Free Trial

Spero Therapeutics (SPRO) Short Interest Ratio & Short Volume

Spero Therapeutics logo
$0.69 +0.01 (+0.82%)
Closing price 05/21/2025 04:00 PM Eastern
Extended Trading
$0.68 -0.01 (-0.99%)
As of 05/21/2025 07:20 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 Polygon.io. Learn more.

Spero Therapeutics Short Interest Data

Spero Therapeutics (SPRO) has a short interest of 645,200 shares. This marks a -19.48% decrease in short interest from the previous month. The short interest ratio (days to cover) is 5.0, indicating that it would take 5.0 days of the average trading volume of 182,952 shares to cover all short positions.

Current Short Interest
645,200 shares
Previous Short Interest
801,300 shares
Change Vs. Previous Month
-19.48%
Dollar Volume Sold Short
$424,541.60
Short Interest Ratio
5.0 Days to Cover
Last Record Date
April 30, 2025
Outstanding Shares
55,911,000 shares
Percentage of Shares Shorted
1.15%
Today's Trading Volume
86,477 shares
Average Trading Volume
182,952 shares
Today's Volume Vs. Average
47%
Short Selling Spero Therapeutics?
cover of A Guide to High-Short-Interest Stocks and How to Trade Them ebook

Sign up to receive the latest short interest report for Spero Therapeutics and its competitors with MarketBeat's FREE newsletter.

Skip Charts & View Short Interest History

SPRO Short Interest Over Time

SPRO Days to Cover Over Time

SPRO Percentage of Float Shorted Over Time

Spero Therapeutics Short Interest History

Report DateTotal Shares Sold ShortDollar Volume Sold ShortChange from Previous ReportPercentage of Float ShortedDays to CoverPrice on Report Date
4/30/2025645,200 shares $424,541.60 -19.5%N/A5 $0.66
4/15/2025801,300 shares $596,487.72 +60.9%1.5%4.8 $0.74
3/31/2025498,100 shares $358,632.00 +13.9%1.0%2.6 $0.72
3/15/2025437,300 shares $342,143.52 +3.0%0.8%2.2 $0.78
2/28/2025424,700 shares $329,397.32 -1.1%0.8%2 $0.78
2/15/2025429,600 shares $350,124.00 +14.0%0.8%1.9 $0.82
1/31/2025376,800 shares $322,766.88 +6.4%N/A1.5 $0.86
1/15/2025354,100 shares $317,698.52 -14.2%N/A1.2 $0.90
12/31/2024412,600 shares $424,978.00 -8.6%N/A1.4 $1.03
12/15/2024451,200 shares $482,784.00 -8.6%N/A1.7 $1.07
11/30/2024493,800 shares $562,932.00 -9.7%N/A2 $1.14
11/15/2024546,800 shares $645,224.00 -12.5%N/A2.3 $1.18
10/31/2024625,200 shares $768,996.00 +61.5%N/A3 $1.23
10/15/2024387,100 shares $464,520.00 +0.7%N/A3.2 $1.20
9/30/2024384,300 shares $514,962.00 -0.2%N/A3 $1.34
9/15/2024385,200 shares $527,724.00 -5.8%N/A3.4 $1.37
8/31/2024409,100 shares $560,467.00 +8.6%N/A3.1 $1.37
8/15/2024376,700 shares $455,807.00 +5.8%N/A2.9 $1.21
7/31/2024355,900 shares $501,819.00 -8.8%N/A2.6 $1.41
7/15/2024390,300 shares $563,983.50 -7.1%N/A2.7 $1.45
6/30/2024420,000 shares $546,000.00 -3.3%N/A2.5 $1.30
6/15/2024434,200 shares $590,512.00 -10.3%N/A2.3 $1.36
5/31/2024483,900 shares $687,138.00 -2.1%N/A1.7 $1.42
5/15/2024494,200 shares $800,604.00 +5.6%N/A1.6 $1.62
4/30/2024468,100 shares $664,702.00 -8.8%N/A1.5 $1.42
4/15/2024513,200 shares $785,196.00 -21.5%N/A1.6 $1.53
3/31/2024653,800 shares $1.12 million +6.5%N/A2.1 $1.72
3/15/2024613,900 shares $1.10 million +8.9%N/A2 $1.79
2/29/2024564,000 shares $930,600.00 -8.9%N/A2.8 $1.65
2/15/2024619,000 shares $940,880.00 -12.5%N/A3.2 $1.52
1/31/2024707,100 shares $1.07 million +4.0%N/A3.8 $1.52
1/15/2024680,200 shares $986,290.00 -13.8%N/A4 $1.45
12/31/2023789,000 shares $1.16 million -19.2%N/A4.5 $1.47
12/15/2023976,500 shares $1.26 million -9.6%N/A6 $1.29
11/30/20231,080,000 shares $1.23 million -4.4%N/A6.2 $1.14
11/15/20231,130,000 shares $1.29 million -10.3%N/A4.7 $1.14
10/31/20231,260,000 shares $1.36 million -3.1%N/A4.8 $1.08
10/15/20231,300,000 shares $1.47 million -3.7%N/A4.1 $1.13
9/30/20231,350,000 shares $1.63 million -5.6%N/A4.2 $1.21
9/15/20231,430,000 shares $1.83 million +25.4%N/A4.3 $1.28
Think NVDA’s run was epic? You ain’t seen nothin’ yet (Ad)

