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Magnolia Infrastructure Holdings, LLC

Disclosed activity across 2 companies

Tapewire entity
155871
SEC CIK
0001673060

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Reported relationships

Latest disclosed role at each company.

No relationships currently tracked through insider filings.

Disclosed balances

About these balances

Latest available filing per company, not a reconstructed current portfolio. Matching sequences show the last reported balance with all source rows expandable; grouping alone does not establish account ownership. Do not add unresolved positions together. Filings may omit unchanged positions, and amendments may correct only part of an older disclosure. Jointly reported shares are not necessarily this owner's personal holdings.

No balances currently tracked through insider filings.

Past disclosures · reporting ended (2)

No longer tracked through insider filings. These historical balances do not imply present ownership or a zero position.

Section 16 reporting ended · disclosed 2017-03-09. Current position is not established by this disclosure.

Security / awardOwnership accountDisclosed shares / unitsDisclosure context
COMMON UNITS (LIMITED PARTNER INTERESTS)SEC Table I · non-derivativeDirect0 Reported balance After 2017-03-08 transaction · row 1 Joint disclosure: continuity of the reported position is unresolved; see ownership footnotes.
1 source row

Row 1 · 2017-03-08 · Disposition to issuer · Disposed 3,674,187 · Balance 0

F1: Converted into common units of American Midstream Partners, LP ("AMID") in connection with the merger of the issuer into a wholly-owned subsidiary of AMID effective on March 8, 2017 (the "Merger"). On March 7, 2017, the last trading day of the issuer's common units, the closing price of issuer common units was $9.44 per unit and the closing price of AMID's common units was $16.45 per unit. Each issuer common unit outstanding held by the reporting person was converted into 0.5225 AMID common units at the effective time of the Merger.

F2: This Form 4 is filed jointly by Magnolia Infrastructure Holdings, LLC ("Magnolia", as successor by merger to AL Lonestar, LLC, as successor by merger to Lonestar Midstream Holdings, LLC), ArcLight Capital Partners, LLC ("ArcLight Partners"), ArcLight Capital Holdings, LLC ("ArcLight Holdings"), ArcLight Energy Partners Fund V, L.P. ("ArcLight Fund V" and together with ArcLight Partners and ArcLight Holdings, the "ArcLight Entities") and Daniel R. Revers. Prior to the closing of the Merger, Magnolia owned 100% of the interests in JP Energy GP II LLC, the issuer's general partner (the "General Partner"), and was deemed to indirectly beneficially own the securities held by the General Partner, but disclaimed beneficial ownership except to the extent of its pecuniary interest therein. (Continued in Footnote 3)

F3: (Continued from Footnote 2) The General Partner holds a non-economic general partner interest in the issuer. Prior to the closing of the Merger, ArcLight Fund V owned and controlled, through one of its wholly owned subsidiaries, Magnolia, and therefore may have been deemed to indirectly beneficially own the securities held directly and indirectly by Magnolia. Mr. Revers is a director of the General Partner and is managing partner of ArcLight Partners. ArcLight Partners is the investment manager of, and ArcLight Holdings is the managing partner of the general partner of, ArcLight Fund V. Due to certain voting rights granted to Mr. Revers as a member of ArcLight Partners' investment committee, he may be deemed to indirectly beneficially own the units held by Magnolia. Each of the ArcLight Entities and Mr. Revers disclaims beneficial ownership of the securities held directly or indirectly by Magnolia except to the extent of their respective pecuniary interests therein.

SUBORDINATED UNITS (LIMITED PARTNER INTERESTS)SEC Table II · derivative / convertible securityDirect0 Reported balance After 2017-03-08 transaction · row 2 Instrument identity requires review; Table II rows are not merged.
1 source row

Row 2 · 2017-03-08 · Disposition to issuer · Disposed 14,992,654 · Balance 0

F4: Each subordinated unit is the economic equivalent of one common unit. Each subordinated unit outstanding held by the reporting person was converted into the right to receive 0.5225 AMID common units at the effective time of the Merger.

F2: This Form 4 is filed jointly by Magnolia Infrastructure Holdings, LLC ("Magnolia", as successor by merger to AL Lonestar, LLC, as successor by merger to Lonestar Midstream Holdings, LLC), ArcLight Capital Partners, LLC ("ArcLight Partners"), ArcLight Capital Holdings, LLC ("ArcLight Holdings"), ArcLight Energy Partners Fund V, L.P. ("ArcLight Fund V" and together with ArcLight Partners and ArcLight Holdings, the "ArcLight Entities") and Daniel R. Revers. Prior to the closing of the Merger, Magnolia owned 100% of the interests in JP Energy GP II LLC, the issuer's general partner (the "General Partner"), and was deemed to indirectly beneficially own the securities held by the General Partner, but disclaimed beneficial ownership except to the extent of its pecuniary interest therein. (Continued in Footnote 3)

F3: (Continued from Footnote 2) The General Partner holds a non-economic general partner interest in the issuer. Prior to the closing of the Merger, ArcLight Fund V owned and controlled, through one of its wholly owned subsidiaries, Magnolia, and therefore may have been deemed to indirectly beneficially own the securities held directly and indirectly by Magnolia. Mr. Revers is a director of the General Partner and is managing partner of ArcLight Partners. ArcLight Partners is the investment manager of, and ArcLight Holdings is the managing partner of the general partner of, ArcLight Fund V. Due to certain voting rights granted to Mr. Revers as a member of ArcLight Partners' investment committee, he may be deemed to indirectly beneficially own the units held by Magnolia. Each of the ArcLight Entities and Mr. Revers disclaims beneficial ownership of the securities held directly or indirectly by Magnolia except to the extent of their respective pecuniary interests therein.

Filing footnotes · ownership attribution and instrument terms

F1: Converted into common units of American Midstream Partners, LP ("AMID") in connection with the merger of the issuer into a wholly-owned subsidiary of AMID effective on March 8, 2017 (the "Merger"). On March 7, 2017, the last trading day of the issuer's common units, the closing price of issuer common units was $9.44 per unit and the closing price of AMID's common units was $16.45 per unit. Each issuer common unit outstanding held by the reporting person was converted into 0.5225 AMID common units at the effective time of the Merger.

F2: This Form 4 is filed jointly by Magnolia Infrastructure Holdings, LLC ("Magnolia", as successor by merger to AL Lonestar, LLC, as successor by merger to Lonestar Midstream Holdings, LLC), ArcLight Capital Partners, LLC ("ArcLight Partners"), ArcLight Capital Holdings, LLC ("ArcLight Holdings"), ArcLight Energy Partners Fund V, L.P. ("ArcLight Fund V" and together with ArcLight Partners and ArcLight Holdings, the "ArcLight Entities") and Daniel R. Revers. Prior to the closing of the Merger, Magnolia owned 100% of the interests in JP Energy GP II LLC, the issuer's general partner (the "General Partner"), and was deemed to indirectly beneficially own the securities held by the General Partner, but disclaimed beneficial ownership except to the extent of its pecuniary interest therein. (Continued in Footnote 3)

F3: (Continued from Footnote 2) The General Partner holds a non-economic general partner interest in the issuer. Prior to the closing of the Merger, ArcLight Fund V owned and controlled, through one of its wholly owned subsidiaries, Magnolia, and therefore may have been deemed to indirectly beneficially own the securities held directly and indirectly by Magnolia. Mr. Revers is a director of the General Partner and is managing partner of ArcLight Partners. ArcLight Partners is the investment manager of, and ArcLight Holdings is the managing partner of the general partner of, ArcLight Fund V. Due to certain voting rights granted to Mr. Revers as a member of ArcLight Partners' investment committee, he may be deemed to indirectly beneficially own the units held by Magnolia. Each of the ArcLight Entities and Mr. Revers disclaims beneficial ownership of the securities held directly or indirectly by Magnolia except to the extent of their respective pecuniary interests therein.

F4: Each subordinated unit is the economic equivalent of one common unit. Each subordinated unit outstanding held by the reporting person was converted into the right to receive 0.5225 AMID common units at the effective time of the Merger.

Section 16 reporting ended · disclosed 2019-07-24. Current position is not established by this disclosure.

Security / awardOwnership accountDisclosed shares / unitsDisclosure context
Common Units (limited partner interests)SEC Table I · non-derivativeIndirectSee footnote0 Reported balance After 2019-07-23 transaction · row 1 Joint disclosure: continuity of the reported position is unresolved; see ownership footnotes.
1 source row

Row 1 · 2019-07-23 · Disposition to issuer · Disposed 42,514,126 · Balance 0

F1: Represents common units representing limited partnership interests (the "Common Units") of Third Coast Midstream, LLC (f/k/a American Midstream Partners, LP), a Delaware limited liability company (the "Issuer").

F2: Pursuant to that certain Master Contribution Agreement, dated July 22, 2019, by and among Anchor Midstream Acquisition, LLC, a Delaware limited liability company ("Anchor Acquisition"), 3CM Holdings, LLC (f/k/a High Point Infrastructure Partners, LLC), a Delaware limited liability company ("3CM"), Third Coast Midstream Holdings, LLC (f/k/a/ American Midstream GP, LLC), a Delaware limited liability company (the "General Partner"), Magnolia Infrastructure Holdings, LLC, a Delaware limited liability company ("Magnolia Holdings"), Magnolia Infrastructure Partners, LLC, a Delaware limited liability company ("Magnolia"), AMID GP Holdings, LLC, a Delaware limited liability company ("AMID GP"), JP Energy Development, L.P., a Delaware limited partnership ("JP Energy"), Busbar II, LLC, a Delaware limited liability company ("Busbar"), High Point Energy, LLC, a Texas limited liability company, ArcLight Energy Partners Fund V, L.P.,

F3: (continued from footnote 2) a Delaware limited partnership ("Fund V"), Stephen W. Bergstrom, individually ("Bergstrom") and Daniel C. Campbell, individually, (i) JP Energy, as holder of 422,805 Common Units, transferred all of its Common Units to Magnolia Holdings, (ii) Magnolia Holdings, as holder of 20,372,720 Common Units, transferred all of its Common Units to the General Partner, (iii) Magnolia, as holder of 5,108,669 Common Units, transferred all of its Common Units to the General Partner, (iv) Busbar, as holder of 2,853,482 Common Units, transferred all of its Common Units to the General Partner and (v) Bergstrom, as holder of 64,221 Common Units, transferred all of his Common Units to the General Partner. Immediately following the preceding transactions, the General Partner, as holder of 41,209,117 Common Units, transferred all of its Common Units to Anchor Acquisition.

F4: On July 23, 2019, pursuant to a Plan of Conversion adopted by the Issuer, the Issuer converted into a Delaware limited liability company named "Third Coast Midstream, LLC" ("Third Coast Midstream" and, such conversion, the "AMID Conversion"). In connection with the AMID Conversion, each Common Unit issued and outstanding immediately prior to the AMID Conversion was converted into one limited liability company unit of Third Coast Midstream. Magnolia Holdings also beneficially owns 1,369,230 Common Units issuable upon exercise of the warrants issued to Magnolia Holdings by the Issuer, dated July 18, 2019. After the AMID Conversion, all of the outstanding warrants converted into the right to receive 1,369,230 limited liability company units of Third Coast Midstream. As a result of the AMID Conversion, all Common Units were cancelled and ceased to be outstanding and none of JP Energy, Magnolia Holdings, Magnolia and Busbar beneficially own any Common Units.

Filing footnotes · ownership attribution and instrument terms

F1: Represents common units representing limited partnership interests (the "Common Units") of Third Coast Midstream, LLC (f/k/a American Midstream Partners, LP), a Delaware limited liability company (the "Issuer").

F2: Pursuant to that certain Master Contribution Agreement, dated July 22, 2019, by and among Anchor Midstream Acquisition, LLC, a Delaware limited liability company ("Anchor Acquisition"), 3CM Holdings, LLC (f/k/a High Point Infrastructure Partners, LLC), a Delaware limited liability company ("3CM"), Third Coast Midstream Holdings, LLC (f/k/a/ American Midstream GP, LLC), a Delaware limited liability company (the "General Partner"), Magnolia Infrastructure Holdings, LLC, a Delaware limited liability company ("Magnolia Holdings"), Magnolia Infrastructure Partners, LLC, a Delaware limited liability company ("Magnolia"), AMID GP Holdings, LLC, a Delaware limited liability company ("AMID GP"), JP Energy Development, L.P., a Delaware limited partnership ("JP Energy"), Busbar II, LLC, a Delaware limited liability company ("Busbar"), High Point Energy, LLC, a Texas limited liability company, ArcLight Energy Partners Fund V, L.P.,

F3: (continued from footnote 2) a Delaware limited partnership ("Fund V"), Stephen W. Bergstrom, individually ("Bergstrom") and Daniel C. Campbell, individually, (i) JP Energy, as holder of 422,805 Common Units, transferred all of its Common Units to Magnolia Holdings, (ii) Magnolia Holdings, as holder of 20,372,720 Common Units, transferred all of its Common Units to the General Partner, (iii) Magnolia, as holder of 5,108,669 Common Units, transferred all of its Common Units to the General Partner, (iv) Busbar, as holder of 2,853,482 Common Units, transferred all of its Common Units to the General Partner and (v) Bergstrom, as holder of 64,221 Common Units, transferred all of his Common Units to the General Partner. Immediately following the preceding transactions, the General Partner, as holder of 41,209,117 Common Units, transferred all of its Common Units to Anchor Acquisition.

F4: On July 23, 2019, pursuant to a Plan of Conversion adopted by the Issuer, the Issuer converted into a Delaware limited liability company named "Third Coast Midstream, LLC" ("Third Coast Midstream" and, such conversion, the "AMID Conversion"). In connection with the AMID Conversion, each Common Unit issued and outstanding immediately prior to the AMID Conversion was converted into one limited liability company unit of Third Coast Midstream. Magnolia Holdings also beneficially owns 1,369,230 Common Units issuable upon exercise of the warrants issued to Magnolia Holdings by the Issuer, dated July 18, 2019. After the AMID Conversion, all of the outstanding warrants converted into the right to receive 1,369,230 limited liability company units of Third Coast Midstream. As a result of the AMID Conversion, all Common Units were cancelled and ceased to be outstanding and none of JP Energy, Magnolia Holdings, Magnolia and Busbar beneficially own any Common Units.

