FORM 4
[ ] Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).         
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES
                                                                                  
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Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940
                      

1. Name and Address of Reporting Person *

PAA GP Holdings LLC
2. Issuer Name and Ticker or Trading Symbol

PLAINS ALL AMERICAN PIPELINE LP [ PAA ]
5. Relationship of Reporting Person(s) to Issuer (Check all applicable)

__ X __ Director                      __ X __ 10% Owner
_____ Officer (give title below)      _____ Other (specify below)
(Last)          (First)          (Middle)

333 CLAY STREET, STE. 1600
3. Date of Earliest Transaction (MM/DD/YYYY)

3/28/2018
(Street)

HOUSTON, TX 77002
(City)        (State)        (Zip)
4. If Amendment, Date Original Filed (MM/DD/YYYY)

 
6. Individual or Joint/Group Filing (Check Applicable Line)

___ Form filed by One Reporting Person
_ X _ Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3)
2. Trans. Date 2A. Deemed Execution Date, if any 3. Trans. Code
(Instr. 8)
4. Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5)
5. Amount of Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 3 and 4)
6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
Code V Amount (A) or (D) Price
Common Units (Limited Partner Interests)   3/28/2018     J (1) (2)    39224   D   (1) (2) 283921024   I   By Plains AAP, L.P.   (3)

Table II - Derivative Securities Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities)
1. Title of Derivate Security
(Instr. 3)
2. Conversion or Exercise Price of Derivative Security 3. Trans. Date 3A. Deemed Execution Date, if any 4. Trans. Code
(Instr. 8)
5. Number of Derivative Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5)
6. Date Exercisable and Expiration Date 7. Title and Amount of Securities Underlying Derivative Security
(Instr. 3 and 4)
8. Price of Derivative Security
(Instr. 5)
9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares

Explanation of Responses:
(1)  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 Company Units of PAA GP Holdings LLC ("PAGP GP").
(2)  On March 28, 2018, KAFU Holdings (QP), L.P. exercised the Redemption Right with respect to 39,224 AAP Class A units, resulting in the cancellation of such AAP Class A units and the distribution of 39,224 Common Units from AAP to the redeeming partners.
(3)  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.

Reporting Owners
Reporting Owner Name / Address
Relationships
Director 10% Owner Officer Other
PAA GP Holdings LLC
333 CLAY STREET, STE. 1600
HOUSTON, TX 77002
X X

Plains AAP, L.P.
333 CLAY STREET, SUITE 1600
HOUSTON, TX 77002
X X

Plains All American GP LLC
333 CLAY STREET, SUITE 1600
HOUSTON, TX 77002
X X

PLAINS GP HOLDINGS LP
333 CLAY ST., SUITE 1600
HOUSTON, TX 77002
X X


Signatures
/s/ Ann F. Gullion, Assistant Secretary 3/29/2018
** Signature of Reporting Person Date


Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4(b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB control number.
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