Merck & Co., Inc.
MX ˙ BMV ˙ US58933Y1055
SecurityMX:MRK / Merck & Co., Inc.
InstitutionBourne Lent Asset Management Inc
Latest Disclosed Ownership4,357 shares
Latest Disclosed Value $ 524,104
Bourne Lent Asset Management Inc reports 6.44% decrease in ownership of MRK / Merck & Co., Inc.

On April 17, 2026 - Bourne Lent Asset Management Inc filed a 13F-HR form disclosing ownership of 4,357 shares of Merck & Co., Inc. (MX:MRK) valued at $524,104 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 14, 2026 disclosing 4,657 shares of Merck & Co., Inc.. This represents a change in shares of -6.44% 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.

Upgrade to unlock premium data and export to Excel .

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)
2026-04-17 2026-03-31 13F MERCK COM 58933Y105 4,357 -300 -6.44 524 6.94 0.1927
2026-01-14 2025-12-31 13F MERCK COM 58933Y105 4,657 0 0.00 490 25.64 0.1626
2025-12-15 2025-09-30 13F MERCK COM 58933Y105 4,657 -80 -1.69 391 4.28 0.1389
2025-07-08 2025-06-30 13F MERCK COM 58933Y105 4,737 0 0.00 375 -12.00 0.1451
2025-04-14 2025-03-31 13F MERCK COM 58933Y105 4,737 0 0.00 425 -9.77 0.1824
2025-01-17 2024-12-31 13F MERCK COM 58933Y105 4,737 -730 -13.35 471 -24.03 0.1796
2024-10-15 2024-09-30 13F MERCK COM 58933Y105 5,467 0 0.00 621 -8.28 0.2356
2024-08-01 2024-06-30 13F MERCK COM 58933Y105 5,467 0 0.00 677 -6.24 0.2595
2024-04-12 2024-03-31 13F MERCK COM 58933Y105 5,467 0 0.00 721 20.97 0.2909
2024-01-19 2023-12-31 13F MERCK COM 58933Y105 5,467 -200 -3.53 596 2.23 0.2419
2023-10-19 2023-09-30 13F MERCK COM 58933Y105 5,667 -300 -5.03 583 -15.26 0.2570
2023-07-18 2023-06-30 13F MERCK COM 58933Y105 5,967 0 0.00 689 8.52 0.2401
2023-04-25 2023-03-31 13F MERCK COM 58933Y105 5,967 0 0.00 635 -4.23 0.2400
2023-01-24 2022-12-31 13F MERCK COM 58933Y105 5,967 0 0.00 662 28.79 0.2838
2022-11-01 2022-09-30 13F MERCK COM 58933Y105 5,967 0 0.00 514 -5.51 0.2235
2022-07-27 2022-06-30 13F MERCK COM 58933Y105 5,967 0 0.00 544 11.02 0.2159
2022-04-26 2022-03-31 13F MERCK COM 58933Y105 5,967 0 0.00 490 7.22 0.1534
2022-01-20 2021-12-31 13F MERCK COM 58933Y105 5,967 0 0.00 457 2.01 0.1223
2021-10-20 2021-09-30 13F MERCK COM 58933Y105 5,967 0 0.00 448 -3.45 0.1286
2021-07-28 2021-06-30 13F MERCK COM 58933Y105 5,967 0 0.00 464 0.87 0.1303
2021-04-23 2021-03-31 13F MERCK & CO. COM 58933Y105 5,967 0 0.00 460 -5.74 0.1468
2021-01-27 2020-12-31 13F MERCK & CO. COM 58933Y105 5,967 -700 -10.50 488 -11.75 0.1607
2020-10-19 2020-09-30 13F MERCK & CO. COM 58933Y105 6,667 0 0.00 553 7.17 0.2123
2020-07-20 2020-06-30 13F MERCK & CO. COM 58933Y105 6,667 0 0.00 516 0.58 0.2228
2020-04-17 2020-03-31 13F MERCK & CO. COM 58933Y105 6,667 0 0.00 513 -15.35 0.2753
2020-01-24 2019-12-31 13F MERCK COM 58933Y105 6,667 0 0.00 606 8.02 0.2854
2019-10-24 2019-09-30 13F MERCK COM 58933Y105 6,667 0 0.00 561 0.36 0.2691
2019-07-29 2019-06-30 13F MERCK COM 58933Y105 6,667 0 0.00 559 0.90 0.2680
2019-04-22 2019-03-31 13F MERCK COM 58933Y105 6,667 0 0.00 554 8.84 0.2745
2019-01-25 2018-12-31 13F MERCK COM 58933Y105 6,667 0 0.00 509 7.61 0.3013
2018-10-19 2018-09-30 13F MERCK COM 58933Y105 6,667 0 0.00 473 16.79 0.2255
2018-07-25 2018-06-30 13F MERCK COM 58933Y105 6,667 80 1.21 405 12.81 0.2135
2018-04-20 2018-03-31 13F MERCK COM 58933Y105 6,587 -300 -4.36 359 -7.47 0.1950
2018-02-05 2017-12-31 13F MERCK COM 58933Y105 6,887 0 0.00 388 -12.02 0.2094
2017-10-16 2017-09-30 13F MERCK COM 58933Y105 6,887 0 0.00 441 0.00 0.2265
2017-07-20 2017-06-30 13F MERCK COM 58933Y105 6,887 -400 -5.49 441 -4.75 0.2409
2017-04-27 2017-03-31 13F MERCK COM 58933Y105 7,287 0 0.00 463 7.93 0.2529
2017-01-27 2016-12-31 13F MERCK COM 58933Y105 7,287 800 12.33 429 5.93 0.2561
2016-10-25 2016-09-30 13F MERCK COM 58933Y105 6,487 0 0.00 405 8.29 0.2984
2016-07-26 2016-06-30 13F MERCK COM 58933Y105 6,487 0 0.00 374 9.04 0.2939
2016-05-02 2016-03-31 13F MERCK & CO INC COM 58933Y105 6,487 0 0.00 343 0.00 0.2743
2016-01-26 2015-12-31 13F MERCK & CO INC COM 58933Y105 6,487 0 0.00 343 7.19 0.2595
2015-10-27 2015-09-30 13F MERCK & CO INC COM 58933Y105 6,487 0 0.00 320 -13.28 0.2627
2015-07-28 2015-06-30 13F MERCK & CO INC COM 58933Y105 6,487 0 0.00 369 -1.07 0.2903
2015-05-14 2015-03-31 13F MERCK & CO INC COM 58933Y105 6,487 6,487 373 0.2824
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.