PAA

SEC source: 0001062993-25-014616 · form4.xml · nonDerivative · entry 1

Chandler Chris R. · CIK 0001769245 · EVP & COO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 583,569

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: 0001062993-25-014614 · form4.xml · derivative · entry 6

Chiang Willie CW · CIK 0001421559 · Director · Chairman & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 500,000

Underlying: Common Units · 500,000 shares

Expires not disclosed

F6 · security: The expiration date of these outstanding phantom units has been extended from October 2025 to October 2030, resulting in the deemed cancellation of the original phantom units and deemed grant under the Long-Term Incentive Plan of replacement phantom units described in footnote 7 below. The original phantom units were granted in August 2018. The phantom units include associated DERs payable in cash.

F2 · derivative.exercise_price: One common unit is deliverable, upon vesting, for each Phantom Unit that vests.

F7 · derivative.exercise_date: Although the expiration date of the original phantom units has been extended from Oct. 2025 to Oct. 2030, the other vesting terms remain the same. The phantom units will vest (i) 25% on the first distribution date on which PAA has generated DCF per common unit (DCF/CU) of at least $3.00 on a trailing four quarter basis (TFQB), and (ii) 75% on the first distribution date on which PAA has generated DCF/CU of at least $3.50 on a TFQB. DERs associated with these phantom units have vested or will vest as follows: (i) 1/3 vested on the May 2019 distribution date, (ii) 1/3 will vest on the first distribution date on which PAA generates DCF/CU of at least $2.60 on a TFQB, and (iii) 1/3 will vest on the first distribution date on which PAA generates DCF/CU of at least $2.80 on a TFQB. The phantom units and associated DERs also vest upon termination of employment under certain circumstances. Any phantom units and associated DERs that have not vested by 10-1-2030 will expire at that time.

F7 · derivative.expiration_date: Although the expiration date of the original phantom units has been extended from Oct. 2025 to Oct. 2030, the other vesting terms remain the same. The phantom units will vest (i) 25% on the first distribution date on which PAA has generated DCF per common unit (DCF/CU) of at least $3.00 on a trailing four quarter basis (TFQB), and (ii) 75% on the first distribution date on which PAA has generated DCF/CU of at least $3.50 on a TFQB. DERs associated with these phantom units have vested or will vest as follows: (i) 1/3 vested on the May 2019 distribution date, (ii) 1/3 will vest on the first distribution date on which PAA generates DCF/CU of at least $2.60 on a TFQB, and (iii) 1/3 will vest on the first distribution date on which PAA generates DCF/CU of at least $2.80 on a TFQB. The phantom units and associated DERs also vest upon termination of employment under certain circumstances. Any phantom units and associated DERs that have not vested by 10-1-2030 will expire at that time.

SEC source: 0001062993-25-014614 · form4.xml · derivative · entry 5

Chiang Willie CW · CIK 0001421559 · Director · Chairman & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Units · 500,000 shares

Expires not disclosed

F6 · security: The expiration date of these outstanding phantom units has been extended from October 2025 to October 2030, resulting in the deemed cancellation of the original phantom units and deemed grant under the Long-Term Incentive Plan of replacement phantom units described in footnote 7 below. The original phantom units were granted in August 2018. The phantom units include associated DERs payable in cash.

F2 · derivative.exercise_price: One common unit is deliverable, upon vesting, for each Phantom Unit that vests.

F7 · derivative.exercise_date: Although the expiration date of the original phantom units has been extended from Oct. 2025 to Oct. 2030, the other vesting terms remain the same. The phantom units will vest (i) 25% on the first distribution date on which PAA has generated DCF per common unit (DCF/CU) of at least $3.00 on a trailing four quarter basis (TFQB), and (ii) 75% on the first distribution date on which PAA has generated DCF/CU of at least $3.50 on a TFQB. DERs associated with these phantom units have vested or will vest as follows: (i) 1/3 vested on the May 2019 distribution date, (ii) 1/3 will vest on the first distribution date on which PAA generates DCF/CU of at least $2.60 on a TFQB, and (iii) 1/3 will vest on the first distribution date on which PAA generates DCF/CU of at least $2.80 on a TFQB. The phantom units and associated DERs also vest upon termination of employment under certain circumstances. Any phantom units and associated DERs that have not vested by 10-1-2030 will expire at that time.

F7 · derivative.expiration_date: Although the expiration date of the original phantom units has been extended from Oct. 2025 to Oct. 2030, the other vesting terms remain the same. The phantom units will vest (i) 25% on the first distribution date on which PAA has generated DCF per common unit (DCF/CU) of at least $3.00 on a trailing four quarter basis (TFQB), and (ii) 75% on the first distribution date on which PAA has generated DCF/CU of at least $3.50 on a TFQB. DERs associated with these phantom units have vested or will vest as follows: (i) 1/3 vested on the May 2019 distribution date, (ii) 1/3 will vest on the first distribution date on which PAA generates DCF/CU of at least $2.60 on a TFQB, and (iii) 1/3 will vest on the first distribution date on which PAA generates DCF/CU of at least $2.80 on a TFQB. The phantom units and associated DERs also vest upon termination of employment under certain circumstances. Any phantom units and associated DERs that have not vested by 10-1-2030 will expire at that time.

SEC source: 0001062993-25-014614 · form4.xml · derivative · entry 4

Chiang Willie CW · CIK 0001421559 · Director · Chairman & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 417,350

Underlying: Common Units · 417,350 shares

Expires not disclosed

F1 · security: Phantom Units granted under Long-Term Incentive Plan (includes distribution equivalent rights ("DER") payable in cash).

F2 · derivative.exercise_price: One common unit is deliverable, upon vesting, for each Phantom Unit that vests.

F3 · derivative.exercise_date: These phantom units will vest as follows: (a) Tranche 1, consisting of 208,675 phantom units, will vest on the August 2028 distribution date assuming continued service through such date; (b) Tranche 2, consisting of 104,337 phantom units (assuming 100% payout at target), will potentially vest on the August 2028 distribution date at a scaled payout range of between 0% to 200% based on PAA's total shareholder return (TSR) over the three-year period ending June 30, 2028 compared to the TSR of a selected peer group (payout based on numeric rank with 100% earned at median and interpolation between ranks, and with payout being subject to reduction by up to 25 basis points, but not below 100%, if actual TSR is negative); and

F4 · derivative.exercise_date: (c) Tranche 3, consisting of 104,338 phantom units (assuming 100% payout at target), will potentially vest on the Aug. 2028 distribution date at a scaled payout range of between 0% and 200% based on PAA achieving cumul. distributable cash flow (DCF) per common unit equivalent (CUE) of $8.40 over the 3-year period ending 6/30/28 (with payout equaling 100% at cumul. DCF/CUE over such period of $8.40 and being equal to 0% for cumul. DCF/CUE over such period of $7.56 or lower and 200% for cumul. DCF/CUE over such period of $9.24 or higher, with interpolation btw. such points, and with payout being subject to reduction by 25 basis pts. if PAA's leverage ratio (long term debt to adj. EBITDA as calculated pursuant to PAA's sr. unsecured revolving credit facility) as of 6/30/28 is greater than the leverage ratio that equals the upper end of our then applicable non-rating agency target leverage ratio range.

F5 · derivative.exercise_date: DERs associated with Tranche 1 will accrue for the first year and be paid in cash in a lump sum on the August 2026 distribution date; beginning in November 2026, DERs associated with Tranche 1 will be paid quarterly until the phantom units vest or terminate. DERs associated with Tranches 2 and 3 will accrue during the three-year vesting period and be paid in cash in a lump sum on the August 2026 distribution date with respect to each phantom unit that vests, if any, on such date. Any Tranche 2 or Tranche 3 phantom units that are determined to not have vested as of the August 2028 distribution date shall expire as of such date.

F3 · derivative.expiration_date: These phantom units will vest as follows: (a) Tranche 1, consisting of 208,675 phantom units, will vest on the August 2028 distribution date assuming continued service through such date; (b) Tranche 2, consisting of 104,337 phantom units (assuming 100% payout at target), will potentially vest on the August 2028 distribution date at a scaled payout range of between 0% to 200% based on PAA's total shareholder return (TSR) over the three-year period ending June 30, 2028 compared to the TSR of a selected peer group (payout based on numeric rank with 100% earned at median and interpolation between ranks, and with payout being subject to reduction by up to 25 basis points, but not below 100%, if actual TSR is negative); and

F4 · derivative.expiration_date: (c) Tranche 3, consisting of 104,338 phantom units (assuming 100% payout at target), will potentially vest on the Aug. 2028 distribution date at a scaled payout range of between 0% and 200% based on PAA achieving cumul. distributable cash flow (DCF) per common unit equivalent (CUE) of $8.40 over the 3-year period ending 6/30/28 (with payout equaling 100% at cumul. DCF/CUE over such period of $8.40 and being equal to 0% for cumul. DCF/CUE over such period of $7.56 or lower and 200% for cumul. DCF/CUE over such period of $9.24 or higher, with interpolation btw. such points, and with payout being subject to reduction by 25 basis pts. if PAA's leverage ratio (long term debt to adj. EBITDA as calculated pursuant to PAA's sr. unsecured revolving credit facility) as of 6/30/28 is greater than the leverage ratio that equals the upper end of our then applicable non-rating agency target leverage ratio range.

F5 · derivative.expiration_date: DERs associated with Tranche 1 will accrue for the first year and be paid in cash in a lump sum on the August 2026 distribution date; beginning in November 2026, DERs associated with Tranche 1 will be paid quarterly until the phantom units vest or terminate. DERs associated with Tranches 2 and 3 will accrue during the three-year vesting period and be paid in cash in a lump sum on the August 2026 distribution date with respect to each phantom unit that vests, if any, on such date. Any Tranche 2 or Tranche 3 phantom units that are determined to not have vested as of the August 2028 distribution date shall expire as of such date.

SEC source: 0001062993-25-014614 · form4.xml · derivative · entry 3

Chiang Willie CW · CIK 0001421559 · Director · Chairman & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Units · 561,055 shares

Expires 2025-08-14

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.

F1 · security: Phantom Units granted under Long-Term Incentive Plan (includes distribution equivalent rights ("DER") payable in cash).

F2 · derivative.exercise_price: One common unit is deliverable, upon vesting, for each Phantom Unit that vests.

