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Seres Therapeutics (MCRB) Short Interest Ratio & Short Volume

Seres Therapeutics logo
$7.76 -0.20 (-2.51%)
Closing price 05/13/2026 04:00 PM Eastern
Extended Trading
$7.82 +0.06 (+0.82%)
As of 05/13/2026 07:52 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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Seres Therapeutics Short Interest Overview

As of April 30, 2026, Seres Therapeutics (MCRB) had a short interest of 540,750 shares sold short, representing 5.86% of the public float. This marks a -7.58% decrease in short interest since the prior report. The short interest ratio (days to cover) is 8.8, meaning it would take 8.8 days of the average trading volume of 57,710 shares to cover all short positions.

Current Short Interest
540,750 shares
Previous Short Interest
585,069 shares
Change Vs. Previous Month
-7.58%
Dollar Volume Sold Short
$3.99 million
Short Interest Ratio
8.8 Days to Cover
Last Record Date
April 30, 2026
Outstanding Shares
9,684,000 shares
Short Percent of Float
5.86%
Today's Trading Volume
35,440 shares
Average Trading Volume
57,710 shares
Today's Volume Vs. Average
61%
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Short Interest ChartDays to Cover ChartShort Percent of Float Chart

MCRB Short Interest Over Time

MCRB Days to Cover Over Time

MCRB Percentage of Float Shorted Over Time

Seres Therapeutics 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
4/30/2026540,750 shares $3.99 million -7.6%5.9%8.79 $7.37
4/15/2026585,069 shares $5.17 million -2.1%6.4%14.88 $8.84
3/31/2026597,314 shares $5.30 million -5.0%6.5%12.06 $8.87
3/13/2026628,417 shares $5.42 million -4.1%6.9%14.3 $8.63
2/27/2026655,113 shares $5.73 million -15.4%7.6%11.24 $8.74
2/13/2026774,647 shares $6.56 million -6.3%9.0%5.04 $8.47
1/30/2026826,932 shares $12.34 million -5.5%9.6%22.13 $14.92
1/15/2026874,572 shares $13.28 million -2.8%10.1%18.72 $15.18
12/31/2025900,095 shares $13.39 million -9.1%10.4%13.22 $14.88
12/15/2025989,990 shares $15.74 million -0.7%11.5%10.85 $15.90
11/28/2025996,857 shares $17.91 million +7.7%11.6%1.65 $17.97
11/14/2025925,479 shares $15.42 million -6.0%10.7%9.58 $16.66
10/31/2025984,687 shares $15.85 million +23.3%11.4%11.5 $16.10
10/15/2025798,700 shares $15.73 million -7.0%12.5%4.9 $19.70
9/30/2025858,400 shares $16.52 million -8.3%13.4%4.9 $19.24
9/15/2025936,300 shares $14.69 million -7.3%14.5%5.2 $15.69
8/31/20251,010,000 shares $19.13 million -1.9%15.7%6.6 $18.94
8/15/20251,030,000 shares $17.19 million +3.0%16.0%8.3 $16.69
7/31/20251,000,000 shares $14.26 million +16.1%15.5%8.3 $14.26
7/15/2025861,100 shares $12.63 million +24.2%13.4%6.9 $14.67
6/30/2025693,100 shares $7.70 million +2.0%10.8%6.1 $11.11
6/15/2025679,400 shares $5.10 million -4.5%10.6%6.9 $7.50
5/31/2025711,200 shares $5.13 million -11.0%11.0%7.7 $7.22
5/15/2025799,000 shares $5.92 million +30.9%12.4%9.4 $7.41
4/30/2025610,400 shares $5.92 million -20.0%9.6%8.1 $9.70
4/15/2025763,100 shares $7.05 million -95.2%12.0%10.9 $9.24
3/31/202516,010,000 shares $11.21 million -4.3%9.9%12.5 $0.70
3/15/202516,720,000 shares $11.53 million -3.0%10.3%11.9 $0.69
2/28/202517,230,000 shares $13.08 million -2.6%10.6%10 $0.76
2/15/202517,690,000 shares $14.73 million +1.3%10.9%8.1 $0.83
1/31/202517,460,000 shares $14.75 million -13.8%N/A6.8 $0.84
1/15/202520,260,000 shares $15.80 million -0.9%N/A7.3 $0.78
12/31/202420,440,000 shares $16.99 million +4.2%N/A7.6 $0.83
12/15/202419,610,000 shares $17.23 million +12.8%N/A5.6 $0.88
11/30/202417,380,000 shares $17.03 million +7.0%N/A4.5 $0.98
11/15/202416,240,000 shares $8.93 million -9.0%N/A4 $0.55
10/31/202417,850,000 shares $14.63 million -1.1%N/A5 $0.82
10/15/202418,050,000 shares $14.72 million -3.3%N/A4.7 $0.82
9/30/202418,660,000 shares $17.65 million +8.4%N/A4.4 $0.95
