IBB
iShares Biotechnology ETF
stockNASDAQETF
Market OpenOct 5, 2026 11:57:43 AM EDT
205.91USD+0.302%(+0.62)387,449
205.89Bid206.01Ask0.12SpreadPre-marketOct 5, 2026 8:39:30 AM EDT
205.99USD+0.341%(+0.70)
As of 2026-09-15, there were 12,267,170 shares short with a short interest of 24.15%.
IBB Short Interest - Official
Short Interest
IBB Short Position Change - Official
Short Position Change
IBB Short Interest - Official
| Settlement Date1 | Short Interest % | Short Position | Days to Cover2 | Short Position Change | Short Position Change % | Shares Out | Shares Float |
|---|---|---|---|---|---|---|---|
| 2026-09-15 | 24.15 | 12,267,170 | 7.85 | +1,281,791 | +11.67 | 50,800,000 | 50,800,000 |
| 2026-08-31 | 21.88 | 10,985,379 | 6.63 | +544,944 | +5.22 | 50,200,000 | 50,200,000 |
| 2026-08-14 | 21.26 | 10,440,435 | 7.36 | +397,965 | +3.96 | 49,100,000 | 49,100,000 |
| 2026-07-31 | 20.04 | 10,042,470 | 7.06 | -1,867,238 | -15.68 | 50,100,000 | 50,100,000 |
| 2026-07-15 | 24.48 | 11,909,708 | 6.42 | -198,633 | -1.64 | 48,650,000 | 48,650,000 |
| 2026-06-30 | 25.49 | 12,108,341 | 7.08 | -327,070 | -2.63 | 47,500,000 | 47,500,000 |
| 2026-06-15 | 26.49 | 12,435,411 | 8.73 | -573,952 | -4.41 | 46,950,000 | 46,950,000 |
| 2026-05-15 | 27.65 | 13,009,363 | 9.67 | -257,906 | -1.94 | 47,050,000 | 47,050,000 |
| 2026-04-30 | 27.58 | 13,267,269 | 9.08 | +683,229 | +5.43 | 48,100,000 | 48,100,000 |
| 2026-04-15 | 25.84 | 12,584,040 | 9.39 | -714,610 | -5.37 | 48,700,000 | 48,700,000 |
| 2026-03-31 | 27.53 | 13,298,650 | 7.84 | -1,016,741 | -7.10 | 48,300,000 | 48,300,000 |
| 2026-03-13 | 28.89 | 14,315,391 | 7.65 | -577,567 | -3.88 | 49,550,000 | 49,550,000 |
| 2026-02-27 | 30.42 | 14,892,958 | 9.32 | -167,026 | -1.11 | 48,950,000 | 48,950,000 |
| 2026-02-13 | 30.58 | 15,059,984 | 6.94 | +2,338,516 | +18.38 | 49,250,000 | 49,250,000 |
| 2026-01-30 | 25.67 | 12,721,468 | 7.48 | +20,907 | +0.16 | 49,550,000 | 49,550,000 |
| 2026-01-15 | 25.38 | 12,700,561 | 6.17 | +104,819 | +0.83 | 50,050,000 | 50,050,000 |
| 2025-12-31 | 25.12 | 12,595,742 | 8.52 | -782,859 | -5.85 | 50,150,000 | 50,150,000 |
| 2025-12-15 | 26.16 | 13,378,601 | 8.09 | +1,159,933 | +9.49 | 51,150,000 | 51,150,000 |
| 2025-11-28 | 24.68 | 12,218,668 | 4.09 | -145,658 | -1.18 | 49,500,000 | 49,500,000 |
| 2025-11-14 | 30.91 | 12,364,326 | 4.81 | +570,237 | +4.83 | 40,000,000 | 40,000,000 |
| 2025-10-31 | 29.49 | 11,794,089 | 6.03 | +91,611 | +0.78 | 40,000,000 | 40,000,000 |
| 2025-10-15 | 29.26 | 11,702,478 | 5.00 | -850,396 | -6.77 | 40,000,000 | 40,000,000 |
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.