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What happened with WAT today?

Why it moved
Explains possible causes using the day’s news and filings
Moving with the market?
Uses market moves and trading volume to assess what drove the change
What to watch next
The next thing that could change the call, and what to look for

No read yet

Uses news and trading volume to explain the day’s move and how it relates to the market.

Investment outlook

WAT in three months: buy, wait or sell?

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In the report
  • Buy / Wait / Sell rating
  • 3-month target price
  • Bear · Base · Bull
  • vs. the market

Company

Company overview

Waters helps laboratories determine what samples contain and assess materials’ properties and stability. Its liquid chromatography systems separate sample components, while mass spectrometry systems help identify and measure them. Customers buy the instruments, software and consumables, then pay for maintenance, repairs and support plans. Instruments already in use also generate demand for replacement chromatography columns; ACQUITY UPLC systems primarily use Waters’ own ACQUITY UPLC columns. Through TA, Waters sells equipment and services for testing how materials respond to heat and deformation.

The acquisition of BD’s Biosciences and Diagnostic Solutions businesses in February 2026 expanded Waters into specimen collection, disease testing and biological research. These businesses supply collection and transport products, diagnostic instruments and reagents, and tools for studying cells. Waters also relies on BD for transitional support services and manufacturing of certain products while replacing the acquired businesses’ former support infrastructure.

Before the acquisition, pharmaceutical customers supplied most sales, and analytical instruments, consumables and servicing accounted for the bulk of the business. Consumables and service bring continued sales after an instrument purchase, while new instrument orders depend partly on customers’ capital budgets and research funding.

Some operations are subject to FDA and equivalent overseas regulation, and products requiring clearance cannot reach the market without it. Acquisition-related tax agreements also temporarily restrict certain share transactions and business combinations.

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Source: SEC filing

Red flags

Know what’s buried in WAT’s filings before you buy

The risk section is the longest, dullest part of the filing. This keeps only what can really hurt you: where it hits, how hard, when it plays out.

Sorted into
  • Happening now
  • Could go wrong
  • Built in

Moat

WAT says it has a moat. Does it hold up?

Every company claims an edge. Each one is checked against hard numbers like margins and returns: which hold, and which line gives way first.

Each edge rated
  • Strong
  • Moderate
  • Limited
  • Unproven

Related companies

  • Competition
  • Shared drivers
  • Supplier
  • Customer

Waters’ results hinge on pharmaceutical laboratory spending and its expanded bioscience and diagnostics business, where Shimadzu and bioMérieux are important competitors to watch beyond this list.

  • Agilent competes with Waters for pharmaceutical and other analytical laboratories’ spending on instruments that separate and identify sample components—liquid chromatography and LC-MS—as well as consumables and maintenance. Watch its CrossLab consumables and services: Agilent can supply labs regardless of instrument brand and provide some services on Waters instruments.

  • Thermo Fisher competes with Waters for pharmaceutical and research laboratories’ purchases of analytical instruments, chromatography consumables and instrument services. Its ability to service some Waters instruments makes its service business worth watching, since instrument service and support accounted for over 35% of Waters’ sales in 2025.

  • Danaher challenges Waters in analytical instruments and chromatography consumables, and now also in the bioscience and diagnostics markets Waters entered through its acquisition of BD businesses. Watch Danaher’s Life Sciences and Diagnostics results for a view of competition in the research and testing products that now form part of Waters’ business.

  • Bruker competes with Waters for life-science, biopharmaceutical and industrial laboratories’ purchases of instruments that detect and measure samples. Watch Bruker’s new instruments and their performance and cost-effectiveness, which it identifies as key to winning those customers.

  • Revvity competes with Waters in instrument services and, following Waters’ acquisition of BD businesses, in products sold to research and diagnostic laboratories. Watch Revvity’s instruments and reagents for infectious-disease testing, an area also added to Waters by the acquisition.

  • Cytek Biosciences, Inc. competes with Waters’ newly acquired instruments and reagents for analyzing cells, known as flow cytometry, selling to drug companies, research institutions and clinical laboratories. Watch its recurring consumables revenue as its installed instrument base grows: the rivalry extends beyond equipment purchases to the supplies used with it.

  • Bio-Rad and Waters both depend on biological research and clinical diagnostics laboratories buying instruments and recurring reagents or consumables, with Waters’ exposure expanded by its acquisition of BD businesses. Bio-Rad’s Clinical Diagnostics sales offer a useful view of that customer spending; the segment accounted for approximately 60% of its consolidated net sales in 2025.

  • Mettler-Toledo and Waters both depend on laboratory equipment spending by pharmaceutical, chemical and food customers, selling instruments and related services for research, quality control and manufacturing. Watch Mettler-Toledo’s laboratory instruments and services sales, approximately 56% of its net sales in 2025, for a view of spending across these shared customer groups.

Agenda

tomorrowWed, Oct 21

  1. Time to be announced

    Danaher Corporation earningsDHR

    Danaher's Life Sciences and Diagnostics results will show how strong a competitor it is in research and testing markets Waters entered through the BD acquisition.

  2. Time to be announced

    Thermo Fisher Scientific, Inc. earningsTMO

    Thermo Fisher's service results will show how laboratories are spending on instrument support and how its ability to service some Waters instruments adds competition.

in 8 daysWed, Oct 28

  1. 2:00 PMET

    Fed Interest Rate Decision

    The Fed’s decision on its benchmark interest rate matters to Waters because higher borrowing rates could make refinancing its assumed $3.5 billion debt tranche more costly, increasing interest expense and reducing earnings and cash available for its instrument and service business.

in 14 daysTue, Nov 3

  1. Time to be announced
    Major

    Waters Corp earningsThis company

    Waters' report will show whether recurring revenue from chromatography consumables and instrument services keeps growing, and whether its operating margin holds.

in 15 daysWed, Nov 4

  1. Time to be announced

    Bio-Rad Laboratories, Inc. earningsBIO

    Bio-Rad's Clinical Diagnostics sales will offer a read on clinical-lab spending in a market relevant to Waters' expanded business.

in 34 daysMon, Nov 23

  1. Time to be announced

    Agilent Technologies Inc. earningsA

    Agilent's CrossLab consumables and services sales will show how laboratories are spending on support across instrument brands, and how Agilent competes with Waters for that business.