Mairs and Power's MRK Position Overview
Mairs and Power (via Mairs & Power INC) currently holds 51,999 shares of Merck & Co., Inc. (MRK) worth $5.47 M, representing 0.05% of the portfolio. First purchased in 2013-Q2, this long-term strategic position has been held for 51 quarters.
Based on 13F filings since 2013, Mairs and Power has maintained a long-term strategic position in MRK, representing a significant commitment to this investment thesis. Largest addition occurred in Q3 2022, adding 18,289 shares. Largest reduction occurred in Q3 2013, reducing 23,983 shares.
Analysis based on 13F filings available since 2013 Q2
Mairs and Power's Merck & Co (MRK) Holding Value Over Time
Track share changes against reported price movement
Quarterly Merck & Co (MRK) Trades by Mairs and Power
| Report Date | Bought/Sold (Sh.) | % Change | Qtr. End Shares | Reported Price |
|---|---|---|---|---|
| Q4 2025 | -188 | Reduce 0.36% | 51,999 | $105.26 |
| Q3 2025 | -4,684 | Reduce 8.24% | 52,187 | $83.93 |
| Q2 2025 | +3,712 | Add 6.98% | 56,871 | $79.16 |
| Q1 2025 | -741 | Reduce 1.37% | 53,159 | $89.76 |
| Q4 2024 | +513 | Add 0.96% | 53,900 | $99.48 |
| Q3 2024 | -1,464 | Reduce 2.67% | 53,387 | $113.56 |
| Q2 2024 | -2,166 | Reduce 3.80% | 54,851 | $123.80 |
| Q1 2024 | -4,967 | Reduce 8.01% | 57,017 | $131.95 |
| Q4 2023 | +2,639 | Add 4.45% | 61,984 | $109.02 |
| Q3 2023 | -388 | Reduce 0.65% | 59,345 | $102.95 |
| Q2 2023 | -7,504 | Reduce 11.16% | 59,733 | $115.39 |
| Q1 2023 | -6,229 | Reduce 8.48% | 67,237 | $106.39 |
| Q4 2022 | -1,666 | Reduce 2.22% | 73,466 | $110.95 |
| Q3 2022 | +18,289 | Add 32.17% | 75,132 | $86.12 |
| Q2 2022 | -3,302 | Reduce 5.49% | 56,843 | $91.16 |
| Q1 2022 | -3,357 | Reduce 5.29% | 60,145 | $82.05 |
| Q4 2021 | -526 | Reduce 0.82% | 63,502 | $76.64 |
| Q3 2021 | -2,925 | Reduce 4.37% | 64,028 | $75.11 |
| Q2 2021 | -12,562 | Reduce 15.80% | 66,953 | $77.77 |
| Q1 2021 | -6,181 | Reduce 7.21% | 79,515 | $73.56 |
| Q4 2020 | +2,783 | Add 3.36% | 85,696 | $78.05 |
| Q3 2020 | -1,797 | Reduce 2.12% | 82,913 | $79.16 |
| Q2 2020 | -863 | Reduce 1.01% | 84,710 | $73.79 |
| Q1 2020 | -916 | Reduce 1.06% | 85,573 | $73.41 |
| Q4 2019 | +2,162 | Add 2.56% | 86,489 | $86.79 |
| Q3 2019 | +2,159 | Add 2.63% | 84,327 | $80.33 |
| Q2 2019 | -4,756 | Reduce 5.47% | 82,168 | $80.01 |
| Q1 2019 | -5,455 | Reduce 5.91% | 86,924 | $79.36 |
| Q4 2018 | -1,137 | Reduce 1.22% | 92,379 | $72.91 |
| Q3 2018 | -1,820 | Reduce 1.91% | 93,516 | $67.69 |
| Q2 2018 | -2,464 | Reduce 2.52% | 95,336 | $57.92 |
| Q1 2018 | +8,309 | Add 9.28% | 97,800 | $51.97 |
| Q4 2017 | -2,946 | Reduce 3.19% | 89,491 | $53.69 |
| Q3 2017 | +3,230 | Add 3.62% | 92,437 | $61.10 |
| Q2 2017 | -5,264 | Reduce 5.57% | 89,207 | $61.15 |
| Q1 2017 | -8,064 | Reduce 7.86% | 94,471 | $60.63 |
| Q4 2016 | +949 | Add 0.93% | 102,535 | $56.18 |
| Q3 2016 | -5,482 | Reduce 5.12% | 101,586 | $59.56 |
| Q2 2016 | +329 | Add 0.31% | 107,068 | $54.97 |
| Q1 2016 | -2,921 | Reduce 2.66% | 106,739 | $50.49 |
| Q4 2015 | +538 | Add 0.49% | 109,660 | $50.40 |
| Q3 2015 | +1,310 | Add 1.22% | 109,122 | $47.13 |
| Q2 2015 | -2,394 | Reduce 2.17% | 107,812 | $54.33 |
| Q1 2015 | -2,647 | Reduce 2.35% | 110,206 | $54.84 |
| Q4 2014 | +995 | Add 0.89% | 112,853 | $54.19 |
| Q3 2014 | -850 | Reduce 0.75% | 111,858 | $56.56 |
| Q2 2014 | -6,986 | Reduce 5.84% | 112,708 | $55.20 |
| Q1 2014 | -17,231 | Reduce 12.58% | 119,694 | $54.17 |
| Q4 2013 | +18,078 | Add 15.21% | 136,925 | $47.76 |
| Q3 2013 | -23,983 | Reduce 16.79% | 118,847 | $45.43 |
| Q2 2013 | +142,830 | Add 0.00% | 142,830 | $44.33 |
Mairs and Power's Merck & Co Investment FAQs
Mairs and Power first purchased Merck & Co., Inc. (MRK) in Q2 2013, acquiring 142,830 shares, as reported in their 13F filing for that period. Note: Analysis reflects filings available since Q2 2013; earlier records may be incomplete.
Mairs and Power has held Merck & Co., Inc. (MRK) for 51 quarters since Q2 2013.
Mairs and Power's largest addition to Merck & Co., Inc. (MRK) was in Q2 2013, adding 142,830 shares worth $6.33 M.
According to the latest 13F filing for Q4 2025, Mairs and Power's firm, Mairs & Power INC, owns 51,999 shares of Merck & Co., Inc. (MRK), valued at approximately $5.47 M.
As of the Q4 2025 filing, Merck & Co., Inc. (MRK) represents approximately 0.05% of Mairs and Power's publicly disclosed stock portfolio, making it one of their key holdings.
Mairs and Power's peak holding in Merck & Co., Inc. (MRK) was 142,830 shares, as reported at the end of Q2 2013.