Who owns WESCO International (WCC)
Which tracked institutional funds hold WCC, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See WCC company fundamentals →
Ownership as of the 2026-Q2 13F filings (latest filed 2026-09-22). 13F is disclosed up to 45 days after quarter-end, so the most recent quarter fills in over the following weeks.
How the tape is positioned
The tracked-fund tape on WCC is one-sided between 2026-Q1 and 2026-Q2: 263 added or opened and 88 trimmed or exited — on balance accumulating.
A prompt to read the filings, not a verdict. 13F is a quarter-end snapshot disclosed up to 45 days late; a fund adds or exits for mandate, benchmark, and timing reasons that have nothing to do with a view on the stock. This is a starting question, not a signal to trade.
Conviction spread
WCC’s largest tracked holder by dollar value, BlackRock, Inc., sizes it at 0.0% of its own reported 13F book, while the median holder sizes it at 0.1% of theirs — a 0.0pp gap the other way — the median holder sizes WCC more heavily than its largest holder by dollar value does.
Book-share is each fund’s reported value in WCC divided by its whole reported 13F book, so it is comparable across funds of different sizes and is unaffected by stock splits. A higher share means a fund has committed more of its book to the name — a starting question about conviction, not a verdict or a signal to trade.
Institutional & insider positioning
Between 2026-Q1 and 2026-Q2, across 657 tracked filers holding WCC, 318 increased or opened the position and 342 reduced or closed it; over the same quarter, open-market insider Form 4s were net sales.
This fuses two public signals for the same quarter — how tracked institutions changed their positions and whether insiders bought or sold in the open market. It describes what was filed; it is a starting question, not a verdict or a signal to trade.
New buyers & exits
Funds opening or closing a position in WCC between the 2026-Q1 and 2026-Q2 13F filings, and the largest changes among funds holding it in both. New buyers and exits are counted on fund presence (split-invariant); adds and trims are measured on reported value.
New buyers 47
- Nykredit A/S$154M
- Merewether Investment Management, LP$81M
- Qube Research & Technologies Ltd$74M
- CAPITOLIS LIQUID GLOBAL MARKETS LLC$39M
- Mizuho Markets Cayman LP$26M
- Mawer Investment Management Ltd.$26M
Full exits 45
- PointState Capital LP$81M
- NATIXIS ADVISORS, LLC$63M
- Thrivent Financial for Lutherans$53M
- PUBLIC EMPLOYEES RETIREMENT ASSOCIATION OF COLORADO$28M
- Clean Energy Transition LLP$28M
- Handelsbanken Fonder AB$23M
Largest adds
- BlackRock, Inc.$740M
- JANE STREET GROUP, LLC$323M
- NORGES BANK$202M
- CITIGROUP INC$196M
- VANGUARD CAPITAL MANAGEMENT LLC$162M
- VANGUARD PORTFOLIO MANAGEMENT LLC$148M
Largest trims
- WELLINGTON MANAGEMENT GROUP LLP$288M
- BAUPOST GROUP LLC/MA$164M
- Allspring Global Investments Holdings, LLC$104M
- VAUGHAN NELSON INVESTMENT MANAGEMENT, L.P.$85M
- AMERIPRISE FINANCIAL INC$67M
- Invesco Ltd.$58M
Institutional holders
One row per tracked fund, most shares held first (every row is from one quarter; reported value breaks ties). “% of value” is the fund’s share of this security’s tracked institutional value — not of shares outstanding.
