Exhibit 99.1 Public Service Enterprise Group FIRST QUARTER 2025 NYSE: PEG Financial Results Presentation April 30, 2025

PSEG First Quarter 2025 Forward-Looking Statements Certain of the matters discussed in this report about our and our subsidiaries’ future performance, • fluctuations in, or third-party default risk in wholesale power and natural gas markets, including the potential impacts on the economic viability of our generation units; including, without limitation, future revenues, earnings, strategies, prospects, consequences, and • our ability to obtain adequate nuclear fuel supply; all other statements that are not purely historical constitute “forward-looking statements” within • changes in technology related to energy generation, distribution and consumption and the meaning of the Private Securities Litigation Reform Act of 1995. Such forward-looking changes in customer usage patterns; statements are subject to risks and uncertainties, which could cause actual results to differ • third-party credit risk relating to our sale of nuclear generation output and purchase of nuclear fuel; materially from those anticipated. Such statements are based on management’s beliefs as well as • any inability to meet our commitments under forward sale obligations and Regional assumptions made by and information currently available to management. When used herein, the Transmission Organization rules; words “anticipate,” “intend,” “estimate,” “believe,” “expect,” “plan,” “should,” “hypothetical,” • the impact of changes in state and federal legislation and regulations on our business, “potential,” “forecast,” “project,” variations of such words and similar expressions are intended to including PSE&G’s ability to recover costs and earn returns on authorized investments; • PSE&G’s proposed investment projects or programs may not be fully approved by identify forward-looking statements. Factors that may cause actual results to differ are often regulators and its capital investment may be lower than planned; presented with the forward-looking statements themselves. Other factors that could cause actual • our ability to receive sufficient financial support for our New Jersey nuclear plants from results to differ materially from those contemplated in any forward-looking statements made by us the markets, production tax credit and/or zero emission certificates program; herein are discussed in filings we make with the United States Securities and Exchange • adverse changes in and non-compliance with energy industry laws, policies, regulations and standards, including market structures and transmission planning and transmission Commission (SEC), including our Annual Report on Form 10-K and subsequent reports on Form returns; 10-Q and Form 8-K. These factors include, but are not limited to: • risks associated with our ownership and operation of nuclear facilities and third-party • any inability to successfully develop, obtain regulatory approval for, or construct operation of co-owned nuclear facilities, including increased nuclear fuel storage costs, transmission and distribution, and our nuclear generation projects; regulatory risks, such as compliance with the Atomic Energy Act and trade control, • the physical, financial and transition risks related to climate change, including risks relating environmental and other regulations, as well as operational, financial, environmental and to potentially increased legislative and regulatory burdens, changing customer preferences health and safety risks; and lawsuits; • changes in federal, state and local environmental laws and regulations and enforcement; • any equipment failures, accidents, critical operating technology or business system • delays in receipt of, or an inability to receive, necessary licenses and permits and siting failures, natural disasters, severe weather events, acts of war, terrorism or other acts of approvals; and violence, sabotage, physical attacks or security breaches, cyberattacks or other incidents • changes in tax laws and regulations. that may impact our ability to provide safe and reliable service to our customers; • any inability to recover the carrying amount of our long-lived assets; All of the forward-looking statements made in this report are qualified by these cautionary • disruptions or cost increases in our supply chain, including labor shortages; statements and we cannot assure you that the results or developments anticipated by • any inability to maintain sufficient liquidity or access sufficient capital on commercially management will be realized or even if realized, will have the expected consequences to, or reasonable terms; • the impact of cybersecurity attacks or intrusions or other disruptions to our information effects on, us or our business, prospects, financial condition, results of operations or cash flows. technology, operational or other systems; Readers are cautioned not to place undue reliance on these forward-looking statements in • an increasing demand for power and load growth, potentially compounded by a shift away making any investment decision. Forward-looking statements made in this report apply only as from natural gas toward increased electrification; of the date of this report. While we may elect to update forward-looking statements from time to • failure to attract and retain a qualified workforce; • increases in the costs of equipment, materials, fuel, services and labor; time, we specifically disclaim any obligation to do so, even in light of new information or future • the impact of our covenants in our debt instruments and credit agreements on our events, unless otherwise required by applicable securities laws. business; • adverse performance of our defined benefit plan trust funds and Nuclear Decommissioning The forward-looking statements contained in this report are intended to qualify for the safe Trust Fund and increases in funding requirements; harbor provisions of Section 27A of the Securities Act of 1933, as amended, and Section 21E of • any inability to enter into or extend certain significant contracts; the Securities Exchange Act of 1934, as amended. • development, adoption and use of Artificial Intelligence by us and our third-party vendors; 2 2

