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Super Investors Heronetta Management, L.P.
HM

Heronetta Management, L.P.

Quarterly 13F snapshot: US-listed longs only, no performance figures — 13F data cannot support them.

Portfolio value
$109M
Positions
15
Quarter ended
June 30, 2026
Filed
July 28, 2026

Reported portfolio value by quarter (55 quarters reported)

$261M $83.8M
Q4 12 Q3 15 Q2 18 Q1 21 Q4 23 Q2 26

$143M in Q4 2012 → $109M now. Hover for any quarter.

Holdings

As reported for the quarter ended June 30, 2026. Activity is the change in share count since the prior quarter's filing.

Holding % of portfolio Activity Shares Value
WC Williams Cos Inc 17.2% Unchanged 251,402 $18.7M
Mplx LP 16.8% Unchanged 324,039 $18.3M
EP Enterprise Prods Partners L 16.7% Unchanged 495,048 $18.2M
ET Energy Transfer L P 14.0% Unchanged 799,229 $15.3M
ON Oneok Inc New 11.2% Unchanged 140,802 $12.2M
WM Western Midstream Partners L 8.3% Unchanged 206,361 $9.03M
PG Plains Gp Hldgs L P 4.0% Unchanged 181,025 $4.39M
Hess Midstream LP 3.2% Unchanged 92,505 $3.48M
KM Kinder Morgan Inc Del 2.6% Unchanged 88,725 $2.84M
TR Targa Res Corp 2.5% Unchanged 10,342 $2.77M
Cheniere Energy Inc 0.9% Added 56% 3,897 $931K
Enbridge Inc 0.8% Unchanged 15,507 $841K
Pembina Pipeline Corp 0.8% Unchanged 17,698 $819K
Tc Energy Corp 0.7% Unchanged 11,816 $783K
Antero Midstream Corp 0.4% Unchanged 16,910 $385K

Timeline of changes

What changed each quarter, from the filings' own share counts. Largest moves first; most recent 8 quarters.

Q2 2026

quarter ended June 30, 2026 · filed July 28, 2026

Company Action Shares changed Value of change % of portfolio
CE Cheniere Energy Partners L P Exited −5,810 −$376K —
Cheniere Energy Inc Added +1,400 +$335K 0.9%

Q1 2026

quarter ended March 31, 2026 · filed May 01, 2026

Company Action Shares changed Value of change % of portfolio
Enbridge Inc Trimmed −177,759 −$9.62M 0.8%
Canadian Pacific Kansas City Exited −89,300 −$9.02M —
CN Canadian Nat Res Ltd Exited −193,600 −$9M —
Pembina Pipeline Corp Trimmed −180,000 −$8.06M 0.7%
SE Suncor Energy Inc New Exited −132,000 −$8.04M —
Tc Energy Corp Trimmed −125,500 −$7.86M 0.7%
CN Canadian Natl Ry Co Exited −53,400 −$7.25M —
Fortis Inc Exited −86,000 −$6.14M —
Emera Inc Exited −66,500 −$4.5M —
Transalta Corp Exited −122,000 −$2.12M —

Showing the 10 largest of 20 changes.

Q4 2025

quarter ended December 31, 2025 · filed February 04, 2026

Company Action Shares changed Value of change % of portfolio
Mplx LP Trimmed −32,425 −$1.73M 10.0%
EP Enterprise Prods Partners L Trimmed −52,800 −$1.69M 9.2%
WC Williams Cos Inc Trimmed −26,125 −$1.57M 8.7%
ET Energy Transfer L P Trimmed −82,025 −$1.35M 7.6%
ON Oneok Inc New Trimmed −14,400 −$1.06M 6.0%
WM Western Midstream Partners L Trimmed −22,225 −$878K 4.7%
Hess Midstream LP Trimmed −9,050 −$312K 1.9%
PG Plains Gp Hldgs L P Trimmed −15,200 −$291K 2.0%
KM Kinder Morgan Inc Del Trimmed −6,400 −$176K 1.4%

Q3 2025

quarter ended September 30, 2025 · filed November 12, 2025

Company Action Shares changed Value of change % of portfolio
Transalta Corp Added +37,000 +$703K 1.3%
Tc Energy Corp Added +2,000 +$148K 5.6%
ON Oneok Inc New Trimmed −1,000 −$73K 6.2%

Q2 2025

quarter ended June 30, 2025 · filed August 06, 2025

Company Action Shares changed Value of change % of portfolio
Emera Inc New +66,500 +$4.15M 2.3%
Tc Energy Corp Added +7,830 +$508K 4.9%
Enbridge Inc Trimmed −4,108 −$248K 6.5%
Transalta Corp Added +8,000 +$118K 0.7%
Cheniere Energy Inc Added +284 +$69.2K 0.3%
PG Plains Gp Hldgs L P Added +2,130 +$41.4K 2.1%
WM Western Midstream Partners L Added +813 +$31.5K 4.9%

Q1 2025

quarter ended March 31, 2025 · filed May 15, 2025

Company Action Shares changed Value of change % of portfolio
South Bow Corp Added +6,000 +$217K 0.9%
Canadian Pacific Kansas City Added +2,000 +$202K 4.9%
CN Canadian Natl Ry Co Added +1,400 +$196K 4.1%
EP Enterprise Prods Partners L Trimmed −5,300 −$181K 10.2%
ON Oneok Inc New Trimmed −1,450 −$144K 8.5%
WC Williams Cos Inc Trimmed −1,100 −$65.7K 9.0%
Hess Midstream LP Trimmed −1,500 −$63.4K 2.4%
WM Western Midstream Partners L Trimmed −900 −$36.9K 5.1%
Mplx LP Added +500 +$26.8K 10.4%
Cheniere Energy Inc Added +100 +$23.1K 0.3%

Showing the 10 largest of 12 changes.

Q4 2024

quarter ended December 31, 2024 · filed February 06, 2025

Company Action Shares changed Value of change % of portfolio
South Bow Corp New +40,497 +$1.35M 0.8%
Canadian Pacific Kansas City Added +2,000 +$208K 5.2%
ET Energy Transfer L P Trimmed −6,900 −$135K 9.9%
Mplx LP Trimmed −2,800 −$134K 9.7%
EP Enterprise Prods Partners L Trimmed −4,100 −$129K 9.9%
Pembina Pipeline Corp Added +2,000 +$103K 5.8%

Q3 2024

quarter ended September 30, 2024 · filed October 31, 2024

Company Action Shares changed Value of change % of portfolio
EP Enterprise Prods Partners L Trimmed −15,400 −$448K 9.9%
Tc Energy Corp Added +6,000 +$377K 4.9%
Pembina Pipeline Corp Added +4,000 +$218K 6.5%
ON Oneok Inc New Added +1,200 +$109K 8.8%

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