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Congress Stock Tracker

Tracking congressional stock trades from public STOCK Act Periodic Transaction Reports (PTRs) filed by members of the US House and Senate.

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© 2026 Congress Stock Tracker. Data from public STOCK Act filings.For informational purposes only. Not financial advice.
Stocks
Merck & Co., Inc.

Merck & Co., Inc.MRK

NYSEHealthcarePharmaceuticals$115.62-0.25%

A global pharmaceutical company focused on prescription medicines, vaccines, and biologic therapies, Merck generates a significant share of revenue from its oncology franchise, led by blockbuster immunotherapy Keytruda. The company also maintains a sizable vaccines business and an expanding pipeline in oncology, infectious diseases, and cardiometabolic conditions. Investors monitor patent expiration timelines, clinical trial outcomes, and capital allocation as key drivers of long-term earnings growth.

Market Cap: $285.9B52W Range: $73.31 – $125.14

Congressional Interest in Merck & Co., Inc. (MRK)

18 members of Congress have disclosed 50 trades in Merck & Co., Inc. (MRK), a Healthcare company. The buy/sell breakdown shows 30 purchases versus 20 sales, indicating net buying interest from lawmakers. All data is sourced from STOCK Act periodic transaction reports filed with Congress.

Total Disclosures
50
Unique Politicians
18
Buys
30
Sells
20

Who in Congress Is Trading MRK?

DatePoliticianTypeAmountSecurity
2021-10-06Gus M. Bilirakissell$1K – $15KStock
2021-10-05Diana Harshbargersell$1K – $15KStock

