머크 앤 컴퍼니(Merck & Co., Inc.)
MX ˙ BMV ˙ US58933Y1055
SecurityMX:MRK / Merck & Co., Inc.
InstitutionFred Alger Management, Llc
Latest Disclosed Ownership321,001 shares
Latest Disclosed Value $ 38,659,364
Fred Alger Management, Llc reports 625.41% increase in ownership of MRK / Merck & Co., Inc.

On May 15, 2026 - Fred Alger Management, Llc filed a 13F-HR form disclosing ownership of 321,001 shares of Merck & Co., Inc. (MX:MRK) valued at $38,659,364 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 44,251 shares of Merck & Co., Inc.. This represents a change in shares of 625.41% 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)
2026-05-15 2026-03-31 13F Merck Equity 58933Y105 321,001 276,750 625.41 38,659 723.41 0.1080
2026-02-17 2025-12-31 13F Merck Equity 58933Y105 44,251 13,502 43.91 4,696 80.23 0.0184
2025-11-14 2025-09-30 13F Merck Equity 58933Y105 30,749 10,520 52.00 2,606 61.10 0.0101
2025-08-14 2025-06-30 13F Merck Equity 58933Y105 20,229 -25,221 -55.49 1,617 -60.70 0.0072
2025-05-16 2025-03-31 13F Merck Equity 58933Y105 45,450 35,952 378.52 4,115 333.16 0.0234
2025-02-14 2024-12-31 13F Merck Equity 58933Y105 9,498 -33,128 -77.72 951 -80.37 0.0045
2024-11-14 2024-09-30 13F MERCK Common 58933Y105 42,626 -50,673 -54.31 4,841 -58.10 0.0235
2024-08-14 2024-06-30 13F MERCK Common 58933Y105 93,299 23,589 33.84 11,550 25.57 0.0562
2024-05-15 2024-03-31 13F MERCK Common 58933Y105 69,710 32,715 88.43 9,198 128.07 0.0456
2024-02-14 2023-12-31 13F MERCK Common 58933Y105 36,995 2,612 7.60 4,033 13.96 0.0218
2023-11-14 2023-09-30 13F MERCK Common 58933Y105 34,383 -274 -0.79 3,540 -11.50 0.0188
2023-11-14 2023-09-30 13F MERCK Common 58933Y105 34,383 -274 3,540 0.0188
2023-08-14 2023-06-30 13F MERCK Common 58933Y105 34,657 0 0.00 3,999 8.46 0.0204
2023-05-16 2023-03-31 13F/A-1 MERCK Common 58933Y105 34,657 -74,703 -68.31 3,687 -69.61 0.0197
2023-05-15 2023-03-31 13F MERCK Common 58933Y105 34,657 -74,703 3,687 0.0183
2023-02-14 2022-12-31 13F MERCK Common 58933Y105 109,360 33,682 44.51 12,133 86.17 0.0658
2022-11-15 2022-09-30 13F MERCK Common 58933Y105 75,678 -48,543 -39.08 6,517 -42.45 0.0330
2022-08-15 2022-06-30 13F MERCK Common 58933Y105 124,221 98,191 377.22 11,325 430.20 0.0529
2022-05-16 2022-03-31 13F MERCK Common 58933Y105 26,030 1,511 6.16 2,136 13.68 0.0068
2022-02-14 2021-12-31 13F MERCK Common 58933Y105 24,519 -2,722 -9.99 1,879 -8.16 0.0047
2021-11-15 2021-09-30 13F MERCK Common 58933Y105 27,241 0 0.00 2,046 -3.45 0.0049
2021-08-16 2021-06-30 13F MERCK Common 58933Y105 27,241 0 0.00 2,119 0.90 0.0050
2021-05-17 2021-03-31 13F MERCK Common 58933Y105 27,241 0 0.00 2,100 -5.75 0.0055
2021-02-16 2020-12-31 13F MERCK Common 58933Y105 27,241 0 0.00 2,228 -1.42 0.0058
