Merck & Co., Inc.
MX ˙ BMV ˙ US58933Y1055
SecurityMX:MRK / Merck & Co., Inc.
InstitutionChilton Capital Management Llc
Latest Disclosed Ownership29,234 shares
Latest Disclosed Value $ 3,516,558
Chilton Capital Management Llc reports 0.29% increase in ownership of MRK / Merck & Co., Inc.

On May 11, 2026 - Chilton Capital Management Llc filed a 13F-HR form disclosing ownership of 29,234 shares of Merck & Co., Inc. (MX:MRK) valued at $3,516,558 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 29,149 shares of Merck & Co., Inc.. This represents a change in shares of 0.29% 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 COM 58933Y105 29,234 85 0.29 3,517 14.60 0.1224
2026-02-12 2025-12-31 13F MERCK COM 58933Y105 29,149 -1,561 -5.08 3,068 19.05 0.1055
2025-10-31 2025-09-30 13F MERCK COM 58933Y105 30,710 595 1.98 2,577 8.14 0.0866
2025-08-01 2025-06-30 13F MERCK COM 58933Y105 30,115 -1,426 -4.52 2,384 -15.82 0.0871
2025-04-29 2025-03-31 13F MERCK COM 58933Y105 31,541 -47,926 -60.31 2,831 -64.19 0.1221
2025-02-07 2024-12-31 13F MERCK COM 58933Y105 79,467 -210,622 -72.61 7,905 -76.00 0.3320
2024-11-12 2024-09-30 13F MERCK COM 58933Y105 290,089 22,004 8.21 32,943 -0.74 1.3666
2024-08-01 2024-06-30 13F MERCK COM 58933Y105 268,085 16,271 6.46 33,189 -0.11 1.4849
2024-05-07 2024-03-31 13F MERCK COM 58933Y105 251,814 8,801 3.62 33,227 25.41 1.5707
2024-01-18 2023-12-31 13F MERCK COM 58933Y105 243,013 207,243 579.38 26,493 619.53 1.3448
2023-11-14 2023-09-30 13F MERCK COM 58933Y105 35,770 105 0.29 3,683 -10.52 0.2066
2023-08-14 2023-06-30 13F MERCK COM 58933Y105 35,665 1,112 3.22 4,115 11.94 0.2254
2023-05-16 2023-03-31 13F MERCK COM 58933Y105 34,553 903 2.68 3,676 -1.53 0.2118
2023-02-14 2022-12-31 13F MERCK COM 58933Y105 33,650 -4,318 -11.37 3,733 14.16 0.2322
2022-11-14 2022-09-30 13F MERCK COM 58933Y105 37,968 -246 -0.64 3,270 -6.14 0.2171
2022-08-16 2022-06-30 13F MERCK COM 58933Y105 38,214 -341 -0.88 3,484 10.15 0.2121
2022-05-16 2022-03-31 13F MERCK COM 58933Y105 38,555 -4,191 -9.80 3,163 -3.45 0.1656
2022-02-14 2021-12-31 13F MERCK COM 58933Y105 42,746 -1,100 -2.51 3,276 -0.52 0.1661
2021-11-04 2021-09-30 13F MERCK COM 58933Y105 43,846 133 0.30 3,293 -3.15 0.1848
2021-08-16 2021-06-30 13F MERCK COM 58933Y105 43,713 4,816 12.38 3,400 13.37 0.1954
2021-05-12 2021-03-31 13F MERCK & CO. COM 58933Y105 38,897 55 0.14 2,999 -5.60 0.1996
2021-02-16 2020-12-31 13F MERCK & CO. COM 58933Y105 38,842 0 0.00 3,177 -1.40 0.2274
2020-11-13 2020-09-30 13F MERCK & CO. COM 58933Y105 38,842 10,336 36.26 3,222 46.19 0.2506
2020-08-11 2020-06-30 13F MERCK & CO. COM 58933Y105 28,506 -650 -2.23 2,204 -1.74 0.1883
2020-05-15 2020-03-31 13F MERCK & CO. COM 58933Y105 29,156 -80 -0.27 2,243 -15.64 0.2252
