Merck & Co., Inc.
MX ˙ BMV ˙ US58933Y1055
SecurityMX:MRK / Merck & Co., Inc.
InstitutionE&G Advisors, LP
Latest Disclosed Ownership14,335 shares
Latest Disclosed Value $ 1,723,762
E&G Advisors, LP reports 0.21% increase in ownership of MRK / Merck & Co., Inc.

On April 21, 2026 - E&G Advisors, LP filed a 13F-HR form disclosing ownership of 14,335 shares of Merck & Co., Inc. (MX:MRK) valued at $1,723,762 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 23, 2026 disclosing 14,305 shares of Merck & Co., Inc.. This represents a change in shares of 0.21% 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)
2026-04-21 2026-03-31 13F MERCK COM 58933Y105 14,335 30 0.21 1,724 14.41 0.3837
2026-01-23 2025-12-31 13F MERCK COM 58933Y105 14,305 0 0.00 1,506 25.29 0.3368
2025-10-21 2025-09-30 13F MERCK COM 58933Y105 14,305 -92 -0.64 1,202 5.35 0.2798
2025-07-14 2025-06-30 13F MERCK COM 58933Y105 14,397 -201 -1.38 1,141 -12.97 0.2959
2025-04-23 2025-03-31 13F MERCK COM 58933Y105 14,598 -100 -0.68 1,311 -10.33 0.3701
2025-01-24 2024-12-31 13F MERCK COM 58933Y105 14,698 0 0.00 1,463 -12.35 0.3970
2024-10-18 2024-09-30 13F MERCK COM 58933Y105 14,698 100 0.69 1,669 -7.64 0.4619
2024-07-18 2024-06-30 13F MERCK COM 58933Y105 14,598 80 0.55 1,806 -5.64 0.5312
2024-04-19 2024-03-31 13F MERCK COM 58933Y105 14,518 45 0.31 1,914 21.37 0.6008
2024-01-25 2023-12-31 13F MERCK COM 58933Y105 14,473 -900 -5.85 1,578 -0.38 0.5592
2023-10-25 2023-09-30 13F MERCK COM 58933Y105 15,373 0 0.00 1,583 -10.72 0.5788
2023-07-21 2023-06-30 13F MERCK COM 58933Y105 15,373 -200 -1.28 1,774 7.07 0.6204
2023-07-20 2023-03-31 13F/A-1 MERCK COM 58933Y105 15,573 157 1.02 1,657 -3.16 0.6139
2023-04-17 2023-03-31 13F MERCK COM 58933Y105 15,078 -338 1,604 0.5844
2023-01-13 2022-12-31 13F MERCK COM 58933Y105 15,416 -760 -4.70 1,710 22.76 0.6429
2022-10-11 2022-09-30 13F MERCK COM 58933Y105 16,176 -202 -1.23 1,393 -6.70 0.5139
2022-07-06 2022-06-30 13F MERCK COM 58933Y105 16,378 110 0.68 1,493 11.84 0.5051
2022-04-12 2022-03-31 13F MERCK COM 58933Y105 16,268 0 0.00 1,335 7.06 0.3646
2022-01-13 2021-12-31 13F MERCK COM 58933Y105 16,268 -91 -0.56 1,247 1.46 0.3110
2021-10-20 2021-09-30 13F MERCK COM 58933Y105 16,359 16,359 1,229 -3.38 0.3332
2021-07-12 2021-06-30 13F MERCK COM 58933Y105 0 -16,359 -100.00 1,272 0.87 0.3452
2021-04-12 2021-03-31 13F MERCK & CO. COM 58933Y105 16,359 359 2.24 1,261 -3.67 0.3695
2021-01-26 2020-12-31 13F MERCK & CO. COM 58933Y105 16,000 0 0.00 1,309 -1.36 0.4046
