What SEC filings does Waters Corporation submit to the SEC?

Waters Corporation (WAT) submits several types of SEC filings including Form 4 (insider transactions), Form 144 (proposed insider sales), 8-K reports (material events such as earnings releases, acquisitions, leadership changes), and periodic reports — the 10-Q (quarterly) and 10-K (annual). All filings are publicly available through SEC EDGAR.

What does a Form 4 filing tell me about WAT?

A Form 4 for WAT discloses a transaction by a company insider — typically a director, officer, or 10%+ shareholder. It shows the source-reported date, number of shares, price, and updated ownership. These facts do not establish motive or predict future returns.

How do I interpret an 8-K filing from Waters Corporation?

An 8-K signals a material event requiring prompt disclosure. Common triggers include earnings pre-announcements, acquisitions, leadership appointments or departures, credit changes, or regulatory actions. Read the item codes inside the filing to understand exactly what was disclosed before drawing conclusions.

What is the difference between a 10-K and 10-Q for WAT?

The 10-K is Waters Corporation's annual report with fully audited financial statements, comprehensive MD&A, and complete risk factor disclosures — filed 60–90 days after fiscal year-end. The 10-Q is a lighter quarterly report with unaudited financials filed for the first three quarters. Together they provide a continuous financial picture of the company.

Where can I see all WAT SEC filings directly on EDGAR?

You can view all historical Waters Corporation filings on the SEC EDGAR company page for WAT. Each filing card on this page links directly to the original SEC document.

How often does Waters Corporation file with the SEC?

Waters Corporation files one 10-K per year and up to three 10-Qs per year. Form 4 insider transactions must be reported within two business days of each trade, so the frequency depends on how often insiders are buying or selling WAT shares. 8-K filings occur whenever a material event happens — which can be several times per quarter for an active company.

WAT SEC Filing News — Waters Corporation

Latest SEC filings for Waters Corporation (WAT) explained in plain English. Covers insider buying and selling (Form 4), proposed insider sales (Form 144), material company events (8-K), and quarterly & annual reports (10-Q / 10-K). StrongBuyAnalytics provides navigation and brief excerpts or summaries; original filings remain at the SEC/source links and were authored by their filers, not StrongBuyAnalytics. Filing dates shown are source dates. Coverage and detection can be delayed or incomplete because of SEC availability, amendments, parsing, caching, or outages. Latest source filing date shown: 2026-10-02.

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 …

Sector: Healthcare Industry: Diagnostics & Research Market Cap: $42.6B

Total Filings

Bullish Classifications

Bearish Classifications

Insider Transactions

Material Events (8-K)

Periodic Reports

What you're looking at: Each item below is parsed from an actual SEC filing submitted by Waters Corporation. Form 4 = confirmed insider transaction · Form 144 = proposed sale notice · 8-K = material event (earnings, M&A, leadership change, etc.) · 10-Q / 10-K = quarterly / annual report.

WAT Filing Activity Snapshot 2026-03-16 — 2026-10-02

Insider Transactions (Form 4)

1 buy vs 1 sell

Insider buying and selling activity is balanced in this period.

Largest Form 144 Filing

$1.44M

KUEBLER CHRISTOPHER A (Director) · 2026-08-07

3,626 shares · Form 4

Form 144 Notices

Proposed insider sale filed — Form 144 is a notice of intent, not a confirmed transaction. Actual sales are confirmed via Form 4.

Insider Transactions 11 · Forms 3, 4 and 5

A Form 4 is filed within two business days of a company insider — an officer, a director, or a holder of more than ten percent of the stock — changing their position in the shares. All 11 filings in this group are Form 4s for Waters Corporation.

The difficulty with reading these filings as a group is that a single form type covers transactions that mean entirely different things. An executive spending their own money to buy stock and an executive having shares withheld to pay tax on a vesting grant both appear as a Form 4. Every filing below is therefore tagged with the nature of the underlying transaction, taken from the transaction code reported on the form itself.

