The largest holder of Waste Connections stock is Vanguard Capital Management LLC, with 19.9 million shares (7.90% of the company), worth about $3.29 billion as of September 25, 2026. The 10 largest holders together own 37.5%.
In Q2 2026, 873 institutional holdings reports listed shares worth $35.80 billion.
Insiders reported 91 transactions in the last two years: 18 sales worth $12.48 million and 1 purchase. The newest one on file is from May 13, 2026 (Nielsen Robert Iii, Officer).
Major holders as of September 25, 2026; quarterly totals from institutional holdings reports (latest Q2 2026); insider transactions on file through May 13, 2026.

2026Q2
| Holder | Shares | % of company | Value |
|---|---|---|---|
| Vanguard Capital Management LLC | 19.9 million | 7.90% | $3.3B |
| Vanguard Capital Management LLC | 15.8 million | 6.27% | $2.6B |
| Royal Trust Corporation of Canada | 13.6 million | 5.39% | $2.2B |
| Vanguard Portfolio Management LLC | 11.2 million | 4.46% | $1.9B |
| BMO Bank NA (Investment Management) | 7.6 million | 3.02% | $1.3B |
| 1832 Asset Management LP | 7.5 million | 2.96% | $1.2B |
| Fidelity Management & Research Co. LLC | 5.3 million | 2.12% | $883.0M |
| Mackenzie Financial Corp. | 4.7 million | 1.86% | $777.0M |
| Capital Research & Management Co. (International Investors) | 4.6 million | 1.82% | $758.0M |
| TD Waterhouse Private Investment Counsel, Inc. | 4.2 million | 1.68% | $699.0M |
As of September 25, 2026.
| Quarter | Reports | Shares | Value |
|---|---|---|---|
| Q2 2026 | 873 | – | $35.8B |
| Q1 2026 | 817 | 215.0 million | $34.9B |
| Q4 2025 | 834 | 220.0 million | $38.6B |
| Q3 2025 | 779 | 216.0 million | $37.9B |
| Q2 2025 | 791 | 233.0 million | $43.5B |
| Q1 2025 | 766 | 222.0 million | $43.4B |
| Q4 2024 | 768 | 229.0 million | $39.4B |
| Q3 2024 | 753 | 225.0 million | $40.2B |
Shares and value held by institutions that file quarterly holdings reports (options not included).
| Insider | Date | Title | Transaction | Value |
|---|---|---|---|---|
| Nielsen Robert Iii | May 13, 2026 | Officer | Sale at price 151.00 - 153.00 per share. | $95,351 |
| Mittelstaedt Ronald James | May 12, 2026 | Chief Executive Officer | Purchase at price 152.24 per share. | $7.6M |
| Hansen Eric O | Apr 30, 2026 | Chief Technology Officer | Sale at price 164.82 per share. | $988,925 |
| Little James Michael | Apr 27, 2026 | Officer | Sale at price 163.98 per share. | $427,168 |
| Florness Daniel Lars | Apr 1, 2026 | Director | -- | – |
| Tan Derek | Mar 4, 2026 | Officer | Sale at price 171.03 per share. | $200,618 |
| Mittelstaedt Ronald James | Feb 18, 2026 | Chief Executive Officer | -- | – |
| Little James Michael | Feb 18, 2026 | Officer | -- | – |
| Shea Patrick James | Feb 18, 2026 | General Counsel | -- | – |
| Whitney Mary Anne G | Feb 18, 2026 | Chief Financial Officer | -- | – |
| Black Matthew Stephen | Feb 18, 2026 | Officer | -- | – |
| Netherton Susan Rhea | Feb 18, 2026 | Officer | -- | – |
Newest 12 of 91 insider transactions in the last two years.
Vanguard Capital Management LLC, with 7.90% of the company (as of September 25, 2026). Next: Vanguard Capital Management LLC (6.27%) and Royal Trust Corporation of Canada (5.39%).
873 institutional holdings reports listed Waste Connections shares in Q2 2026 worth $35.80 billion.
In the last two years insiders reported 18 sales and 1 purchase (91 transactions in all); the newest on file is from May 13, 2026.