How many insider trades does FilingIQ track for WAT?

FilingIQ tracks 782 Form 4 insider transactions for WAT (WATERS CORP /DE/), covering filings from Feb 26, 2015 onwards. 33 of those were filed in the last 90 days.

Are WAT insiders net buyers or net sellers?

Across the full Form 4 history for WAT, 4 transactions (1%) were open-market purchases and 172 (22%) were open-market sales. Compensatory awards and option exercises are filtered out of these counts.

Where does WAT insider data come from?

Every transaction shown on this page is sourced directly from SEC EDGAR Form 4 filings. FilingIQ parses the raw XML, normalises insider identity across reporting variations, and scores each trade on its multi-factor composite model.

What sector is WAT in?

WATERS CORP /DE/ (WAT) is classified in the Healthcare sector, specifically Diagnostics & Research, with a current market capitalisation of $32.24B.

WAT insider trading

NYSE Healthcare

WATERS CORP /DE/ — scored insider trade history from SEC Form 4 filings, parsed and contextualised by FilingIQ.

Total Form 4 trades

782

Last 90 days

Buys / sells

1% / 22%

Market cap

$32.24B

About WATERS CORP /DE/

Waters Corporation provides analytical workflow solutions in Asia, the Americas, and Europe. The company operates through two segments, Waters and TA. The company designs, manufactures, sells, and services liquid chromatography, as well as mass spectrometry (MS) technology systems and supports products, including chromatography columns, and other consumable products. It also designs, manufactures, sells, and services thermal analysis, rheometry, and calorimetry instruments for use in predicting the suitability and stability of fine chemicals, pharmaceuticals, water, polymers, metals, and viscous liquids for various industrial, consumer goods, and healthcare products, as well as for life science research; and develops and supplies software-based products that interface with its instruments, as well as other manufacturers' instruments. In addition, the company offers MS technology, which is used in drug discovery and development comprising clinical trial testing, the analysis of proteins in disease processes, nutritional safety analysis, and environmental testing. Its products are used by clinical, pharmaceutical, biochemical, industrial, nutritional safety, environmental, academic, and governmental customers working in research and development, quality assurance, and other laboratory applications. The company was founded in 1958 and is headquartered in Milford, Massachusetts.

Company website: www.waters.com

WAT insider activity at a glance

FilingIQ has scored 782 insider transactions for WAT since Feb 26, 2015. The most recent filing in our index is dated May 12, 2026.

Across the full history, 4 open-market purchases and 172 open-market sales were filed under transaction codes P and S respectively. Compensatory share awards (code A) and option exercises (code M) are tracked separately and not counted here.

The average FilingIQ composite score on WAT insider trades is 66.9/100, produced by FilingIQ's multi-factor Form 4 model. Model framework documented at methodology.

View live WAT trades on FilingIQ Raw filings on SEC EDGAR

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13F funds holding WAT

Motley Fool Asset Management LLC

$13.71M · 0.9% of AUM

Evelyn Partners Asset Management Ltd

$8.85M · 2.5% of AUM

Frequently asked

How many insider trades does FilingIQ track for WAT?: FilingIQ tracks 782 Form 4 insider transactions for WAT (WATERS CORP /DE/), covering filings from Feb 26, 2015 onwards. 33 of those were filed in the last 90 days.
Are WAT insiders net buyers or net sellers?: Across the full Form 4 history for WAT, 4 transactions (1%) were open-market purchases and 172 (22%) were open-market sales. Compensatory awards and option exercises are filtered out of these counts.
Where does WAT insider data come from?: Every transaction shown on this page is sourced directly from SEC EDGAR Form 4 filings. FilingIQ parses the raw XML, normalises insider identity across reporting variations, and scores each trade on its multi-factor composite model.
What sector is WAT in?: WATERS CORP /DE/ (WAT) is classified in the Healthcare sector, specifically Diagnostics & Research, with a current market capitalisation of $32.24B.

Methodology & sources

Every WAT insider transaction shown on FilingIQ is parsed directly from a public SEC Form 4 XML filing. Insider identity is normalised across reporting variants (CIK changes, name spellings, related-party indirect holdings). The FilingIQ composite score is documented in full on the team page and algo disclosure. Not investment advice; see disclaimer.