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Hyliion (HYLN) Short Interest Ratio & Short Volume

Hyliion logo
$4.01 +0.05 (+1.26%)
Closing price 09/29/2026 04:10 PM Eastern
Extended Trading
$4.00 -0.01 (-0.37%)
As of 04:00 AM 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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Hyliion Short Interest Overview

As of September 15, 2026, Hyliion (HYLN) had a short interest of 15.99 million shares sold short, representing 11.39% of the public float. This marks a -9.65% decrease in short interest since the prior report. The short interest ratio (days to cover) is 10.5, meaning it would take 10.5 days of the average trading volume of 1.71 million shares to cover all short positions.

Current Short Interest
15,990,447 shares
Previous Short Interest
17,697,586 shares
Change Vs. Previous Month
-9.65%
Dollar Volume Sold Short
$63.16 million
Short Interest Ratio
10.5 Days to Cover
Last Record Date
September 15, 2026
Outstanding Shares
178,600,000 shares
Short Percent of Float
11.39%
Today's Trading Volume
2,035,826 shares
Average Trading Volume
1,707,705 shares
Today's Volume Vs. Average
119%
Short Selling Hyliion?
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Short Interest ChartDays to Cover ChartShort Percent of Float Chart

HYLN Short Interest Over Time

HYLN Days to Cover Over Time

HYLN Percentage of Float Shorted Over Time

Hyliion 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
9/15/202615,990,447 shares $63.16 million -9.7%11.4%10.5 $3.95
8/31/202617,697,586 shares $61.41 million -0.7%12.6%7.4 $3.47
8/14/202617,826,174 shares $72.37 million +7.6%12.7%4.26 $4.06
7/31/202616,560,477 shares $58.96 million +9.5%11.8%5.92 $3.56
7/15/202615,120,944 shares $59.73 million +33.8%10.8%5.38 $3.95
6/30/202611,299,745 shares $58.87 million +6.3%8.1%1.79 $5.21
6/15/202610,627,659 shares $78.75 million +4.1%7.6%1.62 $7.41
5/29/202610,209,812 shares $71.37 million -21.6%7.3%1.25 $6.99
5/15/202613,028,206 shares $90.42 million -6.0%9.4%3.86 $6.94
4/30/202613,860,494 shares $38.25 million +2.2%10.0%18.88 $2.76
4/15/202613,569,273 shares $26.32 million +0.6%9.7%18.78 $1.94
3/31/202613,488,964 shares $23.74 million +1.7%9.6%12.69 $1.76
3/13/202613,257,897 shares $26.65 million -1.4%9.5%12.35 $2.01
2/27/202613,448,742 shares $27.57 million +3.5%9.6%12.69 $2.05
2/13/202612,997,046 shares $26.51 million +2.4%9.3%13.14 $2.04
1/30/202612,697,827 shares $26.03 million -11.3%9.1%15.2 $2.05
1/15/202614,320,476 shares $31.93 million -3.1%10.2%15.76 $2.23
12/31/202514,773,909 shares $27.18 million -5.6%10.5%11.64 $1.84
12/15/202515,648,292 shares $28.79 million -1.4%11.2%18.43 $1.84
11/28/202515,873,704 shares $29.70 million +0.0%11.3%13.48 $1.87
8/15/202517,150,000 shares $28.30 million -0.9%14.4%12.3 $1.65
7/31/202517,310,000 shares $25.97 million -0.2%14.6%9.1 $1.50
7/15/202517,340,000 shares $25.14 million -3.2%14.6%9.2 $1.45
6/30/202517,910,000 shares $23.64 million +0.5%15.2%9.7 $1.32
6/15/202517,830,000 shares $25.85 million -5.2%15.1%9.6 $1.45
5/31/202518,810,000 shares $28.97 million +15.0%16.0%10.1 $1.54
5/15/202516,360,000 shares $23.72 million +0.6%13.9%10.6 $1.45
4/30/202516,260,000 shares $24.55 million +3.9%13.8%17.8 $1.51
4/15/202515,650,000 shares $22.69 million -4.5%13.3%16.4 $1.45
3/31/202516,380,000 shares $22.93 million -2.9%13.9%15.9 $1.40
3/15/202516,860,000 shares $26.81 million +5.5%14.3%15.6 $1.59
2/28/202515,980,000 shares $27.01 million +0.1%13.6%14.3 $1.69
2/15/202515,960,000 shares $33.84 million +25.3%13.7%12.6 $2.12
1/31/202512,740,000 shares $29.94 million -2.8%10.8%9.2 $2.35
1/15/202513,110,000 shares $31.33 million -3.3%11.1%10 $2.39
12/31/202413,560,000 shares $35.39 million +1.7%11.5%10.7 $2.61
12/15/202413,330,000 shares $39.99 million +7.2%11.3%10.4 $3.00
11/30/202412,430,000 shares $45.87 million +2.9%10.5%10.3 $3.69
11/15/202412,080,000 shares $30.56 million +7.1%10.2%11.1 $2.53
10/31/202411,280,000 shares $26.96 million -3.3%9.4%13.9 $2.39
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10/15/202411,670,000 shares $29.00 million -0.2%9.8%13.6 $2.49
9/30/202411,690,000 shares $29.05 million +1.5%10.2%12.3 $2.49
9/15/202411,520,000 shares $24.19 million +1.4%10.1%13.7 $2.10
8/31/202411,360,000 shares $21.24 million +2.1%9.9%14.4 $1.87
8/15/202411,130,000 shares $22.09 million +13.2%9.7%14.3 $1.99
