Waters Corporation (WAT) ownership: Top institutional holder: VANGUARD GROUP INC ($2.84B). Insider activity: Net Seller (5 buys, 15 sells). 10 recent congressional STOCK Act disclosures. SEC EDGAR first-party data.
| Holder | Shares | Market Value | Reported |
|---|---|---|---|
| VANGUARD GROUP INC | 7469936.00 | $2.84B | 2025-12-31 |
| BlackRock, Inc. | 8543014.00 | $2.54B | 2026-03-31 |
| MASSACHUSETTS FINANCIAL SERVICES CO /MA/ | 4630118.00 | $2.06B | 2026-03-31 |
| VANGUARD CAPITAL MANAGEMENT LLC | 6378775.00 | $1.90B | 2026-03-31 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 4754185.00 | $1.42B | 2026-03-31 |
| T. Rowe Price Investment Management, Inc. | 4663879.00 | $1.39B | 2026-03-31 |
| STATE STREET CORP | 4362010.00 | $1.30B | 2026-03-31 |
| Fundsmith LLP | 3212075.00 | $956.56M | 2026-03-31 |
| Insider | Transaction | Value | Date |
|---|---|---|---|
| Buy | null | 2026-05-12 | |
| Buy | null | 2026-04-06 | |
| Sell | null | 2026-03-31 | |
| Sell | null | 2026-03-31 | |
| Sell | null | 2026-03-16 | |
| Sell | null | 2026-03-06 | |
| Buy | null | 2026-03-02 | |
| Buy | null | 2026-03-02 |
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Institutional data from SEC Form 13F. Insider data from SEC Form 4. Congressional data from STOCK Act disclosures. Not personalized investment advice.