Crude Oil ( ) Brent Crude ( ) Natural Gas ( ) S&P 500 ( ) PHLX Oil ( )

American Midstream Declares Quarterly Distribution

American Midstream Partners, LP (AMID) today announced that the Board of Directors of its general partner declared a quarterly cash distribution of $0.4725 per common unit, or $1.89 per unit on an annualized basis. The first quarter 2015 distribution remains unchanged from the previous quarter and represents an increase of $0.01 per unit, or 2.2 percent, compared to the distribution for the first quarter 2014.

The distribution will be paid May 15, 2015, to unitholders of record as of the close of business May 7, 2015, together with the general partner of American Midstream Partners, LP. The ex-dividend date is May 5, 2015.

About American Midstream Partners, LP

Denver-based American Midstream Partners, LP is a growth-oriented limited partnership formed to own, operate, develop and acquire a diversified portfolio of midstream energy assets. The Partnership provides midstream services in Texas, North Dakota, and the Gulf Coast and Southeast regions of the United States. For more information about American Midstream Partners, LP, visit www.AmericanMidstream.com.

The Partnership filed its Annual Report on Form 10-K for the year ended December 31, 2014 on March 10, 2015 with the Securities and Exchange Commission. A copy of the annual report, which contains the Partnership’s audited financial statements, is available for viewing and downloading on the Partnership’s website at www.AmericanMidstream.com. Investors can receive, free of charge, a hard copy of the annual report by emailing ir@americanmidstream.comor submitting a written request to American Midstream Partners, LP Attention: Investor Relations 1400 16th Street, Suite 310, Denver, CO 80202.

Forward Looking Statements

This press release includes forward-looking statements. These statements relate to, among other things, expected closing of acquisitions, growth projects, cash flows and capital expenditures. We have used the words “anticipate,” “believe,” “could,” “estimate,” “expect,” “intend,” “may,” “plan,” “predict,” “project,” “should,” “will,” “potential,” and similar terms and phrases to identify forward-looking statements in this press release. Although we believe the assumptions upon which these forward-looking statements are based are reasonable, any of these assumptions could prove to be inaccurate and the forward-looking statements based on these assumptions could be incorrect. Our operations and future growth involve risks and uncertainties, many of which are outside our control, and any one of which, or a combination of which, could materially affect our results of operations and whether the forward-looking statements ultimately prove to be correct. Actual results and trends in the future may differ materially from those suggested or implied by the forward-looking statements depending on a variety of factors which are described in greater detail in our filings with the SEC. Please see our Risk Factor disclosures included in our Annual Report on Form 10-K for the year ended December 31, 2014 filed on March 10, 2015. All future written and oral forward-looking statements attributable to us or persons acting on our behalf are expressly qualified in their entirety by the previous statements. The forward-looking statements herein speak as of the date of this press release. We undertake no obligation to update any information contained herein or to publicly release the results of any revisions to any forward-looking statements that may be made to reflect events or circumstances that occur, or that we become aware of, after the date of this press release.

This release serves as qualified notice to nominees as provided for under Treasury Regulation Section 1.1446-4(b)(4) and (d). Please note that 100 percent of American Midstream Partners, LP’s distributions to foreign investors are attributable to income that is effectively connected with a United States trade or business. Accordingly, all of American Midstream Partners, LP’s distributions to foreign investors are subject to federal income tax withholding at the highest effective tax rate for individuals or corporations, as applicable. Nominees, and not American Midstream Partners, LP, are treated as withholding agents responsible for withholding distributions received by them on behalf of foreign investors.