X0306 4 2021-02-24 false 0001318220 Waste Connections, Inc. WCN 0001064299 MITTELSTAEDT RONALD J 3 WATERWAY SQUARE PLACE SUITE 110 THE WOODLANDS TX 77380 true true false false Executive Chairman Common Shares 2021-02-24 4 M false 6220.00 0.00 A 182247.00 D Common Shares 2021-02-24 4 F false 2151.00 98.63 D 180096.00 D Common Shares 2021-02-24 4 J false 15528.00 0.00 A 195624.00 D Common Shares 2021-02-24 4 F false 7334.00 98.63 D 188290.00 D Common Shares 2021-02-24 4 J false 3622.00 0.00 A 191912.00 D Common Shares 2021-02-24 4 F false 1711.00 98.63 D 190201.00 D Restricted Share Units 0.00 2021-02-24 4 M false 6220.00 0.00 D Common Shares 6220.00 0.00 D Restricted Share Units 0.00 2021-02-24 4 J false 15528.00 0.00 D Common Shares 15528.00 46585.00 D Restricted Share Units 0.00 2021-02-24 4 J false 3622.00 0.00 D Common Shares 3622.00 10864.00 D Represents shares withheld by the Issuer in satisfaction of the applicable withholding taxes due in connection with the vesting of restricted share units and delivery of the converted common shares. Represents the conversion of restricted share units into common shares of the Issuer. These restricted share units were previously vested and deferred under the Issuer's Deferred Compensation Plan. They are scheduled to be distributed pursuant to a multi-year installment method election as a result of the participant's transition from Chief Executive Officer of the Issuer to its Executive Chairman. The distribution represents the first of five distributions elected by the participant. Represents the conversion upon vesting of restricted share units into common shares of the Issuer. The performance-based restricted share unit award was granted on February 24, 2017 and contained a performance target that was achieved by the Issuer over the one fiscal year period that ended December 31, 2017. As a result, the award shall vest 25% per year over the four-year period following the date of grant. The common shares are reported on Table I. The deferred restricted share unit award was granted on 2/11/2010 and vested 25% per year over the four-year period following the date of grant. The deferred restricted share unit award was granted on 2/25/2013 and vested 25% per year over the four-year period following the date of grant. Ronald Mittelstaedt 2021-02-26