Transaction history

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Purchases/sales include open-market and private transactions. Plan disclosure applies to the filing; individual rows may differ. “Not disclosed” is not “unplanned.”

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Transaction dateCompanyActivity / securityShares / unitsReported priceReported valueDetails
July 23, 2019 Filed Jul 24, 2019 16:52 UTC Third Coast Midstream, LLC AMID · Entity 155869 Disposition to issuerCommon Units (limited partner interests) 42,514,126 $0.00 $0.00
Disclosure

SEC source: 0000899243-19-020240 · doc4.xml · nonDerivative · entry 1

ARCLIGHT ENERGY PARTNERS FUND V, L.P. · CIK 0001502553 · Director · 10% owner · SEE REMARKS

Magnolia Infrastructure Holdings, LLC · CIK 0001673060 · Director · 10% owner

Magnolia Infrastructure Partners, LLC · CIK 0001638285 · Director · 10% owner

American Midstream GP, LLC · CIK 0001526603 · Director · 10% owner

High Point Infrastructure Partners, LLC · CIK 0001575227 · Director · 10% owner

AMID GP Holdings, LLC · CIK 0001715051 · Director · 10% owner

ArcLight Capital Holdings, LLC · CIK 0001441290 · Director · 10% owner

ArcLight Capital Partners, LLC · CIK 0001502945 · Director · 10% owner

Revers Daniel R · CIK 0001405456 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 0

F1 · shares: Represents common units representing limited partnership interests (the "Common Units") of Third Coast Midstream, LLC (f/k/a American Midstream Partners, LP), a Delaware limited liability company (the "Issuer").

F2 · balance_after: Pursuant to that certain Master Contribution Agreement, dated July 22, 2019, by and among Anchor Midstream Acquisition, LLC, a Delaware limited liability company ("Anchor Acquisition"), 3CM Holdings, LLC (f/k/a High Point Infrastructure Partners, LLC), a Delaware limited liability company ("3CM"), Third Coast Midstream Holdings, LLC (f/k/a/ American Midstream GP, LLC), a Delaware limited liability company (the "General Partner"), Magnolia Infrastructure Holdings, LLC, a Delaware limited liability company ("Magnolia Holdings"), Magnolia Infrastructure Partners, LLC, a Delaware limited liability company ("Magnolia"), AMID GP Holdings, LLC, a Delaware limited liability company ("AMID GP"), JP Energy Development, L.P., a Delaware limited partnership ("JP Energy"), Busbar II, LLC, a Delaware limited liability company ("Busbar"), High Point Energy, LLC, a Texas limited liability company, ArcLight Energy Partners Fund V, L.P.,

F3 · balance_after: (continued from footnote 2) a Delaware limited partnership ("Fund V"), Stephen W. Bergstrom, individually ("Bergstrom") and Daniel C. Campbell, individually, (i) JP Energy, as holder of 422,805 Common Units, transferred all of its Common Units to Magnolia Holdings, (ii) Magnolia Holdings, as holder of 20,372,720 Common Units, transferred all of its Common Units to the General Partner, (iii) Magnolia, as holder of 5,108,669 Common Units, transferred all of its Common Units to the General Partner, (iv) Busbar, as holder of 2,853,482 Common Units, transferred all of its Common Units to the General Partner and (v) Bergstrom, as holder of 64,221 Common Units, transferred all of his Common Units to the General Partner. Immediately following the preceding transactions, the General Partner, as holder of 41,209,117 Common Units, transferred all of its Common Units to Anchor Acquisition.

F4 · balance_after: On July 23, 2019, pursuant to a Plan of Conversion adopted by the Issuer, the Issuer converted into a Delaware limited liability company named "Third Coast Midstream, LLC" ("Third Coast Midstream" and, such conversion, the "AMID Conversion"). In connection with the AMID Conversion, each Common Unit issued and outstanding immediately prior to the AMID Conversion was converted into one limited liability company unit of Third Coast Midstream. Magnolia Holdings also beneficially owns 1,369,230 Common Units issuable upon exercise of the warrants issued to Magnolia Holdings by the Issuer, dated July 18, 2019. After the AMID Conversion, all of the outstanding warrants converted into the right to receive 1,369,230 limited liability company units of Third Coast Midstream. As a result of the AMID Conversion, all Common Units were cancelled and ceased to be outstanding and none of JP Energy, Magnolia Holdings, Magnolia and Busbar beneficially own any Common Units.

F1 · ownership.nature: Represents common units representing limited partnership interests (the "Common Units") of Third Coast Midstream, LLC (f/k/a American Midstream Partners, LP), a Delaware limited liability company (the "Issuer").

Read SEC document
May 13, 2019 Filed May 15, 2019 17:22 UTC Third Coast Midstream, LLC AMID · Entity 155869 GrantSeries C Convertible Preferred Units · Derivative 280,734 $13.98 $3,924,661.32
Disclosure

SEC source: 0001513965-19-000065 · wf-form4_155795533660415.xml · derivative · entry 3

ARCLIGHT ENERGY PARTNERS FUND V, L.P. · CIK 0001502553 · Director · 10% owner · SEE REMARKS

Magnolia Infrastructure Holdings, LLC · CIK 0001673060 · Director · 10% owner

Magnolia Infrastructure Partners, LLC · CIK 0001638285 · Director · 10% owner

American Midstream GP, LLC · CIK 0001526603 · Director · 10% owner

High Point Infrastructure Partners, LLC · CIK 0001575227 · Director · 10% owner · See Remarks

AMID GP Holdings, LLC · CIK 0001715051 · Director · 10% owner

ArcLight Capital Holdings, LLC · CIK 0001441290 · Director · 10% owner

ArcLight Capital Partners, LLC · CIK 0001502945 · Director · 10% owner

Revers Daniel R · CIK 0001405456 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · (3)

Disclosed balance after: 9,808,777

Underlying: Common Units (limited partner interests) · 281,127 shares

Expires not disclosed

F3 · derivative.exercise_price: Represents Series C Convertible Preferred Units (the "Series C Units") held by Magnolia Infrastructure Holdings, LLC ("Magnolia Holdings") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series C Units owned on the distribution record date. The Series C Units have no expiration date and are convertible in whole or part into Common Units at a conversion ratio of 1:1.0014 at any time.

F3 · derivative.exercise_date: Represents Series C Convertible Preferred Units (the "Series C Units") held by Magnolia Infrastructure Holdings, LLC ("Magnolia Holdings") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series C Units owned on the distribution record date. The Series C Units have no expiration date and are convertible in whole or part into Common Units at a conversion ratio of 1:1.0014 at any time.

F3 · derivative.expiration_date: Represents Series C Convertible Preferred Units (the "Series C Units") held by Magnolia Infrastructure Holdings, LLC ("Magnolia Holdings") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series C Units owned on the distribution record date. The Series C Units have no expiration date and are convertible in whole or part into Common Units at a conversion ratio of 1:1.0014 at any time.

Read SEC document
May 13, 2019 Filed May 15, 2019 17:22 UTC Third Coast Midstream, LLC AMID · Entity 155869 GrantSeries A-2 Convertible Preferred Units · Derivative 102,729 $13.66 $1,403,278.14
Disclosure

SEC source: 0001513965-19-000065 · wf-form4_155795533660415.xml · derivative · entry 2

ARCLIGHT ENERGY PARTNERS FUND V, L.P. · CIK 0001502553 · Director · 10% owner · SEE REMARKS

Magnolia Infrastructure Holdings, LLC · CIK 0001673060 · Director · 10% owner

Magnolia Infrastructure Partners, LLC · CIK 0001638285 · Director · 10% owner

American Midstream GP, LLC · CIK 0001526603 · Director · 10% owner

High Point Infrastructure Partners, LLC · CIK 0001575227 · Director · 10% owner · See Remarks

AMID GP Holdings, LLC · CIK 0001715051 · Director · 10% owner

ArcLight Capital Holdings, LLC · CIK 0001441290 · Director · 10% owner

ArcLight Capital Partners, LLC · CIK 0001502945 · Director · 10% owner

Revers Daniel R · CIK 0001405456 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · (2)

Disclosed balance after: 4,489,748

Underlying: Common Units (limited partner interests) · 131,606 shares

Expires not disclosed

F2 · derivative.exercise_price: Represents Series A-2 Convertible Preferred Units (the "Series A-2 Units") held by Magnolia Infrastructure Partners, LLC ("Magnolia") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-2 Units owned on the distribution record date. The Series A-2 Units have no expiration date and are convertible in whole or part into Common Units at a conversion ratio of 1:1.2811 at any time.

F2 · derivative.exercise_date: Represents Series A-2 Convertible Preferred Units (the "Series A-2 Units") held by Magnolia Infrastructure Partners, LLC ("Magnolia") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-2 Units owned on the distribution record date. The Series A-2 Units have no expiration date and are convertible in whole or part into Common Units at a conversion ratio of 1:1.2811 at any time.

F2 · derivative.expiration_date: Represents Series A-2 Convertible Preferred Units (the "Series A-2 Units") held by Magnolia Infrastructure Partners, LLC ("Magnolia") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-2 Units owned on the distribution record date. The Series A-2 Units have no expiration date and are convertible in whole or part into Common Units at a conversion ratio of 1:1.2811 at any time.

Read SEC document
May 13, 2019 Filed May 15, 2019 17:22 UTC Third Coast Midstream, LLC AMID · Entity 155869 GrantSeries A-1 Convertible Preferred Units · Derivative 239,779 $13.66 $3,275,381.14
Disclosure

SEC source: 0001513965-19-000065 · wf-form4_155795533660415.xml · derivative · entry 1

ARCLIGHT ENERGY PARTNERS FUND V, L.P. · CIK 0001502553 · Director · 10% owner · SEE REMARKS

Magnolia Infrastructure Holdings, LLC · CIK 0001673060 · Director · 10% owner

Magnolia Infrastructure Partners, LLC · CIK 0001638285 · Director · 10% owner

American Midstream GP, LLC · CIK 0001526603 · Director · 10% owner

High Point Infrastructure Partners, LLC · CIK 0001575227 · Director · 10% owner · See Remarks

AMID GP Holdings, LLC · CIK 0001715051 · Director · 10% owner

ArcLight Capital Holdings, LLC · CIK 0001441290 · Director · 10% owner

ArcLight Capital Partners, LLC · CIK 0001502945 · Director · 10% owner

Revers Daniel R · CIK 0001405456 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · (1)

Disclosed balance after: 10,479,528

Underlying: Common Units (limited partner interests) · 239,779 shares

Expires not disclosed

F1 · derivative.exercise_price: Represents Series A-1 Convertible Preferred Units (the "Series A-1 Units) held directly by American Midstream GP, LLC (the "General Partner"), the general partner of American Midstream Partners, LP (the "Issuer") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-1 Units owned on the distribution record date. The Series A-1 Units have no expiration date and are convertible in whole or in part into common units of the Issuer ("Common Units") at a conversion ratio of 1:1.2811 at any time.

F1 · derivative.exercise_date: Represents Series A-1 Convertible Preferred Units (the "Series A-1 Units) held directly by American Midstream GP, LLC (the "General Partner"), the general partner of American Midstream Partners, LP (the "Issuer") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-1 Units owned on the distribution record date. The Series A-1 Units have no expiration date and are convertible in whole or in part into common units of the Issuer ("Common Units") at a conversion ratio of 1:1.2811 at any time.

F1 · derivative.expiration_date: Represents Series A-1 Convertible Preferred Units (the "Series A-1 Units) held directly by American Midstream GP, LLC (the "General Partner"), the general partner of American Midstream Partners, LP (the "Issuer") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-1 Units owned on the distribution record date. The Series A-1 Units have no expiration date and are convertible in whole or in part into common units of the Issuer ("Common Units") at a conversion ratio of 1:1.2811 at any time.

Read SEC document
February 15, 2019 Filed Feb 19, 2019 16:14 UTC Third Coast Midstream, LLC AMID · Entity 155869 GrantSeries C Convertible Preferred Untis · Derivative 272,688 $13.98 $3,812,178.24
Disclosure

SEC source: 0000899243-19-004047 · doc4.xml · derivative · entry 3

ARCLIGHT ENERGY PARTNERS FUND V, L.P. · CIK 0001502553 · Director · 10% owner · SEE REMARKS

Magnolia Infrastructure Holdings, LLC · CIK 0001673060 · 10% owner

Magnolia Infrastructure Partners, LLC · CIK 0001638285 · 10% owner

High Point Infrastructure Partners, LLC · CIK 0001575227 · 10% owner

ArcLight Capital Holdings, LLC · CIK 0001441290 · 10% owner

ArcLight Capital Partners, LLC · CIK 0001502945 · 10% owner

Revers Daniel R · CIK 0001405456 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnote

Disclosed balance after: 9,514,330

Underlying: Common Units (limited partner interests) · 273,069 shares

Expires not disclosed

F3 · derivative.exercise_price: Represents Series C Convertible Preferred Units (the "Series C Units") held by Magnolia Infrastructure Holdings, LLC ("Magnolia Holdings") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series C Units owned on the distribution record date. The Series C Units have no expiration date and are convertible in whole or part into common units of American Midstream Partners, LP (the "Issuer") ("Common Units") at a conversion ratio of 1:1.0014 at any time.

F3 · derivative.exercise_date: Represents Series C Convertible Preferred Units (the "Series C Units") held by Magnolia Infrastructure Holdings, LLC ("Magnolia Holdings") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series C Units owned on the distribution record date. The Series C Units have no expiration date and are convertible in whole or part into common units of American Midstream Partners, LP (the "Issuer") ("Common Units") at a conversion ratio of 1:1.0014 at any time.

F3 · derivative.expiration_date: Represents Series C Convertible Preferred Units (the "Series C Units") held by Magnolia Infrastructure Holdings, LLC ("Magnolia Holdings") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series C Units owned on the distribution record date. The Series C Units have no expiration date and are convertible in whole or part into common units of American Midstream Partners, LP (the "Issuer") ("Common Units") at a conversion ratio of 1:1.0014 at any time.

