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 7 sales; 3,854 institutions reported holding it in 13F filings for Q2 2026, worth $254.7B in total; 4 superinvestors hold it, including Harris Associates (Oakmark) and Fairfax Financial.
Open-market trades, last 90 days
Open-market purchases (P) and sales (S) by Merck & Co., Inc. insiders, counted by Form 4 filing. Trades with a flagged price and duplicate filings are left out.
- Open-market buys
- 0 filings
- Open-market sells
- 7 filings
- 5 insiders, $30.0M in total
- Insiders trading
- 5
- Net value
- −$30.0M
- Purchases minus sales
Insider roster
Directors, officers and 10% owners who have filed a Form 4 for Merck & Co., Inc., current and former, most recent filer first. Last reported holding is the position after the last non-derivative trade in their latest filing.
| Name | Title | Last reported holding | Last filing | Filings, past year |
|---|---|---|---|---|
| Guindo Chirfi | EVP, Access, Policy & Comms | 36,613 | Aug 13, 2026 | 8 |
| Zachary Jennifer | EVP, General Counsel | 45,509 | Aug 13, 2026 | 5 |
| DeLuca Richard R. | EVP&Pres, Merck Animal Heallth | 110,167 | Aug 12, 2026 | 6 |
| Maraldo David R. | EVP & Pres. MMD | 18,212 | Aug 7, 2026 | 3 |
| Williams David Michael | EVP,Chief Info&Digital Officer | 31,716 | Aug 7, 2026 | 6 |
| Seidman Christine E | Director | – | Jul 1, 2026 | 5 |
| Karsanbhai Surendralal Lanca | Director | – | Jul 1, 2026 | 2 |
| Coe Mary Ellen | Director | – | Jul 1, 2026 | 5 |
| Russo Patricia F | Director | – | Jun 2, 2026 | 1 |
| Lavizzo-Mourey Risa J | Director | – | Jun 2, 2026 | 1 |
| Glocer Thomas H | Director | – | Jun 2, 2026 | 4 |
| Baker Douglas M Jr | Director | 16,000 | Jun 2, 2026 | 1 |
| Craig Pamela J. | Director | – | Jun 2, 2026 | 1 |
| Thulin Inge G | Director | 2,933 | Jun 2, 2026 | 1 |
| Warden Kathy J | Director | – | Jun 2, 2026 | 1 |
| Rothman Paul | Director | – | Jun 2, 2026 | 1 |
| Mayo Stephen | Director | – | Jun 2, 2026 | 1 |
| Davis Robert M | Chairman, CEO & President | 450,351 | May 7, 2026 | 4 |
| Larson Betty D | EVP, Chief HR Officer | 13,774 | May 7, 2026 | 2 |
| Li Dean Y | Executive VP & President, MRL | 94,431 | May 7, 2026 | 5 |
| Litchfield Caroline | EVP & CFO | 92,301 | May 7, 2026 | 4 |
| Oosthuizen Johannes Jacobus | EVP, Oncology & Int?l | 21,895 | May 7, 2026 | 4 |
| Smart Dalton | SVP Fin. - Global Controller | 9,388 | May 7, 2026 | 5 |
| Foard Brian | EVP, Specialty, Pharma, & ID | – | May 7, 2026 | 1 |
| Chattopadhyay Sanat | Exe V-P & Pres. MMD | 15,347 | May 1, 2026 | 2 |
| Romanelli Joseph | President, Human Health Int?l | 28,739 | Jan 28, 2026 | 1 |
| Downing Cristal N | Chief Comm. & Public Afrs Ofcr | 0 | Nov 12, 2025 | 1 |
| Klobuchar Michael A | EVP - Chief Strategy Officer | 23,621 | May 6, 2024 | 0 |
| Wendell Peter C | Director | – | Mar 29, 2024 | 0 |
| Mizell Steven | EVP, Chief HR Officer | 23,619 | Feb 2, 2024 | 0 |
| Karachun Rita A | Sr. VP Fince-Global Controller | 45,710 | May 5, 2023 | 0 |
| LeCointe-Cephas Lisa | SVP Chief Ethics & Com Officer | 5,142 | May 5, 2023 | 0 |
| Frazier Kenneth C | Executive Chair | 700,653 | Nov 8, 2022 | 0 |
| Garay Arpa | SVP Human Health Global Mktg. | 2,109 | May 5, 2022 | 0 |
| Gerberding Julie L. | EVP, Chief Patient Officer | 48,712 | Feb 28, 2022 | 0 |
| Clyburn Frank | EVP & Pres ? Human Health | 97,095 | Nov 4, 2021 | 0 |
Insider trades
Each row adds up one type of transaction in one Form 4 filing. Only open-market purchases (P) and sales (S) are shown by default; use the filters to see grants, option exercises and other codes.
