Merck & Co., Inc.
MRK- Exchange
- NYSE
- Industry
- Pharmaceutical Preparations
- SEC CIK
- 0000310158
In the last 90 days, Merck & Co., Inc. insiders filed 0 open-market purchases and 2 sales; 3,873 institutions reported holding it in 13F filings for Q2 2026, worth $254.3B in total; 4 superinvestors hold it, including Harris Associates (Oakmark) and Fairfax Financial.
Key figures
- Market capClose on Nov 9, 2026
- $366.7B
- Insider buysOpen market, last 90 days
- 0
- Insider sellsLast 90 days, $12.1M in total
- 2
- 13F holdersQ2 2026, +98 vs. previous quarter
- 3,873
- 13F valueReported value at the end of Q2 2026
- $254.3B
- Superinvestors holdingAt the end of Q2 2026
- 4
Price chart
Financials
See financial statementsFrom SEC filings, in USD.
- Revenue, FY2025
- $65.0B
- +1.3% year over year
- Net income, FY2025
- $18.3B
- +6.6% year over year
- Free cash flow, FY2025
- $12.4B
- −31.7% year over year
- Revenue, Q3 FY2026
- $18.1B
- +4.7% year over year
Revenue flow, FY2025
Green is profit; orange is costs, expenses and taxes. Percentages are shares of revenue.
Short interest
See short dataFrom FINRA, settlement date Oct 15, 2026.
- Short interest
- 26.8M
- Shares sold short
- Change
- −1.45M
- −5.1% vs. previous
- Days to cover
- 2.97
- At average daily volume
Superinvestors holding MRK, Q2 2026
Go to the superinvestors tab4 superinvestors report holding Merck & Co., Inc. on Form 13F. Percentages are the stock's share of each portfolio.
Harris Associates (Oakmark)
Bill Nygren
2.1%
Merck & Co., Inc.'s share of the portfolio
- Shares
- 12,073,109
- Value
- $1.55B
| Superinvestor | Weight | Value |
|---|---|---|
| Semper Augustus | 0.6% | $5.74M |
| Gardner Russo & Quinn | <0.1% | $211.0K |
Latest insider trades
See all insider tradesOpen-market purchases and sales by Merck & Co., Inc. insiders from Form 4, newest first.
| Filed (ET) | Trade date | Filing delay | Insider | Transaction | Shares | Avg price | Value | Holding change | Flags |
|---|---|---|---|---|---|---|---|---|---|
| Aug 13, 2026 (view filing)5:02 PM ET | Aug 13 | Same day | Guindo ChirfiEVP, Access, Policy & Comms | SSale | −10.0K | $135.00 | −$1.35M | −21.5%36.6K after | |
| Aug 13, 2026 (view filing)4:11 PM ET | Aug 12 | 1 day | Zachary JenniferEVP, General Counsel | SSale | −80.3K | $133.46 | −$10.7M | −63.8%45.5K after | |
| Aug 12, 2026 (view filing)4:10 PM ET | Aug 10-12 | 2 days | DeLuca Richard R.EVP&Pres, Merck Animal Heallth | SSale | −45.3K | $131.12 | −$5.94M | −29.1%110.2K after | 5 lots |
| Aug 10, 2026 (view filing)4:28 PM ET | Aug 6 | 4 days | DeLuca Richard R.EVP&Pres, Merck Animal Heallth | SSale | −6.05K | $130.38 | −$788.8K | −3.7%155.5K after | 3 lots |
| Aug 7, 2026 (view filing)4:21 PM ET | Aug 5 | 2 days | Maraldo David R.EVP & Pres. MMD | SSale | −18.7K | $128.72 | −$2.41M | −50.7%18.2K after | 3 lots |
