| Filer | Ownership | Change % | Holdings Value | Net Change | Nb Shares | Change % | Reporting Name | Report Period |
|---|---|---|---|---|---|---|---|---|
| VANGUARD GROUP INC | 10% | $20,744,333,210 | 253,257,639 | The Vanguard Group | 28 Feb 2025 |
As of 30 Sep 2025, 3,259 institutional investors reported holding 1,898,395,224 shares of Merck & Co., Inc. - Common Stock (MRK). This represents 75% of the company’s total 2,527,521,347 outstanding shares.
The largest institutional shareholders of Merck & Co., Inc. - Common Stock (MRK) together control 47% 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% | 252,136,910 | -0.31% | 0.32% | $21,161,850,856 |
| BlackRock, Inc. | 8.5% | 214,876,600 | -1.6% | 0.32% | $18,034,593,047 |
| STATE STREET CORP | 4.7% | 118,180,178 | -0.26% | 0.35% | $10,013,630,412 |
| WELLINGTON MANAGEMENT GROUP LLP | 3% | 75,279,104 | -2.1% | 1.1% | $6,318,175,198 |
| GEODE CAPITAL MANAGEMENT, LLC | 2.4% | 59,798,874 | +1.4% | 0.32% | $5,005,979,055 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 2.1% | 53,699,460 | -0.31% | 0.72% | $4,506,996,430 |
| MORGAN STANLEY | 1.8% | 44,586,535 | +0.87% | 0.23% | $3,742,148,141 |
| JPMORGAN CHASE & CO | 1.4% | 35,201,647 | +11% | 0.19% | $2,954,492,255 |
| FMR LLC | 1.3% | 33,426,750 | +5.9% | 0.15% | $2,805,507,051 |
| NORTHERN TRUST CORP | 1.1% | 27,933,141 | -2.8% | 0.3% | $2,344,428,524 |
| BANK OF AMERICA CORP /DE/ | 1% | 26,449,436 | -5.6% | 0.17% | $2,219,901,143 |
| Fisher Asset Management, LLC | 0.95% | 24,068,126 | -3.8% | 0.73% | $2,020,037,862 |
| Bank of New York Mellon Corp | 0.86% | 21,794,354 | -0.92% | 0.33% | $1,829,200,194 |
| Legal & General Group Plc | 0.82% | 20,659,157 | +5.9% | 0.39% | $1,733,923,050 |
| Invesco Ltd. | 0.79% | 19,844,936 | +17% | 0.26% | $1,665,585,453 |
| UBS AM, A DISTINCT BUSINESS UNIT OF UBS ASSET MANAGEMENT AMERICAS LLC | 0.78% | 19,749,865 | -21% | 0.36% | $1,657,606,171 |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | 0.74% | 18,708,703 | -3.8% | 0.99% | $1,570,221,443 |
| UBS Group AG | 0.67% | 16,906,008 | +0.03% | 0.28% | $1,418,921,251 |
| DEUTSCHE BANK AG\ | 0.67% | 16,846,361 | -1.2% | 0.47% | $1,413,915,079 |
| FRANKLIN RESOURCES INC | 0.66% | 16,746,990 | -38% | 0.35% | $1,405,574,906 |
| AMERIPRISE FINANCIAL INC | 0.63% | 15,933,909 | +21% | 0.31% | $1,336,876,840 |
| Amundi | 0.6% | 15,214,187 | -8% | 0.43% | $1,350,713,903 |
| GOLDMAN SACHS GROUP INC | 0.59% | 15,021,367 | -18% | 0.18% | $1,260,743,344 |
| STATE FARM MUTUAL AUTOMOBILE INSURANCE CO | 0.55% | 13,794,969 | 0% | 0.97% | $1,157,811,748 |
| PRICE T ROWE ASSOCIATES INC /MD/ | 0.54% | 13,601,321 | +26% | 0.12% | $1,141,559,000 |
| Period | Reported Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2025 Q4 | 59,819,694 | $6,313,722,488 | -$706,828,802 | $105.26 | 824 |
| 2025 Q3 | 1,898,395,224 | $159,295,600,351 | -$5,261,767,184 | $83.93 | 3,259 |
| 2025 Q2 | 1,962,034,663 | $155,426,643,563 | +$1,505,473,426 | $79.16 | 3,289 |
| 2025 Q1 | 1,938,547,550 | $173,971,684,345 | -$3,605,531,365 | $89.76 | 3,390 |
| 2024 Q4 | 1,968,615,153 | $195,915,700,100 | +$4,604,501,875 | $99.48 | 3,525 |
| 2024 Q3 | 1,909,828,089 | $216,776,477,378 | -$5,513,627,792 | $113.56 | 3,429 |
| 2024 Q2 | 1,949,387,082 | $241,590,280,963 | +$5,245,269,588 | $123.80 | 3,470 |
