Waters Corporation
Ownership
Ownership Structure
Who owns Waters Corporation (WAT)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 99.9% of the shares are freely tradable; institutional investors hold 99.7%.
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| BlackRock Inc | 8.70 | 8,543,014 | +57.3 | 03/31/2026 |
| Vanguard Capital Management, LLC | 6.49 | 6,378,775 | +0.0 | 03/31/2026 |
| Vanguard Portfolio Management, LLC | 4.84 | 4,754,185 | +0.0 | 03/31/2026 |
| T. Rowe Price Investment Management,Inc. | 4.75 | 4,663,879 | +1,728.3 | 03/31/2026 |
| Massachusetts Financial Services Company | 4.71 | 4,630,118 | +76.4 | 03/31/2026 |
| State Street Corp | 4.44 | 4,362,010 | +62.6 | 03/31/2026 |
| Arnhold & S. Bleichroeder Advisers, LLC | 2.72 | 2,670,216 | +69.5 | 06/30/2026 |
| Geode Capital Management, LLC | 2.69 | 2,646,458 | +66.1 | 03/31/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Vanguard MStar Total Stk Mkt Idx Invest | 3.18 | 3,125,915 | +0.3 | 07/31/2026 |
| Vanguard 500 Index Investor | 2.62 | 2,578,387 | +1.1 | 07/31/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Insider holdings
| Person | Role | Shares | Value | As of | Type |
|---|---|---|---|---|---|
| Kuebler Christopher A | Director | 17,808 | 7,652,098 $ | Aug 6, 2026 | direct |
Holdings as of each person's most recent SEC Form 4 filing — excluding options and RSUs, which are not shares yet. Holdings may have changed between two filings.
Insiders
Insider Transactions
| Date | Person | Role | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Aug 6, 2026 | Kuebler Christopher A | Director | Sell | 3,626 | 397.94 | 1,442,930 |
| Aug 6, 2026 | Kuebler Christopher A | Director | Other | 3,626 | 136.43 | 494,695 |
Reportable transactions by officers and major shareholders from SEC Form 4 filings. "Other" includes things like stock grants and option exercises without a buy/sell character. View all insider transactions →
Data as of: September 17, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.