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Mirum Pharmaceuticals (MIRM) Short Interest Ratio & Short Volume

Mirum Pharmaceuticals logo
$98.64 +1.31 (+1.34%)
As of 02:04 PM Eastern
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Mirum Pharmaceuticals Short Interest Overview

As of May 15, 2026, Mirum Pharmaceuticals (MIRM) had a short interest of 8.20 million shares sold short, representing 15.70% of the public float. This marks a -2.58% decrease in short interest since the prior report. The short interest ratio (days to cover) is 4.8, meaning it would take 4.8 days of the average trading volume of 907,854 shares to cover all short positions.

Current Short Interest
8,196,668 shares
Previous Short Interest
8,413,814 shares
Change Vs. Previous Month
-2.58%
Dollar Volume Sold Short
$837.54 million
Short Interest Ratio
4.8 Days to Cover
Last Record Date
May 15, 2026
Outstanding Shares
60,980,000 shares
Short Percent of Float
15.70%
Today's Trading Volume
164,572 shares
Average Trading Volume
907,854 shares
Today's Volume Vs. Average
18%
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Short Interest ChartDays to Cover ChartShort Percent of Float Chart

MIRM Short Interest Over Time

MIRM Days to Cover Over Time

MIRM Percentage of Float Shorted Over Time

Mirum Pharmaceuticals 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
5/15/20268,196,668 shares $837.54 million -2.6%15.7%4.83 $102.18
4/30/20268,413,814 shares $818.75 million +2.4%17.9%14.67 $97.31
4/15/20268,213,781 shares $791.81 million +2.0%15.9%12.54 $96.40
3/31/20268,050,414 shares $743.70 million +7.9%15.6%6.84 $92.38
3/13/20267,460,121 shares $676.33 million -2.1%16.0%9.06 $90.66
2/27/20267,623,019 shares $703.53 million -5.2%16.4%9.75 $92.29
2/13/20268,040,628 shares $828.99 million +3.2%20.3%12.73 $103.10
1/30/20267,795,041 shares $804.60 million +2.7%19.7%9.55 $103.22
1/15/20267,589,951 shares $700.70 million -9.3%19.1%8.46 $92.32
12/31/20258,363,319 shares $660.62 million +13.4%21.1%9.09 $78.99
12/15/20257,374,120 shares $472.68 million -1.2%18.6%10.67 $64.10
11/28/20257,464,991 shares $545.47 million -2.6%18.8%18.19 $73.07
11/14/20257,661,323 shares $547.32 million +9.0%19.3%9.91 $71.44
10/31/20257,027,185 shares $510.52 million -4.9%17.7%16.75 $72.65
10/15/20257,390,000 shares $563.04 million +0.3%19.1%10.1 $76.19
9/30/20257,370,000 shares $540.29 million -1.7%N/A10.3 $73.31
9/15/20257,500,000 shares $556.43 million +9.3%N/A11.4 $74.19
8/31/20256,860,000 shares $506.75 million -1.0%15.9%11.3 $73.87
8/15/20256,930,000 shares $470.75 million +4.5%N/A12.8 $67.93
7/31/20256,630,000 shares $342.64 million +0.8%15.4%14.2 $51.68
7/15/20256,580,000 shares $342.03 million +1.1%N/A15.8 $51.98
6/30/20256,510,000 shares $331.29 million +4.7%15.3%14.9 $50.89
6/15/20256,220,000 shares $308.70 million +2.6%14.7%14.7 $49.63
5/31/20256,060,000 shares $268.70 million -3.7%16.4%14.1 $44.34
5/15/20256,290,000 shares $284.81 million +1.0%17.0%13.6 $45.28
4/30/20256,230,000 shares $270.69 million -0.8%N/A12.4 $43.45
4/15/20256,280,000 shares $242.60 million -4.6%17.0%12.3 $38.63
3/31/20256,580,000 shares $296.43 million +4.8%17.8%12.2 $45.05
3/15/20256,280,000 shares $278.08 million -5.3%17.0%12.2 $44.28
2/28/20256,630,000 shares $315.39 million +0.3%17.9%13.3 $47.57
2/15/20256,610,000 shares $330.76 million +0.6%17.9%14.3 $50.04
1/31/20256,570,000 shares $321.14 million -1.2%N/A14.4 $48.88
1/15/20256,650,000 shares $308.09 million +3.4%N/A16 $46.33
12/31/20246,430,000 shares $265.88 million -6.0%N/A17.5 $41.35
12/15/20246,840,000 shares $290.29 million +1.8%N/A18.3 $42.44
11/30/20246,720,000 shares $310.60 million -3.6%N/A18 $46.22
11/15/20246,970,000 shares $310.17 million +1.8%N/A18.2 $44.50
10/31/20246,850,000 shares $263.45 million -2.1%N/A18.2 $38.46
10/15/20247,000,000 shares $277.97 million -2.2%N/A15.8 $39.71
9/30/20247,160,000 shares $279.24 million +1.6%N/A13.9 $39.00
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9/15/20247,050,000 shares $289.90 million -1.0%N/A11.6 $41.12
8/31/20247,120,000 shares $306.94 million +3.6%N/A9.8 $43.11
8/15/20246,870,000 shares $285.31 million -5.8%N/A8.9 $41.53
7/31/20247,290,000 shares $295.61 million -10.8%N/A9.7 $40.55
7/15/20248,170,000 shares $322.55 million +14.3%N/A11.5 $39.48
6/30/20247,150,000 shares $244.46 million -8.3%N/A11 $34.19
6/15/20247,800,000 shares $202.18 million -12.4%N/A12.8 $25.92
5/31/20248,900,000 shares $213.87 million +1.0%N/A17.5 $24.03
