ShortInterestHistory.com

FBIO Short Interest History

Fortress Biotech, Inc. Common | FBIO | Nasdaq | Latest report: February 27, 2026

Current Short Interest4.5M
Prior Short Interest4.3M
Change Shares174.2K
Change %+4.0%
Average Daily Volume1.3M
Days to Cover3.38

Fortress Biotech, Inc. Common (FBIO) had reported short interest of 4,484,322 shares at the latest settlement date of February 27, 2026, compared with 4,310,143 shares in the prior report. That was a change of 174.2K shares, or +4.0%. Based on reported average daily volume of 1.3M, the latest days-to-cover reading was 3.38.

This page tracks 111 reported short interest entries for FBIO from June 15, 2021 through February 27, 2026. Over that period, reported short interest ranged from 91.6K to 4.6M shares.

Reported short interest can change for many reasons, including shifts in sentiment, trading activity, and company-specific events.

Download last 6 months as CSV

Short Interest Over Time

Days to Cover Over Time

Extreme edge-case readings may reflect unusually low reported average volume.

Short Interest History for FBIO

Settlement DateShort InterestPrior Short InterestChange SharesChange %Average Daily VolumeDays to Cover
February 27, 20264,484,3224,310,143174.2K+4.0%1.3M3.38
February 13, 20264,310,1434,583,530-273.4K-6.0%559.0K7.71
January 30, 20264,583,5304,491,24192.3K+2.0%565.8K8.1
January 15, 20264,491,2414,045,115446.1K+11.0%1.9M2.38
December 31, 20254,045,1153,624,744420.4K+11.6%568.0K7.12
December 15, 20253,624,7443,706,394-81.7K-2.2%496.1K7.31
November 28, 20253,706,3943,976,655-270.3K-6.8%302.3K12.26
November 14, 20253,976,6553,505,973470.7K+13.4%360.5K11.03
October 31, 20253,505,9733,378,367127.6K+3.8%436.6K8.03
October 15, 20253,378,3673,750,911-372.5K-9.9%1.5M2.22
September 15, 20253,790,8773,027,305763.6K+25.2%1.9M1.98
August 29, 20253,027,3052,791,229236.1K+8.5%628.7K4.82
August 15, 20252,791,2292,983,698-192.5K-6.5%235.1K11.87
July 31, 20252,983,6983,128,751-145.1K-4.6%180.5K16.53
July 15, 20253,128,7513,196,641-67.9K-2.1%243.1K12.87
June 30, 20253,196,6413,294,028-97.4K-3.0%193.0K16.56
June 13, 20253,294,0283,362,646-68.6K-2.0%266.9K12.34
May 30, 20253,362,6463,509,189-146.5K-4.2%210.6K15.97
May 15, 20253,509,1893,687,086-177.9K-4.8%139.0K25.24
April 30, 20253,687,0863,632,74654.3K+1.5%154.5K23.86
April 15, 20253,632,7463,633,082-336-0.0%205.8K17.66
March 31, 20253,633,0823,773,541-140.5K-3.7%296.8K12.24
February 28, 20253,677,3073,694,505-17.2K-0.5%265.6K13.84
February 14, 20253,694,5053,580,429114.1K+3.2%305.4K12.1
January 31, 20253,580,4293,476,154104.3K+3.0%270.2K13.25
January 15, 20253,476,1543,402,99873.2K+2.1%619.9K5.61
December 31, 20243,402,9983,106,786296.2K+9.5%745.6K4.56
December 13, 20243,106,7862,816,322290.5K+10.3%825.7K3.76
November 29, 20242,816,3222,915,257-98.9K-3.4%514.2K5.48
November 15, 20242,915,2572,622,535292.7K+11.2%617.3K4.72
October 31, 20242,622,5352,572,27750.3K+1.9%576.2K4.55
October 15, 20242,572,2772,350,733221.5K+9.4%537.9K4.78
September 30, 20242,350,7332,166,969183.8K+8.5%1.1M2.07
September 13, 20242,166,9691,722,484444.5K+25.8%252.2K8.59
August 30, 20241,722,4841,611,476111.0K+6.9%189.5K9.09
August 15, 20241,611,4761,588,32423.2K+1.5%299.7K5.38
July 31, 20241,588,3241,475,762112.6K+7.6%371.3K4.28
July 15, 20241,475,7621,657,995-182.2K-11.0%180.6K8.17
June 28, 20241,657,9951,535,991122.0K+7.9%251.7K6.59
June 14, 20241,535,9911,614,110-78.1K-4.8%155.2K9.89
May 31, 20241,614,1101,667,562-53.5K-3.2%180.9K8.92
May 15, 20241,667,5621,753,091-85.5K-4.9%128.0K13.03
April 30, 20241,753,0911,821,600-68.5K-3.8%183.4K9.56
