Merck & Co., Inc. $(MRK)$ is currently at $148.10, up $12.93 or 9.56%

--Would be new all-time closing high (Based on available data back to Jan. 21, 1972)

--On pace for largest percent increase since Aug. 5, 2016, when it rose 10.41%

--Currently up five of the past six days

--Up 13.74% month-to-date

--Up 40.69% year-to-date

--Up 74.93% from 52 weeks ago (Aug. 20, 2025), when it closed at $84.66

--Would be a new 52-week closing high

--Up 90.84% from its 52-week closing low of $77.60 on Sept. 25, 2025

--Traded as high as $149.26; new all-time intraday high (Based on available data back to Jan. 21, 1972)

--Up 10.42% at today's intraday high; largest intraday percent increase since Oct. 1, 2021, when it rose as much as 12.29%

--Best performer in the DJIA today

--Fourth best performer in the S&P 500 today

--Sixth most active stock in the S&P 500 today

--Contributed 76.82 points to the DJIA so far today

All data as of 9:44:04 AM ET

Source: Dow Jones Market Data, FactSet