Renaissance Technologies (RenTech)'s MRK Position Overview
Renaissance Technologies (RenTech) (via Renaissance Technologies LLC) currently holds 4,357 shares of Merck & Co., Inc. (MRK) worth $632,802, representing 0.00% of the portfolio. First purchased in 2013-Q3, this long-term strategic position has been held for 46 quarters.
Based on 13F filings since 2013, Renaissance Technologies (RenTech) has maintained a long-term strategic position in MRK, representing a significant commitment to this investment thesis. Largest addition occurred in Q1 2017, adding 7.72 M shares. Largest reduction occurred in Q4 2017, reducing 4.19 M shares.
Analysis based on 13F filings available since 2013 Q2
Renaissance Technologies (RenTech)'s Merck & Co (MRK) Holding Value Over Time
Track share changes against reported price movement
Quarterly Merck & Co (MRK) Trades by Renaissance Technologies (RenTech)
| Report Date | Bought/Sold (Sh.) | % Change | Qtr. End Shares | Reported Price |
|---|---|---|---|---|
| Q3 2026 | +4,357 | New Buy | 4,357 | $145.24 |
| Q3 2025 | -139,820 | Sold Out | 0 | $0.00 |
| Q2 2025 | -81,872 | Reduce 36.93% | 139,820 | $79.16 |
| Q1 2025 | -1.16 M | Reduce 83.95% | 221,692 | $89.76 |
| Q4 2024 | +295,758 | Add 27.24% | 1.38 M | $99.48 |
| Q3 2024 | +1.08 M | Add 21993.14% | 1.09 M | $113.56 |
| Q2 2024 | -195,287 | Reduce 97.54% | 4,915 | $124.05 |
| Q1 2024 | +80,378 | Add 67.08% | 200,202 | $131.95 |
| Q4 2023 | -247,819 | Reduce 67.41% | 119,824 | $109.02 |
| Q3 2023 | -600,509 | Reduce 62.03% | 367,643 | $102.95 |
| Q2 2023 | -1.68 M | Reduce 63.46% | 968,152 | $0.12 |
| Q1 2023 | +969,157 | Add 57.68% | 2.65 M | $0.11 |
| Q4 2022 | -2.88 M | Reduce 63.18% | 1.68 M | $0.11 |
| Q3 2022 | -2.2 M | Reduce 32.54% | 4.56 M | $86.12 |
| Q2 2022 | +1.66 M | Add 32.64% | 6.76 M | $91.17 |
| Q1 2022 | +4.92 M | Add 2671.38% | 5.1 M | $82.05 |
| Q4 2021 | -1.32 M | Reduce 87.73% | 184,000 | $76.64 |
| Q3 2021 | +740,200 | Add 97.55% | 1.5 M | $75.11 |
| Q2 2021 | +227,009 | Add 42.69% | 758,800 | $77.77 |
| Q1 2021 | +502,222 | Add 1698.47% | 531,791 | $73.56 |
| Q4 2020 | -1.25 M | Reduce 97.69% | 29,569 | $78.05 |
| Q3 2020 | -2.64 M | Reduce 67.28% | 1.28 M | $79.15 |
| Q2 2020 | -3.3 M | Reduce 45.73% | 3.92 M | $73.79 |
| Q1 2020 | +1.28 M | Add 21.49% | 7.22 M | $73.42 |
| Q4 2019 | +1.7 M | Add 40.17% | 5.95 M | $86.78 |
| Q3 2019 | +2.86 M | Add 207.23% | 4.24 M | $80.32 |
| Q2 2019 | +1.38 M | New Buy | 1.38 M | $80.01 |
| Q1 2018 | -17,711 | Sold Out | 0 | $0.00 |
| Q4 2017 | -4.19 M | Reduce 99.58% | 17,711 | $53.70 |
| Q3 2017 | -605,818 | Reduce 12.59% | 4.21 M | $61.10 |
| Q2 2017 | -2.9 M | Reduce 37.63% | 4.81 M | $61.15 |
| Q1 2017 | +7.72 M | New Buy | 7.72 M | $60.63 |
| Q4 2016 | -1.37 M | Sold Out | 0 | $0.00 |
| Q3 2016 | -1.7 M | Reduce 55.46% | 1.37 M | $59.55 |
| Q2 2016 | +2.56 M | Add 504.24% | 3.07 M | $54.97 |
| Q1 2016 | -1.33 M | Reduce 72.36% | 507,582 | $50.49 |
| Q4 2015 | +304,444 | Add 19.87% | 1.84 M | $50.40 |
| Q3 2015 | -482,080 | Reduce 23.94% | 1.53 M | $47.13 |
| Q2 2015 | +762,488 | Add 60.93% | 2.01 M | $54.32 |
| Q1 2015 | +648,235 | Add 107.46% | 1.25 M | $54.85 |
| Q4 2014 | -222,186 | Reduce 26.92% | 603,254 | $54.19 |
| Q3 2014 | -8,280 | Reduce 0.99% | 825,440 | $56.56 |
| Q2 2014 | +628,102 | Add 305.47% | 833,720 | $55.20 |
| Q1 2014 | -1.91 M | Reduce 90.28% | 205,618 | $54.17 |
| Q4 2013 | +1.85 M | Add 700.05% | 2.12 M | $47.76 |
| Q3 2013 | +264,410 | New Buy | 264,410 | $45.43 |
Renaissance Technologies (RenTech)'s Merck & Co Investment FAQs
Renaissance Technologies (RenTech) first purchased Merck & Co., Inc. (MRK) in Q3 2013, acquiring 264,410 shares, as reported in their 13F filing for that period. Note: Analysis reflects filings available since Q2 2013; earlier records may be incomplete.
Renaissance Technologies (RenTech) has held Merck & Co., Inc. (MRK) for 46 quarters since Q3 2013.
Renaissance Technologies (RenTech)'s largest addition to Merck & Co., Inc. (MRK) was in Q1 2017, adding 7,716,460 shares worth $467.85 M.
According to the latest 13F filing for Q3 2026, Renaissance Technologies (RenTech)'s firm, Renaissance Technologies LLC, owns 4,357 shares of Merck & Co., Inc. (MRK), valued at approximately $632,802.
As of the Q3 2026 filing, Merck & Co., Inc. (MRK) represents approximately 0.00% of Renaissance Technologies (RenTech)'s publicly disclosed stock portfolio, making it one of their key holdings.
Renaissance Technologies (RenTech)'s peak holding in Merck & Co., Inc. (MRK) was 7,716,460 shares, as reported at the end of Q1 2017.