Black Matthew Stephen

SEC source: 0001562180-24-001516 · primarydocument.xml · derivative · entry 12

Black Matthew Stephen · CIK 0001544201 · Sr VP Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,379

Underlying: Common Shares · 793 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F4 · derivative.exercise_date: Represents the conversion upon vesting of restricted share units into common shares of the Issuer. The restricted share units were awarded on February 17, 2023 and vest in four equal annual installments. The common shares are reported in Table 1.

F4 · derivative.expiration_date: Represents the conversion upon vesting of restricted share units into common shares of the Issuer. The restricted share units were awarded on February 17, 2023 and vest in four equal annual installments. The common shares are reported in Table 1.

SEC source: 0001562180-24-001516 · primarydocument.xml · nonDerivative · entry 2

Black Matthew Stephen · CIK 0001544201 · Sr VP Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 32,798

F1 · kind: 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.

SEC source: 0001562180-24-001516 · primarydocument.xml · nonDerivative · entry 1

Black Matthew Stephen · CIK 0001544201 · Sr VP Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 32,992

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001562180-24-001516 · primarydocument.xml · derivative · entry 11

Black Matthew Stephen · CIK 0001544201 · Sr VP Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,576

Underlying: Common Shares · 2,576 shares

Expires not disclosed

F3 · derivative.exercise_date: Represents an award of performance-based restricted share units. The target number of units is presented in the table. Subject to certain continued employment conditions and subject to accelerated vesting in certain circumstances, the number of units that actually vest at the end of the three-year performance period will be 0% to 250% of the scheduled amount, depending on the extent to which the Issuer meets or exceeds certain performance goals at the end of each year during the performance period. The maximum number of units that may vest at the end of the three-year performance period is 6,440 (250% of the target number).

F3 · derivative.expiration_date: Represents an award of performance-based restricted share units. The target number of units is presented in the table. Subject to certain continued employment conditions and subject to accelerated vesting in certain circumstances, the number of units that actually vest at the end of the three-year performance period will be 0% to 250% of the scheduled amount, depending on the extent to which the Issuer meets or exceeds certain performance goals at the end of each year during the performance period. The maximum number of units that may vest at the end of the three-year performance period is 6,440 (250% of the target number).

SEC source: 0001562180-24-001516 · primarydocument.xml · derivative · entry 10

Black Matthew Stephen · CIK 0001544201 · Sr VP Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,577

Underlying: Common Shares · 2,577 shares

Expires not disclosed

F2 · derivative.exercise_date: Represents an award of restricted share units. The award shall vest 25% per year over a four-year period following the date of grant.

F2 · derivative.expiration_date: Represents an award of restricted share units. The award shall vest 25% per year over a four-year period following the date of grant.

SEC source: 0001562180-24-001378 · primarydocument.xml · derivative · entry 4

Black Matthew Stephen · CIK 0001544201 · Sr VP Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Shares · 731 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_date: 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 14, 2020 and contained a performance target that was achieved by the Issuer over the one fiscal year period that ended December 31, 2020. 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 1.

F2 · derivative.expiration_date: 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 14, 2020 and contained a performance target that was achieved by the Issuer over the one fiscal year period that ended December 31, 2020. 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 1.

SEC source: 0001562180-24-001378 · primarydocument.xml · nonDerivative · entry 2

Black Matthew Stephen · CIK 0001544201 · Sr VP Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 32,199

F1 · kind: 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.

SEC source: 0001562180-24-001378 · primarydocument.xml · nonDerivative · entry 1

Black Matthew Stephen · CIK 0001544201 · Sr VP Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 32,377

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001562180-24-000094 · primarydocument.xml · nonDerivative · entry 1

Black Matthew Stephen · CIK 0001544201 · Sr VP Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 31,646

F1 · kind: These shares were acquired under the Waste Connections, Inc. 2020 Employee Share Purchase Plan ("ESPP"), for the offering period of July 1, 2023 to December 31, 2023. In accordance with the ESPP, these shares were acquired at a price equal to 95% of the closing price of the shares on the New York Stock Exchange on December 29, 2023.

