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Heronetta Management, L.P.

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13F filer, CIK 1588225, NEW YORK, NY

Heronetta Management, L.P. reported $109,570,600 across 16 holdings for the quarter ended 2026-03-31, in a 13F-HR filed 2026-05-01. Its ten largest share positions make up 96.49% of the portfolio.

Filed (acceptance time not in the bulk data set), ingested 13F-HR 0000922423-26-000014

The filing omits holdings under a confidential treatment request (H8). A later amendment may add them.

Period
2026-03-31
Reported value
$110M
Holdings
16
Top 10 weight
96.49%
New
0
Sold out
9

Largest buys vs the previous quarter

SecurityShares changeApprox. value
WMBadded+1,250$91K
TRGPadded+100$25.1K
MPLXadded+400$22.8K

Ranked by the share change valued at this quarter's implied price (value over shares in the 13F). A position sold out is valued at the previous quarter's price, its last report.

Largest sells vs the previous quarter

SecurityShares changeApprox. value
ENBreduced-177,759-$9.62M
CPexited-89,300-$9.02M
CNQexited-193,600-$9M
PBAreduced-180,000-$8.06M
SUexited-132,000-$8.04M

Ranked by the share change valued at this quarter's implied price (value over shares in the 13F). A position sold out is valued at the previous quarter's price, its last report.

Holdings, Q1 2026

Share positions as resolved from 13F-HR 0000922423-26-000014, largest first. % of portfolio is the value over $109,570,600, the sum of the share positions whose value is usable for ratios (method).

