UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

Plains GP Holdings, L.P.
(Name of Issuer)

COMMON STOCK
(Title of Class of Securities)

72651A207
(CUSIP Number)

Check the following box if a fee is being paid with this statement ☐. (A fee is not required only if the filing person: (1) has a previous statement on file reporting beneficial ownership of more than five percent of the class of securities described in Item 1; and (2) has filed no amendment subsequent thereto reporting beneficial ownership of five percent or less of such class.) (See Rule 13d-7.)

*The remainder of this cover page shall be filled out for a reporting person’s initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter the disclosures provided in a prior cover page.

The information required in the remainder of this cover page shall not be deemed to be “filed” for the purpose of Section 18 of the Securities Exchange Act of 1934 (“Act”) or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).

CUSIP NO. 72651A207 13G PAGE 2 OF 8 PAGES

1
NAME OF REPORTING PERSON
 
 
S.S. or I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
 
 
(A)    KAYNE ANDERSON CAPITAL ADVISORS, L.P. - 95-4486379
(B)    RICHARD A. KAYNE
 
 
 
 
2
CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
    
(a)☐
    
(b)☐
 
 
3
SEC USE ONLY
 
 
 
 
 
 
 
4
CITIZENSHIP OR PLACE OF ORGANIZATION
 
 
(A) IS A CALIFORNIA LIMITED PARTNERSHIP
(B) UNITED STATES
 
 
 
 
NUMBER OF
SHARES
BENEFICIALLY
OWNED BY
EACH REPORTING
PERSON WITH
5
SOLE VOTING POWER
 
 
(A) 0
(B) 690,673
 
 
 
 
6
SHARED VOTING POWER
 
 
(A) 8,017,789
(B) 0
 
 
 
 
7
SOLE DISPOSITIVE POWER
 
 
(A) 0
(B) 690,673
 
 
 
 
8
SHARED DISPOSITIVE POWER
 
 
(A) 8,017,789
(B) 0
 
 
 
 
9
AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON*
 
 
(A) 8,017,789
(B) 690,673
 
 
 
 
10
CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*
 
 
☐
 
 
 
 
11
PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
 
 
5.47%
 
 
 
 
12
TYPE OF REPORTING PERSON*
 
 
(A) IA
(B) IN
 
 
 
 

*SEE INSTRUCTIONS BEFORE FILLING OUT!

PAGE 2 OF 8
United States
Securities and Exchange Commission

Schedule 13G

*********************

Item 1.
(a)
 Issuer: Plains GP Holdings, L.P.  
  (b) Address: 333 Clay Street Suite #600  
      Houston, TX 77002  
         
Item 2. (a) Filing Persons: Kayne Anderson Richard A. Kayne
      Capital Advisors, L.P.  
         
  (b) Addresses: 1800 Avenue of the Stars, 1800 Avenue of the Stars,
      Third Floor
Third Floor
      Los Angeles, CA  90067 Los Angeles, CA 90067
         
  (c) Citizenship: Kayne Anderson Capital Advisors, L.P. is a California limited partnership 
      Richard A. Kayne is a U.S. Citizen  
         
  (d) Title of Class of Securities:
Common Stock
  
         
  (e) Cusip Number: 72651A207  
         
Item 3.
If this statement is filed pursuant to Rule 13d-1(b) or 13d-2(b), check whether the person filing is a:
         
  (e)
Kayne Anderson Capital Advisors, L.P., is an investment adviser registered under section 203 of the Investment Advisers Act of 1940.
         
Item 4.
Ownership
         
  (a)
Amount Beneficially Owned:
  
         
  Kayne Anderson Capital Advisors, L.P. Managed Accounts
 8,017,789
  Richard A. Kayne 690,673
 
     
 
(b)
Percent of Class:
   (A) 5.04%
        (B) 0.43%
  (c)
Number of shares as to which such person has:
  
    (i) sole power to vote or direct to vote  (A) 0
   
(B) 690,673
    (ii) shared power to vote or direct the vote
(A) 8,017,789
        (B)0
    (iii) sole power to dispose or direct the disposition  (A) 0
        (B) 690,673
    (iv) shared power to dispose or direct the disposition of   (A) 8,017,789
        (B) 0

PAGE 3 OF 8
United States
Securities and Exchange Commission

Schedule 13G

Plains GP Holdings, L.P. (Issuer)
**************************

Item 5.
Ownership of Five Percent or Less of a Class
If this statement is being filed to report the fact that as of the date hereof the reporting persons have ceased to be the beneficial owner of more than five percent of the class of securities, check the following  ☐.
Not applicable.