SEC source: 0001562180-23-005694 · primarydocument.xml · nonDerivative · entry 1

Black Matthew Stephen · CIK 0001544201 · Sr VP Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 31,632

F1 · kind: These shares were acquired under the Waste Connections, Inc. 2020 Employee Share Purchase Plan ("ESPP"), for the offering period of January 1, 2023 to June 30, 2023. In accordance with the ESPP, these shares were acquired at a price equal to 95% of the closing price of the shares on the New York Stock Exchange on June 30, 2023.

SEC source: 0001562180-23-001663 · primarydocument.xml · derivative · entry 8

Black Matthew Stephen · CIK 0001544201 · Sr VP Chief Accounting Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,916

Underlying: Common Shares · 959 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F5 · derivative.exercise_date: Represents the conversion upon vesting of restricted share units into common shares of the Issuer. The restricted share units were awarded on February 19, 2021 and vest in four equal annual installments. The common shares are reported in Table 1.

F5 · derivative.expiration_date: Represents the conversion upon vesting of restricted share units into common shares of the Issuer. The restricted share units were awarded on February 19, 2021 and vest in four equal annual installments. The common shares are reported in Table 1.

SEC source: 0001562180-23-001663 · primarydocument.xml · nonDerivative · entry 4

Black Matthew Stephen · CIK 0001544201 · Sr VP Chief Accounting Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 31,618

F1 · kind: 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.

SEC source: 0001562180-23-001663 · primarydocument.xml · nonDerivative · entry 3

Black Matthew Stephen · CIK 0001544201 · Sr VP Chief Accounting Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 31,852

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001562180-23-001663 · primarydocument.xml · derivative · entry 7

Black Matthew Stephen · CIK 0001544201 · Sr VP Chief Accounting Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 2,411

Underlying: Common Shares · 804 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F4 · derivative.exercise_date: Represents the conversion upon vesting of restricted share units into common shares of the Issuer. The restricted share units were awarded on February 18, 2022 and vest in four equal annual installments. The common shares are reported in Table 1.

F4 · derivative.expiration_date: Represents the conversion upon vesting of restricted share units into common shares of the Issuer. The restricted share units were awarded on February 18, 2022 and vest in four equal annual installments. The common shares are reported in Table 1.

SEC source: 0001562180-23-001663 · primarydocument.xml · nonDerivative · entry 2

Black Matthew Stephen · CIK 0001544201 · Sr VP Chief Accounting Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 30,893

F1 · kind: 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.

SEC source: 0001562180-23-001663 · primarydocument.xml · nonDerivative · entry 1

Black Matthew Stephen · CIK 0001544201 · Sr VP Chief Accounting Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 31,089

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001562180-23-001663 · primarydocument.xml · derivative · entry 6

Black Matthew Stephen · CIK 0001544201 · Sr VP Chief Accounting Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 3,172

Underlying: Common Shares · 3,172 shares

Expires not disclosed

F3 · derivative.exercise_date: Represents an award of performance-based restricted share units. The target number of units is presented in the table. Subject to certain continued employment conditions and subject to accelerated vesting in certain circumstances, the number of units that actually vest at the end of the three-year performance period will be 0% to 250% of the scheduled amount, depending on the extent to which the Issuer meets or exceeds certain performance goals at the end of each year during the performance period. The maximum number of units that may vest at the end of the three-year performance period is 7,930 (250% of the target number).

F3 · derivative.expiration_date: Represents an award of performance-based restricted share units. The target number of units is presented in the table. Subject to certain continued employment conditions and subject to accelerated vesting in certain circumstances, the number of units that actually vest at the end of the three-year performance period will be 0% to 250% of the scheduled amount, depending on the extent to which the Issuer meets or exceeds certain performance goals at the end of each year during the performance period. The maximum number of units that may vest at the end of the three-year performance period is 7,930 (250% of the target number).

SEC source: 0001562180-23-001663 · primarydocument.xml · derivative · entry 5

Black Matthew Stephen · CIK 0001544201 · Sr VP Chief Accounting Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 3,172

Underlying: Common Shares · 3,172 shares

Expires not disclosed

F2 · derivative.exercise_date: Represents an award of restricted share units. The award shall vest 25% per year over a four-year period following the date of grant.

