Since the passage of the STOCK Act in 2012, dozens of members of Congress have been caught violating stock trading rules. Some cases involved suspiciously timed trades worth millions of dollars. Others involved chronic late filing of mandatory disclosures. In nearly every case, the outcome was the same: no meaningful consequence. This timeline documents the most significant cases, what each member did, and how the system responded — or failed to respond.
Before the STOCK Act: The Wild West Era
Prior to 2012, congressional insider trading existed in a legal gray area. While the Securities Exchange Act of 1934 prohibited insider trading by corporate insiders, whether it applied to members of Congress was genuinely debated. Some legal scholars argued that legislators owed no fiduciary duty to the public markets and therefore could not commit insider trading in the traditional sense.
This ambiguity allowed members to trade with impunity for decades. A landmark 2004 study by Georgia State University professors Alan Ziobrowski, Ping Cheng, James Boyd, and Brigitte Ziobrowski found that U.S. senators' stock portfolios outperformed the market by approximately 12 percentage points per year — a performance gap that would be virtually impossible without an informational advantage.
The pre-STOCK Act era saw occasional controversies but no prosecutions. Members traded freely on knowledge gained from committee hearings, classified briefings, and private meetings with industry lobbyists. The public had no real-time access to disclosure filings, and media coverage of congressional trading was sporadic at best.
2012: The STOCK Act Passes — Then Gets Quietly Gutted
The Stop Trading on Congressional Knowledge Act, known as the STOCK Act, was signed into law on April 4, 2012 by President Obama. The law explicitly confirmed that members of Congress and their staff are subject to insider trading prohibitions. It required electronic filing of financial disclosures and mandated that filings be made publicly available online.
The law passed with overwhelming bipartisan support: 96-3 in the Senate and 417-2 in the House. It was celebrated as a landmark transparency measure. But just one year later, Congress quietly passed an amendment that stripped the online disclosure requirement for congressional staff. The amendment was passed with virtually no debate, no recorded vote, and signed into law by President Obama with no press conference. The gutting of the STOCK Act's most important provision received almost no media coverage at the time.
2018: Chris Collins — The Only Conviction
Representative Chris Collins, Republican of New York, holds the dubious distinction of being the only sitting member of Congress arrested on insider trading charges in the modern era. Collins served on the board of directors of Innate Immunotherapeutics, an Australian biotechnology company. On June 22, 2017, Collins received an email from the company's CEO informing him that its flagship drug had failed a clinical trial — information that would devastate the stock price once made public.
Within minutes of receiving the email, Collins called his son Cameron Collins, who then sold his shares and tipped off others. The trades avoided approximately $768,000 in losses. Collins himself did not sell — his shares were held in an account that was restricted during the trading window — but the call to his son was the illegal act.
The case was notable because it did not involve legislative information. Collins was trading on corporate information obtained through his board seat, which made it a more conventional insider trading case. The DOJ charged him in August 2018 with conspiracy to commit securities fraud, wire fraud, and making false statements. Collins initially denied the charges and won re-election in November 2018 while under indictment, before pleading guilty in October 2019.
He was sentenced to 26 months in federal prison in January 2020 and reported to prison in October 2020. Two months later, President Trump granted him a full pardon in December 2020. The pardon meant Collins served approximately two months of his sentence. The case remains the closest thing to accountability the system has produced — and it ended with a pardon.
2020: The COVID-19 Trading Scandal
The largest wave of congressional trading investigations was triggered by the COVID-19 pandemic. On January 24, 2020, the full Senate received a classified briefing about the emerging coronavirus threat. In the days and weeks following the briefing, several senators made significant portfolio changes that appeared to reflect non-public knowledge of the coming pandemic.
Richard Burr (R-NC) sold between $628,000 and $1.72 million in stocks on February 13, 2020, dumping shares in hotel and travel companies weeks before the market crashed. As chairman of the Senate Intelligence Committee, Burr had access to the most detailed intelligence about the virus. The FBI seized his cell phone, and he stepped down as committee chairman. The DOJ closed its investigation in January 2021 without filing charges.