SEC source: 0001062993-25-014614 · form4.xml · nonDerivative · entry 2

Chiang Willie CW · CIK 0001421559 · Director · Chairman & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,186,791

SEC source: 0001062993-25-014614 · form4.xml · nonDerivative · entry 1

Chiang Willie CW · CIK 0001421559 · Director · Chairman & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,407,567

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: 0001062993-25-014612 · form4.xml · derivative · entry 4

Swanson Al · CIK 0001292270 · EVP & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 108,850

Underlying: Common Units · 108,850 shares

Expires not disclosed

F1 · security: Phantom Units granted under Long-Term Incentive Plan (includes distribution equivalent rights payable in cash).

F2 · derivative.exercise_price: One common unit is deliverable, upon vesting, for each Phantom Unit that vests.

F3 · derivative.exercise_date: These phantom units will vest as follows: (a) Tranche 1, consisting of 54,425 phantom units, will vest on the August 2028 distribution date assuming continued service through such date; (b) Tranche 2, consisting of 27,212 phantom units (assuming 100% payout at target), will potentially vest on the August 2028 distribution date at a scaled payout range of between 0% to 200% based on PAA's total shareholder return (TSR) over the three-year period ending June 30, 2028 compared to the TSR of a selected peer group (payout based on numeric rank with 100% earned at median and interpolation between ranks, and with payout being subject to reduction by up to 25 basis points, but not below 100%, if actual TSR is negative); and

F4 · derivative.exercise_date: (c) Tranche 3, consisting of 27,213 phantom units (assuming 100% payout at target), will potentially vest on the Aug. 2028 distribution date at a scaled payout range of between 0% and 200% based on PAA achieving cumul. distributable cash flow (DCF) per common unit equivalent (CUE) of $8.40 over the 3-year period ending 6/30/28 (with payout equaling 100% at cumul. DCF/CUE over such period of $8.40 and being equal to 0% for cumul. DCF/CUE over such period of $7.56 or lower and 200% for cumul. DCF/CUE over such period of $9.24 or higher, with interpolation btw. such points, and with payout being subject to reduction by 25 basis pts. if PAA's leverage ratio (long term debt to adj. EBITDA as calculated pursuant to PAA's sr. unsecured revolving credit facility) as of 6/30/28 is greater than the leverage ratio that equals the upper end of our then applicable non-rating agency target leverage ratio range.

F5 · derivative.exercise_date: DERs associated with Tranche 1 will accrue for the first year and be paid in cash in a lump sum on the August 2026 distribution date; beginning in November 2026, DERs associated with Tranche 1 will be paid quarterly until the phantom units vest or terminate. DERs associated with Tranches 2 and 3 will accrue during the three-year vesting period and be paid in cash in a lump sum on the August 2028 distribution date with respect to each phantom unit that vests, if any, on such date. Any Tranche 2 or Tranche 3 phantom units that are determined to not have vested as of the August 2028 distribution date shall expire as of such date.

F3 · derivative.expiration_date: These phantom units will vest as follows: (a) Tranche 1, consisting of 54,425 phantom units, will vest on the August 2028 distribution date assuming continued service through such date; (b) Tranche 2, consisting of 27,212 phantom units (assuming 100% payout at target), will potentially vest on the August 2028 distribution date at a scaled payout range of between 0% to 200% based on PAA's total shareholder return (TSR) over the three-year period ending June 30, 2028 compared to the TSR of a selected peer group (payout based on numeric rank with 100% earned at median and interpolation between ranks, and with payout being subject to reduction by up to 25 basis points, but not below 100%, if actual TSR is negative); and

F4 · derivative.expiration_date: (c) Tranche 3, consisting of 27,213 phantom units (assuming 100% payout at target), will potentially vest on the Aug. 2028 distribution date at a scaled payout range of between 0% and 200% based on PAA achieving cumul. distributable cash flow (DCF) per common unit equivalent (CUE) of $8.40 over the 3-year period ending 6/30/28 (with payout equaling 100% at cumul. DCF/CUE over such period of $8.40 and being equal to 0% for cumul. DCF/CUE over such period of $7.56 or lower and 200% for cumul. DCF/CUE over such period of $9.24 or higher, with interpolation btw. such points, and with payout being subject to reduction by 25 basis pts. if PAA's leverage ratio (long term debt to adj. EBITDA as calculated pursuant to PAA's sr. unsecured revolving credit facility) as of 6/30/28 is greater than the leverage ratio that equals the upper end of our then applicable non-rating agency target leverage ratio range.

F5 · derivative.expiration_date: DERs associated with Tranche 1 will accrue for the first year and be paid in cash in a lump sum on the August 2026 distribution date; beginning in November 2026, DERs associated with Tranche 1 will be paid quarterly until the phantom units vest or terminate. DERs associated with Tranches 2 and 3 will accrue during the three-year vesting period and be paid in cash in a lump sum on the August 2028 distribution date with respect to each phantom unit that vests, if any, on such date. Any Tranche 2 or Tranche 3 phantom units that are determined to not have vested as of the August 2028 distribution date shall expire as of such date.

SEC source: 0001062993-25-014612 · form4.xml · derivative · entry 3

Swanson Al · CIK 0001292270 · EVP & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Units · 176,731 shares

Expires 2025-08-14

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.

F1 · security: Phantom Units granted under Long-Term Incentive Plan (includes distribution equivalent rights payable in cash).

F2 · derivative.exercise_price: One common unit is deliverable, upon vesting, for each Phantom Unit that vests.

SEC source: 0001062993-25-014612 · form4.xml · nonDerivative · entry 2

Swanson Al · CIK 0001292270 · EVP & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 601,901

SEC source: 0001062993-25-014612 · form4.xml · nonDerivative · entry 1

Swanson Al · CIK 0001292270 · EVP & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 671,445

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: 0001062993-25-014607 · form4.xml · derivative · entry 4

McGee Richard K. · CIK 0001490023 · EVP, General Counsel & Sec.

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 122,650

Underlying: Common Units · 122,650 shares

Expires not disclosed

F1 · security: Phantom Units granted under Long-Term Incentive Plan (includes distribution equivalent rights payable in cash).

F2 · derivative.exercise_price: One common unit is deliverable, upon vesting, for each Phantom Unit that vests.

F3 · derivative.exercise_date: These phantom units will vest as follows: (a) Tranche 1, consisting of 56,325 phantom units, will vest on the August 2028 distribution date assuming continued service through such date; (b) Tranche 2, consisting of 28,162 phantom units (assuming 100% payout at target), will potentially vest on the August 2028 distribution date at a scaled payout range of between 0% to 200% based on PAA's total shareholder return (TSR) over the three-year period ending June 30, 2028 compared to the TSR of a selected peer group (payout based on numeric rank with 100% earned at median and interpolation between ranks, and with payout being subject to reduction by up to 25 basis points, but not below 100%, if actual TSR is negative); and

F4 · derivative.exercise_date: (c) Tranche 3, consisting of 28,163 phantom units (assuming 100% payout at target), will potentially vest on the Aug. 2028 distribution date at a scaled payout range of between 0% and 200% based on PAA achieving cumul. distributable cash flow (DCF) per common unit equivalent (CUE) of $8.40 over the 3-year period ending 6/30/28 (with payout equaling 100% at cumul. DCF/CUE over such period of $8.40 and being equal to 0% for cumul. DCF/CUE over such period of $7.56 or lower and 200% for cumul. DCF/CUE over such period of $9.24 or higher, with interpolation btw. such points, and with payout being subject to reduction by 25 basis pts. if PAA's leverage ratio (long term debt to adj. EBITDA as calculated pursuant to PAA's sr. unsecured revolving credit facility) as of 6/30/28 is greater than the leverage ratio that equals the upper end of our then applicable non-rating agency target leverage ratio range.

F5 · derivative.exercise_date: DERs associated with Tranche 1 will accrue for the first year and be paid in cash in a lump sum on the August 2026 distribution date; beginning in November 2026, DERs associated with Tranche 1 will be paid quarterly until the phantom units vest or terminate. DERs associated with Tranches 2 and 3 will accrue during the three-year vesting period and be paid in cash in a lump sum on the August 2028 distribution date with respect to each phantom unit that vests, if any, on such date. Any Tranche 2 or Tranche 3 phantom units that are determined to not have vested as of the August 2028 distribution date shall expire as of such date.

F3 · derivative.expiration_date: These phantom units will vest as follows: (a) Tranche 1, consisting of 56,325 phantom units, will vest on the August 2028 distribution date assuming continued service through such date; (b) Tranche 2, consisting of 28,162 phantom units (assuming 100% payout at target), will potentially vest on the August 2028 distribution date at a scaled payout range of between 0% to 200% based on PAA's total shareholder return (TSR) over the three-year period ending June 30, 2028 compared to the TSR of a selected peer group (payout based on numeric rank with 100% earned at median and interpolation between ranks, and with payout being subject to reduction by up to 25 basis points, but not below 100%, if actual TSR is negative); and

F4 · derivative.expiration_date: (c) Tranche 3, consisting of 28,163 phantom units (assuming 100% payout at target), will potentially vest on the Aug. 2028 distribution date at a scaled payout range of between 0% and 200% based on PAA achieving cumul. distributable cash flow (DCF) per common unit equivalent (CUE) of $8.40 over the 3-year period ending 6/30/28 (with payout equaling 100% at cumul. DCF/CUE over such period of $8.40 and being equal to 0% for cumul. DCF/CUE over such period of $7.56 or lower and 200% for cumul. DCF/CUE over such period of $9.24 or higher, with interpolation btw. such points, and with payout being subject to reduction by 25 basis pts. if PAA's leverage ratio (long term debt to adj. EBITDA as calculated pursuant to PAA's sr. unsecured revolving credit facility) as of 6/30/28 is greater than the leverage ratio that equals the upper end of our then applicable non-rating agency target leverage ratio range.

F5 · derivative.expiration_date: DERs associated with Tranche 1 will accrue for the first year and be paid in cash in a lump sum on the August 2026 distribution date; beginning in November 2026, DERs associated with Tranche 1 will be paid quarterly until the phantom units vest or terminate. DERs associated with Tranches 2 and 3 will accrue during the three-year vesting period and be paid in cash in a lump sum on the August 2028 distribution date with respect to each phantom unit that vests, if any, on such date. Any Tranche 2 or Tranche 3 phantom units that are determined to not have vested as of the August 2028 distribution date shall expire as of such date.

SEC source: 0001062993-25-014607 · form4.xml · derivative · entry 3

McGee Richard K. · CIK 0001490023 · EVP, General Counsel & Sec.

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Units · 176,731 shares

Expires 2025-08-14

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.

F1 · security: Phantom Units granted under Long-Term Incentive Plan (includes distribution equivalent rights payable in cash).

F2 · derivative.exercise_price: One common unit is deliverable, upon vesting, for each Phantom Unit that vests.

