Attorney General Eric Schneiderman subpoenaed the company on Wednesday evening, demanding extensive financial records, emails and other documents, a source familiar with the investigation said on Thursday.
Exxon on Thursday said it was weighing a response to the subpoena. The company has included information about the business risk of climate change for many years in its quarterly filings, corporate citizenship report and in other reports to shareholders, company spokesman Richard Keil said.
A look into climate change issues:
Climate Change, Obama, EPA
New York investigating Exxon over climate statements: source
With AFP Story by Michael MATHES: US-politics-environment-climate,INTERVIEW
Senator Sheldon Whitehouse, D-RI, holds a placard which he had with him during his speeches on the floor of the Senate during an interview with Agence France-Presse at his office in the Hart Senate Office Building on May 14, 2015 on Capitol Hill in Washington, DC. On Monday, May 18, 2015, the two-term Democrat offers his 100th Senate floor speech on climate change -- an unprecedented three-year odyssey demanding Republicans address one of the more pressing concerns of the 21st century. AFP PHOTO / MANDEL NGAN (Photo credit should read MANDEL NGAN/AFP/Getty Images)
WASHINGTON, DC - JUNE 2: U.S. President Barack Obama, seen through an oval office window, reportedly speaks on a conference call hosted by the American Lung Association and other public health groups to discuss the new Environmental Protection Agency (EPA) climate change regulations for carbon pollution from power plants June 2, 2014 in Washington, D.C. The obama adminstration announced regulations that are aimed at reducing carbon emissions from power plants 30 percent from 2005 levels by 2030. (Photo by Ron Sachs-Pool/Getty Images)
Some 5000 union members, led by the United Mine Workers of America, march through downtown Pittsburgh to the William S. Moorhead Federal Building Thursday, July 31, 2014. Thursday is the first of two days of public hearings being held by the Environmental Protection Agency in Pittsburgh to discuss stricter pollution rules for coal-burning power plants proposed by the EPA.(AP Photo/Gene J. Puskar)
FILE - This July 13, 2011 file photo, shows homes flooded by the Souris River in Minot, N.D. Minot is among 10 cities across the nation getting a $25,000 grant and volunteers to improve their ability to handle risks related to climate change, including extreme weather. The help is through the Resilience AmeriCorps initiative that President Barack Obama announced in July 2015. (AP Photo/James MacPherson, File)
U.S. President Barack Obama, center left, speaks while participating in a roundtable discussion on the impacts of climate change on public health with Vivek Murthy, U.S. surgeon general, second from left, Gina McCarthy, administrator of the Environmental Protection Agency (EPA), second from right, and Charlotte Wallace, sustainability coordinator at Anne Arundel Medical Center, third from right, at Howard University in Washington, D.C., U.S., on Tuesday, April 7, 2015. President Obama is warning that climate change will start affecting Americans' health in the near future and he's recruiting top technology companies to help prepare the nation's health systems. Photographer: Andrew Harrer/Bloomberg via Getty Images
Environmental Protection Agency (EPA) Administrator Gina McCarthy, right, flanked by U.S Ambassador to the Holy See, Ken Hackett, answers reporters' questions during a meeting with media in the ambassador residence in Rome, Friday, Jan. 30, 2015. The Obama administration is seeking to hitch its climate change message onto that of the ever-popular Pope Francis, whose upcoming environmental encyclical has drawn more speculation than any papal document in recent memory. The head of the Environmental Protection Agency met Friday with senior Vatican officials who helped draft the document, which is expected to be released in June or July. (AP Photo/Alessandra Tarantino)
FILE - In this March 3, 2015 file photo, Senate Majority Leader Mitch McConnell of Ky. speaks on Capitol Hill in Washington. McConnell is telling states to ignore a central part of President Barack Obama's plans to curb the pollution blamed for global warming. In an op-ed published Tuesday in the Lexington Herald-Leader, Majority Leader Mitch McConnell of Kentucky says states should reject Obama's proposed requirements for power plants to reduce carbon dioxide, the chief greenhouse gas. The rule, expected to be final this summer, would require states to submit plans as soon as 2016, or risk being forced to comply with a federal substitute. (AP Photo/J. Scott Applewhite, File)