F3 · ownership.nature: Represents Series C Convertible Preferred Units (the "Series C Units") held by Magnolia Infrastructure Holdings, LLC ("Magnolia Holdings") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series C Units owned on the distribution record date. The Series C Units have no expiration date and are convertible in whole or part into common units of American Midstream Partners, LP (the "Issuer") ("Common Units") at a conversion ratio of 1:1.0014 at any time.

Read SEC document
February 15, 2019 Filed Feb 19, 2019 16:14 UTC Third Coast Midstream, LLC AMID · Entity 155869 GrantSerieA-2 Convertible Preferred Units · Derivative 99,717 $13.66 $1,362,134.22
Disclosure

SEC source: 0000899243-19-004047 · doc4.xml · derivative · entry 2

ARCLIGHT ENERGY PARTNERS FUND V, L.P. · CIK 0001502553 · Director · 10% owner · SEE REMARKS

Magnolia Infrastructure Holdings, LLC · CIK 0001673060 · 10% owner

Magnolia Infrastructure Partners, LLC · CIK 0001638285 · 10% owner

High Point Infrastructure Partners, LLC · CIK 0001575227 · 10% owner

ArcLight Capital Holdings, LLC · CIK 0001441290 · 10% owner

ArcLight Capital Partners, LLC · CIK 0001502945 · 10% owner

Revers Daniel R · CIK 0001405456 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnote

Disclosed balance after: 3,401,875

Underlying: Common Units (limited partner interests) · 127,747 shares

Expires not disclosed

F2 · derivative.exercise_price: Represents Series A-2 Convertible Preferred Units (the "Series A-2 Units") held by Magnolia Infrastructure Partners, LLC ("Magnolia") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-2 Units owned on the distribution record date. The Series A-2 Units have no expiration date and are convertible in whole or in part into common units of American Midstream Partners, LP (the "Issuer") ("Common Units') at a conversion ratio of 1:1.2811 at any time.

F2 · derivative.exercise_date: Represents Series A-2 Convertible Preferred Units (the "Series A-2 Units") held by Magnolia Infrastructure Partners, LLC ("Magnolia") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-2 Units owned on the distribution record date. The Series A-2 Units have no expiration date and are convertible in whole or in part into common units of American Midstream Partners, LP (the "Issuer") ("Common Units') at a conversion ratio of 1:1.2811 at any time.

F2 · derivative.expiration_date: Represents Series A-2 Convertible Preferred Units (the "Series A-2 Units") held by Magnolia Infrastructure Partners, LLC ("Magnolia") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-2 Units owned on the distribution record date. The Series A-2 Units have no expiration date and are convertible in whole or in part into common units of American Midstream Partners, LP (the "Issuer") ("Common Units') at a conversion ratio of 1:1.2811 at any time.

F2 · ownership.nature: Represents Series A-2 Convertible Preferred Units (the "Series A-2 Units") held by Magnolia Infrastructure Partners, LLC ("Magnolia") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-2 Units owned on the distribution record date. The Series A-2 Units have no expiration date and are convertible in whole or in part into common units of American Midstream Partners, LP (the "Issuer") ("Common Units') at a conversion ratio of 1:1.2811 at any time.

Read SEC document
February 15, 2019 Filed Feb 19, 2019 16:14 UTC Third Coast Midstream, LLC AMID · Entity 155869 GrantSeries A-1 Convertible Preferred Units · Derivative 232,751 $13.66 $3,179,378.66
Disclosure

SEC source: 0000899243-19-004047 · doc4.xml · derivative · entry 1

ARCLIGHT ENERGY PARTNERS FUND V, L.P. · CIK 0001502553 · Director · 10% owner · SEE REMARKS

Magnolia Infrastructure Holdings, LLC · CIK 0001673060 · 10% owner

Magnolia Infrastructure Partners, LLC · CIK 0001638285 · 10% owner

High Point Infrastructure Partners, LLC · CIK 0001575227 · 10% owner

ArcLight Capital Holdings, LLC · CIK 0001441290 · 10% owner

ArcLight Capital Partners, LLC · CIK 0001502945 · 10% owner

Revers Daniel R · CIK 0001405456 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnote

Disclosed balance after: 7,940,322

Underlying: Common Units (limited partner interests) · 281,861 shares

Expires not disclosed

F1 · derivative.exercise_price: Represents Series A-1 Convertible Preferred Units (the "Series A-1 Units) held directly by High Point Infrastructure Partners, LLC ("HPIP") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-1 Units owned on the distribution record date. The Series A-1 Units have no expiration date and are convertible in whole or in part into common units of American Midstream Partners, LP (the "Issuer") ("Common Units") at a conversion rate of 1:1.2811 at any time.

F1 · derivative.exercise_date: Represents Series A-1 Convertible Preferred Units (the "Series A-1 Units) held directly by High Point Infrastructure Partners, LLC ("HPIP") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-1 Units owned on the distribution record date. The Series A-1 Units have no expiration date and are convertible in whole or in part into common units of American Midstream Partners, LP (the "Issuer") ("Common Units") at a conversion rate of 1:1.2811 at any time.

F1 · derivative.expiration_date: Represents Series A-1 Convertible Preferred Units (the "Series A-1 Units) held directly by High Point Infrastructure Partners, LLC ("HPIP") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-1 Units owned on the distribution record date. The Series A-1 Units have no expiration date and are convertible in whole or in part into common units of American Midstream Partners, LP (the "Issuer") ("Common Units") at a conversion rate of 1:1.2811 at any time.

F1 · ownership.nature: Represents Series A-1 Convertible Preferred Units (the "Series A-1 Units) held directly by High Point Infrastructure Partners, LLC ("HPIP") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-1 Units owned on the distribution record date. The Series A-1 Units have no expiration date and are convertible in whole or in part into common units of American Midstream Partners, LP (the "Issuer") ("Common Units") at a conversion rate of 1:1.2811 at any time.

Read SEC document
December 10, 2018 Filed Dec 11, 2018 18:28 UTC Third Coast Midstream, LLC AMID · Entity 155869 GrantCommon Units (limited partner interests) 810,517 $0.00 $0.00
Disclosure

SEC source: 0001628280-18-015021 · wf-form4_154457089559054.xml · nonDerivative · entry 1

ARCLIGHT ENERGY PARTNERS FUND V, L.P. · CIK 0001502553 · Director · 10% owner · SEE REMARKS

Magnolia Infrastructure Holdings, LLC · CIK 0001673060 · Director · 10% owner

ArcLight Capital Holdings, LLC · CIK 0001441290 · Director · 10% owner

ArcLight Capital Partners, LLC · CIK 0001502945 · Director · 10% owner

Revers Daniel R · CIK 0001405456 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnote 3

Disclosed balance after: 15,385,954

F1 · price: In December 2013, American Midstream Partners, LP (the "Issuer") acquired Blackwater Midstream Holdings, LLC ("Blackwater") from AL Blackwater, LLC ("AL Blackwater"). The Agreement and Plan of Merger by and among AL Blackwater, Blackwater, the Issuer and Blackwater Merger Sub, LLC, dated as of December 10, 2013 (the "Merger Agreement"), included a provision whereby AL Blackwater would be entitled to additional merger consideration, payable in either cash or Common Units, or a combination thereof, based on Blackwater meeting certain operating targets. Final resolution of the additional merger consideration was determined in the fourth quarter of 2018, in accordance with the Merger Agreement, and, on December 10, 2018, the Issuer issued 810,517 Common Units to Common Units to Magnolia Infrastructure Holdings, LLC ("Magnolia Holdings"), an affiliate of AL Blackwater, as part of the additional merger consideration.

F2 · balance_after: Does not include (i) 7,707,571 Series A-1 Convertible Preferred Units held directly by High Point Infrastructure Partners, LLC ("HPIP"), which have no expiration date and are convertible in whole or in part into common units of the Issuer at a conversion rate of 1:1.2811 at any time, (ii) 3,302,158 Series A-2 Convertible Preferred Units held by Magnolia Infrastructure Partners, LLC ("Magnolia"), which have no expiration date and are convertible in whole or in part into common units of the Issuer at a conversion rate of 1:1.2811 at any time and (iii) 9,241,642 Series C Convertible Preferred Units held by Magnolia Holdings, which have no expiration date and are convertible in whole or in part into common units of the Issuer at a conversion rate of 1:1.0014 at any time.

F3 · ownership.direct: The common units reflected in Column 5 include (i) 2,853,482 common units directly owned by Busbar II, LLC ("Busbar"), (ii) 10,563,942 common units directly owned by Magnolia Holdings, (iii) 618,921 common units directly owned by Magnolia, (iv) 1,349,609 common units directly owned by American Midstream GP, LLC (the "General Partner"), the general partner of the Issuer.

Read SEC document
February 14, 2018 Filed Feb 16, 2018 17:04 UTC Third Coast Midstream, LLC AMID · Entity 155869 GrantSeries C Convertible Preferred Units · Derivative 276,195 $13.39 $3,698,251.05
Disclosure

SEC source: 0001513965-18-000016 · wf-form4_151881865842671.xml · derivative · entry 3

ARCLIGHT ENERGY PARTNERS FUND V, L.P. · CIK 0001502553 · Director · 10% owner · SEE REMARKS

Magnolia Infrastructure Holdings, LLC · CIK 0001673060 · Director · 10% owner

Magnolia Infrastructure Partners, LLC · CIK 0001638285 · Director · 10% owner

High Point Infrastructure Partners, LLC · CIK 0001575227 · Director · 10% owner · See Remarks

AMID GP Holdings, LLC · CIK 0001715051 · Director · 10% owner

ArcLight Capital Holdings, LLC · CIK 0001441290 · Director · 10% owner

ArcLight Capital Partners, LLC · CIK 0001502945 · Director · 10% owner

Revers Daniel R · CIK 0001405456 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · (3)

Disclosed balance after: 9,241,642

Underlying: Common Units (limited partner interests) · 288,789 shares

Expires not disclosed

F3 · derivative.exercise_price: Represents Series C Convertible Preferred Units (the "Series C Units") held by Magnolia Infrastructure Holdings, LLC ("Magnolia Holdings") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series C Units owned on the distribution record date. The Series C Units have no expiration date and are convertible in whole or part into common units of American Midstream Partners, LP (the "Issuer") ("Common Units") at a conversion ratio of 1:1.0456 at any time.

F3 · derivative.exercise_date: Represents Series C Convertible Preferred Units (the "Series C Units") held by Magnolia Infrastructure Holdings, LLC ("Magnolia Holdings") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series C Units owned on the distribution record date. The Series C Units have no expiration date and are convertible in whole or part into common units of American Midstream Partners, LP (the "Issuer") ("Common Units") at a conversion ratio of 1:1.0456 at any time.

F3 · derivative.expiration_date: Represents Series C Convertible Preferred Units (the "Series C Units") held by Magnolia Infrastructure Holdings, LLC ("Magnolia Holdings") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series C Units owned on the distribution record date. The Series C Units have no expiration date and are convertible in whole or part into common units of American Midstream Partners, LP (the "Issuer") ("Common Units") at a conversion ratio of 1:1.0456 at any time.

Read SEC document
February 14, 2018 Filed Feb 16, 2018 17:04 UTC Third Coast Midstream, LLC AMID · Entity 155869 GrantSeries A-2 Convertible Preferred Units · Derivative 87,079 $15.23 $1,326,213.17
Disclosure

SEC source: 0001513965-18-000016 · wf-form4_151881865842671.xml · derivative · entry 2

ARCLIGHT ENERGY PARTNERS FUND V, L.P. · CIK 0001502553 · Director · 10% owner · SEE REMARKS

Magnolia Infrastructure Holdings, LLC · CIK 0001673060 · Director · 10% owner

Magnolia Infrastructure Partners, LLC · CIK 0001638285 · Director · 10% owner

High Point Infrastructure Partners, LLC · CIK 0001575227 · Director · 10% owner · See Remarks

AMID GP Holdings, LLC · CIK 0001715051 · Director · 10% owner

ArcLight Capital Holdings, LLC · CIK 0001441290 · Director · 10% owner

ArcLight Capital Partners, LLC · CIK 0001502945 · Director · 10% owner

Revers Daniel R · CIK 0001405456 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · (2)

Disclosed balance after: 3,302,158

Underlying: Common Units (limited partner interests) · 100,054 shares

Expires not disclosed

F2 · derivative.exercise_price: Represents Series A-2 Convertible Preferred Units (the "Series A-2 Units") held by Magnolia Infrastructure Partners, LLC ("Magnolia") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-2 Units owned on the distribution record date. The Series A-2 Units have no expiration date and are convertible in whole or in part into common units of American Midstream Partners, LP (the "Issuer") ("Common Units') at a conversion ratio of 1:1.1490 at any time.

F2 · derivative.exercise_date: Represents Series A-2 Convertible Preferred Units (the "Series A-2 Units") held by Magnolia Infrastructure Partners, LLC ("Magnolia") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-2 Units owned on the distribution record date. The Series A-2 Units have no expiration date and are convertible in whole or in part into common units of American Midstream Partners, LP (the "Issuer") ("Common Units') at a conversion ratio of 1:1.1490 at any time.

F2 · derivative.expiration_date: Represents Series A-2 Convertible Preferred Units (the "Series A-2 Units") held by Magnolia Infrastructure Partners, LLC ("Magnolia") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-2 Units owned on the distribution record date. The Series A-2 Units have no expiration date and are convertible in whole or in part into common units of American Midstream Partners, LP (the "Issuer") ("Common Units') at a conversion ratio of 1:1.1490 at any time.