9/15/202417,220,000 shares $17.21 million +8.0%N/A4.5 $1.00
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8/31/202415,940,000 shares $12.76 million -4.8%N/A4.2 $0.80
8/15/202416,750,000 shares $14.82 million +2.4%N/A4.3 $0.89
7/31/202416,360,000 shares $21.92 million -3.8%N/A3.7 $1.34
7/15/202417,000,000 shares $20.23 million -17.8%N/A3.4 $1.19
6/30/202420,690,000 shares $14.98 million -9.5%N/A4.3 $0.72
6/15/202422,850,000 shares $16.18 million +1.1%N/A4.9 $0.71
5/31/202422,600,000 shares $22.60 million -0.6%N/A4.5 $1.00
5/15/202422,740,000 shares $21.78 million +6.0%N/A4.7 $0.96
4/30/202421,460,000 shares $21.26 million +21.7%N/A4.6 $0.99
4/15/202417,630,000 shares $10.89 million -6.2%N/A4.4 $0.62
3/31/202418,800,000 shares $14.55 million +2.2%N/A4 $0.77
3/15/202418,400,000 shares $14.46 million +14.3%N/A3.9 $0.79
2/29/202416,100,000 shares $18.35 million +3.3%N/A3.3 $1.14
2/15/202415,590,000 shares $17.46 million No ChangeN/A3.5 $1.12
1/31/202415,590,000 shares $17.62 million -11.2%N/A3.4 $1.13
1/15/202417,550,000 shares $21.06 million +7.8%N/A3.3 $1.20
12/31/202316,280,000 shares $22.79 million -21.8%N/A3.3 $1.40
12/15/202320,810,000 shares $20.66 million -0.7%N/A5 $0.99
11/30/202320,950,000 shares $21.79 million -10.4%N/A6 $1.04
11/15/202323,370,000 shares $28.04 million +1.2%N/A6.8 $1.20
10/31/202323,100,000 shares $35.34 million +1.1%N/A7.3 $1.53
10/15/202322,850,000 shares $34.28 million +7.9%N/A9.3 $1.50
9/30/202321,170,000 shares $50.38 million +3.8%N/A10 $2.38
9/15/202320,400,000 shares $58.34 million +0.8%N/A9.6 $2.86
8/31/202320,230,000 shares $69.79 million -13.4%N/A8.5 $3.45
8/15/202323,350,000 shares $87.56 million +3.6%N/A9.3 $3.75
7/31/202322,550,000 shares $108.47 million +1.7%N/A8.5 $4.81
7/15/202322,180,000 shares $100.25 million -2.9%N/A6.4 $4.52
6/30/202322,830,000 shares $109.36 million +25.0%N/A6.3 $4.79
6/15/202318,260,000 shares $104.45 million +17.7%N/A5.2 $5.72
5/31/202315,520,000 shares $76.82 million +3.4%N/A5.1 $4.95
5/15/202315,010,000 shares $80.00 million +23.2%N/A5.4 $5.33
4/30/202312,180,000 shares $59.38 million +36.1%N/A4.9 $4.88
4/15/20238,950,000 shares $52.45 million +3.4%N/A6.2 $5.86
3/31/20238,660,000 shares $49.10 million -7.0%N/A8.4 $5.67
3/15/20239,310,000 shares $54.00 million +19.1%N/A10.5 $5.80
2/28/20237,820,000 shares $39.49 million +8.9%N/A9.9 $5.05
2/15/20237,180,000 shares $36.83 million +9.6%N/A9.9 $5.13
1/31/20236,550,000 shares $35.83 million -0.3%N/A8.9 $5.47
1/15/20236,570,000 shares $36.00 million -3.5%N/A8.2 $5.48
12/30/20226,810,000 shares $38.14 million +43.7%N/A8.5 $5.60
12/15/20224,740,000 shares $27.68 million +11.3%N/A5.7 $5.84
11/30/20224,260,000 shares $27.69 million -1.6%N/A4.4 $6.50
11/15/20224,330,000 shares $30.92 million -9.2%N/A4.4 $7.14
10/31/20224,770,000 shares $42.26 million -3.4%N/A4.8 $8.86
10/15/20224,940,000 shares $33.94 million +0.2%N/A4.9 $6.87
9/30/20224,930,000 shares $31.65 million +45.9%N/A4.7 $6.42
9/15/20223,380,000 shares $24.23 million -1.2%N/A3 $7.17
8/31/20223,420,000 shares $17.58 million +5.2%N/A3 $5.14
8/15/20223,250,000 shares $18.49 million -12.6%3.8%2.8 $5.69
The system holding the dollar together is gone… (Ad)

Saudi Arabia has terminated its 1974 petrodollar agreement with the United States - the deal that forced every country on Earth to hold U.S. dollars to buy oil. Since then, Saudi Arabia has signed a $7 billion currency swap with China, begun settling oil in digital yuan, and joined China's cross-border payment system, mBridge. With 10-year Treasury yields pushing toward the 4.4% danger line and global dollar demand in retreat, gold is being repriced. There's one asset that still trades at a steep discount to gold's current price - a rare opportunity to leverage the metal's continued rise.tc pixel

