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BridgeBio Pharma (BBIO) Short Interest Ratio & Short Volume

BridgeBio Pharma logo
$70.73 -0.09 (-0.13%)
Closing price 10/29/2026 04:00 PM Eastern
Extended Trading
$69.98 -0.75 (-1.06%)
As of 10/29/2026 07:30 PM Eastern
Extended trading is trading that happens on electronic markets outside of regular trading hours. This is a fair market value extended hours price provided by Massive. Learn more.
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BridgeBio Pharma Short Interest Overview

As of October 15, 2026, BridgeBio Pharma (BBIO) had a short interest of 20.00 million shares sold short, representing 11.93% of the public float. This marks a 1.66% increase in short interest since the prior report. The short interest ratio (days to cover) is 7.7, meaning it would take 7.7 days of the average trading volume of 2.58 million shares to cover all short positions.

Current Short Interest
19,997,556 shares
Previous Short Interest
19,671,292 shares
Change Vs. Previous Report
1.66%
Dollar Volume Sold Short
$1.34 billion
Short Interest Ratio
7.7 Days to Cover
Last Record Date
October 15, 2026
Outstanding Shares
195,490,000 shares
Short Percent of Float
11.93%
Today's Trading Volume
4,933,526 shares
Average Trading Volume
2,583,143 shares
Today's Volume Vs. Average
191%
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Short Interest ChartDays to Cover ChartShort Percent of Float Chart

