| 2024 | 2 | 0 | $15,681,419,828 | $0 | - |
| Merck Us Savings Plan and Msd Ee Stock Purchase and Savings Plan Trust - Participant Directed | - | - | $14,637,205,865 | - | - |
| Merck Us Savings Plan and Msd Ee Stock Purchase and Savings Plan Trust - Merck Stock | - | - | $1,044,213,963 | - | - |
| 2023 | 2 | 0 | $14,075,720,559 | $0 | - |
| Merck Us Savings Plan and Msd Ee Stock Purchase and Savings Plan Trust - Participant Directed | - | - | $12,850,285,587 | - | - |
| Merck Us Savings Plan and Msd Ee Stock Purchase and Savings Plan Trust - Merck Stock | - | - | $1,225,434,972 | - | - |
| 2022 | 2 | 0 | $12,137,498,704 | $0 | - |
| Merck Us Savings Plan and Msd Ee Stock Purchase and Savings Plan Trust - Participant Directed | - | - | $10,836,832,974 | - | - |
| Merck Us Savings Plan and Msd Ee Stock Purchase and Savings Plan Trust - Merck Stock | - | - | $1,300,665,730 | - | - |
| 2021 | 2 | 0 | $14,373,572,047 | $0 | - |
| Merck Us Savings Plan and Msd Ee Stock Purchase and Savings Plan Trust - Participant Directed | - | - | $13,420,050,862 | - | - |
| Merck Us Savings Plan and Msd Ee Stock Purchase and Savings Plan Trust - Merck Stock | - | - | $953,521,185 | - | - |
| 2020 | 2 | 0 | $13,052,243,494 | $0 | - |
| Merck Us Savings Plan and Msd Ee Stock Purchase and Savings Plan Trust - Participant Directed | - | - | $11,973,696,156 | - | - |
| Merck Us Savings Plan and Msd Ee Stock Purchase and Savings Plan Trust - Merck Stock | - | - | $1,078,547,338 | - | - |
| 2019 | 2 | 0 | $11,543,573,014 | $0 | - |
| Merck Us Savings Plan and Msd Ee Stock Purchase and Savings Plan Trust - Participant Directed | - | - | $10,295,178,568 | - | - |
| Merck Us Savings Plan and Msd Ee Stock Purchase and Savings Plan Trust - Merck Stock | - | - | $1,248,394,446 | - | - |
| 2018 | 2 | 0 | $9,503,621,166 | $0 | - |
| Merck Us Savings Plan and Msd Ee Stock Purchase and Savings Plan Trust - Participant Directed | - | - | $8,405,918,863 | - | - |
| Merck Us Savings Plan and Msd Ee Stock Purchase and Savings Plan Trust - Merck Stock | - | - | $1,097,702,303 | - | - |
| 2017 | 2 | 0 | $10,004,696,976 | $0 | - |
| Merck Us Savings Plan and Msd Ee Stock Purchase and Savings Plan Trust - Participant Directed | - | - | $9,153,805,213 | - | - |
| Merck Us Savings Plan and Msd Ee Stock Purchase and Savings Plan Trust - Merck Stock | - | - | $850,891,763 | - | - |
| 2016 | 2 | 0 | $8,725,095,668 | $0 | - |
| Merck Us Savings Plan and Msd Ee Stock Purchase and Savings Plan Trust - Participant Directed | - | - | $7,790,150,376 | - | - |
| Merck Us Savings Plan and Msd Ee Stock Purchase and Savings Plan Trust - Merck Stock | - | - | $934,945,292 | - | - |
| 2015 | 2 | 0 | $8,234,843,420 | $0 | - |
| Merck Us Savings Plan and Msd Ee Stock Purchase and Savings Plan Trust - Participant Directed | - | - | $7,338,542,313 | - | - |
| Merck Us Savings Plan and Msd Ee Stock Purchase and Savings Plan Trust - Merck Stock | - | - | $896,301,107 | - | - |
| 2014 | 2 | 0 | $8,561,662,332 | $0 | - |
| Merck Us Savings Plan and Msd Ee Stock Purchase and Savings Plan Trust - Participant Directed | - | - | $7,541,308,862 | - | - |
| Merck Us Savings Plan and Msd Ee Stock Purchase and Savings Plan Trust - Merck Stock | - | - | $1,020,353,470 | - | - |
| 2013 | 2 | 0 | $8,600,464,806 | $0 | - |
| Merck Us Savings Plan and Msd Ee Stock Purchase and Savings Plan Trust - Participant Directed | - | - | $7,615,434,065 | - | - |
| Merck Us Savings Plan and Msd Ee Stock Purchase and Savings Plan Trust - Merck Stock | - | - | $985,030,741 | - | - |
| 2012 | 2 | 0 | $7,271,075,541 | $0 | - |
