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Armata Pharmaceuticals (ARMP) Short Interest Ratio & Short Volume

Armata Pharmaceuticals logo
$3.52 +0.21 (+6.34%)
Closing price 10/2/2026 04:10 PM Eastern
Extended Trading
$3.63 +0.11 (+3.13%)
As of 10/2/2026 08:00 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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Armata Pharmaceuticals Short Interest Overview

As of September 15, 2026, Armata Pharmaceuticals (ARMP) had a short interest of 963,383 shares sold short, representing 16.72% of the public float. This marks a 8.82% increase in short interest since the prior report. The short interest ratio (days to cover) is 1.7, meaning it would take 1.7 days of the average trading volume of 375,619 shares to cover all short positions.

Current Short Interest
963,383 shares
Previous Short Interest
885,291 shares
Change Vs. Previous Month
8.82%
Dollar Volume Sold Short
$4.24 million
Short Interest Ratio
1.7 Days to Cover
Last Record Date
September 15, 2026
Outstanding Shares
37,180,000 shares
Short Percent of Float
16.72%
Today's Trading Volume
124,467 shares
Average Trading Volume
375,619 shares
Today's Volume Vs. Average
33%
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Short Interest ChartDays to Cover ChartShort Percent of Float Chart

ARMP Short Interest Over Time

ARMP Days to Cover Over Time

ARMP Percentage of Float Shorted Over Time

Armata 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
9/15/2026963,383 shares $4.24 million +8.8%16.7%1.65 $4.40
8/31/2026885,291 shares $4.88 million +6.1%15.4%8.68 $5.51
8/14/2026834,737 shares $3.81 million -2.5%14.5%6.42 $4.56
7/31/2026856,363 shares $3.89 million +21.5%15.1%4.98 $4.54
7/15/2026704,657 shares $2.81 million +59.7%12.4%4.55 $3.99
6/30/2026441,157 shares $2.86 million +113.3%7.8%1.46 $6.48
6/15/2026206,873 shares $1.43 million -1.2%3.6%3.86 $6.91
5/29/2026209,363 shares $1.71 million -7.0%3.7%2.48 $8.17
5/15/2026225,033 shares $1.81 million -2.2%4.0%2.91 $8.05
4/30/2026230,017 shares $2.30 million -5.9%4.0%2.89 $9.98
4/15/2026244,306 shares $2.95 million -18.0%4.3%4.44 $12.06
3/31/2026297,898 shares $3.05 million -4.2%5.2%9.66 $10.24
3/13/2026310,810 shares $3.28 million +4.3%5.5%9.37 $10.54
2/27/2026298,102 shares $3.21 million -0.1%5.2%4.46 $10.76
2/13/2026298,337 shares $2.43 million +8.5%5.2%6.65 $8.15
1/30/2026274,891 shares $1.84 million +23.8%4.9%6.63 $6.70
1/15/2026222,054 shares $1.42 million +53.8%3.9%2.94 $6.38
12/31/2025144,352 shares $906.53 thousand +7.7%2.6%5.29 $6.28
12/15/2025133,987 shares $825.36 thousand +2.1%2.4%2.28 $6.16
11/28/2025131,252 shares $962.08 thousand -16.5%2.3%1.88 $7.33
11/14/2025157,247 shares $1.15 million +410.1%2.8%1.19 $7.32
10/31/202530,828 shares $151.37 thousand +40.3%0.5%0.02 $4.91
10/15/202522,000 shares $75.02 thousand -8.3%0.2%0.1 $3.41
9/30/202524,000 shares $71.52 thousand -14.0%0.2%2.2 $2.98
9/15/202527,900 shares $83.42 thousand -24.2%0.3%2.2 $2.99
8/31/202536,800 shares $92 thousand -25.7%0.3%2.4 $2.50
8/15/202549,500 shares $126.23 thousand -2.0%0.5%2.7 $2.55
7/31/202550,500 shares $123.73 thousand -24.9%0.5%0.2 $2.45
7/15/202567,200 shares $165.31 thousand -35.1%0.6%0.3 $2.46
6/30/2025103,600 shares $196.84 thousand -22.7%1.0%0.4 $1.90
6/15/2025134,100 shares $250.77 thousand -25.0%1.2%0.6 $1.87
5/31/2025178,800 shares $339.72 thousand +4,157.1%1.7%0.7 $1.90
5/15/20254,200 shares $5.88 thousand -44.0%0.0%0 $1.40
4/30/20257,500 shares $11.93 thousand +19.1%0.1%0.4 $1.59
4/15/20256,300 shares $7.25 thousand +75.0%0.1%0.4 $1.15
3/31/20253,600 shares $5.26 thousand -53.3%0.0%0.2 $1.46
3/15/20257,700 shares $15.02 thousand +28.3%0.1%0.6 $1.95
2/28/20256,000 shares $0.00 -15.5%0.1%0.5 $0.00
2/15/20257,100 shares $0.00 -61.8%0.1%0.6 $0.00
1/31/202518,600 shares $0.00 +7.5%0.2%1.7 $0.00
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1/15/202517,300 shares $0.00 -6.5%0.2%1.5 $0.00
