Merck & Co., Inc.
BG ˙ BUL ˙ US58933Y1055
SecurityBG:6MK / Merck & Co., Inc.
InstitutionCornerstone Capital, Inc.
Latest Disclosed Ownership4,623 shares
Latest Disclosed Value $ 556,101
Cornerstone Capital, Inc. reports 1.45% increase in ownership of 6MK / Merck & Co., Inc.

On May 12, 2026 - Cornerstone Capital, Inc. filed a 13F-HR form disclosing ownership of 4,623 shares of Merck & Co., Inc. (BG:6MK) valued at $556,101 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 4,557 shares of Merck & Co., Inc.. This represents a change in shares of 1.45% 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)
2026-05-12 2026-03-31 13F MERCK COM 58933Y105 4,623 66 1.45 556 16.08 0.0555
2026-02-12 2025-12-31 13F MERCK COM 58933Y105 4,557 459 11.20 480 39.65 0.0473
2025-11-10 2025-09-30 13F MERCK COM 58933Y105 4,098 -1,400 -25.46 344 -21.15 0.0337
2025-08-12 2025-06-30 13F MERCK COM 58933Y105 5,498 0 0.00 435 -11.76 0.0455
2025-05-13 2025-03-31 13F MERCK COM 58933Y105 5,498 0 0.00 494 -9.71 0.0531
2025-02-13 2024-12-31 13F MERCK COM 58933Y105 5,498 -70 -1.26 547 -13.61 0.0576
2024-10-30 2024-09-30 13F MERCK COM 58933Y105 5,568 -175 -3.05 632 -10.99 0.0590
2024-08-02 2024-06-30 13F MERCK COM 58933Y105 5,743 1,170 25.58 711 17.74 0.0717
2024-05-01 2024-03-31 13F MERCK COM 58933Y105 4,573 -670 -12.78 603 5.60 0.0619
2024-02-02 2023-12-31 13F MERCK COM 58933Y105 5,243 0 0.00 572 5.94 0.0626
2023-11-13 2023-09-30 13F MERCK COM 58933Y105 5,243 -270 -4.90 540 -15.25 0.0650
2023-08-21 2023-06-30 13F MERCK COM 58933Y105 5,513 0 0.00 636 8.53 0.0736
2023-05-15 2023-03-31 13F MERCK COM 58933Y105 5,513 -604 -9.87 587 -13.57 0.0708
2023-02-13 2022-12-31 13F MERCK COM 58933Y105 6,117 -1,061 -14.78 679 9.71 0.0869
2022-10-27 2022-09-30 13F MERCK COM 58933Y105 7,178 339 4.96 618 -0.96 0.0868
2022-08-15 2022-06-30 13F MERCK COM 58933Y105 6,839 0 0.00 624 11.23 0.0800
2022-05-13 2022-03-31 13F MERCK COM 58933Y105 6,839 -165 -2.36 561 4.47 0.0629
2022-02-11 2021-12-31 13F MERCK COM 58933Y105 7,004 -899 -11.38 537 -9.60 0.0572
2021-11-09 2021-09-30 13F MERCK COM 58933Y105 7,903 -151 -1.87 594 -5.11 0.0685
2021-08-13 2021-06-30 13F MERCK COM 58933Y105 8,054 151 1.91 626 2.79 0.0710
2021-05-17 2021-03-31 13F MERCK & CO. COM 58933Y105 7,903 -1,053 -11.76 609 -16.92 0.0737
2021-02-12 2020-12-31 13F MERCK & CO. COM 58933Y105 8,956 1,360 17.90 733 16.35 0.0943
2020-10-27 2020-09-30 13F MERCK & CO. COM 58933Y105 7,596 1,500 24.61 630 33.76 0.0908
2020-08-14 2020-06-30 13F MERCK & CO. COM 58933Y105 6,096 315 5.45 471 5.84 0.0803
2020-05-15 2020-03-31 13F MERCK & CO. COM 58933Y105 5,781 -265 -4.38 445 -19.09 0.0925
2020-02-10 2019-12-31 13F MERCK COM 58933Y105 6,046 -595 -8.96 550 -1.61 0.0776
2019-11-13 2019-09-30 13F MERCK COM 58933Y105 6,641 -200 -2.92 559 -2.61 0.0870
2019-08-14 2019-06-30 13F MERCK COM 58933Y105 6,841 0 0.00 574 0.88 0.0900
2019-05-15 2019-03-31 13F MERCK COM 58933Y105 6,841 -900 -11.63 569 -3.72 0.0941
2019-02-11 2018-12-31 13F MERCK COM 58933Y105 7,741 -175 -2.21 591 5.16 0.1054
2018-11-13 2018-09-30 13F MERCK COM 58933Y105 7,916 0 0.00 562 16.84 0.0854
2018-08-13 2018-06-30 13F MERCK COM 58933Y105 7,916 25 0.32 481 11.86 0.0817
2018-05-08 2018-03-31 13F MERCK COM 58933Y105 7,891 -55 -0.69 430 -3.80 0.0708
2018-02-12 2017-12-31 13F MERCK COM 58933Y105 7,946 0 0.00 447 -12.18 0.0759
2017-11-13 2017-09-30 13F MERCK COM 58933Y105 7,946 -1,711 -17.72 509 -17.77 0.0891
2017-08-03 2017-06-30 13F MERCK COM 58933Y105 9,657 -600 -5.85 619 -5.06 0.1178
2017-05-12 2017-03-31 13F MERCK COM 58933Y105 10,257 55 0.54 652 8.49 0.1275
2017-02-13 2016-12-31 13F MERCK COM 58933Y105 10,202 0 0.00 601 -5.65 0.1285
2016-11-08 2016-09-30 13F MERCK COM 58933Y105 10,202 0 0.00 637 8.33 0.1376
2016-08-10 2016-06-30 13F MERCK COM 58933Y105 10,202 800 8.51 588 18.31 0.1282
2016-05-12 2016-03-31 13F MERCK & CO INC COM 58933Y105 9,402 0 0.00 497 0.00 0.1096
2016-02-16 2015-12-31 13F MERCK & CO INC COM 58933Y105 9,402 -4,155 -30.65 497 -25.82 0.1123
2015-11-16 2015-09-30 13F MERCK & CO INC COM 58933Y105 13,557 -2,040 -13.08 670 -24.55 0.1670
2015-08-14 2015-06-30 13F MERCK & CO INC COM 58933Y105 15,597 11,090 246.06 888 242.86 0.2046
2015-05-15 2015-03-31 13F MERCK & CO INC COM 58933Y105 4,507 -125 -2.70 259 -1.52 0.0675
2015-02-17 2014-12-31 13F MERCK & CO INC COM 58933Y105 4,632 0 0.00 263 -4.36 0.0695
2014-11-14 2014-09-30 13F MERCK & CO INC COM 58933Y105 4,632 0 0.00 275 2.61 0.0762
2014-08-14 2014-06-30 13F MERCK & CO INC COM 58933Y105 4,632 0 0.00 268 1.90 0.0722
2014-05-15 2014-03-31 13F MERCK & CO INC COM 58933Y105 4,632 -1,000 -17.76 263 -6.74 0.0754
2014-02-11 2013-12-31 13F MERCK & CO INC COM 58933Y105 5,632 0 0.00 282 5.22 0.0827
2013-11-14 2013-09-30 13F MERCK & CO INC COM 58933Y105 5,632 -749 -11.74 268 -9.46 0.0817
2013-08-14 2013-06-30 13F MERCK & CO INC COM 58933Y105 6,381 6,381 296 0.0971
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.