Across the 11 insider filings shown, the breakdown is 6 compensation award, 3 tax withholding, 1 open-market purchase and 1 open-market sale. 2 of them involved a discretionary open-market trade; the rest are compensation and administrative mechanics.

What each transaction type means

Compensation award ×6: Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.
Tax withholding ×3: Shares were withheld by the company to settle tax due when equity vested. This is an automatic administrative step and not a decision to sell.
Open-market purchase ×1: The insider bought shares on the open market with their own money. This is the only Form 4 category that requires a discretionary cash outlay at the prevailing price.
Open-market sale ×1: The insider sold shares on the open market. Sales may be discretionary or executed automatically under a pre-arranged Rule 10b5-1 trading plan, and a Form 4 does not always make clear which applies.

Form 4 Compensation award Tax / Compensation Filing 2026-10-02

WAT insider Form 4 filed for equity award, exercise, or tax withholding

Knight Heather (Director) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`A`	Compensation award	57	—	—

Filing: Form 4 (Insider Transaction) Insider: Knight Heather (Director) Shares: 57

View on SEC EDGAR → Open Filing Document →

Form 4 Compensation award Tax / Compensation Filing 2026-10-02

WAT insider Form 4 filed for equity award, exercise, or tax withholding

Jiang Wei (Director) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`A`	Compensation award	57	—	—

Filing: Form 4 (Insider Transaction) Insider: Jiang Wei (Director) Shares: 57

View on SEC EDGAR → Open Filing Document →

Form 4 Open-market sale Insider Selling 2026-08-07

WAT insider KUEBLER CHRISTOPHER A (Director) sold 3,626 shares (~$1.44M)

KUEBLER CHRISTOPHER A, listed as Director at WATERS CORP /DE/, reported an open-market sale of 3,626 WAT shares in a Form 4 filing. This is a confirmed insider sale, not just a proposed sale notice.

The insider sold shares on the open market. Sales may be discretionary or executed automatically under a pre-arranged Rule 10b5-1 trading plan, and a Form 4 does not always make clear which applies.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`M`	Option exercise	3,626	$136.43	$494.7K
`S`	Open-market sale	3,626	$397.94	$1.44M
`M`	Option exercise derivative · Stock Option (Right to Buy)	3,626	—	—

Filing: Form 4 (Insider Transaction) Insider: KUEBLER CHRISTOPHER A (Director) Shares: 3,626 Est. Value: $1.44M

View on SEC EDGAR → Open Filing Document →

Form 4 Compensation award Tax / Compensation Filing 2026-07-02

WAT insider Form 4 filed for equity award, exercise, or tax withholding

Knight Heather (Director) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`A`	Compensation award	63	—	—

Filing: Form 4 (Insider Transaction) Insider: Knight Heather (Director) Shares: 63

View on SEC EDGAR → Open Filing Document →

Form 4 Compensation award Tax / Compensation Filing 2026-07-02

WAT insider Form 4 filed for equity award, exercise, or tax withholding

Jiang Wei (Director) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`A`	Compensation award	67	—	—

Filing: Form 4 (Insider Transaction) Insider: Jiang Wei (Director) Shares: 67

View on SEC EDGAR → Open Filing Document →

Form 4 Tax withholding Tax / Compensation Filing 2026-06-25

WAT insider Form 4 filed for equity award, exercise, or tax withholding

Carpio Robert L III (SVP Waters Analytical Sciences) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Shares were withheld by the company to settle tax due when equity vested. This is an automatic administrative step and not a decision to sell.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`F`	Tax withholding on vested shares	189	$369.18	$69.8K

Filing: Form 4 (Insider Transaction) Insider: Carpio Robert L III (SVP Waters Analytical Sciences) Shares: 189

View on SEC EDGAR → Open Filing Document →

Form 4 Tax withholding Tax / Compensation Filing 2026-05-14

WAT insider Form 4 filed for equity award, exercise, or tax withholding

Chaubal Amol (SVP & Chief Financial Officer) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Shares were withheld by the company to settle tax due when equity vested. This is an automatic administrative step and not a decision to sell.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`F`	Tax withholding on vested shares	239	$352.21	$84.2K

