VRTX
Vertex Pharmaceuticals Inc
stockNASDAQ
At CloseOct 13, 2026 3:59:59 PM EDT
485.38USD-4.264%(-21.62)1,187,512
Pre-marketOct 14, 2026 8:14:30 AM EDT
489.00USD+0.779%(+3.78)
After-hoursOct 13, 2026 4:18:30 PM EDT
485.05USD-0.068%(-0.33)
As of 2026-09-30, there were 4,503,200 shares short with a short interest of 1.78%.
VRTX Short Interest - Official
VRTX Short Position Change - Official
VRTX 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 | 1.78 | 4,503,200 | 4.24 | -213,667 | -4.53 | 253,460,924 | 253,234,192 |
| 2026-09-15 | 1.86 | 4,716,867 | 5.03 | +57,118 | +1.23 | 253,460,924 | 253,234,192 |
| 2026-08-31 | 1.84 | 4,659,749 | 4.51 | +512,776 | +12.37 | 253,460,924 | 253,234,192 |
| 2026-08-14 | 1.64 | 4,146,973 | 3.09 | +204,037 | +5.17 | 253,460,924 | 253,234,192 |
| 2026-07-31 | 1.56 | 3,942,936 | 2.99 | -1,043,755 | -20.93 | 253,805,417 | 253,038,925 |
| 2026-07-15 | 1.97 | 4,986,691 | 3.10 | +48,219 | +0.98 | 253,805,417 | 253,071,919 |
| 2026-06-30 | 1.95 | 4,938,472 | 2.01 | +321,504 | +6.96 | 253,805,417 | 253,026,234 |
| 2026-06-15 | 1.82 | 4,616,968 | 3.82 | +155,195 | +3.48 | 253,805,417 | 253,021,158 |
| 2026-05-15 | 1.76 | 4,461,773 | 3.64 | +288,944 | +6.92 | 253,805,417 | 253,088,254 |
| 2026-04-30 | 1.65 | 4,172,829 | 4.31 | -163,673 | -3.77 | 254,359,735 | 252,957,675 |
| 2026-04-15 | 1.71 | 4,336,502 | 3.78 | +314,648 | +7.82 | 254,359,735 | 252,957,675 |
| 2026-03-31 | 1.59 | 4,021,854 | 2.69 | -105,575 | -2.56 | 254,034,190 | 252,957,675 |
| 2026-03-13 | 1.63 | 4,127,429 | 2.85 | -305,936 | -6.90 | 254,034,190 | 252,957,675 |
| 2026-02-27 | 1.75 | 4,433,365 | 3.51 | -32,817 | -0.73 | 254,034,190 | 252,957,675 |
| 2026-02-13 | 1.77 | 4,466,182 | 2.66 | +43,692 | +0.99 | 253,718,831 | 252,957,675 |
| 2026-01-30 | 1.75 | 4,422,490 | 2.79 | -1,475 | -0.03 | 253,718,831 | 252,957,675 |
| 2026-01-15 | 1.75 | 4,423,965 | 3.08 | -598,317 | -11.91 | 253,718,831 | 252,957,675 |
| 2025-12-31 | 1.99 | 5,022,282 | 4.09 | +735,161 | +17.15 | 253,718,831 | 252,957,675 |
| 2025-12-15 | 1.69 | 4,287,121 | 3.15 | -168,096 | -3.77 | 253,718,831 | 252,952,600 |
| 2025-11-28 | 1.76 | 4,455,217 | 3.20 | +449,058 | +11.21 | 253,718,831 | 252,932,303 |
| 2025-11-14 | 1.58 | 4,006,159 | 2.68 | -125,518 | -3.04 | 253,718,831 | 252,906,931 |
| 2025-10-31 | 1.62 | 4,131,677 | 3.22 | +575,911 | +16.20 | 256,390,651 | 255,577,893 |
| 2025-10-15 | 1.39 | 3,555,766 | 2.65 | -1,292 | -0.04 | 256,390,651 | 255,577,893 |
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.