Merck & Co., Inc.
MX ˙ BMV ˙ US58933Y1055
SecurityMX:MRK / Merck & Co., Inc.
InstitutionPanagora Asset Management Inc
Latest Disclosed Ownership147,569 shares
Latest Disclosed Value $ 17,751,075
Panagora Asset Management Inc reports 79.08% decrease in ownership of MRK / Merck & Co., Inc.

On May 14, 2026 - Panagora Asset Management Inc filed a 13F-HR form disclosing ownership of 147,569 shares of Merck & Co., Inc. (MX:MRK) valued at $17,751,075 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 705,442 shares of Merck & Co., Inc.. This represents a change in shares of -79.08% during the quarter.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-14 2026-03-31 13F MERCK COM 58933Y105 147,569 -557,873 -79.08 17,751 -76.09 0.0665
2026-02-13 2025-12-31 13F MERCK COM 58933Y105 705,442 567,249 410.48 74,255 540.23 0.2632
2025-11-13 2025-09-30 13F MERCK COM 58933Y105 138,193 90,190 187.88 11,599 205.29 0.0467
2025-08-13 2025-06-30 13F MERCK COM 58933Y105 48,003 -770,925 -94.14 3,800 -94.83 0.0171
2025-05-15 2025-03-31 13F MERCK COM 58933Y105 818,928 522,126 175.92 73,507 148.96 0.3672
2025-02-13 2024-12-31 13F MERCK COM 58933Y105 296,802 -976,439 -76.69 29,526 -79.58 0.1365
2024-11-13 2024-09-30 13F MERCK COM 58933Y105 1,273,241 177,951 16.25 144,589 6.63 0.6909
2024-07-29 2024-06-30 13F MERCK COM 58933Y105 1,095,290 44,550 4.24 135,597 -2.20 0.6819
2024-05-07 2024-03-31 13F MERCK COM 58933Y105 1,050,740 -68,602 -6.13 138,645 13.62 0.7227
2024-02-08 2023-12-31 13F MERCK COM 58933Y105 1,119,342 487,428 77.14 122,031 87.58 0.6826
2023-10-31 2023-09-30 13F MERCK COM 58933Y105 631,914 86,144 15.78 65,056 3.30 0.4040
2023-08-11 2023-06-30 13F MERCK COM 58933Y105 545,770 350,552 179.57 62,976 203.22 0.3710
2023-05-12 2023-03-31 13F MERCK COM 58933Y105 195,218 -371,621 -65.56 20,769 -66.98 0.1313
2023-02-13 2022-12-31 13F MERCK COM 58933Y105 566,839 -302,423 -34.79 62,891 -15.99 0.4124
2022-11-14 2022-09-30 13F MERCK COM 58933Y105 869,262 -452,962 -34.26 74,861 -37.90 0.5191
2022-08-15 2022-06-30 13F MERCK COM 58933Y105 1,322,224 150,541 12.85 120,547 25.39 0.7902
2022-05-12 2022-03-31 13F MERCK COM 58933Y105 1,171,683 742,473 172.99 96,137 192.25 0.5236
2022-02-10 2021-12-31 13F MERCK COM 58933Y105 429,210 164,536 62.17 32,895 65.47 0.1742
2021-11-10 2021-09-30 13F MERCK COM 58933Y105 264,674 -59,801 -18.43 19,880 -21.22 0.1062
2021-08-11 2021-06-30 13F MERCK COM 58933Y105 324,475 -89,554 -21.63 25,234 -20.94 0.1352
2021-05-12 2021-03-31 13F MERCK COMMON 58933Y105 414,029 -961,508 -69.90 31,917 -71.63 0.1792
2021-02-10 2020-12-31 13F MERCK COMMON 58933Y105 1,375,537 -159,068 -10.37 112,519 -11.61 0.6658
2020-11-13 2020-09-30 13F MERCK COMMON 58933Y105 1,534,605 -131,603 -7.90 127,295 -1.21 0.7974
