US Sen. Elizabeth Warren (D-Mass.) speaks at a forum on access to abortion healthcare in the Hart Senate Office Building on June 23, 2026 in Washington, DC.
Ahead of Anthropic IPO, Warren Warns AI Giant Could Leave 'Americans Holding the Bag'
"Anthropic is saying that AI models could pose catastrophic or existential risks to humanity. At the same time, Anthropic is planning the largest IPO in history."
As the artificial intelligence company Anthropic moves toward a historic initial public offering, the top Democrat on the US Senate Banking, Housing, and Urban Affairs Committee sounded the alarm about both public safety and financial concerns in a Tuesday letter to CEO Dario Amodei.
"I write with concern following your company's disclosure that Anthropic's advanced AI models could 'pose catastrophic or existential risks to humanity' at the same time that it seeks to register as a public company and sell shares in November," said Sen. Elizabeth Warren (D-Mass.).
"Anthropic disclosed extensive public safety and financial risks to the Securities and Exchange Commission (SEC) as part of its registration process for an initial public offering (IPO)," she noted. "An IPO would provide Anthropic with broader access to the largest capital markets in the world, allowing it to raise more funding from a larger pool of investors to fuel its rapid growth."
"It will also mean that millions of Americans with retirement accounts invested in index funds will quickly become Anthropic shareholders," stressed the former Harvard University bankruptcy professor. "Public pensions are already heavily exposed to Anthropic and have expressed their concerns about Anthropic's societal risks ahead of its IPO."
According to the SEC paperwork, Anthropic plans to list on the Nasdaq under ticker symbol "ANT." Reports have suggested the company—known for its Claude models—could be valued at between $1.5 trillion and $2 trillion. As NPR noted: "That would put it in league with Elon Musk's rocketry and AI company SpaceX, which was valued at around $1.8 trillion when it listed in June."
Warren pointed out to Amodei that "this massive influx of public capital is likely to catapult the development and deployment of your technology during a time of intense public debate and concern about the risks of your frontier intelligence models."
The senator argued that "the risks presented by this technology demand greater scrutiny before they become intertwined with the public capital markets, which could further escalate both public safety and systemic financial risks."
The "growing public safety concerns" section of Warren's letter cites details from the Form S-1 that Anthropic submitted to the SEC, as well as the CEO's public statements "calling for the need to slow down the development of frontier AI models."
"You warned that 'we still only understand a tiny fraction of what goes on inside these models' and highlighted the 'risk of losing control of AI systems, misuse of AI for cyberattacks and bioterrorism, and serious economic disruption,'" she reminded Amodei. "You further warned that a 'race to the bottom, spurred by commercial incentives, can make these risks more acute.'"
"It is also difficult to trust existing safety tests and evaluations of model test environments in the wake of recent incidents in which models built by frontier AI companies, including Anthropic, have broken through security controls and hacked external systems autonomously," the senator emphasized.
Such incidents have intensified AI experts' warnings and spurred calls for government action, leading to a range of legislative proposals, including in the US Congress—the future control of which will be decided in next week's midterm elections.
Warren highlighted that "in addition to the potentially catastrophic safety risks posed by Anthropic's technology, the company's launch into the public markets could inject extreme volatility and risk into the financial system, which threatens to undermine Americans' economic security."
"Anthropic is projected to be the largest IPO in history," she wrote. "Given its unprecedented size, swings in Anthropic's share price have the potential to roil the broader markets on day one, particularly for companies in the technology sector, and even more acutely for megacap companies with direct financial entanglement with Anthropic."
"Beyond the threats to the financial system that Anthropic's IPO may pose, the company's registration statement disclosures include astronomical projections supported by aggressive assumptions that require further review and due diligence," she added, digging into the company's disclosures.
Warren also sent Amodei a detailed list of questions she wants answered by November 3—before the company goes public.