| Fund | Shares | Reported value | % of value | Quarter |
|---|---|---|---|---|
| BlackRock, Inc. added | 8,958,787 | $3.1B | 21.0% | 2026-Q2 |
| VANGUARD CAPITAL MANAGEMENT LLC added | 2,200,573 | $760M | 5.2% | 2026-Q2 |
| VANGUARD PORTFOLIO MANAGEMENT LLC trimmed | 2,072,241 | $716M | 4.9% | 2026-Q2 |
| WELLINGTON MANAGEMENT GROUP LLP trimmed | 2,018,251 | $697M | 4.7% | 2026-Q2 |
| DIMENSIONAL FUND ADVISORS LP trimmed | 2,013,677 | $696M | 4.7% | 2026-Q2 |
| STATE STREET CORP added | 1,515,816 | $524M | 3.6% | 2026-Q2 |
| Invesco Ltd. trimmed | 971,590 | $336M | 2.3% | 2026-Q2 |
| JANE STREET GROUP, LLC added | 946,593 | $327M | 2.2% | 2026-Q2 |
| GEODE CAPITAL MANAGEMENT, LLC trimmed | 927,915 | $321M | 2.2% | 2026-Q2 |
| NORGES BANK added | 860,367 | $297M | 2.0% | 2026-Q2 |
| BANK OF AMERICA CORP /DE/ trimmed | 857,783 | $296M | 2.0% | 2026-Q2 |
| Bank of New York Mellon Corp trimmed | 722,298 | $250M | 1.7% | 2026-Q2 |
| BAUPOST GROUP LLC/MA trimmed | 662,881 | $229M | 1.6% | 2026-Q2 |
| Alyeska Investment Group, L.P. added | 653,591 | $226M | 1.5% | 2026-Q2 |
| MORGAN STANLEY trimmed | 634,473 | $219M | 1.5% | 2026-Q2 |
| CITIGROUP INC added | 623,906 | $216M | 1.5% | 2026-Q2 |
| AQR CAPITAL MANAGEMENT LLC added | 619,132 | $214M | 1.5% | 2026-Q2 |
| LYRICAL ASSET MANAGEMENT LP trimmed | 575,980 | $199M | 1.4% | 2026-Q2 |
| FMR LLC added | 562,884 | $194M | 1.3% | 2026-Q2 |
| NEW SOUTH CAPITAL MANAGEMENT INC trimmed | 512,074 | $177M | 1.2% | 2026-Q2 |
| BARROW HANLEY MEWHINNEY & STRAUSS LLC trimmed | 507,163 | $175M | 1.2% | 2026-Q2 |
| Nykredit A/S new | 445,919 | $154M | 1.0% | 2026-Q2 |
| Artisan Partners Limited Partnership trimmed | 426,573 | $147M | 1.0% | 2026-Q2 |
| NORTHERN TRUST CORP trimmed | 421,738 | $146M | 1.0% | 2026-Q2 |
| CITADEL ADVISORS LLC added | 405,381 | $140M | 1.0% | 2026-Q2 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC added | 400,633 | $138M | 0.9% | 2026-Q2 |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. added | 388,187 | $134M | 0.9% | 2026-Q2 |
| RAYMOND JAMES FINANCIAL INC trimmed | 387,475 | $134M | 0.9% | 2026-Q2 |
| DAVIS SELECTED ADVISERS trimmed | 363,915 | $126M | 0.9% | 2026-Q2 |
| JENNISON ASSOCIATES LLC added | 322,583 | $111M | 0.8% | 2026-Q2 |
| JPMORGAN CHASE & CO added | 317,553 | $110M | 0.7% | 2026-Q2 |
| VANGUARD FIDUCIARY TRUST CO added | 308,187 | $106M | 0.7% | 2026-Q2 |
| PRINCIPAL FINANCIAL GROUP INC trimmed | 307,582 | $106M | 0.7% | 2026-Q2 |
| NOMURA ASSET MANAGEMENT INTERNATIONAL INC. trimmed | 298,199 | $103M | 0.7% | 2026-Q2 |
| Quantinno Capital Management LP added | 286,831 | $99M | 0.7% | 2026-Q2 |
| Clearbridge Investments, LLC trimmed | 278,062 | $96M | 0.7% | 2026-Q2 |
| GOLDMAN SACHS GROUP INC added | 268,449 | $93M | 0.6% | 2026-Q2 |
| Nuveen, LLC added | 267,393 | $92M | 0.6% | 2026-Q2 |
| AMERICAN CENTURY COMPANIES INC trimmed | 262,932 | $91M | 0.6% | 2026-Q2 |