SEC source: 0001062993-25-014607 · form4.xml · nonDerivative · entry 2

McGee Richard K. · CIK 0001490023 · EVP, General Counsel & Sec.

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 606,353

SEC source: 0001062993-25-014607 · form4.xml · nonDerivative · entry 1

McGee Richard K. · CIK 0001490023 · EVP, General Counsel & Sec.

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 675,897

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: 0001062993-25-014596 · form4.xml · nonDerivative · entry 1

PAA GP Holdings LLC · CIK 0001581928 · Director · 10% owner

Plains AAP, L.P. · CIK 0001490401 · Director · 10% owner

Plains All American GP LLC · CIK 0001490402 · Director · 10% owner

PLAINS GP HOLDINGS LP · CIK 0001581990 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · By Plains AAP, L.P.

Disclosed balance after: 233,000,430

F1 · kind: Pursuant to that certain Omnibus Agreement (the "Omnibus Agreement") dated November 15, 2016, by and among PAA GP Holdings LLC ("PAGP GP"), Plains GP Holdings, L.P. ("PAGP"), Plains All American GP LLC ("GP LLC"), Plains AAP, L.P. ("AAP"), PAA GP LLC and Plains All American Pipeline, L.P. ("PAA"), AAP is obligated to issue to PAGP a number of AAP Class A units equal to the number of PAGP Class A shares issued upon vesting of awards under PAGP's long-term incentive plan. The Omnibus Agreement also provides that immediately following such issuance, PAA is obligated to issue to AAP an equivalent number of PAA Common Units. On August 14, 2025, a total of 144,500 PAGP Class A shares were issued in connection with the vesting of outstanding LTIP awards under PAGP's long-term incentive plan. An equal number of AAP Class A units was issued to PAGP and an equal number of PAA Common Units was issued to AAP.

F1 · price: Pursuant to that certain Omnibus Agreement (the "Omnibus Agreement") dated November 15, 2016, by and among PAA GP Holdings LLC ("PAGP GP"), Plains GP Holdings, L.P. ("PAGP"), Plains All American GP LLC ("GP LLC"), Plains AAP, L.P. ("AAP"), PAA GP LLC and Plains All American Pipeline, L.P. ("PAA"), AAP is obligated to issue to PAGP a number of AAP Class A units equal to the number of PAGP Class A shares issued upon vesting of awards under PAGP's long-term incentive plan. The Omnibus Agreement also provides that immediately following such issuance, PAA is obligated to issue to AAP an equivalent number of PAA Common Units. On August 14, 2025, a total of 144,500 PAGP Class A shares were issued in connection with the vesting of outstanding LTIP awards under PAGP's long-term incentive plan. An equal number of AAP Class A units was issued to PAGP and an equal number of PAA Common Units was issued to AAP.

F2 · ownership.nature: PAGP GP is the general partner of PAGP, which is the managing member of GP LLC, which is the general partner of AAP. Each of PAGP GP, PAGP and GP LLC may be deemed to indirectly beneficially own the Common Units directly held by AAP, but disclaim beneficial ownership of such Common Units except to the extent of their respective pecuniary interests therein.

SEC source: 0001070423-26-000002 · form4a.xml · derivative · entry 1

McGee Richard K. · CIK 0001490023 · EVP, General Counsel & Sec.

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 112,650

Underlying: Common Units · 112,650 shares

Expires not disclosed

F1 · security: Phantom Units granted under Long-Term Incentive Plan (includes distribution equivalent rights payable in cash).

F2 · derivative.exercise_price: One common unit is deliverable, upon vesting, for each Phantom Unit that vests.

F3 · shares: The original Form 4 filed on August 18, 2025 inadvertently reported the acquisition of 10,000 more phantom units than were actually acquired; this amendment is being filed to correct the error.

F4 · derivative.exercise_date: These phantom units will vest as follows: (a) Tranche 1, consisting of 56,325 phantom units, will vest on the August 2028 distribution date assuming continued service through such date; (b) Tranche 2, consisting of 28,162 phantom units (assuming 100% payout at target), will potentially vest on the August 2028 distribution date at a scaled payout range of between 0% to 200% based on PAA's total shareholder return (TSR) over the three-year period ending June 30, 2028 compared to the TSR of a selected peer group (payout based on numeric rank with 100% earned at median and interpolation between ranks, and with payout being subject to reduction by up to 25 basis points, but not below 100%, if actual TSR is negative); and

F5 · derivative.exercise_date: (c) Tranche 3, consisting of 28,163 phantom units (assuming 100% payout at target), will potentially vest on the Aug. 2028 distribution date at a scaled payout range of between 0% and 200% based on PAA achieving cumul. distributable cash flow (DCF) per common unit equivalent (CUE) of $8.40 over the 3-year period ending 6/30/28 (with payout equaling 100% at cumul. DCF/CUE over such period of $8.40 and being equal to 0% for cumul. DCF/CUE over such period of $7.56 or lower and 200% for cumul. DCF/CUE over such period of $9.24 or higher, with interpolation btw. such points, and with payout being subject to reduction by 25 basis pts. if PAA's leverage ratio (long term debt to adj. EBITDA as calculated pursuant to PAA's sr. unsecured revolving credit facility) as of 6/30/28 is greater than the leverage ratio that equals the upper end of our then applicable non-rating agency target leverage ratio range.

F6 · derivative.exercise_date: DERs associated with Tranche 1 will accrue for the first year and be paid in cash in a lump sum on the August 2026 distribution date; beginning in November 2026, DERs associated with Tranche 1 will be paid quarterly until the phantom units vest or terminate. DERs associated with Tranches 2 and 3 will accrue during the three-year vesting period and be paid in cash in a lump sum on the August 2028 distribution date with respect to each phantom unit that vests, if any, on such date. Any Tranche 2 or Tranche 3 phantom units that are determined to not have vested as of the August 2028 distribution date shall expire as of such date.

F4 · derivative.expiration_date: These phantom units will vest as follows: (a) Tranche 1, consisting of 56,325 phantom units, will vest on the August 2028 distribution date assuming continued service through such date; (b) Tranche 2, consisting of 28,162 phantom units (assuming 100% payout at target), will potentially vest on the August 2028 distribution date at a scaled payout range of between 0% to 200% based on PAA's total shareholder return (TSR) over the three-year period ending June 30, 2028 compared to the TSR of a selected peer group (payout based on numeric rank with 100% earned at median and interpolation between ranks, and with payout being subject to reduction by up to 25 basis points, but not below 100%, if actual TSR is negative); and

F5 · derivative.expiration_date: (c) Tranche 3, consisting of 28,163 phantom units (assuming 100% payout at target), will potentially vest on the Aug. 2028 distribution date at a scaled payout range of between 0% and 200% based on PAA achieving cumul. distributable cash flow (DCF) per common unit equivalent (CUE) of $8.40 over the 3-year period ending 6/30/28 (with payout equaling 100% at cumul. DCF/CUE over such period of $8.40 and being equal to 0% for cumul. DCF/CUE over such period of $7.56 or lower and 200% for cumul. DCF/CUE over such period of $9.24 or higher, with interpolation btw. such points, and with payout being subject to reduction by 25 basis pts. if PAA's leverage ratio (long term debt to adj. EBITDA as calculated pursuant to PAA's sr. unsecured revolving credit facility) as of 6/30/28 is greater than the leverage ratio that equals the upper end of our then applicable non-rating agency target leverage ratio range.

F6 · derivative.expiration_date: DERs associated with Tranche 1 will accrue for the first year and be paid in cash in a lump sum on the August 2026 distribution date; beginning in November 2026, DERs associated with Tranche 1 will be paid quarterly until the phantom units vest or terminate. DERs associated with Tranches 2 and 3 will accrue during the three-year vesting period and be paid in cash in a lump sum on the August 2028 distribution date with respect to each phantom unit that vests, if any, on such date. Any Tranche 2 or Tranche 3 phantom units that are determined to not have vested as of the August 2028 distribution date shall expire as of such date.

F3 · derivative.underlying_shares: The original Form 4 filed on August 18, 2025 inadvertently reported the acquisition of 10,000 more phantom units than were actually acquired; this amendment is being filed to correct the error.

F3 · balance_after: The original Form 4 filed on August 18, 2025 inadvertently reported the acquisition of 10,000 more phantom units than were actually acquired; this amendment is being filed to correct the error.

SEC source: 0001062993-25-000661 · form4.xml · derivative · entry 1

PETERSEN GARY R · CIK 0001181757 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · By EnCap Flatrock Midstream Fund III, L.P.

Disclosed balance after: 0

Underlying: Common Units · 12,678,560 shares

Expires not disclosed

F1 · derivative.exercise_price: On January 7, 2025, the Issuer entered into a Unit Repurchase Agreement with EnCap Flatrock Midstream Fund III, L.P. ("EFM III"), whereby the Issuer agreed to purchase 12,678,560 Series A Convertible Preferred Units representing limited partner interests in the Issuer (the "Preferred Units") from EFM III. The Preferred Units will be purchased at "par" ($26.25) for a total purchase price of USD $332,812,200, plus accrued unpaid distributions through January 30, 2025 of $10,400,476 (for total consideration of $343,212,676). The transaction is expected to close by the end of January 2025.

F1 · derivative.exercise_date: On January 7, 2025, the Issuer entered into a Unit Repurchase Agreement with EnCap Flatrock Midstream Fund III, L.P. ("EFM III"), whereby the Issuer agreed to purchase 12,678,560 Series A Convertible Preferred Units representing limited partner interests in the Issuer (the "Preferred Units") from EFM III. The Preferred Units will be purchased at "par" ($26.25) for a total purchase price of USD $332,812,200, plus accrued unpaid distributions through January 30, 2025 of $10,400,476 (for total consideration of $343,212,676). The transaction is expected to close by the end of January 2025.

F2 · derivative.expiration_date: The Preferred Units are perpetual in nature and have no expiration date.

F3 · ownership.direct: These securities were directly held by EFM III. Gary R. Petersen was previously deemed the beneficial owner of securities held by EFM III by virtue of being a member of EnCap Partners, LLC, which indirectly controlled EFM III. As the result of an internal reorganization, Mr. Petersen no longer has the power to direct the voting or disposition of the securities held by EFM III and, therefore, is no longer deemed the beneficial owner of such securities. Mr. Petersen disclaims beneficial ownership of the securities held by EFM III.

F3 · ownership.nature: These securities were directly held by EFM III. Gary R. Petersen was previously deemed the beneficial owner of securities held by EFM III by virtue of being a member of EnCap Partners, LLC, which indirectly controlled EFM III. As the result of an internal reorganization, Mr. Petersen no longer has the power to direct the voting or disposition of the securities held by EFM III and, therefore, is no longer deemed the beneficial owner of such securities. Mr. Petersen disclaims beneficial ownership of the securities held by EFM III.

