The principal business and office address for each Reporting Person is 1100 Louisiana Street, 10th Floor, Houston, Texas 77002.

See Items 2(a) and 2(b) above.

During the last five years, no Reporting Person nor, to the best of their knowledge, any Listed Person has been convicted in a criminal proceeding (excluding traffic violations or similar misdemeanors).

During the last five years, no Reporting Person nor, to the best of their knowledge, any Listed Person has been a party to a civil proceeding of a judicial or administrative body of competent jurisdiction and as a result of such proceeding was or is subject to a judgment, decree or final order enjoining future violations of, or prohibiting or mandating activities subject to, federal or state securities laws or finding any violation with respect to such laws.

Each Reporting Person that is a natural person and each Listed Person is a citizen of the United States of America residing in Houston, Texas.

The subsection titled "Phantom Unit Awards to Ms. Williams" included in Item 3 of each of the Original Schedule 13D and the Duncan Trustee Schedule 13D is hereby amended and restated to read in its entirety as follows: Phantom Unit Awards to Ms. Williams As previously disclosed in the Form 4 Statement of Changes in Beneficial Ownership filed on behalf of Ms. Williams on February 21, 2017, effective as of February 16, 2017, Ms. Williams received an award (the "2017 Phantom Unit Award") of 300,000 phantom units (the "2017 Phantom Units") pursuant to the 2008 Enterprise Products Long-Term Incentive Plan (as amended and/or restated from time to time, the "2008 Plan"). As previously disclosed in the Form 4 Statement of Changes in Beneficial Ownership filed on behalf of Ms. Williams on February 18, 2021, (i) the 2017 Phantom Units vested on February 16, 2021 and expired upon vesting and settlement thereof in exchange for an equal number of Common Units and (ii) in connection with such vesting, Ms. Williams surrendered 118,050 Common Units in satisfaction of certain tax withholding obligations. As previously disclosed in the Form 4 Statement of Changes in Beneficial Ownership filed on behalf of Ms. Williams on February 14, 2018, effective as of February 12, 2018, Ms. Williams received an award (the "2018 Phantom Unit Award") of 335,000 phantom units (the "2018 Phantom Units") pursuant to the 2008 Plan. As previously disclosed in the Form 4 Statement of Changes in Beneficial Ownership filed on behalf of Ms. Williams on February 18, 2022, (i) the 2018 Phantom Units vested on February 16, 2022 and expired upon vesting and settlement thereof in exchange for an equal number of Common Units and (ii) in connection with such vesting, Ms. Williams surrendered 131,823 Common Units in satisfaction of certain tax withholding obligations. As previously disclosed in the Form 4 Statement of Changes in Beneficial Ownership filed on behalf of Ms. Williams on February 13, 2019, effective as of February 11, 2019, Ms. Williams received an award (the "2019 Phantom Unit Award") of 370,000 phantom units (the "2019 Phantom Units") pursuant to the 2008 Plan. As previously disclosed in the Form 4 Statement of Changes in Beneficial Ownership filed on behalf of Ms. Williams on February 21, 2023, (i) the 2019 Phantom Units vested on February 16, 2023 and expired upon vesting and settlement thereof in exchange for an equal number of Common Units and (ii) in connection with such vesting, Ms. Williams surrendered 145,595 Common Units in satisfaction of certain tax withholding obligations. As previously disclosed in the Form 4 Statement of Changes in Beneficial Ownership filed on behalf of Ms. Williams on February 10, 2020, effective as of February 6, 2020, Ms. Williams received an award (the "2020 Phantom Unit Award") of 400,000 phantom units (the "2020 Phantom Units") pursuant to the 2008 Plan. As previously disclosed in the Form 4 Statement of Changes in Beneficial Ownership filed on behalf of Ms. Williams on February 21, 2024, (i) the 2020 Phantom Units vested on February 16, 2024 and expired upon vesting and settlement thereof in exchange for an equal number of Common Units and (ii) in connection with such vesting, Ms. Williams surrendered 157,400 Common Units in satisfaction of certain tax withholding obligations. As previously disclosed in the Form 4 Statement of Changes in Beneficial Ownership filed on behalf of Ms. Williams on February 8, 2021, effective as of February 4, 2021, Ms. Williams received an award (the "2021 Phantom Unit Award") of 450,000 phantom units (the "2021 Phantom Units") pursuant to the 2008 Plan. As previously disclosed in the Form 4 Statement of Changes in Beneficial Ownership filed on behalf of Ms. Williams on February 19, 2025, (i) the 2021 Phantom Units vested on February 16, 2025 and expired upon vesting and settlement thereof in exchange for an equal number of Common Units and (ii) in connection with such vesting, Ms. Williams surrendered 177,075 Common Units in satisfaction of certain tax withholding