Read SEC document
February 14, 2018 Filed Feb 16, 2018 17:04 UTC Third Coast Midstream, LLC AMID · Entity 155869 GrantSeries A-1 Convertible Preferred Units · Derivative 203,252 $15.23 $3,095,527.96
Disclosure

SEC source: 0001513965-18-000016 · wf-form4_151881865842671.xml · derivative · entry 1

ARCLIGHT ENERGY PARTNERS FUND V, L.P. · CIK 0001502553 · Director · 10% owner · SEE REMARKS

Magnolia Infrastructure Holdings, LLC · CIK 0001673060 · Director · 10% owner

Magnolia Infrastructure Partners, LLC · CIK 0001638285 · Director · 10% owner

High Point Infrastructure Partners, LLC · CIK 0001575227 · Director · 10% owner · See Remarks

AMID GP Holdings, LLC · CIK 0001715051 · Director · 10% owner

ArcLight Capital Holdings, LLC · CIK 0001441290 · Director · 10% owner

ArcLight Capital Partners, LLC · CIK 0001502945 · Director · 10% owner

Revers Daniel R · CIK 0001405456 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · (1)

Disclosed balance after: 7,707,571

Underlying: Common Units (limited partner interests) · 233,537 shares

Expires not disclosed

F1 · derivative.exercise_price: Represents Series A-1 Convertible Preferred Units (the "Series A-1 Units) held directly by High Point Infrastructure Partners, LLC ("HPIP") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-1 Units owned on the distribution record date. The Series A-1 Units have no expiration date and are convertible in whole or in part into common units of American Midstream Partners, LP (the "Issuer") ("Common Units") at a conversion rate of 1:1.1490 at any time.

F1 · derivative.exercise_date: Represents Series A-1 Convertible Preferred Units (the "Series A-1 Units) held directly by High Point Infrastructure Partners, LLC ("HPIP") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-1 Units owned on the distribution record date. The Series A-1 Units have no expiration date and are convertible in whole or in part into common units of American Midstream Partners, LP (the "Issuer") ("Common Units") at a conversion rate of 1:1.1490 at any time.

F1 · derivative.expiration_date: Represents Series A-1 Convertible Preferred Units (the "Series A-1 Units) held directly by High Point Infrastructure Partners, LLC ("HPIP") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-1 Units owned on the distribution record date. The Series A-1 Units have no expiration date and are convertible in whole or in part into common units of American Midstream Partners, LP (the "Issuer") ("Common Units") at a conversion rate of 1:1.1490 at any time.

Read SEC document
November 14, 2017 Filed Nov 16, 2017 17:53 UTC Third Coast Midstream, LLC AMID · Entity 155869 GrantSeries C Convertible Preferred Units · Derivative 173,242 $13.40 $2,321,442.80
Disclosure

SEC source: 0001513965-17-000145 · wf-form4_151087281863774.xml · derivative · entry 3

ARCLIGHT ENERGY PARTNERS FUND V, L.P. · CIK 0001502553 · Director · 10% owner · SEE REMARKS

Magnolia Infrastructure Holdings, LLC · CIK 0001673060 · Director · 10% owner

Magnolia Infrastructure Partners, LLC · CIK 0001638285 · Director · 10% owner

High Point Infrastructure Partners, LLC · CIK 0001575227 · Director · 10% owner · See Remarks

AMID GP Holdings, LLC · CIK 0001715051 · Director · 10% owner

ArcLight Capital Holdings, LLC · CIK 0001441290 · Director · 10% owner

ArcLight Capital Partners, LLC · CIK 0001502945 · Director · 10% owner

Revers Daniel R · CIK 0001405456 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · (3)

Disclosed balance after: 8,965,447

Underlying: Common Units (limited partner interests) · 181,003 shares

Expires not disclosed

F3 · derivative.exercise_price: Represents Series C Convertible Preferred Units (the "Series C Units") held by Magnolia Infrastructure Holdings, LLC ("Magnolia Holdings") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series C Units owned on the distribution record dated. The Series C Units have no expiration date and are convertible in whole or part into Common Units at a conversion ratio of 1:1.0448 at any time.

F3 · kind: Represents Series C Convertible Preferred Units (the "Series C Units") held by Magnolia Infrastructure Holdings, LLC ("Magnolia Holdings") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series C Units owned on the distribution record dated. The Series C Units have no expiration date and are convertible in whole or part into Common Units at a conversion ratio of 1:1.0448 at any time.

F3 · derivative.exercise_date: Represents Series C Convertible Preferred Units (the "Series C Units") held by Magnolia Infrastructure Holdings, LLC ("Magnolia Holdings") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series C Units owned on the distribution record dated. The Series C Units have no expiration date and are convertible in whole or part into Common Units at a conversion ratio of 1:1.0448 at any time.

F3 · derivative.expiration_date: Represents Series C Convertible Preferred Units (the "Series C Units") held by Magnolia Infrastructure Holdings, LLC ("Magnolia Holdings") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series C Units owned on the distribution record dated. The Series C Units have no expiration date and are convertible in whole or part into Common Units at a conversion ratio of 1:1.0448 at any time.

Read SEC document
November 14, 2017 Filed Nov 16, 2017 17:53 UTC Third Coast Midstream, LLC AMID · Entity 155869 GrantSeries A-2 Convertible Preferred Units · Derivative 54,732 $15.24 $834,115.68
Disclosure

SEC source: 0001513965-17-000145 · wf-form4_151087281863774.xml · derivative · entry 2

ARCLIGHT ENERGY PARTNERS FUND V, L.P. · CIK 0001502553 · Director · 10% owner · SEE REMARKS

Magnolia Infrastructure Holdings, LLC · CIK 0001673060 · Director · 10% owner

Magnolia Infrastructure Partners, LLC · CIK 0001638285 · Director · 10% owner

High Point Infrastructure Partners, LLC · CIK 0001575227 · Director · 10% owner · See Remarks

AMID GP Holdings, LLC · CIK 0001715051 · Director · 10% owner

ArcLight Capital Holdings, LLC · CIK 0001441290 · Director · 10% owner

ArcLight Capital Partners, LLC · CIK 0001502945 · Director · 10% owner

Revers Daniel R · CIK 0001405456 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · (2)

Disclosed balance after: 3,215,079

Underlying: Common Units (limited partner interests) · 62,849 shares

Expires not disclosed

F2 · derivative.exercise_price: Represents Series A-2 Convertible Preferred Units (the "Series A-2 Units") held by Magnolia Infrastructure Partners, LLC ("Magnolia") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-2 Units owned on the distribution record date. The Series A-2 Units have no expiration date and are convertible into Common Units at a conversion ratio of 1:1.1483 at any time.

F2 · kind: Represents Series A-2 Convertible Preferred Units (the "Series A-2 Units") held by Magnolia Infrastructure Partners, LLC ("Magnolia") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-2 Units owned on the distribution record date. The Series A-2 Units have no expiration date and are convertible into Common Units at a conversion ratio of 1:1.1483 at any time.

F2 · derivative.exercise_date: Represents Series A-2 Convertible Preferred Units (the "Series A-2 Units") held by Magnolia Infrastructure Partners, LLC ("Magnolia") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-2 Units owned on the distribution record date. The Series A-2 Units have no expiration date and are convertible into Common Units at a conversion ratio of 1:1.1483 at any time.

F2 · derivative.expiration_date: Represents Series A-2 Convertible Preferred Units (the "Series A-2 Units") held by Magnolia Infrastructure Partners, LLC ("Magnolia") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-2 Units owned on the distribution record date. The Series A-2 Units have no expiration date and are convertible into Common Units at a conversion ratio of 1:1.1483 at any time.

Read SEC document
November 14, 2017 Filed Nov 16, 2017 17:53 UTC Third Coast Midstream, LLC AMID · Entity 155869 GrantSeries A-1 Convertible Preferred Units · Derivative 127,751 $15.24 $1,946,925.24
Disclosure

SEC source: 0001513965-17-000145 · wf-form4_151087281863774.xml · derivative · entry 1

ARCLIGHT ENERGY PARTNERS FUND V, L.P. · CIK 0001502553 · Director · 10% owner · SEE REMARKS

Magnolia Infrastructure Holdings, LLC · CIK 0001673060 · Director · 10% owner

Magnolia Infrastructure Partners, LLC · CIK 0001638285 · Director · 10% owner

High Point Infrastructure Partners, LLC · CIK 0001575227 · Director · 10% owner · See Remarks

AMID GP Holdings, LLC · CIK 0001715051 · Director · 10% owner

ArcLight Capital Holdings, LLC · CIK 0001441290 · Director · 10% owner

ArcLight Capital Partners, LLC · CIK 0001502945 · Director · 10% owner

Revers Daniel R · CIK 0001405456 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · (1)

Disclosed balance after: 7,504,319

Underlying: Common Units (limited partner interests) · 146,696 shares

Expires not disclosed

F1 · derivative.exercise_price: Represents Series A-1 Convertible Preferred Units (the "Series A-1 Units) held directly by High Point Infrastructure Partners, LLC ("HPIP") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-1 Units owned on the distribution record date. The Series A-1 Units have no expiration date and are convertible in whole or in part into common units of American Midstream Partners, LP (the "Issuer") ("Common Units") at a conversion ratio of 1:1.1483 at any time.

F1 · kind: Represents Series A-1 Convertible Preferred Units (the "Series A-1 Units) held directly by High Point Infrastructure Partners, LLC ("HPIP") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-1 Units owned on the distribution record date. The Series A-1 Units have no expiration date and are convertible in whole or in part into common units of American Midstream Partners, LP (the "Issuer") ("Common Units") at a conversion ratio of 1:1.1483 at any time.

F1 · derivative.exercise_date: Represents Series A-1 Convertible Preferred Units (the "Series A-1 Units) held directly by High Point Infrastructure Partners, LLC ("HPIP") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-1 Units owned on the distribution record date. The Series A-1 Units have no expiration date and are convertible in whole or in part into common units of American Midstream Partners, LP (the "Issuer") ("Common Units") at a conversion ratio of 1:1.1483 at any time.

F1 · derivative.expiration_date: Represents Series A-1 Convertible Preferred Units (the "Series A-1 Units) held directly by High Point Infrastructure Partners, LLC ("HPIP") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-1 Units owned on the distribution record date. The Series A-1 Units have no expiration date and are convertible in whole or in part into common units of American Midstream Partners, LP (the "Issuer") ("Common Units") at a conversion ratio of 1:1.1483 at any time.

Read SEC document
October 02, 2017 Filed Oct 4, 2017 19:08 UTC Third Coast Midstream, LLC AMID · Entity 155869 Disposition to issuerSeries D Convertible Preferred Units · Derivative 2,333,333 $0.00 $0.00
Disclosure

SEC source: 0001513965-17-000127 · wf-form4_150715847774986.xml · derivative · entry 1

ARCLIGHT ENERGY PARTNERS FUND V, L.P. · CIK 0001502553 · Director · 10% owner · SEE REMARKS

Magnolia Infrastructure Holdings, LLC · CIK 0001673060 · Director · 10% owner

ArcLight Capital Holdings, LLC · CIK 0001441290 · Director · 10% owner

ArcLight Capital Partners, LLC · CIK 0001502945 · Director · 10% owner

Revers Daniel R · CIK 0001405456 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 0

Underlying: Common Units (limited partner interests) · 2,333,333 shares

Expires not disclosed

F1 · derivative.exercise_price: Pursuant to the Agreement of Limited Partnership of the Issuer (as amended, the "Partnership Agreement"), the Issuer exercised its call right to repurchase all of the 2,333,333 outstanding Series D Convertible Preferred Units (the "Series D Units") from Magnolia Infrastructure Holdings, LLC ("Magnolia Holdings). On October 2, 2017, the Issuer purchased the Series D Units from Magnolia Holdings in a transaction in accordance with the Partnership Agreement and Rule 16b-3. As a result, none remain outstanding.

F1 · derivative.exercise_date: Pursuant to the Agreement of Limited Partnership of the Issuer (as amended, the "Partnership Agreement"), the Issuer exercised its call right to repurchase all of the 2,333,333 outstanding Series D Convertible Preferred Units (the "Series D Units") from Magnolia Infrastructure Holdings, LLC ("Magnolia Holdings). On October 2, 2017, the Issuer purchased the Series D Units from Magnolia Holdings in a transaction in accordance with the Partnership Agreement and Rule 16b-3. As a result, none remain outstanding.

F1 · derivative.expiration_date: Pursuant to the Agreement of Limited Partnership of the Issuer (as amended, the "Partnership Agreement"), the Issuer exercised its call right to repurchase all of the 2,333,333 outstanding Series D Convertible Preferred Units (the "Series D Units") from Magnolia Infrastructure Holdings, LLC ("Magnolia Holdings). On October 2, 2017, the Issuer purchased the Series D Units from Magnolia Holdings in a transaction in accordance with the Partnership Agreement and Rule 16b-3. As a result, none remain outstanding.

F2 · ownership.nature: Held directly by Magnolia Holdings.

Read SEC document
August 14, 2017 Filed Aug 16, 2017 21:59 UTC Third Coast Midstream, LLC AMID · Entity 155869 OtherSeries A-2 Convertible Preferred Units · Derivative 41,001 $15.69 $643,305.69
Disclosure

SEC source: 0001513965-17-000117 · wf-form4_150293517189864.xml · derivative · entry 2

ARCLIGHT ENERGY PARTNERS FUND V, L.P. · CIK 0001502553 · Director · 10% owner · SEE REMARKS

Magnolia Infrastructure Holdings, LLC · CIK 0001673060 · Director · 10% owner

Magnolia Infrastructure Partners, LLC · CIK 0001638285 · Director · 10% owner

High Point Infrastructure Partners, LLC · CIK 0001575227 · Director · 10% owner · See Remarks

American Midstream GP, LLC · CIK 0001526603 · Director · 10% owner

ArcLight Capital Holdings, LLC · CIK 0001441290 · Director · 10% owner

ArcLight Capital Partners, LLC · CIK 0001502945 · Director · 10% owner

Revers Daniel R · CIK 0001405456 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · (3)

Disclosed balance after: 3,160,347

Underlying: Common Units (limited partner interests) · 45,733 shares

Expires not disclosed

F3 · derivative.exercise_price: Represents Series A-2 Convertible Preferred Units (the "Series A-2 Units") held by Magnolia Infrastructure Partners, LLC ("Magnolia") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-2 Units owned on the distribution record date. The Series A-2 Units have no expiration date and are convertible into Common Units at a conversion ratio of 1:1.1154 at any time.

F3 · kind: Represents Series A-2 Convertible Preferred Units (the "Series A-2 Units") held by Magnolia Infrastructure Partners, LLC ("Magnolia") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-2 Units owned on the distribution record date. The Series A-2 Units have no expiration date and are convertible into Common Units at a conversion ratio of 1:1.1154 at any time.

