MRKMerck & Co., Inc.
Healthcare · Drug Manufacturers - GeneralNYSEStockMkt cap $367.5B
Disclosed trades
112
0 in 30d · 2 in 90d
Politicians
40
Last trade Aug 19, 2026
Buys
48
$629K at range midpoints
Sells
60
$1M at range midpoints
Closing price · 365 days
Sep 24, 2025 – Sep 23, 2026
Monthly buys vs sells · 24 months
Counts of disclosed transactions
- Buys
- Sells (incl. partial)
Politicians who traded it
| Politician | Seat | Trades | Buys | Sells | Bought (mid) | Sold (mid) | Last trade |
|---|---|---|---|---|---|---|---|
| DJared Moskowitz | House · FL-23 | 9 | 6 | 3 | $48K | $24K | Jan 15, 2025 |
| DGilbert Ray Cisneros, Jr. | House · CA-31 | 8 | 5 | 3 | $64.5K | $48.5K | Dec 19, 2025 |
| DKathy E. Manning | House · NC-06 | 7 | 6 | 1 | $72.5K | $8K | Jul 2, 2024 |
| DLois Frankel | House · FL-22 | 7 | 2 | 5 | $16K | $40K | Sep 8, 2023 |
| DDaniel S. Goldman | House · NY-10 | 5 | 2 | 3 | $16K | $48.5K | Jul 14, 2023 |
| DJulie Johnson | House · TX-32 | 5 | 2 | 3 | $16K | $24K | Dec 18, 2025 |
| DTom Malinowski | House · NJ-07 | 5 | 2 | 2 | $65K | $65K | Nov 6, 2020 |
| RByron Donalds | House · FL-19 | 4 | 0 | 3 | $0 | $24K | Jan 16, 2025 |
| DJosh Gottheimer | House · NJ-05 | 4 | 1 | 3 | $8K | $48.5K | Feb 4, 2026 |
| RMichael T. McCaul | House · TX-10 | 4 | 0 | 2 | $0 | $32.5K | Jan 13, 2026 |
| RScott Franklin | House · FL-18 | 4 | 2 | 2 | $16K | $40.5K | Jun 16, 2025 |
| RMarjorie Taylor Greene | House · GA-14 | 3 | 3 | 0 | $24K | $0 | Aug 28, 2025 |
| RRick W. Allen | House · GA-12 | 3 | 1 | 2 | $32.5K | $40.5K | Mar 10, 2021 |
| RRobert P. Bresnahan, Jr. | House · PA-08 | 3 | 1 | 2 | $32.5K | $65K | May 15, 2025 |
| DThomas R. Suozzi | House · NY-03 | 3 | 1 | 2 | $32.5K | $65K | Nov 18, 2019 |
| RTommy Tuberville | Senate · AL | 3 | 1 | 2 | $8K | $16K | Oct 16, 2023 |
| RBruce Westerman | House · AR-04 | 2 | 1 | 1 | $8K | $8K | Apr 21, 2025 |
| DGreg Stanton | House · AZ-04 | 2 | 1 | 1 | $8K | $8K | Oct 24, 2023 |
| RJefferson Shreve | House · IN-06 | 2 | 1 | 1 | $32.5K | $32.5K | Apr 17, 2025 |
| RJohn James | House · MI-10 | 2 | 1 | 1 | $8K | $8K | Sep 4, 2024 |
| RJohn R. Curtis | Senate · UT | 2 | 1 | 1 | $8K | $8K | Jul 19, 2021 |
| RLisa C. McClain | House · MI-09 | 2 | 1 | 1 | $8K | $8K | Aug 4, 2025 |
| RMaria Elvira Salazar | House · FL-27 | 2 | 2 | 0 | $65K | $0 | Aug 19, 2026 |
| RMichael C. Burgess | House · TX-26 | 2 | 0 | 2 | $0 | $16K | Apr 10, 2024 |
| DRitchie Torres | House · NY-15 | 2 | 1 | 1 | $8K | $8K | Jul 11, 2025 |
| DVal T. Hoyle | House · OR-04 | 2 | 1 | 1 | $8K | $8K | Sep 23, 2025 |
| DZoe Lofgren | House · CA-18 | 2 | 1 | 1 | $8K | $8K | May 25, 2023 |