obligations. As previously disclosed in the Form 4 Statement of Changes in Beneficial Ownership filed on behalf of Ms. Williams on February 9, 2022, effective as of February 8, 2022, Ms. Williams received an award (the "2022 Phantom Unit Award") of 482,000 phantom units (the "2022 Phantom Units") pursuant to the 2008 Plan. As previously disclosed in the Form 4 Statement of Changes in Beneficial Ownership filed on behalf of Ms. Williams on February 18, 2026, (i) the 2022 Phantom Units vested on February 16, 2026 and expired upon vesting and settlement thereof in exchange for an equal number of Common Units and (ii) in connection with such vesting, Ms. Williams surrendered 189,667 Common Units in satisfaction of certain tax withholding obligations. As previously disclosed in the Form 4 Statement of Changes in Beneficial Ownership filed on behalf of Ms. Williams on February 9, 2023, effective as of February 9, 2023, Ms. Williams received an award (the "2023 Phantom Unit Award") of 535,000 phantom units (the "2023 Phantom Units") pursuant to the 2008 Plan. The 2023 Phantom Units vest on February 16, 2027 and will expire upon vesting and settlement thereof in exchange for an equal number of Common Units. As previously disclosed in the Form 4 Statement of Changes in Beneficial Ownership filed on behalf of Ms. Williams on February 8, 2024, effective as of February 8, 2024, Ms. Williams received an award (the "2024 Phantom Unit Award") of 550,000 phantom units (the "2024 Phantom Units") pursuant to the 2008 Plan. The 2024 Phantom Units vest on February 16, 2028 and will expire upon vesting and settlement thereof in exchange for an equal number of Common Units. As previously disclosed in the Form 4 Statement of Changes in Beneficial Ownership filed on behalf of Ms. Williams on February 10, 2025, effective as of February 10, 2025, Ms. Williams received an award (the "2025 Phantom Unit Award") of 475,000 phantom units (the "2025 Phantom Units") pursuant to the 2008 Plan. The 2025 Phantom Units vest on February 16, 2029 and will expire upon vesting and settlement thereof in exchange for an equal number of Common Units. As previously disclosed in the Form 4 Statement of Changes in Beneficial Ownership filed on behalf of Ms. Williams on February 10, 2026, effective as of February 10, 2026, Ms. Williams received an award (the "2026 Phantom Unit Award" and together with the 2017 Phantom Unit Award, the 2018 Phantom Unit Award, the 2019 Phantom Unit Award, the 2020 Phantom Unit Award, the 2021 Phantom Unit Award, the 2022 Phantom Unit Award, the 2023 Phantom Unit Award, the 2024 Phantom Unit Award and the 2025 Phantom Unit Award, the "Phantom Unit Awards") of 500,000 phantom units (the "2026 Phantom Units") pursuant to the 2008 Plan. The 2026 Phantom Units vest on February 16, 2030 and will expire upon vesting and settlement thereof in exchange for an equal number of Common Units. The subsection titled "DRIP Unit Purchases" included in Item 3 of each of the Original Schedule 13D and the Duncan Trustee Schedule 13D is hereby amended to add the following paragraphs: Between May 2025 and August 2026, affiliates of Ms. Williams' spouse, namely Alkek and Williams, Ltd. ("Alkek") and Chaswil, Ltd. ("Chaswil"), acquired aggregates of 59,762 and 9,946 Common Units, respectively, pursuant to the DRIP at prices of between $31.95 and $39.19 per Common Unit. The source of the funds used for each of these purchases (collectively, the "2025-2026 DRIP Unit Purchases") was the quarterly cash distributions paid by the Issuer to Alkek or Chaswil (as applicable) with respect to the Common Units held by such Common Unit holder. The fifth paragraph of the subsection titled "Preferred Unit Transactions" included in Item 3 of each of the Original Schedule 13D and the Duncan Trustee Schedule 13D is hereby amended and restated in its entirety as follows: As previously disclosed in the October 2020 Form 4, effective as of September 30, 2020, EPCO Holdings entered into a contingent preferred unit purchase agreement with holders of the Preferred Units (the "Contingent Purchase Agreement"), pursuant to which EPCO Holdings agreed to purchase from each such holder all (or a portion of at least $10 million) of such holder's Preferred Units either (i) for cash at a purchase price of $1,000 per unit (plus accrued and unpaid distributions) upon such holder's election after September 30, 2025 or upon the Issuer's dissolution or liquidation or (ii) for a cash purchase price of $1,010 per unit (plus accrued and unpaid distributions) upon such holder's election prior thereto solely in connection with certain change of control or investment grade rating events (the "Contingent Purchase Obligation"). In accordance with the terms and provisions of the Contingent Purchase Agreement, the Contingent Purchase Obligation expired (without having been exercised) effective as of September 30, 2026 (representing the outside expiration date of the Contingent Purchase Obligation previously disclosed in the October 2020 Form 4).

