Merck & Co., Inc.
BG ˙ BUL ˙ US58933Y1055
SecurityBG:6MK / Merck & Co., Inc.
InstitutionFranklin Resources Inc
Latest Disclosed Ownership16,267,205 shares
Latest Disclosed Value $ 1,956,782,124
Franklin Resources Inc reports 1.26% increase in ownership of 6MK / Merck & Co., Inc.

On May 13, 2026 - Franklin Resources Inc filed a 13F-HR form disclosing ownership of 16,267,205 shares of Merck & Co., Inc. (BG:6MK) valued at $1,956,782,124 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 11, 2026 disclosing 16,064,050 shares of Merck & Co., Inc.. This represents a change in shares of 1.26% 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)
2026-05-13 2026-03-31 13F MERCK COM 58933Y105 16,267,205 203,155 1.26 1,956,782 15.72 0.0779
2026-02-11 2025-12-31 13F MERCK COM 58933Y105 16,064,050 -682,940 -4.08 1,690,902 20.30 0.4149
2025-11-13 2025-09-30 13F MERCK COM 58933Y105 16,746,990 -10,285,611 -38.05 1,405,575 -34.32 0.3505
2025-08-12 2025-06-30 13F MERCK COM 58933Y105 27,032,601 5,135,748 23.45 2,139,901 8.88 0.5673
2025-05-13 2025-03-31 13F MERCK COM 58933Y105 21,896,853 2,024,409 10.19 1,965,462 -0.58 0.5655
2025-02-12 2024-12-31 13F MERCK COM 58933Y105 19,872,444 3,823,283 23.82 1,976,911 12.34 0.5489
2024-11-27 2024-09-30 13F/A-1 MERCK COM 58933Y105 16,049,161 1,836,505 12.92 1,759,800 0.02 0.4942
2024-11-12 2024-09-30 13F MERCK COM 58933Y105 16,110,807 1,898,151 1,767,194 0.0851
2024-08-14 2024-06-30 13F MERCK COM 58933Y105 14,212,656 -3,480,612 -19.67 1,759,527 -24.63 0.5409
2024-05-13 2024-03-31 13F MERCK COM 58933Y105 17,693,268 7,578,973 74.93 2,334,627 111.73 0.7392
2024-02-09 2023-12-31 13F MERCK COM 58933Y105 10,114,295 617,022 6.50 1,102,660 12.78 0.5156
2023-11-13 2023-09-30 13F MERCK COM 58933Y105 9,497,273 2,556,466 36.83 977,744 22.08 0.4968
2023-08-11 2023-06-30 13F MERCK COM 58933Y105 6,940,807 840,657 13.78 800,899 23.41 0.3807
2023-05-12 2023-03-31 13F MERCK COM 58933Y105 6,100,150 -123,532 -1.98 648,995 -6.01 0.3257
2023-02-10 2022-12-31 13F MERCK COM 58933Y105 6,223,682 -4,263,655 -40.66 690,518 -23.55 0.3589
2022-11-14 2022-09-30 13F MERCK COM 58933Y105 10,487,337 -998,050 -8.69 903,170 -13.75 0.4922
2022-08-11 2022-06-30 13F MERCK COM 58933Y105 11,485,387 -6,727,813 -36.94 1,047,124 -29.93 0.5193
2022-05-13 2022-03-31 13F MERCK COM 58933Y105 18,213,200 -15,845,328 -46.52 1,494,402 -42.75 0.5972
2022-02-11 2021-12-31 13F MERCK COM 58933Y105 34,058,528 -5,203,831 -13.25 2,610,246 -11.49 0.9414
2021-11-12 2021-09-30 13F MERCK COM 58933Y105 39,262,359 457,650 1.18 2,948,995 -2.28 1.1103
2021-08-13 2021-06-30 13F MERCK COM 58933Y105 38,804,709 3,348,929 9.45 3,017,843 10.41 1.1530
2021-05-13 2021-03-31 13F MERCK & CO. COM 58933Y105 35,455,780 6,063,098 20.63 2,733,289 13.68 1.1121
2021-02-10 2020-12-31 13F MERCK & CO. COM 58933Y105 29,392,682 4,147,525 16.43 2,404,319 14.81 1.0176
2020-11-12 2020-09-30 13F MERCK & CO. COM 58933Y105 25,245,157 1,961,123 8.42 2,094,085 14.16 1.0140
2020-08-13 2020-06-30 13F MERCK & CO. COM 58933Y105 23,284,034 5,206,332 28.80 1,834,308 31.88 0.9450
