here's the wikipedia entry on exxon - it does seem that the legal system is working on this against Exxon. On the issues Warren brought up. States (not the feds) are suing exxon for various things.
Which could go either way: 1) warren could be loading extra laws when laws aren't needed and the present ones are working or 2) Warren could be patching some federal holes in an incomplete net.
I don't know enough and don't want to spend time figuring it all out. I do know that Warren is an angry ideological warrior against corporate america so anything she says that is even vaguely challengeable should be challenged and not accepted as is.
State and federal investigations
In May 2015 Sheldon Whitehouse suggested in The Washington Post that the federal prosecution of the tobacco industry might set a precedent for the oil industry.[89] In October, Whitehouse, Richard Blumenthal, Elizabeth Warren and Ed Markey issued a letter to Exxon questioning their donations to Donors Trust, a group which funds climate change denial.[90] On October 14, 2015, Ted Lieu and Mark DeSaulnier wrote to the United States Attorney General (US AG) requesting an investigation into whether ExxonMobil violated any federal laws by "failing to disclose truthful information" about climate change.[91][92] Asked about the letter by The Guardian, an Exxon spokesperson said "This is complete bullshit. We have a 30 year continuous uninterrupted history of researching climate change..."[93]
On October 30, 2015, more than 40 leading US environmental and social justice organizations wrote to the US AG requesting a federal investigation into ExxonMobil deceiving the public about climate change.[94] Former Vice President Al Gore and all three Democratic primary candidates for President of the United States called for a Department of Justice investigation.[95][96] Marjorie Cohn, law professor at the Thomas Jefferson School of Law in San Diego, California, called for the revocation of ExxonMobil's articles of incorporation.[97][98]
In 2015, the New York Attorney General launched an investigation whether ExxonMobil's statements to investors were consistent with the company's decades of extensive scientific research.[99][100] In October 2018, based on this investigation, ExxonMobil was sued by the State of New York, which claimed the company defrauded shareholders by downplaying the risks of climate change for its businesses.[101]
Following published reports, based on internal Exxon documents, suggesting that during the 1980s and 1990s Exxon used climate research in its business planning but simultaneously argued publicly that the science was unsettled, the California Attorney General is investigating whether ExxonMobil lied to the public or shareholders about the risk to its business from climate change, possible securities fraud, and violations of environmental laws. ExxonMobil denied wrongdoing.[102][103] On March 29, 2016, the attorneys general of Massachusetts and the United States Virgin Islands announced investigations. Seventeen attorneys general were cooperating on investigations. Exxon said the investigations were "politically motivated."[104][105][106]
In June, the attorneys general of the United States Virgin Islands withdrew the subpoena.[107] As of June 2016, ExxonMobil is suing the attorneys general of Massachusetts Maura Healey.[108]
According to a 2019 article in InsideClimate News by David Hasemyer, the U.S.Supreme Court found in favor of Massachusetts Attorney General Maura Healey and allowed their case against Exxon to move forward.[109] As a result of the SCOTUS decision, Exxon can no longer withhold records that the AG needs for their investigation into whether Exxon concealed that they were cognizant of the fossil fuels contributing to climate change and knowingly misled both the public and their own investors.[109]