| Filer | Ownership | Change % | Holdings Value | Net Change | Nb Shares | Change % | Reporting Name | Report Period |
|---|---|---|---|---|---|---|---|---|
| VANGUARD GROUP INC | 10% | $21,453,454,600 | 253,257,639 | The Vanguard Group | 28 Feb 2025 |
As of 31 Dec 2025, 3,527 institutional investors reported holding 1,945,185,339 shares of Merck & Co., Inc. - Common Stock (MRK). This represents 77% of the company’s total 2,527,521,347 outstanding shares.
The largest institutional shareholders of Merck & Co., Inc. - Common Stock (MRK) together control 49% of the company’s outstanding shares — a level of ownership often associated with strong institutional conviction and long‑term capital commitment.
| Institution | Ownership % | Shares Held | Share Change % | Portfolio % | Holdings Value |
|---|---|---|---|---|---|
| VANGUARD GROUP INC | 10% | 254,322,763 | +0.87% | 0.39% | $26,770,014,033 |
| BlackRock, Inc. | 8.7% | 219,095,465 | +2% | 0.39% | $23,061,988,586 |
| STATE STREET CORP | 4.7% | 120,040,168 | +1.6% | 0.43% | $12,737,503,943 |
| WELLINGTON MANAGEMENT GROUP LLP | 3.4% | 86,435,458 | +15% | 1.6% | $9,098,196,310 |
| GEODE CAPITAL MANAGEMENT, LLC | 2.4% | 60,047,984 | +0.42% | 0.39% | $6,307,571,859 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 1.9% | 48,563,804 | -9.6% | 0.79% | $5,111,826,930 |
| MORGAN STANLEY | 1.8% | 44,946,021 | +0.81% | 0.28% | $4,731,018,465 |
| FMR LLC | 1.6% | 40,836,566 | +22% | 0.22% | $4,298,456,848 |
| NORGES BANK | 1.5% | 37,981,502 | 0.43% | $3,997,932,901 | |
| JPMORGAN CHASE & CO | 1.2% | 29,199,978 | -17% | 0.21% | $3,073,589,831 |
| BANK OF AMERICA CORP /DE/ | 1.1% | 27,854,441 | +5.3% | 0.21% | $2,931,958,400 |
| NORTHERN TRUST CORP | 1.1% | 27,234,642 | -2.5% | 0.37% | $2,866,718,416 |
| Fisher Asset Management, LLC | 0.98% | 24,873,327 | +3.3% | 0.89% | $2,618,166,478 |
| Invesco Ltd. | 0.81% | 20,546,185 | +3.5% | 0.33% | $2,162,691,447 |
| Legal & General Group Plc | 0.78% | 19,776,842 | -4.3% | 0.46% | $2,081,710,387 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 0.77% | 19,433,403 | -1.6% | 0.43% | $2,045,560,000 |
| GOLDMAN SACHS GROUP INC | 0.77% | 19,344,676 | +29% | 0.29% | $2,036,220,530 |
| UBS Group AG | 0.76% | 19,178,272 | +13% | 0.4% | $2,018,704,911 |
| Bank of New York Mellon Corp | 0.76% | 19,164,526 | -12% | 0.36% | $2,017,257,973 |
| PRICE T ROWE ASSOCIATES INC /MD/ | 0.74% | 18,753,390 | +38% | 0.21% | $1,973,983,000 |
| FRANKLIN RESOURCES INC | 0.64% | 16,064,050 | -4.1% | 0.42% | $1,690,901,822 |
| AMERIPRISE FINANCIAL INC | 0.63% | 15,974,409 | +0.25% | 0.38% | $1,683,102,538 |
| HARRIS ASSOCIATES L P | 0.56% | 14,088,705 | +43% | 1.9% | $1,482,977,135 |
| STATE FARM MUTUAL AUTOMOBILE INSURANCE CO | 0.55% | 13,794,969 | 0% | 1.1% | $1,452,058,437 |
| Amundi | 0.53% | 13,385,093 | -12% | 0.43% | $1,408,915,521 |
| Period | Reported Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2025 Q4 | 1,945,185,339 | $204,936,363,433 | +$5,882,297,845 | $105.26 | 3,527 |
| 2025 Q3 | 1,898,845,568 | $159,333,539,344 | -$5,252,069,947 | $83.93 | 3,273 |
| 2025 Q2 | 1,962,034,663 | $155,426,643,563 | +$1,505,473,737 | $79.16 | 3,289 |
| 2025 Q1 | 1,941,447,306 | $174,232,015,862 | -$3,587,246,902 | $89.76 | 3,404 |
| 2024 Q4 | 1,974,065,350 | $196,447,436,509 | +$1,380,482,223 | $99.48 | 3,564 |
| 2024 Q3 | 1,947,661,118 | $221,070,370,247 | -$744,228,437 | $113.56 | 3,451 |