Ask most investors and they’ll probably tell you Nvidia is the undisputed AI stock of the decade. In 2023, it surged 239%. And in 2024, it soared another 171% on the year… But what if I told you there was a way to target those types of “peak Nvidia” profit opportunities in 24 hours or less?

Click to find out what Nvidia’s CEO might reveal… and how Sykes is preparing to ride the wave.
8/31/20231,140,000 shares $1.71 million No ChangeN/A3.2 $1.50
8/15/20231,140,000 shares $1.53 million -2.6%N/A3.8 $1.35
7/31/20231,170,000 shares $1.91 million No ChangeN/A3.9 $1.63
7/15/20231,170,000 shares $1.77 million -4.9%N/A4.2 $1.51
6/30/20231,230,000 shares $1.78 million +40.4%N/A4 $1.45
6/15/2023876,300 shares $1.38 million -0.6%N/A1.8 $1.57
5/31/2023881,800 shares $1.53 million -9.5%N/A1.7 $1.74
5/15/2023974,400 shares $1.82 million -32.8%N/A1.7 $1.87
4/30/20231,450,000 shares $2.57 million -21.6%N/A2.5 $1.77
4/15/20231,850,000 shares $3.18 million +17.1%N/A3.3 $1.72
3/31/20231,580,000 shares $2.29 million +67.6%N/A2.8 $1.45
3/15/2023942,700 shares $1.39 million +142.0%N/A2.1 $1.47
2/28/2023389,500 shares $576,460.00 +35.5%N/A0.9 $1.48
2/15/2023287,400 shares $514,446.00 -38.6%N/A0.7 $1.79
1/31/2023468,200 shares $866,170.00 -29.9%N/A0.8 $1.85
1/15/2023667,900 shares $1.34 million -21.4%N/A1.1 $2.00
12/30/2022849,400 shares $1.47 million -14.6%N/A1.1 $1.73
12/15/2022994,200 shares $1.69 million -23.5%N/A0.4 $1.70
11/30/20221,300,000 shares $2.52 million -13.9%N/A0.2 $1.94
11/15/20221,510,000 shares $2.84 million +22.8%5.5%0.2 $1.88
10/31/20221,230,000 shares $2.41 million -15.8%4.5%0.2 $1.96
10/15/20221,460,000 shares $2.89 million -32.4%5.4%0.2 $1.98
9/30/20222,160,000 shares $4.32 million +177.9%8.0%0.3 $2.00
9/15/2022777,200 shares $753,884.00 +182.0%2.9%0.1 $0.97
8/31/2022275,600 shares $222,381.64 -32.9%1.0%0.1 $0.81
8/15/2022410,600 shares $371,059.22 +1.1%1.5%1.3 $0.90
7/31/2022406,100 shares $297,346.42 -27.2%1.6%1.1 $0.73
7/15/2022557,800 shares $440,662.00 +34.9%2.3%0.8 $0.79
6/30/2022413,600 shares $306,477.60 -70.9%1.7%0.6 $0.74
6/15/20221,420,000 shares $1.36 million -9.0%5.8%1.9 $0.96
5/31/20221,560,000 shares $1.84 million -5.5%6.4%2.3 $1.18
5/15/20221,650,000 shares $2.82 million -55.3%6.8%2.6 $1.71
4/30/20223,690,000 shares $17.93 million +6.7%14.6%6.3 $4.86
4/15/20223,460,000 shares $21.14 million +6.5%13.7%16.7 $6.11
3/31/20223,250,000 shares $28.28 million +4.2%13.1%16.5 $8.70
3/15/20223,120,000 shares $25.40 million +5.4%12.6%18.6 $8.14
2/28/20222,960,000 shares $28.42 million +5.7%11.9%20.8 $9.60
2/15/20222,800,000 shares $27.94 million +12.0%11.3%19.6 $9.98
1/31/20222,500,000 shares $29.68 million +4.6%10.1%18.6 $11.87
1/15/20222,390,000 shares $31.55 million +4.4%9.4%21.1 $13.20
12/31/20212,290,000 shares $36.66 million -1.7%9.0%23.2 $16.01
12/15/20212,330,000 shares $30.64 million -0.9%9.2%24.5 $13.15
11/30/20212,350,000 shares $33.49 million -2.5%9.3%23.9 $14.25
11/15/20212,410,000 shares $39.55 million -3.6%9.5%22.4 $16.41
10/29/20212,500,000 shares $43.90 million No Change9.9%21 $17.56
10/15/20212,500,000 shares $42.55 million -1.2%9.9%21.4 $17.02
9/30/20212,530,000 shares $46.58 million -1.9%10.0%20.4 $18.41
9/15/20212,580,000 shares $47.81 million -4.1%10.2%16.4 $18.53
8/31/20212,690,000 shares $51.78 million +1.9%10.9%15.8 $19.25
8/13/20212,640,000 shares $35.69 million No Change10.7%16.5 $13.52
July 2025 Rule Change to Impact Retirement Investors (Ad)

