Merck & Co., Inc.
US ˙ NYSE ˙ US58933Y1055

SecurityMRK / Merck & Co., Inc.
InstitutionIngalls & Snyder Llc
Latest Disclosed Ownership206,731 shares
Latest Disclosed Value $ 24,868
Ingalls & Snyder Llc reports 7.06% decrease in ownership of MRK / Merck & Co., Inc.

On May 13, 2026 - Ingalls & Snyder Llc filed a 13F-HR form disclosing ownership of 206,731 shares of Merck & Co., Inc. (US:MRK) valued at $24,867,672 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 222,429 shares of Merck & Co., Inc.. This represents a change in shares of -7.06% during the quarter. The current value of the position is $23,712,046 USD.

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 206,731 -15,698 -7.06 25 4.35 0.8802
2026-02-13 2025-12-31 13F MERCK COM 58933Y105 222,429 -3,005 -1.33 23 27.78 0.8597
2025-11-07 2025-09-30 13F MERCK COM 58933Y105 225,434 -6,314 -2.72 19 0.00 0.6187
2025-07-31 2025-06-30 13F MERCK COM 58933Y105 231,748 -2,925 -1.25 18 -14.29 0.6508
2025-05-12 2025-03-31 13F MERCK COM 58933Y105 234,673 -6,712 -2.78 21 -12.50 0.6928
2025-01-29 2024-12-31 13F MERCK COM 58933Y105 241,385 -2,189 -0.90 24 -11.11 0.9417
2024-11-14 2024-09-30 13F MERCK COM 58933Y105 243,574 -3,097 -1.26 28 -10.00 1.0794
2024-07-31 2024-06-30 13F MERCK COM 58933Y105 246,671 -1,934 -0.78 31 -6.25 1.3129
2024-05-13 2024-03-31 13F MERCK COM 58933Y105 248,605 -10,973 -4.23 33 14.29 1.4484
2024-01-29 2023-12-31 13F MERCK COM 58933Y105 259,578 -12,001 -4.42 28 3.70 1.2794
2023-11-02 2023-09-30 13F MERCK COM 58933Y105 271,579 -916 -0.34 28 -12.90 1.3459
2023-07-27 2023-06-30 13F MERCK COM 58933Y105 272,495 -6,985 -2.50 31 6.90 1.5057
2023-05-09 2023-03-31 13F MERCK COM 58933Y105 279,480 -1,461 -0.52 30 -6.45 1.5276
2023-01-31 2022-12-31 13F MERCK COM 58933Y105 280,941 -7,439 -2.58 31 -99.88 1.6952
2022-10-21 2022-09-30 13F MERCK COM 58933Y105 288,380 -2,240 -0.77 24,835 -6.27 1.3861
2022-08-11 2022-06-30 13F MERCK COM 58933Y105 290,620 982 0.34 26,496 11.49 1.3847
2022-05-09 2022-03-31 13F MERCK COM 58933Y105 289,638 1,539 0.53 23,765 7.63 1.0614
2022-02-11 2021-12-31 13F MERCK COM 58933Y105 288,099 -10,930 -3.66 22,080 -1.69 0.9957
2021-10-27 2021-09-30 13F MERCK COM 58933Y105 299,029 -16,129 -5.12 22,460 -8.36 1.0285
2021-08-03 2021-06-30 13F MERCK COM 58933Y105 315,158 -3,837 -1.20 24,510 -0.33 1.0885
2021-04-21 2021-03-31 13F MERCK & CO. CO 58933Y105 318,995 7,119 2.28 24,591 -3.61 1.1480
2021-01-27 2020-12-31 13F MERCK & CO. COM 58933Y105 311,876 10,406 3.45 25,511 2.02 1.2595
2020-10-21 2020-09-30 13F MERCK & CO. COM 58933Y105 301,470 -1,475 -0.49 25,007 6.74 1.7161
2020-07-31 2020-06-30 13F MERCK & CO. COM 58933Y105 302,945 667 0.22 23,427 0.73 1.3456
