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Merck & Co., Inc. (MRK) S&P 500 DOW 30 XNYS PHARMACEUTICAL PREPARATIONS Net insider selling (90d)
Latest MRK Insider Trades
About Merck & Co., Inc. (MRK) Merck makes pharmaceutical products to treat several conditions in a number of therapeutic areas, including cardiometabolic disease, cancer, and infections. In 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, 53% of the company's 2025 sales were generated from US human health (pharmaceuticals and vaccines).
Headquarters RAHWAY, NJ
Employees 75,000
Listed 1949
Exchange XNYS https://www.merck.com SEC filings for MRK on EDGAR
90-Day SEC Filing Activity Form 4 transaction type Transactions Shares Total value Open-market sale 17 228,238 $29.98M Grant or award 15 22,660 Option exercise 16 252,960
MRK Insider Transactions (Form 4) 65 96 Form 4 filings on record, the earliest from Oct 1, 2024, newest first. Filing history page 1 of 3.
Date Insider Transaction Security Shares Price Value Aug 13, 2026 CG Chirfi Guindo - Officer Open-market sale Common Stock 10,000
Recent MRK Form 8-K Filings 4
Recent MRK Form 144 Notices of Proposed Sale 3 A Form 144 is notice of an INTENDED sale, not a completed one. It often precedes the Form 4 that reports the trade actually happening.
Filed Filer Relationship Shares Market value Notice Aug 13, 2026 CHIRFI GUINDO Officer 10,000 $1.35M View on EDGAR Aug 12, 2026 JENNIFER L ZACHARY Officer
MRK Insider Trading - FAQ
What is the latest insider trade for MRK? Merck & Co., Inc. (MRK) had 22 insider filings in the last 90 days, with the most recent on 2026-08-13. The full record for MRK runs to 96 Form 4 filings, the earliest from 2024-10-01. InsiderAlpha tracks every Form 4, Form 144, and 8-K filing in real time.
How many insiders are buying MRK stock? No insider purchases of MRK were filed in the last 90 days.
How many insiders are selling MRK stock? 17 insider sales of MRK were filed in the last 90 days, totaling $29.98M.
Where can I see MRK SEC filings (Form 4, 10-K, 10-Q, 8-K)? This page tracks MRK Form 4 insider transactions, Form 144 sale notices, and 8-K material event disclosures in one timeline. Annual 10-K and quarterly 10-Q reports live on the company's SEC EDGAR page.
How can I follow MRK insider buys? Create a free InsiderAlpha account and press Watch on this page to add MRK to your watchlist. A free account also opens the full scored daily plan with every past day and 3 months of price history. No card is required. Sign up at https://insideralpha.ai/register.
More Health Care Companies with Insider Activity Every Form 4 below links to the original document on SEC EDGAR, so the numbers on this page can be checked against the filing they came from.
Related Companies - Recent Insider Activity What is SEC Form 4? The filing insiders must submit within two business days of a trade, and how to read its transaction codes. Track MRK insider activity as it files Real-time Form 4 alerts, AI-scored daily trade ideas and 10b5-1 plan flags.
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Market cap $366.00B
P/E ratio 117.70
Dividend yield 2.29%
Average volume 10.87M
52 week high $156.92
52 week low $77.58
Today's high $149.01
Today's low $145.75
Open $146.72
Volume 8.07M
Previous close $149.54
Shares outstanding 2.47B Market cap
$366.00B
75,000 employees
MRK Insider Sentiment - Last 90 Days Share of open-market insider dollar volume that was buying versus selling, from SEC Form 4 filings.
0% Buying 100% Selling
0 insider purchases totaling $0 against 17 sales totaling $29.98M.
Most-Active MRK Insiders - Last 90 Days 10 Dollar totals are shown for open-market purchases and sales only. Grants, option exercises, gifts and tax withholding are reported by share count because they are not trades at a market price.