Learn how to position ahead of the dollar's continued decline
7/31/20223,720,000 shares $15.29 million +4.8%4.6%3 $4.11
7/15/20223,550,000 shares $12.82 million -5.6%4.4%3.1 $3.61
6/30/20223,760,000 shares $12.90 million -25.0%4.6%3.5 $3.43
6/15/20225,010,000 shares $14.13 million +5.7%7.2%5.1 $2.82
5/31/20224,740,000 shares $14.69 million -5.4%6.8%5.6 $3.10
5/15/20225,010,000 shares $18.99 million +0.4%7.2%6.5 $3.79
4/30/20224,990,000 shares $23.60 million +8.2%7.2%6.7 $4.73
4/15/20224,610,000 shares $28.03 million -0.4%6.6%6.1 $6.08
3/31/20224,630,000 shares $32.97 million -14.9%6.7%5.8 $7.12
3/15/20225,440,000 shares $37.37 million -0.4%7.8%6.2 $6.87
2/28/20225,460,000 shares $43.68 million -0.2%7.8%4.3 $8.00
2/15/20225,470,000 shares $46.17 million -1.1%7.9%3.6 $8.44
1/31/20225,530,000 shares $46.12 million -14.8%8.0%3 $8.34
1/15/20226,490,000 shares $52.18 million +9.8%9.3%3.5 $8.04
12/31/20215,910,000 shares $49.23 million -34.3%8.5%3.2 $8.33
12/15/20218,990,000 shares $78.48 million +7.8%12.9%4.7 $8.73
11/30/20218,340,000 shares $89.74 million -6.2%12.0%4.3 $10.76
11/15/20218,890,000 shares $69.43 million +2.0%12.8%4.8 $7.81
10/29/20218,720,000 shares $53.02 million +7.0%12.6%5.5 $6.08
10/15/20218,150,000 shares $51.43 million -10.4%11.8%4.7 $6.31
9/30/20219,100,000 shares $63.34 million +70.1%13.1%4.4 $6.96
9/15/20215,350,000 shares $33.97 million -15.9%7.7%2.5 $6.35
8/31/20216,360,000 shares $40.77 million -9.0%9.2%3.6 $6.41
8/13/20216,990,000 shares $46.48 million +6.1%10.2%4.7 $6.65
7/30/20216,590,000 shares $46.79 million +6.6%9.6%4.5 $7.10
7/15/20216,180,000 shares $125.27 million -2.1%9.0%5.1 $20.27
6/30/20216,310,000 shares $150.49 million -7.5%9.2%7.8 $23.85
6/15/20216,820,000 shares $136.81 million -1.6%9.9%8.7 $20.06
5/28/20216,930,000 shares $146.29 million -2.5%10.1%8.8 $21.11
5/14/20217,110,000 shares $146.89 million -9.5%10.3%7.7 $20.66

MCRB Short Interest - Frequently Asked Questions

Short interest is the volume of Seres Therapeutics shares that have been sold short but have not yet been covered or closed out. As of April 30th, investors have sold 540,750 shares of MCRB short. 5.86% of Seres Therapeutics' shares are currently sold short. Learn More on Seres Therapeutics' 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. MCRB shares currently have a short interest ratio of 8.8. Learn More on Seres Therapeutics'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. 5.86% of Seres Therapeutics' floating shares are currently sold short.

Seres Therapeutics saw a decrease in short interest in the month of April. As of April 30th, there was short interest totaling 540,750 shares, a decrease of 7.6% from the previous total of 585,069 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.

5.86% of Seres Therapeutics' shares are currently sold short. Here is how the short interest of companies in the industry of "pharmaceutical products" compare to Seres Therapeutics: AC Immune (3.12%), Protara Therapeutics, Inc. (11.79%), ALX Oncology Holdings Inc. (2.08%), Fate Therapeutics, Inc. (9.26%), Compugen Ltd. (1.66%), Cybin Inc. (5.78%), Minerva Neurosciences, Inc (3.18%), Inhibikase Therapeutics, Inc. (14.69%), Coherus Oncology, Inc. (19.62%), Artiva Biotherapeutics, Inc. (1.18%),

As of the most recent reporting period, the following stocks had the largest short interest positions: SPDR S&P 500 ETF Trust ($86.09 billion), Invesco QQQ ($39.89 billion), iShares Russell 2000 ETF ($26.13 billion), Western Digital Corporation ($12.66 billion), Salesforce Inc. ($12.29 billion), Sandisk Corporation ($11.87 billion), SPDR S&P Biotech ETF ($9.82 billion), Lumentum Holdings Inc. ($8.51 billion), iShares 20+ Year Treasury Bond ETF ($7.76 billion), and Bloom Energy Corporation ($7.40 billion). View all of the most shorted stocks.

Short selling MCRB is an investing strategy that aims to generate trading profit from Seres Therapeutics as its price is falling. MCRB 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 Seres Therapeutics occurs when it has a large amount of short interest and its stock increases in price. This forces short sellers to cover their short interest positions by buying actual shares of MCRB, 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 MCRB, twice per month. The most recent reporting period available is April, 30 2026.

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

  • 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

This page (NASDAQ:MCRB) was last updated on 5/14/2026 by MarketBeat.com Staff.
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