BBIO Short Interest Over Time

BBIO Days to Cover Over Time

BBIO Percentage of Float Shorted Over Time

BridgeBio Pharma Tesla Short Interest History & Recent Changes

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Report DateTotal Shares Sold ShortDollar Volume Sold ShortChange from Previous ReportPercentage of Float ShortedDays to CoverPrice on Report Date
10/15/202619,997,556 shares $1.34 billion +1.7%11.9%7.68 $67.13
9/30/202619,671,292 shares $1.29 billion -8.7%11.7%5.85 $65.80
9/15/202621,549,349 shares $1.47 billion -1.4%12.9%10.54 $68.39
8/31/202621,845,899 shares $1.67 billion -6.3%13.0%11.18 $76.59
8/14/202623,324,059 shares $1.86 billion -0.1%13.9%10.79 $79.86
7/31/202623,342,623 shares $1.87 billion -9.4%13.9%11.5 $80.09
7/15/202625,750,649 shares $2.13 billion +6.8%15.3%5.38 $82.66
6/30/202624,102,938 shares $1.80 billion -5.2%14.3%4.51 $74.48
6/15/202625,415,150 shares $1.73 billion +4.2%15.1%8.57 $68.00
5/29/202624,391,359 shares $1.62 billion +0.9%14.5%9.6 $66.26
5/15/202624,163,037 shares $1.60 billion +0.6%14.4%8.73 $66.13
4/30/202624,026,982 shares $1.71 billion +6.0%14.3%7.59 $71.11
4/15/202622,676,856 shares $1.76 billion -3.0%13.5%13.68 $77.70
3/31/202623,366,752 shares $1.74 billion -0.6%13.9%14.73 $74.26
3/13/202623,505,637 shares $1.63 billion +7.0%14.8%8.95 $69.41
2/27/202621,964,843 shares $1.46 billion +3.8%13.1%6.98 $66.48
2/13/202621,167,249 shares $1.59 billion +5.9%12.6%5.65 $75.25
1/30/202619,980,855 shares $1.54 billion +8.8%12.7%7.14 $77.27
1/15/202618,370,031 shares $1.40 billion +6.7%11.7%5.91 $76.26
12/31/202517,211,114 shares $1.32 billion -8.4%10.9%10.19 $76.49
12/15/202518,793,079 shares $1.40 billion -3.0%11.9%10.18 $74.51
11/28/202519,381,854 shares $1.39 billion -6.3%12.3%8.49 $71.61
11/14/202520,691,850 shares $1.37 billion +5.8%13.1%9.95 $66.39
10/31/202519,566,757 shares $1.23 billion +12.8%12.4%6.54 $62.64
10/15/202517,350,000 shares $982.53 million -0.8%11.1%7.3 $56.63
9/30/202517,490,000 shares $908.43 million -10.0%N/A7.1 $51.94
9/15/202519,440,000 shares $1.00 billion -2.4%N/A7 $51.47
8/31/202519,910,000 shares $1.03 billion -2.8%12.7%7 $51.76
8/15/202520,490,000 shares $1.05 billion +10.6%N/A7.2 $51.32
7/31/202518,520,000 shares $875.44 million -4.9%11.8%6.2 $47.27
7/15/202519,480,000 shares $914.98 million -10.8%N/A6.4 $46.97
6/30/202521,830,000 shares $942.62 million +3.4%14.1%7 $43.18
6/15/202521,120,000 shares $840.15 million -4.0%13.6%7.1 $39.78
5/31/202521,990,000 shares $756.24 million -1.8%15.3%7.6 $34.39
5/15/202522,400,000 shares $755.78 million +1.0%15.6%7.2 $33.74
4/30/202522,180,000 shares $850.82 million -0.6%N/A7 $38.36
4/15/202522,310,000 shares $763.89 million +2.8%15.6%7.7 $34.24
3/31/202521,710,000 shares $750.51 million -0.2%15.2%6.9 $34.57
3/15/202521,760,000 shares $717.43 million -1.8%15.2%7.4 $32.97
2/28/202522,160,000 shares $773.38 million +9.8%14.9%8 $34.90
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2/15/202520,180,000 shares $704.28 million +7.5%14.1%7.2 $34.90
1/31/202518,780,000 shares $642.46 million -7.9%12.7%7.6 $34.21
1/15/202520,380,000 shares $713.30 million +5.6%13.8%9 $35.00
12/31/202419,300,000 shares $529.59 million +12.7%13.1%9.9 $27.44
12/15/202417,120,000 shares $470.63 million +0.7%11.6%8.4 $27.49
11/30/202417,000,000 shares $460.53 million -1.1%11.5%8.1 $27.09
11/15/202417,190,000 shares $407.75 million -0.1%11.7%7.3 $23.72
10/31/202417,200,000 shares $402.65 million -3.3%11.7%8.8 $23.41
10/15/202417,780,000 shares $451.26 million -4.6%12.1%9.3 $25.38
9/30/202418,630,000 shares $474.32 million -5.0%12.7%9.9 $25.46
9/15/202419,610,000 shares $513.39 million +10.7%13.4%8.9 $26.18
8/31/202417,710,000 shares $493.22 million -1.7%12.6%8.6 $27.85
8/15/202418,020,000 shares $449.78 million -9.7%12.8%9.9 $24.96
7/31/202419,960,000 shares $517.96 million -5.2%14.2%10.6 $25.95
7/15/202421,050,000 shares $586.03 million +5.3%15.0%10.9 $27.84
6/30/202420,000,000 shares $506.60 million +20.1%14.2%10.3 $25.33
6/15/202416,660,000 shares $464.15 million +0.2%11.8%9.1 $27.86