| RAlan Armstrong | Senate · OK | 1 | 0 | 1 | $0 | $32.5K | Mar 27, 2026 |
| RCarol D. Miller | House · WV-01 | 1 | 0 | 1 | $0 | $32.5K | Jul 28, 2021 |
| RGus M. Bilirakis | House · FL-12 | 1 | 0 | 1 | $0 | $0 | Oct 5, 2021 |
| RJohn H. Rutherford | House · FL-05 | 1 | 0 | 1 | $0 | $8K | Mar 16, 2022 |
| DJonathan L. Jackson | House · IL-01 | 1 | 0 | 1 | $0 | $32.5K | Sep 24, 2024 |
| DKelly Morrison | House · MN-03 | 1 | 0 | 1 | $0 | $8K | Mar 20, 2025 |
| RMike Gallagher | House · WI-08 | 1 | 0 | 1 | $0 | $8K | Jan 13, 2020 |
| DMikie Sherrill | House · NJ-11 | 1 | 0 | 1 | $0 | $8K | Feb 20, 2020 |
| RPete Ricketts | Senate · NE | 1 | 0 | 1 | $0 | $75K | Sep 21, 2023 |
| DRick Larsen | House · WA-02 | 1 | 1 | 0 | $8K | $0 | Jul 7, 2022 |
| DSara Jacobs | House · CA-51 | 1 | 0 | 1 | $0 | $75K | Apr 9, 2021 |
| RSheri Biggs | House · SC-03 | 1 | 0 | 1 | $0 | $32.5K | Mar 19, 2025 |
| DWilliam R. Keating | House · MA-09 | 1 | 1 | 0 | $8K | $0 | Mar 17, 2021 |
Recent trades
| Politician | Ticker | Asset | Type | Owner | Amount | Traded | Filed | Source |
|---|---|---|---|---|---|---|---|---|
| RMaria Elvira Salazar | MRK | Merck & Company, Inc. Common Stock (MRK) | Buy | Self | $15,001 - $50,000 | Aug 19, 2026 | Sep 9, 202621d | Filing |
| RMaria Elvira Salazar | MRK | Merck & Company, Inc. Common Stock (MRK) | Buy | Self | $15,001 - $50,000 | Aug 19, 2026 | Sep 9, 202621d | Filing |
| RAlan Armstrong | MRK | Merck & Company, Inc. Common Stock (new) | Sell | Self | $15,001 - $50,000 | Mar 27, 2026 | Jul 21, 2026116d | Filing |
| DJosh Gottheimer | MRK | Merck & Company, Inc. Common Stock (MRK) | Buy | Joint | $1,001 - $15,000 | Feb 4, 2026 | Mar 16, 202640d | Filing |
| RMichael T. McCaul | MRK | MERCK &CO. INC | Sell | Spouse | $15,001 - $50,000 | Jan 13, 2026 | Feb 11, 202629d | FilingOCR |
| DJulie Johnson | MRK | Merck & Company, Inc. Common Stock (MRK) | Sell | Joint | $1,001 - $15,000 | Dec 18, 2025 | Jan 15, 202628d | Filing |
| DGilbert Ray Cisneros, Jr. | MRK | Merck & Company, Inc. Common Stock (MRK) | Buy | Self | $1,001 - $15,000 | Dec 19, 2025 | Jan 12, 202624d | Filing |
| DGilbert Ray Cisneros, Jr. | MRK | Merck & Company, Inc. Common Stock (MRK) | Buy | Self | $1,001 - $15,000 | Nov 18, 2025 | Dec 15, 202527d | Filing |
| DJulie Johnson | MRK | Merck & Company, Inc. Common Stock (MRK) | Partial | Joint | $1,001 - $15,000 | Nov 13, 2025 | Dec 11, 202528d | Filing |
| DVal T. Hoyle | MRK | Merck & Company, Inc. Common Stock (MRK) | Sell | Spouse | $1,001 - $15,000 | Sep 23, 2025 | Oct 10, 202517d | Filing |
| RSheri Biggs | MRK | Merck & Company, Inc. Common Stock (MRK) | Sell | Spouse | $15,001 - $50,000 | Mar 19, 2025 | Oct 5, 2025200d | Filing |