F4 · ownership.nature: In addition, the Reporting Person previously reported beneficial ownership of 12,678,560 Series A Convertible Preferred Units representing limited partner interests in the Issuer that are directly held by EnCap Energy Capital Fund X, L.P. ("EnCap Fund X"). Mr. Petersen was previously deemed the beneficial owner of securities held by EnCap Fund X by virtue of being a member of EnCap Partners, LLC, which indirectly controlled EnCap Fund X. As the result of an internal reorganization, Mr. Petersen no longer has the power to direct the voting or disposition of the securities held by EnCap Fund X and, therefore, is no longer deemed the beneficial owner of such securities. Mr. Petersen disclaims beneficial ownership of the securities held by EnCap Fund X.

SEC source: 0001062993-24-015259 · form4.xml · derivative · entry 4

Herbold Chris · CIK 0001497929 · Sr. VP Finance & CAO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 32,400

Underlying: Common Units · 32,400 shares

Expires not disclosed

F1 · security: Phantom Units granted under Long-Term Incentive Plan (includes distribution equivalent rights payable in cash).

F2 · derivative.exercise_price: One common unit is deliverable, upon vesting, for each Phantom Unit that vests.

F3 · derivative.exercise_date: These phantom units will vest as follows: (a) Tranche 1, consisting of 16,200 phantom units, will vest on the August 2027 distribution date assuming continued service through such date; (b) Tranche 2, consisting of 8,100 phantom units (assuming 100% payout at target), will potentially vest on the August 2027 distribution date at a scaled payout range of between 0% to 200% based on PAA's total shareholder return (TSR) over the three-year period ending June 30, 2027 compared to the TSR of a selected peer group (payout based on numeric rank with 100% earned at median and interpolation between ranks, and with payout being subject to reduction by up to 25 basis points, but not below 100%, if actual TSR is negative); and

F4 · derivative.exercise_date: (c) Tranche 3, consisting of 8,100 phantom units (assuming 100% payout at target), will potentially vest on the Aug. 2027 distribution date at a scaled payout range of between 0% and 200% based on PAA achieving cumul. distributable cash flow (DCF) per common unit equivalent (CUE) of $7.75 over the 3-year period ending 6/30/27 (with payout equaling 100% at cumul. DCF/CUE over such period of $7.75 and being equal to 0% for cumul. DCF/CUE over such period of $6.975 or lower and 200% for cumul. DCF/CUE over such period of $8.71875 or higher, with interpolation btw. such points, and with payout being subject to reduction by 25 basis pts. if PAA's leverage ratio (long term debt to adj. EBITDA as calculated pursuant to PAA's sr. unsecured revolving credit facility) as of 6/30/27 is greater than the leverage ratio that equals the upper end of our then applicable target leverage ratio range (e.g., 3.0x is the upper end of PAA's current target leverage ratio range of 2.5x to 3.0x).

F5 · derivative.exercise_date: DERs associated with Tranche 1 will accrue for the first year and be paid in cash in a lump sum on the August 2025 distribution date; beginning in November 2025, DERs associated with Tranche 1 will be paid quarterly until the phantom units vest or terminate. DERs associated with Tranches 2 and 3 will accrue during the three-year vesting period and be paid in cash in a lump sum on the August 2027 distribution date with respect to each phantom unit that vests, if any, on such date. Any Tranche 2 or Tranche 3 phantom units that are determined to not have vested as of the August 2027 distribution date shall expire as of such date.

F3 · derivative.expiration_date: These phantom units will vest as follows: (a) Tranche 1, consisting of 16,200 phantom units, will vest on the August 2027 distribution date assuming continued service through such date; (b) Tranche 2, consisting of 8,100 phantom units (assuming 100% payout at target), will potentially vest on the August 2027 distribution date at a scaled payout range of between 0% to 200% based on PAA's total shareholder return (TSR) over the three-year period ending June 30, 2027 compared to the TSR of a selected peer group (payout based on numeric rank with 100% earned at median and interpolation between ranks, and with payout being subject to reduction by up to 25 basis points, but not below 100%, if actual TSR is negative); and

F4 · derivative.expiration_date: (c) Tranche 3, consisting of 8,100 phantom units (assuming 100% payout at target), will potentially vest on the Aug. 2027 distribution date at a scaled payout range of between 0% and 200% based on PAA achieving cumul. distributable cash flow (DCF) per common unit equivalent (CUE) of $7.75 over the 3-year period ending 6/30/27 (with payout equaling 100% at cumul. DCF/CUE over such period of $7.75 and being equal to 0% for cumul. DCF/CUE over such period of $6.975 or lower and 200% for cumul. DCF/CUE over such period of $8.71875 or higher, with interpolation btw. such points, and with payout being subject to reduction by 25 basis pts. if PAA's leverage ratio (long term debt to adj. EBITDA as calculated pursuant to PAA's sr. unsecured revolving credit facility) as of 6/30/27 is greater than the leverage ratio that equals the upper end of our then applicable target leverage ratio range (e.g., 3.0x is the upper end of PAA's current target leverage ratio range of 2.5x to 3.0x).

F5 · derivative.expiration_date: DERs associated with Tranche 1 will accrue for the first year and be paid in cash in a lump sum on the August 2025 distribution date; beginning in November 2025, DERs associated with Tranche 1 will be paid quarterly until the phantom units vest or terminate. DERs associated with Tranches 2 and 3 will accrue during the three-year vesting period and be paid in cash in a lump sum on the August 2027 distribution date with respect to each phantom unit that vests, if any, on such date. Any Tranche 2 or Tranche 3 phantom units that are determined to not have vested as of the August 2027 distribution date shall expire as of such date.

SEC source: 0001062993-24-015263 · form4.xml · derivative · entry 4

Chandler Chris R. · CIK 0001769245 · EVP & COO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 143,100

Underlying: Common Units · 143,100 shares

Expires not disclosed

F1 · security: Phantom Units granted under Long-Term Incentive Plan (includes distribution equivalent rights payable in cash).

F2 · derivative.exercise_price: One common unit is deliverable, upon vesting, for each Phantom Unit that vests.

F3 · derivative.exercise_date: These phantom units will vest as follows: (a) Tranche 1, consisting of 71,550 phantom units, will vest on the August 2027 distribution date assuming continued service through such date; (b) Tranche 2, consisting of 35,775 phantom units (assuming 100% payout at target), will potentially vest on the August 2027 distribution date at a scaled payout range of between 0% to 200% based on PAA's total shareholder return (TSR) over the three-year period ending June 30, 2027 compared to the TSR of a selected peer group (payout based on numeric rank with 100% earned at median and interpolation between ranks, and with payout being subject to reduction by up to 25 basis points, but not below 100%, if actual TSR is negative); and

F4 · derivative.exercise_date: (c) Tranche 3, consisting of 35,775 phantom units (assuming 100% payout at target), will potentially vest on the Aug. 2027 distribution date at a scaled payout range of between 0% and 200% based on PAA achieving cumul. distributable cash flow (DCF) per common unit equivalent (CUE) of $7.75 over the 3-year period ending 6/30/27 (with payout equaling 100% at cumul. DCF/CUE over such period of $7.75 and being equal to 0% for cumul. DCF/CUE over such period of $6.975 or lower and 200% for cumul. DCF/CUE over such period of $8.71875 or higher, with interpolation btw. such points, and with payout being subject to reduction by 25 basis pts. if PAA's leverage ratio (long term debt to adj. EBITDA as calculated pursuant to PAA's sr. unsecured revolving credit facility) as of 6/30/27 is greater than the leverage ratio that equals the upper end of our then applicable target leverage ratio range (e.g., 3.0x is the upper end of PAA's current target leverage ratio range of 2.5x to 3.0x).

F5 · derivative.exercise_date: DERs associated with Tranche 1 will accrue for the first year and be paid in cash in a lump sum on the August 2025 distribution date; beginning in November 2025, DERs associated with Tranche 1 will be paid quarterly until the phantom units vest or terminate. DERs associated with Tranches 2 and 3 will accrue during the three-year vesting period and be paid in cash in a lump sum on the August 2027 distribution date with respect to each phantom unit that vests, if any, on such date. Any Tranche 2 or Tranche 3 phantom units that are determined to not have vested as of the August 2027 distribution date shall expire as of such date.

F3 · derivative.expiration_date: These phantom units will vest as follows: (a) Tranche 1, consisting of 71,550 phantom units, will vest on the August 2027 distribution date assuming continued service through such date; (b) Tranche 2, consisting of 35,775 phantom units (assuming 100% payout at target), will potentially vest on the August 2027 distribution date at a scaled payout range of between 0% to 200% based on PAA's total shareholder return (TSR) over the three-year period ending June 30, 2027 compared to the TSR of a selected peer group (payout based on numeric rank with 100% earned at median and interpolation between ranks, and with payout being subject to reduction by up to 25 basis points, but not below 100%, if actual TSR is negative); and

F4 · derivative.expiration_date: (c) Tranche 3, consisting of 35,775 phantom units (assuming 100% payout at target), will potentially vest on the Aug. 2027 distribution date at a scaled payout range of between 0% and 200% based on PAA achieving cumul. distributable cash flow (DCF) per common unit equivalent (CUE) of $7.75 over the 3-year period ending 6/30/27 (with payout equaling 100% at cumul. DCF/CUE over such period of $7.75 and being equal to 0% for cumul. DCF/CUE over such period of $6.975 or lower and 200% for cumul. DCF/CUE over such period of $8.71875 or higher, with interpolation btw. such points, and with payout being subject to reduction by 25 basis pts. if PAA's leverage ratio (long term debt to adj. EBITDA as calculated pursuant to PAA's sr. unsecured revolving credit facility) as of 6/30/27 is greater than the leverage ratio that equals the upper end of our then applicable target leverage ratio range (e.g., 3.0x is the upper end of PAA's current target leverage ratio range of 2.5x to 3.0x).

F5 · derivative.expiration_date: DERs associated with Tranche 1 will accrue for the first year and be paid in cash in a lump sum on the August 2025 distribution date; beginning in November 2025, DERs associated with Tranche 1 will be paid quarterly until the phantom units vest or terminate. DERs associated with Tranches 2 and 3 will accrue during the three-year vesting period and be paid in cash in a lump sum on the August 2027 distribution date with respect to each phantom unit that vests, if any, on such date. Any Tranche 2 or Tranche 3 phantom units that are determined to not have vested as of the August 2027 distribution date shall expire as of such date.