| 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 | |
| Feb 9, 2026 (view filing) | Feb 9 | Same day | Zachary JenniferEVP, General Counsel | SSale | −121.6K | $119.15 | −$14.5M | −63.8%68.9K after | 3 lots |
| Feb 6, 2026 (view filing) | Feb 6 | Same day | Williams David MichaelEVP,Chief Info&Digital Officer | SSale | −5.00K | $121.91 | −$609.5K | −14.0%30.8K after | |
| Feb 6, 2026 (view filing) | Feb 4 | 2 days | Smart DaltonSVP Fin. - Global Controller | SSale | −6.40K | $119.68 | −$766.0K | −43.8%8.20K after | 2 lots |
| Feb 6, 2026 (view filing) | Feb 6 | Same day | Oosthuizen Johannes JacobusPresident, U.S. Market | SSale | −15.0K | $121.87 | −$1.83M | −41.4%21.2K after | |
| Feb 6, 2026 (view filing) | Feb 4 | 2 days | Litchfield CarolineEVP & CFO | SSale | −42.0K | $119.61 | −$5.02M | −31.8%90.2K after | |
| Feb 6, 2026 (view filing) | Feb 4 | 2 days | Li Dean YExecutive VP & President, MRL | SSale | −15.1K | $118.77 | −$1.79M | −12.9%102.3K after | |
| Feb 6, 2026 (view filing) | Feb 5 | 1 day | Guindo ChirfiChief Marketing Officer | SSale | −20.0K | $121.88 | −$2.44M | −19.9%80.6K after | |
| Feb 6, 2026 (view filing) | Feb 6 | Same day | DeLuca Richard R.EVP&Pres, Merck Animal Heallth | SSale | −37.7K | $120.92 | −$4.56M | −19.0%160.2K after | |
| Feb 6, 2026 (view filing) | Feb 4 | 2 days | Davis Robert MChairman, CEO & President | SSale | −47.4K | $118.04 | −$5.60M | −9.7%443.6K after | 2 lots |
| Nov 12, 2025 (view filing) | Nov 10 | 2 days | Downing Cristal NChief Comm. & Public Afrs Ofcr | SSale | −7.08K | $87.00 | −$616.4K | −100.0%0 after | |
| Nov 4, 2025 (view filing) | Nov 3 | 1 day | Williams David MichaelEVP,Chief Info&Digital Officer | SSale | −8.61K | $83.59 | −$720.0K | −26.0%24.6K after | |
| Apr 29, 2025 (view filing) | Apr 25 | 4 days | Smart DaltonSVP Fin. - Global Controller | SSale | −4.26K | $82.76 | −$352.7K | −35.4%7.78K after | |
| Feb 20, 2025 (view filing) | Feb 19 | 1 day | Oosthuizen Johannes JacobusPresident, U.S. Market | SSale | −8.50K | $84.09 | −$714.8K | −21.7%30.7K after | |
| Feb 13, 2025 (view filing) | Feb 13 | Same day | Williams David MichaelEVP,Chief Info&Digital Officer | SSale | −6.00K | $85.34 | −$512.0K | −19.9%24.1K after | |
| Feb 7, 2025 (view filing) | Feb 6 | 1 day | Thulin Inge GDirector | PPurchase | +2.83K | $88.25 | +$250.0K | +2,832.9%2.93K after | |
| Feb 7, 2025 (view filing) | Feb 6 | 1 day | Downing Cristal NChief Comm. & Public Afrs Ofcr | SSale | −2.36K | $88.76 | −$209.6K | −25.0%7.08K after | |
| Feb 7, 2025 (view filing) | Feb 5 | 2 days | Baker Douglas M JrDirector | PPurchase | +15.0K | $88.50 | +$1.33M | +1,500.0%16.0K after | |
| Feb 15, 2024 (view filing) | Feb 14 | 1 day | Litchfield CarolineEVP & CFO | SSale | −38.3K | $125.50 | −$4.81M | −42.9%50.9K after | |
| Feb 15, 2024 (view filing) | Feb 13-14 | 2 days | Davis Robert MChairman, CEO & President | SSale | −235.0K | $125.68 | −$29.5M | −40.3%348.3K after | 3 lots |
| Feb 14, 2024 (view filing) | Feb 13 | 1 day | Romanelli JosephPresident, Human Health Int?l | SSale | −1.00K | $124.89 | −$124.9K | −4.9%19.6K after | |