| DGilbert Ray Cisneros, Jr. | MRK | Merck & Company, Inc. Common Stock (MRK) | Buy | Self | $1,001 - $15,000 | Aug 5, 2025 | Sep 12, 202538d | Filing |
| RLisa C. McClain | MRK | Merck & Company, Inc. Common Stock (MRK) | Sell | Spouse | $1,001 - $15,000 | Aug 4, 2025 | Sep 12, 202539d | Filing |
| DVal T. Hoyle | MRK | Merck & Company, Inc. Common Stock (MRK) | Buy | Spouse | $1,001 - $15,000 | Oct 29, 2024 | Sep 12, 2025318d | Filing |
| DJulie Johnson | MRK | Merck & Company, Inc. Common Stock (MRK) | Partial | Joint | $1,001 - $15,000 | Aug 14, 2025 | Sep 11, 202528d | Filing |
| RMarjorie Taylor Greene | MRK | Merck & Company, Inc. Common Stock (MRK) | Buy | Self | $1,001 - $15,000 | Aug 28, 2025 | Aug 29, 20251d | Filing |
| DRitchie Torres | MRK | Merck & Company, Inc. Common Stock (MRK) | Sell | Self | $1,001 - $15,000 | Jul 11, 2025 | Aug 20, 202540d | Filing |
| DRitchie Torres | MRK | Merck & Company, Inc. Common Stock (MRK) | Buy | Self | $1,001 - $15,000 | Sep 26, 2024 | Aug 20, 2025328d | Filing |
| RLisa C. McClain | MRK | Merck & Company, Inc. Common Stock (MRK) | Buy | Spouse | $1,001 - $15,000 | Jun 24, 2025 | Aug 13, 202550d | Filing |
| RScott Franklin | MRK | Merck & Company, Inc. Common Stock (MRK) | Sell | Joint | $1,001 - $15,000 | Jun 16, 2025 | Jul 14, 202528d | Filing |
| DJulie Johnson | MRK | Merck & Company, Inc. Common Stock (MRK) | Buy | Joint | $1,001 - $15,000 | Jun 13, 2025 | Jul 14, 202531d | Filing |
| RScott Franklin | MRK | Merck & Company, Inc. Common Stock (MRK) | Buy | Spouse | $1,001 - $15,000 | Aug 7, 2024 | Jul 3, 2025330d | Filing |
| DGilbert Ray Cisneros, Jr. | MRK | Merck & Company, Inc. Common Stock (MRK) | Sell | Self | $1,001 - $15,000 | May 30, 2025 | Jun 6, 20257d | Filing |
| RRobert P. Bresnahan, Jr. | MRK | Merck & Company, Inc. Common Stock (MRK) | Sell | Self | $15,001 - $50,000 | May 15, 2025 | May 31, 202516d | Filing |
| RBruce Westerman | MRK | Merck & Company, Inc. Common Stock (MRK) | Sell | Self | $1,001 - $15,000 | Apr 21, 2025 | May 12, 202521d | Filing |
| RJefferson Shreve | MRK | Merck & Company, Inc. Common Stock (MRK) | Sell | Self | $15,001 - $50,000 | Apr 17, 2025 | May 8, 202521d | Filing |
| RRobert P. Bresnahan, Jr. | MRK | Merck & Company, Inc. Common Stock (MRK) | Buy | Self | $15,001 - $50,000 | Apr 8, 2025 | May 8, 202530d | Filing |
| RMarjorie Taylor Greene | MRK | Merck & Company, Inc. Common Stock (MRK) | Buy | Self | $1,001 - $15,000 | May 5, 2025 | May 6, 20251d | Filing |
| DGilbert Ray Cisneros, Jr. | MRK | Merck & Company, Inc. Common Stock (MRK) | Buy | Self | $1,001 - $15,000 | Apr 29, 2025 | May 6, 20257d | Filing |
