Initial Statement of Beneficial Ownership (3)

FORM 3	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES	OMB APPROVAL OMB Number: 3235-0104 Estimated average burden hours per response... 0.5
	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 ^*

Warburg Pincus (Bermuda) Private Equity GP Ltd.

2. Date of Event Requiring Statement (MM/DD/YYYY) 5/20/2019

3. Issuer Name and Ticker or Trading Symbol

SemGroup Corp [SEMG]

(Last) (First) (Middle)

C/O WARBURG PINCUS & CO., 450 LEXINGTON AVENUE

4. Relationship of Reporting Person(s) to Issuer (Check all applicable)

_____ Director ___ X ___ 10% Owner
_____ Officer (give title below) _____ Other (specify below)

(Street)

NEW YORK, NY 10017

(City) (State) (Zip)

5. 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 Beneficially Owned
1.Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)

*Table II - Derivative Securities Beneficially Owned ( e.g.* , puts, calls, warrants, options, convertible securities)**
1. Title of Derivate Security (Instr. 4)	2. Date Exercisable and Expiration Date (MM/DD/YYYY)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
1. Title of Derivate Security (Instr. 4)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	4. Conversion or Exercise Price of Derivative Security		6. Nature of Indirect Beneficial Ownership (Instr. 5)
Series A Cumulative Perpetual Convertible Preferred Stock	7/19/2019	⁽⁵⁾	Class A Common Stock, $0.01 Par Value	10051574 ⁽⁵⁾	⁽³⁾	I	See Footnotes ⁽¹⁾ ⁽²⁾ ⁽³⁾ ⁽⁴⁾

Explanation of Responses:
(1)	This Form 3 is filed on behalf of WP SemGroup Holdings, L.P., a Delaware limited partnership ("WP SemGroup LP"), WP Cayman SemGroup Holdings, L.P., a Delaware limited partnership and general partner of WP SemGroup LP ("WP Cayman SemGroup LP"), Warburg Pincus (Europa) Private Equity XII (Cayman), L.P., a Cayman Islands exempted limited partnership and the general partner of WP Cayman SemGroup LP ("WP Europa PE XII LP"), Warburg Pincus (Cayman) XII, L.P., a Cayman Islands exempted limited partnership and the general partner of WP Europa PE XII LP ("WP Cayman XII LP"), Warburg Pincus (Cayman) XII GP LLC, a Delaware limited liability company and the general partner of WP Cayman XII LP ("WP Cayman XII GP LLC"), Warburg Pincus Partners II (Cayman), L.P., a Cayman Islands exempted limited partnership and sole member of WP Cayman XII GP LLC ("WPP II Cayman LP"),
(2)	(Continued from footnote 1) Warburg Pincus (Bermuda) Private Equity GP Ltd., a company registered in the Islands of Bermuda and general partner of WPP II Cayman LP ("WP Bermuda PE GP"), Charles R. Kaye and Joseph P. Landy. Messrs. Kaye and Landy are the sole Directors and Co-Chairmen of WP Bermuda PE GP.
(3)	WP SemGroup LP directly beneficially owns 300,000 shares of Series A Cumulative Perpetual Convertible Preferred Stock, par value $0.01 per share (the "Series A Preferred"), of SemGroup Corporation, a Delaware corporation (the "Company"). By reason of the provisions of Rule 16a-1of the Exchange Act, WP Cayman SemGroup LP, WP Europa PE XII LLP, WP Cayman XII LP, WP Cayman XII GP LLC, WPP II Cayman LP, WP Bermuda PE GP, Mr. Kaye and Mr. Landy may be deemed to be the beneficial owners of an indeterminate portion of the Securities that may be deemed to be beneficially owned by WP SemGroup LP. WP Cayman SemGroup LP, WP Europa PE XII LLP, WP Cayman XII LP, WP Cayman XII GP LLC, WPP II Cayman LP, WP Bermuda PE GP,
(4)	(Continued from footnote 3) Mr. Kaye and Mr. Landy may be deemed to have an indirect pecuniary interest in an indeterminate portion of the Securities that may be deemed to be beneficially owned by WP SemGroup LP. Each of WP Cayman SemGroup LP, WP Europa PE XII LLP, WP Cayman XII LP, WP Cayman XII GP LLC, WPP II Cayman LP, WP Bermuda PE GP, Mr. Kaye and Mr. Landy disclaim beneficial ownership of all Securities that may be deemed to be beneficially owned by WP SemGroup LP, except to the extent of any indirect pecuniary interest therein.
(5)	On or after July 19, 2019 (the eighteen month anniversary of the issue date of the Series A Preferred), each share of Series A Preferred is convertible into such number of shares of class A common stock of the Company, par value $0.01 ("Common Stock"), as is equal to the accreted value of such share of Series A Preferred divided by a conversion price, initially $33.00 (subject to adjustment pursuant to the terms of the Series A Certificate of Designations).

Reporting Owners
Reporting Owner Name / Address	Relationships
Reporting Owner Name / Address	Director	10% Owner	Officer	Other
Warburg Pincus (Bermuda) Private Equity GP Ltd. C/O WARBURG PINCUS & CO. 450 LEXINGTON AVENUE NEW YORK, NY 10017		X
WP SemGroup Holdings L.P. C/O WARBURG PINCUS & CO. 450 LEXINGTON AVENUE NEW YORK, NY 10017		X
WP Cayman SemGroup Holdings L.P. C/O WARBURG PINCUS & CO. 450 LEXINGTON AVENUE NEW YORK, NY 10017		X
Warburg Pincus (Europa) Private Equity XII (Cayman), L.P. C/O WARBURG PINCUS & CO. 450 LEXINGTON AVENUE NEW YORK, NY 10017		X
Warburg Pincus (Cayman) XII, L.P. C/O WARBURG PINCUS & CO. 450 LEXINGTON AVENUE NEW YORK, NY 10017		X
Warburg Pincus (Cayman) XII GP LLC C/O WARBURG PINCUS & CO. 450 LEXINGTON AVENUE NEW YORK, NY 10017		X
Warburg Pincus Partners II (Cayman), L.P. C/O WARBURG PINCUS & CO. 450 LEXINGTON AVENUE NEW YORK, NY 10017		X
KAYE CHARLES R C/O WARBURG PINCUS LLC 450 LEXINGTON AVENUE NEW YORK, NY 10017		X
Landy Joseph P. C/O WARBURG PINCUS LLC 450 LEXINGTON AVENUE NEW YORK, NY 10017		X

Signatures
WARBURG PINCUS (BERMUDA) PRIVATE EQUITY GP LTD. By: /s/ Robert B. Knauss, Name: Robert B. Knauss, Title: Authorised Signatory		7/25/2019
^** 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 5(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).
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