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As the artificial intelligence company Anthropic moves toward a historic initial public offering, the top Democrat on the US Senate Banking, Housing, and Urban Affairs Committee sounded the alarm about both public safety and financial concerns in a Tuesday letter to CEO Dario Amodei.
"I write with concern following your company's disclosure that Anthropic's advanced AI models could 'pose catastrophic or existential risks to humanity' at the same time that it seeks to register as a public company and sell shares in November," said Sen. Elizabeth Warren (D-Mass.).
"Anthropic disclosed extensive public safety and financial risks to the Securities and Exchange Commission (SEC) as part of its registration process for an initial public offering (IPO)," she noted. "An IPO would provide Anthropic with broader access to the largest capital markets in the world, allowing it to raise more funding from a larger pool of investors to fuel its rapid growth."
"It will also mean that millions of Americans with retirement accounts invested in index funds will quickly become Anthropic shareholders," stressed the former Harvard University bankruptcy professor. "Public pensions are already heavily exposed to Anthropic and have expressed their concerns about Anthropic's societal risks ahead of its IPO."
According to the SEC paperwork, Anthropic plans to list on the Nasdaq under ticker symbol "ANT." Reports have suggested the company—known for its Claude models—could be valued at between $1.5 trillion and $2 trillion. As NPR noted: "That would put it in league with Elon Musk's rocketry and AI company SpaceX, which was valued at around $1.8 trillion when it listed in June."
Warren pointed out to Amodei that "this massive influx of public capital is likely to catapult the development and deployment of your technology during a time of intense public debate and concern about the risks of your frontier intelligence models."
The senator argued that "the risks presented by this technology demand greater scrutiny before they become intertwined with the public capital markets, which could further escalate both public safety and systemic financial risks."
The "growing public safety concerns" section of Warren's letter cites details from the Form S-1 that Anthropic submitted to the SEC, as well as the CEO's public statements "calling for the need to slow down the development of frontier AI models."
"You warned that 'we still only understand a tiny fraction of what goes on inside these models' and highlighted the 'risk of losing control of AI systems, misuse of AI for cyberattacks and bioterrorism, and serious economic disruption,'" she reminded Amodei. "You further warned that a 'race to the bottom, spurred by commercial incentives, can make these risks more acute.'"
"It is also difficult to trust existing safety tests and evaluations of model test environments in the wake of recent incidents in which models built by frontier AI companies, including Anthropic, have broken through security controls and hacked external systems autonomously," the senator emphasized.
Such incidents have intensified AI experts' warnings and spurred calls for government action, leading to a range of legislative proposals, including in the US Congress—the future control of which will be decided in next week's midterm elections.
Warren highlighted that "in addition to the potentially catastrophic safety risks posed by Anthropic's technology, the company's launch into the public markets could inject extreme volatility and risk into the financial system, which threatens to undermine Americans' economic security."
"Anthropic is projected to be the largest IPO in history," she wrote. "Given its unprecedented size, swings in Anthropic's share price have the potential to roil the broader markets on day one, particularly for companies in the technology sector, and even more acutely for megacap companies with direct financial entanglement with Anthropic."
"Beyond the threats to the financial system that Anthropic's IPO may pose, the company's registration statement disclosures include astronomical projections supported by aggressive assumptions that require further review and due diligence," she added, digging into the company's disclosures.
Warren also sent Amodei a detailed list of questions she wants answered by November 3—before the company goes public.
- 'Humans First': Bernie Sanders Responds to Elon Musk Concern for AI 'Feelings' ›
- Anthropic Report Says Company Blocked Possible Use of AI Model to Build Biological Weapons ›
- Anthropic Researcher Quits, Citing Internal Fears That AI 'Could Kill Us All' This Decade ›
- Anthropic Discloses Hacking Incidents Amid Alarm Over OpenAI Autonomous Cyberattacks ›
- Anthropic Building a 'Pre-Crime' System to Surveil Anti-AI Dissenters, Investigation Shows ›
As the artificial intelligence company Anthropic moves toward a historic initial public offering, the top Democrat on the US Senate Banking, Housing, and Urban Affairs Committee sounded the alarm about both public safety and financial concerns in a Tuesday letter to CEO Dario Amodei.
