
	Limited Partners
	Series A Preferred Units	Series B Preferred Units	Common Units
Outstanding at December 31, 2023	71,090,468	800,000	701,008,749

Issuances of common units under equity-indexed compensation plans	—	—	62,282
Outstanding at March 31, 2024	71,090,468	800,000	701,071,031


	Limited Partners
	Series A Preferred Units	Series B Preferred Units	Common Units
Outstanding at December 31, 2022	71,090,468	800,000	698,354,498


Issuances of common units under equity-indexed compensation plans	—	—	35,508
Outstanding at March 31, 2023	71,090,468	800,000	698,390,006

Series A Preferred Unit Distributions. Distributions on the Series A preferred units accumulate and are payable quarterly within 45 days following the end of each quarter. See Note 11 to our Consolidated Financial Statements included in Part IV of our 2023 Annual Report on Form 10-K for additional information regarding Series A preferred unit distributions. The following table details distributions to our Series A preferred unitholders paid during or pertaining to the first three months of 2024 (in millions, except per unit data):


	Series A Preferred Unitholders
Distribution Payment Date	Cash Distribution		Distribution per Unit


May 15, 2024 (1)	$	44	$	0.615
February 14, 2024	$	44	$	0.615

(1)Payable to unitholders of record at the close of business on May 1, 2024 for the period from January 1, 2024 through March 31, 2024. At March 31, 2024, such amount was accrued as distributions payable in “Other current liabilities” on our Condensed Consolidated Balance Sheet.

Series B Preferred Unit Distributions. Distributions on the Series B preferred units accumulate and are payable quarterly in arrears on the 15th day of February, May, August and November. See Note 11 to our Consolidated Financial Statements included in Part IV of our 2023 Annual Report on Form 10-K for additional information regarding Series B preferred unit distributions. The following table details distributions paid or to be paid to our Series B preferred unitholders (in millions, except per unit data):


	Series B Preferred Unitholders
Distribution Payment Date	Cash Distribution		Distribution per Unit


May 15, 2024 (1)	$	19	$	24.20
February 15, 2024	$	20	$	24.92

(1)Payable to unitholders of record at the close of business on May 1, 2024 for the period from February 15, 2024 through May 14, 2024. At March 31, 2024, approximately $10 million of accrued distributions payable to our Series B preferred unitholders was included in “Other current liabilities” on our Condensed Consolidated Balance Sheet.

Common Unit Distributions. The following table details distributions to our common unitholders paid during or pertaining to the first three months of 2024 (in millions, except per unit data):


	Distributions						Distribution per Common Unit
	Common Unitholders				Total Cash Distribution
Distribution Payment Date	Public		AAP


May 15, 2024 (1)	$	149	$	74	$	223	$	0.3175
February 14, 2024	$	149	$	74	$	223	$	0.3175

(1)Payable to unitholders of record at the close of business on May 1, 2024 for the period from January 1, 2024 through March 31, 2024.

As of March 31, 2024, noncontrolling interests in our subsidiaries consisted of (i) a 35% interest in Plains Oryx Permian Basin LLC (the “Permian JV”), (ii) a 30% interest in Cactus II Pipeline LLC (“Cactus II”) and (iii) a 33% interest in Red River Pipeline Company LLC (“Red River”).

The following table details distributions paid to noncontrolling interests during the periods presented (in millions):