| Aug 7, 2026 (view filing)4:19 PM ET | Aug 5 | 2 days | Williams David MichaelEVP,Chief Info&Digital Officer | SSale | −52.8K | $128.77 | −$6.81M | −62.5%31.7K after | 3 lots |
| Aug 7, 2026 (view filing)4:17 PM ET | Aug 6 | 1 day | Guindo ChirfiEVP, Access, Policy & Comms | SSale | −15.0K | $131.00 | −$1.97M | −24.3%46.6K after | |
| Feb 12, 2026 (view filing) | Feb 12 | Same day | Guindo ChirfiChief Marketing Officer | SSale | −10.0K | $121.46 | −$1.21M | −14.2%60.6K after | |
| Feb 10, 2026 (view filing) | Feb 10 | Same day | Li Dean YExecutive VP & President, MRL | SSale | −10.2K | $117.52 | −$1.20M | −10.0%92.0K after | |
| Feb 9, 2026 (view filing) | Feb 9 | Same day | Guindo ChirfiChief Marketing Officer | SSale | −10.0K | $118.41 | −$1.18M | −12.4%70.6K after |
Top 10 13F holders, Q2 2026
See all 3,873 holdersThe largest institutional positions in Merck & Co., Inc. at the end of Q2 2026; share changes are against Q1 2026.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| BlackRock, Inc. | 226,999,837 | $29.2B | 0.43% | +1,169,507+0.5% | Added |
| Vanguard Capital Management LLC | 161,323,174 | $20.7B | 0.44% | +335,550+0.2% | Added |
| State Street Corp | 120,413,256 | $15.6B | 0.46% | +1,087,583+0.9% | Added |
| Wellington Management Group LLP | 86,249,283 | $11.1B | 1.91% | +1,934,312+2.3% | Added |
| Vanguard Portfolio Management LLC | 67,738,969 | $8.70B | 0.39% | +434,664+0.6% | Added |
| Geode Capital Management, LLC | 60,744,214 | $7.79B | 0.42% | +1,186,060+2.0% | Added |
| Charles Schwab Investment Management Inc | 54,365,289 | $6.99B | 0.93% | +4,600,064+9.2% | Added |
| Morgan Stanley | 48,641,158 | $6.25B | 0.33% | +1,008,671+2.1% | Added |
| FMR LLC | 45,440,355 | $5.84B | 0.25% | +924,345+2.1% | Added |
| JPMorgan Chase & Co | 43,886,420 | $5.68B | 0.33% | −9,086,563−17.2% | Reduced |
Holders of 5% or more of MRK
See all 1 holders and filingsHolders whose latest Schedule 13D or 13G filing reports 5% or more of Merck & Co., Inc..
| Holder | Latest form | Stake | Change | First filed | Latest filing | Filing |
|---|---|---|---|---|---|---|
| Vanguard Capital Management LLC | 13G | 7.53%186.3M shares | New | Apr 30, 20261 filing | Apr 30, 2026 | SEC |
Politician trades
All politician trades in MRK45 members of Congress reported 127 trades in Merck & Co., Inc. since 2020. Newest filings:
| Filed | Politician | Type | Amount |
|---|---|---|---|
| Oct 7, 2026 |  Maria Elvira Salazar House · FL | Sell (partial) | $1K-$15K |
| Sep 9, 2026 | Maria Elvira Salazar House · FL | Buy | $15K-$50K |
| Sep 9, 2026 | Maria Elvira Salazar House · FL | Buy | $15K-$50K |
| Jul 21, 2026 |  Alan Armstrong Senate · OK | Sell (full) | $15K-$50K |
| Mar 16, 2026 |  Josh Gottheimer House · NJ | Buy | $1K-$15K |
House · FL · Oct 7, 2026
Sell (partial)$1K-$15K
House · FL · Sep 9, 2026
Buy$15K-$50K
House · FL · Sep 9, 2026
Buy$15K-$50K
Senate · OK · Jul 21, 2026
Sell (full)$15K-$50K
House · NJ · Mar 16, 2026
Buy$1K-$15K