Cantor Fitzgerald faces Senate Democrat's probe over Tether ties

What happened

Cantor Fitzgerald faces scrutiny from a Senate Democrat over its Tether ties. Senator Richard Blumenthal, the ranking Democrat on the Senate Permanent Subcommittee on Investigations, sent a letter to Cantor chairman Brandon Lutnick on October 8. He requested records about the firm's earnings, custody services and sanctions monitoring. He also asked for communications involving Commerce Secretary Howard Lutnick.

Blumenthal alleges that Cantor's Tether stake rose in estimated value from $600 million to $10 billion after Trump returned to office. He says Howard Lutnick received more than $250 million in that period, including a $192 million distribution from Cantor Fitzgerald.

Blumenthal asked the US Treasury and Justice Department to investigate possible sanction violations. Tether said it has worked with law enforcement for years and has frozen nearly $550 million in Iran-linked USDT this year.

Why it matters

The inquiry puts Cantor's partnership with Tether under scrutiny. It asks how Cantor monitors Tether's compliance with banking and sanctions laws. Blumenthal wrote that Cantor's business arrangements with Tether come at the expense of America's national security.

The letter follows a report by Democratic investigators last month alleging Tether's USDT became a major channel for Iran's shadow banking network. Tether says it froze nearly $550 million in Iran-linked USDT this year.

The letter does not establish that either company violated U.S. law. The $10 billion estimate comes from external reporting and has not been confirmed by a public company valuation.

What the data shows

Cantor Fitzgerald acquired rights to a 5% stake in Tether in 2024. Blumenthal estimates the value of Cantor's interest rose from $600 million to about $10 billion. He claims Howard Lutnick received more than $250 million after Trump's return to office, including a $192 million distribution.

Tether says it froze nearly $550 million in Iran-linked USDT this year. The senator claims Cantor earns tens of millions of dollars annually from assets held on Tether's behalf.

The response deadline is October 23, 2026. The letter was sent on October 8.

Background

Cantor began its Tether relationship in 2021 as a custodian for part of the US Treasuries backing the stablecoin's reserves. Howard Lutnick led Cantor as chairman and CEO then and helped negotiate its Tether investment in April 2024.

Lutnick left Cantor's leadership after the Senate confirmed him as commerce secretary in February 2025. The firm made his son Brandon chairman and his other son Kyle vice chairman.

Blumenthal also wants the terms of Howard Lutnick's exit from Cantor. He asks about any Tether loan or financing to Lutnick or his family that helped transfer ownership to his children.

What is still unclear

• The letter does not establish that either company violated U.S. law.
• The $10 billion estimate comes from external reporting and has not been confirmed by a public company valuation.
• Blumenthal's national security criticism is an allegation, not a finding by a court or enforcement agency.

What to watch

• 2026-10-23 Cantor Fitzgerald's response to Blumenthal's letter is due.

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