Merck & Company (MRK): Congress and insider trades
Who in Congress and inside the company traded MRK, when each filing appeared, and what buying after each one would have earned against the S&P 500.
Key Facts
- Merck & Company (MRK) is a listed stock on NYSE.
- 39 members of Congress filed 87 buys and 94 sells of MRK, the latest published 2026-09-10 (10 September 2026).
- Insiders filed 0 open market buys worth $0 and 9 sells worth $30M, the latest filed 2026-08-13 (13 August 2026).
- Across 48 scored buys, Congress averaged +2.2% against the S&P 500 (SPY) over the 90 days after disclosure, with 56% of them ahead of the index. That result is not distinguishable from luck.
- Data as of 2026-09-29 (29 September 2026).
Congress buys 87 39 members
Congress sells 94
Insider buys 0 $0
Insider sells 9 $30M
Congress buys vs S&P, 90d +2.2% 48 scored buys
Insider buys vs S&P, 90d n/a 0 scored buys
Congress trades in MRK
as of 2026-09-10 Showing the latest 100 of 183.
| Filed | Member | Type | Size | Days to file | 90 day vs S&P |
|---|---|---|---|---|---|
| 10 Sep 2026 | Maria Elvira Salazar (R-FL) | buy | 15K–50K | 21 | n/a |
| 7 Sep 2026 | Ro Khanna (D-CA) | buy | 15K–50K | 28 | n/a |
| 7 Sep 2026 | Ro Khanna (D-CA) | sell | 1K–15K | 32 | n/a |
| 7 Sep 2026 | Ro Khanna (D-CA) | buy | 1K–15K | 11 | n/a |
| 12 Aug 2026 | Ro Khanna (D-CA) | buy | 1K–15K | 30 | n/a |
| 21 Jul 2026 | Alan Armstrong (R-OK) | sell | 15K–50K | 116 | n/a |
| 8 Jul 2026 | Ro Khanna (D-CA) | buy | 1K–15K | 34 | n/a |
| 8 Jul 2026 | Ro Khanna (D-CA) | buy | 1K–15K | 20 | n/a |
| 1 Jul 2026 | Keith Self (R-TX) | sell | 1K–15K | 536 | n/a |
| 11 Jun 2026 | Ro Khanna (D-CA) | sell | 15K–50K | 25 | n/a |
| 9 Apr 2026 | Ro Khanna (D-CA) | buy | 15K–50K | 28 | -7.2% |
| 17 Mar 2026 | Josh Gottheimer (D-NJ) | buy | 1K–15K | 40 | -12.4% |
| 12 Feb 2026 | Michael McCaul (R-TX) | sell | 15K–50K | 29 | n/a |
| 16 Jan 2026 | Julie Johnson (D-TX) | sell | 1K–15K | 28 | n/a |
| 13 Jan 2026 | Gil Cisneros (D-CA) | buy | 1K–15K | 24 | +8.0% |
| 16 Dec 2025 | Gil Cisneros (D-CA) | buy | 1K–15K | 27 | +17.5% |
| 12 Dec 2025 | Julie Johnson (D-TX) | sell | 1K–15K | 28 | n/a |
| 2 Jun 2025 | Rob Bresnahan (R-PA) | sell | 15K–50K | 16 | n/a |
| 15 May 2025 | Ro Khanna (D-CA) | buy | 1K–15K | 38 | +1.0% |
| 15 May 2025 | Ro Khanna (D-CA) | buy | 1K–15K | 38 | +1.0% |
| 15 May 2025 | Michael McCaul (R-TX) | buy | 100K–250K | 40 | +1.0% |
| 15 May 2025 | Ro Khanna (D-CA) | buy | 15K–50K | 27 | +1.0% |
| 15 May 2025 | Ro Khanna (D-CA) | sell | 15K–50K | 19 | n/a |
| 13 May 2025 | Bruce Westerman (R-AR) | sell | 1K–15K | 21 | n/a |
| 9 May 2025 | Jefferson Shreve (R-IN) | sell | 15K–50K | 21 | n/a |
| 9 May 2025 | Rob Bresnahan (R-PA) | buy | 15K–50K | 30 | -8.3% |
| 16 Nov 2023 | Tommy Tuberville (R-AL) | sell | 1K–15K | 31 | n/a |
| 10 Nov 2023 | Ro Khanna (D-CA) | buy | 1K–15K | 8 | +9.0% |
| 10 Nov 2023 | Ro Khanna (D-CA) | buy | 1K–15K | 37 | +9.0% |
| 10 Nov 2023 | Ro Khanna (D-CA) | buy | 1K–15K | 29 | +9.0% |
| 9 Nov 2023 | Greg Stanton (D-AZ) | buy | 1K–15K | 44 | +12.2% |
| 9 Nov 2023 | Greg Stanton (D-AZ) | sell | 1K–15K | 16 | n/a |
