13D Filing: Magnolia Infrastructure Holdings, LLC and American Midstream Partners LP (AMID)

Note 1: Represents 7,376,568 Series A-1 Convertible Preferred Units (Series A-1 Units) held by High Point
Infrastructure Partners, LLC (High Point), convertible into 8,227,824 common units of the Issuer (Common Units), which are indirectly owned by Magnolia Infrastructure Partners, LLC (Magnolia),
3,160,347 Series A-2 Convertible Preferred Units (Series A-2 Units) held by Magnolia, convertible into 3,525,051 Common Units, 8,792,205 Series C Convertible Preferred Units (Series C Units) held directly by
Magnolia Infrastructure Holdings, LLC (Magnolia Holdings), convertible into 8,925,847 Common Units, 9,753,425 Common Units held directly by Magnolia Holdings 1,349,609 Common Units held by American Midstream GP, LLC, which is
approximately 77% owned by High Point and approximately 23% owned by AMID GP Holdings, LLC, a wholly owned subsidiary of Magnolia Holdings, and 618,921 Common Units held by Magnolia, taking into account the transactions discussed in Item 3.

Note 2: Based on 72,438,509 Common Units outstanding, on an as-converted basis, which equals the sum of (a) 51,759,787 Common Units outstanding as of
August 3, 2017, (b) 8,227,824 Common Units issuable upon the conversion of Series A-1 Units outstanding, (c) 3,525,051 Common Units issuable upon the conversion of Series A-2 Units outstanding and (d) 8,925,847 Common Units issuable upon the
conversion of Series C Units outstanding.

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