The public view is the crawlable proof. The same sourced dataset is available through REST and MCP for agents, research scripts, and back-office tools.
This stock page is the Follow view. The Build view lets your agent query WD owners, fund changes, insider filings, and source links through REST or MCP.
curl -H "Authorization: Bearer YOUR_API_KEY" \ "https://arkolith.com/api/v1/stocks/WD"
Use Arkolith to show who owns WD, which funds added or reduced it, and which SEC filings prove each claim.
| # | Fund | Position value | Shares | Last move | As of | History |
|---|---|---|---|---|---|---|
| 1 | BlackRock, Inc. | $227.8M | 5.1M | ▲+1.4% Added · +71K sh | Q1 2026 | |
| 2 | VANGUARD GROUP INC | $223.5M | 3.7M | ▼−0.7% Reduced · −27K sh | Q4 2025 | |
| 3 | VANGUARD PORTFOLIO MANAGEMENT LLC | $90.5M | 2.0M | ▲New +2.0M sh | Q1 2026 | |
| 4 | ALLIANCEBERNSTEIN L.P. | $81.6M | 1.4M | ▲+11% Added · +136K sh | Q1 2026 | |
| 5 | STATE STREET CORP | $68.7M | 1.5M | ▲+3.4% Added · +50K sh | Q1 2026 | |
| 6 | VANGUARD CAPITAL MANAGEMENT LLC | $65.6M | 1.5M | ▲New +1.5M sh | Q1 2026 | |
| 7 | DIMENSIONAL FUND ADVISORS LP | $60.8M | 1.4M | ▲+8.2% Added · +104K sh | Q1 2026 | |
| 8 | JANUS HENDERSON GROUP PLC | $50.2M | 1.1M | ▼−4.4% Reduced · −52K sh | Q1 2026 | |
| 9 | GEODE CAPITAL MANAGEMENT, LLC | $36.6M | 825K | ▲+3.3% Added · +26K sh | Q1 2026 | |
| 10 | DEPRINCE RACE & ZOLLO INC | $32.3M | 728K | ▼−15% Reduced · −131K sh | Q1 2026 | |
| 11 | Alyeska Investment Group, L.P. | $23.8M | 535K | ▲+85% Added · +246K sh | Q1 2026 | |
| 12 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | $21.3M | 479K | ▼−2.2% Reduced · −11K sh | Q1 2026 | |
| 13 | BANK OF AMERICA CORP /DE/ | $21.2M | 478K | ▲+75% Added · +205K sh | Q1 2026 | |
| 14 | MORGAN STANLEY | $19.2M | 432K | ▼−9.3% Reduced · −44K sh | Q1 2026 | |
| 15 | AMERIPRISE FINANCIAL INC | $19.0M | 429K | ▲+638% Added · +371K sh | Q1 2026 | |
| 16 | NORTHERN TRUST CORP | $16.0M | 361K | ▲+9.0% Added · +30K sh | Q1 2026 | |
| 17 | FMR LLC | $15.1M | 341K | ▼−10% Reduced · −39K sh | Q1 2026 | |
| 18 | TWO SIGMA INVESTMENTS, LP | $13.9M | 313K | ▼−0.1% Reduced · −189 sh | Q1 2026 | |
| 19 | Qube Research & Technologies Ltd | $12.2M | 275K | ▲+18% Added · +41K sh | Q1 2026 | |
| 20 | Erste Asset Management GmbH | $10.9M | 250K | ▲+25% Added · +50K sh | Q1 2026 | |
| 21 | Rockefeller Capital Management L.P. | $10.7M | 241K | ▲+12% Added · +26K sh | Q1 2026 | |
| 22 | AQR CAPITAL MANAGEMENT LLC | $10.6M | 240K | ▲+325% Added · +183K sh | Q1 2026 | |
| 23 | VANGUARD FIDUCIARY TRUST CO | $9.7M | 219K | ▲New +219K sh | Q1 2026 | |
| 24 | Russell Investments Group, Ltd. | $9.1M | 205K | ▼−17% Reduced · −41K sh | Q1 2026 | |
| 25 | JANE STREET GROUP, LLC | $8.7M | 195K | ▲+7.4% Added · +13K sh | Q1 2026 |
Holders and values reflect the 13F filers Arkolith currently tracks, not the entire institutional universe. Counts and totals are a floor, not the full institutional ownership.
| Date | Insider | Role | Action | Shares | Value |
|---|---|---|---|---|---|
| Jun 4, 2026 | Walker William M | Chairman & CEO, Director | Grant (A) | 40 | $0 |
| Jun 4, 2026 | Florkowski Gregory | EVP & Chief Financial Officer | Grant (A) | 68 | $0 |
| Jun 4, 2026 | THEOBALD STEPHEN P | EVP & Chief Operating Officer | Grant (A) | 121 | $0 |
| Jun 4, 2026 | Pryor Paula A. | EVP and Chief HR Officer | Grant (A) | 41 | $0 |
| Jun 4, 2026 | Groman Daniel J | EVP, GC, Secretary & CCO | Grant (A) | 98 | $0 |
| Mar 27, 2026 | Florkowski Gregory | EVP & Chief Financial Officer | Grant (A) | 80 | $0 |
| Mar 27, 2026 | THEOBALD STEPHEN P | EVP & Chief Operating Officer | Grant (A) | 143 | $0 |
| Mar 27, 2026 | Pryor Paula A. | EVP and Chief HR Officer | Grant (A) | 49 | $0 |
| Mar 27, 2026 | Groman Daniel J | EVP, GC, Secretary & CCO | Grant (A) | 116 | $0 |
| Mar 27, 2026 | Walker William M | Chairman & CEO, Director | Grant (A) | 47 | $0 |
| Mar 18, 2026 | SCHMALTZ DANA L | Director | Buy (P) | 1K | $46K |
| Mar 13, 2026 | Wells Donna | Director | Option exercise (M) | 1K | $0 |
| Company | Co-held by | Combined value |
|---|---|---|
| MICROSOFT CORPMSFT | 82 funds | $32.3B |
| ALPHABET INC-CL AGOOGL | 80 funds | $22.1B |
| AMAZON.COM INCAMZN | 79 funds | $26.9B |
| BROADCOM INCAVGO | 79 funds | $17.1B |
| MICRON TECHNOLOGY INCMU | 79 funds | $7.1B |
| NVIDIA CORPNVDA | 78 funds | $47.3B |
| META PLATFORMS INC-CLASS AMETA | 78 funds | $16.0B |
| JPMORGAN CHASE & COJPM | 78 funds | $11.3B |
| ELI LILLY & COLLY | 77 funds | $8.9B |
| BANK OF AMERICA CORPBAC | 77 funds | $4.4B |
| UNITEDHEALTH GROUP INCUNH | 77 funds | $3.6B |
| MASTERCARD INC - AMA | 76 funds | $6.3B |
Ranked by how many of WD's institutional holders also hold each name, a cross-fund conviction signal. Via the MCP server (ticker.co_held).
13F holdings + Form 4 insider transactions + end-of-day price history + the live filing stream, joined for WD. Filings are public domain, sourced to SEC EDGAR; price series derived from end-of-day closes. Every panel above is one call to the Arkolith API & MCP server.