REGN
Regeneron Pharmaceuticals Inc
stockNASDAQ
Market OpenOct 29, 2026 9:42:45 AM EDT
826.89USD+1.675%(+13.62)53,675
Pre-marketOct 29, 2026 9:25:30 AM EDT
827.20USD+1.713%(+13.93)
As of 2026-10-15, there were 2,134,934 shares short with a short interest of 2.16%.
REGN Short Interest - Official
REGN Short Position Change - Official
REGN Short Interest - Official
| Settlement Date1 | Short Interest % | Short Position | Days to Cover2 | Short Position Change | Short Position Change % | Shares Out | Shares Float |
|---|---|---|---|---|---|---|---|
| 2026-10-15 | 2.16 | 2,134,934 | 3.18 | -15,369 | -0.71 | 102,954,988 | 99,067,402 |
| 2026-09-30 | 2.13 | 2,150,303 | 2.49 | -376,143 | -14.89 | 102,954,988 | 100,936,525 |
| 2026-09-15 | 2.50 | 2,526,446 | 4.42 | -25,583 | -1.00 | 102,954,988 | 100,936,525 |
| 2026-08-31 | 2.53 | 2,552,029 | 3.85 | +155,877 | +6.51 | 102,954,988 | 100,936,525 |
| 2026-08-14 | 2.37 | 2,396,152 | 3.15 | -989,689 | -29.23 | 102,954,988 | 100,936,525 |
| 2026-07-31 | 3.35 | 3,385,841 | 3.94 | -115,362 | -3.29 | 102,954,988 | 100,936,525 |
| 2026-07-15 | 3.47 | 3,501,203 | 4.72 | +6,783 | +0.19 | 104,839,032 | 100,877,288 |
| 2026-06-30 | 3.46 | 3,494,420 | 2.91 | +190,091 | +5.75 | 104,839,032 | 100,877,081 |
| 2026-06-15 | 3.28 | 3,304,329 | 3.41 | +523,520 | +18.83 | 104,839,032 | 100,877,081 |
| 2026-05-15 | 2.76 | 2,780,809 | 3.64 | -489,532 | -14.97 | 104,839,032 | 100,913,242 |
| 2026-04-30 | 3.32 | 3,270,341 | 4.06 | +428,561 | +15.08 | 104,839,032 | 98,523,187 |
| 2026-04-15 | 2.88 | 2,841,780 | 4.36 | +293,469 | +11.52 | 105,719,806 | 98,523,187 |
| 2026-03-31 | 2.59 | 2,548,311 | 4.22 | +96,813 | +3.95 | 105,719,806 | 98,523,187 |
| 2026-03-13 | 2.49 | 2,451,498 | 4.18 | +164,748 | +7.20 | 105,719,806 | 98,523,187 |
| 2026-02-27 | 2.32 | 2,286,750 | 3.77 | +234,753 | +11.44 | 105,719,806 | 98,523,187 |
| 2026-02-13 | 2.08 | 2,051,997 | 2.49 | -124,533 | -5.72 | 105,719,806 | 98,523,187 |
| 2026-01-30 | 2.21 | 2,176,530 | 2.34 | -112,684 | -4.92 | 105,099,464 | 98,523,187 |
| 2026-01-15 | 2.32 | 2,289,214 | 2.56 | -194,877 | -7.85 | 105,099,464 | 98,523,187 |
| 2025-12-31 | 2.52 | 2,484,091 | 3.30 | -254,022 | -9.28 | 105,099,464 | 98,523,187 |
| 2025-12-15 | 2.78 | 2,738,113 | 2.81 | -410,317 | -13.03 | 105,099,464 | 98,523,187 |
| 2025-11-28 | 3.19 | 3,148,430 | 2.44 | +304,165 | +10.69 | 105,099,464 | 98,557,045 |
| 2025-11-14 | 2.89 | 2,844,265 | 2.96 | +50,806 | +1.82 | 105,099,464 | 98,562,175 |
| 2025-10-31 | 2.88 | 2,793,459 | 2.75 | -133,710 | -4.57 | 105,099,464 | 97,046,806 |
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.