PSEG First Quarter 2025 GAAP Disclaimer PSEG presents Operating Earnings in addition to its Net Income Net Income, which is an indicator of financial performance reported in accordance with accounting principles generally determined in accordance with GAAP. In addition, non-GAAP accepted in the United States (GAAP). Operating Earnings is a Operating Earnings as presented in this report may not be non-GAAP financial measure that differs from Net Income. Non- comparable to similarly titled measures used by other GAAP Operating Earnings exclude the impact of gains (losses) companies. associated with the Nuclear Decommissioning Trust (NDT), Due to the forward-looking nature of non-GAAP Operating Mark-to-Market (MTM) accounting and other material infrequent Earnings guidance, PSEG is unable to reconcile this non-GAAP items. The last two slides in this presentation (Slides A and B) financial measure to the most directly comparable GAAP include a list of items excluded from Net Income to reconcile to financial measure because comparable GAAP measures are not non-GAAP Operating Earnings with a reference to those slides reasonably accessible or reliable due to the inherent difficulty in included on each of the slides where the non-GAAP information forecasting and quantifying measures that would be required for appears. such reconciliation. Namely, we are not able to reliably project Management uses non-GAAP Operating Earnings in its internal without unreasonable effort MTM and NDT gains (losses), for analysis, and in communications with investors and analysts, as future periods due to market volatility. These items are a consistent measure for comparing PSEG’s financial uncertain, depend on various factors, and may have a material performance to previous financial results. The presentation of impact on our future GAAP results. non-GAAP Operating Earnings is intended to complement, and should not be considered an alternative to, the presentation of From time to time, PSEG and PSE&G release important information via postings on their corporate Investor Relations website at https://investor.pseg.com. Investors and other interested parties are encouraged to visit the Investor Relations website to review new postings. You can sign up for automatic email alerts regarding new postings at the bottom of the webpage at https://investor.pseg.com or by navigating to the Email Alerts webpage here. The information on https://investor.pseg.com and https://investor.pseg.com/resources/email-alerts/default.aspx is not incorporated herein and is not part of this communication or the Form 8-K to which it is an exhibit. 3 3

PSEG First Quarter 2025 PSEG Q1 2025 Highlights First Quarter Results • Net Income of $1.18 per share in Q1 2025 • Non-GAAP Operating Earnings of $1.43 per share in Q1 2025 • First quarter dividend increased by 5% to annualized indicative rate of $2.52 per share for 2025 Operational Excellence • PSE&G service territory withstood multiple cold spells in January and February, representing the highest winter peak load for both electric and gas in the last six years, and maintained high levels of reliability and efficient customer response times • PSE&G named one of the “Easiest to do Business With” in the 2025 Cogent Syndicated Utility Trusted Brand & Customer Engagement : Residential study by Escalent • PSEG Nuclear achieved a capacity factor of 99.9% for the quarter Disciplined Investment • PSE&G invested ~$0.8 billion in Q1; full-year capital spending plan of ~$3.8 billion is on track and on budget • PSE&G began investment in its Clean Energy Future - Energy Efficiency II Program (CEF-EE II), representing ~$2.9 billion in approved spending over a six-year period See Slides A and B for Items excluded from Net Income to reconcile to Operating Earnings (non-GAAP) for PSEG and PSEG Power & Other. All future decisions and declarations regarding dividends on the common stock are subject to approval by the Board of Directors. 4 4 Note: PSEG Power & Other includes nuclear generating fleet, gas supply operations, PSEG Long Island, competitively bid regulated transmission investments, Parent and other.

PSEG First Quarter 2025 PSEG Outlook Maintained • PSEG maintained 2025 non-GAAP Operating Earnings guidance of $3.94 - $4.06 per share, representing ~9% increase at the midpoint over 2024 results $3.94 - $4.06 • Key drivers and assumptions for 2025 include: + New distribution base rates effective for the full year + Clause-based investment recoveries for infrastructure modernization and EE + Higher PSE&G rate base, increased by ~12% at YE 2024 over YE 2023 $3.68 + Higher PTC threshold price estimated at $44.75/MWh for 2025 -- ZEC II award payments end May 2025 -- Hope Creek refueling scheduled for fall 2025 includes fuel cycle extension work -- Higher costs, including interest and depreciation • Regulated capital spending plan of ~$3.8 billion for 2025 focused on continued investments in infrastructure modernization, energy efficiency and load growth • Increased indicative 2025 annual common dividend by 5% to $2.52 per share 2024 Non-GAAP 2025E Non-GAAP Operating Earnings Operating Earnings Guidance 5 5 All future decisions and declarations regarding dividends on the common stock are subject to approval by the Board of Directors.