Aug 12, 2026 JZ Jennifer Zachary - Officer Option exercise Common Stock 41,494 $117.89 $4.89M
Aug 12, 2026 JZ Jennifer Zachary - Officer Option exercise Common Stock 13,433 $84.71 $1.14M
Aug 12, 2026 JZ Jennifer Zachary - Officer Open-market sale Common Stock 80,315 $133.46 $10.72M
Aug 12, 2026 JZ Jennifer Zachary - Officer Option exercise Stock Option (Right to Buy) 41,494 $0.00 -
Aug 12, 2026 JZ Jennifer Zachary - Officer Option exercise Stock Option (Right to Buy) 13,433 $0.00 -
Aug 10, 2026 RD Richard R. Deluca - Officer Open-market sale Common Stock 20,784 $130.43 $2.71M
Aug 11, 2026 RD Richard R. Deluca - Officer Open-market sale Common Stock 7,410 $131.33 $973K
Aug 11, 2026 RD Richard R. Deluca - Officer Open-market sale Common Stock 5,427 $132.35 $718K
Aug 12, 2026 RD Richard R. Deluca - Officer Open-market sale Common Stock 11,099 $131.61 $1.46M
Aug 6, 2026 RD Richard R. Deluca - Officer Open-market sale Common Stock 4,945 $130.23 $644K
Aug 5, 2026 DM David R. Maraldo - Officer Option exercise Common Stock 6,311 $73.73 $465K
Aug 5, 2026 DM David R. Maraldo - Officer Open-market sale Common Stock 6,311 $128.72 $812K
Aug 5, 2026 DM David R. Maraldo - Officer Option exercise Common Stock 9,709 $87.10 $846K
Aug 5, 2026 DM David R. Maraldo - Officer Open-market sale Common Stock 9,709 $128.72 $1.25M
Aug 5, 2026 DM David R. Maraldo - Officer Option exercise Common Stock 2,686 $84.71 $228K
Aug 5, 2026 DM David R. Maraldo - Officer Open-market sale Common Stock 2,686 $128.72 $346K
Aug 5, 2026 DM David R. Maraldo - Officer Option exercise Stock Option (Right to Buy) 6,311 $0.00 -
Aug 5, 2026 DM David R. Maraldo - Officer Option exercise Stock Option (Right to Buy) 9,709 $0.00 -
Aug 5, 2026 DM David R. Maraldo - Officer Option exercise Stock Option (Right to Buy) 2,686 $0.00 -
Aug 6, 2026 CG Chirfi Guindo - Officer Open-market sale Common Stock 15,000 $131.00 $1.97M
Jun 30, 2026 MC Mary Ellen Coe - Director Grant or award Phantom Stock 233.46 $128.50 $30K
May 29, 2026 KW Kathy J. Warden - Director Grant or award Phantom Stock 1,853 $118.72 $220K
May 29, 2026 MC Mary Ellen Coe - Director Grant or award Phantom Stock 1,853 $118.72 $220K
May 29, 2026 IT Inge G. Thulin - Director Grant or award Phantom Stock 1,853 $118.72 $220K
May 29, 2026 PR Patricia F. Russo - Director Grant or award Phantom Stock 1,853 $118.72 $220K
May 29, 2026 PR Paul Rothman - Director Grant or award Phantom Stock 1,853 $118.72 $220K
May 29, 2026 SM Stephen Mayo - Director Grant or award Phantom Stock 1,853 $118.72 $220K
May 29, 2026 TG Thomas H. Glocer - Director Grant or award Phantom Stock 1,853 $118.72 $220K
May 29, 2026 PC Pamela J. Craig - Director Grant or award Phantom Stock 1,853 $118.72 $220K
May 5, 2026 JZ Jennifer Zachary - Officer Grant or award Restricted Stock Unit 12,064 $0.00 -
May 5, 2026 JZ Jennifer Zachary - Officer Grant or award Stock Option (Right to Buy) 35,312 $0.00 -
May 5, 2026 CL Caroline Litchfield - Officer Grant or award Stock Option (Right to Buy) 46,566 $0.00 -
May 5, 2026 DL Dean Y. Li - Officer Grant or award Restricted Stock Unit 19,885 $0.00 -
May 5, 2026 DL Dean Y. Li - Officer Grant or award Stock Option (Right to Buy) 58,207 $0.00 -
May 5, 2026 BL Betty D. Larson - Officer Grant or award Restricted Stock Unit 7,954 $0.00 -
May 5, 2026 BL Betty D. Larson - Officer Grant or award Stock Option (Right to Buy) 23,283 $0.00 -
May 5, 2026 RD Richard R. Deluca - Officer Grant or award Restricted Stock Unit 11,931 $0.00 -
May 5, 2026 RD Richard R. Deluca - Officer Grant or award Stock Option (Right to Buy) 34,924 $0.00 -
May 5, 2026 RD Robert M. Davis - Officer Grant or award Restricted Stock Unit 47,724 $0.00 -
May 5, 2026 RD Robert M. Davis - Officer Grant or award Stock Option (Right to Buy) 139,697 $0.00 -
May 5, 2026 BF Brian Foard - Officer Grant or award Restricted Stock Unit 10,605 $0.00 -
May 5, 2026 BF Brian Foard - Officer Grant or award Restricted Stock Unit 35,351 $0.00 -
May 5, 2026 BF Brian Foard - Officer Grant or award Stock Option (Right to Buy) 31,044 $0.00 -
Aug 12, 2026 RICHARD ROBERT DELUCA JR Officer 11,699 $1.54M View on EDGAR
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