SEC source: 0001062993-24-015256 · form4.xml · derivative · entry 4

Swanson Al · CIK 0001292270 · EVP & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 108,000

Underlying: Common Units · 108,000 shares

Expires not disclosed

F1 · security: Phantom Units granted under Long-Term Incentive Plan (includes distribution equivalent rights payable in cash).

F2 · derivative.exercise_price: One common unit is deliverable, upon vesting, for each Phantom Unit that vests.

F3 · derivative.exercise_date: These phantom units will vest as follows: (a) Tranche 1, consisting of 54,000 phantom units, will vest on the August 2027 distribution date assuming continued service through such date; (b) Tranche 2, consisting of 27,000 phantom units (assuming 100% payout at target), will potentially vest on the August 2027 distribution date at a scaled payout range of between 0% to 200% based on PAA's total shareholder return (TSR) over the three-year period ending June 30, 2027 compared to the TSR of a selected peer group (payout based on numeric rank with 100% earned at median and interpolation between ranks, and with payout being subject to reduction by up to 25 basis points, but not below 100%, if actual TSR is negative); and

F4 · derivative.exercise_date: (c) Tranche 3, consisting of 27,000 phantom units (assuming 100% payout at target), will potentially vest on the Aug. 2027 distribution date at a scaled payout range of between 0% and 200% based on PAA achieving cumul. distributable cash flow (DCF) per common unit equivalent (CUE) of $7.75 over the 3-year period ending 6/30/27 (with payout equaling 100% at cumul. DCF/CUE over such period of $7.75 and being equal to 0% for cumul. DCF/CUE over such period of $6.975 or lower and 200% for cumul. DCF/CUE over such period of $8.71875 or higher, with interpolation btw. such points, and with payout being subject to reduction by 25 basis pts. if PAA's leverage ratio (long term debt to adj. EBITDA as calculated pursuant to PAA's sr. unsecured revolving credit facility) as of 6/30/27 is greater than the leverage ratio that equals the upper end of our then applicable target leverage ratio range (e.g., 3.0x is the upper end of PAA's current target leverage ratio range of 2.5x to 3.0x).

F5 · derivative.exercise_date: DERs associated with Tranche 1 will accrue for the first year and be paid in cash in a lump sum on the August 2025 distribution date; beginning in November 2025, DERs associated with Tranche 1 will be paid quarterly until the phantom units vest or terminate. DERs associated with Tranches 2 and 3 will accrue during the three-year vesting period and be paid in cash in a lump sum on the August 2027 distribution date with respect to each phantom unit that vests, if any, on such date. Any Tranche 2 or Tranche 3 phantom units that are determined to not have vested as of the August 2027 distribution date shall expire as of such date.

F3 · derivative.expiration_date: These phantom units will vest as follows: (a) Tranche 1, consisting of 54,000 phantom units, will vest on the August 2027 distribution date assuming continued service through such date; (b) Tranche 2, consisting of 27,000 phantom units (assuming 100% payout at target), will potentially vest on the August 2027 distribution date at a scaled payout range of between 0% to 200% based on PAA's total shareholder return (TSR) over the three-year period ending June 30, 2027 compared to the TSR of a selected peer group (payout based on numeric rank with 100% earned at median and interpolation between ranks, and with payout being subject to reduction by up to 25 basis points, but not below 100%, if actual TSR is negative); and

F4 · derivative.expiration_date: (c) Tranche 3, consisting of 27,000 phantom units (assuming 100% payout at target), will potentially vest on the Aug. 2027 distribution date at a scaled payout range of between 0% and 200% based on PAA achieving cumul. distributable cash flow (DCF) per common unit equivalent (CUE) of $7.75 over the 3-year period ending 6/30/27 (with payout equaling 100% at cumul. DCF/CUE over such period of $7.75 and being equal to 0% for cumul. DCF/CUE over such period of $6.975 or lower and 200% for cumul. DCF/CUE over such period of $8.71875 or higher, with interpolation btw. such points, and with payout being subject to reduction by 25 basis pts. if PAA's leverage ratio (long term debt to adj. EBITDA as calculated pursuant to PAA's sr. unsecured revolving credit facility) as of 6/30/27 is greater than the leverage ratio that equals the upper end of our then applicable target leverage ratio range (e.g., 3.0x is the upper end of PAA's current target leverage ratio range of 2.5x to 3.0x).

F5 · derivative.expiration_date: DERs associated with Tranche 1 will accrue for the first year and be paid in cash in a lump sum on the August 2025 distribution date; beginning in November 2025, DERs associated with Tranche 1 will be paid quarterly until the phantom units vest or terminate. DERs associated with Tranches 2 and 3 will accrue during the three-year vesting period and be paid in cash in a lump sum on the August 2027 distribution date with respect to each phantom unit that vests, if any, on such date. Any Tranche 2 or Tranche 3 phantom units that are determined to not have vested as of the August 2027 distribution date shall expire as of such date.

SEC source: 0001062993-24-015254 · form4.xml · derivative · entry 4

McGee Richard K. · CIK 0001490023 · EVP, General Counsel & Sec.

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 108,000

Underlying: Common Units · 108,000 shares

Expires not disclosed

F1 · security: Phantom Units granted under Long-Term Incentive Plan (includes distribution equivalent rights payable in cash).

F2 · derivative.exercise_price: One common unit is deliverable, upon vesting, for each Phantom Unit that vests.

F3 · derivative.exercise_date: These phantom units will vest as follows: (a) Tranche 1, consisting of 54,000 phantom units, will vest on the August 2027 distribution date assuming continued service through such date; (b) Tranche 2, consisting of 27,000 phantom units (assuming 100% payout at target), will potentially vest on the August 2027 distribution date at a scaled payout range of between 0% to 200% based on PAA's total shareholder return (TSR) over the three-year period ending June 30, 2027 compared to the TSR of a selected peer group (payout based on numeric rank with 100% earned at median and interpolation between ranks, and with payout being subject to reduction by up to 25 basis points, but not below 100%, if actual TSR is negative); and

F4 · derivative.exercise_date: (c) Tranche 3, consisting of 27,000 phantom units (assuming 100% payout at target), will potentially vest on the Aug. 2027 distribution date at a scaled payout range of between 0% and 200% based on PAA achieving cumul. distributable cash flow (DCF) per common unit equivalent (CUE) of $7.75 over the 3-year period ending 6/30/27 (with payout equaling 100% at cumul. DCF/CUE over such period of $7.75 and being equal to 0% for cumul. DCF/CUE over such period of $6.975 or lower and 200% for cumul. DCF/CUE over such period of $8.71875 or higher, with interpolation btw. such points, and with payout being subject to reduction by 25 basis pts. if PAA's leverage ratio (long term debt to adj. EBITDA as calculated pursuant to PAA's sr. unsecured revolving credit facility) as of 6/30/27 is greater than the leverage ratio that equals the upper end of our then applicable target leverage ratio range (e.g., 3.0x is the upper end of PAA's current target leverage ratio range of 2.5x to 3.0x).

F5 · derivative.exercise_date: DERs associated with Tranche 1 will accrue for the first year and be paid in cash in a lump sum on the August 2025 distribution date; beginning in November 2025, DERs associated with Tranche 1 will be paid quarterly until the phantom units vest or terminate. DERs associated with Tranches 2 and 3 will accrue during the three-year vesting period and be paid in cash in a lump sum on the August 2027 distribution date with respect to each phantom unit that vests, if any, on such date. Any Tranche 2 or Tranche 3 phantom units that are determined to not have vested as of the August 2027 distribution date shall expire as of such date.

F3 · derivative.expiration_date: These phantom units will vest as follows: (a) Tranche 1, consisting of 54,000 phantom units, will vest on the August 2027 distribution date assuming continued service through such date; (b) Tranche 2, consisting of 27,000 phantom units (assuming 100% payout at target), will potentially vest on the August 2027 distribution date at a scaled payout range of between 0% to 200% based on PAA's total shareholder return (TSR) over the three-year period ending June 30, 2027 compared to the TSR of a selected peer group (payout based on numeric rank with 100% earned at median and interpolation between ranks, and with payout being subject to reduction by up to 25 basis points, but not below 100%, if actual TSR is negative); and

F4 · derivative.expiration_date: (c) Tranche 3, consisting of 27,000 phantom units (assuming 100% payout at target), will potentially vest on the Aug. 2027 distribution date at a scaled payout range of between 0% and 200% based on PAA achieving cumul. distributable cash flow (DCF) per common unit equivalent (CUE) of $7.75 over the 3-year period ending 6/30/27 (with payout equaling 100% at cumul. DCF/CUE over such period of $7.75 and being equal to 0% for cumul. DCF/CUE over such period of $6.975 or lower and 200% for cumul. DCF/CUE over such period of $8.71875 or higher, with interpolation btw. such points, and with payout being subject to reduction by 25 basis pts. if PAA's leverage ratio (long term debt to adj. EBITDA as calculated pursuant to PAA's sr. unsecured revolving credit facility) as of 6/30/27 is greater than the leverage ratio that equals the upper end of our then applicable target leverage ratio range (e.g., 3.0x is the upper end of PAA's current target leverage ratio range of 2.5x to 3.0x).

F5 · derivative.expiration_date: DERs associated with Tranche 1 will accrue for the first year and be paid in cash in a lump sum on the August 2025 distribution date; beginning in November 2025, DERs associated with Tranche 1 will be paid quarterly until the phantom units vest or terminate. DERs associated with Tranches 2 and 3 will accrue during the three-year vesting period and be paid in cash in a lump sum on the August 2027 distribution date with respect to each phantom unit that vests, if any, on such date. Any Tranche 2 or Tranche 3 phantom units that are determined to not have vested as of the August 2027 distribution date shall expire as of such date.

SEC source: 0001062993-24-015250 · form4.xml · derivative · entry 6

Goebel Jeremy L. · CIK 0001769336 · EVP & CCO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 143,100

Underlying: Common Units · 143,100 shares

Expires not disclosed

F1 · security: Phantom Units granted under Long-Term Incentive Plan (includes distribution equivalent rights payable in cash).

F2 · derivative.exercise_price: One common unit is deliverable, upon vesting, for each Phantom Unit that vests.