2020-04-22 2020-03-31 13F MERCK & CO. COM 58933Y105 302,278 11,731 4.04 23,257 -11.99 1.5673
2020-01-15 2019-12-31 13F MERCK COM 58933Y105 290,547 -959 -0.33 26,425 7.69 1.4306
2019-10-16 2019-09-30 13F MERCK COM 58933Y105 291,506 -11,794 -3.89 24,539 -3.51 1.1975
2019-07-11 2019-06-30 13F MERCK COM 58933Y105 303,300 14 0.00 25,432 0.82 1.2231
2019-04-11 2019-03-31 13F MERCK COM 58933Y105 303,286 -5,224 -1.69 25,224 7.00 1.2019
2019-01-24 2018-12-31 13F MERCK COM 58933Y105 308,510 -7,131 -2.26 23,573 5.27 1.2445
2018-10-24 2018-09-30 13F MERCK COM 58933Y105 315,641 -2,045 -0.64 22,392 16.12 0.9436
2018-08-10 2018-06-30 13F MERCK COM 58933Y105 317,686 -1,085 -0.34 19,284 11.06 0.8950
2018-04-17 2018-03-31 13F MERCK COM 58933Y105 318,771 -25,172 -7.32 17,363 -10.29 0.8468
2018-01-19 2017-12-31 13F MERCK COM 58933Y105 343,943 -11,307 -3.18 19,354 -14.92 0.8907
2017-10-20 2017-09-30 13F MERCK COM 58933Y105 355,250 17,550 5.20 22,747 5.10 1.1848
2017-07-28 2017-06-30 13F MERCK COM 58933Y105 337,700 7,837 2.38 21,643 3.26 1.1751
2017-05-09 2017-03-31 13F MERCK COM 58933Y105 329,863 5,712 1.76 20,959 9.83 1.1180
2017-01-25 2016-12-31 13F MERCK COM 58933Y105 324,151 -4,636 -1.41 19,083 -7.00 1.0391
2016-11-03 2016-09-30 13F MERCK COM 58933Y105 328,787 -6,586 -1.96 20,520 6.21 1.1443
2016-08-11 2016-06-30 13F MERCK COM 58933Y105 335,373 6,718 2.04 19,321 11.11 1.1400
2016-04-29 2016-03-31 13F MERCK & CO INC COMMON 058933Y10 328,655 11,163 3.52 17,389 3.70 1.1057
2016-01-27 2015-12-31 13F MERCK & CO INC COMMON 058933Y10 317,492 36,633 13.04 16,769 20.89 1.0714
2015-10-27 2015-09-30 13F MERCK & CO INC COMMON 058933Y10 280,859 17,243 6.54 13,871 -7.57 0.9068
2015-07-10 2015-06-30 13F MERCK & CO INC COMMON 058933Y10 263,616 4,044 1.56 15,007 0.58 0.8279
2015-04-15 2015-03-31 13F MERCK & CO INC COMMON 058933Y10 259,572 259,572 14,920 0.8216
2015-01-28 2014-12-31 13F MERCK & CO INC COMMON 058933Y10 0 -226,833 -100.00 0 -100.00
2014-10-28 2014-09-30 13F MERCK & CO INC COMMON 058933Y10 226,833 5,290 2.39 13,446 4.92 0.7234
2014-07-30 2014-06-30 13F MERCK & CO INC COMMON 058933Y10 221,543 3,020 1.38 12,816 3.31 0.6299
2014-05-02 2014-03-31 13F MERCK & CO INC COMMON 058933Y10 218,523 3,149 1.46 12,405 15.08 0.6648
2014-01-24 2013-12-31 13F MERCK & CO INC COMMON 058933Y10 215,374 5,755 2.75 10,779 8.02 0.5941
2013-11-12 2013-09-30 13F MERCK & CO INC COMMON 058933Y10 209,619 -4,043 -1.89 9,979 0.55 0.5966
2013-08-09 2013-06-30 13F/A-1 MERCK & CO INC COMMON 058933Y10 213,662 213,662 9,924 0.6322
2013-08-08 2013-06-30 13F MERCK & CO INC COMMON 058933Y10 168,338 7,819
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.