WESCO International Inc (WCC)
Who owns WESCO International Inc (WCC)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 98.3% of the shares are freely tradable; institutional investors hold 103.9%.
Ownership Structure
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| BlackRock Inc | 19.28 | 9,390,627 | +17.1 | 03/31/2026 |
| Vanguard Group Inc | 9.36 | 4,556,697 | -1.2 | 12/31/2025 |
| Wellington Management Company LLP | 7.39 | 3,600,115 | +29.3 | 03/31/2026 |
| Dimensional Fund Advisors, Inc. | 4.59 | 2,233,127 | -0.7 | 03/31/2026 |
| Vanguard Capital Management, LLC | 4.49 | 2,187,476 | +0.0 | 03/31/2026 |
| Vanguard Portfolio Management, LLC | 4.26 | 2,073,992 | +0.0 | 03/31/2026 |
| Amvescap Plc. | 3.10 | 1,509,549 | +9.1 | 03/31/2026 |
| State Street Corp | 3.01 | 1,465,249 | +1.4 | 03/31/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| iShares Core S&P Mid-Cap ETF | 3.39 | 1,649,147 | +0.0 | 05/29/2026 |
| Vanguard Total Stock Mkt Idx Inv | 3.19 | 1,553,145 | +0.2 | 04/30/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Insider Transactions
| Date | Person | Role | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| 23. Jul 2026 | Marino Anthony S | EVP & CHRO | Other | 1,021 | 0.00 | – |
Reportable transactions by officers and major shareholders from SEC Form 4 filings. "Other" includes things like stock grants and option exercises without a buy/sell character.
View all insider transactions →Data as of: July 31, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.