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Merck & Co., Inc.
Pharmaceutical Preparations · NJ · CIK 310158
Merck & Co., Inc. delivers innovative health solutions through prescription medicines, vaccines, and animal health products
⚡ Elevated coverage
$294.03B
Market cap
$129.38
Last close
+0.6%
1D
+12.0%
5D
9.6M
Volume
Price · last 39 sessions+14.4%
May 4L $111.28 · H $129.38Jun 29
175
Total filings
Jun 24, 2026
Last filing
12/31
Fiscal year end
10-K10-K FOR THE FISCAL YEAR ENDED DECEMBER 31, 2025Feb 24, 202610-K10-K FOR THE FISCAL YEAR ENDED DECEMBER 31, 2024Feb 25, 202510-K10-KFeb 26, 202410-K10-KFeb 24, 202310-K10-KFeb 25, 202210-K10-KFeb 25, 202110-K10-KFeb 26, 202010-K2018 FORM 10-KFeb 27, 2019
Insider Activity
In the 90 days to Feb 12, 2026: 9 sold $40.7M.
| Date | Insider | Action | Shares | Price | Value |
|---|---|---|---|---|---|
| Feb 12, 2026 | Guindo ChirfiChief Marketing Officer | Sell | 10,000 | $121.46 | $1.2M |
| Feb 10, 2026 | Li Dean YExecutive VP & President, MRL | Sell | 10,235 | $117.52 | $1.2M |
| Feb 9, 2026 | Zachary JenniferEVP, General Counsel | Sell | 56,792 | $119.15 | $6.8M |
| Feb 9, 2026 | Zachary JenniferEVP, General Counsel | Sell | 38,835 | $119.15 | $4.6M |
| Feb 9, 2026 | Zachary JenniferEVP, General Counsel | Sell | 25,946 | $119.15 | $3.1M |
| Feb 9, 2026 | Guindo ChirfiChief Marketing Officer | Sell | 10,000 | $118.41 | $1.2M |
| Feb 6, 2026 | Deluca Richard R.EVP&Pres, Merck Animal Heallth | Sell | 37,685 | $120.92 | $4.6M |
| Feb 6, 2026 | Oosthuizen Johannes JacobusPresident, U.S. Market | Sell | 15,000 | $121.87 | $1.8M |
| Feb 6, 2026 | Williams David MichaelEVP,Chief Info&Digital Officer | Sell | 5,000 | $121.91 | $610K |
| Feb 5, 2026 | Guindo ChirfiChief Marketing Officer | Sell | 20,000 | $121.88 | $2.4M |
| Feb 4, 2026 | Litchfield CarolineEVP & CFO | Sell | 41,997 | $119.61 | $5.0M |
| Feb 4, 2026 | Davis Robert MChairman, CEO & President | Sell | 32,462 | $118.35 | $3.8M |
| Feb 4, 2026 | Li Dean YExecutive VP & President, MRL | Sell | 15,087 | $118.77 | $1.8M |
| Feb 4, 2026 | Davis Robert MChairman, CEO & President | Sell | 14,972 | $117.38 | $1.8M |
| Feb 4, 2026 | Smart Dalton E. IiiSVP Fin. - Global Controller | Sell | 4,000 | $119.68 | $479K |
| Feb 4, 2026 | Smart Dalton E. IiiSVP Fin. - Global Controller | Sell | 2,400 | $119.68 | $287K |
| Nov 10, 2025 | Downing Cristal NChief Comm. & Public Afrs Ofcr | Sell | 7,085 | $87.00 | $616K |
| Nov 3, 2025 | Williams David MichaelEVP,Chief Info&Digital Officer | Sell | 8,614 | $83.59 | $720K |
Open-market buys & sells (Form 4, transaction codes P/S). Source: SEC structured insider data.
What Changed
Risk factors · Feb 25, 2025 → Feb 24, 202638 added · 26 removed between the two most recent 10-Ks. The risks a company starts — or stops — disclosing are often the story.
Newly disclosed
- As previously disclosed, while two patents in the Keytruda composition of matter patent family expire in May and November of 2029, respectively, the Company expects these patents to be the subject of litigation and, thus, biosimilar competition could begin in December 2028 when the primary compound patent expires.
- These evolving regulatory requirements may result in increased costs and complexities of compliance in order to collect, measure and report on the relevant information, and could expose the Company to the risk of government enforcement actions and private litigation. 33 Table of Contents Failure to attract and retain highly qualified personnel could affect the Company’s ability to successfully develop and commercialize products.
- Unauthorized use of open-source AI tools or generative AI platforms by employees or third parties could result in inadvertent disclosure of confidential information, intellectual property leakage, or regulatory violations.
