RPID
Rapid Micro Biosystems, Inc. Class A Common Stock
stockNASDAQ
At CloseOct 2, 2026 3:59:30 PM EDT
0.9005USD-2.226%(-0.0205)329,276
After-hoursOct 2, 2026 4:31:30 PM EDT
0.89USD-1.166%(-0.01)
As of 2026-09-15, there were 940,376 shares short with a short interest of 3.56%.
RPID Short Interest - Official
Short Interest
RPID Short Position Change - Official
Short Position Change
RPID 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 | 3.56 | 940,376 | 3.73 | +70,955 | +8.16 | 50,159,556 | 26,437,404 |
| 2026-08-31 | 3.29 | 869,421 | 4.48 | +25,600 | +3.03 | 50,159,556 | 26,437,404 |
| 2026-08-14 | 3.19 | 843,821 | 2.99 | +18,056 | +2.19 | 50,159,556 | 26,437,404 |
| 2026-07-31 | 3.12 | 825,765 | 5.05 | -16,571 | -1.97 | 49,821,809 | 26,442,298 |
| 2026-07-15 | 3.40 | 842,336 | 3.19 | +103,867 | +14.07 | 49,821,809 | 24,787,355 |
| 2026-06-30 | 2.98 | 738,469 | 3.70 | +124,472 | +20.27 | 49,821,809 | 24,787,355 |
| 2026-06-15 | 2.49 | 613,997 | 4.86 | -45,828 | -6.95 | 49,821,809 | 24,691,770 |
| 2026-05-15 | 2.87 | 659,825 | 5.16 | -149,071 | -18.43 | 45,767,040 | 22,999,409 |
| 2026-04-30 | 4.14 | 808,896 | 4.18 | +265,030 | +48.73 | 45,767,040 | 19,522,756 |
| 2026-04-15 | 2.79 | 543,866 | 2.94 | +166,364 | +44.07 | 45,767,040 | 19,522,756 |
| 2026-03-31 | 1.93 | 377,502 | 1.36 | +60,057 | +18.92 | 45,462,993 | 19,522,756 |
| 2026-03-13 | 1.63 | 317,445 | 1.35 | +100,565 | +46.37 | 44,322,555 | 19,522,756 |
| 2026-02-27 | 1.11 | 216,880 | 2.16 | +39,314 | +22.14 | 44,322,555 | 19,522,756 |
| 2026-02-13 | 0.91 | 177,566 | 1.00 | +11,493 | +6.92 | 44,322,555 | 19,522,756 |
| 2026-01-30 | 0.85 | 166,073 | 1.00 | -12,483 | -6.99 | 44,322,555 | 19,522,756 |
| 2026-01-15 | 0.91 | 178,556 | 1.00 | -351 | -0.20 | 44,322,555 | 19,522,756 |
| 2025-12-31 | 0.92 | 178,907 | 1.22 | +17,598 | +10.91 | 44,322,555 | 19,522,756 |
| 2025-12-15 | 0.83 | 161,309 | 1.52 | -77,472 | -32.44 | 44,322,555 | 19,522,756 |
| 2025-11-28 | 1.23 | 238,781 | 2.35 | -62,706 | -20.80 | 44,322,555 | 19,485,525 |
| 2025-11-14 | 1.53 | 301,487 | 1.87 | -9,193 | -2.96 | 44,322,555 | 19,659,766 |
| 2025-10-31 | 1.61 | 310,680 | 3.78 | -12,057 | -3.74 | 44,210,328 | 19,333,619 |
| 2025-10-15 | 1.67 | 322,737 | 3.47 | -55,759 | -14.73 | 44,210,328 | 19,338,040 |
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.