F2 · derivative.expiration_date: Represents an award of restricted share units. The award shall vest 25% per year over a four-year period following the date of grant.

SEC source: 0001562180-23-001497 · primarydocument.xml · derivative · entry 3

Black Matthew Stephen · CIK 0001544201 · Sr VP Chief Accounting Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Shares · 695 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_date: 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 15, 2019 and contained a performance target that was achieved by the Issuer over the one fiscal year period that ended December 31, 2019. 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 1.

F2 · derivative.expiration_date: 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 15, 2019 and contained a performance target that was achieved by the Issuer over the one fiscal year period that ended December 31, 2019. 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 1.

SEC source: 0001562180-23-001497 · primarydocument.xml · nonDerivative · entry 2

Black Matthew Stephen · CIK 0001544201 · Sr VP Chief Accounting Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 30,285

F1 · kind: 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.

SEC source: 0001562180-23-001497 · primarydocument.xml · nonDerivative · entry 1

Black Matthew Stephen · CIK 0001544201 · Sr VP Chief Accounting Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 30,455

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001562180-23-001454 · primarydocument.xml · derivative · entry 6

Black Matthew Stephen · CIK 0001544201 · Sr VP Chief Accounting Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 731

Underlying: Common Shares · 732 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · derivative.exercise_date: 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 14, 2020 and contained a performance target that was achieved by the Issuer over the one fiscal year period that ended December 31, 2020. 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 1.

F3 · derivative.expiration_date: 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 14, 2020 and contained a performance target that was achieved by the Issuer over the one fiscal year period that ended December 31, 2020. 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 1.

SEC source: 0001562180-23-001454 · primarydocument.xml · derivative · entry 5

Black Matthew Stephen · CIK 0001544201 · Sr VP Chief Accounting Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Shares · 3,832 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_date: Represents the conversion upon vesting of a performance-based restricted share unit award into common shares of the Issuer. The award was granted on February 14, 2020 and contained performance goals that the Issuer achieved over the three-year performance period from January 1, 2020 to December 31, 2022. The number of earned award units that vested at the end of the three-year performance period, as determined by the Compensation Committee of the Issuer's Board of Directors, was 131% of the target number of shares subject to the award. The common shares are reported on Table 1.

F2 · derivative.expiration_date: Represents the conversion upon vesting of a performance-based restricted share unit award into common shares of the Issuer. The award was granted on February 14, 2020 and contained performance goals that the Issuer achieved over the three-year performance period from January 1, 2020 to December 31, 2022. The number of earned award units that vested at the end of the three-year performance period, as determined by the Compensation Committee of the Issuer's Board of Directors, was 131% of the target number of shares subject to the award. The common shares are reported on Table 1.

SEC source: 0001562180-23-001454 · primarydocument.xml · nonDerivative · entry 4

Black Matthew Stephen · CIK 0001544201 · Sr VP Chief Accounting Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 29,760

F1 · kind: 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.

SEC source: 0001562180-23-001454 · primarydocument.xml · nonDerivative · entry 3

Black Matthew Stephen · CIK 0001544201 · Sr VP Chief Accounting Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 29,939

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001562180-23-001454 · primarydocument.xml · nonDerivative · entry 2

Black Matthew Stephen · CIK 0001544201 · Sr VP Chief Accounting Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 29,207

F1 · kind: 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.

SEC source: 0001562180-23-001454 · primarydocument.xml · nonDerivative · entry 1

Black Matthew Stephen · CIK 0001544201 · Sr VP Chief Accounting Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 30,179

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001562180-23-000114 · primarydocument.xml · nonDerivative · entry 1

Black Matthew Stephen · CIK 0001544201 · Sr. Vice President - Tax

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 26,347

F1 · kind: These shares were acquired under the Waste Connections, Inc. 2020 Employee Share Purchase Plan ("ESPP"), for the offering period of July 1, 2022 to December 31, 2022. In accordance with the ESPP, these shares were acquired at a price equal to 95% of the closing price of the shares on the New York Stock Exchange on December 30, 2022.

