MERCK & CO. INC. · CUSIP 58933Y105 · CIK 1164508
As of 2026-06-30, ARROWSTREET CAPITAL, LIMITED PARTNERSHIP reported 3.97M MRK (shares), valued at $509.70M, or 0.23% of its reported non-derivative portfolio. Filed 2026-08-13.
Verify history & sources →Shares increased 35.08%; reported value increased 44.30%, and weight changed +0.04 pp. Weight depends on both the security valuation and total portfolio value, not trade proceeds.
Left: % · Right: Shares · Independently scaled axes
Exact data and methodology
Axes scale independently; a crossing does not mean equal values. Weight uses each quarter's total reported non-derivative value. Same CUSIP; missing quarters are gaps, not zero. Revised history may include later disclosures.
| Quarter | Weight | Quantity | Source |
|---|---|---|---|
| Q2 2026 | 0.23% | 3,966,523 | SEC filing ↗Filed Aug 13, 2026Combination report |
| Q1 2026 | 0.19% | 2,936,330 | SEC filing ↗Filed May 14, 2026Combination report |
| Q4 2025 | 0.61% | 9,944,123 | SEC filing ↗Filed Feb 13, 2026Combination report |
| Q3 2025 | 0.99% | 18,708,703 | SEC filing ↗Filed Nov 13, 2025Combination report |
| Q2 2025 | 1.09% | 19,456,096 | SEC filing ↗Filed Aug 13, 2025Combination report |
| Q1 2025 | 1.05% | 14,362,008 | SEC filing ↗Filed May 14, 2025Combination report |
| Q4 2024 | 0.52% | 6,473,094 | SEC filing ↗Filed Feb 12, 2025Combination report |
| Q3 2024 | 0.67% | 6,959,133 | SEC filing ↗Filed Nov 14, 2024Combination report |
| Q2 2024 | 0.68% | 6,207,199 | SEC filing ↗Filed Aug 14, 2024Combination report |
| Q1 2024 | 0.58% | 4,747,708 | SEC filing ↗Filed May 15, 2024Combination report |
| Q4 2023 | 0.64% | 5,578,297 | SEC filing ↗Filed Feb 14, 2024Combination report |
| Q3 2023 | 1.18% | 9,491,744 | SEC filing ↗Filed Nov 14, 2023Combination report |
History & evidence by quarter
| Quarter | Weight | Quantity | Value | Change explained | Source |
|---|---|---|---|---|---|
| Q3 2023 | 1.18% | 9,491,744 | $977.17M | The prior quarter is outside the free window. Sign in for the comparison. | SEC filing ↗ Filed Nov 14, 2023 |
| Q4 2023 | 0.64% | 5,578,297 | $608.15M | Shares decreased 41.23%; reported value decreased 37.76%, and weight changed -0.54 pp. Weight depends on both the security valuation and total portfolio value, not trade proceeds. | SEC filing ↗ Filed Feb 14, 2024 |
| Q1 2024 | 0.58% | 4,747,708 | $626.46M | Shares decreased 14.89%; reported value increased 3.01%, and weight changed -0.06 pp. Weight depends on both the security valuation and total portfolio value, not trade proceeds. | SEC filing ↗ Filed May 15, 2024 |
| Q2 2024 | 0.68% | 6,207,199 | $768.45M | Shares increased 30.74%; reported value increased 22.67%, and weight changed +0.10 pp. Weight depends on both the security valuation and total portfolio value, not trade proceeds. | SEC filing ↗ Filed Aug 14, 2024 |
| Q3 2024 | 0.67% | 6,959,133 | $790.28M | Shares increased 12.11%; reported value increased 2.84%, and weight changed -0.01 pp. Weight depends on both the security valuation and total portfolio value, not trade proceeds. | SEC filing ↗ Filed Nov 14, 2024 |
| Q4 2024 | 0.52% | 6,473,094 | $643.94M | Shares decreased 6.98%; reported value decreased 18.52%, and weight changed -0.15 pp. Weight depends on both the security valuation and total portfolio value, not trade proceeds. | SEC filing ↗ Filed Feb 12, 2025 |
| Q1 2025 | 1.05% | 14,362,008 | $1.29B | Shares increased 121.87%; reported value increased 100.19%, and weight changed +0.53 pp. Weight depends on both the security valuation and total portfolio value, not trade proceeds. | SEC filing ↗ Filed May 14, 2025 |
| Q2 2025 | 1.09% | 19,456,096 | $1.54B | Shares increased 35.47%; reported value increased 19.47%, and weight changed +0.04 pp. Weight depends on both the security valuation and total portfolio value, not trade proceeds. | SEC filing ↗ Filed Aug 13, 2025 |
| Q3 2025 | 0.99% | 18,708,703 | $1.57B | Shares decreased 3.84%; reported value increased 1.95%, and weight changed -0.10 pp. Weight depends on both the security valuation and total portfolio value, not trade proceeds. | SEC filing ↗ Filed Nov 13, 2025 |
| Q4 2025 | 0.61% | 9,944,123 | $1.05B | Shares decreased 46.85%; reported value decreased 33.34%, and weight changed -0.38 pp. Weight depends on both the security valuation and total portfolio value, not trade proceeds. | SEC filing ↗ Filed Feb 13, 2026 |
| Q1 2026 | 0.19% | 2,936,330 | $353.21M | Shares decreased 70.47%; reported value decreased 66.26%, and weight changed -0.42 pp. Weight depends on both the security valuation and total portfolio value, not trade proceeds. | SEC filing ↗ Filed May 14, 2026 |
| Q2 2026 | 0.23% | 3,966,523 | $509.70M | Shares increased 35.08%; reported value increased 44.30%, and weight changed +0.04 pp. Weight depends on both the security valuation and total portfolio value, not trade proceeds. | SEC filing ↗ Filed Aug 13, 2026 |
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Figures are as reported to the SEC and merged with later amendments where Akkru could match them. Preview limits apply to what is listed, not to the totals, which come from the complete reported data. Nothing is zero-filled: a missing quarter or month is shown as missing.