2020-08-12 2020-06-30 13F MERCK COMMON 58933Y105 1,666,208 -147,978 -8.16 128,848 -7.69 0.8213
2020-05-14 2020-03-31 13F MERCK COMMON 58933Y105 1,814,186 206,336 12.83 139,584 -4.55 0.9873
2020-02-12 2019-12-31 13F MERCK COMMON 58933Y105 1,607,850 484,356 43.11 146,234 54.62 0.6641
2019-11-12 2019-09-30 13F MERCK COMMON 58933Y105 1,123,494 84,427 8.13 94,576 8.55 0.4363
2019-08-09 2019-06-30 13F MERCK COMMON 58933Y105 1,039,067 -62,363 -5.66 87,126 -4.89 0.3896
2019-05-15 2019-03-31 13F MERCK COMMON 58933Y105 1,101,430 271,757 32.75 91,606 44.50 0.4073
2019-02-14 2018-12-31 13F MERCK COMMON 58933Y105 829,673 -322,376 -27.98 63,395 -22.43 0.2951
2018-11-13 2018-09-30 13F MERCK COMMON 58933Y105 1,152,049 4,363 0.38 81,726 17.31 0.3076
2018-08-14 2018-06-30 13F MERCK COMMON 58933Y105 1,147,686 -537,188 -31.88 69,665 -24.09 0.2762
2018-05-15 2018-03-31 13F MERCK COMMON 58933Y105 1,684,874 -1,605,621 -48.80 91,775 -50.43 0.3620
2018-02-14 2017-12-31 13F MERCK COMMON 58933Y105 3,290,495 -637,870 -16.24 185,156 -26.39 0.6947
2017-11-14 2017-09-30 13F MERCK COMMON 58933Y105 3,928,365 -155,003 -3.80 251,533 -3.89 0.9959
2017-08-14 2017-06-30 13F MERCK COMMON 58933Y105 4,083,368 -46,846 -1.13 261,703 -0.28 1.0533
2017-05-15 2017-03-31 13F MERCK COMMON 58933Y105 4,130,214 1,472,791 55.42 262,434 67.75 1.0928
2017-02-14 2016-12-31 13F MERCK COMMON 58933Y105 2,657,423 137,437 5.45 156,442 -0.53 0.7166
2016-11-14 2016-09-30 13F MERCK COMMON 58933Y105 2,519,986 381,865 17.86 157,272 27.68 0.7497
2016-08-15 2016-06-30 13F MERCK COMMON 58933Y105 2,138,121 673,710 46.01 123,177 58.97 0.6116
2016-05-16 2016-03-31 13F MERCK COMMON 58933Y105 1,464,411 -590,050 -28.72 77,482 -28.60 0.3846
2016-02-12 2015-12-31 13F MERCK COMMON 58933Y105 2,054,461 -75,437 -3.54 108,517 3.16 0.5347
2015-11-13 2015-09-30 13F MERCK COMMON 58933Y105 2,129,898 -296,923 -12.24 105,196 -23.86 0.5553
2015-08-14 2015-06-30 13F MERCK COMMON 58933Y105 2,426,821 40,023 1.68 138,159 0.70 0.6925
2015-05-15 2015-03-31 13F MERCK COMMON 58933Y105 2,386,798 -107,172 -4.30 137,193 -3.13 0.6965
2015-02-13 2014-12-31 13F MERCK COMMON 58933Y105 2,493,970 -300,316 -10.75 141,633 -14.50 0.7244
2014-11-12 2014-09-30 13F MERCK COMMON 58933Y105 2,794,286 153,392 5.81 165,645 8.42 0.8026
2014-08-14 2014-06-30 13F MERCK COMMON 58933Y105 2,640,894 186,535 7.60 152,776 9.65 0.7416
2014-05-15 2014-03-31 13F MERCK COMMON 58933Y105 2,454,359 92,607 3.92 139,334 17.87 0.6580
2014-02-21 2013-12-31 13F MERCK COMMON 58933Y105 2,361,752 -123,275 -4.96 118,206 -0.09 0.5473
2013-11-14 2013-09-30 13F MERCK COMMON 58933Y105 2,485,027 43,891 1.80 118,312 4.34 0.5812
2013-08-14 2013-06-30 13F MERCK COMMON 58933Y105 2,441,136 2,441,136 113,391 0.5799
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.