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Rhythm Pharmaceuticals (RYTM) Short Interest Ratio & Short Volume

Rhythm Pharmaceuticals logo
$91.42 +1.60 (+1.78%)
Closing price 04:00 PM Eastern
Extended Trading
$91.46 +0.04 (+0.04%)
As of 07:54 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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Rhythm Pharmaceuticals Short Interest Overview

As of May 15, 2026, Rhythm Pharmaceuticals (RYTM) had a short interest of 8.28 million shares sold short, representing 12.84% of the public float. This marks a 2.79% increase in short interest since the prior report. The short interest ratio (days to cover) is 8.3, meaning it would take 8.3 days of the average trading volume of 767,751 shares to cover all short positions.

Current Short Interest
8,282,367 shares
Previous Short Interest
8,057,652 shares
Change Vs. Previous Month
2.79%
Dollar Volume Sold Short
$749.72 million
Short Interest Ratio
8.3 Days to Cover
Last Record Date
May 15, 2026
Outstanding Shares
68,530,000 shares
Short Percent of Float
12.84%
Today's Trading Volume
495,683 shares
Average Trading Volume
767,751 shares
Today's Volume Vs. Average
65%
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Short Interest ChartDays to Cover ChartShort Percent of Float Chart

RYTM Short Interest Over Time

RYTM Days to Cover Over Time

RYTM Percentage of Float Shorted Over Time

Rhythm 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
5/15/20268,282,367 shares $749.72 million +2.8%12.8%8.28 $90.52
4/30/20268,057,652 shares $655.57 million +2.9%12.5%14.55 $81.36
4/15/20267,830,912 shares $687.63 million +2.7%12.2%12.81 $87.81
3/31/20267,624,913 shares $663.14 million +16.7%11.9%5.93 $86.97
3/13/20266,535,847 shares $571.10 million +3.4%10.2%7.59 $87.38
2/27/20266,321,762 shares $586.22 million +5.0%9.9%9.1 $92.73
2/13/20266,022,578 shares $590.63 million -3.5%9.6%7.9 $98.07
1/30/20266,237,463 shares $639.46 million -0.8%10.0%11.8 $102.52
1/15/20266,285,002 shares $666.59 million +1.4%10.0%9.87 $106.06
12/31/20256,200,378 shares $663.69 million +11.1%9.9%8.04 $107.04
12/15/20255,581,124 shares $627.99 million +1.1%8.9%4.98 $112.52
11/28/20255,518,605 shares $620.95 million +0.3%8.8%8.53 $112.52
11/14/20255,502,046 shares $546.96 million +5.2%8.8%7 $99.41
10/31/20255,230,596 shares $595.03 million -6.2%8.4%9.24 $113.76
10/15/20255,570,000 shares $609.08 million -0.2%8.9%9.5 $109.35
9/30/20255,580,000 shares $563.52 million +6.9%N/A8.8 $100.99
9/15/20255,220,000 shares $501.28 million +5.0%N/A7.2 $96.03
8/31/20254,970,000 shares $512.66 million +6.4%8.0%7 $103.15
8/15/20254,670,000 shares $455.84 million +3.6%N/A6.7 $97.61
7/31/20254,510,000 shares $384.39 million -5.9%7.2%6.3 $85.23
7/15/20254,790,000 shares $428.03 million -1.2%N/A6.5 $89.36
6/30/20254,850,000 shares $306.47 million +1.9%8.1%5.8 $63.19
6/15/20254,760,000 shares $299.40 million -0.4%8.0%6.7 $62.90
5/31/20254,780,000 shares $293.30 million -5.7%8.2%6.7 $61.36
5/15/20255,070,000 shares $305.11 million +4.5%8.7%6.9 $60.18
4/30/20254,850,000 shares $316.17 million -5.1%N/A7 $65.19
4/15/20255,110,000 shares $317.28 million +9.7%8.8%7.8 $62.09
3/31/20254,660,000 shares $246.84 million -1.1%8.0%7.4 $52.97
3/15/20254,710,000 shares $240.07 million -8.5%8.1%8.9 $50.97
2/28/20255,150,000 shares $282.78 million -4.8%8.9%9.8 $54.91
2/15/20255,410,000 shares $306.69 million +5.5%9.3%10.7 $56.69
1/31/20255,130,000 shares $304.88 million -5.9%N/A8.8 $59.43
1/15/20255,450,000 shares $292.45 million +3.4%N/A9.4 $53.66
12/31/20245,270,000 shares $295.01 million -9.3%N/A9.7 $55.98
12/15/20245,810,000 shares $320.94 million -8.8%N/A11.4 $55.24
11/30/20246,370,000 shares $395.19 million -5.1%N/A12.3 $62.04
11/15/20246,710,000 shares $377.30 million -19.7%N/A13.5 $56.23
10/31/20248,360,000 shares $399.02 million -1.2%N/A18.3 $47.73
10/15/20248,460,000 shares $426.47 million +2.8%N/A21.6 $50.41
9/30/20248,230,000 shares $431.17 million -11.9%N/A19.1 $52.39
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9/15/20249,340,000 shares $463.45 million -3.1%N/A20.1 $49.62
8/31/20249,640,000 shares $455.88 million -2.4%N/A20.5 $47.29
8/15/20249,880,000 shares $461.40 million -3.0%N/A20 $46.70
7/31/202410,180,000 shares $490.78 million +1.1%N/A19.7 $48.21
7/15/202410,070,000 shares $522.63 million +9.0%N/A18.3 $51.90
6/30/20249,240,000 shares $379.39 million -16.3%N/A16.9 $41.06
6/15/202411,040,000 shares $472.18 million +1.1%N/A19.8 $42.77
5/31/202410,920,000 shares $389.63 million +5.8%N/A19.7 $35.68
