MRK Merck & Co., Inc.

NYSE
$143.93

Merck & Co., Inc. (MRK) Insider Activity

What the officers, directors and large holders did with their own shares. Only open-market purchases and sales count toward the totals — grants, option exercises and shares withheld for tax are compensation mechanics, not decisions, and they're listed separately below.

30D 90D 6M 1Y
Insider signal In line Selling ran in line with MRK's own trailing one-year pace, with 0% of sale value under a prearranged plan.
Cluster activity 0 buyers in the last 30 days 0 buyers in the last 90 days 5 sellers in the last 90 days
Insiders buying
0
0 transactions
Insiders selling
11
35 transactions
Purchases
$0
0 shares
Sales
$72.0M
584,348 shares
Net activity
-$72.0M
purchases less sales

How much of that selling was preplanned? 0% planned / 100% discretionary

10b5-1 plan sales $0 0 transactions · 0 shares
Discretionary sales $72.0M 35 transactions · 584,348 shares

Largest single sale: $10.7M.

Where they traded

Buy Sell Dot area is proportional to transaction value.

No open-market insider purchase on record.

Recent open-market activity

Date Insider Role Action Shares Price Value Held after
Guindo Chirfi EVP, Access, Policy & Comms Sell 10,000 $135.00 $1.4M 36,613 −21.5% of holding
Zachary Jennifer EVP, General Counsel Sell 80,315 $133.46 $10.7M 45,509 −63.8% of holding
DeLuca Richard R. 2 fills EVP&Pres, Merck Animal Heallth Sell 11,699 $131.63 $1.5M 110,767 −9.6% of holding
DeLuca Richard R. 2 fills EVP&Pres, Merck Animal Heallth Sell 12,837 $131.76 $1.7M 127,293 −9.2% of holding
DeLuca Richard R. EVP&Pres, Merck Animal Heallth Sell 20,784 $130.43 $2.7M 134,703 −13.4% of holding
Guindo Chirfi EVP, Access, Policy & Comms Sell 15,000 $131.00 $2.0M 46,613 −24.3% of holding
DeLuca Richard R. 3 fills EVP&Pres, Merck Animal Heallth Sell 6,050 $130.38 $788.8K 160,732 −3.6% of holding
Williams David Michael 3 fills EVP,Chief Info&Digital Officer Sell 52,847 $128.77 $6.8M 31,716 −62.5% of holding
Maraldo David R. 3 fills EVP & Pres. MMD Sell 18,706 $128.72 $2.4M 18,212 −50.7% of holding
Guindo Chirfi Chief Marketing Officer Sell 10,000 $121.46 $1.2M 60,615 −14.2% of holding
Li Dean Y Executive VP & President, MRL Sell 10,235 $117.52 $1.2M 92,035 −10% of holding
Zachary Jennifer 3 fills EVP, General Counsel Sell 121,573 $119.15 $14.5M 68,916 −63.8% of holding
Guindo Chirfi Chief Marketing Officer Sell 10,000 $118.41 $1.2M 70,615 −12.4% of holding
DeLuca Richard R. EVP&Pres, Merck Animal Heallth Sell 37,685 $120.92 $4.6M 160,174 −19% of holding
Oosthuizen Johannes Jacobus President, U.S. Market Sell 15,000 $121.87 $1.8M 21,197 −41.4% of holding
Williams David Michael EVP,Chief Info&Digital Officer Sell 5,000 $121.91 $609.5K 30,838 −14% of holding
Guindo Chirfi Chief Marketing Officer Sell 20,000 $121.88 $2.4M 80,615 −19.9% of holding
Davis Robert M 2 fills Chairman, CEO & President Sell 47,434 $118.04 $5.6M 476,064 −9.1% of holding
Litchfield Caroline EVP & CFO Sell 41,997 $119.61 $5.0M 90,192 −31.8% of holding
Li Dean Y Executive VP & President, MRL Sell 15,087 $118.77 $1.8M 102,270 −12.9% of holding
Smart Dalton E. III 2 fills SVP Fin. - Global Controller Sell 6,400 $119.67 $765.9K 10,605 −37.6% of holding
Downing Cristal N Chief Comm. & Public Afrs Ofcr Sell 7,085 $87.00 $616.4K None left
Williams David Michael EVP,Chief Info&Digital Officer Sell 8,614 $83.59 $720.0K 24,578 −26% of holding

Form 4s are due within two business days of a transaction, so this is close to real time — unlike the quarterly 13F data on the Institutional tab. A single large sale often reflects a prearranged 10b5-1 plan rather than a fresh view, so read a pattern of sales rather than any one of them.