F3 · derivative.exercise_date: Represents Series A-2 Convertible Preferred Units (the "Series A-2 Units") held by Magnolia Infrastructure Partners, LLC ("Magnolia") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-2 Units owned on the distribution record date. The Series A-2 Units have no expiration date and are convertible into Common Units at a conversion ratio of 1:1.1154 at any time.

F3 · derivative.expiration_date: Represents Series A-2 Convertible Preferred Units (the "Series A-2 Units") held by Magnolia Infrastructure Partners, LLC ("Magnolia") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-2 Units owned on the distribution record date. The Series A-2 Units have no expiration date and are convertible into Common Units at a conversion ratio of 1:1.1154 at any time.

F4 · balance_after: Represents the aggregate number of Series A-2 Units held after the acquisition of Series A-2 Units reported in Column 5 of this line item.

Read SEC document
August 14, 2017 Filed Aug 16, 2017 21:59 UTC Third Coast Midstream, LLC AMID · Entity 155869 OtherSeries A-1 Convertible Preferred Units · Derivative 95,701 $15.69 $1,501,548.69
Disclosure

SEC source: 0001513965-17-000117 · wf-form4_150293517189864.xml · derivative · entry 1

ARCLIGHT ENERGY PARTNERS FUND V, L.P. · CIK 0001502553 · Director · 10% owner · SEE REMARKS

Magnolia Infrastructure Holdings, LLC · CIK 0001673060 · Director · 10% owner

Magnolia Infrastructure Partners, LLC · CIK 0001638285 · Director · 10% owner

High Point Infrastructure Partners, LLC · CIK 0001575227 · Director · 10% owner · See Remarks

American Midstream GP, LLC · CIK 0001526603 · Director · 10% owner

ArcLight Capital Holdings, LLC · CIK 0001441290 · Director · 10% owner

ArcLight Capital Partners, LLC · CIK 0001502945 · Director · 10% owner

Revers Daniel R · CIK 0001405456 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · (1)

Disclosed balance after: 7,376,568

Underlying: Common Units (limited partner interests) · 106,745 shares

Expires not disclosed

F1 · derivative.exercise_price: Represents Series A-1 Convertible Preferred Units (the "Series A-1 Units") held directly by High Point Infrastructure Partners, LLC ("HPIP") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-1 Units owned on the distribution record date. The Series A-1 Units have no expiration date and are convertible in whole or in part into common units of American Midstream Partners, LP (the "Issuer") ("Common Units") at a conversion ratio of 1:1.1154 at any time.

F1 · kind: Represents Series A-1 Convertible Preferred Units (the "Series A-1 Units") held directly by High Point Infrastructure Partners, LLC ("HPIP") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-1 Units owned on the distribution record date. The Series A-1 Units have no expiration date and are convertible in whole or in part into common units of American Midstream Partners, LP (the "Issuer") ("Common Units") at a conversion ratio of 1:1.1154 at any time.

F1 · derivative.exercise_date: Represents Series A-1 Convertible Preferred Units (the "Series A-1 Units") held directly by High Point Infrastructure Partners, LLC ("HPIP") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-1 Units owned on the distribution record date. The Series A-1 Units have no expiration date and are convertible in whole or in part into common units of American Midstream Partners, LP (the "Issuer") ("Common Units") at a conversion ratio of 1:1.1154 at any time.

F1 · derivative.expiration_date: Represents Series A-1 Convertible Preferred Units (the "Series A-1 Units") held directly by High Point Infrastructure Partners, LLC ("HPIP") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-1 Units owned on the distribution record date. The Series A-1 Units have no expiration date and are convertible in whole or in part into common units of American Midstream Partners, LP (the "Issuer") ("Common Units") at a conversion ratio of 1:1.1154 at any time.

F2 · balance_after: Represents the aggregate number of Series A-1 Units held after the acquisition of Series A-1 Units reported in Column 5 of this line item.

Read SEC document
August 14, 2017 Filed Aug 22, 2017 16:21 UTC Amendment Third Coast Midstream, LLC AMID · Entity 155869 OtherSeries A-2 Convertible Preferred Units · Derivative 41,001 $15.69 $643,305.69
Disclosure

SEC source: 0001513965-17-000119 · wf-form4a_150343329349954.xml · derivative · entry 2

ARCLIGHT ENERGY PARTNERS FUND V, L.P. · CIK 0001502553 · Director · 10% owner · SEE REMARKS

Magnolia Infrastructure Holdings, LLC · CIK 0001673060 · Director · 10% owner

Magnolia Infrastructure Partners, LLC · CIK 0001638285 · Director · 10% owner

High Point Infrastructure Partners, LLC · CIK 0001575227 · Director · 10% owner · See Remarks

AMID GP Holdings, LLC · CIK 0001715051 · Director · 10% owner

American Midstream GP, LLC · CIK 0001526603 · Director · 10% owner

ArcLight Capital Holdings, LLC · CIK 0001441290 · Director · 10% owner

ArcLight Capital Partners, LLC · CIK 0001502945 · Director · 10% owner

Revers Daniel R · CIK 0001405456 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · (3)

Disclosed balance after: 3,160,347

Underlying: Common Units (limited partner interests) · 45,733 shares

Expires not disclosed

F3 · derivative.exercise_price: Represents Series A-2 Convertible Preferred Units (the "Series A-2 Units") held by Magnolia Infrastructure Partners, LLC ("Magnolia") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-2 Units owned on the distribution record date. The Series A-2 Units have no expiration date and are convertible into Common Units at a conversion ratio of 1:1.1154 at any time.

F3 · kind: Represents Series A-2 Convertible Preferred Units (the "Series A-2 Units") held by Magnolia Infrastructure Partners, LLC ("Magnolia") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-2 Units owned on the distribution record date. The Series A-2 Units have no expiration date and are convertible into Common Units at a conversion ratio of 1:1.1154 at any time.

F3 · derivative.exercise_date: Represents Series A-2 Convertible Preferred Units (the "Series A-2 Units") held by Magnolia Infrastructure Partners, LLC ("Magnolia") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-2 Units owned on the distribution record date. The Series A-2 Units have no expiration date and are convertible into Common Units at a conversion ratio of 1:1.1154 at any time.

F3 · derivative.expiration_date: Represents Series A-2 Convertible Preferred Units (the "Series A-2 Units") held by Magnolia Infrastructure Partners, LLC ("Magnolia") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-2 Units owned on the distribution record date. The Series A-2 Units have no expiration date and are convertible into Common Units at a conversion ratio of 1:1.1154 at any time.

F4 · balance_after: Represents the aggregate number of Series A-2 Units held after the acquisition of Series A-2 Units reported in Column 5 of this line item.

Read SEC document
August 14, 2017 Filed Aug 22, 2017 16:21 UTC Amendment Third Coast Midstream, LLC AMID · Entity 155869 OtherSeries A-1 Convertible Preferred Units · Derivative 95,701 $15.69 $1,501,548.69
Disclosure

SEC source: 0001513965-17-000119 · wf-form4a_150343329349954.xml · derivative · entry 1

ARCLIGHT ENERGY PARTNERS FUND V, L.P. · CIK 0001502553 · Director · 10% owner · SEE REMARKS

Magnolia Infrastructure Holdings, LLC · CIK 0001673060 · Director · 10% owner

Magnolia Infrastructure Partners, LLC · CIK 0001638285 · Director · 10% owner

High Point Infrastructure Partners, LLC · CIK 0001575227 · Director · 10% owner · See Remarks

AMID GP Holdings, LLC · CIK 0001715051 · Director · 10% owner

American Midstream GP, LLC · CIK 0001526603 · Director · 10% owner

ArcLight Capital Holdings, LLC · CIK 0001441290 · Director · 10% owner

ArcLight Capital Partners, LLC · CIK 0001502945 · Director · 10% owner

Revers Daniel R · CIK 0001405456 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · (1)

Disclosed balance after: 7,376,568

Underlying: Common Units (limited partner interests) · 106,745 shares

Expires not disclosed

F1 · derivative.exercise_price: Represents Series A-1 Convertible Preferred Units (the "Series A-1 Units") held directly by High Point Infrastructure Partners, LLC ("HPIP") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-1 Units owned on the distribution record date. The Series A-1 Units have no expiration date and are convertible in whole or in part into common units of American Midstream Partners, LP (the "Issuer") ("Common Units") at a conversion ratio of 1:1.1154 at any time.

F1 · kind: Represents Series A-1 Convertible Preferred Units (the "Series A-1 Units") held directly by High Point Infrastructure Partners, LLC ("HPIP") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-1 Units owned on the distribution record date. The Series A-1 Units have no expiration date and are convertible in whole or in part into common units of American Midstream Partners, LP (the "Issuer") ("Common Units") at a conversion ratio of 1:1.1154 at any time.

F1 · derivative.exercise_date: Represents Series A-1 Convertible Preferred Units (the "Series A-1 Units") held directly by High Point Infrastructure Partners, LLC ("HPIP") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-1 Units owned on the distribution record date. The Series A-1 Units have no expiration date and are convertible in whole or in part into common units of American Midstream Partners, LP (the "Issuer") ("Common Units") at a conversion ratio of 1:1.1154 at any time.

F1 · derivative.expiration_date: Represents Series A-1 Convertible Preferred Units (the "Series A-1 Units") held directly by High Point Infrastructure Partners, LLC ("HPIP") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-1 Units owned on the distribution record date. The Series A-1 Units have no expiration date and are convertible in whole or in part into common units of American Midstream Partners, LP (the "Issuer") ("Common Units") at a conversion ratio of 1:1.1154 at any time.

F2 · balance_after: Represents the aggregate number of Series A-1 Units held after the acquisition of Series A-1 Units reported in Column 5 of this line item.

Read SEC document
May 12, 2017 Filed May 16, 2017 20:52 UTC Third Coast Midstream, LLC AMID · Entity 155869 OtherSeries A-2 Convertible Preferred Units · Derivative 40,062 $15.70 $628,973.40
Disclosure

SEC source: 0000899243-17-013430 · doc4.xml · derivative · entry 2

ARCLIGHT ENERGY PARTNERS FUND V, L.P. · CIK 0001502553 · Director · 10% owner · SEE REMARKS

Magnolia Infrastructure Holdings, LLC · CIK 0001673060 · Director · 10% owner

Magnolia Infrastructure Partners, LLC · CIK 0001638285 · Director · 10% owner

High Point Infrastructure Partners, LLC · CIK 0001575227 · Director · 10% owner

ArcLight Capital Holdings, LLC · CIK 0001441290 · Director · 10% owner

ArcLight Capital Partners, LLC · CIK 0001502945 · Director · 10% owner

Revers Daniel R · CIK 0001405456 · Director · 10% owner

American Midstream GP, LLC · CIK 0001526603 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnote

Disclosed balance after: 3,119,346

Underlying: Common Units · 44,653 shares

Expires not disclosed

F3 · derivative.exercise_price: Represents Series A-2 Convertible Preferred Units (the "Series A-2 Units") held by Magnolia Infrastructure Partners, LLC ("Magnolia") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-2 Units owned on the distribution record date. The Series A-2 Units have no expiration date and are convertible into Common Units at a conversion ratio of 1:1146 at any time.

F3 · kind: Represents Series A-2 Convertible Preferred Units (the "Series A-2 Units") held by Magnolia Infrastructure Partners, LLC ("Magnolia") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-2 Units owned on the distribution record date. The Series A-2 Units have no expiration date and are convertible into Common Units at a conversion ratio of 1:1146 at any time.

F3 · derivative.exercise_date: Represents Series A-2 Convertible Preferred Units (the "Series A-2 Units") held by Magnolia Infrastructure Partners, LLC ("Magnolia") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-2 Units owned on the distribution record date. The Series A-2 Units have no expiration date and are convertible into Common Units at a conversion ratio of 1:1146 at any time.

F3 · derivative.expiration_date: Represents Series A-2 Convertible Preferred Units (the "Series A-2 Units") held by Magnolia Infrastructure Partners, LLC ("Magnolia") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-2 Units owned on the distribution record date. The Series A-2 Units have no expiration date and are convertible into Common Units at a conversion ratio of 1:1146 at any time.

F4 · balance_after: Represents the aggregate number of Series A-2 Units held after the acquisition of Series A-2 Units reported in Column 5 of this line item.

F3 · ownership.nature: Represents Series A-2 Convertible Preferred Units (the "Series A-2 Units") held by Magnolia Infrastructure Partners, LLC ("Magnolia") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-2 Units owned on the distribution record date. The Series A-2 Units have no expiration date and are convertible into Common Units at a conversion ratio of 1:1146 at any time.

Read SEC document
May 12, 2017 Filed May 16, 2017 20:52 UTC Third Coast Midstream, LLC AMID · Entity 155869 OtherSeries A-1 Convertible Preferred Units · Derivative 93,509 $15.70 $1,468,091.30
Disclosure

SEC source: 0000899243-17-013430 · doc4.xml · derivative · entry 1

ARCLIGHT ENERGY PARTNERS FUND V, L.P. · CIK 0001502553 · Director · 10% owner · SEE REMARKS

Magnolia Infrastructure Holdings, LLC · CIK 0001673060 · Director · 10% owner

Magnolia Infrastructure Partners, LLC · CIK 0001638285 · Director · 10% owner

High Point Infrastructure Partners, LLC · CIK 0001575227 · Director · 10% owner

ArcLight Capital Holdings, LLC · CIK 0001441290 · Director · 10% owner

ArcLight Capital Partners, LLC · CIK 0001502945 · Director · 10% owner

Revers Daniel R · CIK 0001405456 · Director · 10% owner

American Midstream GP, LLC · CIK 0001526603 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnote

Disclosed balance after: 7,280,867

Underlying: Common Units · 104,225 shares

Expires not disclosed

F1 · derivative.exercise_price: Represents Series A-1 Convertible Preferred Units (the "Series A-1 Units") held directly by High Point Infrastructure Partners, LLC ("HPIP") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-1 Units owned on the distribution record date. The Series A-1 Units have no expiration date and are convertible in whole or in part into common units of the Issuer ("Common Units") at a conversion ratio of 1:1146 at any time.

