X0306 4 2016-04-25 0 0001513965 American Midstream Partners, LP AMID 0001502553 ARCLIGHT ENERGY PARTNERS FUND V, L.P. C/O ARCLIGHT CAPITAL PARTNERS, LLC 200 CLARENDON STREET, 55TH FLOOR BOSTON MA 02117 1 0 1 1 SEE REMARKS 0001526603 American Midstream GP, LLC ATTENTION: WILLIAM B. MATHEWS 1400 16TH STREET, SUITE 310 DENVER CO 80202 1 0 1 0 0001441290 ArcLight Capital Holdings, LLC C/O ARCLIGHT CAPITAL PARTNERS, LLC 200 CLARENDON STREET, 55TH FLOOR BOSTON MA 02117 1 0 1 0 0001502945 ArcLight Capital Partners, LLC 200 CLARENDON STREET, 55TH FLOOR BOSTON MA 02117 1 0 1 0 0001405456 Revers Daniel R C/O ARCLIGHT CAPITAL PARTNERS, LLC 200 CLARENDON STREET, 55TH FLOOR BOSTON MA 02117 1 0 1 0 0001673060 Magnolia Infrastructure Holdings, LLC C/O ARCLIGHT CAPITAL PARTNERS, LLC 200 CLARENDON STREET, 55TH FLOOR BOSTON MA 02117 1 0 1 0 0001638285 Magnolia Infrastructure Partners, LLC C/O ARCLIGHT CAPITAL PARTNERS, LLC 200 CLARENDON STREET, 55TH FLOOR BOSTON MA 02117 1 0 1 0 0001575227 High Point Infrastructure Partners, LLC C/O ARCLIGHT CAPITAL PARTNERS, LLC 200 CLARENDON STREET, 55TH FLOOR BOSTON MA 02117 1 0 1 0 Series C Convertible Preferred Units 2016-04-25 4 P 0 8571429 14.00 A Common Units 8571429 8571429 I See Footnote Warrant 7.25 2016-04-25 4 P 0 800000 A 2016-04-25 2023-04-25 Common Units 800000 800000 I See Footnote Represents Series C Convertible Preferred Units (the "Series C Units") purchased by Magnolia Infrastructure Holdings, LLC ("Magnolia Holdings"). The Series C Units have no expiration date and are convertible into common units of the Issuer at anytime at the holder's election, initially on a one-for-one basis, subject to anti-dilution and certain other adjustments. Subject to certain restrictions, the Issuer may exercise the right to require Magnolia Holdings to sell, assign and transfer all or a portion of the then outstanding Series C Units to the Issuer. ArcLight Energy Partners Fund V, L.P. ("Fund V") directly owns Magnolia Holdings. As an inducement to enter into that certain Securities Purchase Agreement, dated April 25, 2016, the Issuer has agreed to issue to Magnolia Holdings a warrant to purchase up to 800,000 Common Units of the Issuer (subject to adjustment in accordance with the warrant) at an exercise price of $7.25 per Common Unit. ArcLight Capital Holdings, LLC ("ArcLight Holdings") is the sole manager and member of ArcLight Capital Partners, LLC ("ArcLight Partners" and, together with ArcLight Holdings and Fund V, the "ArcLight Entities"). ArcLight Partners is the investment adviser to Fund V. ArcLight Holdings is the manager of the general partner of Fund V. Mr. Revers is a manager of ArcLight Holdings and a managing partner of ArcLight Partners and has certain voting and dispositive rights as a member of ArcLight Partners' investment committee. Fund V directly owns Busbar II, LLC ("Busbar") and Magnolia Holdings, which owns Magnolia Infrastructure Partners, LLC ("Magnolia"). Fund V, through indirectly controlled subsidiaries, also owns approximately 90% of the ownership interest in High Point Infrastructure Partners, LLC ("HPIP"), which in turn owns 95% of American Midstream GP, LLC (the "General Partner"). As a result, the ArcLight Entities and Mr. Revers may be deemed to indirectly beneficially own the securities of the Issuer held by Magnolia Holdings, Busbar, Magnolia, HPIP and the General Partner, but disclaim beneficial ownership except to the extent of their respective pecuniary interests therein. /s/ Daniel R. Revers, MAGNOLIA INFRASTRUCTURE PARTNERS, LLC, By: Daniel R. Revers, President 2016-04-27 /s/ Daniel R. Revers, MAGNOLIA INFRASTRUCTURE HOLDINGS, LLC, By: Daniel R. Revers, President 2016-04-27 /s/ Daniel R. Revers, HIGH POINT INFRASTRUCTURE PARTNERS, LLC, By: Daniel R. Revers, President 2016-04-27 /s/ William B. Mathews, AMERICAN MIDSTREAM GP, LLC, By: William B. Mathews, Senior Vice President 2016-04-27 /s/ Daniel R. Revers, ARCLIGHT CAPITAL HOLDINGS, LLC, By: Daniel R. Revers, Managing Partner 2016-04-27 /s/ Daniel R. Revers, ARCLIGHT CAPITAL PARTNERS, LLC, By: Daniel R. Revers, Managing Partner 2016-04-27 /s/ Daniel R. Revers, ARCLIGHT ENERGY PARTNERS FUND V, L.P., By: ArcLight PEF GP V, LLC, its General Partner, By: ArcLight Capital Holdings, LLC, its Manager, By: Daniel R. Revers, Managing Partner 2016-04-27 /s/ Daniel R. Revers 2016-04-27