Item 6.
Ownership of More than Five Percent on Behalf of Another Person.
Not applicable.

Item 7.
Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on By the Parent Holding Company
Not applicable.

Item 8.
Identification and Classification of Members of the Group
Not applicable

Item 9.
Notice of Dissolution of Group
Not applicable

Item 10.
Certification
By signing below we certify that, to the best of our knowledge and belief, the securities referred to above were acquired in the ordinary course of business and were not acquired for the purpose of and do not have the effect of changing or influencing the control of the issuer of such securities and were not acquired in connection with or as a participant in any transaction having such purposes or effect.

PAGE 4 OF 8
United States
Securities and Exchange Commission

Schedule 13G

Plains GP Holdings, L.P. (Issuer)
**************************

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

January 31, 2019
 
Date  
   
/S/ RICHARD A. KAYNE
  
Richard A. Kayne
  

KAYNE ANDERSON CAPITAL ADVISORS, L.P.

By: Kayne Anderson Investment Management, Inc.
 
       
  By:
/S/ DAVID J. SHLADOVSKY
  
    David J. Shladovsky, Secretary  

PAGE 5 OF 8
JOINT FILING AGREEMENT PURSUANT TO RULE 13d-1(f)(1)

This agreement is made pursuant to Rule 13d-1(f)(1) under the Securities Exchange Act of 1934 (the “Act”) by and between the parties listed below, each referred to herein as a “Joint Filer.” The Joint Filers agree that a statement of beneficial ownership as required by Section 13(d) of the Act and the Rules thereunder may be filed on each of their behalf on Schedule 13D or Schedule 13G, as appropriate, and that said joint filing may thereafter be amended by further joint filings.  The Joint Filers state that they each satisfy the requirements for making a joint filing under Rule 13d-1.

January 31, 2019
 
Date  
   
/S/ RICHARD A. KAYNE  
Richard A. Kayne  

KAYNE ANDERSON CAPITAL ADVISORS, L.P.

By: Kayne Anderson Investment Management, Inc.
 
       
  By:
/S/ DAVID J. SHLADOVSKY
  
    David J. Shladovsky, Secretary  

PAGE 6 OF 8
United States
Securities and Exchange Commission

Schedule 13G
(cover page)
Plains GP Holdings, L.P. (Issuer)
**************************

Box 9.
The reported units are owned by investment accounts (investment limited partnerships, a registered investment company and institutional accounts) managed, with discretion to purchase or sell securities, by Kayne Anderson Capital Advisors, L.P., as a registered investment adviser.

Kayne Anderson Capital Advisors, L.P. is the general partner (or general partner of the general partner) of the limited partnerships and investment adviser to the other accounts. Richard A. Kayne is the controlling shareholder of the corporate owner of Kayne Anderson Investment Management, Inc., the general partner of Kayne Anderson Capital Advisors, L.P. Mr. Kayne is also a limited partner of each of the limited partnerships and a shareholder of the registered investment company.  Kayne Anderson Capital Advisors, L.P. disclaims beneficial ownership of the units reported, except those units attributable to it by virtue of its general partner interests in the limited partnerships.  Mr. Kayne disclaims beneficial ownership of the units reported, except those units held by him or attributable to him by virtue of his limited partnership interests in the limited partnerships, his indirect interest in the interest of Kayne Anderson Capital Advisors, L.P. in the limited partnerships, and his ownership of common stock of the registered investment company.

PAGE 7 OF 8
UNDERTAKING

The undersigned agree jointly to file the attached Statement of Beneficial Ownership on Schedule 13G with the U.S. Securities Exchange Commission and Plains GP Holdings, L.P.

Dated:  January 31, 2019

/S/ RICHARD A. KAYNE
 
Richard A. Kayne  

KAYNE ANDERSON CAPITAL ADVISORS, L.P.

By: Kayne Anderson Investment Management, Inc.
 
       
  By: /S/ DAVID J. SHLADOVSKY  
   
David J. Shladovsky, Secretary
  


PAGE 8 OF 8