MERCK & CO. INC. · CUSIP 58933Y105 · CIK 936944
As of 2026-06-30, MARTINGALE ASSET MANAGEMENT L P reported 274.49K MRK (shares), valued at $35.27M, or 0.84% of its reported non-derivative portfolio. Filed 2026-08-13.
Verify history & sources →Shares decreased 6.93%; reported value decreased 0.58%, and weight changed -0.05 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 | 0.84% | 274,491 | SEC filing ↗Filed Aug 13, 2026 |
| Q1 2026 | 0.89% | 294,925 | SEC filing ↗Filed May 13, 2026 |
| Q4 2025 | 0.87% | 323,799 | SEC filing ↗Filed Feb 13, 2026 |
| Q3 2025 | 0.76% | 359,827 | SEC filing ↗Filed Nov 13, 2025 |
| Q2 2025 | 0.76% | 389,127 | SEC filing ↗Filed Aug 11, 2025 |
| Q1 2025 | 0.75% | 326,878 | SEC filing ↗Filed May 14, 2025 |
| Q4 2024 | 0.82% | 340,509 | SEC filing ↗Filed Feb 13, 2025 |
| Q3 2024 | 0.92% | 352,047 | SEC filing ↗Filed Nov 14, 2024 |
| Q2 2024 | 1.12% | 417,300 | SEC filing ↗Filed Aug 12, 2024 |
| Q1 2024 | 1.21% | 458,256 | SEC filing ↗Filed May 14, 2024 |
| Q4 2023 | 1.12% | 503,877 | SEC filing ↗Filed Feb 12, 2024 |
| Q3 2023 | 1.14% | 524,037 | SEC filing ↗Filed Nov 14, 2023 |
History & evidence by quarter
| Quarter | Weight | Quantity | Value | Change explained | Source |
|---|---|---|---|---|---|
| Q3 2023 | 1.14% | 524,037 | $53.95M | The prior quarter is outside the free window. Sign in for the comparison. | SEC filing ↗ Filed Nov 14, 2023 |
| Q4 2023 | 1.12% | 503,877 | $54.93M | Shares decreased 3.85%; reported value increased 1.82%, and weight changed -0.02 pp. Weight depends on both the security valuation and total portfolio value, not trade proceeds. | SEC filing ↗ Filed Feb 12, 2024 |
| Q1 2024 | 1.21% | 458,256 | $60.47M | Shares decreased 9.05%; reported value increased 10.07%, and weight changed +0.09 pp. Weight depends on both the security valuation and total portfolio value, not trade proceeds. | SEC filing ↗ Filed May 14, 2024 |
| Q2 2024 | 1.12% | 417,300 | $51.66M | Shares decreased 8.94%; reported value decreased 14.56%, and weight changed -0.09 pp. Weight depends on both the security valuation and total portfolio value, not trade proceeds. | SEC filing ↗ Filed Aug 12, 2024 |
| Q3 2024 | 0.92% | 352,047 | $39.98M | Shares decreased 15.64%; reported value decreased 22.61%, and weight changed -0.20 pp. Weight depends on both the security valuation and total portfolio value, not trade proceeds. | SEC filing ↗ Filed Nov 14, 2024 |
| Q4 2024 | 0.82% | 340,509 | $33.87M | Shares decreased 3.28%; reported value decreased 15.27%, and weight changed -0.10 pp. Weight depends on both the security valuation and total portfolio value, not trade proceeds. | SEC filing ↗ Filed Feb 13, 2025 |
| Q1 2025 | 0.75% | 326,878 | $29.34M | Shares decreased 4.00%; reported value decreased 13.38%, and weight changed -0.07 pp. Weight depends on both the security valuation and total portfolio value, not trade proceeds. | SEC filing ↗ Filed May 14, 2025 |
| Q2 2025 | 0.76% | 389,127 | $30.80M | Shares increased 19.04%; reported value increased 4.99%, and weight changed +0.01 pp. Weight depends on both the security valuation and total portfolio value, not trade proceeds. | SEC filing ↗ Filed Aug 11, 2025 |
| Q3 2025 | 0.76% | 359,827 | $30.20M | Shares decreased 7.53%; reported value decreased 1.96%, and weight changed +0.00 pp. Weight depends on both the security valuation and total portfolio value, not trade proceeds. | SEC filing ↗ Filed Nov 13, 2025 |
| Q4 2025 | 0.87% | 323,799 | $34.08M | Shares decreased 10.01%; reported value increased 12.86%, and weight changed +0.11 pp. Weight depends on both the security valuation and total portfolio value, not trade proceeds. | SEC filing ↗ Filed Feb 13, 2026 |
| Q1 2026 | 0.89% | 294,925 | $35.48M | Shares decreased 8.92%; reported value increased 4.09%, and weight changed +0.02 pp. Weight depends on both the security valuation and total portfolio value, not trade proceeds. | SEC filing ↗ Filed May 13, 2026 |
| Q2 2026 | 0.84% | 274,491 | $35.27M | Shares decreased 6.93%; reported value decreased 0.58%, and weight changed -0.05 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.