SEC source: 0001562180-22-005980 · primarydocument.xml · nonDerivative · entry 1

Black Matthew Stephen · CIK 0001544201 · Sr. Vice President - Tax

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 26,333

F1 · price: This transaction was executed in multiple trades at prices ranging from $137.84 USD to $138.52 USD; the price reported above reflects the weighted average sale price.

SEC source: 0001562180-22-005510 · primarydocument.xml · nonDerivative · entry 2

Black Matthew Stephen · CIK 0001544201 · Sr. Vice President - Tax

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 34,833

F1 · kind: These shares were acquired under the Waste Connections, Inc. 2020 Employee Share Purchase Plan ("ESPP"), for the offering period of January 1, 2022 to June 30, 2022. In accordance with the ESPP, these shares were acquired at a price equal to 95% of the closing price of the shares on the New York Stock Exchange on June 30, 2022.

SEC source: 0001562180-22-005510 · primarydocument.xml · nonDerivative · entry 1

Black Matthew Stephen · CIK 0001544201 · Sr. Vice President - Tax

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 34,817

SEC source: 0001562180-22-001768 · primarydocument.xml · derivative · entry 8

Black Matthew Stephen · CIK 0001544201 · Sr. Vice President - Tax

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Shares · 1,046 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F5 · derivative.exercise_date: 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 20, 2018 and contained a performance target that was achieved by the Issuer over the one fiscal year period that ended December 31, 2018. 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.

F5 · derivative.expiration_date: 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 20, 2018 and contained a performance target that was achieved by the Issuer over the one fiscal year period that ended December 31, 2018. 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.

SEC source: 0001562180-22-001768 · primarydocument.xml · nonDerivative · entry 4

Black Matthew Stephen · CIK 0001544201 · Sr. Vice President - Tax

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 34,938

F1 · kind: 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.

SEC source: 0001562180-22-001768 · primarydocument.xml · nonDerivative · entry 3

Black Matthew Stephen · CIK 0001544201 · Sr. Vice President - Tax

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 35,193

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001562180-22-001768 · primarydocument.xml · derivative · entry 7

Black Matthew Stephen · CIK 0001544201 · Sr. Vice President - Tax

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 2,875

Underlying: Common Shares · 958 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F4 · derivative.exercise_date: Represents the conversion upon vesting of restricted share units into common shares of the Issuer. The restricted share units were awarded on February 19, 2021 and vest in four equal annual installments. The common shares are reported in Table 1.

F4 · derivative.expiration_date: Represents the conversion upon vesting of restricted share units into common shares of the Issuer. The restricted share units were awarded on February 19, 2021 and vest in four equal annual installments. The common shares are reported in Table 1.

SEC source: 0001562180-22-001768 · primarydocument.xml · nonDerivative · entry 2

Black Matthew Stephen · CIK 0001544201 · Sr. Vice President - Tax

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 34,147

F1 · kind: 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.

SEC source: 0001562180-22-001768 · primarydocument.xml · nonDerivative · entry 1

Black Matthew Stephen · CIK 0001544201 · Sr. Vice President - Tax

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 34,381

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001562180-22-001768 · primarydocument.xml · derivative · entry 6

Black Matthew Stephen · CIK 0001544201 · Sr. Vice President - Tax

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 3,215

Underlying: Common Shares · 3,215 shares

Expires not disclosed

F3 · derivative.exercise_date: Represents an award of restricted share units. The award shall vest 25% per year over a four-year period following the date of grant.

F3 · derivative.expiration_date: Represents an award of restricted share units. The award shall vest 25% per year over a four-year period following the date of grant.

SEC source: 0001562180-22-001768 · primarydocument.xml · derivative · entry 5

Black Matthew Stephen · CIK 0001544201 · Sr. Vice President - Tax

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 3,215

Underlying: Common Shares · 3,215 shares

Expires not disclosed

F2 · derivative.exercise_date: Represents an award of performance-based restricted share units. The target number of units is presented in the table. Subject to certain continued employment conditions and subject to accelerated vesting in certain circumstances, the number of units that actually vest at the end of the three-year performance period will be 0% to 250% of the scheduled amount, depending on the extent to which the Issuer meets or exceeds certain performance goals at the end of each year during the performance period. The maximum number of units that may vest at the end of the three-year performance period is 8,037 (250% of the target number).