| Feb 12, 2024 (view filing) | Feb 9 | 3 days | Li Dean YExecutive VP & President, MRL | SSale | −14.7K | $125.50 | −$1.85M | −24.1%46.2K after | |
| Feb 8, 2024 (view filing) | Feb 7 | 1 day | Williams David MichaelEVP,Chief Info&Digital Officer | SSale | −1.45K | $127.57 | −$185.1K | −6.8%19.8K after | |
| Feb 5, 2024 (view filing) | Feb 2 | 3 days | Oosthuizen Johannes JacobusPresident, U.S. Market | SSale | −19.0K | $127.18 | −$2.41M | −44.8%23.3K after | |
| Feb 2, 2024 (view filing) | Feb 2 | Same day | Mizell StevenEVP, Chief HR Officer | SSale | −50.7K | $126.65 | −$6.42M | −68.2%23.6K after | |
| Feb 2, 2024 (view filing) | Feb 2 | Same day | Zachary JenniferEVP, General Counsel | SSale | −49.5K | $126.97 | −$6.28M | −63.0%29.1K after | |
| Nov 13, 2023 (view filing) | Nov 9 | 4 days | Oosthuizen Johannes JacobusPresident, U.S. Market | SSale | −2.08K | $102.38 | −$213.1K | −10.3%18.2K after | |
| Nov 9, 2023 (view filing) | Nov 8 | 1 day | DeLuca Richard R.EVP&Pres, Merck Animal Heallth | SSale | −43.8K | $105.03 | −$4.60M | −28.2%111.8K after | |
| Aug 15, 2023 (view filing) | Aug 14 | 1 day | Mizell StevenEVP, Chief HR Officer | SSale | −4.25K | $109.01 | −$463.3K | −15.6%22.9K after | |
| Aug 4, 2023 (view filing) | Aug 3 | 1 day | Mizell StevenEVP, Chief HR Officer | SSale | −4.50K | $105.49 | −$474.7K | −14.2%27.2K after | |
| Aug 3, 2023 (view filing) | Aug 2 | 1 day | Romanelli JosephPresident, Human Health Int?l | SSale | −30 | $107.37 | −$3.22K | −0.1%20.6K after | |
| Aug 3, 2023 (view filing) | Aug 2 | 1 day | Romanelli JosephPresident, Human Health Int?l | SSale | −59 | $107.37 | −$6.33K | −100.0%0 after | |
| Jun 30, 2023 (view filing) | Dec 2, 2022 | 210 daysLate | Romanelli JosephPresident, Human Health Int?l | PPurchase | +59 | $109.67 | +$6.47K | New position59 after | |
| Jun 30, 2023 (view filing) | Dec 5, 2022-Apr 26, 2023 | 207 daysLate | Romanelli JosephPresident, Human Health Int?l | PPurchase | +350 | $108.19 | +$37.9K | +1.7%20.6K after | 7 lots |
| Jun 30, 2023 (view filing) | Mar 24 | 98 daysLate | Romanelli JosephPresident, Human Health Int?l | SSale | −35 | $104.65 | −$3.66K | −0.2%20.6K after | |
| May 5, 2023 (view filing) | May 3 | 2 days | Mizell StevenEVP, Chief HR Officer | SSale | −53.4K | $119.01 | −$6.36M | −62.8%31.7K after | 4 lots10b5-1 |
| May 5, 2023 (view filing) | May 4 | 1 day | Zachary JenniferEVP, General Counsel | SSale | −19.1K | $117.59 | −$2.25M | −35.3%35.1K after | |
| May 5, 2023 (view filing) | May 4 | 1 day | Karachun Rita ASr. VP Fince-Global Controller | SSale | −15.9K | $117.53 | −$1.87M | −25.8%45.7K after | |
| May 3, 2023 (view filing) | May 2 | 1 day | Williams David MichaelEVP,Chief Info&Digital Officer | SSale | −7.51K | $116.82 | −$877.2K | −40.4%11.1K after | |
| May 2, 2023 (view filing) | Apr 28-May 1 | 4 days | DeLuca Richard R.EVP&Pres, Merck Animal Heallth | SSale | −141.6K | $115.55 | −$16.4M | −47.8%154.5K after | 2 lots |
| Apr 28, 2023 (view filing) | Apr 28 | Same day | Davis Robert MChairman, CEO & President | SSale | −143.3K | $114.93 | −$16.5M | −34.5%271.8K after |