F1 · kind: Represents Series A-1 Convertible Preferred Units (the "Series A-1 Units") held directly by High Point Infrastructure Partners, LLC ("HPIP") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-1 Units owned on the distribution record date. The Series A-1 Units have no expiration date and are convertible in whole or in part into common units of the Issuer ("Common Units") at a conversion ratio of 1:1146 at any time.

F1 · derivative.exercise_date: Represents Series A-1 Convertible Preferred Units (the "Series A-1 Units") held directly by High Point Infrastructure Partners, LLC ("HPIP") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-1 Units owned on the distribution record date. The Series A-1 Units have no expiration date and are convertible in whole or in part into common units of the Issuer ("Common Units") at a conversion ratio of 1:1146 at any time.

F1 · derivative.expiration_date: Represents Series A-1 Convertible Preferred Units (the "Series A-1 Units") held directly by High Point Infrastructure Partners, LLC ("HPIP") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-1 Units owned on the distribution record date. The Series A-1 Units have no expiration date and are convertible in whole or in part into common units of the Issuer ("Common Units") at a conversion ratio of 1:1146 at any time.

F2 · balance_after: Represents the aggregate number of Series A-1 Units held after the acquisition of Series A-1 Units reported in Column 5 of this line item.

F1 · ownership.nature: Represents Series A-1 Convertible Preferred Units (the "Series A-1 Units") held directly by High Point Infrastructure Partners, LLC ("HPIP") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-1 Units owned on the distribution record date. The Series A-1 Units have no expiration date and are convertible in whole or in part into common units of the Issuer ("Common Units") at a conversion ratio of 1:1146 at any time.

Read SEC document
March 08, 2017 Filed Mar 9, 2017 17:10 UTC JP Energy Partners LP JPEP · Entity 176962 Disposition to issuerSUBORDINATED UNITS (LIMITED PARTNER INTERESTS) · Derivative 14,992,654 Not disclosed Not disclosed
Disclosure

SEC source: 0001179110-17-004332 · edgar.xml · derivative · entry 2

Magnolia Infrastructure Holdings, LLC · CIK 0001673060 · Director · 10% owner · See Footnotes 2 and 3

ArcLight Capital Partners, LLC · CIK 0001502945 · 10% owner

ArcLight Capital Holdings, LLC · CIK 0001441290 · 10% owner

ARCLIGHT ENERGY PARTNERS FUND V, L.P. · CIK 0001502553 · 10% owner

Revers Daniel R · CIK 0001405456 · Director

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Units · 14,992,654 shares

Expires not disclosed

F4 · derivative.exercise_price: Each subordinated unit is the economic equivalent of one common unit. Each subordinated unit outstanding held by the reporting person was converted into the right to receive 0.5225 AMID common units at the effective time of the Merger.

F4 · kind: Each subordinated unit is the economic equivalent of one common unit. Each subordinated unit outstanding held by the reporting person was converted into the right to receive 0.5225 AMID common units at the effective time of the Merger.

F4 · price: Each subordinated unit is the economic equivalent of one common unit. Each subordinated unit outstanding held by the reporting person was converted into the right to receive 0.5225 AMID common units at the effective time of the Merger.

F4 · derivative.exercise_date: Each subordinated unit is the economic equivalent of one common unit. Each subordinated unit outstanding held by the reporting person was converted into the right to receive 0.5225 AMID common units at the effective time of the Merger.

F4 · derivative.expiration_date: Each subordinated unit is the economic equivalent of one common unit. Each subordinated unit outstanding held by the reporting person was converted into the right to receive 0.5225 AMID common units at the effective time of the Merger.

F2 · ownership.direct: This Form 4 is filed jointly by Magnolia Infrastructure Holdings, LLC ("Magnolia", as successor by merger to AL Lonestar, LLC, as successor by merger to Lonestar Midstream Holdings, LLC), ArcLight Capital Partners, LLC ("ArcLight Partners"), ArcLight Capital Holdings, LLC ("ArcLight Holdings"), ArcLight Energy Partners Fund V, L.P. ("ArcLight Fund V" and together with ArcLight Partners and ArcLight Holdings, the "ArcLight Entities") and Daniel R. Revers. Prior to the closing of the Merger, Magnolia owned 100% of the interests in JP Energy GP II LLC, the issuer's general partner (the "General Partner"), and was deemed to indirectly beneficially own the securities held by the General Partner, but disclaimed beneficial ownership except to the extent of its pecuniary interest therein. (Continued in Footnote 3)

F3 · ownership.direct: (Continued from Footnote 2) The General Partner holds a non-economic general partner interest in the issuer. Prior to the closing of the Merger, ArcLight Fund V owned and controlled, through one of its wholly owned subsidiaries, Magnolia, and therefore may have been deemed to indirectly beneficially own the securities held directly and indirectly by Magnolia. Mr. Revers is a director of the General Partner and is managing partner of ArcLight Partners. ArcLight Partners is the investment manager of, and ArcLight Holdings is the managing partner of the general partner of, ArcLight Fund V. Due to certain voting rights granted to Mr. Revers as a member of ArcLight Partners' investment committee, he may be deemed to indirectly beneficially own the units held by Magnolia. Each of the ArcLight Entities and Mr. Revers disclaims beneficial ownership of the securities held directly or indirectly by Magnolia except to the extent of their respective pecuniary interests therein.

Read SEC document
March 08, 2017 Filed Mar 9, 2017 17:10 UTC JP Energy Partners LP JPEP · Entity 176962 Disposition to issuerCOMMON UNITS (LIMITED PARTNER INTERESTS) 3,674,187 Not disclosed Not disclosed
Disclosure

SEC source: 0001179110-17-004332 · edgar.xml · nonDerivative · entry 1

Magnolia Infrastructure Holdings, LLC · CIK 0001673060 · Director · 10% owner · See Footnotes 2 and 3

ArcLight Capital Partners, LLC · CIK 0001502945 · 10% owner

ArcLight Capital Holdings, LLC · CIK 0001441290 · 10% owner

ARCLIGHT ENERGY PARTNERS FUND V, L.P. · CIK 0001502553 · 10% owner

Revers Daniel R · CIK 0001405456 · Director

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

F1 · kind: Converted into common units of American Midstream Partners, LP ("AMID") in connection with the merger of the issuer into a wholly-owned subsidiary of AMID effective on March 8, 2017 (the "Merger"). On March 7, 2017, the last trading day of the issuer's common units, the closing price of issuer common units was $9.44 per unit and the closing price of AMID's common units was $16.45 per unit. Each issuer common unit outstanding held by the reporting person was converted into 0.5225 AMID common units at the effective time of the Merger.

F1 · price: Converted into common units of American Midstream Partners, LP ("AMID") in connection with the merger of the issuer into a wholly-owned subsidiary of AMID effective on March 8, 2017 (the "Merger"). On March 7, 2017, the last trading day of the issuer's common units, the closing price of issuer common units was $9.44 per unit and the closing price of AMID's common units was $16.45 per unit. Each issuer common unit outstanding held by the reporting person was converted into 0.5225 AMID common units at the effective time of the Merger.

F2 · ownership.direct: This Form 4 is filed jointly by Magnolia Infrastructure Holdings, LLC ("Magnolia", as successor by merger to AL Lonestar, LLC, as successor by merger to Lonestar Midstream Holdings, LLC), ArcLight Capital Partners, LLC ("ArcLight Partners"), ArcLight Capital Holdings, LLC ("ArcLight Holdings"), ArcLight Energy Partners Fund V, L.P. ("ArcLight Fund V" and together with ArcLight Partners and ArcLight Holdings, the "ArcLight Entities") and Daniel R. Revers. Prior to the closing of the Merger, Magnolia owned 100% of the interests in JP Energy GP II LLC, the issuer's general partner (the "General Partner"), and was deemed to indirectly beneficially own the securities held by the General Partner, but disclaimed beneficial ownership except to the extent of its pecuniary interest therein. (Continued in Footnote 3)

F3 · ownership.direct: (Continued from Footnote 2) The General Partner holds a non-economic general partner interest in the issuer. Prior to the closing of the Merger, ArcLight Fund V owned and controlled, through one of its wholly owned subsidiaries, Magnolia, and therefore may have been deemed to indirectly beneficially own the securities held directly and indirectly by Magnolia. Mr. Revers is a director of the General Partner and is managing partner of ArcLight Partners. ArcLight Partners is the investment manager of, and ArcLight Holdings is the managing partner of the general partner of, ArcLight Fund V. Due to certain voting rights granted to Mr. Revers as a member of ArcLight Partners' investment committee, he may be deemed to indirectly beneficially own the units held by Magnolia. Each of the ArcLight Entities and Mr. Revers disclaims beneficial ownership of the securities held directly or indirectly by Magnolia except to the extent of their respective pecuniary interests therein.

Read SEC document
March 08, 2017 Filed Mar 10, 2017 19:11 UTC Third Coast Midstream, LLC AMID · Entity 155869 OtherCommon Units (Limited Partner Interests) 9,753,425 $0.00 $0.00
Disclosure

SEC source: 0000899243-17-007207 · doc4.xml · nonDerivative · entry 1

ARCLIGHT ENERGY PARTNERS FUND V, L.P. · CIK 0001502553 · Director · 10% owner · SEE REMARKS

Magnolia Infrastructure Holdings, LLC · CIK 0001673060 · Director · 10% owner

Magnolia Infrastructure Partners, LLC · CIK 0001638285 · Director · 10% owner

High Point Infrastructure Partners, LLC · CIK 0001575227 · Director · 10% owner

ArcLight Capital Holdings, LLC · CIK 0001441290 · Director · 10% owner

ArcLight Capital Partners, LLC · CIK 0001502945 · Director · 10% owner

Revers Daniel R · CIK 0001405456 · Director · 10% owner

American Midstream GP, LLC · CIK 0001526603 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnote

Disclosed balance after: 13,977,709

F1 · kind: Upon the completion of the acquisition of JP Energy Partners LP ("JPE") by the Issuer pursuant to that certain Agreement and Plan of Merger, dated as of October 23, 2016, by and among the Issuer, American Midstream GP, LLC, JPE, JPE Energy GP II LLC, Argo Merger Sub, LLC and Argo Merger GP Sub, LLC, 3,674,187 JPE common units and 14,992,654 JPE subordinated units owned by Magnolia Infrastructure Holdings, LLC ("Magnolia Holdings"), a direct, wholly owned subsidiary of ArcLight Energy Partners Fund V, L.P. ("Fund V"), were converted into a total of 9,753,425 common units of the Issuer.

F1 · shares: Upon the completion of the acquisition of JP Energy Partners LP ("JPE") by the Issuer pursuant to that certain Agreement and Plan of Merger, dated as of October 23, 2016, by and among the Issuer, American Midstream GP, LLC, JPE, JPE Energy GP II LLC, Argo Merger Sub, LLC and Argo Merger GP Sub, LLC, 3,674,187 JPE common units and 14,992,654 JPE subordinated units owned by Magnolia Infrastructure Holdings, LLC ("Magnolia Holdings"), a direct, wholly owned subsidiary of ArcLight Energy Partners Fund V, L.P. ("Fund V"), were converted into a total of 9,753,425 common units of the Issuer.

F2 · balance_after: Does not include (i) 7,187,358 Series A-1 Convertible Preferred Units (the "Series A-1 Units") held directly by High Point Infrastructure Partners, LLC ("HPIP"), which do not have an expiration date and are convertible in whole or in part on an approximate 1.1027:1 basis into common units at any time after January 1, 2014, (ii) 3,079,284 Series A-2 Convertible Preferred Units held by Magnolia (as defined below), which do not have an expiration date and are convertible in whole or in part on an approximate 1.1027:1 basis into common units at any time, (iii) 8,792,205 Series C Convertible Preferred Units (the "Series C Units")

F3 · balance_after: (Continued from Footnote 2) held by Magnolia Holdings, which do not have an expiration date and are convertible in whole or in part on an approximate 1:1.0036 basis into common units at any time and (iv) 2,333,333 Series D Convertible Preferred Units (the "Series D Units") held by Magnolia Holdings which are convertible in whole or in part on one-for-one basis, subject to anti-dilution and certain other adjustments, into common units at any time after June 30, 2017. On or prior to June 30, 2017, 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 D Units.

F4 · ownership.nature: Busbar directly owns 2,255,754 common units out of the 13,977,709 common units reflected in Column 5. Magnolia Infrastructure Partners, LLC, an indirect, wholly owned subsidiary of Fund V ("Magnolia"), directly owns 618,921 common units out of the 13,977,709 common units reflected in Column 5. American Midstream GP, LLC (the "General Partner") directly owns 1,349,609 common units out of the 13,977,709 common units reflected in Column 5.

Read SEC document
February 13, 2017 Filed Feb 15, 2017 21:28 UTC Third Coast Midstream, LLC AMID · Entity 155869 OtherSeries A-2 Convertible Preferred Units · Derivative 47,742 $15.87 $757,665.54
Disclosure

SEC source: 0000899243-17-004320 · doc4.xml · derivative · entry 2

ARCLIGHT ENERGY PARTNERS FUND V, L.P. · CIK 0001502553 · Director · 10% owner · SEE REMARKS

Magnolia Infrastructure Holdings, LLC · CIK 0001673060 · Director · 10% owner

Magnolia Infrastructure Partners, LLC · CIK 0001638285 · Director · 10% owner

High Point Infrastructure Partners, LLC · CIK 0001575227 · Director · 10% owner

ArcLight Capital Holdings, LLC · CIK 0001441290 · Director · 10% owner

ArcLight Capital Partners, LLC · CIK 0001502945 · Director · 10% owner

Revers Daniel R · CIK 0001405456 · Director · 10% owner

American Midstream GP, LLC · CIK 0001526603 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnote

Disclosed balance after: 3,079,284

Underlying: Common Units · 52,478 shares

Expires not disclosed

F3 · derivative.exercise_price: Represents Series A-2 Convertible Preferred Units (the "Series A-2 Units") held by Magnolia Infrastructure Partners, LLC ("Magnolia") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-2 Units owned on the distribution record date. The Series A-2 Units have no expiration date and are convertible into Common Units at a conversion ratio of 1:1.0992 at any time.

