A U.S. congressional committee will accuse the biggest Wall Street firms on Tuesday, in a report seen by Reuters ahead of its publication, of colluding with advocacy groups to force companies to shrink their greenhouse gas emissions.

The report is the first of its kind produced by the Republican-led Judiciary Committee in the House of Representatives since it launched an investigation in late 2022 into whether corporate efforts to tackle climate change violate antitrust laws.

Several Republican-controlled states have been already targeting Wall Street firms for entering into climate coalitions and marketing environmental, social and corporate governance (ESG)-focused investment products, fretting that these initiatives will harm jobs in the fossil fuel industry.

This is despite the world failing to live up to an intergovernmental agreement reached in Paris in 2015 to keep global warming to 1.5 degrees Celsius (2.7 degrees Fahrenheit) so it can avoid the most catastrophic effects of climate change.

In the Judiciary Committee's report, the committee staff accuse President Joe Biden's administration of failing to "meaningfully investigate the climate cartel's collusion, let alone bring enforcement actions against its apparent violations of longstanding U.S. antitrust law."

"The goal of any investigation is to inform legislative reforms," a spokesperson for Judiciary Committee chair Jim Jordan said. The spokesperson declined to comment on any interactions with U.S. antitrust regulators regarding the report.

The report said it provided interim findings and that the investigation is continuing.

The committee issued subpoenas for documents and interviewed former regulators during the investigation. Its report on Tuesday focused on Climate Action 100+, a grouping of more than 700 investors focused on getting companies to curb emissions, and credited its investigation for several asset managers ending their membership this year for fear of an antitrust crackdown.

The report says Climate Action 100+ "bullies asset managers to join" and presses them to use their shareholder votes in support of climate proposals, seeking to reduce fossil fuel extraction and raising energy prices for U.S. consumers.

Climate Action 100+ did not immediately respond to a request for comment.

No antitrust lawsuit has been brought against any climate coalition of companies.

The report also takes aim at Climate Action 100+ co-founders, the California Public Employees Retirement System (CalPERS) and climate-focused investor group Ceres for their key support of Climate Action 100+. It says activist investor Arjuna Capital, a member, "seeks to destroy fossil fuel companies."

CalPERS and Arjuna did not immediately respond to requests for comment. Ceres did not immediately provide comment.

The report cited work plans, meeting minutes and other documents it obtained, including an email between Ceres directors comparing their work and that of Climate Action 100+ to "the global Navy" and "the Army ground troops."

Another internal email referenced a Climate Action 100+ plan to replace board members at oil and gas firm Exxon Mobil , and said this effort would "show (Climate Action 100+) has teeth."

Exxon did not immediately respond to a request for comment.

The report also criticized the world's three biggest asset managers, BlackRock, Vanguard and State Street , as members of the "climate cartel."

Representatives for BlackRock, State Street and Vanguard did not immediately respond to requests for comment.

The committee has called witnesses including Ceres president Mindy Lubber to appear at a public hearing on June 12.

(Reporting by Isla Binnie in New York Editing by Nick Zieminski)