5/31/202416,630,000 shares $465.81 million +5.4%11.9%10.4 $28.01
5/15/202415,780,000 shares $472.93 million -2.8%11.3%9.6 $29.97
4/30/202416,230,000 shares $415.81 million +7.7%11.5%9.7 $25.62
4/15/202415,070,000 shares $388.35 million +5.5%10.9%8.9 $25.77
3/31/202414,280,000 shares $441.54 million +6.5%10.3%8.3 $30.92
3/15/202413,410,000 shares $369.58 million -1.7%9.8%7.3 $27.56
2/29/202413,640,000 shares $465.81 million -2.6%10.0%7.1 $34.15
2/15/202414,000,000 shares $549.22 million -1.5%10.8%7.9 $39.23
1/31/202414,210,000 shares $487.26 million -11.9%11.1%8.3 $34.29
1/15/202416,120,000 shares $623.84 million -5.6%12.6%9.7 $38.70
12/31/202317,080,000 shares $689.52 million -0.1%13.3%11 $40.37
12/15/202317,090,000 shares $672.83 million +7.1%13.3%11.4 $39.37
11/30/202315,960,000 shares $458.21 million -2.0%12.8%11.2 $28.71
11/15/202316,280,000 shares $480.59 million +1.9%13.0%10.8 $29.52
10/31/202315,970,000 shares $415.86 million -0.6%12.7%9.9 $26.04
10/15/202316,060,000 shares $418.84 million +4.8%13.7%9 $26.08
9/30/202315,320,000 shares $403.99 million -4.1%13.1%5.1 $26.37
9/15/202315,980,000 shares $465.50 million +4.2%13.6%5.2 $29.13
8/31/202315,330,000 shares $458.52 million -2.1%13.1%4.9 $29.91
8/15/202315,660,000 shares $477.00 million +8.5%13.4%5.1 $30.46
7/31/202314,430,000 shares $505.19 million -2.6%12.3%4.7 $35.01
7/15/202314,820,000 shares $270.02 million -0.6%12.8%5 $18.22
6/30/202314,910,000 shares $256.45 million +13.2%12.8%8.1 $17.20
6/15/202313,170,000 shares $204.40 million -2.5%11.3%6 $15.52
5/31/202313,510,000 shares $185.36 million +1.7%11.7%5.9 $13.72
5/15/202313,290,000 shares $197.22 million -6.4%11.5%4.2 $14.84
4/30/202314,200,000 shares $206.18 million -4.6%12.2%4.4 $14.52
4/15/202314,890,000 shares $219.48 million -1.8%12.8%4.7 $14.74
3/31/202315,160,000 shares $251.35 million -13.5%13.4%4.9 $16.58
3/15/202317,520,000 shares $249.66 million +4.6%15.5%6.3 $14.25
2/28/202316,750,000 shares $191.29 million +2.5%15.7%7.3 $11.42
2/15/202316,350,000 shares $199.47 million -12.3%15.3%11.7 $12.20
1/31/202318,650,000 shares $173.07 million +1.3%17.5%14.1 $9.28
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1/15/202318,410,000 shares $161.09 million -3.1%17.3%14.7 $8.75
12/30/202219,000,000 shares $144.78 million -1.1%17.9%14.7 $7.62
12/15/202219,210,000 shares $171.16 million -4.5%18.1%14.8 $8.91
11/30/202220,110,000 shares $188.43 million -3.6%18.9%13.3 $9.37
11/15/202220,860,000 shares $217.99 million -6.5%19.7%13 $10.45
10/31/202222,310,000 shares $232.69 million -3.5%21.1%13.4 $10.43
10/15/202223,120,000 shares $228.43 million +0.6%22.0%11.2 $9.88
9/30/202222,980,000 shares $228.42 million -1.2%21.9%11 $9.94
9/15/202223,250,000 shares $277.61 million +0.6%22.2%10.6 $11.94
8/31/202223,110,000 shares $242.66 million +2.9%22.1%10.5 $10.50
8/15/202222,460,000 shares $259.64 million +1.7%21.4%10.2 $11.56
7/31/202222,080,000 shares $191.21 million +5.7%21.1%9.2 $8.66
7/15/202220,900,000 shares $187.89 million -0.3%20.0%10 $8.99
6/30/202220,970,000 shares $190.41 million -0.2%20.1%9.8 $9.08
6/15/202221,020,000 shares $141.67 million +6.0%20.1%9.8 $6.74
5/31/202219,830,000 shares $135.44 million +0.5%19.2%8.3 $6.83
5/15/202219,740,000 shares $130.68 million +1.8%19.1%7.8 $6.62
4/30/202219,400,000 shares $155.59 million +2.7%18.8%7.8 $8.02
4/15/202218,900,000 shares $207.52 million -2.1%18.3%7.3 $10.98
3/31/202219,300,000 shares $195.90 million +11.8%18.7%7 $10.15
3/15/202217,270,000 shares $146.97 million +0.3%16.8%3.6 $8.51
2/28/202217,220,000 shares $134.32 million +10.0%16.7%4 $7.80
2/15/202215,650,000 shares $139.44 million +0.5%15.2%3.8 $8.91
1/31/202215,580,000 shares $153.77 million +10.1%15.1%4.1 $9.87
1/15/202214,150,000 shares $180.41 million -2.8%13.7%4.1 $12.75
12/31/202114,550,000 shares $242.69 million +18.4%14.1%4.6 $16.68
12/15/202112,290,000 shares $476.61 million +6.0%11.9%9.1 $38.78
11/30/202111,590,000 shares $469.40 million -1.0%11.2%13.9 $40.50
11/15/202111,710,000 shares $563.95 million -1.5%11.3%14.6 $48.16