PSEG First Quarter 2025 PSEG: Strong Business Mix and Predictable Growth Non-GAAP Operating Earnings • PSEG’s long-term non-GAAP earnings growth outlook of 5%-7% is based on the midpoint of 2025 guidance range (a 9% higher baseline) • ~90% of PSEG’s projected non-GAAP Operating Earnings over the 2025-2029 period are from PSE&G • Total PSEG capital program of $22.5B - $26B for 2025-2029 with >90% from regulated activities • $21B - $24B regulated capital investment program for 2025-2029, supports PSE&G’s Rate Base CAGR of 6%-7.5% over the same period • Solid balance sheet supports execution of robust 5-year capital plan without the need to issue equity or sell assets • Outlook assumes PTC threshold price, adjusted annually for inflation • Growth beyond forecasted CAGR range could be achieved through opportunities to contract existing nuclear output under longer-term contracts at prices above the nuclear PTC threshold 2025E 2029E 6

PSEG First Quarter 2025 Q1 2025 Review 7

PSEG First Quarter 2025 PSEG Q1 Results PSEG Summary – Three Months ended March 31, Net Income 2025 2024 Change PSE&G $546 $488 $58 PSEG Power & Other $43 $44 $(1) Total PSEG $589 $532 $57 Non-GAAP Operating Earnings 2025 2024 Change PSE&G $546 $488 $58 PSEG Power & Other $172 $169 $3 Total PSEG $718 $657 $61 8 8 See Slides A and B for Items excluded from Net Income to reconcile to Operating Earnings (non-GAAP) for PSEG and PSEG Power & Other.

PSEG First Quarter 2025 PSEG EPS Reconciliation – Q1 2025 versus Q1 2024 $1.75 $1.43 $1.50 $0.01 $0.11 $1.31 Gross Margin 0.02 O&M (0.03) Transmission (0.01) $1.25 $1.18 Depreciation & Interest Distribution: $1.06 (0.02) Margin 0.20 Taxes & Other 0.04 $1.00 O&M (0.05) Depreciation & Interest (0.03) $0.75 $0.50 $0.25 $0.00 Q1 2024 Q1 2024 PSE&G PSEG Power & Other Q1 2025 Q1 2025 Net Income Operating Earnings Operating Earnings Net Income (non-GAAP) (non-GAAP) See Slides A and B for Items excluded from Net Income to reconcile to Operating Earnings (non-GAAP) for PSEG and PSEG Power & Other. 9 9 Results may not add due to rounding. $ / share

PSEG First Quarter 2025 PSE&G Q1 2025 Highlights Operations Regulatory and Market Environment • Residential Electric and Gas customer count, a driver of margin growth • Filed request for annual revenue increase of $53 million for investments under the Conservation Incentive Program (CIP), each grew by ~1% under GSMP II Extension for the trailing 12 months ended March 31, 2025 • In April, BPU approved annual revenue increase of ~$9 million for • CIP minimizes margin volatility due to variations in sales, regardless of the investments under IAP effective May 1, 2025 sales driver (weather, energy efficiency, net-metered solar, economy) • Implemented annual FERC transmission formula rate resulting in $64 million • Weather-normalized sales for the trailing 12 months ended March 31: in additional revenue effective January 1, 2025, subject to true-up - Electric sales increased by 2% Financial - Gas sales decreased by 2% • PSE&G invested ~$0.8 billion in Q1; regulated capital investment program • PSE&G replaced in Q1 2025 ~48 miles of gas main and ~5,080 associated of ~$3.8 billion for 2025 on track and on budget gas services to homes and businesses under gas main replacement program • Commenced ~$2.9 billion CEF-EE II Program in Q1 2025, covering - Reduced reported methane emissions by over 30% system wide commitments from January 2025 to June 2027 to be spent over a since 2018 through GSMP six-year period • PSE&G large load inquires for new service connections increased to more than 6,400 megawatts as of March 31, 2025 • In March, PSE&G issued $400 million of 5.05% Secured Medium-Term Notes due March 2035 and $500 million of 5.50% Secured Medium-Term Notes due March 2055 10

