Trade Filings
Managers Stocks Filings Superinvestors
Signals Institutional Buying Institutional Selling Insider Activity 13D & 13G Watch Sector Rotation
Tools Stock Screener Manager Screener Compare Managers Consensus Baskets All Research Tools Data API
Learn & AI Learn Ask the Data AI Agents
News ★ Saved
About About us Methodology Contact Disclaimer
Reader
DATA PLANS

Historical data downloads — coming with accounts.

API GATEWAY

Free read-only JSON access to the site's cached data.

Dark mode

🧭 Guided View
New to markets — prices, yields, YTD, market cap? We explain every term as you browse, in plain English. Same data, with the help built in.

⚡ Expert View
You already know the market. Just the data — clean, fast and compact, with no extra explanations. This is the default view.

Interface language
Security record · archived quarter

WDC

Western Digital Corporation · Technology · Computer Hardware

468.88 +4.0% mkt cap $161.61B quote delayed (FMP) · as of Aug 26 22:08 UTC — separate from filing data below

Q2 2026 Q1 2026 Q4 2025 Q3 2025 Q2 2025 Q1 2025 Q4 2024 Q3 2024
22Tracked holders
-2Δ holders
185.98MShares held
$22.32BReported value
+1New positions
−4Exits
Falling Conviction score 40/100 2 quarters of rising tracked shares ●●○○○○ How these are computed → Explain this at the Research Desk →

Momentum inputs (comparable managers): holder breadth -8.3% · share flow -0.9% · net new positions -13.6%formula
Broad distribution — falling shares and fewer holders

