Two in Five Corporate Climate Target Changes Cut Ambition

Eighty-three per cent of Russell 3000 companies that announced at least one emissions reduction target revised it before the target year arrived, according to a database the Salata Institute at Harvard University opened to the public on 21 September 2026. About 42 per cent of those revisions set a less ambitious target. About 15 per cent raised ambition, and about 44 per cent left it where it was.

The Corporate Climate Targets Database is free, downloadable and built from company filings rather than survey responses. It covers the Russell 3000, which the institute puts at about 98 per cent of US public equities by market capitalisation, and reads targets out of sustainability reports, annual reports, 10-K filings and press releases from 2000 through 2024. Those targets are then mapped against emissions trends drawn from S&P Global Trucost Environmental data. The project is led by Joseph Aldy of the Harvard Kennedy School and Michael Toffel of Harvard Business School, and was presented at Climate Week NYC the day after launch.

A net 79 companies dropped out in one year

The revision figures measure changes to targets that still exist. A second number in the database measures companies walking off the field entirely: the total holding any climate target fell from 1,135 in 2023 to 1,056 in 2024, a net loss of 79 in a single year. That is the sharper signal, because a weakened target still leaves a public number to be held to, and a dropped one leaves nothing.

The utilities that actually made their dates

One sector is far enough along to be scored rather than tracked. Twenty-four electric utilities in the database set emissions reduction targets with deadlines before 2025, and about 45 per cent of them met those targets. That is the closest thing the dataset currently offers to a hit rate, and it comes from the sector with the most regulated capital planning and the clearest technology path. Whether it flatters or damns the voluntary system depends on what a reader expected from a promise made a decade out.

The federal numbers are being switched off

Harvard's Environmental and Energy Law Program, which published its own note on the database on 22 September, set the launch against a shrinking official record. The administration has proposed ending the Greenhouse Gas Reporting programme, which obliges companies in high-emitting sectors to report annually, and the Securities and Exchange Commission has begun rescinding the climate-related risk disclosure rule that litigation had already kept from taking effect. Abby Husselbee, a staff attorney at the programme, told Harvard Business School's Institute for Business in Global Society that the team was "noting where we see companies going quiet in this uncertain period".

The counter-current is at state level. In California, hundreds of companies have filed climate-related risk reports even though a court ruling paused enforceability of the new requirement, and the law programme reports that over half of those filers are disclosing publicly for the first time. Many are private or smaller US firms that no federal rule reached. Parallax Nexus reported on 9 September on hyperscalers signing long clean-power contracts before breaking ground, which is the same corporate calculation seen from the procurement side rather than the disclosure side.

The judgment worth stating plainly is that the database's value is not the 42 per cent. It is that revisions are now countable at all, across nearly 3,000 companies rather than the few dozen that draw coverage, which turns a genre of announcement into a series with a record. "This tool enables everyone to see what is happening across nearly 3,000 companies, including firms that rarely make headlines," Toffel said in the launch announcement.

Two limits matter when reading the headline number. The 42 per cent counts revisions, not firms, so it does not mean that two in five companies weakened their goals; Harvard Business School's own write-up of the launch described it as 42 per cent of companies, which the institute's release does not support. And the database records what companies said, not what they emitted, so whether target-setters cut faster than non-setters is the question the team says it has yet to publish an answer to.