Environmental

Marine Transportation – GHG Emissions

~98% of Kirby’s emissions are from the marine transportation fleet

Emissions Reductions (2015 to 2025)

• Since 2015, total CO2e emissions have declined ~16% despite significant growth in the fleet​
  • Total barrel capacity up 18%​
  • Result of inland fleet acquisitions offset by offshore fleet retirements​
• Since 2015, average age of inland boats is down ~13 years and offshore boats is down ~18 years

Emissions Reduction Targets

Short term target: ​25% emissions reduction per barrel of capacity by 2024​

• Target achieved in 2024​

Long term target: ​40% reduction of emissions per barrel of capacity by 2040

Scope 2 Emissions Performance

• 100% of Scope 2 energy is consumed from the grid
• Signed a 36-month agreement for 100% green e-certified energy for all Kirby marine transportation facilities in Texas
  • 100% renewable representation
  • ~23% of Scope 2 energy is renewable

*Barrel capacities reflect Kirby Inland Marine and Kirby Offshore Marine operating tank barge

Note: Kirby uses EPA emission factors to calculate Scope 1, 2 & 3 emissions

Kirby’s commitment to decarbonization with a 40% intensity reduction by 2040 of Scope 1 Emissions, roughly 160,000 metric tons of CO2 is well underway. Through appropriate combination of these initiatives, the potential exists to meet emission targets without the application of carbon offsets.

• Dedicated development of future carbon reduction techniques, alternative fuels, and power sources and their respective supply chains.
•  Embedded emission reduction strategies in operations:
  • Fuel management procedure implemented
  • Extensive fleeting network and fleet boat capacity enables delivery of barge equipment to customer docks with smaller horsepower vessels
  • Company policy to require shutdown of main engines during cargo transfer (when safe to do so as determined by the captain)

• Company policy does not allow for the discharge of bilge overboard, even if the vessel is equipped with an oil-water separator

• Large tank barge fleet reduces unnecessary emissions and waste
  • Dedicated product tows reduce barge cleaning between cargos
  • Smaller fleeting boats reduce fuel consumption and emissions
  • Linehaul service improves overall barge to boat ratio (Kirby 3:1, industry 2:1)
• Ongoing boat and engine replacement program improves efficiencies and reduces emissions
• Starting in 2014, Kirby began transitioning its engine service oil changes from mineral to synthetic to better serve the equipment and the environment.
  • 70% of inland marine boats use synthetic oil
• Barge cleaning facility operations focus on residualcargo recovery seeking to mitigate waste andefficiency on the cleaning process, reducingemissions by approximately 98% (based on internalestimates)
• Kirby serves as a leader in numerous industry organizations that help define industry regulations and improve air and water quality

• At Kirby, no spill is too small – all cargo spills, even if only 1 drop, are recorded and reported​
• Cargo spills to water have declined since 2002 representing an 85% decrease​
• In 2025, approximately 5,100 cargo transfer audits were completed
• Kirby is committed to continuous improvement through cargo transfer audits, regular tankerman proficiency evaluations, advanced training courses, review and implementation of best practices, review of near-miss events, and quarterly tankerman meetings​