All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q3 2025

Ownership over time
QuarterHoldersΔSharesReported valueNewExits
Q2 2026 180 +6 269.24M $171.73B +9 −2
Q1 2026 176 +4 311.56M $74.93B +5 −2
Q4 2025 171 +2 309.15M $54.13B +3
Q3 2025 22 -2 185.98M $22.32B +1 −4
Q2 2025 22 +1 156.23M $9.99B +1
Q1 2025 18 -1 44.90M $1.81B +1 −2
Q4 2024 19 +1 50.55M $3.01B +1
Q3 2024 17 +1 38.18M $2.61B +3 −2
Q2 2024 16 48.73M $3.69B
Holder count
Who holds it · Q3 2025
#ManagerSharesΔ sharesValueTheir weightHeld
1 The Vanguard Group (passive) 43.28M +0.6% $5.20B 0.1% ▲ Add 2 SEC ↗
2 The Vanguard Group (passive) 43.28M +0.6% $5.20B 0.1% ▲ Add 2 SEC ↗
3 The Vanguard Group (passive) 43.28M +0.6% $5.20B 0.1% ▲ Add 2 SEC ↗
4 The Vanguard Group (passive) 43.28M +0.6% $5.20B 0.1% ▲ Add 2 SEC ↗
5 The Vanguard Group (passive) 43.28M +0.6% $5.20B 0.1% ▲ Add 2 SEC ↗
6 BlackRock (passive) 34.71M -0.8% $4.17B 0.1% ▼ Trim 2 SEC ↗
7 BlackRock (passive) 34.71M -0.8% $4.17B 0.1% ▼ Trim 2 SEC ↗
8 BlackRock (passive) 34.71M -0.8% $4.17B 0.1% ▼ Trim 2 SEC ↗
9 BlackRock (passive) 34.71M -0.8% $4.17B 0.1% ▼ Trim 2 SEC ↗
10 BlackRock (passive) 34.71M -0.8% $4.17B 0.1% ▼ Trim 2 SEC ↗
11 BlackRock (passive) 34.71M -0.8% $4.17B 0.1% ▼ Trim 2 SEC ↗
12 BlackRock (passive) 34.71M -0.8% $4.17B 0.1% ▼ Trim 2 SEC ↗
13 BlackRock (passive) 34.71M -0.8% $4.17B 0.1% ▼ Trim 2 SEC ↗
14 BlackRock (passive) 34.71M -0.8% $4.17B 0.1% ▼ Trim 2 SEC ↗
15 BlackRock (passive) 34.71M -0.8% $4.17B 0.1% ▼ Trim 2 SEC ↗
16 BlackRock (passive) 34.71M -0.8% $4.17B 0.1% ▼ Trim 2 SEC ↗
17 BlackRock (passive) 34.71M -0.8% $4.17B 0.1% ▼ Trim 2 SEC ↗
18 BlackRock (passive) 34.71M -0.8% $4.17B 0.1% ▼ Trim 2 SEC ↗
19 BlackRock (passive) 34.71M -0.8% $4.17B 0.1% ▼ Trim 2 SEC ↗
20 BlackRock (passive) 34.71M -0.8% $4.17B 0.1% ▼ Trim 2 SEC ↗
21 BlackRock (passive) 34.71M -0.8% $4.17B 0.1% ▼ Trim 2 SEC ↗
22 BlackRock (passive) 34.71M -0.8% $4.17B 0.1% ▼ Trim 2 SEC ↗
23 BlackRock (passive) 34.71M -0.8% $4.17B 0.1% ▼ Trim 2 SEC ↗
24 BlackRock (passive) 34.71M -0.8% $4.17B 0.1% ▼ Trim 2 SEC ↗
25 BlackRock (passive) 34.71M -0.8% $4.17B 0.1% ▼ Trim 2 SEC ↗
26 BlackRock (passive) 34.71M -0.8% $4.17B 0.1% ▼ Trim 2 SEC ↗
27 BlackRock (passive) 34.71M -0.8% $4.17B 0.1% ▼ Trim 2 SEC ↗
28 BlackRock (passive) 34.71M -0.8% $4.17B 0.1% ▼ Trim 2 SEC ↗
29 BlackRock (passive) 34.71M -0.8% $4.17B 0.1% ▼ Trim 2 SEC ↗
30 BlackRock (passive) 34.71M -0.8% $4.17B 0.1% ▼ Trim 2 SEC ↗
31 JPMorgan Chase 24.04M $2.89B 0.1% n/c 1 SEC ↗
32 JPMorgan Chase 24.04M $2.89B 0.1% n/c 1 SEC ↗
33 JPMorgan Chase 24.04M $2.89B 0.1% n/c 1 SEC ↗
34 JPMorgan Chase 24.04M $2.89B 0.1% n/c 1 SEC ↗
35 JPMorgan Chase 24.04M $2.89B 0.1% n/c 1 SEC ↗
36 JPMorgan Chase 24.04M $2.89B 0.1% n/c 1 SEC ↗
37 JPMorgan Chase 24.04M $2.89B 0.1% n/c 1 SEC ↗
38 JPMorgan Chase 24.04M $2.89B 0.1% n/c 1 SEC ↗
39 JPMorgan Chase 24.04M $2.89B 0.1% n/c 1 SEC ↗
40 JPMorgan Chase 24.04M $2.89B 0.1% n/c 1 SEC ↗
41 JPMorgan Chase 24.04M $2.89B 0.1% n/c 1 SEC ↗
42 JPMorgan Chase 24.04M $2.89B 0.1% n/c 1 SEC ↗
43 JPMorgan Chase 24.04M $2.89B 0.1% n/c 1 SEC ↗
44 JPMorgan Chase 24.04M $2.89B 0.1% n/c 1 SEC ↗
45 JPMorgan Chase 24.04M $2.89B 0.1% n/c 1 SEC ↗
46 JPMorgan Chase 24.04M $2.89B 0.1% n/c 1 SEC ↗
47 JPMorgan Chase 24.04M $2.89B 0.1% n/c 1 SEC ↗
48 JPMorgan Chase 24.04M $2.89B 0.1% n/c 1 SEC ↗
49 JPMorgan Chase 24.04M $2.89B 0.1% n/c 1 SEC ↗
50 JPMorgan Chase 24.04M $2.89B 0.1% n/c 1 SEC ↗
51 JPMorgan Chase 24.04M $2.89B 0.1% n/c 1 SEC ↗
52 JPMorgan Chase 24.04M $2.89B 0.1% n/c 1 SEC ↗
53 JPMorgan Chase 24.04M $2.89B 0.1% n/c 1 SEC ↗
54 JPMorgan Chase 24.04M $2.89B 0.1% n/c 1 SEC ↗