F3 · derivative.exercise_date: These phantom units will vest as follows: (a) Tranche 1, consisting of 71,550 phantom units, will vest on the August 2027 distribution date assuming continued service through such date; (b) Tranche 2, consisting of 35,775 phantom units (assuming 100% payout at target), will potentially vest on the August 2027 distribution date at a scaled payout range of between 0% to 200% based on PAA's total shareholder return (TSR) over the three-year period ending June 30, 2027 compared to the TSR of a selected peer group (payout based on numeric rank with 100% earned at median and interpolation between ranks, and with payout being subject to reduction by up to 25 basis points, but not below 100%, if actual TSR is negative); and

F4 · derivative.exercise_date: (c) Tranche 3, consisting of 35,775 phantom units (assuming 100% payout at target), will potentially vest on the Aug. 2027 distribution date at a scaled payout range of between 0% and 200% based on PAA achieving cumul. distributable cash flow (DCF) per common unit equivalent (CUE) of $7.75 over the 3-year period ending 6/30/27 (with payout equaling 100% at cumul. DCF/CUE over such period of $7.75 and being equal to 0% for cumul. DCF/CUE over such period of $6.975 or lower and 200% for cumul. DCF/CUE over such period of $8.71875 or higher, with interpolation btw. such points, and with payout being subject to reduction by 25 basis pts. if PAA's leverage ratio (long term debt to adj. EBITDA as calculated pursuant to PAA's sr. unsecured revolving credit facility) as of 6/30/27 is greater than the leverage ratio that equals the upper end of our then applicable target leverage ratio range (e.g., 3.0x is the upper end of PAA's current target leverage ratio range of 2.5x to 3.0x).

F5 · derivative.exercise_date: DERs associated with Tranche 1 will accrue for the first year and be paid in cash in a lump sum on the August 2025 distribution date; beginning in November 2025, DERs associated with Tranche 1 will be paid quarterly until the phantom units vest or terminate. DERs associated with Tranches 2 and 3 will accrue during the three-year vesting period and be paid in cash in a lump sum on the August 2027 distribution date with respect to each phantom unit that vests, if any, on such date. Any Tranche 2 or Tranche 3 phantom units that are determined to not have vested as of the August 2027 distribution date shall expire as of such date.

F3 · derivative.expiration_date: These phantom units will vest as follows: (a) Tranche 1, consisting of 71,550 phantom units, will vest on the August 2027 distribution date assuming continued service through such date; (b) Tranche 2, consisting of 35,775 phantom units (assuming 100% payout at target), will potentially vest on the August 2027 distribution date at a scaled payout range of between 0% to 200% based on PAA's total shareholder return (TSR) over the three-year period ending June 30, 2027 compared to the TSR of a selected peer group (payout based on numeric rank with 100% earned at median and interpolation between ranks, and with payout being subject to reduction by up to 25 basis points, but not below 100%, if actual TSR is negative); and

F4 · derivative.expiration_date: (c) Tranche 3, consisting of 35,775 phantom units (assuming 100% payout at target), will potentially vest on the Aug. 2027 distribution date at a scaled payout range of between 0% and 200% based on PAA achieving cumul. distributable cash flow (DCF) per common unit equivalent (CUE) of $7.75 over the 3-year period ending 6/30/27 (with payout equaling 100% at cumul. DCF/CUE over such period of $7.75 and being equal to 0% for cumul. DCF/CUE over such period of $6.975 or lower and 200% for cumul. DCF/CUE over such period of $8.71875 or higher, with interpolation btw. such points, and with payout being subject to reduction by 25 basis pts. if PAA's leverage ratio (long term debt to adj. EBITDA as calculated pursuant to PAA's sr. unsecured revolving credit facility) as of 6/30/27 is greater than the leverage ratio that equals the upper end of our then applicable target leverage ratio range (e.g., 3.0x is the upper end of PAA's current target leverage ratio range of 2.5x to 3.0x).

F5 · derivative.expiration_date: DERs associated with Tranche 1 will accrue for the first year and be paid in cash in a lump sum on the August 2025 distribution date; beginning in November 2025, DERs associated with Tranche 1 will be paid quarterly until the phantom units vest or terminate. DERs associated with Tranches 2 and 3 will accrue during the three-year vesting period and be paid in cash in a lump sum on the August 2027 distribution date with respect to each phantom unit that vests, if any, on such date. Any Tranche 2 or Tranche 3 phantom units that are determined to not have vested as of the August 2027 distribution date shall expire as of such date.

SEC source: 0001062993-24-015244 · form4.xml · derivative · entry 4

Chiang Willie CW · CIK 0001421559 · Director · Chairman & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 357,750

Underlying: Common Units · 357,750 shares

Expires not disclosed

F1 · security: Phantom Units granted under Long-Term Incentive Plan (includes distribution equivalent rights payable in cash).

F2 · derivative.exercise_price: One common unit is deliverable, upon vesting, for each Phantom Unit that vests.

F3 · derivative.exercise_date: These phantom units will vest as follows: (a) Tranche 1, consisting of 178,875 phantom units, will vest on the August 2027 distribution date assuming continued service through such date; (b) Tranche 2, consisting of 89,437 phantom units (assuming 100% payout at target), will potentially vest on the August 2027 distribution date at a scaled payout range of between 0% to 200% based on PAA's total shareholder return (TSR) over the three-year period ending June 30, 2027 compared to the TSR of a selected peer group (payout based on numeric rank with 100% earned at median and interpolation between ranks, and with payout being subject to reduction by up to 25 basis points, but not below 100%, if actual TSR is negative); and

F4 · derivative.exercise_date: (c) Tranche 3, consisting of 89,438 phantom units (assuming 100% payout at target), will potentially vest on the Aug. 2027 distribution date at a scaled payout range of between 0% and 200% based on PAA achieving cumul. distributable cash flow (DCF) per common unit equivalent (CUE) of $7.75 over the 3-year period ending 6/30/27 (with payout equaling 100% at cumul. DCF/CUE over such period of $7.75 and being equal to 0% for cumul. DCF/CUE over such period of $6.975 or lower and 200% for cumul. DCF/CUE over such period of $8.71875 or higher, with interpolation btw. such points, and with payout being subject to reduction by 25 basis pts. if PAA's leverage ratio (long term debt to adj. EBITDA as calculated pursuant to PAA's sr. unsecured revolving credit facility) as of 6/30/27 is greater than the leverage ratio that equals the upper end of our then applicable target leverage ratio range (e.g., 3.0x is the upper end of PAA's current target leverage ratio range of 2.5x to 3.0x).

F5 · derivative.exercise_date: DERs associated with Tranche 1 will accrue for the first year and be paid in cash in a lump sum on the August 2025 distribution date; beginning in November 2025, DERs associated with Tranche 1 will be paid quarterly until the phantom units vest or terminate. DERs associated with Tranches 2 and 3 will accrue during the three-year vesting period and be paid in cash in a lump sum on the August 2027 distribution date with respect to each phantom unit that vests, if any, on such date. Any Tranche 2 or Tranche 3 phantom units that are determined to not have vested as of the August 2027 distribution date shall expire as of such date.

F3 · derivative.expiration_date: These phantom units will vest as follows: (a) Tranche 1, consisting of 178,875 phantom units, will vest on the August 2027 distribution date assuming continued service through such date; (b) Tranche 2, consisting of 89,437 phantom units (assuming 100% payout at target), will potentially vest on the August 2027 distribution date at a scaled payout range of between 0% to 200% based on PAA's total shareholder return (TSR) over the three-year period ending June 30, 2027 compared to the TSR of a selected peer group (payout based on numeric rank with 100% earned at median and interpolation between ranks, and with payout being subject to reduction by up to 25 basis points, but not below 100%, if actual TSR is negative); and

F4 · derivative.expiration_date: (c) Tranche 3, consisting of 89,438 phantom units (assuming 100% payout at target), will potentially vest on the Aug. 2027 distribution date at a scaled payout range of between 0% and 200% based on PAA achieving cumul. distributable cash flow (DCF) per common unit equivalent (CUE) of $7.75 over the 3-year period ending 6/30/27 (with payout equaling 100% at cumul. DCF/CUE over such period of $7.75 and being equal to 0% for cumul. DCF/CUE over such period of $6.975 or lower and 200% for cumul. DCF/CUE over such period of $8.71875 or higher, with interpolation btw. such points, and with payout being subject to reduction by 25 basis pts. if PAA's leverage ratio (long term debt to adj. EBITDA as calculated pursuant to PAA's sr. unsecured revolving credit facility) as of 6/30/27 is greater than the leverage ratio that equals the upper end of our then applicable target leverage ratio range (e.g., 3.0x is the upper end of PAA's current target leverage ratio range of 2.5x to 3.0x).

F5 · derivative.expiration_date: DERs associated with Tranche 1 will accrue for the first year and be paid in cash in a lump sum on the August 2025 distribution date; beginning in November 2025, DERs associated with Tranche 1 will be paid quarterly until the phantom units vest or terminate. DERs associated with Tranches 2 and 3 will accrue during the three-year vesting period and be paid in cash in a lump sum on the August 2027 distribution date with respect to each phantom unit that vests, if any, on such date. Any Tranche 2 or Tranche 3 phantom units that are determined to not have vested as of the August 2027 distribution date shall expire as of such date.

SEC source: 0001062993-24-015210 · form4.xml · nonDerivative · entry 1

PAA GP Holdings LLC · CIK 0001581928 · Director · 10% owner

Plains AAP, L.P. · CIK 0001490401 · Director · 10% owner

Plains All American GP LLC · CIK 0001490402 · Director · 10% owner

PLAINS GP HOLDINGS LP · CIK 0001581990 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · By Plains AAP, L.P.

Disclosed balance after: 232,855,930

F1 · kind: Pursuant to that certain Omnibus Agreement (the "Omnibus Agreement") dated November 15, 2016, by and among PAA GP Holdings LLC ("PAGP GP"), Plains GP Holdings, L.P. ("PAGP"), Plains All American GP LLC ("GP LLC"), Plains AAP, L.P. ("AAP"), PAA GP LLC and Plains All American Pipeline, L.P. ("PAA"), AAP is obligated to issue to PAGP a number of AAP Class A units equal to the number of PAGP Class A shares issued upon vesting of awards under PAGP's long-term incentive plan. The Omnibus Agreement also provides that immediately following such issuance, PAA is obligated to issue to AAP an equivalent number of PAA Common Units. On August 14, 2024, a total of 202,002 PAGP Class A shares were issued in connection with the vesting of outstanding LTIP awards under PAGP's long-term incentive plan. An equal number of AAP Class A units was issued to PAGP and an equal number of PAA Common Units was issued to AAP.