Related

All stocks traded by CongressFull trade feedMost active tradersAbout the STOCK ActReport missing trade
2021-10-04MICHAEL T. MCCAULbuy$1K – $15KStock
2021-10-04MICHAEL T. MCCAULbuy$1K – $15KStock
2021-09-30Diana Harshbargerbuy$1K – $15KStock
2021-09-30Diana Harshbargersell$1K – $15KStock
2021-09-30Diana Harshbargerbuy$1K – $15KStock
2021-09-30ZOE LOFGRENbuy$1K – $15KStock
2021-09-27Diana Harshbargerbuy$1K – $15KStock
2021-09-22Diana Harshbargerbuy$1K – $15KStock
2021-09-16KATHERINE CLARKsell$1K – $15KStock
2021-09-07Diana Harshbargerbuy$1K – $15KStock
2021-09-06Vern Buchanansell$1K – $15KStock
2021-09-03Vern Buchananbuy$1K – $15KStock
2021-08-26Diana Harshbargersell$1K – $15KStock
2021-08-17Thomas Suozzibuy$15K – $50KStock
2021-08-06Vern Buchananbuy$1K – $15KStock
2021-07-28Carol Devine Millersell$15K – $50KStock
2021-07-27KATHERINE CLARKbuy$1K – $15KStock
2021-07-27KATHERINE CLARKbuy$1K – $15KStock
2021-07-19John Curtissell$1K – $15KStock
2021-07-06Vern Buchananbuy$1K – $15KStock
2021-06-02John W Hickenlooperbuy$1K – $15KStock
2021-06-01Vern Buchananbuy$1K – $15KStock
2021-05-25MICHAEL T. MCCAULbuy$50K – $100KStock
2021-05-03MICHAEL T. MCCAULsell$15K – $50KStock
2021-04-09Sara Jacobssell$50K – $100KStock
2021-03-29Thomas H Tubervillesell$1K – $15KStock
2021-03-17William R. Keatingbuy$1K – $15KStock
2021-03-15MICHAEL T. MCCAULbuy$50K – $100KStock
2021-03-10Richard W. Allensell$15K – $50KStock
2021-03-10Richard W. Allensell$15K – $50KStock
2021-03-01Diana Harshbargersell$1K – $15KStock
2021-02-05Kurt Schraderbuy$1K – $15KStock
2021-01-28Peter Meijersell$1K – $15KStock
2021-01-28Peter Meijersell$1K – $15KStock
2021-01-27Diana Harshbargerbuy$1K – $15KStock
2021-01-25Diana Harshbargerbuy$1K – $15KStock
2021-01-22Diana Harshbargerbuy$1K – $15KStock
2021-01-13Peter Meijerbuy$1K – $15KStock
2021-01-05Diana Harshbargerbuy$1K – $15KStock
2021-01-04MICHAEL T. MCCAULbuy$50K – $100KStock
2020-12-15MICHAEL T. MCCAULbuy$1K – $15KStock
2020-11-17KENNY MARCHANTbuy$15K – $50KStock
2020-11-16MICHAEL T. MCCAULsell$15K – $50KStock
2020-11-13MICHAEL T. MCCAULbuy$50K – $100KStock
2020-11-13MICHAEL T. MCCAULsell$50K – $100KStock
2020-11-13MICHAEL T. MCCAULbuy$15K – $50KStock
2020-11-06Tom Malinowskisell$15 – $50Stock
2020-11-06Tom Malinowskisell$15K – $50KStock
Gus M. Bilirakissell
2021-10-06$1K – $15K
Stock
Diana Harshbargersell
2021-10-05$1K – $15K
Stock
MICHAEL T. MCCAULbuy
2021-10-04$1K – $15K
Stock
MICHAEL T. MCCAULbuy
2021-10-04$1K – $15K
Stock
Diana Harshbargerbuy
2021-09-30$1K – $15K
Stock
Diana Harshbargersell
2021-09-30$1K – $15K
Stock
Diana Harshbargerbuy
2021-09-30$1K – $15K
Stock
ZOE LOFGRENbuy
2021-09-30$1K – $15K
Stock
Diana Harshbargerbuy
2021-09-27$1K – $15K
Stock
Diana Harshbargerbuy
2021-09-22$1K – $15K
Stock
KATHERINE CLARKsell
2021-09-16$1K – $15K
Stock
Diana Harshbargerbuy
2021-09-07$1K – $15K
Stock
Vern Buchanansell
2021-09-06$1K – $15K
Stock
Vern Buchananbuy
2021-09-03$1K – $15K
Stock
Diana Harshbargersell
2021-08-26$1K – $15K
Stock
Thomas Suozzibuy
2021-08-17$15K – $50K
Stock
Vern Buchananbuy
2021-08-06$1K – $15K
Stock
Carol Devine Millersell
2021-07-28$15K – $50K
Stock
KATHERINE CLARKbuy
2021-07-27$1K – $15K
Stock
KATHERINE CLARKbuy
2021-07-27$1K – $15K
Stock
John Curtissell
2021-07-19$1K – $15K
Stock
Vern Buchananbuy
2021-07-06$1K – $15K
Stock
John W Hickenlooperbuy
2021-06-02$1K – $15K
Stock
Vern Buchananbuy
2021-06-01$1K – $15K
Stock
MICHAEL T. MCCAULbuy
2021-05-25$50K – $100K
Stock
MICHAEL T. MCCAULsell
2021-05-03$15K – $50K
Stock
Sara Jacobssell
2021-04-09$50K – $100K
Stock
Thomas H Tubervillesell
2021-03-29$1K – $15K
Stock
William R. Keatingbuy
2021-03-17$1K – $15K
Stock
MICHAEL T. MCCAULbuy
2021-03-15$50K – $100K
Stock
Richard W. Allensell
2021-03-10$15K – $50K
Stock
Richard W. Allensell
2021-03-10$15K – $50K
Stock
Diana Harshbargersell
2021-03-01$1K – $15K
Stock
Kurt Schraderbuy
2021-02-05$1K – $15K
Stock
Peter Meijersell
2021-01-28$1K – $15K
Stock
Peter Meijersell
2021-01-28$1K – $15K
Stock
Diana Harshbargerbuy
2021-01-27$1K – $15K
Stock
Diana Harshbargerbuy
2021-01-25$1K – $15K
Stock
Diana Harshbargerbuy
2021-01-22$1K – $15K
Stock
Peter Meijerbuy
2021-01-13$1K – $15K
Stock
Diana Harshbargerbuy
2021-01-05$1K – $15K
Stock
MICHAEL T. MCCAULbuy
2021-01-04$50K – $100K
Stock
MICHAEL T. MCCAULbuy
2020-12-15$1K – $15K
Stock
KENNY MARCHANTbuy
2020-11-17$15K – $50K
Stock
MICHAEL T. MCCAULsell
2020-11-16$15K – $50K
Stock
MICHAEL T. MCCAULbuy
2020-11-13$50K – $100K
Stock
MICHAEL T. MCCAULsell
2020-11-13$50K – $100K
Stock
MICHAEL T. MCCAULbuy
2020-11-13$15K – $50K
Stock
Tom Malinowskisell
2020-11-06$15 – $50
Stock
Tom Malinowskisell
2020-11-06$15K – $50K
Stock
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