5/15/202410,320,000 shares $408.67 million -2.6%N/A18.7 $39.60
4/30/202410,590,000 shares $421.06 million +3.8%N/A17.5 $39.76
4/15/202410,200,000 shares $408.92 million +4.7%N/A17.1 $40.09
3/31/20249,740,000 shares $422.03 million +5.9%N/A15.4 $43.33
3/15/20249,200,000 shares $368 million +2.2%N/A13.7 $40.00
2/29/20249,000,000 shares $390.78 million +2.7%N/A12.3 $43.42
2/15/20248,760,000 shares $442.12 million -1.1%N/A11.7 $50.47
1/31/20248,860,000 shares $390.81 million +4.9%N/A11.6 $44.11
1/15/20248,450,000 shares $343.75 million +3.8%N/A11.7 $40.68
12/31/20238,140,000 shares $374.20 million -5.8%N/A11.5 $45.97
12/15/20238,640,000 shares $407.81 million -6.6%N/A13.2 $47.20
11/30/20239,250,000 shares $309.23 million -1.7%N/A15.2 $33.43
11/15/20239,410,000 shares $301.78 million -19.2%N/A16.5 $32.07
10/31/202311,650,000 shares $269.23 million -1.2%23.2%19.9 $23.11
10/15/202311,790,000 shares $294.51 million +16.9%23.6%17.3 $24.98
9/30/202310,090,000 shares $231.31 million -15.8%20.2%14.6 $22.93
9/15/202311,980,000 shares $299.02 million +12.5%24.0%16.8 $24.96
8/31/202310,650,000 shares $277.01 million -2.8%21.3%13.3 $26.01
8/15/202310,960,000 shares $287.04 million -11.7%22.0%13.7 $26.19
7/31/202312,410,000 shares $221.39 million +8.1%N/A16.1 $17.84
7/15/202311,480,000 shares $182.88 million +4.4%N/A16.2 $15.93
6/30/202311,000,000 shares $181.39 million +10.8%N/A15.4 $16.49
6/15/20239,930,000 shares $181.52 million +2.5%N/A13.6 $18.28
5/31/20239,690,000 shares $161.44 million +8.0%N/A15.2 $16.66
5/15/20238,970,000 shares $151.50 million +6.0%N/A12.7 $16.89
4/30/20238,460,000 shares $170.64 million +3.6%N/A12.7 $20.17
4/15/20238,170,000 shares $158.50 million +1.6%N/A13 $19.40
3/31/20238,040,000 shares $143.43 million +8.9%N/A12.5 $17.84
3/15/20237,380,000 shares $134.54 million -9.0%15.0%12.1 $18.23
2/28/20238,110,000 shares $197.15 million -0.4%16.6%13.2 $24.31
2/15/20238,140,000 shares $214.57 million +5.2%16.8%15 $26.36
1/31/20237,740,000 shares $211.69 million -2.4%16.0%12.9 $27.35
1/15/20237,930,000 shares $247.81 million +1.2%16.4%12.7 $31.25
12/30/20227,840,000 shares $228.30 million -3.1%16.2%12.5 $29.12
12/15/20228,090,000 shares $228.95 million +2.8%16.7%11.7 $28.30
11/30/20227,870,000 shares $210.68 million -6.8%16.3%7.9 $26.77
11/15/20228,440,000 shares $222.14 million +0.5%17.4%8 $26.32
10/31/20228,400,000 shares $211.43 million +10.2%17.4%7.4 $25.17
10/15/20227,620,000 shares $169.24 million -0.1%15.8%5.6 $22.21
9/30/20227,630,000 shares $186.94 million +26.5%16.1%3.1 $24.50
9/15/20226,030,000 shares $140.56 million +3.8%12.7%2.4 $23.31
8/31/20225,810,000 shares $131.31 million +3.8%13.4%2.3 $22.60
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8/15/20225,600,000 shares $148.12 million -22.7%13.0%2.3 $26.45
7/31/20227,240,000 shares $91.22 million +21.9%16.9%3.1 $12.60
7/15/20225,940,000 shares $59.46 million +87.4%13.8%2.8 $10.01
6/30/20223,170,000 shares $13.16 million -13.6%7.4%3.2 $4.15
6/15/20223,670,000 shares $12.66 million +2.2%8.5%4.2 $3.45
5/31/20223,590,000 shares $12.35 million +15.8%8.4%6.8 $3.44
5/15/20223,100,000 shares $10.04 million -9.4%7.2%5.8 $3.24
4/30/20223,420,000 shares $21.41 million -7.3%8.0%6.2 $6.26
4/15/20223,690,000 shares $32.66 million -1.6%8.6%6.6 $8.85
3/31/20223,750,000 shares $43.20 million -22.2%8.7%6.5 $11.52
3/15/20224,820,000 shares $47.09 million +5.7%11.2%8.7 $9.77
2/28/20224,560,000 shares $34.75 million +4.4%10.6%9 $7.62
2/15/20224,370,000 shares $29.67 million +5.6%10.2%9 $6.79
1/31/20224,140,000 shares $30.68 million +5.1%9.7%10.9 $7.41
1/15/20223,940,000 shares $35.58 million +1.0%9.2%11.4 $9.03
12/31/20213,900,000 shares $38.92 million +2.1%9.1%11.4 $9.98
12/15/20213,820,000 shares $38.89 million +3.0%8.9%11 $10.18
11/30/20213,710,000 shares $33.20 million -1.3%8.7%12.4 $8.95
11/15/20213,760,000 shares $49.74 million -3.8%8.8%13.4 $13.23
10/29/20213,910,000 shares $45.00 million +0.3%9.1%14.3 $11.51
10/15/20213,900,000 shares $44.11 million +4.8%9.1%13 $11.31
9/30/20213,720,000 shares $48.58 million -0.3%8.7%13 $13.06
9/15/20213,730,000 shares $46.92 million -9.7%8.7%11.6 $12.58
8/31/20214,130,000 shares $53.73 million -6.1%9.6%11.7 $13.01
8/13/20214,400,000 shares $60.98 million -7.6%10.3%11.8 $13.86
7/30/20214,760,000 shares $82.30 million +9.2%11.1%12.6 $17.29
7/15/20214,360,000 shares $82.45 million +15.3%10.3%13.1 $18.91
6/30/20213,780,000 shares $74.01 million -1.6%9.0%10.7 $19.58
6/15/20213,840,000 shares $82.56 million +11.6%9.1%11.2 $21.50
5/28/20213,440,000 shares $67.46 million -2.8%8.2%9.4 $19.61

