RARE short interest
Ultragenyx Pharmaceutical Inc. · Healthcare · Biotechnology · settlement date 2026-09-30
| Shares short | 20,349,877 |
|---|---|
| Change vs prior report | 3,777,921 (+22.8%) |
| Change over six months | +78.3% |
| Days to cover | 3.13 (sector: 3.78) |
| Average daily volume | 6,502,013 |
| Rank in Healthcare | #615 of 922 by days to cover |
RARE short interest, last 12 months
| Settlement | Shares short | Change | Days to cover | Avg daily volume |
|---|---|---|---|---|
| 2026-09-30 | 20,349,877 | +22.8% | 3.13 | 6,502,013 |
| 2026-09-15 | 16,571,956 | -3.3% | 2.22 | 7,461,648 |
| 2026-08-31 | 17,144,354 | +7.9% | 8.00 | 2,143,209 |
| 2026-08-14 | 15,887,767 | +6.2% | 7.78 | 2,042,547 |
| 2026-07-31 | 14,963,396 | +11.4% | 8.28 | 1,807,137 |
| 2026-07-15 | 13,435,087 | -17.2% | 6.94 | 1,937,159 |
| 2026-06-30 | 16,217,153 | +13.3% | 3.60 | 4,501,008 |
| 2026-06-15 | 14,312,759 | -2.7% | 8.85 | 1,617,040 |
| 2026-05-29 | 14,703,432 | +5.2% | 9.83 | 1,495,515 |
| 2026-05-15 | 13,976,318 | +2.3% | 8.22 | 1,699,704 |
| 2026-04-30 | 13,665,812 | +13.1% | 8.40 | 1,626,704 |
| 2026-04-15 | 12,088,495 | +5.9% | 7.09 | 1,705,231 |
| 2026-03-31 | 11,413,679 | +14.9% | 4.81 | 2,371,600 |
| 2026-03-13 | 9,932,072 | +3.5% | 4.78 | 2,079,795 |
| 2026-02-27 | 9,597,141 | -2.7% | 5.40 | 1,776,857 |
| 2026-02-13 | 9,861,470 | +8.4% | 3.92 | 2,518,345 |
| 2026-01-30 | 9,095,903 | +2.6% | 3.85 | 2,359,920 |
| 2026-01-15 | 8,861,656 | +10.5% | 2.72 | 3,256,998 |
| 2025-12-31 | 8,017,399 | -6.8% | 1.88 | 4,264,555 |
| 2025-12-15 | 8,600,577 | -3.0% | 5.66 | 1,518,656 |
| 2025-11-28 | 8,871,538 | +13.3% | 7.17 | 1,237,643 |
| 2025-11-14 | 7,828,953 | +9.6% | 5.33 | 1,468,323 |
| 2025-10-31 | 7,144,800 | -17.8% | 5.63 | 1,268,645 |
| 2025-10-15 | 8,692,947 | +13.6% | 6.16 | 1,410,509 |
| 2025-09-30 | 7,654,589 | -3.7% | 3.89 | 1,965,491 |
import finzdata as yf
yf.Ticker("RARE").short_interest # every report since 2017
yf.Client().short_interest(["RARE"], start="2018-01-01")Healthcare short interest · RARE price history · Who owns RARE · All short interest