SemGroup Corporation Announces Pricing of $300 Million of 7.5% Senior Notes

SemGroup Corporation Announces Pricing of $300 Million of 7.5% Senior Notes

TULSA, Okla., June 7, 2013 (GLOBE NEWSWIRE) -- SemGroup^® Corporation
(NYSE:SEMG) (SemGroup) today announced the pricing of an offering of $300
million in aggregate principal amount of senior unsecured notes due 2021 (the
Notes) for sale in a private placement to eligible purchasers. The 7.5% Notes
will mature on June 15, 2021, and are being issued at par. SemGroup
anticipates that consummation of the offering will occur on June 14, 2013,
subject to the satisfaction of customary closing conditions, and intends to
use a portion of the net proceeds from the offering to fund the acquisition of
Mid-America Midstream Gas Services, L.L.C., a subsidiary of Chesapeake Energy
Corporation (the Acquisition) and to repay amounts borrowed under SemGroup's
corporate revolving credit facility. If, for any reason, the Acquisition does
not close, the net proceeds will be used for general corporate purposes.

This press release is neither an offer to sell nor a solicitation of an offer
to buy the Notes or any other securities and shall not constitute an offer,
solicitation or sale in any jurisdiction in which such offer, solicitation or
sale is unlawful. The Notes and the guarantees thereof have not been
registered under the Securities Act of 1933, as amended (the Securities Act),
or any state securities laws and may not be offered or sold in the United
States absent registration or applicable exemption from the registration
requirements under the Securities Act and applicable state securities laws.
The Notes are expected to be offered and sold only to qualified institutional
buyers pursuant to Rule 144A under the Securities Act and to non-U.S. persons
outside of the United States pursuant to Regulation S under the Securities
Act. This press release is being issued in accordance with Rule 135c under the
Securities Act.

Forward-Looking Statements

Certain matters contained in this press release include "forward-looking
statements" within the meaning of Section 27A of the Securities Act and
Section 21E of the Securities Exchange Act of 1934, as amended. We make these
forward-looking statements in reliance on the safe harbor protections provided
under the Private Securities Litigation Reform Act of 1995.

All statements, other than statements of historical fact, included in this
press release, including regarding the closing of the offering of the Notes,
the expected use of proceeds from such offering and the closing of the
Acquisition, may constitute forward-looking statements. Although we believe
that the expectations reflected in these forward-looking statements are
reasonable, we cannot assure you that these expectations will prove to be
correct. These forward-looking statements are subject to certain known and
unknown risks and uncertainties, as well as assumptions that could cause
actual results to differ materially from those reflected in these
forward-looking statements. Factors that might cause actual results to differ
include, but are not limited to, any of the factors discussed from time to
time in each of our documents and reports filed with the Securities and
Exchange Commission.

Readers are cautioned not to place undue reliance on any forward-looking
statements contained in this press release, which reflect management's
opinions only as of the date hereof. Except as required by law, we undertake
no obligation to revise or publicly release the results of any revision to any
forward-looking statements.

CONTACT: Investor Relations:
         Mary Catherine Ward
         Kiley Roberson

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