RYTM Short Interest - Frequently Asked Questions

Short interest is the volume of Rhythm Pharmaceuticals shares that have been sold short but have not yet been covered or closed out. As of April 30th, investors have sold 8,057,652 shares of RYTM short. 12.49% of Rhythm Pharmaceuticals' shares are currently sold short. Learn More on Rhythm 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. RYTM shares currently have a short interest ratio of 14.6. Learn More on Rhythm 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. 12.49% of Rhythm Pharmaceuticals' floating shares are currently sold short.

Rhythm Pharmaceuticals saw a increase in short interest during the month of April. As of April 30th, there was short interest totaling 8,057,652 shares, an increase of 2.9% from the previous total of 7,830,912 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.

12.49% of Rhythm Pharmaceuticals' shares are currently sold short. Here is how the short interest of companies in the industry of "pharmaceutical products" compare to Rhythm Pharmaceuticals: Insmed, Inc. (6.93%), BioNTech SE Sponsored ADR (1.08%), Roivant Sciences Ltd. (4.24%), Moderna, Inc. (16.47%), Viatris Inc. (3.25%), Genmab A/S Sponsored ADR (1.38%), Ascendis Pharma A/S (7.57%), Regencell Bioscience Holdings Limited (0.16%), BridgeBio Pharma, Inc. (14.30%), Summit Therapeutics PLC (22.80%),

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 RYTM is an investing strategy that aims to generate trading profit from Rhythm Pharmaceuticals as its price is falling. RYTM shares are trading up $2.17 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 Rhythm 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 RYTM, 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 RYTM, 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 RYTM:

  • 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:RYTM) was last updated on 5/27/2026 by MarketBeat.com Staff.
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