| Capital Research Global Investors trimmed | 260,503 | $90M | 0.6% | 2026-Q2 |
| ENVESTNET ASSET MANAGEMENT INC trimmed | 240,378 | $83M | 0.6% | 2026-Q2 |
| Merewether Investment Management, LP new | 233,424 | $81M | 0.5% | 2026-Q2 |
| Holocene Advisors, LP trimmed | 233,193 | $81M | 0.5% | 2026-Q2 |
| Point72 Asset Management, L.P. added | 218,675 | $76M | 0.5% | 2026-Q2 |
| Allspring Global Investments Holdings, LLC trimmed | 214,636 | $69M | 0.5% | 2026-Q2 |
| Qube Research & Technologies Ltd added | 213,544 | $74M | 0.5% | 2026-Q2 |
| Copeland Capital Management, LLC trimmed | 213,242 | $74M | 0.5% | 2026-Q2 |
| VICTORY CAPITAL MANAGEMENT INC trimmed | 201,291 | $70M | 0.5% | 2026-Q2 |
| UBS Group AG trimmed | 184,951 | $64M | 0.4% | 2026-Q2 |
| ROYAL BANK OF CANADA added | 184,065 | $64M | 0.4% | 2026-Q2 |
| JONES FINANCIAL COMPANIES LLLP added | 180,092 | $63M | 0.4% | 2026-Q2 |
| Swedbank AB | 177,484 | $61M | 0.4% | 2026-Q2 |
| WELLS FARGO & COMPANY/MN added | 174,732 | $60M | 0.4% | 2026-Q2 |
| FARMERS & MERCHANTS INVESTMENTS INC trimmed | 174,057 | $60M | 0.4% | 2026-Q2 |
| VAN LANSCHOT KEMPEN INVESTMENT MANAGEMENT N.V. trimmed | 163,955 | $57M | 0.4% | 2026-Q2 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC trimmed | 153,650 | $53M | 0.4% | 2026-Q2 |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. added | 148,569 | $51M | 0.3% | 2026-Q2 |
| Vontobel Holding Ltd. trimmed | 145,266 | $50M | 0.3% | 2026-Q2 |
| Gotham Asset Management, LLC added | 136,422 | $47M | 0.3% | 2026-Q2 |
| RHUMBLINE ADVISERS trimmed | 126,531 | $44M | 0.3% | 2026-Q2 |
| SEI INVESTMENTS CO trimmed | 124,600 | $43M | 0.3% | 2026-Q2 |
| Ensign Peak Advisors, Inc trimmed | 121,666 | $42M | 0.3% | 2026-Q2 |
| SEIZERT CAPITAL PARTNERS, LLC trimmed | 121,235 | $42M | 0.3% | 2026-Q2 |
| Diamond Hill Capital Management, LLC (Investment Advisor) trimmed | 120,317 | $42M | 0.3% | 2026-Q2 |
| Russell Investments Group, Ltd. trimmed | 119,684 | $41M | 0.3% | 2026-Q2 |
| CAPITOLIS LIQUID GLOBAL MARKETS LLC new | 113,224 | $39M | 0.3% | 2026-Q2 |
| GUYASUTA INVESTMENT ADVISORS INC trimmed | 108,709 | $38M | 0.3% | 2026-Q2 |
| California Public Employees Retirement System added | 102,019 | $35M | 0.2% | 2026-Q2 |
| Retirement Systems of Alabama trimmed | 97,839 | $34M | 0.2% | 2026-Q2 |
| Swiss National Bank added | 97,655 | $34M | 0.2% | 2026-Q2 |
| CIBC Bancorp USA Inc. trimmed | 91,634 | $32M | 0.2% | 2026-Q2 |
| Generali Powszechne Towarzystwo Emerytalne | 82,679 | $29M | 0.2% | 2026-Q2 |
| Allianz Asset Management GmbH added | 81,704 | $23M | 0.2% | 2026-Q2 |
| Mizuho Markets Cayman LP new | 76,345 | $26M | 0.2% | 2026-Q2 |
| VAUGHAN NELSON INVESTMENT MANAGEMENT, L.P. trimmed | 75,790 | $26M | 0.2% | 2026-Q2 |
| Mawer Investment Management Ltd. new | 74,616 | $26M | 0.2% | 2026-Q2 |
| Legal & General Group Plc trimmed | 72,887 | $25M | 0.2% | 2026-Q2 |
| PUBLIC EMPLOYEES RETIREMENT SYSTEM OF OHIO trimmed | 72,329 | $25M | 0.2% | 2026-Q2 |