PSEG First Quarter 2025 PSEG Power & Other Other Financial Considerations Nuclear Generation Measures • For 2025, total nuclear generation is forecasted to be 30-32 TWh Three Months Ended Three Months Ended March 31, 2025 March 31, 2024 • Realized energy price historically aligned with the PECO hub Capacity Factor 99.9% 96.8% • Hope Creek to transition from 18-month to 24-month fuel cycles following fall 2025 refueling Fuel Cost ($ millions) $53 $51 • In March, PSEG issued $600 million of 4.90% Senior Notes due Generation (GWh) 8,355 8,201 March 2030 and $400 million of 5.40% Senior Notes due March 2035 Fuel Cost ($/MWh) $6.34 $6.22 Spring 2025 – S1 Spring 2024 – HC Refueling Outages Fall 2025 – HC, PB3 Fall 2024 – S2, PB2 PJM Capacity Auction Results Illustrative Gross Margin Change Above PTC Delivery Period PSEG’s Average Prices PSEG’s Cleared Capacity Output $10/MWh $25/MWh $50/MWh June 2024 – May 2025 $61/MW-Day 3,700 MW 10 TWh $100M $250M $500M 20 TWh $200M $500M $1,000M June 2025 – May 2026 $270/MW-Day 3,500 MW 30 TWh $300M $750M $1,500M PJM capacity auction for June 2026 – May 2027 scheduled for July 2025 Note: Generation indicates net generation. Average Prices and Cleared Capacity reflect base and incremental auctions. 11 11 PJM’s new conversion of ICAP (installed capacity) to UCAP (unforced capacity, which is what is bid), has resulted in less UCAP per MW of ICAP. PSEG Nuclear sold the full UCAP value of the units.

PSEG First Quarter 2025 Appendix 12

PSEG First Quarter 2025 PSEG Maintains a Solid Financial Position PSEG Public Service Electric & Gas PSEG Senior Unsecured Credit Ratings PSE&G Senior Secured Credit Ratings Moody’s = Baa2 / Outlook = Stable S&P = BBB / Outlook = Stable Moody’s = A1 / Outlook = Stable S&P = A / Outlook = Stable PSEG Long-term Debt Outstanding $5.86B PSE&G Long-term Debt Outstanding $15.89B PSEG Consolidated Debt to Capitalization 59% PSEG Maturity Profile 2025 - 2029 PSEG Power Issuer Credit Ratings Moody’s = Baa2 / Outlook = Stable S&P = BBB / Outlook = Stable 2,500 (1,2) PSEG Power 364-Day Term Loan Outstanding $0.40B 2,000 1,500 (2) PSEG Power Long-term Debt Outstanding $1.25B 1,000 500 PSEG Liquidity PSEG Liquidity and Net Cash Collateral Postings 0 • PSEG had approximately $4.6B of total available liquidity, including $894M 2025 2026 2027 2028 2029 of cash and cash equivalents, at March 31, 2025 • As of March 31, 2025, PSEG’s variable rate debt was ~7% of total debt PSE&G PSEG Power PSEG • PSEG Power had net cash collateral postings of $333M at March 31, 2025 All data is as of 3/31/2025 unless otherwise noted. (1) 364-Day Term Loan is included in Short-Term Debt as Commercial Paper & Loans. (2) PSEG Power 364-Day term loan and PSEG Power long-term debt are at a variable rate. In December 2024, PSEG Power amended its existing $1.25 billion variable rate 3-year term loan agreement to extend from March 2025 through June 2025. 13 13 Note: Total long-term debt outstanding amounts may not add to PSEG Consolidated total long-term debt outstanding due to rounding. Amounts on slide are rounded up to two decimal places. Principal Maturing ($ Millions)

PSEG First Quarter 2025 PSEG Liquidity as of March 31, 2025 Expiration Total Available Company Facility Usage Date Facility Liquidity ($ millions) PSE&G Revolving Credit Facility March 2029 $1,000 $25 $975 PSEG Money Pool (A,B) PSEG/PSEG Power Revolving Credit Facility (PSEG) March 2029 $1,500 $14 $1,486 (A) Revolving Credit Facility (PSEG Power) March 2029 1,250 37 1,213 (C) Letter of Credit Facility (PSEG Power) April 2026 75 45 30 $2,825 $96 $2,729 Total Facilities $3,825 $121 $3,704 PSEG Money Pool Cash and Short-term Investments $335 PSE&G Cash and Short-term Investments $559 Total Liquidity Available $4,598 Total Money Pool Liquidity Available $3,064 (A) Master Facility of $2.75B with a PSEG sub-limit of $1.5B and PSEG Power sub-limit of $1.25B, which can be adjusted subject to terms within the credit agreement. (B) The PSEG sub-limit includes a sustainability linked pricing-based mechanism with potential increases or decreases, which are not expected to be material, depending on performance relative to targeted methane emission reductions. 14 14 (C) PSEG Power has $200 million in uncommitted credit facilities with $112 million in letters of credit outstanding under these facilities.

