Free Trial
Tada emoji MarketBeat All Access — Now Just $5.00 for 5 Weeks

Thermo Fisher Scientific (TMO) Short Interest Ratio & Short Volume

Thermo Fisher Scientific logo
$494.82 -3.47 (-0.70%)
Closing price 03:59 PM Eastern
Extended Trading
$494.89 +0.07 (+0.01%)
As of 04:22 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.
Compare

Thermo Fisher Scientific Short Interest Data

Thermo Fisher Scientific (TMO) has a short interest of 3.71 million shares, representing 0.98% of the float (the number of shares available for trading by the public). This marks a -3.13% decrease in short interest from the previous month. The short interest ratio (days to cover) is 1.3, indicating that it would take 1.3 days of the average trading volume of 2.49 million shares to cover all short positions.

Current Short Interest
3,710,000 shares
Previous Short Interest
3,830,000 shares
Change Vs. Previous Month
-3.13%
Dollar Volume Sold Short
$1.73 billion
Short Interest Ratio
1.3 Days to Cover
Last Record Date
July 31, 2025
Outstanding Shares
377,610,000 shares
Float Size
376,980,000 shares
Short Percent of Float
0.98%
Today's Trading Volume
2,344,827 shares
Average Trading Volume
2,492,697 shares
Today's Volume Vs. Average
94%
Short Selling Thermo Fisher Scientific?
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 Thermo Fisher Scientific and its competitors with MarketBeat's FREE newsletter.

Skip Charts & View Short Interest History
Short Interest ChartDays to Cover ChartShort Percent of Float Chart

TMO Short Interest Over Time

TMO Days to Cover Over Time

TMO Percentage of Float Shorted Over Time

Thermo Fisher Scientific Short Interest History

Export to Excel
Report DateTotal Shares Sold ShortDollar Volume Sold ShortChange from Previous ReportPercentage of Float ShortedDays to CoverPrice on Report Date
7/31/20253,710,000 shares $1.73 billion -3.1%1.0%1.3 $467.56
7/15/20253,830,000 shares $1.60 billion -13.2%1.0%1.3 $418.32
6/30/20254,410,000 shares $1.79 billion -10.2%1.2%1.6 $405.83
6/15/20254,910,000 shares $1.97 billion +3.6%1.3%1.8 $402.12
5/31/20254,740,000 shares $1.91 billion +3.7%1.3%1.9 $402.41
5/15/20254,570,000 shares $1.85 billion +0.7%1.2%1.9 $404.27
