X0306 4 2018-11-12 0001547638 Southcross Energy Partners, L.P. SXE 0001672441 TW Southcross Aggregator LP 2021 MCKINNEY AVE. SUITE 1250 DALLAS TX 75201 true 0001615852 TW/LM GP Sub, LLC 2021 MCKINNEY AVE. SUITE 1250 DALLAS TX 75201 true 0001615839 TAILWATER ENERGY FUND I, LP 2021 MCKINNEY AVE. SUITE 1250 DALLAS TX 75201 true 0001615835 TW GP EF-1, LP 2021 MCKINNEY AVE. SUITE 1250 DALLAS TX 75201 true 0001615863 TW GP EF-1 GP, LLC 2021 MCKINNEY AVE. SUITE 1250 DALLAS TX 75201 true 0001642559 TW GP Holdings, LLC 2021 MCKINNEY AVE. SUITE 1250 DALLAS TX 75201 true 0001642558 Tailwater Holdings, LP 2021 MCKINNEY AVE. SUITE 1250 DALLAS TX 75201 true 0001615830 Tailwater Capital LLC 2021 MCKINNEY AVE. SUITE 1250 DALLAS TX 75201 true 0001351303 Downie Jason H 2021 MCKINNEY AVE. SUITE 1250 DALLAS TX 75201 true 0001483120 Herring Edward 2021 MCKINNEY AVE. SUITE 1250 DALLAS TX 75201 true Class B Convertible Units 2018-11-12 4 J 0 338034 A Common Units (Limited Partnership Interests) 19652831 I By Southcross Holdings Borrower LP The Class B Convertible Units were acquired by Southcross Holdings Borrower LP ("Borrower") as a payment-in-kind distribution on outstanding Class B Convertible Units pursuant to the Issuer's Third Amended and Restated Agreement of Limited Partnership dated August 4, 2014 (the "Partnership Agreement"). The Class B Convertible Units convert into Common Units at the Class B Conversion Rate (as defined in the Partnership Agreement) on the Class B Conversion Date (as defined in the Partnership Agreement). See Exhibit 99.1 TW Southcross Aggregator LP, a Delaware limited partnership By: TW/LM GP Sub, LLC, its General Partner By: /s/ Brian Blakeman, Vice President Tax & Finance 2018-11-13 TW/LM GP Sub. LLC, a Texas limited liability company By: /s/ Brian Blakeman, Vice President Tax & Finance 2018-11-13 Tailwater Energy Fund I, LP, a Delaware limited partnership By: TW GP EF-I, LP, its General Partner By: TW GP EF-I GP, LLC, its General Partner By: /s/ Brian Blakeman, Vice President Tax & Finance 2018-11-13 TW GP EF-I, LP, a Delaware limited partnership By: TW GP EF-I GP, LLC, its General Partner By: /s/ Brian Blakeman, Vice President Tax & Finance 2018-11-13 TW GP EF-I GP, LLC, a Texas limited liability company By: /s/ Brian Blakeman, Vice President Tax & Finance 2018-11-13 TAILWATER HOLDINGS, LP, a Delaware limited partnership By: TW GP Holdings, LLC, its General Partner By: /s/ Brian Blakeman, Vice President 2018-11-13 TW GP HOLDINGS, LLC, a Texas limited liability company By: /s/ Brian Blakeman, Vice President 2018-11-13 TAILWATER CAPITAL LLC, a Texas limited liability company By: /s/ Brian Blakeman, Vice President Tax & Finance 2018-11-13 /s/ Jason H. Downie 2018-11-13 /s/ Edward Herring 2018-11-13