| RBruce Westerman | MRK | Merck & Company, Inc. Common Stock (MRK) | Buy | Self | $1,001 - $15,000 | Mar 3, 2025 | Apr 16, 202544d | Filing |
| RMarjorie Taylor Greene | MRK | Merck & Company, Inc. Common Stock (MRK) | Buy | Self | $1,001 - $15,000 | Apr 9, 2025 | Apr 11, 20252d | Filing |
| DKelly Morrison | MRK | Merck & Company, Inc. Common Stock (MRK) | Partial | Self | $1,001 - $15,000 | Mar 20, 2025 | Apr 11, 202522d | Filing |
| DGilbert Ray Cisneros, Jr. | MRK | Merck & Company, Inc. Common Stock (MRK) | Partial | Self | $15,001 - $50,000 | Mar 31, 2025 | Apr 7, 20257d | Filing |
| RRobert P. Bresnahan, Jr. | MRK | Merck & Company, Inc. Common Stock (MRK) | Sell | Self | $15,001 - $50,000 | Feb 25, 2025 | Mar 27, 202530d | Filing |
| RJefferson Shreve | MRK | Merck & Company, Inc. Common Stock (MRK) | Buy | Self | $15,001 - $50,000 | Feb 24, 2025 | Mar 9, 202513d | Filing |
| DGilbert Ray Cisneros, Jr. | MRK | Merck & Company, Inc. Common Stock (MRK) | Buy | Self | $15,001 - $50,000 | Feb 26, 2025 | Mar 6, 20258d | Filing |
| DJulie Johnson | MRK | Merck & Company, Inc. Common Stock (MRK) | Buy | Joint | $1,001 - $15,000 | Jan 17, 2025 | Feb 12, 202526d | Filing |
| DGilbert Ray Cisneros, Jr. | MRK | Merck & Company, Inc. Common Stock (MRK) | Sell | Self | $1,001 - $15,000 | Jan 24, 2025 | Feb 11, 202518d | Filing |
| DJosh Gottheimer | MRK | Merck & Company, Inc. Common Stock (MRK) | Sell | Joint | $15,001 - $50,000 | Jan 27, 2025 | Feb 10, 202514d | Filing |
| RByron Donalds | MRK | Merck & Company, Inc. Common Stock (MRK) | Sell | Spouse | $1,001 - $15,000 | Jan 16, 2025 | Feb 10, 202525d | Filing |
| RByron Donalds | MRK | Merck & Company, Inc. Common Stock (MRK) | Sell | Self | $1,001 - $15,000 | Jan 16, 2025 | Feb 10, 202525d | Filing |
| DJared Moskowitz | MRK | Merck & Company, Inc. Common Stock (MRK) | Sell | Self | $1,001 - $15,000 | Jan 15, 2025 | Feb 10, 202526d | Filing |
| DJared Moskowitz | MRK | Merck & Company, Inc. Common Stock (MRK) | Sell | Dependent | $1,001 - $15,000 | Jan 15, 2025 | Feb 10, 202526d | Filing |
| DJared Moskowitz | MRK | Merck & Company, Inc. Common Stock (MRK) | Sell | Dependent | $1,001 - $15,000 | Jan 15, 2025 | Feb 10, 202526d | Filing |
| DJared Moskowitz | MRK | Merck & Company, Inc. Common Stock (MRK) | Buy | Dependent | $1,001 - $15,000 | Nov 8, 2024 | Dec 9, 202431d | Filing |
| RByron Donalds | MRK | Merck & Co Inc (MRK) | SellReview | Spouse | $1,001 - $15,000 | Aug 12, 2022 | Nov 8, 2024819d | FilingOCR |