Item 4 of each of the Original Schedule 13D and the Duncan Trustee Schedule 13D is hereby amended to add the paragraphs below: The information set forth under Item 3 is incorporated into this Item 4 by reference. The purpose of the Phantom Unit Awards is to promote the interests of EPCO, the Issuer, and EPD GP by providing Ms. Williams (as a key EPCO employee) with incentive compensation awards to encourage superior performance. The purpose of the 2025-2026 DRIP Unit Purchases by Alkek and Chaswil is to hold the purchased securities for investment purposes. Other than described above, none of the Reporting Persons has any plans or proposals of the type referred to in clauses (a) through (j) of Item 4 of Schedule 13D, although they reserve the right to formulate such plans or proposals in the future.

Item 5(a) of each of the Original Schedule 13D and the Duncan Trustee Schedule 13D is hereby amended and restated in its entirety as follows: As set forth herein, Randa Duncan Williams may be deemed to have beneficial ownership of an aggregate of 702,584,914 Common Units, representing approximately 32.6% of the outstanding Common Units, including Common Units deemed beneficially owned through her indirect influence as one of three voting trustees controlling EPCO. Ms. Williams has sole voting and dispositive power over the 1,417,390 Common Units that she holds directly and has shared voting and dispositive power over another 701,167,524 Common Units, consisting of (i) the 679,303,707 Common Units beneficially owned by EPCO, by virtue of her status as one of the EPCO Trustees, (ii) 7,023,499 Common Units owned directly by family trusts of which Ms. Williams and/or members of Ms. Williams' immediate family are named beneficiaries, (iii) 14,046,999 Common Units owned directly by additional family trusts for which Ms. Williams serves as a director of an entity trustee, (iv) 668,877 Common Units owned directly by Alkek, (v) 9,090 Common Units owned by Ms. Williams' spouse, (vi) 4,040 Common Units held jointly by Ms. Williams and her spouse and (vii) 111,313 Common Units owned directly by Chaswil. Ms. Williams disclaims beneficial ownership of the Common Units beneficially owned by the EPCO Trustees, the family trusts, Alkek and Chaswil, as described above, except to the extent of her voting and dispositive interests in such Common Units. As set forth herein, the EPCO Trustees have shared voting and dispositive power over the 679,303,707 Common Units beneficially owned by EPCO, representing approximately 31.5% of the outstanding Common Units. The Common Units beneficially owned by EPCO include: (i) 74,754,703 Common Units owned directly by EPCO and (ii) 604,549,004 Common Units owned directly by EPCO Holdings. EPCO Holdings is a wholly owned subsidiary of EPCO. Except as set forth in the EPCO Trust Agreement, voting with respect to Class A Common Stock by the EPCO Trustees is by majority vote. DD LLC directly owns 100% of the membership interests in EPD GP. EPCO Holdings holds directly 604,549,004 Common Units. As set forth herein, EPCO Holdings has shared voting and dispositive power over the 604,549,004 Common Units owned directly by it. As set forth herein, EPCO directly owns 74,754,703 Common Units and has shared voting and dispositive power over the 604,549,004 Common Units owned directly by EPCO Holdings. EPCO Holdings is a wholly owned subsidiary of EPCO. The aforementioned ownership amounts of Common Units by the Reporting Persons are as of September 30, 2026, our most recent practicable date for this filing on Schedule 13D. The percentage ownership amounts are based on the 2,156,604,858 Common Units outstanding as of September 30, 2026 based on information provided by the Issuer.