There's a massive change from a new rule going into effect this July. And it's one the Big Banks are already using to their advantage… It allows them to treat this new asset like actual cash.

Yes, Send Me My FREE Retirement Guide
7/30/20212,640,000 shares $35.22 million No Change11.6%17 $13.34
7/15/20212,640,000 shares $37.73 million +10.0%12.1%16.6 $14.29
6/30/20212,400,000 shares $33.50 million -23.1%9.9%14.5 $13.96
6/15/20213,120,000 shares $47.55 million -1.0%12.9%22.1 $15.24
5/28/20213,150,000 shares $45.68 million -3.4%13.0%20.3 $14.50
5/14/20213,260,000 shares $42.28 million -2.1%N/A19.9 $12.97
4/30/20213,330,000 shares $45.59 million -2.1%N/A17.5 $13.69
4/15/20213,400,000 shares $44.81 million +0.6%N/A14 $13.18
3/31/20213,380,000 shares $46.04 million +50.9%N/A12.9 $13.62
3/15/20212,240,000 shares $37.50 million +1.8%N/A6.7 $16.74
2/26/20212,200,000 shares $40.44 million -1.8%N/A6.6 $18.38
2/12/20212,240,000 shares $45.52 million -0.4%N/A6.6 $20.32
1/29/20212,250,000 shares $40.95 million +0.9%N/A6.4 $18.20
1/15/20212,230,000 shares $37.08 million -0.9%N/A7.3 $16.63
12/31/20202,250,000 shares $45.52 million +17.8%N/A7.3 $20.23
12/15/20201,910,000 shares $34.02 million -2.1%N/A6.2 $17.81
11/30/20201,950,000 shares $32.62 million +1.6%N/A5.9 $16.73
11/15/20201,920,000 shares $27.49 million +2.7%N/A5 $14.32
10/30/20201,870,000 shares $25.13 million +3.3%N/A5.1 $13.44
10/15/20201,810,000 shares $24.63 million +1.7%N/A5.2 $13.61
9/30/20201,780,000 shares $19.86 million -6.3%N/A5.4 $11.16
9/15/20201,900,000 shares $18.98 million +49.6%N/A6.4 $9.99
8/31/20201,270,000 shares $13.80 million +18.7%8.5%5.3 $10.87
8/14/20201,070,000 shares $13.38 million +2.9%7.2%6.7 $12.50
7/31/20201,040,000 shares $12.17 million +8.0%7.0%6.2 $11.70
7/15/2020963,100 shares $12.96 million +11.1%6.7%5 $13.46
6/30/2020866,900 shares $11.49 million +39.1%6.0%4.6 $13.25
6/15/2020623,200 shares $7.45 million +8.0%4.3%3.7 $11.95
5/29/2020577,300 shares $6.82 million -0.9%4.0%3.6 $11.82

