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 | 8.64 | 8,484,939 | -0.7 | 06/30/2026 |
| Vanguard Capital Management, LLC | 6.53 | 6,415,552 | +0.6 | 06/30/2026 |
| Vanguard Portfolio Management, LLC | 4.83 | 4,740,524 | -0.3 | 06/30/2026 |
| Massachusetts Financial Services Company | 4.71 | 4,625,035 | -0.1 | 06/30/2026 |
| State Street Corp | 4.46 | 4,382,008 | +0.5 | 06/30/2026 |
| T. Rowe Price Investment Management,Inc. | 3.89 | 3,817,779 | -18.1 | 06/30/2026 |
| Amvescap Plc. | 3.56 | 3,494,267 | +61.2 | 06/30/2026 |
| AllianceBernstein L.P. | 2.74 | 2,694,590 | +27.3 | 06/30/2026 |
| Arnhold & S. Bleichroeder Advisers, LLC | 2.72 | 2,670,216 | +69.5 | 06/30/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Vanguard MStar Total Stk Mkt Idx Invest | 3.17 | 3,114,869 | -0.2 | 09/30/2026 |
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 | 8,239,762 $ | Aug 6, 2026 | direct |
| Jiang Wei | Director | 3,630 | 1,679,675 $ | Sep 30, 2026 | direct |
| Knight Heather | Director | 1,338 | 619,069 $ | Sep 30, 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 |
|---|---|---|---|---|---|---|
| Sep 30, 2026 | Knight Heather | Director | Other | 57 | 0.00 | – |
| Sep 30, 2026 | Jiang Wei | Director | Other | 57 | 0.00 | – |
| 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: October 30, 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.