Kelly Loeffler (R-GA) and her husband Jeffrey Sprecher — chairman of the Intercontinental Exchange, which owns the NYSE — sold between $1.3 million and $3.1 million in stocks while simultaneously purchasing shares in remote-work companies like Citrix. The DOJ investigation was closed without charges. Loeffler lost her Senate seat in the January 2021 Georgia runoff, where her trades were a central campaign issue.
David Perdue (R-GA) made 2,596 stock trades during his single Senate term, including transactions in companies whose business was directly affected by legislation before his committees. He bought stock in a company that produced personal protective equipment as the pandemic escalated. Like Loeffler, Perdue lost his seat in the Georgia runoff.
Dianne Feinstein (D-CA) sold $1.5 million to $6 million in stock through her husband Richard Blum on January 31, 2020. She stated she was not at the briefing and that her husband made independent trading decisions. The DOJ cleared her relatively quickly.
For a detailed account of the COVID trading scandal, see our biggest congressional trading scandals article.
2021-2023: The Late Filing Epidemic
As public scrutiny of congressional trading intensified after the COVID scandal, journalists and watchdog organizations began systematically tracking compliance with the STOCK Act's 45-day disclosure deadline. What they found was staggering.
An investigation by Business Insider in 2021 and 2022 identified 78 members of Congress who had violated the STOCK Act's disclosure requirements. Some filings were weeks late. Others were months late. A few were over a year late. The violations spanned both parties, both chambers, and members of all seniority levels.
The penalty for late filing under the STOCK Act is a $200 fine — an amount so trivial for members earning $174,000 per year that it functions as less of a deterrent and more of a nominal processing fee. Moreover, the fine is frequently waived entirely by the House and Senate Ethics Committees. You can see which members are currently filing late on our late filers analysis page.
Notable late filers have included members of both parties. Representatives and senators who chair powerful committees — the very members with the most market-moving information — have been among the most chronic violators. The late filing problem is not a matter of individual bad actors; it is a systemic failure of the disclosure regime.
2023-2025: Tommy Tuberville and Ongoing Violations
Senator Tommy Tuberville, Republican of Alabama, became a lightning rod for congressional trading criticism after reports revealed that he had failed to properly disclose dozens of stock transactions. Tuberville, who serves on the Senate Armed Services Committee, traded stocks in defense contractors and other companies with business before his committee.
Despite publicly supporting a congressional stock trading ban, Tuberville continued to actively trade stocks. He acknowledged the late filings, attributing them to administrative errors, and paid the nominal fines. No further enforcement action was taken.
Other recent cases have followed a similar pattern. Members are identified as having traded in companies with business before their committees, questions are raised, the member attributes the trades to a financial advisor or family member, a nominal fine may be paid, and the matter is dropped. The cycle repeats. You can track all disclosed trades in real time on the CongressFlow trades page.
The Pattern of Non-Enforcement
Across more than a decade of the STOCK Act's existence, a clear pattern has emerged. The law creates the appearance of regulation without the substance of enforcement. Members of Congress are required to disclose their trades, but the penalties for failing to do so are negligible. They are prohibited from trading on material non-public information obtained through their official duties, but the evidentiary standard for proving this is nearly insurmountable.
The enforcement architecture is fundamentally broken. The House and Senate Ethics Committees — bodies composed of the members' own colleagues — are responsible for initial oversight. These committees have strong institutional incentives to avoid aggressive enforcement, since any precedent they set could be used against the very members who sit on them.
The DOJ and SEC can investigate and prosecute, but they face the constitutional barrier of the Speech or Debate Clause and the practical challenge of proving that a specific trade was motivated by non-public legislative information rather than publicly available analysis. In the only case where charges were brought — Chris Collins — the trading was based on corporate information, not legislative knowledge, making it a more conventional securities fraud case.
The result is a system where the rules exist on paper but are effectively unenforceable in practice. For a deeper examination of the legal framework, see our guide on the STOCK Act explained. Until the incentive structure changes — whether through mandatory blind trusts, outright trading bans, or independent enforcement — the pattern of non-enforcement is likely to continue.