7/31/20249,830,000 shares $21.82 million +2.8%8.5%13 $2.22
7/15/20249,560,000 shares $22.75 million -6.1%8.3%13 $2.38
6/30/202410,180,000 shares $16.49 million -0.9%8.8%16.2 $1.62
6/15/202410,270,000 shares $14.89 million -5.0%8.9%14.9 $1.45
5/31/202410,810,000 shares $16.05 million -1.1%9.1%14.3 $1.49
5/15/202410,930,000 shares $17.32 million -6.0%9.2%12.3 $1.59
4/30/202411,630,000 shares $15.00 million +7.4%9.8%10.8 $1.29
4/15/202410,830,000 shares $14.30 million +15.8%8.7%9.5 $1.32
3/31/20249,350,000 shares $16.46 million +16.3%7.5%7.5 $1.76
3/15/20248,040,000 shares $12.94 million -1.1%6.5%5.9 $1.61
2/29/20248,130,000 shares $14.88 million -5.4%6.6%5.7 $1.83
2/15/20248,590,000 shares $13.19 million +3.1%6.9%5.9 $1.54
1/31/20248,330,000 shares $8.75 million +0.7%6.6%5.9 $1.05
1/15/20248,270,000 shares $7.68 million +2.9%6.6%5.7 $0.93
12/31/20238,040,000 shares $6.54 million +30.1%6.4%3.7 $0.81
12/15/20236,180,000 shares $4.02 million -9.9%4.9%2.9 $0.65
11/30/20236,860,000 shares $3.90 million -17.1%5.5%3.3 $0.57
11/15/20238,270,000 shares $5.10 million -11.0%6.6%4.1 $0.62
10/31/20239,290,000 shares $5.54 million -13.6%7.5%4.6 $0.60
10/15/202310,750,000 shares $7.86 million +6.9%8.6%5.2 $0.73
9/30/202310,060,000 shares $11.87 million -5.3%8.1%7.5 $1.18
9/15/202310,620,000 shares $12.64 million +1.2%8.5%7.7 $1.19
8/31/202310,490,000 shares $12.80 million -4.8%8.4%7.3 $1.22
8/15/202311,020,000 shares $13.61 million -0.1%8.8%7 $1.24
7/31/202311,030,000 shares $21.73 million -0.1%8.8%6.9 $1.97
7/15/202311,040,000 shares $21.75 million +0.5%9.4%6.6 $1.97
6/30/202310,990,000 shares $18.35 million -15.7%9.3%6.5 $1.67
6/15/202313,040,000 shares $25.30 million -6.7%11.8%7.4 $1.94
5/31/202313,980,000 shares $22.93 million -1.0%12.7%8.4 $1.64
5/15/202314,120,000 shares $24.85 million No Change12.8%8.8 $1.76
4/30/202314,120,000 shares $19.34 million +10.4%12.9%9.4 $1.37
4/15/202312,790,000 shares $19.82 million +12.1%11.7%9.4 $1.55
3/31/202311,410,000 shares $22.59 million +2.7%10.6%8.6 $1.98
3/15/202311,110,000 shares $26.22 million -0.6%10.3%9.3 $2.36
2/28/202311,180,000 shares $31.64 million +4.7%10.3%10.6 $2.83
2/15/202310,680,000 shares $38.13 million -4.3%9.8%10.6 $3.57
1/31/202311,160,000 shares $39.95 million -10.7%11.3%10.5 $3.58
1/15/202312,490,000 shares $38.22 million -4.8%11.5%12.1 $3.06
12/30/202213,120,000 shares $30.70 million -0.2%12.0%12.7 $2.34
12/15/202213,140,000 shares $34.82 million +1.9%12.1%13 $2.65
11/30/202212,900,000 shares $38.96 million -2.1%12.1%11.3 $3.02
11/15/202213,170,000 shares $40.83 million -5.2%12.3%10.6 $3.10
10/31/202213,890,000 shares $39.59 million No Change13.4%11.1 $2.85
10/15/202213,890,000 shares $33.20 million +1.5%12.7%10.8 $2.39
9/30/202213,680,000 shares $39.26 million -9.9%12.5%10.1 $2.87
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9/15/202215,190,000 shares $47.70 million +12.4%14.1%10 $3.14
8/31/202213,520,000 shares $47.46 million +2.0%12.5%8.9 $3.51
8/15/202213,260,000 shares $60.33 million -2.0%12.3%8.4 $4.55
7/31/202213,530,000 shares $53.17 million -1.7%12.6%7.7 $3.93
7/15/202213,770,000 shares $48.88 million -0.2%12.8%7.4 $3.55
6/30/202213,800,000 shares $44.44 million +6.1%12.8%7 $3.22
6/15/202213,010,000 shares $47.23 million -8.8%12.7%6.6 $3.63
5/31/202214,270,000 shares $51.80 million -3.1%13.9%6.8 $3.63
5/15/202214,730,000 shares $48.02 million -0.7%14.4%6.7 $3.26
4/30/202214,840,000 shares $47.64 million +5.2%14.5%6.5 $3.21
4/15/202214,110,000 shares $53.34 million +0.9%13.8%5.6 $3.78
3/31/202213,990,000 shares $61.98 million -6.6%13.7%5.2 $4.43
3/15/202214,980,000 shares $54.53 million -17.6%14.7%5.4 $3.64
2/28/202218,170,000 shares $78.49 million -0.3%17.8%6.5 $4.32
2/15/202218,230,000 shares $76.93 million -10.3%16.8%6.5 $4.22
1/31/202220,330,000 shares $90.47 million +5.3%18.8%6.8 $4.45
1/15/202219,310,000 shares $101.76 million +0.6%16.9%6.8 $5.27
12/31/202119,200,000 shares $119.04 million -9.3%16.8%6.7 $6.20
12/15/202121,170,000 shares $130.62 million -8.1%18.5%7.3 $6.17
11/30/202123,030,000 shares $152.69 million -0.6%20.6%8.4 $6.63
11/15/202123,170,000 shares $175.40 million -1.7%20.7%8.4 $7.57
10/29/202123,570,000 shares $190.68 million -3.9%21.2%8.5 $8.09
10/15/202124,530,000 shares $182.99 million +0.4%22.1%9.4 $7.46
9/30/202124,430,000 shares $205.21 million +0.5%22.0%9.4 $8.40