F3 · kind: Represents Series A-2 Convertible Preferred Units (the "Series A-2 Units") held by Magnolia Infrastructure Partners, LLC ("Magnolia") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-2 Units owned on the distribution record date. The Series A-2 Units have no expiration date and are convertible into Common Units at a conversion ratio of 1:1.0992 at any time.

F3 · derivative.exercise_date: Represents Series A-2 Convertible Preferred Units (the "Series A-2 Units") held by Magnolia Infrastructure Partners, LLC ("Magnolia") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-2 Units owned on the distribution record date. The Series A-2 Units have no expiration date and are convertible into Common Units at a conversion ratio of 1:1.0992 at any time.

F3 · derivative.expiration_date: Represents Series A-2 Convertible Preferred Units (the "Series A-2 Units") held by Magnolia Infrastructure Partners, LLC ("Magnolia") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-2 Units owned on the distribution record date. The Series A-2 Units have no expiration date and are convertible into Common Units at a conversion ratio of 1:1.0992 at any time.

F4 · balance_after: Represents the aggregate number of Series A-2 Units held after the acquisition of Series A-2 Units reported in Column 5 of this line item.

F3 · ownership.nature: Represents Series A-2 Convertible Preferred Units (the "Series A-2 Units") held by Magnolia Infrastructure Partners, LLC ("Magnolia") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-2 Units owned on the distribution record date. The Series A-2 Units have no expiration date and are convertible into Common Units at a conversion ratio of 1:1.0992 at any time.

Read SEC document
February 13, 2017 Filed Feb 15, 2017 21:28 UTC Third Coast Midstream, LLC AMID · Entity 155869 OtherSeries A-1 Convertible Preferred Units · Derivative 111,436 $15.87 $1,768,489.32
Disclosure

SEC source: 0000899243-17-004320 · doc4.xml · derivative · entry 1

ARCLIGHT ENERGY PARTNERS FUND V, L.P. · CIK 0001502553 · Director · 10% owner · SEE REMARKS

Magnolia Infrastructure Holdings, LLC · CIK 0001673060 · Director · 10% owner

Magnolia Infrastructure Partners, LLC · CIK 0001638285 · Director · 10% owner

High Point Infrastructure Partners, LLC · CIK 0001575227 · Director · 10% owner

ArcLight Capital Holdings, LLC · CIK 0001441290 · Director · 10% owner

ArcLight Capital Partners, LLC · CIK 0001502945 · Director · 10% owner

Revers Daniel R · CIK 0001405456 · Director · 10% owner

American Midstream GP, LLC · CIK 0001526603 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnote

Disclosed balance after: 7,187,358

Underlying: Common Units · 122,490 shares

Expires not disclosed

F1 · derivative.exercise_price: Represents Series A-1 Convertible Preferred Units (the "Series A-1 Units") held directly by High Point Infrastructure Partners, LLC ("HPIP") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-1 Units owned on the distribution record date. The Series A-1 Units have no expiration date and are convertible in whole or in part into common units of the Issuer ("Common Units") at a conversion ratio of 1:1.0992 at any time.

F1 · kind: Represents Series A-1 Convertible Preferred Units (the "Series A-1 Units") held directly by High Point Infrastructure Partners, LLC ("HPIP") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-1 Units owned on the distribution record date. The Series A-1 Units have no expiration date and are convertible in whole or in part into common units of the Issuer ("Common Units") at a conversion ratio of 1:1.0992 at any time.

F1 · derivative.exercise_date: Represents Series A-1 Convertible Preferred Units (the "Series A-1 Units") held directly by High Point Infrastructure Partners, LLC ("HPIP") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-1 Units owned on the distribution record date. The Series A-1 Units have no expiration date and are convertible in whole or in part into common units of the Issuer ("Common Units") at a conversion ratio of 1:1.0992 at any time.

F1 · derivative.expiration_date: Represents Series A-1 Convertible Preferred Units (the "Series A-1 Units") held directly by High Point Infrastructure Partners, LLC ("HPIP") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-1 Units owned on the distribution record date. The Series A-1 Units have no expiration date and are convertible in whole or in part into common units of the Issuer ("Common Units") at a conversion ratio of 1:1.0992 at any time.

F2 · balance_after: Represents the aggregate number of Series A-1 Units held after the acquisition of Series A-1 Units reported in Column 5 of this line item.

F1 · ownership.nature: Represents Series A-1 Convertible Preferred Units (the "Series A-1 Units") held directly by High Point Infrastructure Partners, LLC ("HPIP") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-1 Units owned on the distribution record date. The Series A-1 Units have no expiration date and are convertible in whole or in part into common units of the Issuer ("Common Units") at a conversion ratio of 1:1.0992 at any time.

Read SEC document
December 01, 2016 Filed Dec 5, 2016 14:51 UTC Third Coast Midstream, LLC AMID · Entity 155869 PurchaseCommon Units (Limited Partner Interests) 626,304 $14.32 $8,968,673.28
Disclosure

SEC source: 0000899243-16-034891 · doc4.xml · nonDerivative · entry 1

ARCLIGHT ENERGY PARTNERS FUND V, L.P. · CIK 0001502553 · Director · 10% owner · SEE REMARKS

Magnolia Infrastructure Holdings, LLC · CIK 0001673060 · Director · 10% owner

Magnolia Infrastructure Partners, LLC · CIK 0001638285 · Director · 10% owner

High Point Infrastructure Partners, LLC · CIK 0001575227 · Director · 10% owner

ArcLight Capital Holdings, LLC · CIK 0001441290 · Director · 10% owner

ArcLight Capital Partners, LLC · CIK 0001502945 · Director · 10% owner

Revers Daniel R · CIK 0001405456 · Director · 10% owner

American Midstream GP, LLC · CIK 0001526603 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnote

Disclosed balance after: 4,224,284

F1 · shares: Common units were purchased from AIM Midstream Holdings, LLC by Busbar II, LLC ("Busbar"), a direct, wholly owned subsidiary of ArcLight Energy Partners Fund V, L.P. ("Fund V").

F2 · balance_after: Does not include (i) 7,075,922 Series A-1 Convertible Preferred Units (the "Series A-1 Units") held directly by High Point Infrastructure Partners, LLC ("HPIP"), which do not have an expiration date and are convertible in whole or in part on an approximate 1.0992:1 basis into common units at any time after January 1, 2014, (ii) 3,031,542 Series A-2 Convertible Preferred Units held by Magnolia (as defined below), which do not have an expiration date and are convertible in whole or in part on an approximate 1.0992:1 basis into common units at any time, (iii) 8,792,205 Series C Convertible Preferred Units (the "Series C Units") held directly by Magnolia Infrastructure Holdings, LLC ("Magnolia Holdings"), which do not have an expiration date and are convertible in whole or in part on an approximate 1:1.0007 basis into common units at any time and (iv) 2,333,333 Series D Convertible Preferred Units (the "Series D Units")

F3 · balance_after: (Continued from Footnote 2) held directly by Magnolia Holdings and are convertible in whole or in part on one-for-one basis, subject to anti-dilution and certain other adjustments, into common units at any time after June 30, 2017. On or prior to June 30, 2017, 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 D Units.

F4 · ownership.nature: Busbar directly owns 2,255,754 common units out of the 4,224,284 common units reflected in Column 5. Magnolia Infrastructure Partners, LLC, an indirect, wholly owned subsidiary of Fund V ("Magnolia"), directly owns 618,921 common units out of the 4,224,284 common units reflected in Column 5. American Midstream GP, LLC (the "General Partner") directly owns 1,349,609 common units out of the 4,224,284 common units reflected in Column 5.

Read SEC document
November 14, 2016 Filed Nov 16, 2016 19:23 UTC Third Coast Midstream, LLC AMID · Entity 155869 OtherSeries C Convertible Preferred Units · Derivative 127,737 $13.99 $1,787,040.63
Disclosure

SEC source: 0000899243-16-033707 · doc4.xml · derivative · entry 3

ARCLIGHT ENERGY PARTNERS FUND V, L.P. · CIK 0001502553 · Director · 10% owner · SEE REMARKS

Magnolia Infrastructure Holdings, LLC · CIK 0001673060 · Director · 10% owner

Magnolia Infrastructure Partners, LLC · CIK 0001638285 · Director · 10% owner

High Point Infrastructure Partners, LLC · CIK 0001575227 · Director · 10% owner

ArcLight Capital Holdings, LLC · CIK 0001441290 · Director · 10% owner

ArcLight Capital Partners, LLC · CIK 0001502945 · Director · 10% owner

Revers Daniel R · CIK 0001405456 · Director · 10% owner

American Midstream GP, LLC · CIK 0001526603 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnote

Disclosed balance after: 8,792,205

Underlying: Common Units · 127,826 shares

Expires not disclosed

F3 · derivative.exercise_price: Represents Series A-2 Convertible Preferred Units (the "Series A-2 Units") held by Magnolia Infrastructure Partners, LLC ("Magnolia") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-2 Units owned on the distribution record date. The Series A-2 Units have no expiration date and are convertible into Common Units at a conversion ratio of 1:1.0992 at any time.

F5 · kind: Represents Series C Convertible Preferred Units (the "Series C Units") held directly by Magnolia Infrastructure Holdings, LLC ("Magnolia Holdings") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series C Units owned on the distribution record date. The Series C Units have no expiration date and are convertible into Common Units at anytime at the holder's election, at a conversion ratio of 1:1.0007, 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.

F5 · derivative.exercise_date: Represents Series C Convertible Preferred Units (the "Series C Units") held directly by Magnolia Infrastructure Holdings, LLC ("Magnolia Holdings") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series C Units owned on the distribution record date. The Series C Units have no expiration date and are convertible into Common Units at anytime at the holder's election, at a conversion ratio of 1:1.0007, 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.

F5 · derivative.expiration_date: Represents Series C Convertible Preferred Units (the "Series C Units") held directly by Magnolia Infrastructure Holdings, LLC ("Magnolia Holdings") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series C Units owned on the distribution record date. The Series C Units have no expiration date and are convertible into Common Units at anytime at the holder's election, at a conversion ratio of 1:1.0007, 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.

F6 · balance_after: Represents the aggregate number of Series C Units held after the acquisition of Series C Units reported in Column 5 of this line item.

F5 · ownership.nature: Represents Series C Convertible Preferred Units (the "Series C Units") held directly by Magnolia Infrastructure Holdings, LLC ("Magnolia Holdings") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series C Units owned on the distribution record date. The Series C Units have no expiration date and are convertible into Common Units at anytime at the holder's election, at a conversion ratio of 1:1.0007, 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.

Read SEC document
November 14, 2016 Filed Nov 16, 2016 19:23 UTC Third Coast Midstream, LLC AMID · Entity 155869 OtherSeries A-2 Convertible Preferred Units · Derivative 46,870 $15.92 $746,170.40
Disclosure

SEC source: 0000899243-16-033707 · doc4.xml · derivative · entry 2

ARCLIGHT ENERGY PARTNERS FUND V, L.P. · CIK 0001502553 · Director · 10% owner · SEE REMARKS

Magnolia Infrastructure Holdings, LLC · CIK 0001673060 · Director · 10% owner

Magnolia Infrastructure Partners, LLC · CIK 0001638285 · Director · 10% owner

High Point Infrastructure Partners, LLC · CIK 0001575227 · Director · 10% owner

ArcLight Capital Holdings, LLC · CIK 0001441290 · Director · 10% owner

ArcLight Capital Partners, LLC · CIK 0001502945 · Director · 10% owner

Revers Daniel R · CIK 0001405456 · Director · 10% owner

American Midstream GP, LLC · CIK 0001526603 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnote

Disclosed balance after: 3,031,542

Underlying: Common Units · 51,520 shares

Expires not disclosed

F3 · derivative.exercise_price: Represents Series A-2 Convertible Preferred Units (the "Series A-2 Units") held by Magnolia Infrastructure Partners, LLC ("Magnolia") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-2 Units owned on the distribution record date. The Series A-2 Units have no expiration date and are convertible into Common Units at a conversion ratio of 1:1.0992 at any time.

F3 · kind: Represents Series A-2 Convertible Preferred Units (the "Series A-2 Units") held by Magnolia Infrastructure Partners, LLC ("Magnolia") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-2 Units owned on the distribution record date. The Series A-2 Units have no expiration date and are convertible into Common Units at a conversion ratio of 1:1.0992 at any time.

F3 · derivative.exercise_date: Represents Series A-2 Convertible Preferred Units (the "Series A-2 Units") held by Magnolia Infrastructure Partners, LLC ("Magnolia") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-2 Units owned on the distribution record date. The Series A-2 Units have no expiration date and are convertible into Common Units at a conversion ratio of 1:1.0992 at any time.

F3 · derivative.expiration_date: Represents Series A-2 Convertible Preferred Units (the "Series A-2 Units") held by Magnolia Infrastructure Partners, LLC ("Magnolia") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-2 Units owned on the distribution record date. The Series A-2 Units have no expiration date and are convertible into Common Units at a conversion ratio of 1:1.0992 at any time.

F4 · balance_after: Represents the aggregate number of Series A-2 Units held after the acquisition of Series A-2 Units reported in Column 5 of this line item.

F3 · ownership.nature: Represents Series A-2 Convertible Preferred Units (the "Series A-2 Units") held by Magnolia Infrastructure Partners, LLC ("Magnolia") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-2 Units owned on the distribution record date. The Series A-2 Units have no expiration date and are convertible into Common Units at a conversion ratio of 1:1.0992 at any time.

Read SEC document
November 14, 2016 Filed Nov 16, 2016 19:23 UTC Third Coast Midstream, LLC AMID · Entity 155869 OtherSeries A-1 Convertible Preferred Units · Derivative 109,399 $15.92 $1,741,632.08
Disclosure

SEC source: 0000899243-16-033707 · doc4.xml · derivative · entry 1

ARCLIGHT ENERGY PARTNERS FUND V, L.P. · CIK 0001502553 · Director · 10% owner · SEE REMARKS

Magnolia Infrastructure Holdings, LLC · CIK 0001673060 · Director · 10% owner

Magnolia Infrastructure Partners, LLC · CIK 0001638285 · Director · 10% owner

High Point Infrastructure Partners, LLC · CIK 0001575227 · Director · 10% owner

ArcLight Capital Holdings, LLC · CIK 0001441290 · Director · 10% owner

ArcLight Capital Partners, LLC · CIK 0001502945 · Director · 10% owner

Revers Daniel R · CIK 0001405456 · Director · 10% owner

American Midstream GP, LLC · CIK 0001526603 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnote

Disclosed balance after: 7,075,922

Underlying: Common Units · 120,251 shares

Expires not disclosed

F1 · derivative.exercise_price: Represents Series A-1 Convertible Preferred Units (the "Series A-1 Units") held directly by High Point Infrastructure Partners, LLC ("HPIP") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-1 Units owned on the distribution record date. The Series A-1 Units have no expiration date and are convertible in whole or in part into common units of the Issuer ("Common Units") at a conversion ratio of 1:1.0992 at any time.

