MRK

Merck & Co., Inc. (MRK) stock in 2026, day by day

+40.0% this year101 up days, 96 downbest +12.6% Aug 19worst −3.9% Apr 21

Move

Direction

Days

Shade

−3.1%−1.6%−0.5%+0.5%+1.6%+3.1%

Jan+4.8%

Feb+12.3%

Mar−2.9%

Apr−9.2%

May+8.7%

Jun+8.2%

Jul+1.3%

Aug+13.5%

Sep−1.7%

Oct+1.4%

Wed, Oct 14$147.37+3.80%

MRK’s best days in 2026

+12.60%Wed, Aug 19
+5.64%Fri, May 22
+4.85%Thu, Jun 4
+4.02%Thu, Jun 25
+3.84%Tue, Aug 25

MRK’s worst days in 2026

−3.88%Tue, Apr 21
−3.51%Mon, Feb 9
−3.50%Thu, Mar 5
−3.49%Mon, Jun 15Ex-dividend, $0.85 a share
−3.30%Mon, Oct 5

Each day is its close against the session before, from Yahoo Finance, not adjusted for dividends. A month’s figure is its sessions compounded. An ordinary day for MRK is 1.0%, the median move over the last year. earnings, ex-dividend. Not investment advice.

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