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MRK · Merck & Co., Inc. · Off Exchange

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$145.31 -3.97 (-2.66%) At close · Sep 30
S&P 500 member Russell 1000 member Dow 30 member Rebalance outlook locked
Market Cap
$367.07B
Shares
2.47B
Volume · Sep 30 10.23M Avg daily vol (3M) 9.84M

Weekly off-exchange (dark pool / OTC) trading volume reported to FINRA under its OTC/ATS Transparency data. ATS volume is executed on alternating trading systems (dark pools); non-ATS OTC is other over-the-counter dealer volume. The off-exchange share is total off-exchange volume as a percentage of consolidated weekly trading volume for the same Monday–Friday week.

1M 3M 6M 1Y 5Y All

Off-Exchange Volume History

Week Start ATS Volume Non-ATS OTC Volume Total Off-Exchange % of FINRA Weekly Volume
2026-08-24 13,257,928 12,245,985 25,503,913 47.0%
2026-08-17 20,928,582 18,620,821 39,549,403 47.2%
2026-08-10 8,203,038 9,484,800 17,687,838 45.9%
2026-08-03 12,294,052 11,635,096 23,929,148 50.0%
2026-07-27 8,462,463 11,803,316 20,265,779 50.3%
2026-07-20 8,326,161 8,479,515 16,805,676 44.8%
2026-07-13 10,502,555 10,874,650 21,377,205 42.1%
2026-07-06 8,554,424 9,715,247 18,269,671 42.5%
2026-06-29 8,759,615 7,179,691 15,939,306 39.8%
2026-06-22 13,540,029 13,323,868 26,863,897 41.7%
2026-06-15 12,267,662 12,639,105 24,906,767 37.7%
2026-06-08 13,887,148 11,140,201 25,027,349 44.4%
2026-06-01 10,711,044 13,609,573 24,320,617 42.0%
2026-05-25 8,181,440 8,419,533 16,600,973 38.6%
2026-05-18 10,647,866 9,699,909 20,347,775 43.4%
2026-05-11 7,707,171 10,915,321 18,622,492 46.2%
2026-05-04 7,357,654 7,983,779 15,341,433 42.8%
2026-04-27 13,684,142 10,768,189 24,452,331 44.3%
2026-04-20 10,475,890 7,846,674 18,322,564 43.5%
2026-04-13 10,437,448 12,127,178 22,564,626 41.7%
2026-04-06 10,311,571 9,638,274 19,949,845 45.4%
2026-03-30 7,337,026 6,652,952 13,989,978 40.5%
2026-03-23 8,310,094 9,560,142 17,870,236 43.0%
2026-03-16 9,244,552 15,798,452 25,043,004 36.7%
2026-03-09 7,812,637 8,850,118 16,662,755 41.4%
2026-03-02 10,467,618 15,575,991 26,043,609 47.4%
2026-02-23 11,602,062 12,189,489 23,791,551 41.6%
2026-02-16 7,422,264 6,348,571 13,770,835 38.2%
2026-02-09 14,111,346 11,544,588 25,655,934 41.1%
2026-02-02 25,788,125 23,102,455 48,890,580 47.5%
2026-01-26 13,515,203 11,428,708 24,943,911 43.1%
2026-01-19 12,786,216 8,097,049 20,883,265 43.6%
2026-01-12 14,057,151 12,921,952 26,979,103 46.0%
2026-01-05 19,045,234 16,968,782 36,014,016 46.2%
2025-12-29 6,621,702 6,850,173 13,471,875 41.9%
2025-12-22 9,789,129 7,084,074 16,873,203 39.9%
2025-12-15 18,263,928 25,856,118 44,120,046 41.7%
2025-12-08 15,733,742 15,249,808 30,983,550 43.7%
2025-12-01 12,654,994 18,096,492 30,751,486 45.4%
2025-11-24 15,973,939 13,293,268 29,267,207 42.2%
2025-11-17 20,716,428 16,648,724 37,365,152 40.2%
2025-11-10 14,098,474 14,618,160 28,716,634 39.5%
2025-11-03 10,544,203 11,113,698 21,657,901 38.7%
2025-10-27 11,319,863 11,119,561 22,439,424 40.4%
2025-10-20 7,309,945 10,550,724 17,860,669 39.7%
2025-10-13 9,056,371 9,421,798 18,478,169 38.6%
2025-10-06 8,561,848 10,730,426 19,292,274 36.4%
Showing 1–47 of 47 weeks
Key facts CIK 310158 CUSIP 58933Y105 13F (30d) 93 filings 39 filers Visit website Investor relations