Environmental Protection Agency (EPA) Administrator Gina McCarthy listens to reporters' questions during a meeting with media in the U.S Ambassador to the Holy See residence in Rome, Friday, Jan. 30, 2015. The Obama administration is seeking to hitch its climate change message onto that of the ever-popular Pope Francis, whose upcoming environmental encyclical has drawn more speculation than any papal document in recent memory. The head of the Environmental Protection Agency met Friday with senior Vatican officials who helped draft the document, which is expected to be released in June or July. (AP Photo/Alessandra Tarantino)
UNITED STATES - JULY 7: Lilyana Distler, 4, of Waldorf, Md., holds a sign during a 'play-in' protest by kids and mothers in Upper Senate Park organized by Moms Clean Air Force, July 7, 2015. About 400 gathered to support the EPA's Clean Power Plan and call attention to climate change and air pollution. (Photo By Tom Williams/CQ Roll Call)
WASHINGTON, DC - APRIL 18: will.i.am poses backstage during Global Citizen 2015 Earth Day on National Mall to end extreme poverty and solve climate change on April 18, 2015 in Washington, DC. (Photo by Kris Connor/Getty Images for Global Citizen)
State Sen. Fran Pavley, D-Agoura Hills, displays an advertisement used against her 2006 greenhouse gas measure during a news conference to illustrate the same scare tactics used in the Legislature's latest environmental fight, Tuesday, Aug. 25, 2015, in Sacramento, Calif. Pavley's proposal, SB32, calls for cutting greenhouse gas emissions by 80 percent from 1990 levels, by 2050. SB350, by Senate President Pro Tem Kevin de Leon, D-Los Angeles, calls for boosting renewable energy use to 50 percent by 2030. (AP Photo/Rich Pedroncelli)
President Barack Obama waves after touring Everglades National Park on Earth Day, Wednesday, April 22, 2015, in Florida. Obama used the visit to warn of the damage that climate change is already inflicting on the nation's environmental treasures. (AP Photo/Lynne Sladky)
FILE- In this March 8, 2014, file photo steam from the Jeffrey Energy Center coal-fired power plant is silhouetted against the setting sun near St. Marys, Kan. A groundbreaking agreement struck Wednesday, Nov. 12, 2014, by the United States and China puts the world's two worst polluters on a faster track to curbing the heat-trapping gases blamed for global warming. (AP Photo/Charlie Riedel, File)
FILE - In this July 1, 2013, file photo, smoke rises from the Colstrip Steam Electric Station, a coal burning power plant in in Colstrip, Mont. State officials planned a public meeting Tuesday, Sept. 30, 2014, in Colstrip on the U.S. Environmental Protection Agency proposal to cut greenhouse emissions. The town is home to one of the largest coal-fired power plants in the West, a 2,100-megawatt facility that churns out more greenhouse gases than any other source in Montana. (AP Photo/Matthew Brown, File)
Some 300 environmental activists yell their support for stricter pollution rules proposed by the Environmental Protection Agency during a march to the William S. Moorhead Federal Building in downtown Pittsburgh by some 5000 union members, led by the United Mine Workers of America Thursday, July 31, 2014. Thursday is the first of two days of public hearings being held by the Environmental Protection Agency in Pittsburgh to discuss stricter pollution rules for coal-burning power plants proposed by the EPA. (AP Photo/Gene J. Puskar)
The Exxon investigation might expand to other oil companies, according to the people with knowledge of the case, though no additional subpoenas have been issued, the newspaper said.
Sources told the New York Times that the attorney general's investigation began a year ago and encompasses company filings dating back to the 1970s.
Last month, a broad array of environmental groups demanded the U.S. Department of Justice investigate Exxon after reports by Inside Climate News and the Los Angeles Times said the company's own scientists raised worries about global warming decades ago only to see their findings doubted by executives.
However, Ken Cohen, vice president of public and government affairs at Exxon, has accused environmental groups of deliberately cherry-picking facts. He said on Thursday that for nearly 40 years the company has worked with governments and universities to develop climate science in a transparent way.
Since 2009, the company has supported what it calls a revenue-neutral carbon tax as the preferred policy for reducing emissions.
Coal miner Peabody Energy Corp had been under investigation by the attorney general for two years over whether it properly disclosed financial risks related to climate change, but has not resulted in any charges or other legal action against the company, the NYT report added.
Only within the last five years has the U.S. Securities and Exchange Commission required companies to disclose climate risks to investors and Exxon has made the appropriate filings.
Climate risks for oil companies are normally thought to include, among other things, a crackdown by governments on carbon emissions that might hurt oil sales.
(Reporting by Natalie Grover and Sudarshan Varadhan in Bengaluru and Anna Driver in Houston; Editing by Terry Wade and Lisa Shumaker)