BBIO Short Interest - Frequently Asked Questions

Short interest is the volume of BridgeBio Pharma shares that have been sold short but have not yet been closed out or covered. As of October 15th, investors have sold 19,997,556 shares of BBIO short. 11.93% of BridgeBio Pharma's shares are currently sold short. Learn More on BridgeBio Pharma's current short interest.

The short interest ratio, also known as the "days to cover ratio", is calculated by dividing the number of shares of a stock sold short divided by its average trading volume. A short interest ratio ranging between 1 and 4 generally indicates strong positive sentiment about a stock and a lack of short sellers. A short interest ratio of 10 or greater indicates strong pessimism about a stock. BBIO shares currently have a short interest ratio of 7.7. Learn More on BridgeBio Pharma's short interest ratio.

Companies that have a short interest as a percentage of float below 10% indicates positive investor sentiment and few short sellers. Stocks with a short interest percentage above 10% is considered high, suggesting some investors are pessimistic about the stock. Companies with a short interest percentage of 20% or more indicates widespread negative sentiment. 11.93% of BridgeBio Pharma's floating shares are currently sold short.

BridgeBio Pharma saw a increase in short interest in October. As of October 15th, there was short interest totaling 19,997,556 shares, an increase of 1.7% from the previous total of 19,671,292 shares. Changes in short volume can be used to identify positive and negative investor sentiment. Investors that short sell a stock are betting that its price will decline in the future. An increase in short sale volume suggests bearish (negative) sentiment among investors. A decrease on short sale volume suggests bullish (positive) sentiment.

11.93% of BridgeBio Pharma's shares are currently sold short. Here is how the short interest of companies in the industry of "biotechnology" compare to BridgeBio Pharma: Revolution Medicines, Inc. (6.53%), Biogen Inc. (3.73%), Alnylam Pharmaceuticals, Inc. (4.95%), Genmab A/S Sponsored ADR (1.07%), Roivant Sciences Ltd. (6.12%), United Therapeutics Corporation (6.27%), Incyte Corporation (5.90%), BioNTech SE Sponsored ADR (1.11%), Insmed, Inc. (6.30%), Exelixis, Inc. (11.32%),

As of the most recent reporting period, the following stocks had the largest short interest positions: SPDR S&P 500 ETF Trust ($71.77 billion), Invesco QQQ ($59.70 billion), iShares Russell 2000 ETF ($23.54 billion), Medtronic PLC ($13.33 billion), SPDR S&P Biotech ETF ($10.47 billion), iShares iBoxx $ High Yield Corporate Bond ETF ($10.36 billion), Nebius Group N.V. ($8.98 billion), iShares 20+ Year Treasury Bond ETF ($8.92 billion), iShares iBoxx $ Investment Grade Corporate Bond ETF ($8.10 billion), and iShares Semiconductor ETF ($7.74 billion). View all of the most shorted stocks.

Short selling BBIO is an investing strategy that aims to generate trading profit from BridgeBio Pharma as its price is falling. BBIO shares are trading down $0.20 today. To short a stock, an investor borrows shares, sells them and buys the shares back on the public market later to return it to the lender. Short sellers are betting that a stock will decline in price. If the stock does drop after selling, the short seller buys it back at a lower price and returns it to the lender. The difference between the sell price and the buy price is the trader's profit.

A short squeeze for BridgeBio Pharma occurs when it has a large amount of short interest and its stock appreciates in price. This forces short sellers to cover their short interest positions by buying actual shares of BBIO, which in turn drives the price of the stock up even further.

Short interest is typically published by a stock exchange once per month. However, NASDAQ publishes a report for U.S. stocks, including BBIO, twice per month. The most recent reporting period available is October, 15 2026.

Understanding short interest metrics can help you assess how traders are positioning around a stock like BBIO:

  • Shares Sold Short: The total number of shares that have been sold by short sellers but have not yet been covered or closed out. A high number may indicate bearish sentiment.
  • Short Float: The percentage of a company’s publicly available shares (or "float") that are sold short. A higher short float suggests a greater portion of the stock is being bet against.
  • Days to Cover (Short Interest Ratio): This estimates how many days it would take short sellers to cover their positions, based on average daily trading volume. Higher values can signal potential for a short squeeze if buying pressure increases.

These metrics are often used by traders to gauge sentiment, volatility risk, and the potential for price movements based on short covering activity.


Related Companies
Short Interest Tools

Short interest data for NASDAQ:BBIO is sourced from the Financial Industry Regulatory Authority (FINRA), with the most recent report published on 10/26/2026. FINRA publishes updated short interest twice a month.
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