HYLN Short Interest - Frequently Asked Questions

Short interest is the volume of Hyliion shares that have been sold short but have not yet been closed out or covered. As of September 15th, investors have sold 15,990,447 shares of HYLN short. 11.39% of Hyliion's shares are currently sold short. Learn More on Hyliion's 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. HYLN shares currently have a short interest ratio of 10.5. Learn More on Hyliion'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. 11.39% of Hyliion's floating shares are currently sold short.

Hyliion saw a drop in short interest during the month of September. As of September 15th, there was short interest totaling 15,990,447 shares, a drop of 9.6% from the previous total of 17,697,586 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.

11.39% of Hyliion's shares are currently sold short. Here is how the short interest of companies in the industry of "electrical components & equipment" compare to Hyliion: Atkore Inc. (4.01%), Plug Power, Inc. (20.85%), SolarEdge Technologies, Inc. (19.55%), Preformed Line Products Company (4.52%), Allient Inc. (4.05%), Eos Energy Enterprises, Inc. (33.54%), FuelCell Energy, Inc. (32.94%), American Superconductor Corporation (8.42%), Shoals Technologies Group, Inc. (8.95%), Amprius Technologies, Inc. (16.88%),

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 HYLN is an investing strategy that aims to generate trading profit from Hyliion as its price is falling. HYLN shares are trading up $0.05 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 Hyliion 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 HYLN, 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 HYLN, 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 HYLN:

  • 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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Short Interest Tools

Short interest data for NYSEAMERICAN:HYLN 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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