Filing: Form 4 (Insider Transaction) Insider: Chaubal Amol (SVP & Chief Financial Officer) Shares: 239

View on SEC EDGAR → Open Filing Document →

Form 4 Tax withholding Tax / Compensation Filing 2026-04-07

WAT insider Form 4 filed for equity award, exercise, or tax withholding

Bennett Jianqing (SVP Waters Adv. Diagnostics) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Shares were withheld by the company to settle tax due when equity vested. This is an automatic administrative step and not a decision to sell.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`F`	Tax withholding on vested shares	302	$304.09	$91.8K

Filing: Form 4 (Insider Transaction) Insider: Bennett Jianqing (SVP Waters Adv. Diagnostics) Shares: 302

View on SEC EDGAR → Open Filing Document →

Form 4 Compensation award Tax / Compensation Filing 2026-04-02

WAT insider Form 4 filed for equity award, exercise, or tax withholding

Jiang Wei (Director) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`A`	Compensation award	64	—	—

Filing: Form 4 (Insider Transaction) Insider: Jiang Wei (Director) Shares: 64

View on SEC EDGAR → Open Filing Document →

Form 4 Compensation award Tax / Compensation Filing 2026-04-02

WAT insider Form 4 filed for equity award, exercise, or tax withholding

Knight Heather (Director) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`A`	Compensation award	68	—	—

Filing: Form 4 (Insider Transaction) Insider: Knight Heather (Director) Shares: 68

View on SEC EDGAR → Open Filing Document →

Form 4 Open-market purchase Insider Buying 2026-03-18

WAT insider Jiang Wei (Director) bought 500 shares (~$144.7K)

Jiang Wei, listed as Director at WATERS CORP /DE/, reported an open-market purchase of 500 WAT shares in a Form 4 filing. Insider buying is often treated as a bullish signal because company insiders are committing their own capital.

The insider bought shares on the open market with their own money. This is the only Form 4 category that requires a discretionary cash outlay at the prevailing price.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`P`	Open-market purchase	500	$289.46	$144.7K

Filing: Form 4 (Insider Transaction) Insider: Jiang Wei (Director) Shares: 500 Est. Value: $144.7K

View on SEC EDGAR → Open Filing Document →

Proposed Insider Sales 1 · Form 144

A Form 144 is a notice of intent to sell restricted or control securities. It is not a record that anything was sold. Waters Corporation has 1 such notice in this period.

The distinction matters because a Form 144 is frequently reported as though it were a completed insider sale. The filer may sell all of the shares covered, some of them, or none at all, and there is no obligation to update the notice either way. A sale that is actually executed by an officer or director shows up separately on a Form 4, which is the filing to check before treating a proposed sale as a real one.

Form 144 Proposed Insider Sale 2026-08-06

WAT Form 144 filed for proposed insider sale by KUEBLER CHRISTOPHER A (3,626 shares) ~$1.44M

KUEBLER CHRISTOPHER A filed a Form 144 with the SEC indicating intent to sell WAT (WATERS CORP /DE/) shares. Form 144 reflects a proposed sale, not a completed transaction. The actual execution, if any, would typically appear later in a Form 4.

Filing: Form 144 (Proposed Sale Notice) Insider: KUEBLER CHRISTOPHER A Shares: 3,626 Est. Value: $1.44M

View on SEC EDGAR → Open Filing Document →

Material Events 6 · Form 8-K

An 8-K reports a material event in the window between scheduled reports. There are 6 in this period for Waters Corporation. Each 8-K names the item number it is filed under, and that number is the fastest way to tell a routine disclosure from a consequential one.

Item 2.02 is an earnings release, Item 5.02 is a change of directors or officers, and Item 1.01 or 2.01 covers a material agreement or a completed acquisition. Item 7.01 and Item 8.01 are the general-purpose disclosure items and carry no fixed meaning on their own.

Form 8-K Material Company Update 2026-08-21