12/31/202418,500 shares $0.00 +203.3%0.2%1.7 $0.00
12/15/20246,100 shares $0.00 +125.9%0.1%0.7 $0.00
11/30/20242,700 shares $0.00 -66.3%0.0%0.4 $0.00
11/15/20248,000 shares $0.00 +77.8%0.1%1.1 $0.00
10/31/20244,500 shares $0.00 -23.7%0.0%0.6 $0.00
10/15/20245,900 shares $0.00 +73.5%0.1%0.8 $0.00
9/30/20243,400 shares $0.00 -35.9%0.0%0.4 $0.00
9/15/20245,300 shares $0.00 -24.3%0.1%0.6 $0.00
8/31/20247,000 shares $0.00 +11.1%0.1%0.8 $0.00
8/15/20246,300 shares $0.00 +133.3%0.1%0.6 $0.00
7/31/20242,700 shares $0.00 -12.9%0.0%0.2 $0.00
7/15/20243,100 shares $0.00 -44.6%0.0%0.3 $0.00
6/30/20245,600 shares $0.00 +522.2%0.1%0.5 $0.00
6/15/2024900 shares $0.00 -60.9%0.0%0.1 $0.00
5/31/20242,300 shares $0.00 +187.5%0.0%0.2 $0.00
5/15/2024800 shares $0.00 -92.5%0.0%0 $0.00
4/30/202410,700 shares $0.00 +8.1%0.1%0.7 $0.00
4/15/20249,900 shares $0.00 -30.3%0.1%0.6 $0.00
3/31/202414,200 shares $0.00 +6.8%0.1%0.8 $0.00
3/15/202413,300 shares $0.00 -55.1%0.1%0.6 $0.00
2/29/202429,600 shares $0.00 -32.0%0.3%1.5 $0.00
2/15/202443,500 shares $0.00 -5.2%0.4%2.4 $0.00
1/31/202445,900 shares $0.00 -17.9%0.4%2.6 $0.00
1/15/202455,900 shares $0.00 -31.1%0.5%3.2 $0.00
12/31/202381,100 shares $0.00 -18.2%0.8%5 $0.00
12/15/202399,100 shares $0.00 +9.4%0.9%7.1 $0.00
11/30/202390,600 shares $0.00 -8.3%0.8%5.1 $0.00
11/15/202398,800 shares $0.00 -0.9%0.9%4.4 $0.00
10/31/202399,700 shares $0.00 -25.4%0.9%2.6 $0.00
10/15/2023133,700 shares $0.00 -19.6%1.2%1 $0.00
9/30/2023166,200 shares $0.00 -4.3%1.5%0.9 $0.00
9/15/2023173,700 shares $0.00 -6.8%1.6%1 $0.00
8/31/2023186,300 shares $0.00 -11.8%1.7%1.1 $0.00
8/15/2023211,100 shares $0.00 -21.5%1.9%1.3 $0.00
7/31/2023268,800 shares $0.00 +688.3%2.5%1.8 $0.00
7/15/202334,100 shares $0.00 +14.8%0.3%0.7 $0.00
6/30/202329,700 shares $0.00 +13.4%0.3%4 $0.00
6/15/202326,200 shares $0.00 +19.6%0.2%3.4 $0.00
5/31/202321,900 shares $0.00 No Change0.2%2.3 $0.00
5/15/202321,900 shares $0.00 -41.8%0.2%1.7 $0.00
4/30/202337,600 shares $0.00 +15.7%0.3%2.9 $0.00
4/15/202332,500 shares $0.00 +18.6%0.3%2.1 $0.00
3/31/202327,400 shares $0.00 -21.5%0.3%1.6 $0.00
3/15/202334,900 shares $0.00 +52.4%0.3%1.6 $0.00
2/28/202322,900 shares $0.00 -3.0%0.2%1 $0.00
2/15/202323,600 shares $0.00 -9.2%0.2%1.1 $0.00
1/31/202326,000 shares $0.00 -31.8%0.2%1.2 $0.00
1/15/202338,100 shares $0.00 +45.4%0.4%1.9 $0.00
12/30/202226,200 shares $0.00 -51.1%0.2%1.5 $0.00
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12/15/202253,600 shares $0.00 +31.1%0.5%3.7 $0.00
11/30/202240,900 shares $0.00 -14.6%0.4%4.4 $0.00
11/15/202247,900 shares $0.00 -14.2%0.4%7.5 $0.00
10/31/202255,800 shares $0.00 -12.4%0.5%10.3 $0.00
10/15/202263,700 shares $0.00 -3.0%0.6%15.2 $0.00
9/30/202265,700 shares $0.00 -17.2%0.6%16.4 $0.00
9/15/202279,300 shares $0.00 +7.0%0.7%20.9 $0.00
8/31/202274,100 shares $0.00 +1.7%0.7%19 $0.00
8/15/202272,900 shares $0.00 +0.6%0.7%18.7 $0.00
7/31/202272,500 shares $0.00 -1.0%0.7%15.4 $0.00
7/15/202273,200 shares $0.00 -0.5%0.7%14.4 $0.00
6/30/202273,600 shares $286.30 thousand -20.6%0.7%12.1 $3.89
6/15/202292,700 shares $0.00 -18.8%0.9%13.8 $0.00
5/31/2022114,100 shares $0.00 -9.7%1.8%13.6 $0.00
5/15/2022126,400 shares $0.00 -9.8%2.0%13 $0.00
4/30/2022140,100 shares $0.00 -6.5%2.6%11.9 $0.00
4/15/2022149,800 shares $0.00 +6.4%2.8%10.2 $0.00
3/31/2022140,800 shares $0.00 +0.2%7.1%7.9 $0.00
3/15/2022140,500 shares $0.00 +2.6%1.7%6.8 $0.00
2/28/2022136,900 shares $0.00 +1.9%1.9%6 $0.00
2/15/2022134,400 shares $0.00 +4.4%1.9%4.2 $0.00
1/31/2022128,800 shares $0.00 -6.8%1.2%3.4 $0.00
1/15/2022138,200 shares $0.00 +15.6%1.3%2.9 $0.00
12/31/2021119,600 shares $0.00 +68.5%1.1%2.6 $0.00
12/15/202171,000 shares $0.00 -17.7%0.7%1.6 $0.00
11/30/202186,300 shares $0.00 +992.4%0.9%2.3 $0.00
11/15/20217,900 shares $0.00 +113.5%0.1%0.2 $0.00
10/29/20213,700 shares $11.84 thousand -75.8%0.0%0.2 $3.20
10/15/202115,300 shares $0.00 -52.0%0.2%2.6 $0.00

