MRK
Merck & Co., Inc.
stockNYSE
At CloseOct 21, 2026 3:59:57 PM EDT
149.88USD+1.065%(+1.58)9,004,018
Pre-marketOct 21, 2026 9:26:30 AM EDT
147.10USD-0.809%(-1.20)
After-hoursOct 21, 2026 4:11:30 PM EDT
149.80USD-0.057%(-0.09)
MRK Off Exchange & Dark Pool Summary
Today’s Off Exchange & Dark Pool volume is 3,743,834, which is 41.66% of today’s total volume. Today’s Lit volume is 5,243,781 (58.34%). Over the past 30 days, the average Off Exchange & Dark Pool volume has been 42.55%, and the average Lit volume 57.45%.
| Exchange | Day % | Volume | 30D % |
|---|---|---|---|
| Off Exchange1 | 41.66% | 3,743,834 | 42.55% |
| NYSE | 36.50% | 3,280,463 | 34.98% |
| Nasdaq GSM | 7.82% | 702,517 | 7.31% |
| IEX | 5.26% | 473,082 | 3.72% |
| Cboe BZX | 2.80% | 251,267 | 2.78% |
| NYSE Arca | 2.30% | 206,273 | 3.84% |
| Cboe EDGX | 1.09% | 97,560 | 1.36% |
| CHX | 0.97% | 87,241 | 1.65% |
| MEMX | 0.35% | 31,346 | 0.59% |
| Cboe EDGA | 0.23% | 20,335 | 0.39% |
| Nasdaq BX | 0.22% | 20,136 | 0.13% |
| MIAX Pearl | 0.19% | 17,262 | 0.15% |
| Nasdaq PHLX | 0.19% | 16,947 | 0.09% |
| Cboe BYX | 0.16% | 14,251 | 0.23% |
| 24X National | 0.12% | 10,388 | 0.02% |
| NYSE National | 0.09% | 7,931 | 0.09% |
| NYSE American | 0.05% | 4,612 | 0.09% |
| TXSE | 0.02% | 2,170 | 0.03% |
MRK Volume by Exchange
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MRK Volume by Exchange
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MRK Volume by Exchange · History
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| Date | Off Exchange1 | NYSE | Nasdaq GSM | IEX | Cboe BZX | NYSE Arca | Cboe EDGX | CHX | MEMX | Cboe EDGA | Nasdaq BX | MIAX Pearl | Nasdaq PHLX | Cboe BYX | 24X National | NYSE National | NYSE American | TXSE | LTSE |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026-10-21 | 41.66 | 36.50 | 7.82 | 5.26 | 2.80 | 2.30 | 1.09 | 0.97 | 0.35 | 0.23 | 0.22 | 0.19 | 0.19 | 0.16 | 0.12 | 0.09 | 0.05 | 0.02 | 0.00 |
| 2026-10-20 | 53.33 | 24.55 | 6.20 | 4.03 | 2.26 | 2.72 | 1.11 | 4.49 | 0.55 | 0.21 | 0.10 | 0.11 | 0.06 | 0.12 | 0.00 | 0.07 | 0.06 | 0.02 | 0.00 |
| 2026-10-19 | 48.45 | 33.03 | 6.12 | 3.73 | 2.24 | 1.84 | 0.88 | 2.54 | 0.32 | 0.15 | 0.06 | 0.12 | 0.08 | 0.15 | 0.03 | 0.04 | 0.20 | 0.01 | 0.00 |
| 2026-10-16 | 36.35 | 41.22 | 7.54 | 4.87 | 2.48 | 3.69 | 1.13 | 1.11 | 0.47 | 0.27 | 0.09 | 0.13 | 0.09 | 0.29 | 0.00 | 0.11 | 0.12 | 0.04 | 0.00 |
| 2026-10-15 | 39.90 | 31.71 | 10.21 | 3.25 | 2.66 | 5.41 | 1.80 | 2.73 | 1.07 | 0.41 | 0.14 | 0.19 | 0.06 | 0.22 | 0.01 | 0.08 | 0.08 | 0.08 | 0.00 |
| 2026-10-14 | 46.74 | 27.40 | 8.95 | 4.39 | 3.64 | 4.93 | 1.73 | 0.18 | 0.54 | 0.52 | 0.18 | 0.13 | 0.05 | 0.30 | 0.01 | 0.11 | 0.18 | 0.03 | 0.00 |
| 2026-10-13 | 42.81 | 35.22 | 7.59 | 4.30 | 3.41 | 3.33 | 1.36 | 0.65 | 0.43 | 0.45 | 0.06 | 0.09 | 0.04 | 0.14 | 0.02 | 0.03 | 0.03 | 0.04 | 0.00 |