4/30/20254,540,000 shares $1.95 billion -5.2%1.2%1.9 $428.48
4/15/20254,790,000 shares $2.11 billion +21.6%1.3%2.2 $440.91
3/31/20253,940,000 shares $1.96 billion -7.7%1.1%1.9 $498.05
3/15/20254,270,000 shares $2.24 billion +2.9%1.1%2.3 $523.44
2/28/20254,150,000 shares $2.20 billion +7.5%1.1%2.1 $528.99
2/15/20253,860,000 shares $2.06 billion -2.3%1.0%1.9 $532.58
1/31/20253,950,000 shares $2.36 billion +14.2%1.0%1.9 $598.40
1/15/20253,460,000 shares $1.91 billion -1.7%0.9%1.8 $551.64
12/31/20243,520,000 shares $1.83 billion -11.1%0.9%2 $520.23
12/15/20243,960,000 shares $2.09 billion +11.9%1.0%2.3 $526.89
11/30/20243,540,000 shares $1.87 billion +9.6%0.9%2.2 $529.63
11/15/20243,230,000 shares $1.66 billion +10.2%0.9%2.2 $513.08
10/31/20242,930,000 shares $1.60 billion -3.9%0.8%2.4 $546.55
10/15/20243,050,000 shares $1.83 billion -11.6%0.8%2.3 $600.52
9/30/20243,450,000 shares $2.13 billion -13.5%0.9%2.6 $618.57
9/15/20243,990,000 shares $2.44 billion +12.7%1.1%2.7 $611.17
8/31/20243,540,000 shares $2.18 billion +6.6%0.9%2.3 $615.07
8/15/20243,320,000 shares $2.00 billion -7.3%0.9%2.1 $603.69
7/31/20243,580,000 shares $2.20 billion +17.8%0.9%2.3 $613.34
7/15/20243,040,000 shares $1.65 billion -10.3%0.8%2 $544.30
6/30/20243,390,000 shares $1.87 billion +6.3%0.9%2.3 $553.00
6/15/20243,190,000 shares $1.82 billion -1.5%0.8%2.3 $572.05
5/31/20243,240,000 shares $1.84 billion +15.7%0.9%2.4 $567.98
5/15/20242,800,000 shares $1.68 billion +1.1%0.7%2.1 $599.02
4/30/20242,770,000 shares $1.58 billion +7.0%0.7%2 $568.74
4/15/20242,590,000 shares $1.44 billion +0.4%0.7%1.8 $557.87
3/31/20242,580,000 shares $1.50 billion -24.8%0.7%1.7 $581.21
3/15/20243,430,000 shares $2.00 billion +16.7%0.9%2.2 $584.15
2/29/20242,940,000 shares $1.67 billion +1.0%0.8%1.7 $569.25
2/15/20242,910,000 shares $1.60 billion +1.0%0.8%1.7 $548.57
1/31/20242,880,000 shares $1.55 billion -1.4%0.8%1.6 $538.93
1/15/20242,920,000 shares $1.59 billion -0.3%0.8%1.5 $544.32
12/31/20232,930,000 shares $1.56 billion +0.7%0.8%1.5 $530.79
12/15/20232,910,000 shares $1.51 billion +16.4%0.8%1.6 $518.40
Washington Thinks They Own Your Bank Account (Ad)