| 20 Oct 2023 | Pete Ricketts (R-NE) | sell | 50K–100K | 29 | n/a |
| 13 Oct 2023 | Scott Franklin (R-FL) | sell | 15K–50K | 31 | n/a |
| 11 Oct 2023 | Lois Frankel (D-FL) | sell | 1K–15K | 32 | n/a |
| 11 Oct 2023 | Lois Frankel (D-FL) | sell | 1K–15K | 34 | n/a |
| 9 Oct 2023 | Ro Khanna (D-CA) | buy | 1K–15K | 30 | +4.4% |
| 4 Oct 2023 | Michael Burgess (R-TX) | sell | 1K–15K | 20 | n/a |
| 7 Sep 2023 | Ro Khanna (D-CA) | buy | 1K–15K | 34 | -7.3% |
| 7 Sep 2023 | Ro Khanna (D-CA) | sell | 1K–15K | 8 | n/a |
| 28 Aug 2023 | Lois Frankel (D-FL) | sell | 1K–15K | 24 | n/a |
| 14 Aug 2023 | Daniel S. Goldman (D-NY) | sell | 1K–15K | 30 | n/a |
| 14 Aug 2023 | Daniel S. Goldman (D-NY) | sell | 1K–15K | 32 | n/a |
| 11 Aug 2023 | Rick Allen (R-GA) | sell | 15K–50K | 883 | n/a |
| 31 Jul 2023 | Lois Frankel (D-FL) | sell | 1K–15K | 30 | n/a |
| 12 Jul 2023 | Ro Khanna (D-CA) | buy | 1K–15K | 15 | +0.6% |
| 12 Jul 2023 | Ro Khanna (D-CA) | sell | 50K–100K | 12 | n/a |
| 23 Jun 2023 | Michael McCaul (R-TX) | sell | 100K–250K | 41 | n/a |
| 23 Jun 2023 | Michael McCaul (R-TX) | sell | 15K–50K | 41 | n/a |
| 14 Jun 2023 | Ro Khanna (D-CA) | sell | 1K–15K | 20 | n/a |
| 14 Jun 2023 | Ro Khanna (D-CA) | buy | 1K–15K | 20 | -2.7% |
| 7 Jun 2023 | Zoe Lofgren (D-CA) | sell | 1K–15K | 12 | n/a |
| 29 May 2023 | Rick Larsen (D-WA) | buy | 1K–15K | 323 | -5.3% |
| 22 May 2023 | Daniel S. Goldman (D-NY) | buy | 1K–15K | 39 | -9.0% |
| 24 Apr 2023 | Michael McCaul (R-TX) | sell | 15K–50K | 19 | n/a |
| 24 Apr 2023 | Michael McCaul (R-TX) | sell | 50K–100K | 19 | n/a |
| 17 Apr 2023 | Daniel S. Goldman (D-NY) | sell | 15K–50K | 42 | n/a |
| 12 Apr 2023 | Ro Khanna (D-CA) | sell | 1K–15K | 24 | n/a |
| 12 Apr 2023 | Ro Khanna (D-CA) | buy | 15K–50K | 14 | -14.7% |
| 13 Mar 2023 | Jared Moskowitz (D-FL) | buy | 1K–15K | 14 | -8.5% |
| 10 Mar 2023 | Ro Khanna (D-CA) | buy | 1K–15K | 26 | -6.5% |
| 10 Mar 2023 | Ro Khanna (D-CA) | sell | 1K–15K | 22 | n/a |
| 3 Mar 2023 | Diana Harshbarger (R-TN) | sell | 1K–15K | 16 | n/a |
| 27 Feb 2023 | Daniel S. Goldman (D-NY) | buy | 1K–15K | 24 | -1.1% |
| 20 Feb 2023 | Josh Gottheimer (D-NJ) | sell | 1K–15K | 37 | n/a |
| 9 Feb 2023 | Ro Khanna (D-CA) | sell | 15K–50K | 32 | n/a |
| 9 Feb 2023 | Ro Khanna (D-CA) | buy | 1K–15K | 27 | +7.6% |
| 9 Feb 2023 | Ro Khanna (D-CA) | sell | 1K–15K | 35 | n/a |
| 9 Feb 2023 | Ro Khanna (D-CA) | sell | 15K–50K | 35 | n/a |
| 9 Feb 2023 | Ro Khanna (D-CA) | sell | 1K–15K | 33 | n/a |
| 4 Jan 2023 | Ro Khanna (D-CA) | buy | 1K–15K | 28 | -8.7% |
| 26 Dec 2022 | Michael McCaul (R-TX) | sell | 100K–250K | 43 | n/a |
| 26 Dec 2022 | Michael McCaul (R-TX) | sell | 15K–50K | 43 | n/a |
| 7 Dec 2022 | Ro Khanna (D-CA) | sell | 15K–50K | 19 | n/a |
| 7 Dec 2022 | Ro Khanna (D-CA) | sell | 1K–15K | 34 | n/a |
| 7 Dec 2022 | Ro Khanna (D-CA) | sell | 1K–15K | 35 | n/a |
| 17 Nov 2022 | Ro Khanna (D-CA) | sell | 15K–50K | 15 | n/a |
| 14 Oct 2022 | Michael McCaul (R-TX) | buy | 50K–100K | 34 | +10.9% |
| 14 Oct 2022 | Michael McCaul (R-TX) | buy | 15K–50K | 34 | +10.9% |
