APPENDICES
INTRODUCTION
ENVIRONMENTAL
CORPORATE CITIZENSHIP
GOVERNANCE AND TRANSPARENT REPORTING
About this Report
Technology and Innovation Partners
GRI Content Index
ISSB Index
Data Tables
Forward-Looking Statements
Third-Party Verification
Third-Party Verification
Additionally, an independent review of the verification plan, activities, and conclusion was performed. The independent review assessed the appropriateness of team competencies, whether the verification plan has been designed properly, whether all verification activities have been completed, significant decisions made during the verification, whether sufficient and appropriate evidence was collected to support the verification opinion, adherence to the ISO 14064 - 3 (2019) standard, and the final verification opinion. METHODOLOGY CG completed the review in accordance with the ISO 14064 Part 3: Greenhouse Gases: Specification with guidance for the validation and verification of greenhouse gas assertions (ISO, 2019). As such, CG planned and performed our work in order to provide Limited Assurance, rather than Reasonable Assurance or Externally Checked Review, with respect to energy, water, waste and GHG assertion. A materiality level of 5% was applied. CG believes the sample selection, boundary confirmation, recalculation, and underlying data verification work provides a reasonable basis for CG’s verification conclusion. Data set Review level Date range Energy consumption Limited assurance Jan 1, 2025 – D ecember 31, 2025 Ghg emissions Limited assurance Jan 1, 2025 – D ecember 31, 2025 Water consumption Limited assurance Jan 1, 2025 – D ecember 31, 2025 Waste generation Limited assurance Jan 1, 2025 – D ecember 31, 2025 The processes for performing the Limited Assurance of the submission are described as follows: Energy Consumption Data Energy data is entered into Energy Star Portfolio Manager (ESPM) based on invoices provided directly by the utility, and where applicable, electricity consumption data for the 2025 reporting period was based on Real Time Meter data from revenue grade meters. ESRT elected to utilize a combination of RTM data from a third - party metering vendor to ensure accuracy in reporting. Natural gas, steam, and fuel oil data was calculated directly from utility invoices. Tenant submetered electricity consumption is provided directly by third - party submeter providers. All energy data u nderwent third- party checks to ensure that data reported is as accurate and complete as reasonable. Based on CG ’s Limited Assurance review, there is no evidence indicating that energy data submitted in public disclosures is not accurate and complete. GHG Emissions Data CG reviewed energy consumption data utilizing ESPM data and reported tenant sub - meter data to ensure proper allocation of fuel, district steam and base building electricity, tenant submeter and tenant direct - meter emissions across Scope 1, 2, and 3 GHG emissions in alignment with the GHG Protocol. Scope 1 emissions are classified as direct GHG emissions resulting from fuel oil and natural gas. Scope 2 emissions are classified as indirect emissions including electricity and district steam. Scope 3 emissions are classified as indirect emissions resulting from tenant direct and submetered energy consumption. Emissions factors and Global Warming Potentials were also verified. Based on CG ’s
THIRD-PARTY DATA VERIFICATION From: Justin Stephens, CG To: Dana Schneider, ESRT Date: April 21, 2026 RE: Third Party Verification – Limited Assurance SCOPE
CG Solutions (CG) has conducted an independent third-party review of ESRT’s (ESRT) 2025 GHG, energy, water and waste performance with the intention of providing Limited Assurance of the submission’s accuracy and completeness. The scope of the review includes all Scope 1, Scope 2 and Scope 3 emissions sources as well as energy, water and waste performance, as it applies to the selected reporting boundary of US operations. The objective of this Limited Assurance is to confirm data, controls, and processes supporting the energy, water, waste and greenhouse gas (GHG) emission calculations per of ESRT’s GHG assertion according to the procedures set out in ISO 14064-3 2019 and GHG Protocol. The goal is to provide Limited Assurance using an independent third-party team within CG. The scope of this verification included verification of 10 office, 3 multi-family properties within ESRT’s operational control owned in 2025 and 16 retail properties owned by ESRT in 2025 but out of operational control. The office count includes 1 property divested in 2025. The retail count includes 1 property acquired in 2025. LEVEL OF ASSURANCE Level of assurance is used to determine the depth of detail that a Verification Body designs into the Verification Plan to determine if there are material errors, omissions, or misstatements in a company's energy, water, waste and GHG assertions. Three levels of review are generally recognized – Reasonable Assurance, Limited Assurance, and Checked Review. Reasonable Assurance generates the highest level of confidence that an emissions report is materially correct (with the exception of Absolute Assurance which is generally impractical for companies to achieve). Limited Assurance provides less confidence and involves less detailed examination of energy, water, waste and GHG data and supporting documentation. Checked Review is a third-party review of data that does not comply with the definition of assurance/verification but does offer a review of data accuracy and completeness. CG ’s verification of ESRT’s energy, water, waste and GHG Emissions for calendar year 2025 was conducted to provide Limited Assurance. This statement should not be relied upon to detect all errors, omissions, or misstatements that may exist. ROLES AND RESPONSIBILITIES CG assigned an independent internal team to perform Limited Assurance in accordance with the ISO 14064-3 2019 International Standard. The internal team performing this review has not contributed to the compilation of the ESRT’s 2025 performance summary. The verification team was chosen based on their competencies in understanding and calculating organizational energy, water, waste and GHG performance, and in evaluating the effectiveness and accuracy of these statements. The energy, water, waste and GHG statem ents presented herein is the responsibility of the verification team.
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83 EMPIRE STATE REALTY TRUST 2025 CORPORATE SUSTAINABILITY REPORT
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