F2 · derivative.expiration_date: Represents an award of performance-based restricted share units. The target number of units is presented in the table. Subject to certain continued employment conditions and subject to accelerated vesting in certain circumstances, the number of units that actually vest at the end of the three-year performance period will be 0% to 250% of the scheduled amount, depending on the extent to which the Issuer meets or exceeds certain performance goals at the end of each year during the performance period. The maximum number of units that may vest at the end of the three-year performance period is 8,037 (250% of the target number).

SEC source: 0001562180-22-001513 · primarydocument.xml · derivative · entry 6

Black Matthew Stephen · CIK 0001544201 · Sr. Vice President - Tax

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 695

Underlying: Common Shares · 696 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · derivative.exercise_date: 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 15, 2019 and contained a performance target that was achieved by the Issuer over the one fiscal year period that ended December 31, 2019. 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 1.

F3 · derivative.expiration_date: 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 15, 2019 and contained a performance target that was achieved by the Issuer over the one fiscal year period that ended December 31, 2019. 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 1.

SEC source: 0001562180-22-001513 · primarydocument.xml · nonDerivative · entry 4

Black Matthew Stephen · CIK 0001544201 · Sr. Vice President - Tax

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 33,423

F1 · kind: 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.

SEC source: 0001562180-22-001513 · primarydocument.xml · nonDerivative · entry 3

Black Matthew Stephen · CIK 0001544201 · Sr. Vice President - Tax

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 33,591

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001562180-22-001513 · primarydocument.xml · derivative · entry 5

Black Matthew Stephen · CIK 0001544201 · Sr. Vice President - Tax

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,463

Underlying: Common Shares · 731 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_date: 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 14, 2020 and contained a performance target that was achieved by the Issuer over the one fiscal year period that ended December 31, 2020. 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 1.

F2 · derivative.expiration_date: 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 14, 2020 and contained a performance target that was achieved by the Issuer over the one fiscal year period that ended December 31, 2020. 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 1.

SEC source: 0001562180-22-001513 · primarydocument.xml · nonDerivative · entry 2

Black Matthew Stephen · CIK 0001544201 · Sr. Vice President - Tax

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 32,895

F1 · kind: 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.

SEC source: 0001562180-22-001513 · primarydocument.xml · nonDerivative · entry 1

Black Matthew Stephen · CIK 0001544201 · Sr. Vice President - Tax

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 33,112

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001562180-22-000081 · primarydocument.xml · nonDerivative · entry 1

Black Matthew Stephen · CIK 0001544201 · Sr. Vice President - Tax

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 32,381

F1 · kind: These shares were acquired under the Waste Connections, Inc. 2020 Employee Share Purchase Plan ("ESPP"), for the offering period of July 1, 2021 to December 31, 2021. In accordance with the ESPP, these shares were acquired at a price equal to 95% of the closing price of the shares on the New York Stock Exchange on December 31, 2021.

SEC source: 0001562180-21-004711 · primarydocument.xml · nonDerivative · entry 1

Black Matthew Stephen · CIK 0001544201 · Sr. Vice President - Tax

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 32,368

F1 · kind: These shares were acquired under the Waste Connections, Inc. 2020 Employee Share Purchase Plan ("ESPP"), for the offering period of January 1, 2021 to June 30, 2021. In accordance with the ESPP, these shares were acquired at a price equal to 95% of the closing price of the shares on the New York Stock Exchange on June 30, 2021.

SEC source: 0001562180-21-001618 · primarydocument.xml · derivative · entry 3

Black Matthew Stephen · CIK 0001544201 · Sr. Vice President - Tax

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Shares · 1,207 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_date: 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.

F2 · derivative.expiration_date: 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.

SEC source: 0001562180-21-001618 · primarydocument.xml · nonDerivative · entry 2

Black Matthew Stephen · CIK 0001544201 · Sr. Vice President - Tax

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 32,353

F1 · kind: 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.

SEC source: 0001562180-21-001618 · primarydocument.xml · nonDerivative · entry 1

Black Matthew Stephen · CIK 0001544201 · Sr. Vice President - Tax

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 32,647

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.