2020-02-14 2019-12-31 13F MERCK COM 58933Y105 29,236 -1,482 -4.82 2,659 2.82 0.2117
2019-11-15 2019-09-30 13F MERCK COM 58933Y105 30,718 -608 -1.94 2,586 -1.56 0.2130
2019-08-13 2019-06-30 13F MERCK COM 58933Y105 31,326 -136 -0.43 2,627 0.38 0.2255
2019-05-14 2019-03-31 13F MERCK COM 58933Y105 31,462 -20,690 -39.67 2,617 -34.33 0.2316
2019-02-12 2018-12-31 13F MERCK COM 58933Y105 52,152 -7,184 -12.11 3,985 -5.32 0.3864
2018-11-13 2018-09-30 13F MERCK COM 58933Y105 59,336 -286 -0.48 4,209 16.75 0.3477
2018-10-10 2018-06-30 13F/A-1 MERCK COM 58933Y105 59,622 -95 -0.16 3,605 11.23 0.3098
2018-08-14 2018-06-30 13F MERCK COM 58933Y105 33,865 -25,852 2,056
2018-10-05 2018-03-31 13F/A-1 MERCK COM 58933Y105 59,717 -2,854 -4.56 3,241 -7.95 0.2932
2018-05-14 2018-03-31 13F MERCK COM 58933Y105 33,817 -28,754 1,842
2018-02-13 2017-12-31 13F MERCK COM 58933Y105 62,571 -106,617 -63.02 3,521 -67.50 0.3218
2017-11-14 2017-09-30 13F MERCK COM 58933Y105 169,188 -1,049 -0.62 10,833 -0.71 1.0427
2017-08-14 2017-06-30 13F MERCK COM 58933Y105 170,237 117,383 222.09 10,910 224.90 1.2044
2017-05-15 2017-03-31 13F MERCK COM 58933Y105 52,854 195 0.37 3,358 8.32 0.3332
2017-02-14 2016-12-31 13F MERCK COM 58933Y105 52,659 -8,291 -13.60 3,100 -18.51 0.3244
2016-11-14 2016-09-30 13F MERCK COM 58933Y105 60,950 -21,202 -25.81 3,804 -19.63 0.3836
2016-08-15 2016-06-30 13F MERCK COM 58933Y105 82,152 2,551 3.20 4,733 12.37 0.4589
2016-05-16 2016-03-31 13F MERCK & CO INC COM 58933Y105 79,601 -2,987 -3.62 4,212 -3.44 0.4219
2016-02-16 2015-12-31 13F MERCK & CO INC COM 58933Y105 82,588 -2,397 -2.82 4,362 3.93 0.4575
2015-11-16 2015-09-30 13F/A-1 MERCK & CO INC COM 58933Y105 84,985 -8,566 -9.16 4,197 -21.20 0.4325
2015-11-16 2015-09-30 13F MERCK & CO INC COM 58933Y105 84,985 4,197
2015-08-12 2015-06-30 13F MERCK & CO INC COM 58933Y105 93,551 -902 -0.95 5,326 -1.90 0.5016
2015-05-15 2015-03-31 13F MERCK & CO INC COM 58933Y105 94,453 94,453 0.00 5,429 0.5451
2015-01-28 2014-12-31 13F MERCK & CO INC COM 58933Y105 0 -106,376 -100.00 0 -100.00
2014-11-12 2014-09-30 13F MERCK & CO INC COM 58933Y105 106,376 -163 -0.15 6,306 2.32 0.6699
2014-07-31 2014-06-30 13F Merck COM 58933Y105 106,539 -22,817 -17.64 6,163 -16.07 0.6012
2014-05-19 2014-03-31 13F/A-1 Merck com 58933Y105 129,356 10,825 9.13 7,344 23.79 0.7694
2014-05-12 2014-03-31 13F Merck com 58933Y105 129,356 7,344
2014-02-14 2013-12-31 13F Merck com 58933Y105 118,531 -23,538 -16.57 5,932 -99.91 0.6399
2013-11-13 2013-09-30 13F Merck com 58933Y105 142,069 5,355 3.92 6,763,763 106,415.95 0.7744
2013-08-14 2013-06-30 13F Merck com 58933Y105 136,714 136,714 6,350 0.7907
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.