2020-11-13 2020-09-30 13F MERCK Common 58933Y105 27,241 -30,000 -52.41 2,260 -48.94 0.0066
2020-08-14 2020-06-30 13F MERCK Common 58933Y105 57,241 -40,000 -41.13 4,426 -40.84 0.0146
2020-05-19 2020-03-31 13F/A-1 MERCK Common 58933Y105 97,241 -60,818 -38.48 7,482 -47.95 0.0329
2020-05-15 2020-03-31 13F MERCK Common 58933Y105 97,241 -60,818 7,482 32,918.9688
2020-02-14 2019-12-31 13F MERCK Common 58933Y105 158,059 -10,000 -5.95 14,375 1.61 0.0529
2019-11-14 2019-09-30 13F MERCK Common 58933Y105 168,059 1,249 0.75 14,147 1.14 0.0555
2019-08-14 2019-06-30 13F MERCK Common 58933Y105 166,810 -5,389 -3.13 13,987 -2.34 0.0537
2019-05-14 2019-03-31 13F MERCK Common 58933Y105 172,199 65,212 60.95 14,322 75.19 0.0570
2019-02-14 2018-12-31 13F MERCK Common 58933Y105 106,987 101,302 1,781.92 8,175 1,928.54 0.0376
2018-11-14 2018-09-30 13F MERCK Common 58933Y105 5,685 0 0.00 403 16.81 0.0015
2018-07-19 2018-06-30 13F MERCK Common 58933Y105 5,685 0 0.00 345 11.29 0.0014
2018-05-10 2018-03-31 13F MERCK Common 58933Y105 5,685 0 0.00 310 -3.12 0.0014
2018-02-14 2017-12-31 13F MERCK Common 58933Y105 5,685 -4,859 -46.08 320 -52.59 0.0014
2017-11-14 2017-09-30 13F MERCK Common 58933Y105 10,544 -15,000 -58.72 675 -58.77 0.0032
2017-08-14 2017-06-30 13F MERCK Common 58933Y105 25,544 15,019 142.70 1,637 144.69 0.0078
2017-05-15 2017-03-31 13F MERCK Common 58933Y105 10,525 -1,795 -14.57 669 -7.72 0.0033
2017-02-14 2016-12-31 13F MERCK Common 58933Y105 12,320 -16,850 -57.76 725 -60.16 0.0039
2016-11-14 2016-09-30 13F MERCK Common 58933Y105 29,170 16,850 136.77 1,820 156.34 0.0093
2016-08-15 2016-06-30 13F MERCK Common 58933Y105 12,320 -1,930 -13.54 710 -5.84 0.0037
2016-05-16 2016-03-31 13F MERCK Common 58933Y105 14,250 0 0.00 754 0.13 0.0038
2016-02-16 2015-12-31 13F MERCK Common 58933Y105 14,250 0 0.00 753 6.96 0.0037
2015-11-16 2015-09-30 13F MERCK Common 58933Y105 14,250 3,545 33.12 704 15.60 0.0038
2015-08-14 2015-06-30 13F MERCK Common 58933Y105 10,705 0 0.00 609 -0.98 0.0027
2015-05-15 2015-03-31 13F MERCK Common 58933Y105 10,705 -117,689 -91.66 615 -91.56 0.0028
2015-02-17 2014-12-31 13F MERCK Common 58933Y105 128,394 -70,690 -35.51 7,291 -38.22 0.0351
2014-11-14 2014-09-30 13F MERCK Common 58933Y105 199,084 -3,851 -1.90 11,802 0.53 0.0574
2014-08-14 2014-06-30 13F MERCK Common 58933Y105 202,935 -1,819,896 -89.97 11,740 -89.78 0.0578
2014-05-15 2014-03-31 13F MERCK Common 58933Y105 2,022,831 1,828,606 941.49 114,836 1,081.32 0.5692
2014-02-14 2013-12-31 13F MERCK Common 58933Y105 194,225 76,100 64.42 9,721 72.85 0.0495
2013-11-14 2013-09-30 13F MERCK Common 58933Y105 118,125 -26,050 -18.07 5,624 -16.02 0.0313
2013-08-14 2013-06-30 13F MERCK Common 58933Y105 144,175 144,175 6,697 0.0398
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.