| RByron Donalds | MRK | Merck & Co Inc (MRK) | ExchangeReview | Self | $1,001 - $15,000 | Aug 12, 2022 | Nov 8, 2024819d | FilingOCR |
| DJonathan L. Jackson | MRK | Merck & Company, Inc. Common Stock (MRK) | Sell | Joint | $15,001 - $50,000 | Sep 24, 2024 | Oct 11, 202417d | Filing |
| RJohn James | MRK | Merck & Company, Inc. Common Stock (MRK) | Sell | Self | $1,001 - $15,000 | Sep 4, 2024 | Sep 6, 20242d | Filing |
| RJohn James | MRK | Merck & Company, Inc. Common Stock (MRK) | Buy | Self | $1,001 - $15,000 | Nov 10, 2023 | Sep 2, 2024297d | Filing |
Insider activity Filed
Insiders
31
Pharmaceutical Preparations
Open-market buys · 90d
0
$0 bought
Open-market sells · 90d
17
$30M sold
Net · 90d
-$30M
-$72M net over 12 months · last Aug 13, 2026
| Date | Insider | Kind | Security | Shares | Price | Value | Post-holdings | D/I | 10b5-1 | Source |
|---|---|---|---|---|---|---|---|---|---|---|
| Aug 13, 2026filed Aug 13, 2026 | Chirfi GuindoEVP, Access, Policy & Comms | Sale | Common Stock | −10,000 | $135.00 | $1,350,000 | 36,613.13 | D | — | 4 |
| Aug 12, 2026filed Aug 12, 2026 | Richard R. DeLucaEVP&Pres, Merck Animal Heallth | Sale | Common Stock | −600 | $132.04 | $79,222 | 110,167.07 | D | — | 4 |
| Aug 12, 2026filed Aug 12, 2026 | Richard R. DeLucaEVP&Pres, Merck Animal Heallth | Sale | Common Stock | −11,099 | $131.61 | $1,460,770 | 110,767.07 | D | — | 4 |
| Aug 12, 2026filed Aug 13, 2026 | Jennifer ZacharyEVP, General Counsel | Exercise | Stock Option (Right to Buy)deriv. | −13,433 | $0.00 | — | 0 | D | — | 4 |
| Aug 12, 2026filed Aug 13, 2026 | Jennifer ZacharyEVP, General Counsel | Exercise | Stock Option (Right to Buy)deriv. | −41,494 | $0.00 | — | 0 | D | — | 4 |
| Aug 12, 2026filed Aug 13, 2026 | Jennifer ZacharyEVP, General Counsel | Sale | Common Stock | −80,315 | $133.46 | $10,718,495 | 45,509.25 | D | — | 4 |
| Aug 12, 2026filed Aug 13, 2026 | Jennifer ZacharyEVP, General Counsel | Exercise | Common Stock | 13,433 | $84.71 | $1,137,909 | 125,824.25 | D | — | 4 |
| Aug 12, 2026filed Aug 13, 2026 | Jennifer ZacharyEVP, General Counsel | Exercise | Common Stock | 41,494 | $117.89 | $4,891,728 | 112,391.25 | D | — | 4 |
| Aug 11, 2026filed Aug 12, 2026 | Richard R. DeLucaEVP&Pres, Merck Animal Heallth | Sale | Common Stock | −5,427 | $132.35 | $718,261 | 121,866.07 | D | — | 4 |
| Aug 11, 2026filed Aug 12, 2026 | Richard R. DeLucaEVP&Pres, Merck Animal Heallth | Sale | Common Stock | −7,410 | $131.33 | $973,165 | 127,293.07 | D | — | 4 |
Shares, prices and post-transaction holdings are exactly as reported on SEC Form 4. Net figures count open-market buys minus open-market sales only (awards, exercises, withholding and gifts are excluded).
