| 2020-10-05 | Davis Robert M | EVP, Global Svcs & CFO | Sale+OE | 251,273 | $81.03 | $20,360,324.54 | -59.5% | → |
| 2020-08-13 | Chattopadhyay Sanat | Exe V-P & Pres. MMD | Sell | 10,380 | $83.01 | $861,675.98 | -13.3% | → |
| 2020-08-05 | Clyburn Frank | EVP, Chief Commercial Officer | Sale+OE | 18,876 | $81.55 | $1,539,273.62 | -18.9% | → |
| 2020-07-17 | Gerberding Julie L. | EVP Strat Comm, GI Pub Policy | Sale+OE | 36,285 | $80.00 | $2,902,976.29 | -33.7% | → |
| 2020-05-07 | BRUN LESLIE A | Director | Sale+OE | 5,000 | $75.46 | $377,300.00 | -72.0% | → |
| 2020-05-07 | WEEKS WENDELL P | Director | Sale+OE | 5,000 | $76.02 | $380,103.50 | -98.0% | → |
| 2020-01-13 | Gerberding Julie L. | EVP Strat Comm, GI Pub Policy | Sale+OE | 102,073 | $89.34 | $9,118,864.98 | -73.4% | → |
| 2019-08-09 | DeLuca Richard R. | EVP&Pres, Merck Animal Heallth | Sale+OE | 38,126 | $85.02 | $3,241,638.70 | -21.0% | → |
| 2019-06-25 | Davis Robert M | EVP, Global Svcs & CFO | Sale+OE | 216,718 | $85.43 | $18,514,031.80 | -41.8% | → |
| 2019-05-07 | Clyburn Frank | EVP, Chief Commercial Officer | Sale+OE | 25,000 | $77.73 | $1,943,182.50 | -27.0% | → |
| 2019-05-03 | DeLuca Richard R. | EVP&Pres, Merck Animal Heallth | Sale+OE | 35,000 | $80.00 | $2,800,000.00 | -33.0% | → |
| 2019-04-08 | Merck & Co., Inc. | 10% Owner | Buy | 4,121,683 | $16.00 | $65,946,928.00 | +46.7% | → |
| 2019-03-25 | Davis Robert M | EVP, Global Svcs & CFO | Sale+OE | 192,572 | $82.38 | $15,863,118.50 | -58.3% | → |
| 2019-03-20 | FRAZIER KENNETH C | Chairman, President & CEO | Sale+OE | 192,736 | $82.05 | $15,813,372.04 | -19.5% | → |
| 2019-03-13 | FRAZIER KENNETH C | Chairman, President & CEO | Sale+OE | 18,725 | $82.00 | $1,535,453.75 | -2.3% | → |
| 2019-03-05 | FRAZIER KENNETH C | Chairman, President & CEO | Sale+OE | 20,105 | $82.00 | $1,648,684.00 | -1.2% | → |
| 2019-02-22 | FRAZIER KENNETH C | Chairman, President & CEO | Sale+OE | 95,953 | $80.01 | $7,677,541.11 | -6.5% | → |
| 2019-02-19 | FRAZIER KENNETH C | Chairman, President & CEO | Sale+OE | 135,613 | $80.03 | $10,853,105.55 | -8.9% | → |
| 2019-02-14 | Karachun Rita A | Sr. VP Fince-Global Controller | Sale+OE | 64,662 | $78.96 | $5,105,950.77 | -80.0% | → |
| 2019-02-13 | WEEKS WENDELL P | Director | Sale+OE | 5,000 | $78.71 | $393,547.50 | -98.0% | → |
| 2019-02-12 | Chattopadhyay Sanat | Exe V-P & Pres. MMD | Sale+OE | 73,727 | $78.62 | $5,796,306.15 | -58.9% | → |
| 2019-02-08 | BRUN LESLIE A | Director | Sale+OE | 3,052 | $77.22 | $235,680.63 | -61.0% | → |
| 2019-02-05 | FRAZIER KENNETH C | Chairman, President & CEO | Sale+OE | 231,566 | $78.08 | $18,079,654.39 | -25.1% | → |
| 2019-02-04 | GLOCER THOMAS H | Director | Sale+OE | 10,000 | $75.96 | $759,590.00 | -66.2% | → |
| 2018-11-08 | PERLMUTTER ROGER M | Exe V-P & Pres, MRL | Sale+OE | 225,443 | $75.27 | $16,967,967.40 | -61.4% | → |
| 2018-11-07 | Gerberding Julie L. | EVP Strat Comm, Gl Pub Policy | Sale+OE | 36,218 | $75.14 | $2,721,348.08 | -43.9% | → |
| 2018-11-01 | Schechter Adam H | EVP & Pres-Global Human Health | Sale+OE | 277,879 | $73.81 | $20,510,945.05 | -65.7% | → |
| 2018-10-31 | Watson Ashley | SVP Chief Ethics & Com Officer | Sale+OE | 47,036 | $74.33 | $3,496,157.66 | -82.8% | → |
| 2018-10-30 | DeLuca Richard R. | EVP&Pres, Merck Animal Health | Sale+OE | 25,467 | $72.00 | $1,833,738.60 | -31.0% | → |
| 2018-10-02 | FRAZIER KENNETH C | Chairman, President & CEO | Sale+OE | 279,850 | $72.07 | $20,168,257.79 | -28.8% | → |
| 2018-10-01 | Merck & Co., Inc. | 10% Owner | Buy | 666,666 | $15.00 | $9,999,990.00 | +32.4% | → |
| 2018-09-18 | FRAZIER KENNETH C | Chairman, President & CEO | Sale+OE | 279,851 | $70.08 | $19,611,818.15 | -28.8% | → |
| 2018-09-17 | Schechter Adam H | EVP & Pres-Global Human Health | Sale+OE | 107,360 | $70.18 | $7,534,290.82 | -66.0% | → |
| 2018-08-03 | Chattopadhyay Sanat | Exe V-P & Pres. MMD | Sale+OE | 29,208 | $65.20 | $1,904,361.60 | -36.2% | → |
| 2018-08-02 | Karachun Rita A | Sr. VP Fince-Global Controller | Sell | 5,000 | $65.01 | $325,040.00 | -23.6% | → |
| 2018-07-31 | FRAZIER KENNETH C | Chairman, President & CEO | Sale+OE | 228,091 | $65.00 | $14,826,690.51 | -24.3% | → |
| 2018-06-18 | Schechter Adam H | EVP & Pres-Global Human Health | Sale+OE | 134,094 | $61.00 | $8,179,945.14 | -68.1% | → |
| 2018-05-15 | Gerberding Julie L. | EVP Strat Comm, Gl Pub Policy | Sell | 9,972 | $59.66 | $594,963.42 | -17.9% | → |
| 2018-04-16 | GRADDICK WEIR MIRIAN M | Exe V-P, HR | Sell | 24,000 | $58.00 | $1,392,000.00 | -23.0% | → |
| 2018-02-09 | WEEKS WENDELL P | Director | Sale+OE | 5,000 | $53.57 | $267,833.00 | -98.0% | → |
| 2018-01-16 | Schechter Adam H | EVP & Pres-Global Human Health | Sale+OE | 50,994 | $61.63 | $3,142,760.22 | -100% | → |