What If Washington Declared That: YOUR Money ISN'T Actually Yours? Sounds insane, but that's exactly what the Department of Justice just admitted in court—claiming cash isn't legally your property. What does that mean? It means Washington thinks they can seize, freeze, or drain your accounts—whenever they want.tc pixel

Get your free guide now by clicking here >>
11/30/20232,500,000 shares $1.24 billion -8.1%0.7%1.4 $495.76
11/15/20232,720,000 shares $1.28 billion -1.1%0.7%1.5 $470.59
10/31/20232,750,000 shares $1.22 billion +0.4%0.7%1.7 $444.85
10/15/20232,740,000 shares $1.32 billion +13.7%0.7%1.9 $482.85
9/30/20232,410,000 shares $1.22 billion -13.0%0.6%1.7 $506.17
9/15/20232,770,000 shares $1.43 billion +6.1%0.7%1.9 $515.42
8/31/20232,610,000 shares $1.45 billion +2.0%0.7%1.8 $557.10
8/15/20232,560,000 shares $1.37 billion -15.8%0.7%1.6 $534.40
7/31/20233,040,000 shares $1.67 billion +11.4%0.8%1.8 $548.66
7/15/20232,730,000 shares $1.45 billion -2.5%0.7%1.6 $529.36
6/30/20232,800,000 shares $1.46 billion +1.5%0.7%1.8 $521.38
6/15/20232,760,000 shares $1.48 billion -11.3%0.7%1.8 $535.11
5/31/20233,110,000 shares $1.58 billion +3.3%0.8%2.1 $508.46
5/15/20233,010,000 shares $1.58 billion -1.6%0.8%2.3 $523.68
4/30/20233,060,000 shares $1.70 billion +3.7%0.8%2.5 $554.90
4/15/20232,950,000 shares $1.74 billion -3.0%0.8%2.4 $588.84
3/31/20233,040,000 shares $1.75 billion +5.6%0.8%2.3 $576.37
3/15/20232,880,000 shares $1.56 billion +15.2%0.8%2.1 $542.70
2/28/20232,500,000 shares $1.35 billion -5.7%0.7%1.7 $541.76
2/15/20232,650,000 shares $1.50 billion +12.3%0.7%1.8 $566.83
1/31/20232,360,000 shares $1.35 billion -22.6%0.6%1.5 $570.33
1/15/20233,050,000 shares $1.78 billion +8.2%0.8%1.8 $583.84
12/30/20222,820,000 shares $1.55 billion -7.2%0.7%1.7 $550.69
12/15/20223,040,000 shares $1.68 billion +5.9%0.8%1.9 $553.79
11/30/20222,870,000 shares $1.61 billion -3.7%0.7%1.9 $560.22
11/15/20222,980,000 shares $1.63 billion +2.1%0.8%2 $546.09
10/31/20222,920,000 shares $1.50 billion -3.3%0.8%2.1 $513.97
10/15/20223,020,000 shares $1.52 billion +4.9%0.8%2.4 $503.05
9/30/20222,880,000 shares $1.46 billion -8.3%0.7%2.3 $507.19
9/15/20223,140,000 shares $1.73 billion +18.9%0.8%2.7 $551.98
8/31/20222,640,000 shares $1.44 billion -6.4%0.7%2.2 $545.32
8/15/20222,820,000 shares $1.70 billion +6.0%0.7%2.3 $604.49
7/31/20222,660,000 shares $1.59 billion -3.3%0.7%2 $598.41
7/15/20222,750,000 shares $1.48 billion -6.8%0.7%1.9 $538.87
6/30/20222,950,000 shares $1.60 billion +13.5%N/A2.1 $543.28
6/15/20222,600,000 shares $1.34 billion -14.5%N/A1.8 $514.76
5/31/20223,040,000 shares $1.73 billion -7.9%0.8%2.1 $567.57
5/15/20223,300,000 shares $1.79 billion -2.7%0.8%2.2 $541.42
4/30/20223,390,000 shares $1.87 billion +39.5%0.9%2.2 $552.92
4/15/20222,430,000 shares $1.38 billion -13.5%0.6%1.6 $568.90
3/31/20222,810,000 shares $1.66 billion +4.5%0.7%1.7 $590.65
3/15/20222,690,000 shares $1.48 billion +0.4%0.7%1.7 $550.64
2/28/20222,680,000 shares $1.46 billion +3.5%0.7%1.7 $544.00
2/15/20222,590,000 shares $1.44 billion +7.5%N/A1.6 $556.67
1/31/20222,410,000 shares $1.40 billion -11.4%N/A1.6 $581.30
1/15/20222,720,000 shares $1.62 billion +7.9%N/A1.8 $594.80
12/31/20212,520,000 shares $1.68 billion -7.4%N/A1.9 $667.24
12/15/20212,720,000 shares $1.78 billion -2.5%N/A2.1 $655.74
11/30/20212,790,000 shares $1.77 billion +6.1%N/A2 $632.83
11/15/20212,630,000 shares $1.66 billion +7.4%N/A2.1 $632.36
Washington Thinks They Own Your Bank Account (Ad)

What If Washington Declared That: YOUR Money ISN'T Actually Yours? Sounds insane, but that's exactly what the Department of Justice just admitted in court—claiming cash isn't legally your property. What does that mean? It means Washington thinks they can seize, freeze, or drain your accounts—whenever they want.tc pixel

