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MRK

Merck & Co., Inc.

Pharmaceutical Preparations

$146.87updated Sep 19, 2026

Congressional trading profile for Merck & Co., Inc. (MRK), covering 41 disclosed transactions by 18 lawmakers.

Merck makes pharmaceutical products to treat several conditions in a number of therapeutic areas, including cardiometabolic disease, cancer, and infections. Within cancer, the firm's immuno-oncology platform, led by Keytruda, is a major contributor to overall sales. The company also has a substantial vaccine business aimed at preventing pediatric diseases, as well as Gardasil for human papillomavirus. Additionally, Merck sells animal health-related drugs. From a geographical perspective, 47% of the company's sales are generated from US human health (pharmaceuticals and vaccines).

Total Trades

41

Politicians Trading

18

Last Traded

Aug 24, 2026

Price history

Congressional Trades

PartyDemocratRepublican
ChamberHouseSenate
TypeBuySell
PoliticianNotifiedTradedTypeAmountChange
Maria Elvira SalazarRSep 9, 2026Aug 19, 2026Buy$15,001 - $50,000-3.50%
Maria Elvira SalazarRSep 9, 2026Aug 19, 2026Buy$15,001 - $50,000-3.50%
Ro KhannaDSep 4, 2026Aug 24, 2026Buy$1,001 - $15,000-2.52%
Ro KhannaDSep 4, 2026Aug 7, 2026Buy$15,001 - $50,000+14.22%
Ro KhannaDAug 7, 2026Jul 8, 2026Buy$1,001 - $15,000+16.57%
Alan ArmstrongRJul 21, 2026Mar 27, 2026Sell$15,001 - $50,000+22.77%
Julie JohnsonDJan 15, 2026Dec 18, 2025Sell$1,001 - $15,000+45.86%
Gilbert Ray Cisneros, Jr.DJan 12, 2026Dec 19, 2025Buy$1,001 - $15,000+45.29%
Gilbert Ray Cisneros, Jr.DDec 15, 2025Nov 18, 2025Buy$1,001 - $15,000+52.31%
Julie JohnsonDDec 11, 2025Nov 13, 2025Sell$1,001 - $15,000+58.04%
Val T. HoyleDOct 10, 2025Sep 23, 2025Sell$1,001 - $15,000+83.68%
Sheri BiggsROct 5, 2025Mar 19, 2025Sell$15,001 - $50,000+56.21%
Gilbert Ray Cisneros, Jr.DSep 12, 2025Aug 5, 2025Buy$1,001 - $15,000+81.79%
Lisa C. McClainRSep 12, 2025Aug 4, 2025Sell$1,001 - $15,000+83.91%
Julie JohnsonDSep 11, 2025Aug 14, 2025Sell$1,001 - $15,000+77.46%
Marjorie Taylor GreeneRAug 29, 2025Aug 28, 2025Buy$1,001 - $15,000+76.51%
Ritchie TorresDAug 20, 2025Jul 11, 2025Sell$1,001 - $15,000+76.19%
Lisa C. McClainRAug 13, 2025Jun 24, 2025Buy$1,001 - $15,000+82.86%
C. Scott FranklinRJul 14, 2025Jun 16, 2025Sell$1,001 - $15,000+81.41%
Julie JohnsonDJul 14, 2025Jun 13, 2025Buy$1,001 - $15,000+79.75%
Gilbert Ray Cisneros, Jr.DJun 6, 2025May 30, 2025Sell$1,001 - $15,000+91.14%
Robert BresnahanRMay 31, 2025May 15, 2025Sell$15,001 - $50,000+96.35%
Bruce WestermanRMay 12, 2025Apr 21, 2025Sell$1,001 - $15,000+88.66%
Jefferson ShreveRMay 8, 2025Apr 17, 2025Sell$15,001 - $50,000+88.29%
Robert BresnahanRMay 8, 2025Apr 8, 2025Buy$15,001 - $50,000+86.03%
Marjorie Taylor GreeneRMay 6, 2025May 5, 2025Buy$1,001 - $15,000+77.29%
Gilbert Ray Cisneros, Jr.DMay 6, 2025Apr 29, 2025Buy$1,001 - $15,000+73.38%
Bruce WestermanRApr 16, 2025Mar 3, 2025Buy$1,001 - $15,000+57.67%
Marjorie Taylor GreeneRApr 11, 2025Apr 9, 2025Buy$1,001 - $15,000+79.31%
Kelly MorrisonDApr 11, 2025Mar 20, 2025Sell$1,001 - $15,000+55.04%
Gilbert Ray Cisneros, Jr.DApr 7, 2025Mar 31, 2025Sell$15,001 - $50,000+63.63%
Robert BresnahanRMar 27, 2025Feb 25, 2025Sell$15,001 - $50,000+60.64%
Jefferson ShreveRMar 9, 2025Feb 24, 2025Buy$15,001 - $50,000+60.92%
Gilbert Ray Cisneros, Jr.DMar 6, 2025Feb 26, 2025Buy$15,001 - $50,000+64.32%
Julie JohnsonDFeb 12, 2025Jan 17, 2025Buy$1,001 - $15,000+49.99%
Gilbert Ray Cisneros, Jr.DFeb 11, 2025Jan 24, 2025Sell$1,001 - $15,000+53.71%
Josh GottheimerDFeb 10, 2025Jan 27, 2025Sell$15,001 - $50,000+49.96%
Byron DonaldsRFeb 10, 2025Jan 16, 2025Sell$1,001 - $15,000+45.85%
Byron DonaldsRFeb 10, 2025Jan 16, 2025Sell$1,001 - $15,000+45.85%
Jared MoskowitzDFeb 10, 2025Jan 15, 2025Sell$1,001 - $15,000+46.74%
Jared MoskowitzDFeb 10, 2025Jan 15, 2025Sell$1,001 - $15,000+46.74%