SPRO Short Interest - Frequently Asked Questions

What is Spero Therapeutics' current short interest?

Short interest is the volume of Spero Therapeutics shares that have been sold short but have not yet been closed out or covered. As of April 30th, investors have sold 645,200 shares of SPRO short. Learn More on Spero Therapeutics' current short interest.

What is a good short interest ratio for Spero Therapeutics?

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. SPRO shares currently have a short interest ratio of 5.0. Learn More on Spero Therapeutics's short interest ratio.

Which institutional investors are shorting Spero Therapeutics?

As of the most recent reporting period, the following institutional investors, funds, and major shareholders have reported short positions of Spero Therapeutics: Simplex Trading LLC. These positions are disclosed in Form 13F filings with the Securities and Exchange Commission.

Is Spero Therapeutics' short interest increasing or decreasing?

Spero Therapeutics saw a drop in short interest in the month of April. As of April 30th, there was short interest totaling 645,200 shares, a drop of 19.5% from the previous total of 801,300 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.

How does Spero Therapeutics' short interest compare to its competitors?

Here is how the short interest of companies in the industry of "pharmaceutical products" compare to Spero Therapeutics: Aclaris Therapeutics, Inc. (4.11%), ADC Therapeutics SA (4.51%), Larimar Therapeutics, Inc. (9.32%), Editas Medicine, Inc. (13.87%), Greenwich LifeSciences, Inc. (16.77%), Protara Therapeutics, Inc. (6.43%), scPharmaceuticals Inc. (4.32%), Lyell Immunopharma, Inc. (4.53%), Tonix Pharmaceuticals Holding Corp. (14.19%), Fate Therapeutics, Inc. (11.64%),

Which stocks are the most shorted right now?

As of the most recent reporting period, the following stocks had the largest short interest positions: Spotify Technology S.A. ($4.67 billion), Charter Communications, Inc. ($4.58 billion), Capital One Financial Co. ($4.47 billion), The Kroger Co. ($2.56 billion), Reddit, Inc. ($2.23 billion), Rivian Automotive, Inc. ($2.16 billion), Live Nation Entertainment, Inc. ($1.90 billion), SoFi Technologies, Inc. ($1.85 billion), Zscaler, Inc. ($1.75 billion), and Omnicom Group Inc. ($1.75 billion). View all of the most shorted stocks.

What does it mean to sell short Spero Therapeutics stock?

Short selling SPRO is an investing strategy that aims to generate trading profit from Spero Therapeutics as its price is falling. SPRO shares are trading up $0.01 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.

How does a short squeeze work against Spero Therapeutics?

A short squeeze for Spero 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 SPRO, which in turn drives the price of the stock up even further.

How often is Spero Therapeutics' short interest reported?

Short interest is typically published by a stock exchange once per month. However, NASDAQ publishes a report for U.S. stocks, including SPRO, twice per month. The most recent reporting period available is April, 30 2025.




This page (NASDAQ:SPRO) was last updated on 5/22/2025 by MarketBeat.com Staff
From Our Partners