Get your free guide now by clicking here >>
10/29/20212,450,000 shares $1.55 billion -5.8%N/A2 $633.07
10/15/20212,600,000 shares $1.51 billion +1.2%0.7%2.2 $582.39
9/30/20212,570,000 shares $1.47 billion -0.8%0.7%2.2 $571.33
9/15/20212,590,000 shares $1.46 billion -3.7%0.7%2.1 $562.96
8/31/20212,690,000 shares $1.49 billion -5.0%0.7%2.2 $554.95
8/13/20212,830,000 shares $1.54 billion -4.4%0.7%1.9 $544.64
7/30/20212,960,000 shares $1.60 billion -1.3%0.8%1.9 $540.01
7/15/20213,000,000 shares $1.54 billion -1.6%0.8%1.8 $514.48
6/30/20213,050,000 shares $1.54 billion +8.5%0.8%1.7 $504.47
6/15/20212,810,000 shares $1.32 billion -13.0%0.7%1.6 $470.08
5/28/20213,230,000 shares $1.52 billion -8.2%0.8%1.8 $469.50
5/14/20213,520,000 shares $1.61 billion +10.3%0.9%2.1 $456.92
4/30/20213,190,000 shares $1.48 billion -1.5%0.8%1.8 $464.39
4/15/20213,240,000 shares $1.55 billion +19.1%0.8%1.8 $478.04
3/31/20212,720,000 shares $1.23 billion -13.4%0.7%1.5 $451.47
3/15/20213,140,000 shares $1.41 billion +14.2%0.8%1.8 $450.49
2/26/20212,750,000 shares $1.24 billion -3.5%0.7%1.6 $451.47
2/12/20212,850,000 shares $1.41 billion -3.4%0.7%1.6 $494.05
1/29/20212,950,000 shares $1.46 billion +17.5%0.8%1.6 $496.48
1/15/20212,510,000 shares $1.25 billion -9.1%0.6%1.4 $496.91
12/31/20202,760,000 shares $1.27 billion +17.5%0.7%1.6 $461.73
12/15/20202,350,000 shares $1.10 billion -6.0%0.6%1.5 $467.13
11/30/20202,500,000 shares $1.13 billion +7.8%0.6%1.6 $453.40
11/15/20202,320,000 shares $1.13 billion -2.5%0.6%1.5 $488.59
10/30/20202,380,000 shares $1.12 billion +7.7%0.6%1.7 $471.88
10/15/20202,210,000 shares $1.03 billion -6.8%0.6%1.8 $467.01
9/30/20202,370,000 shares $1.05 billion -23.1%0.6%1.9 $441.52
9/15/20203,080,000 shares $1.34 billion +21.7%0.8%2.4 $435.10
8/31/20202,530,000 shares $1.09 billion -3.4%0.6%1.9 $428.98

TMO Short Interest - Frequently Asked Questions

What is Thermo Fisher Scientific's current short interest?

Short interest is the volume of Thermo Fisher Scientific shares that have been sold short but have not yet been closed out or covered. As of July 31st, traders have sold 3,710,000 shares of TMO short. 0.98% of Thermo Fisher Scientific's shares are currently sold short. Learn More on Thermo Fisher Scientific's current short interest.

What is a good short interest ratio for Thermo Fisher Scientific?

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. TMO shares currently have a short interest ratio of 1.0. Learn More on Thermo Fisher Scientific's short interest ratio.

Which institutional investors are shorting Thermo Fisher Scientific?

As of the most recent reporting period, the following institutional investors, funds, and major shareholders have reported short positions of Thermo Fisher Scientific: Marex Group plc, Hudson Bay Capital Management LP, Man Group plc, LMR Partners LLP, Hudson Bay Capital Management LP, Group One Trading LLC, Cubist Systematic Strategies LLC, BNP Paribas Financial Markets, Balyasny Asset Management L.P., Bank of America Corp DE, Jane Street Group LLC, Volterra Technologies LP, Squarepoint Ops LLC, Alphadyne Asset Management LP, Qube Research & Technologies Ltd, Maven Securities LTD, Capula Management Ltd, Marshall Wace LLP, Walleye Capital LLC, Walleye Trading LLC, Lido Advisors LLC, Hsbc Holdings PLC, Capital Fund Management S.A., Jefferies Financial Group Inc., Eisler Capital Management Ltd., JPMorgan Chase & Co., Citigroup Inc., SG Americas Securities LLC, Calamos Advisors LLC, Wolverine Asset Management LLC, Allianz Asset Management GmbH, Twin Tree Management LP, Baader Bank Aktiengesellschaft, and Quaker Wealth Management LLC. These positions are disclosed in Form 13F filings with the Securities and Exchange Commission.

What is a good short interest percentage for Thermo Fisher Scientific?

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. 0.98% of Thermo Fisher Scientific's floating shares are currently sold short.

Is Thermo Fisher Scientific's short interest increasing or decreasing?