2020-10-13 2020-09-30 13F MERCK & CO. COM 58933Y105 16,000 59 0.37 1,327 7.62 0.4572
2020-07-07 2020-06-30 13F MERCK & CO. COM 58933Y105 15,941 -489 -2.98 1,233 -2.45 0.4765
2020-04-08 2020-03-31 13F MERCK & CO. COM 58933Y105 16,430 -400 -2.38 1,264 -17.44 0.6240
2020-01-10 2019-12-31 13F MERCK COM 58933Y105 16,830 -11 -0.07 1,531 7.97 0.5687
2019-10-10 2019-09-30 13F MERCK COM 58933Y105 16,841 702 4.35 1,418 4.80 0.5683
2019-07-12 2019-06-30 13F MERCK COM 58933Y105 16,139 -597 -3.57 1,353 -2.80 0.5773
2019-04-18 2019-03-31 13F MERCK COM 58933Y105 16,736 -97 -0.58 1,392 8.24 0.6118
2019-01-17 2018-12-31 13F MERCK COM 58933Y105 16,833 1,203 7.70 1,286 15.96 0.5815
2018-10-09 2018-09-30 13F MERCK COM 58933Y105 15,630 953 6.49 1,109 24.47 0.4214
2018-07-27 2018-06-30 13F MERCK COM 58933Y105 14,677 1,604 12.27 891 25.14 0.3724
2018-04-18 2018-03-31 13F MERCK COM 58933Y105 13,073 -347 -2.59 712 -5.70 0.3063
2018-01-16 2017-12-31 13F MERCK COM 58933Y105 13,420 400 3.07 755 -9.47 0.3182
2017-10-20 2017-09-30 13F MERCK COM 58933Y105 13,020 2,200 20.33 834 20.35 0.3766
2017-07-24 2017-06-30 13F MERCK COM 58933Y105 10,820 0 0.00 693 0.73 0.3333
2017-04-11 2017-03-31 13F MERCK COM 58933Y105 10,820 -1,399 -11.45 688 -4.31 0.3532
2017-01-19 2016-12-31 13F MERCK COM 58933Y105 12,219 -1,495 -10.90 719 -16.00 0.4259
2016-10-11 2016-09-30 13F MERCK COM 58933Y105 13,714 -11,146 -44.84 856 -40.22 0.5026
2016-07-25 2016-06-30 13F MERCK COM 58933Y105 24,860 -2,695 -9.78 1,432 -1.78 0.8689
2016-04-12 2016-03-31 13F MERCK & CO INC COM 58933Y105 27,555 -1,595 -5.47 1,458 -5.32 0.9508
2016-01-26 2015-12-31 13F MERCK & CO INC COM 58933Y105 29,150 -6,595 -18.45 1,540 -12.75 0.9234
2015-10-09 2015-09-30 13F MERCK & CO INC COM 58933Y105 35,745 1,555 4.55 1,765 -9.30 1.1225
2015-07-21 2015-06-30 13F MERCK & CO INC COM 58933Y105 34,190 -2,236 -6.14 1,946 -7.07 1.1374
2015-04-30 2015-03-31 13F MERCK & CO INC COM 58933Y105 36,426 -9,146 -20.07 2,094 -19.09 1.2356
2015-01-26 2014-12-31 13F MERCK & CO INC COM 58933Y105 45,572 -5,305 -10.43 2,588 -14.19 1.6803
2014-10-22 2014-09-30 13F MERCK & CO INC COM 58933Y105 50,877 4 0.01 3,016 2.48 1.9379
2014-07-30 2014-06-30 13F MERCK & CO INC COM 58933Y105 50,873 3,304 6.95 2,943 9.00 1.9017
2014-05-08 2014-03-31 13F MERCK & CO INC COM 58933Y105 47,569 4,504 10.46 2,700 25.29 2.1285
2014-02-04 2013-12-31 13F MERCK & CO INC COM 58933Y105 43,065 43,065 2,155 2.0188
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.