"I write with concern following your company's disclosure that Anthropic's advanced AI models could 'pose catastrophic or existential risks to humanity' at the same time that it seeks to register as a public company and sell shares in November," said Sen. Elizabeth Warren (D-Mass.).
"Anthropic disclosed extensive public safety and financial risks to the Securities and Exchange Commission (SEC) as part of its registration process for an initial public offering (IPO)," she noted. "An IPO would provide Anthropic with broader access to the largest capital markets in the world, allowing it to raise more funding from a larger pool of investors to fuel its rapid growth."
"It will also mean that millions of Americans with retirement accounts invested in index funds will quickly become Anthropic shareholders," stressed the former Harvard University bankruptcy professor. "Public pensions are already heavily exposed to Anthropic and have expressed their concerns about Anthropic's societal risks ahead of its IPO."
According to the SEC paperwork, Anthropic plans to list on the Nasdaq under ticker symbol "ANT." Reports have suggested the company—known for its Claude models—could be valued at between $1.5 trillion and $2 trillion. As NPR noted: "That would put it in league with Elon Musk's rocketry and AI company SpaceX, which was valued at around $1.8 trillion when it listed in June."
Warren pointed out to Amodei that "this massive influx of public capital is likely to catapult the development and deployment of your technology during a time of intense public debate and concern about the risks of your frontier intelligence models."
The senator argued that "the risks presented by this technology demand greater scrutiny before they become intertwined with the public capital markets, which could further escalate both public safety and systemic financial risks."
The "growing public safety concerns" section of Warren's letter cites details from the Form S-1 that Anthropic submitted to the SEC, as well as the CEO's public statements "calling for the need to slow down the development of frontier AI models."
"You warned that 'we still only understand a tiny fraction of what goes on inside these models' and highlighted the 'risk of losing control of AI systems, misuse of AI for cyberattacks and bioterrorism, and serious economic disruption,'" she reminded Amodei. "You further warned that a 'race to the bottom, spurred by commercial incentives, can make these risks more acute.'"
"It is also difficult to trust existing safety tests and evaluations of model test environments in the wake of recent incidents in which models built by frontier AI companies, including Anthropic, have broken through security controls and hacked external systems autonomously," the senator emphasized.
Such incidents have intensified AI experts' warnings and spurred calls for government action, leading to a range of legislative proposals, including in the US Congress—the future control of which will be decided in next week's midterm elections.
Warren highlighted that "in addition to the potentially catastrophic safety risks posed by Anthropic's technology, the company's launch into the public markets could inject extreme volatility and risk into the financial system, which threatens to undermine Americans' economic security."
"Anthropic is projected to be the largest IPO in history," she wrote. "Given its unprecedented size, swings in Anthropic's share price have the potential to roil the broader markets on day one, particularly for companies in the technology sector, and even more acutely for megacap companies with direct financial entanglement with Anthropic."
"Beyond the threats to the financial system that Anthropic's IPO may pose, the company's registration statement disclosures include astronomical projections supported by aggressive assumptions that require further review and due diligence," she added, digging into the company's disclosures.
Warren also sent Amodei a detailed list of questions she wants answered by November 3—before the company goes public.
- 'Humans First': Bernie Sanders Responds to Elon Musk Concern for AI 'Feelings' ›
- Anthropic Report Says Company Blocked Possible Use of AI Model to Build Biological Weapons ›
- Anthropic Researcher Quits, Citing Internal Fears That AI 'Could Kill Us All' This Decade ›
- Anthropic Discloses Hacking Incidents Amid Alarm Over OpenAI Autonomous Cyberattacks ›
- Anthropic Building a 'Pre-Crime' System to Surveil Anti-AI Dissenters, Investigation Shows ›