PSEG First Quarter 2025 Glossary of Terms AFUDC Allowance For Funds Used During Construction GSMP Gas System Modernization Program PSEG Investor Relations 80 Park Plaza HC Hope Creek AMI Automated Metering Infrastructure Newark NJ 07102 IAP Infrastructure Advancement Program BGSS Basic Gas Supply Service [email protected] ICAP Installed Capacity BPU New Jersey Board of Public Utilities M&R Metering and Regulating CAGR Compound Annual Growth Rate Link to PSEG Investor Relations Website MSCI Morgan Stanley Capital International CEF Clean Energy Future O&M Operation & Maintenance CIP Conservation Incentive Program OPEB Other Postretirement Benefits CWIP Construction Work In Progress Link to PSEG ESG Webpages PB Peach Bottom E Estimate PECO PECO Energy Company EC Energy Cloud PJM Pennsylvania New Jersey Maryland EE Energy Efficiency The information on the PSEG Investor PPA Power Purchase Agreement EPS Earnings Per Share Relations Website and the PSEG ESG PTC Production Tax Credit ESG Environmental, Social and Governance Webpages is not incorporated herein and is ROE Return on Equity EV Electric Vehicle not part of this slide presentation or the Form S Salem FERC Federal Energy Regulatory Commission 8-K to which it is an exhibit. UCAP Unforced Capacity FY Full Year YE Year End GAAP Generally Accepted Accounting Principles ZECs Zero Emission Certificates GHG Greenhouse Gas 15 15

PSEG First Quarter 2025 Reconciliation of Non-GAAP Operating Earnings Public Service Enterprise Group Incorporated - Consolidated Operating Earnings (non-GAAP) Reconciliation Three Months Ended (a) Includes the financial impact from positions with forward delivery months. March 31, Reconciling Items (b) Income tax effect calculated at the statutory rate 2025 2024 except for qualified NDT related activity, which ($ millions, Unaudited) records an additional 20% trust tax on income (loss) from qualified NDT Funds, and lease related activity. Net Income $ 589 $ 532 Please see Slide 3 for an explanation of PSEG’s use of (Gain) Loss on Nuclear Decommissioning Trust (NDT) Operating Earnings as a non-GAAP financial measure Fund Related Activity, pre-tax (12) (95) and how it differs from Net Income. (a) (Gain) Loss on Mark-to-Market (MTM), pre-tax 188 258 Lease Related Activity, pre-tax - (4) (b) Income Taxes related to Operating Earnings (non-GAAP) reconciling items (47) (34) Operating Earnings (non-GAAP) $ 718 $ 657 PSEG Fully Diluted Average Shares Outstanding (in millions) 500 500 ($ Per Share Impact - Diluted, Unaudited) Net Income $ 1.18 $ 1.06 (Gain) Loss on NDT Fund Related Activity, pre-tax (0.03) (0.19) (a) (Gain) Loss on MTM, pre-tax 0.38 0.52 Lease Related Activity, pre-tax - ( 0.01) (b) Income Taxes related to Operating Earnings (non-GAAP) reconciling items (0.10) ( 0.07) Operating Earnings (non-GAAP) $ 1.43 $ 1.31 A 16 16

PSEG First Quarter 2025 Reconciliation of Non-GAAP Operating Earnings PSEG Power & Other Operating Earnings (non-GAAP) Reconciliation (a) Includes the financial impact from positions with Three Months Ended forward delivery months. Reconciling Items March 31, (b) Income tax effect calculated at the statutory rate 2025 2024 except for qualified NDT related activity, which records an additional 20% trust tax on income ($ millions, Unaudited) (loss) from qualified NDT Funds, and lease related activity. Net Income $ 43 $ 44 Please see Slide 3 for an explanation of PSEG’s use of Operating Earnings as a non-GAAP financial measure (Gain) Loss on NDT Fund Related Activity, pre-tax (12) (95) and how it differs from Net Income. (a) (Gain) Loss on MTM, pre-tax 188 258 Lease Related Activity, pre-tax - (4) (b) Income Taxes related to Operating Earnings (non-GAAP) reconciling items (47) (34) Operating Earnings (non-GAAP) $ 172 $ 169 PSEG Fully Diluted Average Shares Outstanding (in millions) 500 500 B 17 17