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)
As of 2026-09-30, there were 28,271,750 shares short with a short interest of 1.15%.
MRK Short Interest - Official
MRK Short Position Change - Official
MRK Short Interest - Official
| Settlement Date1 | Short Interest % | Short Position | Days to Cover2 | Short Position Change | Short Position Change % | Shares Out | Shares Float |
|---|---|---|---|---|---|---|---|
| 2026-09-30 | 1.15 | 28,271,750 | 2.53 | -6,158,962 | -17.89 | 2,467,171,638 | 2,465,475,586 |
| 2026-09-15 | 1.40 | 34,430,712 | 4.23 | +4,143,365 | +13.68 | 2,467,171,638 | 2,465,475,586 |
| 2026-08-31 | 1.23 | 30,287,347 | 2.23 | +5,780,827 | +23.59 | 2,467,171,638 | 2,465,475,586 |
| 2026-08-14 | 0.99 | 24,506,520 | 2.84 | -3,774,855 | -13.35 | 2,467,171,638 | 2,465,475,586 |
| 2026-07-31 | 1.15 | 28,281,375 | 3.25 | -1,077,653 | -3.67 | 2,469,824,415 | 2,465,699,808 |
| 2026-07-15 | 1.19 | 29,359,028 | 3.42 | -2,022,239 | -6.44 | 2,469,824,415 | 2,465,699,808 |
| 2026-06-30 | 1.27 | 31,381,267 | 2.30 | +1,113,975 | +3.68 | 2,469,824,415 | 2,465,724,506 |
| 2026-06-15 | 1.23 | 30,267,292 | 2.57 | +1,207,105 | +4.15 | 2,469,824,415 | 2,465,724,506 |
| 2026-05-15 | 1.18 | 29,060,187 | 3.63 | +2,854,319 | +10.89 | 2,469,824,415 | 2,465,773,903 |
| 2026-04-30 | 1.06 | 26,205,868 | 2.55 | -1,289,822 | -4.69 | 2,469,879,206 | 2,478,026,480 |
| 2026-04-15 | 1.11 | 27,495,690 | 3.31 | -225,267 | -0.81 | 2,469,879,206 | 2,478,026,480 |
| 2026-03-31 | 1.12 | 27,720,957 | 2.53 | -1,423,923 | -4.89 | 2,472,392,003 | 2,478,026,480 |
| 2026-03-13 | 1.18 | 29,144,880 | 3.06 | -1,970,931 | -6.33 | 2,472,392,003 | 2,478,026,480 |
| 2026-02-27 | 1.26 | 31,115,811 | 3.00 | +2,985,780 | +10.61 | 2,472,392,003 | 2,478,026,480 |
| 2026-02-13 | 1.14 | 28,130,031 | 1.70 | -599,371 | -2.09 | 2,482,022,536 | 2,478,026,480 |
| 2026-01-30 | 1.16 | 28,729,402 | 2.38 | -4,925,284 | -14.63 | 2,482,022,536 | 2,478,026,480 |
| 2026-01-15 | 1.36 | 33,654,686 | 2.55 | +1,080,962 | +3.32 | 2,482,022,536 | 2,478,026,480 |
| 2025-12-31 | 1.31 | 32,573,724 | 2.33 | -4,588,580 | -12.35 | 2,482,022,536 | 2,478,026,480 |
| 2025-12-15 | 1.50 | 37,162,304 | 2.63 | +5,218,993 | +16.34 | 2,482,022,536 | 2,478,026,480 |
| 2025-11-28 | 1.29 | 31,943,311 | 1.77 | +4,317,160 | +15.63 | 2,482,022,536 | 2,478,026,480 |
| 2025-11-14 | 1.11 | 27,626,151 | 2.15 | +1,810,797 | +7.01 | 2,482,022,536 | 2,478,076,120 |
| 2025-10-31 | 1.03 | 25,815,354 | 2.52 | -885,065 | -3.31 | 2,497,783,211 | 2,495,379,633 |
Historical data is split-adjusted.
1 Data from Finra. Finra publishes an updated file every two weeks.
2 Days to Cover (DTC) is also called Short Ratio. This is the Short Position / Average Daily Trading Volume.