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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1489136	Semgroup Corp	SEMG	Oil & Gas Field Services, Nec (1389)	203533152

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1384631	Morrison Sarah Barpoulis	Two Warren Place, 6120 South Yale Ave. Suite 700 Tulsa OK 74136		Yes	No	No	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Common Stock	Disposition	2012-06-07	11,097	$0.00	2,556	No	5	G	Direct
Common Stock	Acquisiton	2012-06-07	11,097	$0.00	11,097	No	5	G	Indirect	Held in Trust
Common Stock	Disposition	2012-06-08	1,240	$29.79	9,857	No	4	S	Indirect	Held in Trust

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	5	G	Direct
No	5	G	Indirect	Held in Trust
No	4	S	Indirect	Held in Trust

Footnotes

Shares held of record by the Sarah M. Barpoulis Living Trust, dtd 9/17/2003 of which Ms. Barpoulis and her husband are co-trustees. Each trustee has independent control and voting power over the Trust.
These shares were sold to cover the individuals tax obligations arising from the vesting of shares of restricted stock granted under the SemGroup Corporation Equity Incentive Plan.
This transaction was executed in multiple trades on June 8, 2012 at prices ranging from $29.7673 to $29.83. The price reported above reflects the weighted average sold price. The reporting person hereby undertakes to provide to the Commission staff, the issuer or a security holder of the issuer, upon request, full information regarding the number of shares sold at each separate price.