See Item 5(a) above.

Except as otherwise set forth herein or below, none of the Reporting Persons has effected any transactions in Common Units in the past 60 days.

No person other than as set forth in the response to this Item 5 has the right to receive or the power to direct the receipt of distributions or dividends from, or the proceeds from the transfer of, the Common Units beneficially owned by the Reporting Persons.

Not applicable.

The subsection titled "Letters of Credit and Pledge of Common Units by EPCO Holdings to Support Contingent Purchase Obligation" included in Item 6 of each of the Original Schedule 13D and the Duncan Trustee Schedule 13D is hereby amended and restated in its entirety as follows: Letters of Credit and Pledge of Common Units by EPCO Holdings to Support Contingent Purchase Obligation On September 30, 2020, EPCO Holdings delivered letters of credit to certain holders of Preferred Units in support of the Contingent Purchase Obligation. EPCO Holdings pledged an aggregate of 9,100,000 Common Units to secure its reimbursement obligations with respect to such letters of credit. In accordance with the terms and provisions of such letters of credit, the related pledge agreement and the Contingent Purchase Agreement, all of the letters of credit and the related pledge of Common Units described above expired (without having been exercised) effective as of September 30, 2026.

Item 7 of each of the Original Schedule 13D and the Duncan Trustee Schedule 13D is hereby amended and restated in its entirety as follows: 99.1 Seventh Amended and Restated Agreement of Limited Partnership of Enterprise Products Partners L.P., dated effective as of September 30, 2020 (incorporated by reference to Exhibit 3.1 to the Form 8-K filed by the Issuer on October 1, 2020). 99.2 Eighth Amended and Restated Administrative Services Agreement, dated as of February 13, 2015, by and among Enterprise Products Company, EPCO Holdings, Inc., Enterprise Products Holdings LLC, Enterprise Products Partners L.P., Enterprise Products OLPGP, Inc., Enterprise Products Operating LLC, OTLP GP, LLC and Oiltanking Partners, L.P. (incorporated by reference to Exhibit 10.1 to the Form 8-K filed by the Issuer on February 13, 2015). 99.3 Fourth Amended and Restated Credit Agreement, dated as of March 31, 2023, by and among EPCO Holdings, Inc., as Borrower, the Lenders party thereto, and Citibank, N.A., as Administrative Agent (incorporated by reference to Exhibit 99.3 to the Schedule 13D/A filed by the Reporting Persons on April 14, 2023). 99.4 Fourth Amended and Restated Pledge and Security Agreement, dated as of March 31, 2023, by and between EPCO Holdings, Inc., as Pledgor, and Citibank, N.A., as Administrative Agent, as Secured Party (incorporated by reference to Exhibit 99.4 to the Schedule 13D/A filed by the Reporting Persons on April 14, 2023). 99.5 First Amendment to Fourth Amended and Restated Credit Agreement, dated as of March 28, 2025, by and among EPCO Holdings, Inc., as Borrower, the Lenders party thereto, and Citibank, N.A., as Administrative Agent (incorporated by reference to Exhibit 99.5 to the Schedule 13D/A filed by the Reporting Persons on April 1, 2025). 99.6 Joint Filing Agreement among the Reporting Persons dated March 20, 2018 (incorporated by reference to Exhibit 99.25 to the Schedule 13D/A filed by the Reporting Persons on March 20, 2018). 99.7# Appendix A. ______________ # Filed herewith.