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

SecurityMRK / Merck & Co., Inc.
InstitutionTri-continental Corp
Latest Disclosed Ownership92,500 shares
Latest Disclosed Value $ 7,322,300
Tri-continental Corp reports 76.19% increase in ownership of MRK / Merck & Co., Inc.

On August 22, 2025 - Tri-continental Corp filed a NPORT-P form disclosing ownership of 92,500 shares of Merck & Co., Inc. (US:MRK) valued at $7,322,300 USD as of June 30, 2025. The entity filed a previous NPORT-P on May 27, 2025 disclosing 52,500 shares of Merck & Co., Inc.. This represents a change in shares of 76.19% during the quarter. The current value of the position is $10,609,750 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)
2025-08-22 2025-06-30 NP Merck EC US58933Y1055 92,500 40,000 76.19 7,322 55.39 0.3928
2025-05-27 2025-03-31 NP Merck EC US58933Y1055 52,500 -47,500 -47.50 4,712 -52.63 0.2636
2025-02-28 2024-12-31 NP Merck EC US58933Y1055 100,000 35,000 53.85 9,948 34.78 0.5337
2024-11-25 2024-09-30 NP Merck EC US58933Y1055 65,000 10,000 18.18 7,381 8.40 0.3851
2024-08-27 2024-06-30 NP Merck EC US58933Y1055 55,000 -20,000 -26.67 6,809 -31.19 0.3740
2024-05-28 2024-03-31 NP Merck EC US58933Y1055 75,000 -10,000 -11.76 9,896 6.80 0.5433
2024-02-26 2023-12-31 NP Merck EC US58933Y1055 85,000 2,500 3.03 9,267 9.10 0.5415
2023-11-27 2023-09-30 NP Merck EC US58933Y1055 82,500 2,500 3.12 8,493 -7.99 0.5292
2023-08-24 2023-06-30 NP Merck EC US58933Y1055 80,000 2,500 3.23 9,231 11.96 0.5552
2023-05-25 2023-03-31 NP Merck EC US58933Y1055 77,500 0 0.00 8,245 -4.11 0.5080
2023-02-24 2022-12-31 NP Merck EC US58933Y1055 77,500 -27,500 -26.19 8,599 -4.91 0.5451
2022-11-25 2022-09-30 NP Merck EC US58933Y1055 105,000 10,000 10.53 9,043 4.40 0.5965
2022-08-24 2022-06-30 NP Merck EC US58933Y1055 95,000 -30,000 -24.00 8,661 -15.55 0.5350
2022-05-25 2022-03-31 NP Merck EC US58933Y1055 125,000 -20,000 -13.79 10,256 -7.70 0.5351
2022-02-24 2021-12-31 NP Merck EC US58933Y1055 145,000 40,000 38.10 11,113 40.91 0.5540
2021-11-23 2021-09-30 NP Merck EC US58933Y1055 105,000 0 0.00 7,887 -3.42 0.4054
2021-08-25 2021-06-30 NP Merck EC US58933Y1055 105,000 27,100 34.79 8,166 35.97 0.4148
2021-05-25 2021-03-31 NP Merck EC US58933Y1055 77,900 -75,800 -49.32 6,005 -52.24 0.3202
2021-02-24 2020-12-31 NP Merck EC US58933Y1055 153,700 11,100 7.78 12,573 6.29 0.7203
2020-11-24 2020-09-30 NP Merck EC US58933Y1055 142,600 -117,000 -45.07 11,829 -41.08 0.7486
2020-08-26 2020-06-30 NP Merck EC US58933Y1055 259,600 -19,800 -7.09 20,075 -6.62 1.3301
2020-05-28 2020-03-31 NP Merck EC US58933Y1055 279,400 -1,900 -0.68 21,497 -15.97 1.6624
2020-02-25 2019-12-31 NP Merck EC 58933Y105 281,300 -6,100 -2.12 25,584 5.75 1.5366
2019-11-26 2019-09-30 NP Merck EC US58933Y1055 287,400 287,400 24,193 1.5252
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.