April 15, 20241,821,6001,883,627-62.0K-3.3%241.1K7.55
March 28, 20241,883,6271,730,763152.9K+8.8%282.0K6.68
March 15, 20241,730,7631,540,410190.4K+12.4%332.5K5.2
February 29, 20241,540,4101,640,665-100.3K-6.1%335.7K4.59
February 15, 20241,640,6651,492,831147.8K+9.9%322.5K5.09
January 31, 20241,492,8311,290,431202.4K+15.7%365.6K4.08
December 29, 20231,130,999907,385223.6K+24.6%846.7K1.34
December 15, 2023907,385617,963289.4K+46.8%612.6K1.48
November 30, 2023617,963259,768358.2K+137.9%2.0M1
November 15, 2023259,768169,87789.9K+52.9%323.6K1
October 31, 2023169,87791,61478.3K+85.4%85.5K1.99
October 13, 202391,614679,663-588.0K-86.5%65.3K1.4
September 29, 2023679,663715,053-35.4K-5.0%312.9K2.17
September 15, 2023715,053710,9004.2K+0.6%310.8K2.3
August 31, 2023710,900572,815138.1K+24.1%687.7K1.03
August 15, 2023572,815675,661-102.8K-15.2%470.4K1.22
July 31, 2023675,661613,17162.5K+10.2%1.2M1
July 14, 2023613,171540,37572.8K+13.5%487.7K1.26
June 30, 2023540,375478,34862.0K+13.0%414.9K1.3
June 15, 2023478,348865,881-387.5K-44.8%474.5K1.01
May 31, 2023865,881702,923163.0K+23.2%1.4M1
May 15, 2023702,923658,35644.6K+6.8%408.2K1.72
April 28, 2023658,3561,039,374-381.0K-36.7%375.7K1.75
April 14, 20231,039,3741,128,376-89.0K-7.9%500.1K2.08
March 31, 20231,128,376989,200139.2K+14.1%357.4K3.16
March 15, 2023989,200328,825660.4K+200.8%526.0K1.88
February 28, 2023328,825422,007-93.2K-22.1%1.4M1
February 15, 2023422,007438,128-16.1K-3.7%678.4K1
January 31, 2023438,128391,67246.5K+11.9%619.9K1
January 13, 2023391,672804,138-412.5K-51.3%417.5K1
December 30, 2022804,138737,36166.8K+9.1%869.4K1
December 15, 2022737,361664,68072.7K+10.9%207.0K3.56
November 30, 2022664,680632,60732.1K+5.1%217.0K3.06
November 15, 2022632,607605,24427.4K+4.5%133.6K4.74
October 31, 2022605,244591,34513.9K+2.4%263.8K2.29
October 14, 2022591,345747,204-155.9K-20.9%139.5K4.24
September 30, 2022747,204623,440123.8K+19.9%246.2K3.03
September 15, 2022623,440622,798642+0.1%118.4K5.27
August 31, 2022622,798671,643-48.8K-7.3%162.4K3.84
August 15, 2022671,643687,246-15.6K-2.3%391.2K1.72
July 29, 2022687,246748,129-60.9K-8.1%298.9K2.3
July 15, 2022748,1291,014,372-266.2K-26.2%957.7K1
June 30, 20221,014,3723,335,886-2.3M-69.6%1.2M1
June 15, 20223,335,8863,057,695278.2K+9.1%518.5K6.43
May 31, 20223,057,6952,966,70391.0K+3.1%461.4K6.63
May 13, 20222,966,7032,622,951343.8K+13.1%659.5K4.5
April 29, 20222,622,9511,841,454781.5K+42.4%762.1K3.44
April 14, 20221,841,4541,598,937242.5K+15.2%768.9K2.39
March 31, 20221,598,9371,559,61639.3K+2.5%521.3K3.07
March 15, 20221,559,6161,307,339252.3K+19.3%485.0K3.22
February 28, 20221,307,3391,106,727200.6K+18.1%636.7K2.05
February 15, 20221,106,7271,021,21685.5K+8.4%343.5K3.22
January 31, 20221,021,216873,004148.2K+17.0%490.2K2.08
January 14, 2022873,004856,65016.4K+1.9%336.9K2.59
December 31, 2021856,650735,713120.9K+16.4%563.3K1.52
December 15, 2021735,713948,951-213.2K-22.5%411.4K1.79
November 30, 2021948,951855,81993.1K+10.9%389.1K2.44
November 15, 2021855,8191,049,037-193.2K-18.4%399.3K2.14
October 29, 20211,049,0371,080,054-31.0K-2.9%323.7K3.24
October 15, 20211,080,054772,461307.6K+39.8%635.5K1.7
September 30, 2021772,461927,253-154.8K-16.7%1.5M1
September 15, 2021927,253790,697136.6K+17.3%228.3K4.06
August 31, 2021790,697969,373-178.7K-18.4%379.5K2.08
August 13, 2021969,373948,80320.6K+2.2%283.9K3.41
July 30, 2021948,8031,006,791-58.0K-5.8%331.4K2.86
July 15, 20211,006,7911,220,278-213.5K-17.5%398.1K2.53
June 30, 20211,220,2781,115,902104.4K+9.3%688.9K1.77
June 15, 20211,115,9021,129,050-13.1K-1.2%941.6K1.19

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