Thermo Fisher Scientific saw a drop in short interest in the month of July. As of July 31st, there was short interest totaling 3,710,000 shares, a drop of 3.1% from the previous total of 3,830,000 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.

What is Thermo Fisher Scientific's float size?

Thermo Fisher Scientific currently has issued a total of 377,610,000 shares. Some of Thermo Fisher Scientific's outstanding shares are available for trading, while others are subject to various restrictions. The public float, also referred to as floating shares or "the float", are shares that publicly owned, unrestricted and available to trade on the open market. Thermo Fisher Scientific currently has a public float of 376,980,000 shares.

How does Thermo Fisher Scientific's short interest compare to its competitors?

0.98% of Thermo Fisher Scientific's shares are currently sold short. Here is how the short interest of companies compare to Thermo Fisher Scientific: Medpace Holdings, Inc. (11.01%), Agilent Technologies, Inc. (1.08%), AMN Healthcare Services Inc (10.06%), Danaher Corporation (1.30%), Haemonetics Corporation (6.48%), McKesson Corporation (1.52%), Qiagen N.V. (3.07%), West Pharmaceutical Services, Inc. (3.04%), Mettler-Toledo International, Inc. (3.33%), Waters Corporation (4.01%),

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 ($70.87 billion), Invesco QQQ ($30.12 billion), iShares Russell 2000 ETF ($19.85 billion), iShares 20+ Year Treasury Bond ETF ($10.34 billion), MicroStrategy Incorporated ($8.98 billion), iShares iBoxx $ Investment Grade Corporate Bond ETF ($7.61 billion), SPDR S&P Biotech ETF ($6.81 billion), Invesco S&P 500 Equal Weight ETF ($6.14 billion), Palo Alto Networks, Inc. ($5.97 billion), and Super Micro Computer, Inc. ($5.28 billion). View all of the most shorted stocks.

What does it mean to sell short Thermo Fisher Scientific stock?

Short selling TMO is an investing strategy that aims to generate trading profit from Thermo Fisher Scientific as its price is falling. TMO shares are trading down $3.80 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 Thermo Fisher Scientific?

A short squeeze for Thermo Fisher Scientific 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 TMO, which in turn drives the price of the stock up even further.

How often is Thermo Fisher Scientific'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 TMO, twice per month. The most recent reporting period available is July, 31 2025.



Related Companies
Short Interest Tools

This page (NYSE:TMO) was last updated on 8/20/2025 by MarketBeat.com Staff
From Our Partners
Washington Thinks They Own Your Bank Account
What If Washington Declared That: YOUR Money ISN'T Actually Yours? Sounds insane, but that's exactly what ...
Priority Gold | Sponsoredtc pixel
Silver’s Still Under $35… For Now.
Silver is trading around $33—but insiders are betting on a $70 breakout by year’s end. With supply shrinkin...
GoldenCrest Metals | Sponsoredtc pixel
What Steve Bannon revealed about Trump’s gold play
A Trump advisor just said 3 words that could reset the dollar. It’s a gold move nobody saw coming—and your ...
Reagan Gold Group | Sponsoredtc pixel
Musk’s Project Colossus could mint millionaires
I predict this single breakthrough could make Elon the world’s first trillionaire — and mint more new milliona...
Brownstone Research | Sponsoredtc pixel
Altucher: It Looks Like My Trump prediction is coming true
New Hampshire just launched a Strategic Crypto Reserve — and James Altucher says it’s the first sign that “Tru...
Paradigm Press | Sponsoredtc pixel
Trump’s national nightmare is here
Porter Stansberry and Jeff Brown say a new U.S. national emergency is already underway — and it could trigger ...
Porter & Company | Sponsoredtc pixel
"I'm risking my reputation on this"
A massive supply shock is building in the crypto market that could send Bitcoin to $300,000 this year. That...
Crypto 101 Media | Sponsoredtc pixel
Tax Drain Deadline: Protect Your Wealth Before September 15th
On September 15th, the IRS collects another round of quarterly tax payments—targeting self-employed profession...
American Alternative | Sponsoredtc pixel