The largest holder of Wesco International stock is BlackRock Advisors LLC, with 6.5 million shares (13.34% of the company), worth about $2.21 billion as of September 25, 2026. The 10 largest holders together own 42.2%.
In Q2 2026, 730 institutional holdings reports listed shares worth $16.30 billion.
Insiders reported 124 transactions in the last two years: 26 sales worth $87.98 million and 2 purchases. The newest one on file is from August 17, 2026 (Khurana Akash, Chief Technology Officer).
Major holders as of September 25, 2026; quarterly totals from institutional holdings reports (latest Q2 2026); insider transactions on file through August 17, 2026.

2026Q2
| Holder | Shares | % of company | Value |
|---|---|---|---|
| BlackRock Advisors LLC | 6.5 million | 13.34% | $2.2B |
| Vanguard Capital Management LLC | 2.2 million | 4.52% | $749.0M |
| Vanguard Portfolio Management LLC | 2.1 million | 4.25% | $705.0M |
| Wellington Trust Co., NA | 2.0 million | 4.14% | $687.0M |
| DFA Australia Ltd. | 1.9 million | 3.91% | $648.0M |
| State Street Corporation | 1.5 million | 3.11% | $516.0M |
| BlackRock Life Ltd. | 1.4 million | 2.83% | $469.0M |
| BlackRock Investment Management LLC | 1.1 million | 2.21% | $367.0M |
| Invesco Advisers, Inc. | 971,590 | 1.99% | $331.0M |
| Jane Street Group LLC | 946,593 | 1.94% | $322.0M |
As of September 25, 2026.
| Quarter | Reports | Shares | Value |
|---|---|---|---|
| Q2 2026 | 730 | – | $16.3B |
| Q1 2026 | 646 | 48.8 million | $13.3B |
| Q4 2025 | 650 | 48.7 million | $11.9B |
| Q3 2025 | 588 | 49.2 million | $10.4B |
| Q2 2025 | 558 | 49.0 million | $9.1B |
| Q1 2025 | 568 | 47.9 million | $7.4B |
| Q4 2024 | 572 | 46.7 million | $8.4B |
| Q3 2024 | 549 | 46.8 million | $7.9B |
Shares and value held by institutions that file quarterly holdings reports (options not included).
| Insider | Date | Title | Transaction | Value |
|---|---|---|---|---|
| Khurana Akash | Aug 17, 2026 | Chief Technology Officer | Sale at price 366.10 - 368.27 per share. | $1.2M |
| Thompson Laura K | Aug 12, 2026 | Director | Sale at price 368.45 per share. | $99,482 |
| Castillo Daniel Jose | Aug 4, 2026 | Officer | Purchase at price 365.89 per share. | $351,254 |
| Marino Anthony S | Jul 23, 2026 | Officer | Stock Award(Grant) at price 0.00 per share. | – |
| Carter Michael Lonon | Jun 30, 2026 | Director | Stock Award(Grant) at price 0.00 per share. | – |
| Porwal Hemant | Jun 30, 2026 | Officer | Stock Award(Grant) at price 0.00 per share. | – |
| Cameron James | Jun 30, 2026 | Officer | Stock Award(Grant) at price 0.00 per share. | – |
| Khurana Akash | Jun 30, 2026 | Chief Technology Officer | Stock Award(Grant) at price 0.00 per share. | – |
| Naylor Dirk Waugh | Jun 30, 2026 | Officer | Stock Award(Grant) at price 0.00 per share. | – |
| Singleton James Louis | Jun 30, 2026 | Director | Stock Award(Grant) at price 0.00 per share. | – |
| Wajsgras David C | Jun 30, 2026 | Director | Stock Award(Grant) at price 0.00 - 345.43 per share. | $31,250 |
| Kulasa Matthew S | Jun 30, 2026 | Officer | Stock Award(Grant) at price 0.00 per share. | – |
Newest 12 of 124 insider transactions in the last two years.
BlackRock Advisors LLC, with 13.34% of the company (as of September 25, 2026). Next: Vanguard Capital Management LLC (4.52%) and Vanguard Portfolio Management LLC (4.25%).
730 institutional holdings reports listed Wesco International shares in Q2 2026 worth $16.30 billion.
In the last two years insiders reported 26 sales and 2 purchases (124 transactions in all); the newest on file is from August 17, 2026.