| Sea Cliff Partners Management, LP trimmed | 72,000 | $25M | 0.2% | 2026-Q2 |
| PZENA INVESTMENT MANAGEMENT LLC trimmed | 71,494 | $25M | 0.2% | 2026-Q2 |
| River Road Asset Management, LLC trimmed | 70,019 | $24M | 0.2% | 2026-Q2 |
| PRICE T ROWE ASSOCIATES INC /MD/ added | 69,765 | $24M | 0.2% | 2026-Q2 |
| MACKENZIE FINANCIAL CORP trimmed | 69,425 | $24M | 0.2% | 2026-Q2 |
| ALLIANCEBERNSTEIN L.P. added | 66,088 | $18M | 0.1% | 2026-Q2 |
| Robeco Schweiz AG added | 65,400 | $23M | 0.2% | 2026-Q2 |
| FIRST TRUST ADVISORS LP added | 65,333 | $23M | 0.2% | 2026-Q2 |
| Leeward Investments, LLC - MA trimmed | 65,299 | $23M | 0.2% | 2026-Q2 |
| ALGERT GLOBAL LLC added | 65,146 | $23M | 0.2% | 2026-Q2 |
| Rockefeller Capital Management L.P. trimmed | 64,825 | $22M | 0.2% | 2026-Q2 |
| AEGON ASSET MANAGEMENT UK Plc trimmed | 63,332 | $22M | 0.1% | 2026-Q2 |
| Azimuth Capital Investment Management LLC trimmed | 59,754 | $21M | 0.1% | 2026-Q2 |
| Jain Global LLC trimmed | 57,452 | $20M | 0.1% | 2026-Q2 |
| STATE OF WISCONSIN INVESTMENT BOARD trimmed | 56,989 | $20M | 0.1% | 2026-Q2 |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM added | 56,537 | $20M | 0.1% | 2026-Q2 |
| D.A. DAVIDSON & CO. trimmed | 55,263 | $19M | 0.1% | 2026-Q2 |
| PRUDENTIAL FINANCIAL INC trimmed | 54,727 | $19M | 0.1% | 2026-Q2 |
| First Eagle Investment Management, LLC added | 52,748 | $18M | 0.1% | 2026-Q2 |
| FRONTIER CAPITAL MANAGEMENT CO LLC trimmed | 52,111 | $18M | 0.1% | 2026-Q2 |
| AMERIPRISE FINANCIAL INC trimmed | 51,709 | $18M | 0.1% | 2026-Q2 |
| SCHRODER INVESTMENT MANAGEMENT GROUP added | 51,621 | $18M | 0.1% | 2026-Q2 |
Ownership over time
Tracked institutional holder count and total shares held by filing quarter (independent scales). The curated-era tail and any mid-ingest latest quarter are handled honestly — a partial quarter is not drawn as a collapse.
Reading this table
Funds hold the same stock for different reasons — an index fund “holds” almost everything, an active manager sizes a name to a mandate and a benchmark, and each fund entered at its own price and time. Because 13F is filed up to 45 days after quarter-end, every row is a backward-looking snapshot; a manager may have traded since. Share-class siblings (a company’s A and C shares) are rolled up to one line so a dual-class name is never double-counted. Compare like-for-like. A large holder is not an endorsement, and a fund exiting is not a warning — this is a starting question, not a verdict.
About 13F filings
A Form 13F is a quarterly disclosure that institutional investment managers with over $100 million in US-listed equities must file with the SEC. In plain English: it is a snapshot of the long stock positions a fund held at the end of a quarter. It covers long US-listed equities only — not short positions, options, cash, or private holdings — and the funds shown are the large sample we track, not the complete 13F universe.