| 12 Oct 2022 | Ro Khanna (D-CA) | sell | 1K–15K | 31 | n/a |
| 12 Oct 2022 | Kathy Manning (D-NC) | buy | 1K–15K | 29 | +12.3% |
| 12 Oct 2022 | Ro Khanna (D-CA) | sell | 1K–15K | 8 | n/a |
| 6 Oct 2022 | Earl Blumenauer (D-OR) | sell | 15K–50K | 20 | n/a |
| 15 Sep 2022 | Kathy Manning (D-NC) | sell | 1K–15K | 40 | n/a |
| 5 Sep 2022 | Carol Miller (R-WV) | sell | 15K–50K | 401 | n/a |
| 12 Aug 2022 | Ro Khanna (D-CA) | sell | 15K–50K | 33 | n/a |
| 12 Aug 2022 | Ro Khanna (D-CA) | sell | 1K–15K | 29 | n/a |
| 12 Aug 2022 | Ro Khanna (D-CA) | sell | 1K–15K | 33 | n/a |
| 11 Aug 2022 | Kathy Manning (D-NC) | buy | 1K–15K | 26 | +20.1% |
| 2 Aug 2022 | Diana Harshbarger (R-TN) | buy | 1K–15K | 37 | +21.6% |
| 2 Aug 2022 | Diana Harshbarger (R-TN) | buy | 1K–15K | 37 | +21.6% |
| 11 Jul 2022 | Ro Khanna (D-CA) | sell | 15K–50K | 8 | n/a |
| 11 Jul 2022 | Ro Khanna (D-CA) | sell | 1K–15K | 8 | n/a |
| 11 Jul 2022 | Ro Khanna (D-CA) | buy | 15K–50K | 21 | +2.5% |
| 2 Jul 2022 | Tomasz Malinowski (D-NJ) | sell | 15K–50K | 602 | n/a |
| 17 Jun 2022 | Lois Frankel (D-FL) | sell | 1K–15K | 15 | n/a |
| 15 Jun 2022 | Ro Khanna (D-CA) | buy | 1K–15K | 36 | -4.8% |
| 15 Jun 2022 | Ro Khanna (D-CA) | buy | 1K–15K | 31 | -4.8% |
| 15 Jun 2022 | Ro Khanna (D-CA) | sell | 1K–15K | 23 | n/a |
| 15 Jun 2022 | Ro Khanna (D-CA) | sell | 15K–50K | 22 | n/a |
Nothing matches that search.
Insider trades in MRK
as of 2026-08-13| Filed | Insider | Type | Shares | Price | Value | 90 day vs S&P |
|---|---|---|---|---|---|---|
| 13 Aug 2026 | Guindo Chirfi | sell | 10,000 | $135.00 | $1.4M | n/a |
| 13 Aug 2026 | Zachary Jennifer | sell | 80,315 | $133.46 | $11M | n/a |
| 12 Aug 2026 | DeLuca Richard R. | sell | 11,699 | $131.63 | $1.5M | n/a |
| 12 Aug 2026 | DeLuca Richard R. | sell | 20,784 | $130.43 | $2.7M | n/a |
| 12 Aug 2026 | DeLuca Richard R. | sell | 12,837 | $131.76 | $1.7M | n/a |
| 10 Aug 2026 | DeLuca Richard R. | sell | 6,050 | $130.38 | $789K | n/a |
| 7 Aug 2026 | Maraldo David R. | sell | 18,706 | $128.72 | $2.4M | n/a |
| 7 Aug 2026 | Williams David Michael | sell | 52,847 | $128.77 | $6.8M | n/a |
| 7 Aug 2026 | Guindo Chirfi | sell | 15,000 | $131.00 | $2.0M | n/a |
Nothing matches that search.
Related pages
Frequently asked questions
Who has bought MRK?
87 Congress buys by 39 members and 0 insider buys are on file. The tables on this page list every one.
Did buying MRK after a disclosure beat the market?
Across 48 scored buys, Congress averaged +2.2% against the S&P 500 (SPY) over the 90 days after disclosure, with 56% of them ahead of the index. That result is not distinguishable from luck. A single stock is a small sample.
Sources: Congressional trades: STOCK Act disclosures, collected from CapitolTrades. Insider trades: SEC Form 4 filings, collected from Finviz. Prices: Yahoo Finance daily adjusted closes. Data as of 2026-09-29 (29 September 2026). About these sources.
Not investment advice. Past disclosed trades do not predict future returns. Disclosures are published late, so the trades shown are ones you could only have copied after the fact. Talk to a licensed adviser before you invest.