ALNY short interest
Alnylam Pharmaceuticals Inc. · Healthcare · Biotechnology · settlement date 2026-09-30
| Shares short | 7,711,495 |
|---|---|
| Change vs prior report | 517,398 (+7.2%) |
| Change over six months | +52.5% |
| Days to cover | 6.45 (sector: 3.78) |
| Average daily volume | 1,195,107 |
| Rank in Healthcare | #285 of 922 by days to cover |
ALNY short interest, last 12 months
| Settlement | Shares short | Change | Days to cover | Avg daily volume |
|---|---|---|---|---|
| 2026-09-30 | 7,711,495 | +7.2% | 6.45 | 1,195,107 |
| 2026-09-15 | 7,194,097 | +13.5% | 4.13 | 1,742,234 |
| 2026-08-31 | 6,340,087 | +32.9% | 3.90 | 1,625,574 |
| 2026-08-14 | 4,770,978 | -0.7% | 2.36 | 2,018,399 |
| 2026-07-31 | 4,803,194 | -16.8% | 2.18 | 2,204,446 |
| 2026-07-15 | 5,773,373 | -0.5% | 3.24 | 1,782,477 |
| 2026-06-30 | 5,799,788 | +6.7% | 4.22 | 1,373,085 |
| 2026-06-15 | 5,437,337 | +2.6% | 4.76 | 1,142,712 |
| 2026-05-29 | 5,300,015 | -1.8% | 5.78 | 917,637 |
| 2026-05-15 | 5,398,804 | +13.1% | 5.13 | 1,052,011 |
| 2026-04-30 | 4,773,214 | -5.2% | 4.02 | 1,186,604 |
| 2026-04-15 | 5,034,063 | -0.4% | 5.12 | 983,971 |
| 2026-03-31 | 5,056,408 | +15.7% | 4.01 | 1,262,297 |
| 2026-03-13 | 4,369,615 | -4.4% | 4.18 | 1,045,068 |
| 2026-02-27 | 4,572,652 | -12.8% | 4.46 | 1,025,083 |
| 2026-02-13 | 5,244,475 | -0.7% | 2.80 | 1,872,268 |
| 2026-01-30 | 5,282,136 | -5.1% | 3.66 | 1,442,702 |
| 2026-01-15 | 5,565,961 | +0.6% | 3.72 | 1,496,902 |
| 2025-12-31 | 5,532,159 | +32.2% | 2.89 | 1,911,674 |
| 2025-12-15 | 4,184,652 | +5.7% | 3.19 | 1,310,181 |
| 2025-11-28 | 3,960,190 | -7.5% | 4.09 | 969,124 |
| 2025-11-14 | 4,279,250 | +13.5% | 4.49 | 953,633 |
| 2025-10-31 | 3,769,098 | -5.6% | 3.34 | 1,127,221 |
| 2025-10-15 | 3,993,922 | +13.9% | 3.48 | 1,146,101 |
| 2025-09-30 | 3,507,540 | -5.7% | 3.36 | 1,043,702 |
import finzdata as yf
yf.Ticker("ALNY").short_interest # every report since 2017
yf.Client().short_interest(["ALNY"], start="2018-01-01")Healthcare short interest · ALNY price history · Who owns ALNY · All short interest