| 2024 Q1 | 1,891,230,365 | $249,355,099,819 | -$1,736,050,720 | $131.95 | 3,483 |
| 2023 Q4 | 15,042,918 | $1,639,915,212 | -$2,364,235 | $109.02 | 58 |
| 2023 Q3 | 1,839,623,898 | $189,544,804,813 | -$1,451,199,296 | $102.95 | 3,132 |
| 2023 Q2 | 1,880,805,738 | $216,884,507,692 | -$3,474,646,445 | $115.39 | 3,177 |
| 2023 Q1 | 1,903,598,207 | $202,616,259,437 | +$1,654,697,723 | $106.39 | 3,094 |
| 2022 Q4 | 1,889,017,174 | $209,647,788,541 | +$3,417,016,440 | $110.95 | 3,148 |
| 2022 Q3 | 1,874,723,175 | $161,688,005,915 | +$778,701,373 | $86.12 | 2,919 |
| 2022 Q2 | 1,649,092,734 | $150,418,545,265 | +$3,013,097,666 | $91.17 | 2,943 |
| 2022 Q1 | 1,816,247,467 | $149,090,790,997 | -$444,089,053 | $82.05 | 2,883 |
| 2021 Q4 | 1,815,366,100 | $139,186,818,475 | +$179,765,758 | $76.64 | 2,839 |
| 2021 Q3 | 1,830,556,002 | $137,677,338,789 | -$898,267,298 | $75.11 | 2,594 |
| 2021 Q2 | 1,841,399,378 | $143,156,411,127 | -$390,711,637 | $77.77 | 2,616 |
| 2021 Q1 | 1,841,362,487 | $141,944,617,347 | -$951,272,105 | $77.09 | 2,633 |
| 2020 Q4 | 1,617,679,192 | $132,316,464,377 | -$298,686,583 | $81.80 | 2,640 |
| 2020 Q3 | 1,869,646,041 | $154,985,299,116 | -$981,812,172 | $82.95 | 2,508 |
| 2020 Q2 | 1,878,956,208 | $145,317,517,272 | -$662,518,187 | $77.33 | 2,447 |
| 2020 Q1 | 1,879,638,320 | $144,730,480,404 | -$1,724,316,050 | $76.94 | 2,424 |
| 2019 Q4 | 1,899,533,739 | $172,760,023,112 | +$7,225,922 | $90.95 | 2,480 |
| 2019 Q3 | 1,915,743,450 | $161,239,677,017 | -$1,277,747,541 | $84.18 | 2,263 |
| 2019 Q2 | 1,929,720,191 | $161,775,299,651 | +$2,780,901,567 | $83.85 | 2,246 |
| 2019 Q1 | 1,943,645,193 | $161,575,510,952 | -$1,579,856,457 | $83.17 | 2,234 |
| 2018 Q4 | 1,966,063,366 | $150,192,850,758 | -$1,181,125,992 | $76.41 | 2,197 |
| 2018 Q3 | 1,966,997,996 | $139,523,296,299 | +$3,599,298,503 | $70.94 | 2,005 |
| 2018 Q2 | 1,936,420,359 | $117,526,001,653 | -$2,070,503,912 | $60.70 | 1,973 |
| 2018 Q1 | 1,992,371,025 | $108,536,123,656 | -$902,435,276 | $54.47 | 1,945 |
| 2017 Q4 | 2,014,607,442 | $113,373,891,762 | -$1,113,722,789 | $56.27 | 1,959 |
| 2017 Q3 | 2,033,223,396 | $130,174,019,581 | +$1,155,363,616 | $64.03 | 1,880 |
| 2017 Q2 | 2,029,438,139 | $130,124,665,517 | -$1,303,678,211 | $64.09 | 1,878 |
| 2017 Q1 | 2,030,338,897 | $129,013,430,958 | +$11,176,949,775 | $63.54 | 1,888 |
| 2016 Q4 | 2,044,842,686 | $120,419,398,074 | -$1,972,816,237 | $58.87 | 1,867 |
| 2016 Q3 | 2,058,055,851 | $128,346,537,129 | +$1,029,307,248 | $62.41 | 1,763 |
| 2016 Q2 | 2,042,395,087 | $117,679,964,510 | +$35,404,067 | $57.61 | 1,708 |
| 2016 Q1 | 2,040,448,743 | $107,970,875,663 | -$646,824,022 | $52.91 | 1,689 |
| 2015 Q4 | 2,051,962,465 | $108,372,706,818 | -$2,095,726,687 | $52.82 | 1,704 |
| 2015 Q3 | 2,087,301,481 | $103,094,821,180 | -$220,231,777 | $49.39 | 1,615 |
| 2015 Q2 | 2,062,091,704 | $117,400,878,637 | -$176,765,636 | $56.93 | 1,673 |
| 2015 Q1 | 2,102,403,653 | $120,901,975,607 | -$453,429,159 | $57.48 | 1,660 |
| 2014 Q4 | 2,111,608,313 | $119,987,583,705 | -$478,765,742 | $56.79 | 1,663 |
| 2014 Q3 | 2,107,823,692 | $124,945,150,782 | -$1,864,516,289 | $59.28 | 1,566 |
| 2014 Q2 | 2,141,537,528 | $123,875,060,840 | -$1,511,165,409 | $57.85 | 1,563 |
| 2014 Q1 | 2,170,661,260 | $123,217,442,794 | +$3,680,590,961 | $56.77 | 1,545 |