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Athira Pharma (ATHA) Short Interest Ratio & Short Volume

Athira Pharma logo
$9.55 +0.73 (+8.28%)
As of 05/4/2026
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Athira Pharma Short Interest Overview

As of December 31, 2025, Athira Pharma (ATHA) had a short interest of 160,265 shares sold short, representing 5.07% of the public float. This marks a 2,181.35% increase in short interest since the prior report. The short interest ratio (days to cover) is 0.0, meaning it would take 0.0 days of the average trading volume of 602,475 shares to cover all short positions.

Current Short Interest
160,265 shares
Previous Short Interest
7,025 shares
Change Vs. Previous Month
2,181.35%
Dollar Volume Sold Short
$1.21 million
Short Interest Ratio
0.0 Days to Cover
Last Record Date
December 31, 2025
Outstanding Shares
3,944,000 shares
Short Percent of Float
5.07%
Today's Trading Volume
25,155 shares
Average Trading Volume
602,475 shares
Today's Volume Vs. Average
4%
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Short Interest ChartDays to Cover ChartShort Percent of Float Chart

ATHA Short Interest Over Time

ATHA Days to Cover Over Time

ATHA Percentage of Float Shorted Over Time

Athira 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
12/31/2025160,265 shares $1.21 million +2,181.4%5.1%0.03 $7.57
12/15/20257,025 shares $27.05 thousand -12.7%0.2%0.44 $3.85
11/28/20258,045 shares $34.75 thousand -88.7%0.3%0.35 $4.32
11/14/202571,309 shares $322.32 thousand +7.5%2.3%2.56 $4.52
10/31/202566,316 shares $275.87 thousand -0.4%2.1%2.76 $4.16
10/15/202566,600 shares $247.09 thousand -27.8%1.8%2.4 $3.71
9/30/202592,300 shares $382.12 thousand -4.0%2.6%3.4 $4.14
9/15/202596,100 shares $369.12 thousand -88.6%2.8%3.7 $3.84
8/31/2025842,800 shares $327.51 thousand -5.9%2.5%4.5 $0.39
8/15/2025896,000 shares $359.03 thousand -5.2%2.7%1.6 $0.40
7/31/2025945,300 shares $359.21 thousand -8.2%2.8%1.7 $0.38
7/15/20251,030,000 shares $408.19 thousand -22.0%3.1%1.8 $0.40
6/30/20251,320,000 shares $398.64 thousand -10.8%3.9%2.3 $0.30
6/15/20251,480,000 shares $449.92 thousand +65.4%4.4%2.7 $0.30
5/31/2025894,900 shares $269.99 thousand +19.4%2.7%1.6 $0.30
5/15/2025749,800 shares $209.27 thousand -12.3%2.2%3.6 $0.28
4/30/2025855,100 shares $240.80 thousand +3.5%2.5%4.3 $0.28
4/15/2025826,600 shares $195.90 thousand -11.6%2.5%3.8 $0.24
3/31/2025934,500 shares $261.66 thousand -10.1%2.6%4.6 $0.28
3/15/20251,040,000 shares $348.71 thousand +17.3%2.9%4.6 $0.34
2/28/2025886,300 shares $364.00 thousand -0.2%2.5%3.7 $0.41
2/15/2025888,000 shares $415.58 thousand -6.5%2.5%3.4 $0.47
1/31/2025949,500 shares $498.77 thousand -30.7%2.7%2.1 $0.53
1/15/20251,370,000 shares $742.40 thousand +17.1%3.9%0.3 $0.54
12/31/20241,170,000 shares $686.44 thousand -17.6%3.3%0.3 $0.59
12/15/20241,420,000 shares $830.56 thousand -21.6%4.0%0.3 $0.58
11/30/20241,810,000 shares $1.19 million -18.5%5.1%0.4 $0.66
11/15/20242,220,000 shares $1.49 million +43.2%6.2%0.4 $0.67
10/31/20241,550,000 shares $663.56 thousand -0.6%4.4%0.3 $0.43
10/15/20241,560,000 shares $693.26 thousand -0.6%4.4%1.9 $0.44
9/30/20241,570,000 shares $700.22 thousand -4.9%4.4%2.1 $0.45
9/15/20241,650,000 shares $871.37 thousand +66.2%4.7%2.3 $0.53
8/31/2024992,900 shares $3.07 million +0.2%2.8%1.7 $3.09
8/15/2024990,700 shares $2.96 million +0.2%2.8%7.4 $2.99
7/31/2024989,200 shares $3.16 million -8.4%2.8%7.6 $3.19
7/15/20241,080,000 shares $3.63 million -1.8%3.1%7.5 $3.36
6/30/20241,100,000 shares $2.92 million +8.9%3.1%7 $2.65
6/15/20241,010,000 shares $2.57 million +13.6%2.9%5.8 $2.54
5/31/2024889,500 shares $2.33 million -3.7%2.5%3.4 $2.62
5/15/2024923,300 shares $2.04 million -12.1%2.6%3 $2.21
4/30/20241,050,000 shares $2.07 million +1.0%3.0%3.1 $1.97
4/15/20241,040,000 shares $2.14 million +3.0%2.9%2.9 $2.06
3/31/20241,010,000 shares $2.77 million +3.1%2.9%2.5 $2.74
3/15/2024979,300 shares $2.57 million +25.0%2.8%2.2 $2.62
2/29/2024783,600 shares $3.02 million +20.5%2.2%2 $3.85
