Merck & Co., Inc.
BG ˙ BUL ˙ US58933Y1055
SecurityBG:6MK / Merck & Co., Inc.
InstitutionAllstate Corp
Latest Disclosed Ownership256,773 shares
Latest Disclosed Value $ 30,887,225
Allstate Corp reports 35.89% increase in ownership of 6MK / Merck & Co., Inc.

On May 11, 2026 - Allstate Corp filed a 13F-HR form disclosing ownership of 256,773 shares of Merck & Co., Inc. (BG:6MK) valued at $30,887,225 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 9, 2026 disclosing 188,959 shares of Merck & Co., Inc.. This represents a change in shares of 35.89% 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)
2026-05-11 2026-03-31 13F MERCK & CO ORD Equity 58933Y105 256,773 67,814 35.89 30,887 55.30 0.3303
2026-02-09 2025-12-31 13F MERCK & CO ORD Equity 58933Y105 188,959 98,204 108.21 19,890 161.11 0.2717
2025-10-29 2025-09-30 13F MERCK & CO ORD Equity 58933Y105 90,755 86,414 1,990.65 7,617 2,120.70 0.1739
2025-08-05 2025-06-30 13F MERCK & CO ORD Equity 58933Y105 4,341 -81,882 -94.97 344 -95.57 0.0248
2025-05-14 2025-03-31 13F MERCK & CO ORD Equity 58933Y105 86,223 10,927 14.51 7,739 3.32 0.2274
2025-02-12 2024-12-31 13F MERCK & CO ORD Equity 58933Y105 75,296 72,987 3,160.98 7,490 2,758.78 0.2206
2024-11-14 2024-09-30 13F MERCK EQU 58933Y105 2,309 -6,205 -72.88 262 -75.14 0.0249
2024-08-13 2024-06-30 13F MERCK EQU 58933Y105 8,514 5 0.06 1,054 -6.06 0.0855
2024-05-10 2024-03-31 13F MERCK EQU 58933Y105 8,509 110 1.31 1,123 22.62 0.0797
2024-02-09 2023-12-31 13F MERCK EQU 58933Y105 8,399 -185 -2.16 916 3.62 0.0632
2023-11-13 2023-09-30 13F MERCK EQU 58933Y105 8,584 0 0.00 884 -10.81 0.0517
2023-08-14 2023-06-30 13F MERCK EQU 58933Y105 8,584 0 0.00 991 8.43 0.0631
2023-05-10 2023-03-31 13F MERCK EQU 58933Y105 8,584 -100,418 -92.12 913 -92.45 0.0678
2023-02-14 2022-12-31 13F MERCK EQU 58933Y105 109,002 1,160 1.08 12,094 30.21 0.3678
2022-11-14 2022-09-30 13F MERCK EQU 58933Y105 107,842 -636 -0.59 9,287 -6.10 0.2673
2022-08-15 2022-06-30 13F MERCK EQU 58933Y105 108,478 -239 -0.22 9,890 10.87 0.3044
2022-05-16 2022-03-31 13F MERCK EQU 58933Y105 108,717 -116,330 -51.69 8,920 -48.28 0.2382
2022-02-15 2021-12-31 13F MERCK EQU 58933Y105 225,047 175,608 355.20 17,248 364.53 0.3294
2021-11-15 2021-09-30 13F MERCK EQU 58933Y105 49,439 -3,771 -7.09 3,713 -10.27 0.1535
2021-08-16 2021-06-30 13F MERCK EQU 58933Y105 53,210 525 1.00 4,138 1.90 0.1387
2021-05-14 2021-03-31 13F MERCK & CO. EQU 58933Y105 52,685 -6,863 -11.53 4,061 -16.63 0.1274
2021-02-12 2020-12-31 13F MERCK & CO. EQU 58933Y105 59,548 -9,846 -14.19 4,871 -15.38 0.1512
2020-11-13 2020-09-30 13F MERCK & CO. EQU 58933Y105 69,394 -8,840 -11.30 5,756 -4.86 0.1868
2020-08-13 2020-06-30 13F MERCK & CO. EQU 58933Y105 78,234 -23,397 -23.02 6,050 -22.62 0.2079
2020-05-15 2020-03-31 13F MERCK & CO. COMMON 58933Y105 101,631 -148,914 -59.44 7,819 -65.69 0.3062
2020-02-14 2019-12-31 13F MERCK COMMON 58933Y105 250,545 -24 -0.01 22,787 8.03 0.4134
2019-11-14 2019-09-30 13F MERCK COMMON 58933Y105 250,569 22 0.01 21,093 0.40 0.3629
2019-08-14 2019-06-30 13F MERCK COMMON 58933Y105 250,547 7 0.00 21,008 0.82 0.3752
2019-05-20 2019-03-31 13F MERCK COMMON 58933Y105 250,540 -419 -0.17 20,837 8.66 0.5617
2019-02-13 2018-12-31 13F MERCK COMMON 58933Y105 250,959 250,959 19,176 0.6298
2017-11-14 2017-09-30 13F MERCK COMMON 58933Y105 0 -55,030 -100.00 0 -100.00
2017-08-14 2017-06-30 13F MERCK COMMON 58933Y105 55,030 -2,871 -4.96 3,527 -4.13 0.1874
2017-05-15 2017-03-31 13F MERCK COMMON 58933Y105 57,901 -68,233 -54.10 3,679 -50.46 0.2229
2017-02-14 2016-12-31 13F MERCK COMMON 58933Y105 126,134 31,132 32.77 7,426 25.25 0.4440
2016-11-14 2016-09-30 13F MERCK COMMON 58933Y105 95,002 -25,608 -21.23 5,929 -14.67 0.4182
2016-08-11 2016-06-30 13F MERCK COMMON 58933Y105 120,610 -22,026 -15.44 6,948 -7.94 0.4546
2016-05-16 2016-03-31 13F MERCK & CO INC COMMON 58933Y105 142,636 57,529 67.60 7,547 67.90 0.6507
2016-02-16 2015-12-31 13F MERCK & CO INC COMMON 58933Y105 85,107 14,023 19.73 4,495 28.03 0.4278
2015-11-16 2015-09-30 13F MERCK & CO INC COMMON 58933Y105 71,084 -1,539 -2.12 3,511 -15.07 0.3616
2015-08-13 2015-06-30 13F MERCK & CO INC COMMON 58933Y105 72,623 -33,830 -31.78 4,134 -32.44 0.3685
2015-05-15 2015-03-31 13F MERCK & CO INC COMMON 58933Y105 106,453 -49,128 -31.58 6,119 -30.74 0.5122
2015-02-13 2014-12-31 13F MERCK & CO INC COMMON 58933Y105 155,581 -78,461 -33.52 8,835 -36.32 0.6767
2014-11-14 2014-09-30 13F MERCK & CO INC COMMON 58933Y105 234,042 -127,065 -35.19 13,874 -33.59 0.6313
2014-08-14 2014-06-30 13F MERCK & CO INC COMMON 58933Y105 361,107 116,956 47.90 20,890 50.72 0.5649
2014-05-15 2014-03-31 13F MERCK & CO INC COMMON 58933Y105 244,151 95,184 63.90 13,860 85.89 0.4465
2014-02-14 2013-12-31 13F MERCK & CO INC COMMON 58933Y105 148,967 32,144 27.52 7,456 34.05 0.2764
2013-11-12 2013-09-30 13F MERCK & CO INC COMMON 58933Y105 116,823 0 0.00 5,562 2.51 0.2159
2013-08-13 2013-06-30 13F MERCK & CO INC COMMON 58933Y105 116,823 116,823 5,426 0.2476
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.