55 JPMorgan Chase 24.04M $2.89B 0.1% n/c 1 SEC ↗
56 JPMorgan Chase 24.04M $2.89B 0.1% n/c 1 SEC ↗
57 JPMorgan Chase 24.04M $2.89B 0.1% n/c 1 SEC ↗
58 JPMorgan Chase 24.04M $2.89B 0.1% n/c 1 SEC ↗
59 JPMorgan Chase 24.04M $2.89B 0.1% n/c 1 SEC ↗
60 JPMorgan Chase 24.04M $2.89B 0.1% n/c 1 SEC ↗
61 JPMorgan Chase 24.04M $2.89B 0.1% n/c 1 SEC ↗
62 JPMorgan Chase 24.04M $2.89B 0.1% n/c 1 SEC ↗
63 JPMorgan Chase 24.04M $2.89B 0.1% n/c 1 SEC ↗
64 JPMorgan Chase 24.04M $2.89B 0.1% n/c 1 SEC ↗
65 JPMorgan Chase 24.04M $2.89B 0.1% n/c 1 SEC ↗
66 JPMorgan Chase 24.04M $2.89B 0.1% n/c 1 SEC ↗
67 JPMorgan Chase 24.04M $2.89B 0.1% n/c 1 SEC ↗
68 JPMorgan Chase 24.04M $2.89B 0.1% n/c 1 SEC ↗
69 Fidelity (FMR) 23.76M -26.4% $2.85B 0.1% ▼ Trim 2 SEC ↗
70 Fidelity (FMR) 23.76M -26.4% $2.85B 0.1% ▼ Trim 2 SEC ↗
71 Fidelity (FMR) 23.76M -26.4% $2.85B 0.1% ▼ Trim 2 SEC ↗
72 Fidelity (FMR) 23.76M -26.4% $2.85B 0.1% ▼ Trim 2 SEC ↗
73 Fidelity (FMR) 23.76M -26.4% $2.85B 0.1% ▼ Trim 2 SEC ↗
74 Fidelity (FMR) 23.76M -26.4% $2.85B 0.1% ▼ Trim 2 SEC ↗
75 Fidelity (FMR) 23.76M -26.4% $2.85B 0.1% ▼ Trim 2 SEC ↗
76 Fidelity (FMR) 23.76M -26.4% $2.85B 0.1% ▼ Trim 2 SEC ↗
77 Fidelity (FMR) 23.76M -26.4% $2.85B 0.1% ▼ Trim 2 SEC ↗
78 Fidelity (FMR) 23.76M -26.4% $2.85B 0.1% ▼ Trim 2 SEC ↗
79 State Street Global Advisors (passive) 15.46M +1.8% $1.86B 0.1% ▲ Add 4 SEC ↗
80 State Street Global Advisors (passive) 15.46M +1.8% $1.86B 0.1% ▲ Add 4 SEC ↗
81 D. E. Shaw & Co. 9.63M +231.1% $1.16B 1.0% ▲ Add 6 SEC ↗
82 D. E. Shaw & Co. 9.63M +231.1% $1.16B 1.0% ▲ Add 6 SEC ↗
83 D. E. Shaw & Co. 9.63M +231.1% $1.16B 1.0% ▲ Add 6 SEC ↗
84 Geode Capital Management (passive) 9.41M +1.2% $1.13B 0.1% ▲ Add 6 SEC ↗
85 Geode Capital Management (passive) 9.41M +1.2% $1.13B 0.1% ▲ Add 6 SEC ↗
86 Morgan Stanley 8.40M $1.01B 0.1% n/c 1 SEC ↗
87 Morgan Stanley 8.40M $1.01B 0.1% n/c 1 SEC ↗
88 Morgan Stanley 8.40M $1.01B 0.1% n/c 1 SEC ↗
89 Morgan Stanley 8.40M $1.01B 0.1% n/c 1 SEC ↗
90 Morgan Stanley 8.40M $1.01B 0.1% n/c 1 SEC ↗
91 Morgan Stanley 8.40M $1.01B 0.1% n/c 1 SEC ↗
92 Morgan Stanley 8.40M $1.01B 0.1% n/c 1 SEC ↗
93 Morgan Stanley 8.40M $1.01B 0.1% n/c 1 SEC ↗
94 Morgan Stanley 8.40M $1.01B 0.1% n/c 1 SEC ↗
95 Morgan Stanley 8.40M $1.01B 0.1% n/c 1 SEC ↗
96 Morgan Stanley 8.40M $1.01B 0.1% n/c 1 SEC ↗
97 Morgan Stanley 8.40M $1.01B 0.1% n/c 1 SEC ↗
98 Morgan Stanley 8.40M $1.01B 0.1% n/c 1 SEC ↗
99 Morgan Stanley 8.40M $1.01B 0.1% n/c 1 SEC ↗
100 Morgan Stanley 8.40M $1.01B 0.1% n/c 1 SEC ↗

“Their weight” = the position's share of that manager's reported 13F equity value — the conviction measure. ✦ = curated manager.

New buyers

No new tracked buyers this quarter.

Exited

Norges Bank $220.68M was 0.0%
Elliott Investment Management $143.98M was 1.2%
Glenview Capital $38.43M was 1.1%
Soros Fund Management $8.60M was 0.2%

Full-market context: across ALL 13F filers (SEC structured data, Q1 2026): 1 holders, 18.70K shares, $5,058 reported. This is a different, older period than the tracked-universe figures above and the two are never mixed.

Frequently co-owned

What else this security's tracked holders most often hold — shared-ownership counts, not fundamental relationships.

Beneficial ownership
Aug 06 SC 13G/A — FMR LLC

View original SEC filing ↗

Jul 31 SC 13G/A — VANGUARD PORTFOLIO MANAGEMENT LLC

View original SEC filing ↗

Provenance: Ownership from parsed 13F common-stock positions (tracked universe, comparable sets for changes); insider rows from Forms 3/4/5; stakes from Schedules 13D/13G; every filing links to its original on SEC EDGAR. Reporting period: Q3 2025 · Methodology · Get this via the API