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Entergy Mississippi
Entergy Mississippi traces its corporate lineage to the 1923 founding of Mississippi Power and Light, which became the operating company Halsey Stuart and...
Entergy Mississippi
Entergy Mississippi traces its corporate lineage to the 1923 founding of Mississippi Power and Light, which became the operating company Halsey Stuart and the Electric Bond and Share Company assembled before the Public Utility Holding Company Act of 1935 forced its breakup. In 1989, Middle South Utilities — the holding company that emerged from that restructuring — renamed itself Entergy Corp, and the Mississippi operating subsidiary took its current form as a fully regulated distribution and transmission utility. Haley Fisackerly has led the company as president and CEO since 2012, managing an asset base of substations, poles, wires, and service territories stretching from the Delta to the Jackson metro. The firm owns and operates approximately 1,100 circuit miles of transmission lines and 19,000 circuit miles of distribution lines supplying 45 counties. Its generation mix is shaped by contracts with Entergy Arkansas and other affiliates, with company-owned peaking and legacy gas-fired units supplemented by a growing procurement of utility-scale solar through build-transfer agreements. Headquarters makes rate-of-return decisions at the Mississippi Public Service Commission, where the regulatory compact determines the company's authorized equity structure and cost recovery mechanisms. Residential, commercial, and industrial load is concentrated in manufacturing-heavy regions — automotive assembly, steel, and petrochemical customers represent a disproportionate share of demand. In May 2024, the company filed its annual formula rate plan update with the Mississippi Public Service Commission, seeking to recover prudently incurred transmission and distribution investments made during the prior rate year (per the firm's regulatory filings, May 2024). The filing includes grid-hardening expenditures and a rider for the first tranche of the Green Future Solar program, a build-own-transfer renewable procurement approved in 2023 that adds 500 megawatts of solar capacity to the Mississippi portfolio. Fisackerly's team — headquartered in Jackson — allocates capital through a rate-regulated structure that separates Entergy Mississippi from Entergy's competitive-generation and nuclear-operations affiliates under the system agreement. Unlike Entergy's merchant-generation or unregulated-service subsidiaries, Entergy Mississippi operates under a structurally distinct regulatory compact: the Mississippi Public Utilities Act binds its allowed return on equity to periodic prudence reviews by the state commission. This makes the firm's capital allocation cycle a function of the rate-case calendar rather than market-timing discretion. The federal Energy Policy Act of 2005 opened the possibility of competitive-transmission development, but Entergy Mississippi remains an incumbent transmission owner in the Midcontinent Independent System Operator, where its grid spend must satisfy both state and FERC cost recovery standards.
General information
Firm type
Asset Manager
Year founded
1923
AUM
Undisclosed
Location
Region
North America
Country
United States
City
Jackson
Corporate office
Jackson, MS, United States
Principals
Haley Fisackerly
President and CEO
Sector focus
Frequently asked questions
Who runs investment decisions at Entergy Mississippi?
President and CEO Haley Fisackerly leads capital allocation, subject to the rate-review authority of the Mississippi Public Service Commission. The commission sets the authorized return on equity and must approve major grid investments, transmission projects, and generation-procurement contracts. The CFO and regulatory team prepare the annual formula rate plan filing that governs the revenue requirement.
How does Entergy Mississippi relate to Entergy Corporation?
Entergy Mississippi is a fully regulated operating subsidiary of Entergy Corp, a publicly traded utility holding company (NYSE: ETR). It operates under a separate regulatory compact with the Mississippi Public Service Commission and does not participate in Entergy's competitive-generation or nuclear-operations businesses. The system agreement coordinates resource sharing among Entergy's regulated operating companies in Arkansas, Louisiana, Mississippi, and Texas.
What is Entergy Mississippi’s generation mix and how is it procured?
The company relies on a combination of legacy company-owned gas-fired peaking units, affiliate contracts with Entergy Arkansas and other operating companies, and a growing portfolio of utility-scale solar procured through build-transfer agreements. In 2023 the Mississippi Public Service Commission approved the Green Future Solar program, which adds 500 megawatts of solar capacity across multiple sites. All generation resource decisions are reviewed for least-cost compliance and prudence by the state commission.
Is Entergy Mississippi structured as a family office, pension fund, or alternative asset manager?
No. Entergy Mississippi is a rate-regulated electric utility and a wholly owned subsidiary of Entergy Corporation, a publicly traded holding company. It is not an investment manager, family office, or private-capital vehicle. Altss profiles it because institutional allocators and infrastructure investors track the regulated-utility sector for income-oriented infrastructure exposure.
Does Entergy Mississippi participate in co-investments alongside external infrastructure funds?
No. As a regulated utility, Entergy Mississippi does not co-invest alongside private infrastructure funds, GPs, or institutional limited partners. Its capital structure is governed by the rate-making formula administered by the Mississippi Public Service Commission, and its financing is conducted through corporate debt issuance, retained earnings, and equity contributions from its parent company.
What regulatory body oversees Entergy Mississippi’s rates and capital spending?
The Mississippi Public Service Commission regulates the company’s rates, service quality, and return on equity under the Mississippi Public Utilities Act. The company files formula rate plans annually, which the commission reviews for prudence. The Federal Energy Regulatory Commission holds jurisdiction over Entergy Mississippi’s transmission rates and participation in the Midcontinent Independent System Operator.
What industrial load drives Entergy Mississippi’s demand profile?
The company serves a manufacturing-heavy load base concentrated in automotive assembly, steel, petrochemicals, and paper products. Industrial customers represent a disproportionate share of total revenue compared to the typical US electric utility, making Entergy Mississippi’s financial performance sensitive to regional industrial production cycles and the economic health of Mississippi's manufacturing corridor.
Profile maintained by Altss using OSINT (open-source intelligence), regulatory filings, licensed data partners, and verified direct submissions. Read the methodology. Last updated: . Continuous refresh with full update cycles at least every 30 days.
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