SecurityHistorySharesValue% of portfolioChangeLatest eventTimeline
EPDENTERPRISE PRODS PARTNERS LQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q2: restricted; 2024Q3: 558,648 shares; 2024Q4: 554,548 shares; 2025Q1: 549,248 shares; 2025Q2: 549,248 shares; 2025Q3: 549,248 shares; 2025Q4: 496,448 shares; 2026Q1: 495,048 shares 495,048$18.7M17.1%-1,400The filing omitted confidential holdings, a later amendment may add them.Timeline
MPLXMPLX LPQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q2: restricted; 2024Q3: 358,364 shares; 2024Q4: 355,564 shares; 2025Q1: 356,064 shares; 2025Q2: 356,064 shares; 2025Q3: 356,064 shares; 2025Q4: 323,639 shares; 2026Q1: 324,039 shares 324,039$18.5M16.88%+400The filing omitted confidential holdings, a later amendment may add them.Timeline
WMBWILLIAMS COS INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q2: restricted; 2024Q3: 277,377 shares; 2024Q4: 277,377 shares; 2025Q1: 276,277 shares; 2025Q2: 276,277 shares; 2025Q3: 276,277 shares; 2025Q4: 250,152 shares; 2026Q1: 251,402 shares 251,402$18.3M16.7%+1,250The filing omitted confidential holdings, a later amendment may add them.Timeline
ETENERGY TRANSFER L PQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q2: restricted; 2024Q3: 891,554 shares; 2024Q4: 884,654 shares; 2025Q1: 884,154 shares; 2025Q2: 884,154 shares; 2025Q3: 884,154 shares; 2025Q4: 802,129 shares; 2026Q1: 799,229 shares 799,229$15.4M14.08%-2,900The filing omitted confidential holdings, a later amendment may add them.Timeline
OKEONEOK INC NEWQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q2: restricted; 2024Q3: 158,252 shares; 2024Q4: 158,252 shares; 2025Q1: 156,802 shares; 2025Q2: 156,802 shares; 2025Q3: 155,802 shares; 2025Q4: 141,402 shares; 2026Q1: 140,802 shares 140,802$12.7M11.62%-600The filing omitted confidential holdings, a later amendment may add them.Timeline
WESWESTERN MIDSTREAM PARTNERS LQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q2: restricted; 2024Q3: 228,673 shares; 2024Q4: 228,673 shares; 2025Q1: 227,773 shares; 2025Q2: 228,586 shares; 2025Q3: 228,586 shares; 2025Q4: 206,361 shares; 2026Q1: 206,361 shares 206,361$8.5M7.75%0The filing omitted confidential holdings, a later amendment may add them.Timeline
PAGPPLAINS GP HLDGS L PQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q2: restricted; 2024Q3: 196,395 shares; 2024Q4: 196,395 shares; 2025Q1: 196,395 shares; 2025Q2: 198,525 shares; 2025Q3: 198,525 shares; 2025Q4: 183,325 shares; 2026Q1: 181,025 shares 181,025$4.4M4.01%-2,300The filing omitted confidential holdings, a later amendment may add them.Timeline
HESMHESS MIDSTREAM LPQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q2: restricted; 2024Q3: 104,455 shares; 2024Q4: 104,455 shares; 2025Q1: 102,955 shares; 2025Q2: 102,955 shares; 2025Q3: 102,955 shares; 2025Q4: 93,905 shares; 2026Q1: 92,505 shares 92,505$3.6M3.28%-1,400The filing omitted confidential holdings, a later amendment may add them.Timeline
KMIKINDER MORGAN INC DELQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q2: restricted; 2024Q3: 95,125 shares; 2024Q4: 95,125 shares; 2025Q1: 95,125 shares; 2025Q2: 95,125 shares; 2025Q3: 95,125 shares; 2025Q4: 88,725 shares; 2026Q1: 88,725 shares 88,725$2.97M2.72%0The filing omitted confidential holdings, a later amendment may add them.Timeline
TRGPTARGA RES CORPQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q2: restricted; 2024Q3: 10,142 shares; 2024Q4: 10,142 shares; 2025Q1: 10,242 shares; 2025Q2: 10,242 shares; 2025Q3: 10,242 shares; 2025Q4: 10,242 shares; 2026Q1: 10,342 shares 10,342$2.59M2.37%+100The filing omitted confidential holdings, a later amendment may add them.Timeline
ENBENBRIDGE INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q2: restricted; 2024Q3: 197,374 shares; 2024Q4: 197,374 shares; 2025Q1: 197,374 shares; 2025Q2: 193,266 shares; 2025Q3: 193,266 shares; 2025Q4: 193,266 shares; 2026Q1: 15,507 shares 15,507$840K0.77%-177,759The filing omitted confidential holdings, a later amendment may add them.Timeline
PBAPEMBINA PIPELINE CORPQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q2: restricted; 2024Q3: 195,698 shares; 2024Q4: 197,698 shares; 2025Q1: 197,698 shares; 2025Q2: 197,698 shares; 2025Q3: 197,698 shares; 2025Q4: 197,698 shares; 2026Q1: 17,698 shares 17,698$792K0.72%-180,000The filing omitted confidential holdings, a later amendment may add them.Timeline
TRPTC ENERGY CORPQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q2: restricted; 2024Q3: 127,486 shares; 2024Q4: 127,486 shares; 2025Q1: 127,486 shares; 2025Q2: 135,316 shares; 2025Q3: 137,316 shares; 2025Q4: 137,316 shares; 2026Q1: 11,816 shares 11,816$740K0.68%-125,500The filing omitted confidential holdings, a later amendment may add them.Timeline
LNGCHENIERE ENERGY INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q2: restricted; 2024Q3: 2,113 shares; 2024Q4: 2,113 shares; 2025Q1: 2,213 shares; 2025Q2: 2,497 shares; 2025Q3: 2,497 shares; 2025Q4: 2,497 shares; 2026Q1: 2,497 shares 2,497$709K0.65%0The filing omitted confidential holdings, a later amendment may add them.Timeline
AMANTERO MIDSTREAM CORPQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q2: restricted; 2024Q3: 16,910 shares; 2024Q4: 16,910 shares; 2025Q1: 16,910 shares; 2025Q2: 16,910 shares; 2025Q3: 16,910 shares; 2025Q4: 16,910 shares; 2026Q1: 16,910 shares 16,910$386K0.35%0The filing omitted confidential holdings, a later amendment may add them.Timeline
CQPCHENIERE ENERGY PARTNERS L PQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q2: restricted; 2024Q3: 5,810 shares; 2024Q4: 5,810 shares; 2025Q1: 5,810 shares; 2025Q2: 5,810 shares; 2025Q3: 5,810 shares; 2025Q4: 5,810 shares; 2026Q1: 5,810 shares 5,810$376K0.34%0The filing omitted confidential holdings, a later amendment may add them.Timeline

Sold out in Q1 2026

Positions in the previous quarter's report that this quarter's report no longer lists.

SecurityShares beforeValue beforeType
CPCANADIAN PACIFIC KANSAS CITY89,300$9.02Mshares
CNQCANADIAN NAT RES LTD MED TER193,600$9Mshares
SUSUNCOR ENERGY INC NEW132,000$8.04Mshares
CNICANADIAN NATL RY CO53,400$7.25Mshares
FTSFORTIS INC86,000$6.14Mshares
EMAEMERA INC66,500$4.5Mshares
TACTRANSALTA CORP122,000$2.12Mshares
SOBOSOUTH BOW CORP46,497$1.73Mshares
CVECENOVUS ENERGY INC15,000$348Kshares

How Q1 2026 was built

Available 13F filings of this filer for the quarter and their roles: the base report is the latest original or restatement, NEW HOLDINGS amendments filed after it are added (method).

FilingRoleAmendmentFiledAcceptedIngested
13F-HR 0000922423-26-000014 base2026-05-01acceptance time not in the bulk data set