| 2024 Q2 | 1,949,415,662 | $241,598,779,368 | +$1,501,198,298 | $123.80 | 3,508 |
| 2024 Q1 | 1,941,852,214 | $256,040,362,493 | +$1,890,608,443 | $131.95 | 3,501 |
| 2023 Q4 | 1,933,150,988 | $210,948,238,812 | +$1,318,800,501 | $109.02 | 3,400 |
| 2023 Q3 | 1,915,111,810 | $197,316,747,504 | -$1,438,036,059 | $102.95 | 3,187 |
| 2023 Q2 | 1,928,213,181 | $222,354,738,610 | +$571,381,359 | $115.39 | 3,228 |
| 2023 Q1 | 1,916,184,102 | $203,955,773,239 | +$1,393,536,493 | $106.39 | 3,143 |
| 2022 Q4 | 1,910,613,534 | $212,044,007,861 | +$3,048,706,791 | $110.95 | 3,194 |
| 2022 Q3 | 1,884,427,186 | $162,534,818,377 | +$724,062,490 | $86.12 | 2,957 |
| 2022 Q2 | 1,873,403,998 | $170,943,528,865 | +$4,592,156,668 | $91.17 | 2,980 |
| 2022 Q1 | 1,838,887,453 | $150,955,940,625 | +$142,448,476 | $82.05 | 2,924 |
| 2021 Q4 | 1,837,012,964 | $140,853,569,294 | +$138,185,632 | $76.64 | 2,872 |
| 2021 Q3 | 1,837,457,296 | $138,201,713,292 | -$807,929,658 | $75.11 | 2,619 |
| 2021 Q2 | 1,848,198,293 | $143,695,016,489 | -$241,935,815 | $77.77 | 2,641 |
| 2021 Q1 | 1,850,105,541 | $142,628,769,907 | -$1,117,656,172 | $77.09 | 2,654 |
| 2020 Q4 | 1,866,883,590 | $152,693,500,286 | -$706,920,307 | $81.80 | 2,670 |
| 2020 Q3 | 1,875,444,213 | $155,469,945,637 | -$969,657,574 | $82.95 | 2,532 |
| 2020 Q2 | 1,884,914,191 | $145,782,442,284 | -$606,647,857 | $77.33 | 2,468 |
| 2020 Q1 | 1,894,692,919 | $145,892,266,360 | -$1,876,783,315 | $76.94 | 2,447 |
| 2019 Q4 | 1,915,462,338 | $174,212,083,452 | +$121,693,650 | $90.95 | 2,502 |
| 2019 Q3 | 1,917,596,821 | $161,399,214,755 | -$1,259,011,708 | $84.18 | 2,277 |
| 2019 Q2 | 1,931,032,590 | $161,888,528,365 | +$572,969,976 | $83.85 | 2,264 |
| 2019 Q1 | 1,956,908,100 | $162,681,987,049 | -$1,344,776,430 | $83.17 | 2,250 |
| 2018 Q4 | 1,975,345,373 | $150,902,555,637 | -$880,884,221 | $76.41 | 2,213 |
| 2018 Q3 | 1,984,848,823 | $140,793,973,040 | +$3,600,893,701 | $70.94 | 2,020 |
| 2018 Q2 | 1,937,128,452 | $117,568,988,263 | -$3,746,313,470 | $60.70 | 1,985 |
| 2018 Q1 | 1,998,884,778 | $108,890,984,548 | -$933,753,705 | $54.47 | 1,958 |
| 2017 Q4 | 2,015,428,164 | $113,422,330,685 | -$1,112,535,759 | $56.27 | 1,972 |
| 2017 Q3 | 2,033,976,922 | $130,222,273,759 | +$1,157,828,229 | $64.03 | 1,889 |
| 2017 Q2 | 2,030,118,598 | $130,171,207,324 | -$1,136,384,953 | $64.09 | 1,887 |
| 2017 Q1 | 2,038,974,197 | $129,565,256,270 | +$11,571,640,991 | $63.54 | 1,899 |
| 2016 Q4 | 2,045,339,344 | $120,452,613,795 | -$1,972,272,504 | $58.87 | 1,875 |
| 2016 Q3 | 2,058,604,827 | $128,385,194,131 | +$1,131,297,055 | $62.41 | 1,770 |
| 2016 Q2 | 2,042,837,477 | $117,705,440,972 | +$79,685,259 | $57.61 | 1,714 |
| 2016 Q1 | 2,040,836,066 | $107,991,318,537 | -$674,079,835 | $52.91 | 1,692 |
| 2015 Q4 | 2,052,429,890 | $108,400,002,466 | -$2,110,617,718 | $52.82 | 1,710 |
| 2015 Q3 | 2,088,340,834 | $103,146,145,399 | -$234,126,115 | $49.39 | 1,620 |
| 2015 Q2 | 2,102,152,968 | $119,681,346,928 | -$230,574,203 | $56.93 | 1,679 |
| 2015 Q1 | 2,103,056,614 | $120,942,537,699 | -$459,335,909 | $57.48 | 1,663 |
| 2014 Q4 | 2,113,752,741 | $120,112,553,976 | -$272,528,664 | $56.79 | 1,668 |
| 2014 Q3 | 2,110,510,324 | $125,108,077,886 | -$1,876,466,888 | $59.28 | 1,570 |
| 2014 Q2 | 2,144,477,035 | $124,045,106,143 | -$1,578,377,097 | $57.85 | 1,568 |
| 2014 Q1 | 2,176,480,448 | $123,551,292,845 | +$4,002,536,525 | $56.77 | 1,549 |