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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 manufacturer focused on prescription medicines, vaccines, and biologic therapies, with major franchises in oncology, infectious diseases, and animal health. Its cancer immunotherapy Keytruda is one of the world’s highest‑selling drugs and a primary driver of revenue growth. I...

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

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

13 members of Congress have disclosed 40 trades in Merck & Co., Inc. (MRK), a Healthcare company. The buy/sell breakdown shows 17 purchases versus 20 sales, indicating net selling pressure from lawmakers. All data is sourced from STOCK Act periodic transaction reports filed with Congress.

Total Disclosures
40
Unique Politicians
13
Buys
17
Sells
20

Who in Congress Is Trading MRK?

DatePoliticianTypeAmountSecurity
2009-08-08F. JAMES SENSENBRENNERsell$50K – $100KStock
2009-07-05JANE HARMANsell$15K – $50KStock

Related

All stocks traded by CongressFull trade feedMost active tradersAbout the STOCK ActReport missing trade
2009-06-04JANE HARMANsell$1K – $15KStock
2009-03-11HARRY TEAGUEbuy$1K – $15KStock
2009-02-11F. JAMES SENSENBRENNERbuy$6,426.00Stock
2008-07-10Vern Buchananbuy$1K – $15KStock
2008-06-03MICHAEL T. MCCAULsell—Stock
2008-06-03MICHAEL T. MCCAULbuy—Stock
2008-03-10JANE HARMANbuy$1K – $15KStock
2008-03-10JANE HARMANsell$1K – $15KStock
2008-03-09F. JAMES SENSENBRENNERsell—Stock
2008-03-09F. JAMES SENSENBRENNERexchange—Stock
2008-03-09F. JAMES SENSENBRENNERexchange—Stock
2008-03-09F. JAMES SENSENBRENNERexchange—Stock
2008-03-01MICHAEL T. MCCAULsell—Stock
2008-03-01MICHAEL T. MCCAULbuy—Stock
2008-02-10Vern Buchanansell$1K – $15KStock
2008-02-01Vern Buchananbuy$1K – $15KStock
2007-10-07Vern Buchananbuy$1K – $15KStock
2007-10-01Vern Buchananbuy$1K – $15KStock
2007-09-01JANE HARMANbuy$15K – $50KStock
2007-09-01Vern Buchananbuy$1K – $15KStock
2007-07-08MICHAEL T. MCCAULsell$24,298.63Stock
2007-06-11JANE HARMANbuy$50K – $100KStock
2007-06-02Vern Buchanansell$1K – $15KStock
2007-05-07Rodney P. Frelinghuysensell$50K – $100KStock
2007-03-04MICHAEL T. MCCAULbuy$26,172.75Stock
2007-03-04MICHAEL T. MCCAULbuy$26,172.75Stock
2007-02-12Rubén Hinojosasell$1K – $15KStock
2007-02-05MICHAEL T. MCCAULsell$28,145.55Stock
2006-09-08Lamar Smithbuy$911.50Stock
2006-06-07Eric Cantorsell$15K – $50KStock
2005-07-10Vern Buchananbuy$1K – $15KStock
2004-08-11John D. Dingellsell$1K – $15KStock
2004-02-08Lamar Smithbuy$939.70Stock
2003-05-12Lou Barlettasell$1K – $15KStock
2003-05-12Lou Barlettasell$1K – $15KStock
2002-05-09MICHAEL T. MCCAULsell$15K – $50KStock
2002-03-12KATHY CASTORsell$1K – $15KStock
2001-06-11NAN A. S. HAYWORTHsell$1K – $15KStock
F. JAMES SENSENBRENNERsell
2009-08-08$50K – $100K
Stock
JANE HARMANsell
2009-07-05$15K – $50K
Stock
JANE HARMANsell
2009-06-04$1K – $15K
Stock
HARRY TEAGUEbuy
2009-03-11$1K – $15K
Stock
F. JAMES SENSENBRENNERbuy
2009-02-11$6,426.00
Stock
Vern Buchananbuy
2008-07-10$1K – $15K
Stock
MICHAEL T. MCCAULsell
2008-06-03—
Stock
MICHAEL T. MCCAULbuy
2008-06-03—
Stock
JANE HARMANbuy
2008-03-10$1K – $15K
Stock
JANE HARMANsell
2008-03-10$1K – $15K
Stock
F. JAMES SENSENBRENNERsell
2008-03-09—
Stock
F. JAMES SENSENBRENNERexchange
2008-03-09—
Stock
F. JAMES SENSENBRENNERexchange
2008-03-09—
Stock
F. JAMES SENSENBRENNERexchange
2008-03-09—
Stock
MICHAEL T. MCCAULsell
2008-03-01—
Stock
MICHAEL T. MCCAULbuy
2008-03-01—
Stock
Vern Buchanansell
2008-02-10$1K – $15K
Stock
Vern Buchananbuy
2008-02-01$1K – $15K
Stock
Vern Buchananbuy
2007-10-07$1K – $15K
Stock
Vern Buchananbuy
2007-10-01$1K – $15K
Stock
JANE HARMANbuy
2007-09-01$15K – $50K
Stock
Vern Buchananbuy
2007-09-01$1K – $15K
Stock
MICHAEL T. MCCAULsell
2007-07-08$24,298.63
Stock
JANE HARMANbuy
2007-06-11$50K – $100K
Stock
Vern Buchanansell
2007-06-02$1K – $15K
Stock
Rodney P. Frelinghuysensell
2007-05-07$50K – $100K
Stock
MICHAEL T. MCCAULbuy
2007-03-04$26,172.75
Stock
MICHAEL T. MCCAULbuy
2007-03-04$26,172.75
Stock
Rubén Hinojosasell
2007-02-12$1K – $15K
Stock
MICHAEL T. MCCAULsell
2007-02-05$28,145.55
Stock
Lamar Smithbuy
2006-09-08$911.50
Stock
Eric Cantorsell
2006-06-07$15K – $50K
Stock
Vern Buchananbuy
2005-07-10$1K – $15K
Stock
John D. Dingellsell
2004-08-11$1K – $15K
Stock
Lamar Smithbuy
2004-02-08$939.70
Stock
Lou Barlettasell
2003-05-12$1K – $15K
Stock
Lou Barlettasell
2003-05-12$1K – $15K
Stock
MICHAEL T. MCCAULsell
2002-05-09$15K – $50K
Stock
KATHY CASTORsell
2002-03-12$1K – $15K
Stock
NAN A. S. HAYWORTHsell
2001-06-11$1K – $15K
Stock
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