F1 · kind: Represents Series A-1 Convertible Preferred Units (the "Series A-1 Units") held directly by High Point Infrastructure Partners, LLC ("HPIP") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-1 Units owned on the distribution record date. The Series A-1 Units have no expiration date and are convertible in whole or in part into common units of the Issuer ("Common Units") at a conversion ratio of 1:1.0992 at any time.

F1 · derivative.exercise_date: Represents Series A-1 Convertible Preferred Units (the "Series A-1 Units") held directly by High Point Infrastructure Partners, LLC ("HPIP") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-1 Units owned on the distribution record date. The Series A-1 Units have no expiration date and are convertible in whole or in part into common units of the Issuer ("Common Units") at a conversion ratio of 1:1.0992 at any time.

F1 · derivative.expiration_date: Represents Series A-1 Convertible Preferred Units (the "Series A-1 Units") held directly by High Point Infrastructure Partners, LLC ("HPIP") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-1 Units owned on the distribution record date. The Series A-1 Units have no expiration date and are convertible in whole or in part into common units of the Issuer ("Common Units") at a conversion ratio of 1:1.0992 at any time.

F2 · balance_after: Represents the aggregate number of Series A-1 Units held after the acquisition of Series A-1 Units reported in Column 5 of this line item.

F1 · ownership.nature: Represents Series A-1 Convertible Preferred Units (the "Series A-1 Units") held directly by High Point Infrastructure Partners, LLC ("HPIP") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-1 Units owned on the distribution record date. The Series A-1 Units have no expiration date and are convertible in whole or in part into common units of the Issuer ("Common Units") at a conversion ratio of 1:1.0992 at any time.

Read SEC document
October 31, 2016 Filed Nov 2, 2016 18:57 UTC Third Coast Midstream, LLC AMID · Entity 155869 PurchaseSeries D Convertible Preferred Units · Derivative 2,333,333 $15.00 $34,999,995.00
Disclosure

SEC source: 0000899243-16-032661 · doc4.xml · derivative · entry 4

ARCLIGHT ENERGY PARTNERS FUND V, L.P. · CIK 0001502553 · Director · 10% owner · SEE REMARKS

Magnolia Infrastructure Holdings, LLC · CIK 0001673060 · Director · 10% owner

Magnolia Infrastructure Partners, LLC · CIK 0001638285 · Director · 10% owner

High Point Infrastructure Partners, LLC · CIK 0001575227 · Director · 10% owner

ArcLight Capital Holdings, LLC · CIK 0001441290 · Director · 10% owner

ArcLight Capital Partners, LLC · CIK 0001502945 · Director · 10% owner

Revers Daniel R · CIK 0001405456 · Director · 10% owner

American Midstream GP, LLC · CIK 0001526603 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnote

Disclosed balance after: 2,333,333

Underlying: Common Units · 2,333,333 shares

Expires not disclosed

F7 · derivative.exercise_price: Represents Series D Convertible Preferred Units (the "Series D Units") purchased by Magnolia Holdings. The Series D Units have no expiration date and are convertible after June 30, 2017 into Common Units at the holder's election, initially on a one-for-one basis, subject to anti-dilution and certain other adjustments. On or prior to June 30, 2017, 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 D Units.

F7 · kind: Represents Series D Convertible Preferred Units (the "Series D Units") purchased by Magnolia Holdings. The Series D Units have no expiration date and are convertible after June 30, 2017 into Common Units at the holder's election, initially on a one-for-one basis, subject to anti-dilution and certain other adjustments. On or prior to June 30, 2017, 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 D Units.

F7 · derivative.exercise_date: Represents Series D Convertible Preferred Units (the "Series D Units") purchased by Magnolia Holdings. The Series D Units have no expiration date and are convertible after June 30, 2017 into Common Units at the holder's election, initially on a one-for-one basis, subject to anti-dilution and certain other adjustments. On or prior to June 30, 2017, 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 D Units.

F7 · derivative.expiration_date: Represents Series D Convertible Preferred Units (the "Series D Units") purchased by Magnolia Holdings. The Series D Units have no expiration date and are convertible after June 30, 2017 into Common Units at the holder's election, initially on a one-for-one basis, subject to anti-dilution and certain other adjustments. On or prior to June 30, 2017, 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 D Units.

F7 · ownership.nature: Represents Series D Convertible Preferred Units (the "Series D Units") purchased by Magnolia Holdings. The Series D Units have no expiration date and are convertible after June 30, 2017 into Common Units at the holder's election, initially on a one-for-one basis, subject to anti-dilution and certain other adjustments. On or prior to June 30, 2017, 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 D Units.

Read SEC document
August 12, 2016 Filed Nov 2, 2016 18:57 UTC Third Coast Midstream, LLC AMID · Entity 155869 OtherSeries C Convertible Preferred Units · Derivative 93,039 $14.00 $1,302,546.00
Disclosure

SEC source: 0000899243-16-032661 · doc4.xml · derivative · entry 3

ARCLIGHT ENERGY PARTNERS FUND V, L.P. · CIK 0001502553 · Director · 10% owner · SEE REMARKS

Magnolia Infrastructure Holdings, LLC · CIK 0001673060 · Director · 10% owner

Magnolia Infrastructure Partners, LLC · CIK 0001638285 · Director · 10% owner

High Point Infrastructure Partners, LLC · CIK 0001575227 · Director · 10% owner

ArcLight Capital Holdings, LLC · CIK 0001441290 · Director · 10% owner

ArcLight Capital Partners, LLC · CIK 0001502945 · Director · 10% owner

Revers Daniel R · CIK 0001405456 · Director · 10% owner

American Midstream GP, LLC · CIK 0001526603 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnote

Disclosed balance after: 8,664,468

Underlying: Common Units · 93,039 shares

Expires not disclosed

F3 · derivative.exercise_price: Represents Series A-2 Convertible Preferred Units (the "Series A-2 Units") held by Magnolia Infrastructure Partners, LLC ("Magnolia") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-@ Units owned on the distribution record date. The Series A-2 Units have no expiration date and are convertible into Common Units at a conversion ratio of 1:1.098 at any time.

F5 · kind: Represents Series C Convertible Preferred Units (the "Series C Units") held directly by Magnolia Infrastructure Holdings, LLC ("Magnolia Holdings") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series C Units owned on the distribution record date. The Series C Units have no expiration date and are convertible into Common Units 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.

F5 · derivative.exercise_date: Represents Series C Convertible Preferred Units (the "Series C Units") held directly by Magnolia Infrastructure Holdings, LLC ("Magnolia Holdings") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series C Units owned on the distribution record date. The Series C Units have no expiration date and are convertible into Common Units 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.

F5 · derivative.expiration_date: Represents Series C Convertible Preferred Units (the "Series C Units") held directly by Magnolia Infrastructure Holdings, LLC ("Magnolia Holdings") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series C Units owned on the distribution record date. The Series C Units have no expiration date and are convertible into Common Units 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.

F6 · balance_after: Represents the aggregate number of Series C Units held after the acquisition of Series C Units reported in Column 5 of this line item.

F5 · ownership.nature: Represents Series C Convertible Preferred Units (the "Series C Units") held directly by Magnolia Infrastructure Holdings, LLC ("Magnolia Holdings") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series C Units owned on the distribution record date. The Series C Units have no expiration date and are convertible into Common Units 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.

Read SEC document
August 12, 2016 Filed Nov 2, 2016 18:57 UTC Third Coast Midstream, LLC AMID · Entity 155869 OtherSeries A-2 Convertible Preferred Units · Derivative 46,145 $15.94 $735,551.30
Disclosure

SEC source: 0000899243-16-032661 · doc4.xml · derivative · entry 2

ARCLIGHT ENERGY PARTNERS FUND V, L.P. · CIK 0001502553 · Director · 10% owner · SEE REMARKS

Magnolia Infrastructure Holdings, LLC · CIK 0001673060 · Director · 10% owner

Magnolia Infrastructure Partners, LLC · CIK 0001638285 · Director · 10% owner

High Point Infrastructure Partners, LLC · CIK 0001575227 · Director · 10% owner

ArcLight Capital Holdings, LLC · CIK 0001441290 · Director · 10% owner

ArcLight Capital Partners, LLC · CIK 0001502945 · Director · 10% owner

Revers Daniel R · CIK 0001405456 · Director · 10% owner

American Midstream GP, LLC · CIK 0001526603 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnote

Disclosed balance after: 2,984,672

Underlying: Common Units · 50,652 shares

Expires not disclosed

F3 · derivative.exercise_price: Represents Series A-2 Convertible Preferred Units (the "Series A-2 Units") held by Magnolia Infrastructure Partners, LLC ("Magnolia") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-@ Units owned on the distribution record date. The Series A-2 Units have no expiration date and are convertible into Common Units at a conversion ratio of 1:1.098 at any time.

F3 · kind: Represents Series A-2 Convertible Preferred Units (the "Series A-2 Units") held by Magnolia Infrastructure Partners, LLC ("Magnolia") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-@ Units owned on the distribution record date. The Series A-2 Units have no expiration date and are convertible into Common Units at a conversion ratio of 1:1.098 at any time.

F3 · derivative.exercise_date: Represents Series A-2 Convertible Preferred Units (the "Series A-2 Units") held by Magnolia Infrastructure Partners, LLC ("Magnolia") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-@ Units owned on the distribution record date. The Series A-2 Units have no expiration date and are convertible into Common Units at a conversion ratio of 1:1.098 at any time.

F3 · derivative.expiration_date: Represents Series A-2 Convertible Preferred Units (the "Series A-2 Units") held by Magnolia Infrastructure Partners, LLC ("Magnolia") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-@ Units owned on the distribution record date. The Series A-2 Units have no expiration date and are convertible into Common Units at a conversion ratio of 1:1.098 at any time.

F4 · balance_after: Represents the aggregate number of Series A-2 Units held after the acquisition of Series A-2 Units reported in Column 5 of this line item.

F3 · ownership.nature: Represents Series A-2 Convertible Preferred Units (the "Series A-2 Units") held by Magnolia Infrastructure Partners, LLC ("Magnolia") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-@ Units owned on the distribution record date. The Series A-2 Units have no expiration date and are convertible into Common Units at a conversion ratio of 1:1.098 at any time.

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August 12, 2016 Filed Nov 2, 2016 18:57 UTC Third Coast Midstream, LLC AMID · Entity 155869 OtherSeries A-1 Convertible Preferred Units · Derivative 107,708 $15.94 $1,716,865.52
Disclosure

SEC source: 0000899243-16-032661 · doc4.xml · derivative · entry 1

ARCLIGHT ENERGY PARTNERS FUND V, L.P. · CIK 0001502553 · Director · 10% owner · SEE REMARKS

Magnolia Infrastructure Holdings, LLC · CIK 0001673060 · Director · 10% owner

Magnolia Infrastructure Partners, LLC · CIK 0001638285 · Director · 10% owner

High Point Infrastructure Partners, LLC · CIK 0001575227 · Director · 10% owner

ArcLight Capital Holdings, LLC · CIK 0001441290 · Director · 10% owner

ArcLight Capital Partners, LLC · CIK 0001502945 · Director · 10% owner

Revers Daniel R · CIK 0001405456 · Director · 10% owner

American Midstream GP, LLC · CIK 0001526603 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnote

Disclosed balance after: 6,966,523

Underlying: Common Units · 118,227 shares

Expires not disclosed

F1 · derivative.exercise_price: Represents Series A-1 Convertible Preferred Units (the "Series A-1 Units") held directly by High Point Infrastructure Partners, LLC ("HPIP") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-1 Units owned on the distribution record date. The Series A-1 Units have no expiration date and are convertible in whole or in part into common units of the Issuer ("Common Units") at a conversion ratio of 1:1.098 at any time.

F1 · kind: Represents Series A-1 Convertible Preferred Units (the "Series A-1 Units") held directly by High Point Infrastructure Partners, LLC ("HPIP") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-1 Units owned on the distribution record date. The Series A-1 Units have no expiration date and are convertible in whole or in part into common units of the Issuer ("Common Units") at a conversion ratio of 1:1.098 at any time.

F1 · derivative.exercise_date: Represents Series A-1 Convertible Preferred Units (the "Series A-1 Units") held directly by High Point Infrastructure Partners, LLC ("HPIP") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-1 Units owned on the distribution record date. The Series A-1 Units have no expiration date and are convertible in whole or in part into common units of the Issuer ("Common Units") at a conversion ratio of 1:1.098 at any time.

F1 · derivative.expiration_date: Represents Series A-1 Convertible Preferred Units (the "Series A-1 Units") held directly by High Point Infrastructure Partners, LLC ("HPIP") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-1 Units owned on the distribution record date. The Series A-1 Units have no expiration date and are convertible in whole or in part into common units of the Issuer ("Common Units") at a conversion ratio of 1:1.098 at any time.

F2 · balance_after: Represents the aggregate number of Series A-1 Units held after the acquisition of Series A-1 Units reported in Column 5 of this line item.

F1 · ownership.nature: Represents Series A-1 Convertible Preferred Units (the "Series A-1 Units") held directly by High Point Infrastructure Partners, LLC ("HPIP") received on a quarterly basis as payment-in-kind in lieu of cash distributions on the Series A-1 Units owned on the distribution record date. The Series A-1 Units have no expiration date and are convertible in whole or in part into common units of the Issuer ("Common Units") at a conversion ratio of 1:1.098 at any time.

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Value uses the disclosed total when available, otherwise shares × reported transaction price. It is not an estimate of exercise cash cost or investment performance.