jun 30, 2026 | Q4 2019 or earlier |
| FRED ALGER MANAGEMENT, LLC | 13F | 0.61% | Jun 30, 2026 | Q2 2025 |
| Charles Schwab | 13F | 0.59% | Jun 30, 2026 | Q4 2019 or earlier |
| T. Rowe Price | 13F | 0.58% | Jun 30, 2026 | Q4 2019 or earlier |
| D. E. Shaw | 13F | 0.53% | Jun 30, 2026 | Q4 2019 or earlier |
| Amundi | 13F | 0.50% | Jun 30, 2026 | Q4 2019 or earlier |
Western Digital institutional ownership over time
| Quarter | 13F managers | Share of the company (upper bound) | Value declared | Held by stock pickers |
|---|---|---|---|---|
| Q4 2019 | 654 | 80.7% | $15.5B | 54.7% |
| Q4 2020 | 595 | 75.2% | $12.7B | 53.9% |
| Q4 2021 | 665 | 77.8% | $15.8B | 54.4% |
| Q4 2022 | 510 | 86.7% | $8.7B | 55.5% |
| Q4 2023 | 596 | 92.8% | $15.8B | 57.4% |
| Q4 2024 | 698 | 97.2% | $20.1B | 52.8% |
| Q4 2025 | 1,145 | 99.8% | $58.8B | 48.8% |
| Q2 2026 | 1,814 | 93.7% | $206.4B | 49.6% |
From SEC Form 13F, every quarter since the end of 2019, read like the current quarter: entities of a house summed, a value contradicting its share count set aside. The share of the company is an upper bound — two managers can declare the same shares — over the shares outstanding at that date.