- The Company expects a significant decline in sales of Januvia in the first half of 2026 reflecting the impact of government price setting noted above and subsequently, following loss of market exclusivity in May 2026, the Company anticipates it will lose nearly all U.S. sales of Januvia and Janumet .
- Also, as noted above, in December 2025, the Company entered into the MFN Agreement with the U.S. government pursuant to which the Company will provide key products through a direct-to-patient program at affordable prices for eligible patients in the U.S.
- The Company will not resume shipments until inventory levels return to normal levels and it cannot predict when shipments to China will resume nor the levels of sales that the Company will achieve and as a result, the Company expects that sales of Gardasil/Gardasil 9 in China will not materially increase in 2026.
- There may, however, be attempts by one or more companies to challenge the patent or launch a biosimilar product despite the patent in some European jurisdictions following the expiration of data exclusivity in Europe in July 2026.
- Due to above normal inventory levels at the Company’s commercialization partner in China, the Company made a decision to pause shipments to China beginning in February 2025 and has not resumed shipments to date.
- In addition, in January 2026, HHS announced that Lenvima has been selected for government price setting, the set price for which will become effective on January 1, 2028.
- In addition, in January 2026, HHS announced that Lenvima has been selected for government price setting, the set price for which will become effective on January 1, 2028.
- Bridion will lose market exclusivity in the U.S. in July 2026 at which time the Company anticipates a significant and rapid decline in U.S. sales of Bridion .
- In addition, Januvia and Janumet will lose market exclusivity in the U.S. in May 2026 and Janumet XR will lose market exclusivity in the U.S. in July 2026.
No longer disclosed
- Bridion will lose market exclusivity in the U.S. in 2026 (subject to patent litigation discussed below) and the Company expects that sales of Bridion in the U.S. will decline substantially thereafter.
- For example, the Company is currently experiencing manufacturing delays related to Varivax and ProQuad which will result in supply constraints in 2025.
- In addition, the Company expects U.S. sales of Keytruda to decline beginning in January 2028 upon implementation of government pricing under the IRA, and to further decline upon loss of market exclusivity following expiration of the U.S. compound patent in December 2028.
- There may, however, be attempts by one or more companies to challenge the patent or launch a biosimilar product despite the patent in some European jurisdictions following the expiration of data exclusivity in Europe in July 2026. 28 Table of Content s Key products generate a significant amount of the Company’s profits and cash flows, and any events that adversely affect the markets for its leading products could have a material adverse effect on the Company’s results of operations and financial condition.
- Therefore, the Company made a decision to temporarily pause shipments to China beginning in February 2025 through at least the middle of the year and as a result, combined sales of G ardasil/Gardasil 9 will decline significantly in 2025 compared with 2024.
- The Company lost market exclusivity for Bridion in Europe and Japan in 2023 and 2024, respectively, and the Company has experienced a substantial decline in Bridion sales in those markets.
- Beginning in mid-2024, the Company observed a significant decline in shipments from its distributor and commercialization partner in China, Chongqing Zhifei Biological Products Co., Ltd.
- Lower demand in China persisted and, at the end of 2024, overall channel inventory levels in China remained elevated at above normal levels.
- In 2024, the Company’s oncology portfolio, led by Keytruda , represented substantially all of the Company’s revenue growth.
- It is too early for the 31 Table of Content s Company to assess if, or to what extent, such policies will be implemented or continue to be implemented, and the extent of any measures that have been or will be taken by any impacted countries.
- These regulations, which may differ across jurisdictions, could result in the Company being subject to new or expanded carbon pricing or taxes, increased compliance costs, restrictions on GHG emissions, investment in new technologies, increased GHG emission disclosure (including costs resulting from mandatory or voluntary reporting, diligence or disclosure) and transparency, recurring investments in data gathering and reporting systems, upgrades of facilities to meet new building codes, and the redesign of utility systems, which could increase the Company’s operating costs, including the cost of electricity and energy used by the Company.
- The FDA and foreign regulatory authorities, including in the EU, Japan and China, have substantial discretion to require additional testing, to delay or withhold registration and marketing approval and to otherwise preclude distribution and sale of a product. 36 Table of Content s Even if the Company is successful in developing new products, it will not be able to market any of those products unless and until it has obtained all required regulatory approvals (which in limited circumstances may include authorizations for emergency use) in each jurisdiction where it proposes to market the new products.
In the News
⚡ Elevated coverageCoverage (30d): 3 reputable articles · skews ▲ positive.
MarketWatchMerck & Co. Inc. stock underperforms Monday when compared to competitors14d agoMarketWatchMerck & Co. Inc. stock underperforms Friday when compared to competitors17d agoMarketWatchMerck & Co. Inc. stock underperforms Tuesday when compared to competitors1mo ago
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