Susan Collins Stock Trades — Senator Portfolio, Disclosures & Trading History

Susan Collins has represented Maine in the U.S. Senate since 1997, making her the longest-serving Republican woman in Senate history. She is widely described as a moderate Republican and has been a frequent swing vote on health care, infrastructure appropriations, and judicial confirmations across multiple administrations. Her committee assignments in the 119th Congress (2025-2026) span five panels: Appropriations (where she serves on the Agriculture, Defense, and Labor-HHS subcommittees), Health Education Labor and Pensions, Intelligence, Rules and Administration, and the Special Committee on Aging where she serves as Ranking Member. These positions give her direct oversight of federal spending, health policy, and intelligence funding — sectors that include many of the publicly traded companies in her filing history. I've tracked Collins' filings since late 2024 — her claim to have never personally owned any stock during 29 years in the Senate is the strongest personal denial I have seen from any member across the 50+ congressional portfolios I monitor. Her husband Tom Daffron worked as chief of staff to Senator William Cohen and later as a lobbyist; their combined net worth is estimated at roughly $6.6 million per Quiver Quantitative's September 2025 analysis, with approximately $3.8 million in publicly traded assets.

Collins' trading history contains several transactions that stand out for their size or timing. Dollar amounts reflect the mandatory reporting ranges used in Senate STOCK Act disclosure forms — exact figures are not publicly available. February 20, 2015 — Purchased up to $50,000,000 of 3M (MMM) stock. This is one of the largest single-stock purchases I have seen from any member of Congress in the past decade. The position returned an estimated 7.6% through mid-2025 per Quiver Quantitative — a modest gain given the size. December 1, 2016 — Purchased up to $50,000 of Tractor Supply (TSCO). Estimated return through mid-2025: roughly 194%, making it the best-performing equity in Collins' filing history by percentage. January 6, 2022 — Purchased up to $50,000 of Nvidia (NVDA). When I cross-checked this date against Nvidia's price history, the purchase came when the stock was trading around the $250-300 pre-split range — roughly two months before the broader 2022 tech selloff deepened. Since purchase, the position has returned an estimated 367% per Quiver Quantitative tracking. That makes it the best single-equity trade by total gain in her disclosed history. December 16, 2020 — Sold up to $100,000 of Dunkin' Brands (DNKN) shortly after the company's acquisition by Inspire Brands closed, a routine post-M&A exit. August 5, 2024 — Sold up to $50,000 of Globe Life (GL). This was Collins' only individual stock trade in all of 2024. Her other 2024 filings show municipal bond purchases (up to $100K in August, up to $50K in September) and corporate bond buys, including a Pfizer bond in February 2026 for $15,000-$50,000.