2/15/2024650,300 shares $2.38 million -9.4%1.8%1.9 $3.66
1/31/2024717,600 shares $2.27 million +39.6%2.1%2.2 $3.17
1/15/2024513,900 shares $1.54 million +25.4%1.5%1.6 $3.00
12/31/2023409,900 shares $996.06 thousand -16.6%1.2%1.4 $2.43
12/15/2023491,600 shares $1.14 million -1.6%1.4%2.3 $2.31
11/30/2023499,600 shares $719.42 thousand +3.0%1.4%2.7 $1.44
11/15/2023484,900 shares $770.99 thousand -8.8%1.4%2.9 $1.59
10/31/2023531,500 shares $829.14 thousand -6.2%1.5%3.6 $1.56
10/15/2023566,700 shares $1.01 million -23.6%1.6%4 $1.79
9/30/2023741,900 shares $1.50 million -7.6%2.1%5.1 $2.02
9/15/2023803,300 shares $1.62 million -2.5%2.3%5.3 $2.02
8/31/2023823,500 shares $1.84 million -17.3%2.3%3.4 $2.23
8/15/2023996,000 shares $2.66 million -16.3%2.8%3.8 $2.67
7/31/20231,190,000 shares $3.47 million -3.3%3.4%4.7 $2.92
7/15/20231,230,000 shares $3.78 million +7.0%3.5%4.9 $3.07
6/30/20231,150,000 shares $3.39 million -46.0%3.3%4.4 $2.95
6/15/20232,130,000 shares $6.48 million +3.9%6.1%7.7 $3.04
5/31/20232,050,000 shares $5.68 million No Change5.8%9 $2.77
5/15/20232,050,000 shares $5.88 million -5.5%5.8%9.6 $2.87
4/30/20232,170,000 shares $6.05 million -1.8%6.4%9.6 $2.79
4/15/20232,210,000 shares $5.68 million -9.4%6.5%8.3 $2.57
3/31/20232,440,000 shares $6.10 million +8.4%6.8%7.7 $2.50
3/15/20232,250,000 shares $6.05 million +9.8%N/A6.9 $2.69
2/28/20232,050,000 shares $6.31 million +5.7%5.5%6.3 $3.08
2/15/20231,940,000 shares $6.44 million +4.9%5.2%5.9 $3.32
1/31/20231,850,000 shares $7.47 million +20.9%5.0%5.6 $4.04
1/15/20231,530,000 shares $5.89 million No Change4.1%4.8 $3.85
12/30/20221,530,000 shares $4.85 million -1.9%4.1%5.5 $3.17
12/15/20221,560,000 shares $4.96 million -4.3%N/A5.9 $3.18
11/30/20221,630,000 shares $5.07 million -3.0%N/A6.4 $3.11
11/15/20221,680,000 shares $5.29 million -6.2%N/A6.9 $3.15
10/31/20221,790,000 shares $5.92 million -2.2%N/A7 $3.31
10/15/20221,830,000 shares $5.87 million +0.6%5.1%5.9 $3.21
9/30/20221,820,000 shares $5.41 million -2.2%5.1%5.6 $2.97
9/15/20221,860,000 shares $6.64 million +3.3%5.2%3.3 $3.57
8/31/20221,800,000 shares $6.08 million -1.1%5.0%1.9 $3.38
8/15/20221,820,000 shares $7.10 million +2.8%5.1%1.9 $3.90
7/31/20221,770,000 shares $6.16 million -12.8%5.1%1.8 $3.48
7/15/20222,030,000 shares $6.98 million -27.2%5.9%2.2 $3.44
6/30/20222,790,000 shares $8.51 million -11.2%8.0%3.1 $3.05
6/15/20223,140,000 shares $25.81 million +6.8%9.0%4.1 $8.22
5/31/20222,940,000 shares $26.70 million +1.4%8.5%10.1 $9.08
5/15/20222,900,000 shares $24.01 million +7.4%8.3%10 $8.28
4/30/20222,700,000 shares $27.78 million +20.0%7.8%9.7 $10.29
4/15/20222,250,000 shares $26.46 million -1.3%6.5%7.8 $11.76
3/31/20222,280,000 shares $30.78 million -17.1%6.6%7.7 $13.50
3/15/20222,750,000 shares $26.57 million +13.2%8.0%10.3 $9.66
2/28/20222,430,000 shares $22.26 million +3.0%7.0%8.4 $9.16
2/15/20222,360,000 shares $24.00 million +18.6%6.8%7.5 $10.17
1/31/20221,990,000 shares $20.50 million -2.9%6.3%5.5 $10.30
1/15/20222,050,000 shares $22.65 million +0.5%6.0%5 $11.05
12/31/20212,040,000 shares $26.58 million +15.3%6.0%4.6 $13.03
12/15/20211,770,000 shares $22.97 million -9.2%5.2%4.1 $12.98
11/30/20211,950,000 shares $26.29 million +28.3%5.7%4.4 $13.48
11/15/20211,520,000 shares $23.85 million +29.9%4.4%3.6 $15.69
10/29/20211,170,000 shares $15.29 million +9.4%3.4%2.9 $13.07
10/15/20211,070,000 shares $10.23 million -6.1%3.2%2.9 $9.56
9/30/20211,140,000 shares $10.69 million -15.6%3.4%2.8 $9.38
9/15/20211,350,000 shares $13.62 million +20.5%4.0%2.4 $10.09
8/31/20211,120,000 shares $11.86 million -9.7%3.3%0.9 $10.59
8/13/20211,240,000 shares $12.19 million -6.1%3.6%1 $9.83
7/30/20211,320,000 shares $12.69 million No Change4.0%1.1 $9.61
7/15/20211,320,000 shares $13.09 million +9.1%4.0%1.1 $9.92
6/30/20211,210,000 shares $12.39 million -28.4%3.6%1.1 $10.24
6/15/20211,690,000 shares $31.65 million +21.6%5.1%1.7 $18.73
5/28/20211,390,000 shares $27.72 million +53.8%4.2%4.6 $19.94
5/14/2021904,000 shares $16.34 million +7.1%2.7%3.3 $18.08