5/15/20248,810,000 shares $220.16 million +3.7%N/A18.5 $24.99
4/30/20248,500,000 shares $213.44 million -0.9%N/A17.4 $25.11
4/15/20248,580,000 shares $205.15 million +5.2%N/A17.2 $23.91
3/31/20248,160,000 shares $204.98 million +0.3%N/A13.9 $25.12
3/15/20248,140,000 shares $217.91 million +6.3%N/A13.5 $26.77
2/29/20247,660,000 shares $219.92 million -1.5%N/A11.9 $28.71
2/15/20247,780,000 shares $225.46 million -0.9%N/A11.9 $28.98
1/31/20247,850,000 shares $207.71 million +8.0%N/A11.6 $26.46
1/15/20247,270,000 shares $198.40 million +0.6%N/A10.8 $27.29
12/31/20237,230,000 shares $213.43 million +4.2%N/A12.1 $29.52
12/15/20236,940,000 shares $242.41 million +12.5%N/A12.3 $34.93
11/30/20236,170,000 shares $197.87 million -3.0%N/A11.2 $32.07
11/15/20236,360,000 shares $193.09 million +4.6%N/A12.2 $30.36
10/31/20236,080,000 shares $166.77 million -2.6%22.6%12.4 $27.43
10/15/20236,240,000 shares $175.47 million +4.9%24.7%12.3 $28.12
9/30/20235,950,000 shares $188.02 million +8.2%23.5%10.2 $31.60
9/15/20235,500,000 shares $180.68 million +8.3%21.8%9.4 $32.85
8/31/20235,080,000 shares $134.26 million +0.6%20.2%9 $26.43
8/15/20235,050,000 shares $129.73 million +24.7%18.7%9.4 $25.69
7/31/20234,050,000 shares $104.33 million +35.0%14.9%7.5 $25.76
7/15/20233,000,000 shares $78.75 million -8.0%11.1%5.7 $26.25
6/30/20233,260,000 shares $84.34 million +10.1%12.1%5.3 $25.87
6/15/20232,960,000 shares $83.15 million +0.7%11.0%5.1 $28.09
5/31/20232,940,000 shares $77.12 million -7.3%11.8%5.6 $26.23
5/15/20233,170,000 shares $82.52 million +1.6%12.7%6.4 $26.03
4/30/20233,120,000 shares $83.77 million +4.4%13.0%6.6 $26.85
4/15/20232,990,000 shares $74.72 million +69.9%12.5%6.3 $24.99
3/31/20231,760,000 shares $42.28 million -10.2%7.2%4.5 $24.02
3/15/20231,960,000 shares $46.31 million +7.1%8.0%6.5 $23.63
2/28/20231,830,000 shares $43.02 million -2.7%7.7%5.7 $23.51
2/15/20231,880,000 shares $42.41 million +14.6%7.9%5.6 $22.56
1/31/20231,640,000 shares $38.51 million +42.6%7.1%4.5 $23.48
1/15/20231,150,000 shares $25.30 million +9.5%4.9%3.2 $22.00
12/30/20221,050,000 shares $20.48 million -13.2%4.5%2.8 $19.50
12/15/20221,210,000 shares $21.62 million -18.8%5.3%3.1 $17.87
11/30/20221,490,000 shares $27.79 million -11.8%6.6%3.7 $18.65
11/15/20221,690,000 shares $33.85 million -8.2%7.4%4.3 $20.03
10/31/20221,840,000 shares $41.49 million -10.2%8.2%4.4 $22.55
10/15/20222,050,000 shares $39.20 million -18.3%9.2%5 $19.12
9/30/20222,510,000 shares $52.74 million +6.4%11.2%6.6 $21.01
9/15/20222,360,000 shares $54.09 million +0.9%10.5%7.1 $22.92
8/31/20222,340,000 shares $58.45 million +8.3%11.4%7.9 $24.98
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8/15/20222,160,000 shares $55.58 million +1.9%10.6%7.5 $25.73
7/31/20222,120,000 shares $53.21 million +0.5%11.5%8.1 $25.10
7/15/20222,110,000 shares $50.91 million +5.0%11.7%9.2 $24.13
6/30/20222,010,000 shares $39.11 million +21.8%11.1%8.8 $19.46
6/15/20221,650,000 shares $31.17 million +16.2%9.2%7.3 $18.89
5/31/20221,420,000 shares $33.21 million +67.9%7.9%7.4 $23.39
5/15/2022846,000 shares $20.30 million +13.7%4.7%4.7 $24.00
4/30/2022744,300 shares $17.70 million +14.0%4.1%4.3 $23.78
4/15/2022653,000 shares $17.96 million +19.8%3.6%3.6 $27.50
3/31/2022545,100 shares $12.00 million -27.2%3.2%3 $22.02
3/15/2022748,800 shares $16.21 million +55.7%4.4%4.3 $21.65
2/28/2022480,900 shares $11.40 million +2.7%2.9%2.9 $23.70
2/15/2022468,200 shares $10.28 million -18.1%2.8%2.8 $21.95
1/31/2022571,900 shares $10.89 million +20.3%3.5%3.5 $19.05
1/15/2022475,500 shares $8.91 million +5.2%2.8%3.5 $18.74
12/31/2021452,100 shares $7.21 million -0.5%2.7%3.3 $15.95
12/15/2021454,400 shares $6.65 million +10.3%2.7%2 $14.63
11/30/2021411,800 shares $5.86 million +13.6%2.5%1.8 $14.23
11/15/2021362,600 shares $5.62 million -19.9%2.2%1.6 $15.49
10/29/2021452,400 shares $7.18 million -3.6%2.7%2.2 $15.88
10/15/2021469,300 shares $8.03 million -2.1%3.1%2.3 $17.12
9/30/2021479,200 shares $9.55 million +17.3%3.1%2.6 $19.92
9/15/2021408,400 shares $7.53 million -11.6%2.6%3.9 $18.43
8/31/2021461,800 shares $7.50 million +5.2%3.0%5.6 $16.25
8/13/2021439,200 shares $6.25 million +10.8%2.9%5.4 $14.24
7/30/2021396,400 shares $5.73 million -43.4%2.6%4.6 $14.45
7/15/2021699,800 shares $10.93 million +3.8%4.6%9 $15.62
6/30/2021673,900 shares $11.65 million -10.4%4.4%8.6 $17.29
6/15/2021751,800 shares $13.53 million +5.8%5.0%8.8 $18.00
5/28/2021710,600 shares $11.75 million -4.1%4.7%7.5 $16.54