ARMP Short Interest - Frequently Asked Questions

Short interest is the volume of Armata Pharmaceuticals shares that have been sold short but have not yet been closed out or covered. As of September 15th, investors have sold 963,383 shares of ARMP short. 16.72% of Armata Pharmaceuticals' shares are currently sold short. Learn More on Armata 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. ARMP shares currently have a short interest ratio of 1.7. Learn More on Armata 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. 16.72% of Armata Pharmaceuticals' floating shares are currently sold short.

Armata Pharmaceuticals saw a increase in short interest in September. As of September 15th, there was short interest totaling 963,383 shares, an increase of 8.8% from the previous total of 885,291 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.

16.72% of Armata Pharmaceuticals' shares are currently sold short. Here is how the short interest of companies in the industry of "biotechnology" compare to Armata Pharmaceuticals: Entera Bio Ltd. (0.82%), Autolus Therapeutics PLC Sponsored ADR (4.21%), REGENXBIO Inc. (14.00%), Arvinas, Inc. (8.34%), Kamada Ltd. (0.44%), DiaMedica Therapeutics, Inc. (10.71%), Tectonic Therapeutic, Inc. (18.85%), Prothena Corporation plc (18.22%), Kyverna Therapeutics, Inc. (17.20%), Eikon Therapeutics, Inc. (10.07%),

As of the most recent reporting period, the following stocks had the largest short interest positions: SPDR S&P 500 ETF Trust ($75.21 billion), Invesco QQQ ($46.31 billion), iShares Russell 2000 ETF ($27.98 billion), SPDR S&P Biotech ETF ($11.59 billion), Nebius Group N.V. ($9.70 billion), Canadian Natural Resources Limited ($9.42 billion), iShares 20+ Year Treasury Bond ETF ($8.70 billion), iShares iBoxx $ High Yield Corporate Bond ETF ($8.53 billion), iShares iBoxx $ Investment Grade Corporate Bond ETF ($7.79 billion), and Financial Select Sector SPDR Fund ($7.74 billion). View all of the most shorted stocks.

Short selling ARMP is an investing strategy that aims to generate trading profit from Armata Pharmaceuticals as its price is falling. ARMP shares are trading up $0.21 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 Armata 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 ARMP, 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 ARMP, twice per month. The most recent reporting period available is September, 15 2026.

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

  • 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 NYSEAMERICAN:ARMP is sourced from the Financial Industry Regulatory Authority (FINRA), with the most recent report published on 9/24/2026. FINRA publishes updated short interest twice a month.
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