| 2026-10-12 | 49.61 | 29.40 | 8.79 | 3.59 | 3.17 | 2.59 | 0.94 | 0.62 | 0.43 | 0.32 | 0.07 | 0.10 | 0.08 | 0.16 | 0.00 | 0.04 | 0.04 | 0.02 | 0.00 |
| 2026-10-09 | 52.18 | 19.84 | 9.11 | 6.05 | 3.54 | 3.70 | 2.06 | 0.10 | 0.99 | 0.93 | 0.31 | 0.24 | 0.15 | 0.40 | 0.01 | 0.19 | 0.15 | 0.06 | 0.00 |
| 2026-10-08 | 48.75 | 24.36 | 9.25 | 5.23 | 4.11 | 3.90 | 1.50 | 0.38 | 0.90 | 0.40 | 0.07 | 0.47 | 0.16 | 0.24 | 0.01 | 0.11 | 0.13 | 0.05 | 0.00 |
| 2026-10-07 | 43.74 | 33.82 | 7.88 | 3.89 | 2.77 | 3.40 | 1.86 | 0.39 | 0.55 | 0.45 | 0.11 | 0.20 | 0.17 | 0.45 | 0.03 | 0.08 | 0.18 | 0.02 | 0.00 |
| 2026-10-06 | 45.33 | 27.11 | 7.31 | 4.57 | 4.69 | 6.34 | 1.87 | 0.46 | 0.78 | 0.41 | 0.14 | 0.37 | 0.13 | 0.15 | 0.03 | 0.12 | 0.13 | 0.05 | 0.00 |
| 2026-10-05 | 45.07 | 27.54 | 9.23 | 4.09 | 3.27 | 4.96 | 1.97 | 1.40 | 0.79 | 0.51 | 0.27 | 0.13 | 0.08 | 0.32 | 0.04 | 0.19 | 0.11 | 0.03 | 0.00 |
| 2026-10-02 | 56.09 | 26.13 | 5.73 | 3.62 | 2.55 | 2.98 | 1.11 | 0.20 | 0.45 | 0.28 | 0.12 | 0.10 | 0.03 | 0.43 | 0.01 | 0.10 | 0.05 | 0.04 | 0.00 |
| 2026-10-01 | 40.13 | 36.09 | 8.12 | 3.59 | 2.84 | 4.39 | 1.79 | 0.65 | 0.72 | 0.73 | 0.22 | 0.16 | 0.08 | 0.28 | 0.01 | 0.13 | 0.06 | 0.02 | 0.00 |
| 2026-09-30 | 39.62 | 35.95 | 7.81 | 3.86 | 2.55 | 5.19 | 1.99 | 0.55 | 0.90 | 0.66 | 0.20 | 0.18 | 0.06 | 0.21 | 0.01 | 0.16 | 0.07 | 0.02 | 0.00 |
| 2026-09-29 | 50.38 | 28.69 | 6.57 | 5.08 | 2.13 | 3.27 | 1.44 | 0.67 | 0.47 | 0.57 | 0.11 | 0.09 | 0.08 | 0.22 | 0.00 | 0.10 | 0.10 | 0.02 | 0.00 |
| 2026-09-28 | 47.03 | 29.70 | 8.44 | 3.08 | 3.96 | 3.87 | 1.71 | 0.04 | 0.53 | 0.69 | 0.18 | 0.11 | 0.04 | 0.36 | 0.01 | 0.13 | 0.14 | 0.01 | 0.00 |
| 2026-09-25 | 47.81 | 23.84 | 7.59 | 3.35 | 3.23 | 5.88 | 1.83 | 4.45 | 0.43 | 0.61 | 0.17 | 0.09 | 0.09 | 0.28 | 0.08 | 0.14 | 0.08 | 0.03 | 0.00 |
| 2026-09-24 | 43.26 | 31.21 | 9.45 | 4.11 | 3.34 | 5.45 | 1.10 | 0.45 | 0.64 | 0.24 | 0.11 | 0.07 | 0.07 | 0.36 | 0.01 | 0.06 | 0.03 | 0.04 | 0.00 |
| 2026-09-23 | 39.97 | 34.36 | 9.28 | 4.20 | 2.80 | 5.38 | 1.04 | 0.92 | 0.74 | 0.24 | 0.22 | 0.14 | 0.18 | 0.28 | 0.00 | 0.09 | 0.15 | 0.00 | 0.00 |
| 2026-09-22 | 39.50 | 25.88 | 9.09 | 4.26 | 2.84 | 3.82 | 1.28 | 11.15 | 0.58 | 0.53 | 0.16 | 0.26 | 0.04 | 0.22 | 0.00 | 0.13 | 0.20 | 0.05 | 0.00 |
| 2026-09-21 | 47.57 | 31.05 | 7.46 | 3.59 | 2.52 | 3.62 | 1.88 | 0.12 | 0.57 | 0.48 | 0.18 | 0.09 | 0.13 | 0.34 | 0.07 | 0.11 | 0.15 | 0.04 | 0.00 |
| 2026-09-18 | 23.78 | 70.46 | 2.22 | 0.74 | 0.68 | 1.16 | 0.33 | 0.12 | 0.15 | 0.09 | 0.04 | 0.05 | 0.04 | 0.08 | 0.01 | 0.02 | 0.02 | 0.01 | 0.00 |
| 2026-09-17 | 41.18 | 35.33 | 5.53 | 3.44 | 2.63 | 3.22 | 1.25 | 6.13 | 0.64 | 0.18 | 0.04 | 0.16 | 0.04 | 0.08 | 0.04 | 0.03 | 0.05 | 0.02 | 0.00 |
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