F1 · price: Pursuant to that certain Omnibus Agreement (the "Omnibus Agreement") dated November 15, 2016, by and among PAA GP Holdings LLC ("PAGP GP"), Plains GP Holdings, L.P. ("PAGP"), Plains All American GP LLC ("GP LLC"), Plains AAP, L.P. ("AAP"), PAA GP LLC and Plains All American Pipeline, L.P. ("PAA"), AAP is obligated to issue to PAGP a number of AAP Class A units equal to the number of PAGP Class A shares issued upon vesting of awards under PAGP's long-term incentive plan. The Omnibus Agreement also provides that immediately following such issuance, PAA is obligated to issue to AAP an equivalent number of PAA Common Units. On August 14, 2024, a total of 202,002 PAGP Class A shares were issued in connection with the vesting of outstanding LTIP awards under PAGP's long-term incentive plan. An equal number of AAP Class A units was issued to PAGP and an equal number of PAA Common Units was issued to AAP.

F2 · ownership.nature: PAGP GP is the general partner of PAGP, which is the managing member of GP LLC, which is the general partner of AAP. Each of PAGP GP, PAGP and GP LLC may be deemed to indirectly beneficially own the Common Units directly held by AAP, but disclaim beneficial ownership of such Common Units except to the extent of their respective pecuniary interests therein.

SEC source: 0001062993-24-015259 · form4.xml · derivative · entry 3

Herbold Chris · CIK 0001497929 · Sr. VP Finance & CAO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Units · 96,264 shares

Expires 2024-08-14

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.

F1 · security: Phantom Units granted under Long-Term Incentive Plan (includes distribution equivalent rights payable in cash).

F2 · derivative.exercise_price: One common unit is deliverable, upon vesting, for each Phantom Unit that vests.

SEC source: 0001062993-24-015259 · form4.xml · nonDerivative · entry 2

Herbold Chris · CIK 0001497929 · Sr. VP Finance & CAO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 198,561

SEC source: 0001062993-24-015259 · form4.xml · nonDerivative · entry 1

Herbold Chris · CIK 0001497929 · Sr. VP Finance & CAO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 233,920

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: 0001062993-24-015263 · form4.xml · derivative · entry 3

Chandler Chris R. · CIK 0001769245 · EVP & COO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Units · 167,378 shares

Expires 2024-08-14

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.

F1 · security: Phantom Units granted under Long-Term Incentive Plan (includes distribution equivalent rights payable in cash).

F2 · derivative.exercise_price: One common unit is deliverable, upon vesting, for each Phantom Unit that vests.

SEC source: 0001062993-24-015263 · form4.xml · nonDerivative · entry 2

Chandler Chris R. · CIK 0001769245 · EVP & COO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 355,705

SEC source: 0001062993-24-015263 · form4.xml · nonDerivative · entry 1

Chandler Chris R. · CIK 0001769245 · EVP & COO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 421,569

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: 0001062993-24-015256 · form4.xml · derivative · entry 3

Swanson Al · CIK 0001292270 · EVP & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Units · 167,378 shares

Expires 2024-08-14

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.

F1 · security: Phantom Units granted under Long-Term Incentive Plan (includes distribution equivalent rights payable in cash).

F2 · derivative.exercise_price: One common unit is deliverable, upon vesting, for each Phantom Unit that vests.

SEC source: 0001062993-24-015256 · form4.xml · nonDerivative · entry 2

Swanson Al · CIK 0001292270 · EVP & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 494,714

SEC source: 0001062993-24-015256 · form4.xml · nonDerivative · entry 1

Swanson Al · CIK 0001292270 · EVP & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 560,578

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: 0001062993-24-015254 · form4.xml · derivative · entry 3

McGee Richard K. · CIK 0001490023 · EVP, General Counsel & Sec.

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Units · 167,378 shares

Expires 2024-08-14

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.

F1 · security: Phantom Units granted under Long-Term Incentive Plan (includes distribution equivalent rights payable in cash).

F2 · derivative.exercise_price: One common unit is deliverable, upon vesting, for each Phantom Unit that vests.

SEC source: 0001062993-24-015254 · form4.xml · nonDerivative · entry 2

McGee Richard K. · CIK 0001490023 · EVP, General Counsel & Sec.

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 499,166

SEC source: 0001062993-24-015254 · form4.xml · nonDerivative · entry 1

McGee Richard K. · CIK 0001490023 · EVP, General Counsel & Sec.

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 565,030

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: 0001062993-24-015250 · form4.xml · derivative · entry 5

Goebel Jeremy L. · CIK 0001769336 · EVP & CCO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Units · 167,378 shares

Expires 2024-08-14

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.

F1 · security: Phantom Units granted under Long-Term Incentive Plan (includes distribution equivalent rights payable in cash).

F2 · derivative.exercise_price: One common unit is deliverable, upon vesting, for each Phantom Unit that vests.

SEC source: 0001062993-24-015250 · form4.xml · nonDerivative · entry 4

Goebel Jeremy L. · CIK 0001769336 · EVP & CCO

10b5-1 filing: No plan indicated

Ownership: Indirect · By Family Limited Partnership

Disclosed balance after: 380,737

SEC source: 0001062993-24-015250 · form4.xml · nonDerivative · entry 3

Goebel Jeremy L. · CIK 0001769336 · EVP & CCO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

SEC source: 0001062993-24-015250 · form4.xml · nonDerivative · entry 2

Goebel Jeremy L. · CIK 0001769336 · EVP & CCO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 101,514

SEC source: 0001062993-24-015250 · form4.xml · nonDerivative · entry 1

Goebel Jeremy L. · CIK 0001769336 · EVP & CCO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 167,378

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: 0001062993-24-015244 · form4.xml · derivative · entry 3

Chiang Willie CW · CIK 0001421559 · Director · Chairman & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Units · 418,585 shares

Expires 2024-08-14

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.

F1 · security: Phantom Units granted under Long-Term Incentive Plan (includes distribution equivalent rights payable in cash).

F2 · derivative.exercise_price: One common unit is deliverable, upon vesting, for each Phantom Unit that vests.

SEC source: 0001062993-24-015244 · form4.xml · nonDerivative · entry 2

Chiang Willie CW · CIK 0001421559 · Director · Chairman & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 846,512

SEC source: 0001062993-24-015244 · form4.xml · nonDerivative · entry 1

Chiang Willie CW · CIK 0001421559 · Director · Chairman & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,011,226

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: 0001062993-23-021301 · form4.xml · nonDerivative · entry 1

Goebel Jeremy L. · CIK 0001769336 · EVP & CCO

10b5-1 filing: No plan indicated

Ownership: Indirect · By Family Limited Partnership

Disclosed balance after: 279,223

F1 · price: The price in column 4 reflects the weighted average sales price for the common units. The units were sold in multiple transactions at prices ranging from $15.50 to $15.60. The reporting person will provide upon request by the SEC staff the issuer or any security holder of the issuer full information regarding the number of units sold at each separate price.

SEC source: 0001062993-23-019389 · form4.xml · nonDerivative · entry 1

PAA GP Holdings LLC · CIK 0001581928 · Director · 10% owner

Plains AAP, L.P. · CIK 0001490401 · Director · 10% owner

Plains All American GP LLC · CIK 0001490402 · Director · 10% owner

PLAINS GP HOLDINGS LP · CIK 0001581990 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · By Plains AAP, L.P.

Disclosed balance after: 232,653,928

F1 · kind: Pursuant to the limited partnership agreement of Plains AAP, L.P. ("AAP"), each limited partner of AAP, other than Plains GP Holdings, L.P. ("PAGP") and Plains All American GP LLC ("GP LLC"), has the right, from time to time, to cause AAP to redeem and cancel such partner's AAP Class A units in exchange for the distribution of an equal number of common units representing limited partner interests ("Common Units") of Plains All American Pipeline, L.P. ("PAA") held by AAP (the "Redemption Right"). In connection with the exercise of a Redemption Right, such limited partner must also surrender to PAGP an equal number of Class B shares of PAGP and, if applicable, Company Units of PAA GP Holdings LLC ("PAGP GP").

F2 · kind: Effective October 13, 2023, certain limited partners of AAP exercised their Redemption Right with respect to an aggregate of 6,353,042 AAP Class A units, resulting in the cancellation of such AAP Class A units and the distribution of an aggregate of 6,353,042 Common Units from AAP to the redeeming partner.

F1 · price: Pursuant to the limited partnership agreement of Plains AAP, L.P. ("AAP"), each limited partner of AAP, other than Plains GP Holdings, L.P. ("PAGP") and Plains All American GP LLC ("GP LLC"), has the right, from time to time, to cause AAP to redeem and cancel such partner's AAP Class A units in exchange for the distribution of an equal number of common units representing limited partner interests ("Common Units") of Plains All American Pipeline, L.P. ("PAA") held by AAP (the "Redemption Right"). In connection with the exercise of a Redemption Right, such limited partner must also surrender to PAGP an equal number of Class B shares of PAGP and, if applicable, Company Units of PAA GP Holdings LLC ("PAGP GP").

F2 · price: Effective October 13, 2023, certain limited partners of AAP exercised their Redemption Right with respect to an aggregate of 6,353,042 AAP Class A units, resulting in the cancellation of such AAP Class A units and the distribution of an aggregate of 6,353,042 Common Units from AAP to the redeeming partner.

F3 · ownership.nature: PAGP GP is the general partner of PAGP, which is the managing member of GP LLC, which is the general partner of AAP. Each of PAGP GP, PAGP and GP LLC may be deemed to indirectly beneficially own the Common Units directly held by AAP, but disclaim beneficial ownership of such Common Units except to the extent of their respective pecuniary interests therein.

SEC source: 0001062993-23-018701 · form4.xml · nonDerivative · entry 1

PAA GP Holdings LLC · CIK 0001581928 · Director · 10% owner

Plains AAP, L.P. · CIK 0001490401 · Director · 10% owner

Plains All American GP LLC · CIK 0001490402 · Director · 10% owner

PLAINS GP HOLDINGS LP · CIK 0001581990 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · By Plains AAP, L.P.

Disclosed balance after: 239,006,970

F1 · kind: Pursuant to the limited partnership agreement of Plains AAP, L.P. ("AAP"), each limited partner of AAP, other than Plains GP Holdings, L.P. ("PAGP") and Plains All American GP LLC ("GP LLC"), has the right, from time to time, to cause AAP to redeem and cancel such partner's AAP Class A units in exchange for the distribution of an equal number of common units representing limited partner interests ("Common Units") of Plains All American Pipeline, L.P. ("PAA") held by AAP (the "Redemption Right"). In connection with the exercise of a Redemption Right, such limited partner must also surrender to PAGP an equal number of Class B shares of PAGP and, if applicable, Company Units of PAA GP Holdings LLC ("PAGP GP").

F2 · kind: Effective September 29, 2023, KAFU Holdings (QP), L.P. exercised the Redemption Right with respect to 1,892,538 AAP Class A units, resulting in the cancellation of such AAP Class A units and the distribution of 1,892,538 Common Units from AAP to the redeeming partner.