| Merck Us Savings Plan and Msd Ee Stock Purchase and Savings Plan Trust - Participant Directed | - | - | $6,344,103,559 | - | - |
| Merck Us Savings Plan and Msd Ee Stock Purchase and Savings Plan Trust - Merck Stock | - | - | $926,971,982 | - | - |
| 2011 | 2 | 0 | $6,601,513,462 | $0 | - |
| Merck Us Savings Plan and Msd Ee Stock Purchase and Savings Plan Trust - Participant Directed | - | - | $5,708,596,748 | - | - |
| Merck Us Savings Plan and Msd Ee Stock Purchase and Savings Plan Trust - Merck Stock | - | - | $892,916,714 | - | - |
| 2010 | 2 | 0 | $4,303,592,162 | $0 | - |
| Merck Us Savings Plan and Msd Ee Stock Purchase and Savings Plan Trust - Participant Directed | - | - | $3,570,175,451 | - | - |
| Merck Us Savings Plan and Msd Ee Stock Purchase and Savings Plan Trust - Merck Stock | - | - | $733,416,711 | - | - |
| 2009 | 2 | 0 | $3,849,430,903 | $0 | - |
| Merck Us Savings Plan and Msd Ee Stock Purchase and Savings Plan Trust - Participant Directed | - | - | $3,102,257,455 | - | - |
| Merck Us Savings Plan and Msd Ee Stock Purchase and Savings Plan Trust - Merck Stock | - | - | $747,173,448 | - | - |
| 2008 | 2 | 0 | $3,027,532,315 | $0 | - |
| Merck Us Savings Plan and Msd Ee Stock Purchase and Savings Plan Trust - Participant Directed | - | 0 | $2,407,540,437 | - | - |
| Merck Us Savings Plan and Msd Ee Stock Purchase and Savings Plan Trust - Merck Stock | - | 0 | $619,991,878 | - | - |
| 2007 | 2 | 0 | $4,616,420,503 | $0 | - |
| Merck Us Savings Plan and Msd Ee Stock Purchase and Savings Plan Trust - Participant Directed | - | 0 | $3,419,359,044 | - | - |
| Merck Us Savings Plan and Msd Ee Stock Purchase and Savings Plan Trust - Merck Stock | - | 0 | $1,197,061,459 | - | - |
| 2006 | 2 | 0 | $3,924,037,688 | $0 | - |
| Merck Us Savings Plan and Msd Ee Stock Purchase and Savings Plan Trust - Participant Directed | - | 0 | $2,993,883,921 | - | - |
| Merck Us Savings Plan and Msd Ee Stock Purchase and Savings Plan Trust - Merck Stock | - | 0 | $930,153,767 | - | - |
| 2005 | 2 | 0 | $3,268,952,264 | $0 | - |
| Merck Us Savings Plan and Msd Ee Stock Purchase and Savings Plan Trust - Participant Directed | - | 0 | $2,579,950,103 | - | - |
| Merck Us Savings Plan and Msd Ee Stock Purchase and Savings Plan Trust - Merck Stock | - | 0 | $689,002,161 | - | - |
| 2004 | 2 | 0 | $2,997,792,088 | $0 | - |
| Merck Us Savings Plan and Msd Ee Stock Purchase and Savings Plan Trust - Participant Directed | - | 0 | $2,208,863,263 | - | - |
| Merck Us Savings Plan and Msd Ee Stock Purchase and Savings Plan Trust - Merck Stock | - | 0 | $788,928,825 | - | - |
| 2003 | 2 | 0 | $3,087,184,290 | $0 | - |
| Merck Us Savings Plan and Msd Ee Stock Purchase and Savings Plan Trust - Participant Directed | - | 0 | $1,880,233,049 | - | - |
| Merck Us Savings Plan and Msd Ee Stock Purchase and Savings Plan Trust - Merck Stock | - | 0 | $1,206,951,241 | - | - |
| 2002 | 2 | 0 | $3,133,806,426 | $0 | - |
| Merck Us Savings Plan and Msd Ee Stock Purchase and Savings Plan Trust - Merck Stock | - | 0 | $1,661,383,905 | - | - |
| Merck Us Savings Plan and Msd Ee Stock Purchase and Savings Plan Trust - Participant Directed | - | 0 | $1,472,422,521 | - | - |
| 2001 | 2 | 0 | $3,270,116,759 | $0 | - |
| Merck Us Savings Plan and Msd Ee Stock Purchase and Savings Plan Trust - Merck Stock | - | 0 | $1,713,814,350 | - | - |
| Merck Us Savings Plan and Msd Ee Stock Purchase and Savings Plan Trust - Participant Directed | - | 0 | $1,556,302,409 | - | - |
| 2000 | 1 | 0 | $4,345,322,907 | $279,167,931 | - |
| Merck Us Savings Plan and Msd Ee Stock Purchase and Savings Plan Trust - Participant Directed | - | 0 | $4,345,322,907 | $279,167,931 | - |