FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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(Print or Type Responses)

1. Name and Address of Reporting Person *   SemGroup Holdings, L.P. 2. Date of Event Requiring Statement (Month/Day/Year) 07/17/2007 3. Issuer Name and Ticker or Trading Symbol SemGroup Energy Partners, L.P. [SGLP] (Last) (First) (Middle) 6120 SOUTH YALE AVENUE, SUITE 700 4. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director __X__ 10% Owner _____ Officer (give title below) _____ Other (specify below) 5. If Amendment, Date Original Filed(Month/Day/Year) 07/17/2007 (Street) TULSA, OK 74136 6. Individual or Joint/Group Filing(Check Applicable Line) _X_ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person (City) (State) (Zip) 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)

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.			SEC 1473 (7-02)
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Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		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)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Subordinated units representing limited partner interests (1)	  (2)	  (2)	Common Units	12,570,504	$ (2)	D	Â

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
SemGroup Holdings, L.P. 6120 SOUTH YALE AVENUE SUITE 700 TULSA, OK 74136	Â	  X	Â	Â

Signatures

/s/ Alex G. Stallings, Chief Accounting Officer of SemGroup Holdings, L.P.		07/18/2007
**Signature of Reporting Person		Date

Explanation of Responses:

*	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).
(1)	This Form 3 is being filed to amend a Form 3 previously filed on July 17, 2007 reporting for ownership of SemGroup Holdings, L.P. on July 17, 2007. The amount of subordinated units representing limited partner interests is amended to read 12,570,504.
(2)	Each subordinated unit will convert into one common unit at the end of the subordination period, which will end if the Issuer has earned and paid at $1.25 on each outstanding common unit and general partner unit for any three consecutive, non-overlapping four-quarter periods ending on or after the date specified in the partnership agreement, but may end sooner if the Issuer meets additional financial tests as described in the partnership agreement. The subordinated units have no expiration date.

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