Richard Blumenthal Stock Trades

The most striking thing about Senator Richard Blumenthal's disclosure record is not any single trade but the sheer acceleration in volume. Across roughly fourteen years of disclosed transaction history, from February 2012 through June 2026, 1,304 transactions have been disclosed under his name. Of those, 420 have transaction dates in 2025 alone, and 277 more are dated in the first half of 2026, through June 24, putting the current year on pace to rival or exceed last year's total. By contrast, every year from 2012 through 2024 came in under 100 transactions, with most years in the 20 to 90 range. That is a step change in reporting frequency, not a gradual drift.

A second pattern matters just as much for how this record should be read. Of the 1,304 disclosed transactions, 1,223 carry the "SP" attribution code, meaning spouse. Only 62 are attributed directly to the senator himself, two are joint, one is tied to a dependent child, and 16 carry no attribution code at all and cannot be linked to any individual. This is, overwhelmingly, a record of a spouse's disclosed activity rather than the senator's own trading.

What the Recent Activity Actually Is

The transactions driving the 2025 and 2026 surge look different from the standard buy-a-stock, sell-a-stock pattern. The most recent filings cover transactions in June 2026, disclosed on July 17, 2026, and late May 2026, disclosed on June 8, 2026. They consist of purchases and sales in named LLC and LP entities such as MH Built to Last (LLC), MH Four Winds (LLC), Days Between (LLC), Decibel Partners I (LP) and Decibel Partners III (LP), Commodore Capital Domestic (LP), and Radcliff Industrial Holdings I (Feeder) (LLC). Many are recorded under layered names that reference family LLCs and other entities, with security names such as "Peter L Malkin Family 9 LLC - 3M's Partners LLC: MH Built to Last (LLC)" or "Hedge Holdings LLC: MH Built to Last (LLC)" appearing repeatedly. Disclosed amounts on these entries range from the smallest reportable band of $1,001 to $15,000 up to several in the $250,001 to $500,000 and $500,001 to $1,000,000 ranges. These entries carry no ticker, company description, or sector classification in the disclosure data. Across the full record, 1,250 of the 1,304 transactions fall into an "Unknown" sector bucket.

The cited filings keep transaction dates distinct from disclosure dates: the late-May transactions appear in the June 8 filing, while the June transactions appear in the July 17 filing. These reports are part of the periodic transaction reporting framework established by the Stop Trading on Congressional Knowledge Act of 2012.

Named Companies and Sector Themes

Set against 537 sitting members of Congress, 276 of whom have zero disclosed trades on file, a 1,304-transaction record stands out for its frequency even before considering size. But when the record does touch identifiable, named public companies, a few show up repeatedly. iHeartMedia Inc Class A (IHRT), classified under Communication Services, appears in 10 disclosed transactions through November 2023, split between purchases and sales. Api Group Corp (APG), classified under Industrials, appears in 7 transactions, six of them purchases, through September 2022. Robinhood Markets (HOOD), classified under Financials, appears in 5 disclosed sales through June 2023. iRhythm Technologies (IRTC) and Sera Prognostics (SERA), both classified under Health Care, each appear in 5 disclosed sales, with the latest transaction date for each on August 14, 2025.

Beyond the most frequently disclosed names, single or paired transactions touch a broad set of recognizable companies: Alibaba Group Holding (BABA, Consumer Discretionary), Pinterest (PINS, Communication Services), Welltower (WELL, Real Estate), Golub Capital BDC (GBDC, Financials), and Empire State Realty Trust (ESRT, Real Estate). A cluster of names, including Amazon.com (AMZN), Alphabet Class C (GOOG), Intel (INTC), and Microsoft (MSFT), were each disclosed as single sales dated December 29, 2023. An earlier cluster shows six different sales disclosed on May 6, 2021, spanning Live Nation Entertainment (LYV), Block (SQ), Tesla (TSLA), and Uber Technologies (UBER), among others. Other names appearing once in the record include Walt Disney Company (DIS), Expedia Group (EXPE), Keurig Dr Pepper (KDP), Peloton Interactive (PTON), Sweetgreen (SG), and SIFCO Industries (SIF). Where sector data is supplied, Communication Services accounts for 15 transactions, followed by Health Care with 10, Industrials with 9, Consumer Discretionary and Financials with 7 each, Real Estate with 3, Information Technology with 2, and Consumer Staples with 1. A handful of frequently disclosed tickers, including NYSE (12 transactions through February 2019), RADI (11 sales through August 2023), CA (8 transactions through November 2019), and OLO (3 sales through May 2023), carry no company name or sector in the underlying data and are reported here only as disclosed.

No Quantellect Score is currently published for Senator Blumenthal as of the August 21, 2026 scoring date; at that date, 76 members had a score, including 73 of the 537 sitting members.

About This Disclosure Data

This profile is built from transaction disclosures filed under the Stop Trading on Congressional Knowledge Act of 2012 and the Senate's financial disclosure rules. The overwhelming majority of the activity summarized here, 1,223 of 1,304 transactions, is attributed to a spouse rather than to the senator personally; 16 transactions carry no listed attribution and are not attributed to any individual. Amounts reflect disclosed ranges, not exact values. The data should be read as transaction-level filings, and the transaction date for an entry should not be confused with the date on which the filing was disclosed. For official filing details, see the Senate Select Committee on Ethics financial disclosure guidance.