ATHA Short Interest - Frequently Asked Questions

What is Athira Pharma's current short interest?

Short interest is the volume of Athira Pharma shares that have been sold short but have not yet been covered or closed out. As of December 31st, investors have sold 160,265 shares of ATHA short. 5.07% of Athira Pharma's shares are currently sold short. Learn More on Athira Pharma's current short interest.

What is a good short interest ratio for Athira Pharma?

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. ATHA shares currently have a short interest ratio of 0.0. Learn More on Athira Pharma's short interest ratio.

What is a good short interest percentage for Athira Pharma?

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. 5.07% of Athira Pharma's floating shares are currently sold short.

Is Athira Pharma's short interest increasing or decreasing?

Athira Pharma saw a increase in short interest in December. As of December 31st, there was short interest totaling 160,265 shares, an increase of 2,181.4% from the previous total of 7,025 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 Athira Pharma's short interest compare to its competitors?

5.07% of Athira Pharma's shares are currently sold short. Here is how the short interest of companies in the industry of "pharmaceutical products" compare to Athira Pharma: Innate Pharma S.A. Sponsored ADR (0.10%), Equillium, Inc. (6.39%), Biomea Fusion, Inc. (23.89%), Tharimmune, Inc. (2.86%), Aardvark Therapeutics, Inc. (5.29%), Cardiff Oncology, Inc. (29.04%), Verrica Pharmaceuticals Inc. (7.36%), InflaRx N.V. (2.99%), Assertio Holdings, Inc. (4.64%), vTv Therapeutics Inc. (2.99%),

Which stocks are the most shorted right now?

As of the most recent reporting period, the following stocks had the largest short interest positions: SPDR S&P 500 ETF Trust ($68.76 billion), Invesco QQQ ($26.44 billion), iShares Russell 2000 ETF ($19.85 billion), iShares 20+ Year Treasury Bond ETF ($12.46 billion), AppLovin Corporation ($10.57 billion), SPDR S&P Biotech ETF ($9.48 billion), Palo Alto Networks, Inc. ($8.67 billion), Carvana Co. ($6.81 billion), Western Digital Corporation ($6.35 billion), and iShares MSCI Emerging Markets ETF ($6.03 billion). View all of the most shorted stocks.

What does it mean to sell short Athira Pharma stock?

Short selling ATHA is an investing strategy that aims to generate trading profit from Athira Pharma as its price is falling. ATHA shares are trading down $0.28 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 Athira Pharma?

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

How often is Athira Pharma's 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 ATHA, twice per month. The most recent reporting period available is December, 31 2025.

What do ATHA's short interest metrics mean?

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

  • 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:ATHA) was last updated on 5/5/2026 by MarketBeat.com Staff.
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