MIRM Short Interest - Frequently Asked Questions

Short interest is the volume of Mirum Pharmaceuticals shares that have been sold short but have not yet been closed out or covered. As of May 15th, investors have sold 8,196,668 shares of MIRM short. 15.70% of Mirum Pharmaceuticals' shares are currently sold short. Learn More on Mirum Pharmaceuticals' 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. MIRM shares currently have a short interest ratio of 4.8. Learn More on Mirum Pharmaceuticals'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. 15.70% of Mirum Pharmaceuticals' floating shares are currently sold short.

Mirum Pharmaceuticals saw a decrease in short interest during the month of May. As of May 15th, there was short interest totaling 8,196,668 shares, a decrease of 2.6% from the previous total of 8,413,814 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.

15.70% of Mirum Pharmaceuticals' shares are currently sold short. Here is how the short interest of companies in the industry of "pharmaceutical products" compare to Mirum Pharmaceuticals: Insmed, Inc. (8.30%), BioNTech SE Sponsored ADR (1.20%), Roivant Sciences Ltd. (4.29%), Viatris Inc. (3.28%), Moderna, Inc. (16.41%), Genmab A/S Sponsored ADR (1.66%), Ascendis Pharma A/S (4.60%), Regencell Bioscience Holdings Limited (0.16%), BridgeBio Pharma, Inc. (14.38%), Summit Therapeutics PLC (23.28%),

As of the most recent reporting period, the following stocks had the largest short interest positions: SPDR S&P 500 ETF Trust ($80.71 billion), Invesco QQQ ($47.96 billion), iShares Russell 2000 ETF ($22.13 billion), Western Digital Corporation ($14.35 billion), Sandisk Corporation ($12.86 billion), Salesforce Inc. ($10.89 billion), Nebius Group N.V. ($9.92 billion), SPDR S&P Biotech ETF ($9.72 billion), Lumentum Holdings Inc. ($8.89 billion), and iShares 20+ Year Treasury Bond ETF ($8.18 billion). View all of the most shorted stocks.

Short selling MIRM is an investing strategy that aims to generate trading profit from Mirum Pharmaceuticals as its price is falling. MIRM shares are trading down $1.57 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 Mirum Pharmaceuticals 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 MIRM, 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 MIRM, twice per month. The most recent reporting period available is May, 15 2026.

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

  • 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.


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This page (NASDAQ:MIRM) was last updated on 5/28/2026 by MarketBeat.com Staff.
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