F1 · price: Pursuant to the limited partnership agreement of Plains AAP, L.P. ("AAP"), each limited partner of AAP, other than Plains GP Holdings, L.P. ("PAGP") and Plains All American GP LLC ("GP LLC"), has the right, from time to time, to cause AAP to redeem and cancel such partner's AAP Class A units in exchange for the distribution of an equal number of common units representing limited partner interests ("Common Units") of Plains All American Pipeline, L.P. ("PAA") held by AAP (the "Redemption Right"). In connection with the exercise of a Redemption Right, such limited partner must also surrender to PAGP an equal number of Class B shares of PAGP and, if applicable, Company Units of PAA GP Holdings LLC ("PAGP GP").

F2 · price: Effective September 29, 2023, KAFU Holdings (QP), L.P. exercised the Redemption Right with respect to 1,892,538 AAP Class A units, resulting in the cancellation of such AAP Class A units and the distribution of 1,892,538 Common Units from AAP to the redeeming partner.

F3 · ownership.nature: PAGP GP is the general partner of PAGP, which is the managing member of GP LLC, which is the general partner of AAP. Each of PAGP GP, PAGP and GP LLC may be deemed to indirectly beneficially own the Common Units directly held by AAP, but disclaim beneficial ownership of such Common Units except to the extent of their respective pecuniary interests therein.

SEC source: 0001062993-23-016960 · form4.xml · derivative · entry 1

Herbold Chris · CIK 0001497929 · Sr. VP & Chief Acctg Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 38,000

Underlying: Common Units · 38,000 shares

Expires not disclosed

F1 · security: Grant of Phantom Units under Long-Term Incentive Plan (includes distribution equivalent rights payable in cash).

F2 · derivative.exercise_price: One common unit is deliverable, upon vesting, for each Phantom Unit that vests.

F3 · derivative.exercise_date: These phantom units will vest as follows: (a) Tranche 1, consisting of 19,000 phantom units, will vest on the August 2026 distribution date assuming continued service through such date; (b) Tranche 2, consisting of 9,500 phantom units (assuming 100% payout at target), will potentially vest on the August 2026 distribution date at a scaled payout range of between 0% to 200% based on PAA's total shareholder return (TSR) over the three-year period ending June 30, 2026 compared to the TSR of a selected peer group (payout based on numeric rank with 100% earned at median and interpolation between ranks, and with payout being subject to reduction by up to 25 basis points, but not below 100%, if actual TSR is negative); and

F4 · derivative.exercise_date: c) Tranche 3, consisting of 9,500 phantom units (assuming 100% payout at target), will potentially vest on the August 2026 distribution date at a scaled payout range of between 0% and 200% based on PAA achieving cumulative distributable cash flow (DCF) per common unit equivalent (CUE) of $7.45 over the three-year period ending June 30, 2026 (with payout equaling 100% at cumulative DCF/CUE over such period of $7.45 and being equal to 0% for cumulative DCF/CUE over such period of $6.705 or lower and 200% for cumulative DCF/CUE over such period of $8.38125 or higher, with interpolation between such points, and with payout being subject to reduction by 25 basis points if PAA's leverage ratio (long term debt/adjusted EBITDA) as of June 30, 2026 is greater than the leverage ratio that equals the upper end of our then applicable guidance range (e.g., 3.5x is the upper end of PAA's current public guidance range of 3.0x to 3.5x)).

F5 · derivative.exercise_date: DERs associated with Tranche 1 will accrue for the first year and be paid in cash in a lump sum on the August 2024 distribution date; beginning in November 2024, DERs associated with Tranche 1 will be paid quarterly until the phantom units vest or terminate. DERs associated with Tranches 2 and 3 will accrue during the three-year vesting period and be paid in cash in a lump sum on the August 2026 distribution date with respect to each phantom unit that vests, if any, on such date. Any Tranche 2 or Tranche 3 phantom units that are determined to not have vested as of the August 2026 distribution date shall expire as of such date.

F3 · derivative.expiration_date: These phantom units will vest as follows: (a) Tranche 1, consisting of 19,000 phantom units, will vest on the August 2026 distribution date assuming continued service through such date; (b) Tranche 2, consisting of 9,500 phantom units (assuming 100% payout at target), will potentially vest on the August 2026 distribution date at a scaled payout range of between 0% to 200% based on PAA's total shareholder return (TSR) over the three-year period ending June 30, 2026 compared to the TSR of a selected peer group (payout based on numeric rank with 100% earned at median and interpolation between ranks, and with payout being subject to reduction by up to 25 basis points, but not below 100%, if actual TSR is negative); and

F4 · derivative.expiration_date: c) Tranche 3, consisting of 9,500 phantom units (assuming 100% payout at target), will potentially vest on the August 2026 distribution date at a scaled payout range of between 0% and 200% based on PAA achieving cumulative distributable cash flow (DCF) per common unit equivalent (CUE) of $7.45 over the three-year period ending June 30, 2026 (with payout equaling 100% at cumulative DCF/CUE over such period of $7.45 and being equal to 0% for cumulative DCF/CUE over such period of $6.705 or lower and 200% for cumulative DCF/CUE over such period of $8.38125 or higher, with interpolation between such points, and with payout being subject to reduction by 25 basis points if PAA's leverage ratio (long term debt/adjusted EBITDA) as of June 30, 2026 is greater than the leverage ratio that equals the upper end of our then applicable guidance range (e.g., 3.5x is the upper end of PAA's current public guidance range of 3.0x to 3.5x)).

F5 · derivative.expiration_date: DERs associated with Tranche 1 will accrue for the first year and be paid in cash in a lump sum on the August 2024 distribution date; beginning in November 2024, DERs associated with Tranche 1 will be paid quarterly until the phantom units vest or terminate. DERs associated with Tranches 2 and 3 will accrue during the three-year vesting period and be paid in cash in a lump sum on the August 2026 distribution date with respect to each phantom unit that vests, if any, on such date. Any Tranche 2 or Tranche 3 phantom units that are determined to not have vested as of the August 2026 distribution date shall expire as of such date.

SEC source: 0001062993-23-016958 · form4.xml · derivative · entry 1

Swanson Al · CIK 0001292270 · EVP & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 102,150

Underlying: Common Units · 102,150 shares

Expires not disclosed

F1 · security: Grant of Phantom Units under Long-Term Incentive Plan (includes distribution equivalent rights payable in cash).

F2 · derivative.exercise_price: One common unit is deliverable, upon vesting, for each Phantom Unit that vests.

F3 · derivative.exercise_date: These phantom units will vest as follows: (a) Tranche 1, consisting of 51,075 phantom units, will vest on the August 2026 distribution date assuming continued service through such date; (b) Tranche 2, consisting of 25,537 phantom units (assuming 100% payout at target), will potentially vest on the August 2026 distribution date at a scaled payout range of between 0% to 200% based on PAA's total shareholder return (TSR) over the three-year period ending June 30, 2026 compared to the TSR of a selected peer group (payout based on numeric rank with 100% earned at median and interpolation between ranks, and with payout being subject to reduction by up to 25 basis points, but not below 100%, if actual TSR is negative); and

F4 · derivative.exercise_date: c) Tranche 3, consisting of 25,538 phantom units (assuming 100% payout at target), will potentially vest on the August 2026 distribution date at a scaled payout range of between 0% and 200% based on PAA achieving cumulative distributable cash flow (DCF) per common unit equivalent (CUE) of $7.45 over the three-year period ending June 30, 2026 (with payout equaling 100% at cumulative DCF/CUE over such period of $7.45 and being equal to 0% for cumulative DCF/CUE over such period of $6.705 or lower and 200% for cumulative DCF/CUE over such period of $8.38125 or higher, with interpolation between such points, and with payout being subject to reduction by 25 basis points if PAA's leverage ratio (long term debt/adjusted EBITDA) as of June 30, 2026 is greater than the leverage ratio that equals the upper end of our then applicable guidance range (e.g., 3.5x is the upper end of PAA's current public guidance range of 3.0x to 3.5x)).

F5 · derivative.exercise_date: DERs associated with Tranche 1 will accrue for the first year and be paid in cash in a lump sum on the August 2024 distribution date; beginning in November 2024, DERs associated with Tranche 1 will be paid quarterly until the phantom units vest or terminate. DERs associated with Tranches 2 and 3 will accrue during the three-year vesting period and be paid in cash in a lump sum on the August 2026 distribution date with respect to each phantom unit that vests, if any, on such date. Any Tranche 2 or Tranche 3 phantom units that are determined to not have vested as of the August 2026 distribution date shall expire as of such date.

F3 · derivative.expiration_date: These phantom units will vest as follows: (a) Tranche 1, consisting of 51,075 phantom units, will vest on the August 2026 distribution date assuming continued service through such date; (b) Tranche 2, consisting of 25,537 phantom units (assuming 100% payout at target), will potentially vest on the August 2026 distribution date at a scaled payout range of between 0% to 200% based on PAA's total shareholder return (TSR) over the three-year period ending June 30, 2026 compared to the TSR of a selected peer group (payout based on numeric rank with 100% earned at median and interpolation between ranks, and with payout being subject to reduction by up to 25 basis points, but not below 100%, if actual TSR is negative); and

F4 · derivative.expiration_date: c) Tranche 3, consisting of 25,538 phantom units (assuming 100% payout at target), will potentially vest on the August 2026 distribution date at a scaled payout range of between 0% and 200% based on PAA achieving cumulative distributable cash flow (DCF) per common unit equivalent (CUE) of $7.45 over the three-year period ending June 30, 2026 (with payout equaling 100% at cumulative DCF/CUE over such period of $7.45 and being equal to 0% for cumulative DCF/CUE over such period of $6.705 or lower and 200% for cumulative DCF/CUE over such period of $8.38125 or higher, with interpolation between such points, and with payout being subject to reduction by 25 basis points if PAA's leverage ratio (long term debt/adjusted EBITDA) as of June 30, 2026 is greater than the leverage ratio that equals the upper end of our then applicable guidance range (e.g., 3.5x is the upper end of PAA's current public guidance range of 3.0x to 3.5x)).

F5 · derivative.expiration_date: DERs associated with Tranche 1 will accrue for the first year and be paid in cash in a lump sum on the August 2024 distribution date; beginning in November 2024, DERs associated with Tranche 1 will be paid quarterly until the phantom units vest or terminate. DERs associated with Tranches 2 and 3 will accrue during the three-year vesting period and be paid in cash in a lump sum on the August 2026 distribution date with respect to each phantom unit that vests, if any, on such date. Any Tranche 2 or Tranche 3 phantom units that are determined to not have vested as of the August 2026 distribution date shall expire as of such date.