Unusual activity Estimated
- 43Committee overlapMar 27, 2026
Sen. Alan Armstrong sold $15,001–$50,000 of MRK while sitting on Senate Health
Details
- Committee
- Senate Committee on Health, Education, Labor, and Pensions
- Leadership seat
- No
- Sector
- Healthcare
- Disclosed range
- $15,001 - $50,000
- 65Insider overlapFeb 4, 2026
Rep. Josh Gottheimer bought MRK the same day its President sold $1.8M
Details
- Politician
- Josh Gottheimer
- Ticker
- MRK
- Asset
- Merck & Company, Inc. Common Stock (MRK)
- Tx type
- buy
- Tx date
- Feb 4, 2026
- Filing date
- Mar 16, 2026
- Amount low
- $1,001
- Amount high
- $15,000
- Amount mid
- $8,001
- Disclosed range
- $1,001 - $15,000
- Reporting lag days
- 40
- Is whale
- No
- Insider trade
- {"insider":{"slug":"dean-y-li","name":"Dean Y Li","title":"Executive VP & President, MRL","short_title":"President"},"company":"Merck & Co., Inc.","ticker":"MRK","tx_kind":"open_market_sale","tx_date":"2026-02-04","shares":15087,"price":118.7661,"value":1791824.15,"is_10b5_1":false}
- Days between
- 0
- Opposite side
- Yes
- 50Insider overlapJan 13, 2026
Rep. Michael T. McCaul sold MRK 22 days before its President sold $1.8M
Details
- Politician
- Michael T. McCaul
- Ticker
- MRK
- Asset
- MERCK &CO. INC
- Tx type
- sell
- Tx date
- Jan 13, 2026
- Filing date
- Feb 11, 2026
- Amount low
- $15,001
- Amount high
- $50,000
- Amount mid
- $32,501
- Disclosed range
- $15,001 - $50,000
- Reporting lag days
- 29
- Is whale
- No
- Insider trade
- {"insider":{"slug":"dean-y-li","name":"Dean Y Li","title":"Executive VP & President, MRL","short_title":"President"},"company":"Merck & Co., Inc.","ticker":"MRK","tx_kind":"open_market_sale","tx_date":"2026-02-04","shares":15087,"price":118.7661,"value":1791824.15,"is_10b5_1":false}
- Days between
- -22
- Opposite side
- No
- 42Well timedDec 19, 2025
Rep. Gilbert Ray Cisneros, Jr.'s MRK buy is up 17% after 30 days
Details
- Politician
- Gilbert Ray Cisneros, Jr.
- Ticker
- MRK
- Asset
- Merck & Company, Inc. Common Stock (MRK)
- Tx type
- buy
- Tx date
- Dec 19, 2025
- Filing date
- Jan 12, 2026
- Amount low
- $1,001
- Amount high
- $15,000
- Amount mid
- $8,001
- Disclosed range
- $1,001 - $15,000
- Reporting lag days
- 24
- Is whale
- No
- Entry date
- Dec 19, 2025
- Entry close
- 101.09
- Exit date
- Feb 4, 2026
- Exit close
- 118.33
- Forward return
- +17.1%
- Sign adjusted return
- +17.1%
- N trading days
- 30
- 30Cluster sellMar 19, 2025
3 members sold MRK within 14 days
Details
- Ticker
- MRK
- Side
- sell
- Window days
- 14
- Window start
- Mar 19, 2025
- Window end
- Mar 31, 2025
- N politicians
- 3
- N trades
- 3
- Total mid
- $73,002
- Has whale
- No
- Members
- Sheri Biggs, Kelly Morrison, Gilbert Ray Cisneros, Jr.
- Tx ids
- 20,096, 24,507, 24,759
- 30Cluster buyFeb 24, 2025
3 members bought MRK within 14 days
Details
- Ticker
- MRK
- Side
- buy
- Window days
- 14
- Window start
- Feb 24, 2025
- Window end
- Mar 3, 2025
- N politicians
- 3
- N trades
- 3
- Total mid
- $73,002
- Has whale
- No
- Members
- Jefferson Shreve, Gilbert Ray Cisneros, Jr., Bruce Westerman
- Tx ids
- 25,158, 25,285, 24,228
- 45Cluster sellJan 15, 2025
4 members sold MRK within 14 days
Details
- Ticker
- MRK
- Side
- sell
- Window days
- 14
- Window start
- Jan 15, 2025
- Window end
- Jan 27, 2025
- N politicians
- 4
- N trades
- 7
- Total mid
- $80,504
- Has whale
- No
- Members
- Jared Moskowitz, Byron Donalds, Gilbert Ray Cisneros, Jr., Josh Gottheimer
- Tx ids
- 25,654, 25,655, 25,656, 25,747, 25,748, 25,618, 25,699