Heronetta Management, L.P. filed a Form 13F-HR with the U.S. Securities and Exchange Commission on November 10, 2026, disclosing its equity portfolio as of September 30, 2026. The filing lists the firm's managing partner, Henry Breck, as the authorized signatory.
The report details a portfolio consisting of 15 individual equity securities. Heronetta Management holds positions in a mix of midstream energy companies and master limited partnerships (MLPs). The largest position disclosed in the filing is in Energy Transfer L.P., where the firm holds 799,229 shares. This is followed by Enterprise Products Partners L.P., with 495,048 shares, and Williams Cos. Inc., with 251,402 shares.
Other notable holdings include Western Midstream Partners L.P. with 206,361 shares, MPLX LP with 324,039 shares, and Kinder Morgan Inc. with 88,725 shares. The filing also lists positions in Antero Midstream Corp, Cheniere Energy Inc, Enbridge Inc, Hess Midstream LP, Oneok Inc, Pembina Pipeline Corp, Plains GP Holdings L.P., Targa Resources Corp, and TC Energy Corp.
All positions listed in the information table are identified as sole voting and sole dispositive power, indicating Heronetta Management's exclusive control over these assets.