2020-05-13 2020-03-31 13F MERCK & CO. COM 58933Y105 18,077,702 933,775 5.45 1,390,898 -10.80 0.9285
2020-03-11 2019-12-31 13F/A-1 MERCK COM 58933Y105 17,143,927 -2,342,902 -12.02 1,559,240 -4.75 0.8192
2020-02-12 2019-12-31 13F MERCK COM 58933Y105 17,143,927 -2,342,902 1,559,240 196,953.3595
2019-11-14 2019-09-30 13F MERCK COM 58933Y105 19,486,829 -448,372 -2.25 1,636,921 -2.07 0.8890
2019-08-14 2019-06-30 13F MERCK COM 58933Y105 19,935,201 -6,352,133 -24.16 1,671,567 -23.54 0.8891
2019-05-15 2019-03-31 13F/A-1 MERCK COM 58933Y105 26,287,334 -2,762,634 -9.51 2,186,316 -1.49 1.1710
2019-05-14 2019-03-31 13F MERCK COM 58933Y105 26,287,334 -2,762,634 2,186,316
2019-02-12 2018-12-31 13F MERCK COM 58933Y105 29,049,968 -11,257,974 -27.93 2,219,481 -22.38 1.3395
2018-11-13 2018-09-30 13F MERCK COM 58933Y105 40,307,942 -4,735,134 -10.51 2,859,444 4.58 1.4235
2018-08-14 2018-06-30 13F MERCK COM 58933Y105 45,043,076 -4,058,538 -8.27 2,734,109 2.23 1.4025
2018-05-10 2018-03-31 13F MERCK COM 58933Y105 49,101,614 5,880,457 13.61 2,674,552 9.97 1.3559
2018-02-14 2017-12-31 13F MERCK COM 58933Y105 43,221,157 15,932,771 58.39 2,432,154 39.20 1.1671
2017-11-13 2017-09-30 13F MERCK COM 58933Y105 27,288,386 268,814 0.99 1,747,281 0.90 0.8566
2017-08-10 2017-06-30 13F MERCK COM 58933Y105 27,019,572 801,033 3.06 1,731,684 3.95 0.8635
2017-05-12 2017-03-31 13F MERCK COM 58933Y105 26,218,539 -2,581,799 -8.96 1,665,911 -1.74 0.8455
2017-02-14 2016-12-31 13F MERCK COM 58933Y105 28,800,338 465,771 1.64 1,695,480 -4.11 0.8778
2016-11-14 2016-09-30 13F MERCK COM 58933Y105 28,334,567 -1,660,658 -5.54 1,768,176 2.32 0.9245
2016-08-11 2016-06-30 13F MERCK COM 58933Y105 29,995,225 -15,838,233 -34.56 1,728,030 -28.74 0.9296
2016-05-10 2016-03-31 13F MERCK & CO INC COM 58933Y105 45,833,458 -1,936,697 -4.05 2,425,056 -3.89 1.2873
2016-04-27 2015-12-31 13F/A-1 MERCK & CO INC COM 58933Y105 47,770,155 -2,476,105 -4.93 2,523,235 1.67 1.2774
2016-02-12 2015-12-31 13F MERCK & CO INC COM 58933Y105 47,770,155 2,523,235
2015-11-10 2015-09-30 13F MERCK & CO INC COM 58933Y105 50,246,260 4,161,509 9.03 2,481,676 -5.41 1.2257
2015-08-12 2015-06-30 13F MERCK & CO INC COM 58933Y105 46,084,751 -2,744,100 -5.62 2,623,606 -6.52 1.1909
2015-05-14 2015-03-31 13F MERCK & CO INC COM 58933Y105 48,828,851 -7,729,403 -13.67 2,806,676 -12.62 1.2725
2015-02-10 2014-12-31 13F MERCK & CO INC COM 58933Y105 56,558,254 -9,203,491 -14.00 3,211,950 -17.61 1.4569
2014-11-12 2014-09-30 13F MERCK & CO INC COM 58933Y105 65,761,745 -8,349,595 -11.27 3,898,344 -9.07 1.7780
2014-08-12 2014-06-30 13F MERCK & CO INC COM 58933Y105 74,111,340 101,999 0.14 4,287,317 2.04 1.8886
2014-05-13 2014-03-31 13F MERCK & CO INC COM 58933Y105 74,009,341 -7,697,650 -9.42 4,201,500 2.74 1.9840
2014-02-12 2013-12-31 13F MERCK & CO INC COM 58933Y105 81,706,991 -5,918,712 -6.75 4,089,426 -1.98 1.9989
2013-11-14 2013-09-30 13F MERCK & CO INC COM 58933Y105 87,625,703 -1,798,878 -2.01 4,171,850 0.44 2.2204
2013-08-09 2013-06-30 13F MERCK & CO INC COM 58933Y105 89,424,581 89,424,581 4,153,777 2.3713
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.