FSLY
Fastly, Inc. Class A Common Stock
stockNASDAQ
At CloseOct 2, 2026 3:59:59 PM EDT
25.80USD-2.236%(-0.59)3,634,888
Pre-marketOct 2, 2026 9:25:30 AM EDT
26.80USD+1.554%(+0.41)
After-hoursOct 2, 2026 4:59:30 PM EDT
25.73USD-0.271%(-0.07)
As of 2026-09-15, there were 21,565,154 shares short with a short interest of 14.84%.
FSLY Short Interest - Official
Short Interest
FSLY Short Position Change - Official
Short Position Change
FSLY 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 | 14.84 | 21,565,154 | 3.95 | +1,351,373 | +6.69 | 159,300,000 | 145,295,069 |
| 2026-08-31 | 13.91 | 20,213,781 | 4.36 | -1,224,080 | -5.71 | 159,300,000 | 145,295,069 |
| 2026-08-14 | 14.75 | 21,437,861 | 2.61 | -1,157,043 | -5.12 | 159,300,000 | 145,295,069 |
| 2026-07-31 | 15.55 | 22,594,904 | 4.48 | -2,936,788 | -11.50 | 156,500,000 | 145,295,069 |
| 2026-07-15 | 17.57 | 25,531,692 | 6.36 | +176,740 | +0.70 | 156,500,000 | 145,276,133 |
| 2026-06-30 | 17.45 | 25,354,952 | 4.41 | +6,683,700 | +35.80 | 156,500,000 | 145,276,446 |
| 2026-06-15 | 12.86 | 18,671,252 | 2.38 | -2,590,053 | -12.18 | 156,500,000 | 145,199,917 |
| 2026-05-15 | 14.86 | 21,261,305 | 1.48 | +2,319,143 | +12.24 | 156,500,000 | 143,037,400 |
| 2026-04-30 | 13.60 | 18,942,162 | 2.27 | -664,302 | -3.39 | 156,367,942 | 139,243,788 |
| 2026-04-15 | 14.08 | 19,606,464 | 1.15 | +1,252,432 | +6.82 | 151,800,000 | 139,243,788 |
| 2026-03-31 | 13.18 | 18,354,032 | 1.46 | +509,866 | +2.86 | 151,800,000 | 139,243,788 |
| 2026-03-13 | 12.82 | 17,844,166 | 1.38 | +1,801,748 | +11.23 | 151,800,000 | 139,243,788 |
| 2026-02-27 | 11.52 | 16,042,418 | 1.09 | -1,047,181 | -6.13 | 149,400,000 | 139,243,788 |
| 2026-02-13 | 12.27 | 17,089,599 | 1.00 | +3,187,745 | +22.93 | 149,400,000 | 139,243,788 |
| 2026-01-30 | 9.98 | 13,901,854 | 3.87 | -651,756 | -4.48 | 149,400,000 | 139,243,788 |
| 2026-01-15 | 10.45 | 14,553,610 | 4.53 | +1,843,013 | +14.50 | 149,400,000 | 139,243,788 |
| 2025-12-31 | 9.13 | 12,710,597 | 5.09 | +191,493 | +1.53 | 149,400,000 | 139,243,788 |
| 2025-12-15 | 8.99 | 12,519,104 | 1.88 | +3,073,956 | +32.55 | 149,400,000 | 139,204,944 |
| 2025-11-28 | 6.79 | 9,445,148 | 2.34 | -539,678 | -5.40 | 149,400,000 | 139,104,846 |
| 2025-11-14 | 7.18 | 9,984,826 | 1.50 | -698,828 | -6.54 | 149,400,000 | 138,998,772 |
| 2025-10-31 | 7.81 | 10,683,654 | 5.36 | +278,944 | +2.68 | 147,400,000 | 136,738,558 |
| 2025-10-15 | 7.61 | 10,404,710 | 3.18 | -673,632 | -6.08 | 147,400,000 | 136,710,552 |
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.