The number of companies in Ireland reporting on their carbon emissions rose 11% last year to a total of 257, the latest CDP Ireland Climate Change Report shows.
The report also shows a significant improvement in the quality of emissions reduction, with a 56% increase in the number of Irish companies achieving a "B" grade or higher.
Irish listed companies making the top 10 in the report for 2018 included AIB, Kingspan, CRH and Kerry Group. Hotel group Dalata was also welcomed as a first-time responder in 2018.
But CDP said companies who were asked to respond to its questionnaire but did not included Cairn Homes, Paddy Power Betfair, Permanent TSB and Ryanair.
It said its Ireland Network will continue to encourage non-responding companies to engage with the CDP programme as the world's leading climate change reporting platform.
CDP - formerly the Carbon Disclosure Project - is the international investor led not-for-profit that measures environmental impact of companies around the world.
It assessed over 7,000 companies last year across a range of different environmental standards, providing investors with verifiable data upon which to base their decisions.
The CDP Ireland Network represents the CDP's interests in Ireland. Supported by EPA and SEAI, the network has attracted over 80 members to date.
Caroline Pope, Chairperson of the CDP Ireland Network, said 2018 was a year of progress on climate action.
But she said that the country still have some catching up to do given that the Climate Change Advisory Council has warned that Ireland is off course in achieving its 2020 and 2030 emissions reductions targets.
"We want to see a thriving economy that works for people and the planet in the long term, and this requires companies and investors to build a truly sustainable economy by measuring and understanding their environmental impact," Ms Pope said.