Security Snapshot

Merck & Co., Inc. - Common Stock (MRK) Institutional Ownership

CUSIP: 58933Y105

13F Institutional Holders and Ownership History from Q1 2014 to Q1 2026

Latest Period

Q4 2025

Institutions Reporting

3,599

Shares (Excl. Options)

1,955,416,953

Price

$105.26

Type / Class
Equity / Common Stock
Symbol
MRK on NYSE
Shares outstanding
2,527,521,347
Price per share
$120.29
All holders as of 31 Dec 2025
Q4 2025
Total 13F shares
1,955,416,953
Total reported value
$206,075,432,728
% of total 13F portfolios
0.15%
Share change
+50,879,400
Value change
+$5,609,812,033
Number of holders
3,599
Price from insider filings
$120.29
Reported Shares, Excluding Options vs Price
Reported Value, Excluding Options
Total Investors

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Quick Takeaways

  • MRK - Merck & Co., Inc. - Common Stock is tracked under CUSIP 58933Y105.
  • 3599 institutions reported positions in Q4 2025.
  • Schedule 13D/13G significant owner rows are not currently available.

What Changed

  • Holder count moved from 3,599 to 223 between Q4 2025 and Q1 2026.
  • Reported value moved from $206,075,432,728 to $865,057,579.

Why This Matters

  • You can quickly see who holds this security, then open quarter and manager detail pages for full evidence.
  • 13F and Schedule 13D/13G sections are kept together so you can cross-check institutional and beneficial ownership context.

Official SEC Source

Backed by Form 13F

Ownership context comes from SEC Form 13F and, when available, Schedule 13D/13G filings.

See Original Filing

Investment Quick Answers

What is CUSIP 58933Y105?
CUSIP 58933Y105 identifies MRK - Merck & Co., Inc. - Common Stock in SEC 13F datasets.

Where can I see the latest institutional holders?
Review the Q4 2025 holders report and the ownership history table below.

As of 31 Dec 2025, 3,599 institutional investors reported holding 1,955,416,953 shares of Merck & Co., Inc. - Common Stock (MRK). This represents 77% of the company’s total 2,527,521,347 outstanding shares.

Top 25 Institutional Shareholders

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% 19,348,718 +29% 0.29% $2,036,645,998
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

Institutional Holders of Merck & Co., Inc. - Common Stock (MRK) across Reporting Periods

Period Reported Shares, Excl. Options Value, Excl. Options Value Change Price (Median) Investors
2026 Q1 7,283,304 $865,057,579 -$47,305,705 $120.29 223
2025 Q4 1,955,416,953 $206,075,432,728 +$5,609,812,033 $105.26 3,599
2025 Q3 1,901,091,184 $159,522,013,920 -$5,198,827,945 $83.93 3,277
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

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