Public ownership evidence

Waters Corp (WAT) Ownership Disclosures

Read WAT insider transactions, institutional 13F filings and Congressional disclosures with report dates, public availability and original receipts.

As of 2026-10-10T12:08:28.848Z

Separate the three disclosure sources

Step 1 of 3

Recent Form 4 activity

Waters Corp: source evidence dated 2026-10-10T12:08:28.848Z.

Available
2026-10-02
Trade date
2026-09-30
Reporting owners
Knight Heather
Code
A
Shares
57.41
Reported value
Not reported
What you should see

The displayed owner or issuer and source fields identify the receipt to verify; keep reporting and availability dates separate.

Step 2 of 3

Is this an insider transaction, 13F holding, or Congressional event?

Each source has different dates and units. Raw ticker-matched receipts, including amendments, are not deduplicated current ownership totals.

SEC 0001000697-26-000138
What you should see

Follow the source receipt or manager/member profile. Avoid combining transaction value and 13F position value into an ownership percentage.

Step 3 of 3

Read WAT fundamentals

Follow the source receipt or manager/member profile. Avoid combining transaction value and 13F position value into an ownership percentage.

Read WAT fundamentals
What you should see

Keep reporting dates and units beside the answer, and inspect its original citations.

Recent Form 4 activity

See the complete recent form 4 activity

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2026-10-022026-09-30Knight HeatherA57.41Not reported
2026-10-022026-09-30Jiang WeiA57.41Not reported
2026-08-082026-08-06KUEBLER CHRISTOPHER AS3,626Not reported

90-day public availability window, up to 50 records.

Recent institutional filing receipts

These are raw ticker-matched positions in recent 13F receipts, including amendments. They are not deduplicated current ownership totals. Open the manager profile to inspect its effective filing book.

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Cornerstone Financial Management LLC2026-06-302026-08-2935$13,126None
Cornerstone Financial Management LLC2026-03-312026-08-2932$9,530None
Cornerstone Financial Management LLC2025-12-312026-08-2923$8,736None
B. Riley Wealth Advisors, Inc.2025-03-312026-08-29771$284,170None
Advisors Asset Management, Inc.2021-12-312026-08-286,788$2,529,209None
Advisors Asset Management, Inc.2022-12-312026-08-288,196$2,807,786None
Advisors Asset Management, Inc.2020-06-302026-08-285,037$908,675None
Advisors Asset Management, Inc.2022-06-302026-08-2810,162$3,363,000None
Advisors Asset Management, Inc.2021-09-302026-08-286,546$2,339,000None
Corient Private Wealth LP2026-06-302026-08-281,283$481,270None
Corient Private Wealth LP2026-06-302026-08-2812,438$4,664,731None
Formuepleje A/S2026-03-312026-08-285,964$1,776,079None
Formuepleje A/S2025-12-312026-08-284,532$1,721,390None
Formuepleje A/S2025-09-302026-08-285,078$1,522,435None
Formuepleje A/S2025-06-302026-08-287,294$2,688,350None
Formuepleje A/S2025-03-312026-08-287,294$2,688,350None
Formuepleje A/S2024-12-312026-08-2813,194$4,894,710None
Formuepleje A/S2024-09-302026-08-2812,171$4,380,221None
Formuepleje A/S2024-06-302026-08-2813,853$4,019,032None
Formuepleje A/S2024-03-312026-08-2816,999$5,851,566None
Formuepleje A/S2023-12-312026-08-2817,096$5,628,516None
Formuepleje A/S2023-09-302026-08-2818,500$5,072,885None
Formuepleje A/S2023-06-302026-08-2821,735$5,793,247None
Formuepleje A/S2023-03-312026-08-2829,545$9,148,018None
Formuepleje A/S2022-12-312026-08-2847,809$16,378,407None
Formuepleje A/S2022-09-302026-08-2838,633$10,412,752None
Formuepleje A/S2022-06-302026-08-2824,318$8,048,772None
Formuepleje A/S2022-03-312026-08-2828,652$9,216,202None
Formuepleje A/S2021-12-312026-08-2830,672$11,428,387None
Formuepleje A/S2021-09-302026-08-2825,746$9,199,046None
Formuepleje A/S2021-06-302026-08-2826,356$9,108,897None
Formuepleje A/S2021-03-312026-08-2830,453$8,653,829None
Formuepleje A/S2020-12-312026-08-2828,517$7,055,676None
Formuepleje A/S2020-09-302026-08-2825,673$5,023,693None
Formuepleje A/S2020-06-302026-08-2821,009$3,790,024None
Formuepleje A/S2020-03-312026-08-2821,543$3,921,903None
Formuepleje A/S2019-12-312026-08-2811,753$2,746,088None
Formuepleje A/S2019-09-302026-08-289,229$2,060,190None
Formuepleje A/S2019-06-302026-08-288,429$1,814,258None
Formuepleje A/S2019-03-312026-08-285,028$1,265,598None
Formuepleje A/S2018-12-312026-08-285,072$956,833None
Formuepleje A/S2018-09-302026-08-285,382$1,047,768None
Principia Wealth Advisory, LLC2026-06-302026-08-276$2,250None
Principia Wealth Advisory, LLC2026-03-312026-08-275$1,489None
Advisors Asset Management, Inc.2024-03-312026-08-275,470$1,882,938None
Advisors Asset Management, Inc.2025-03-312026-08-272,763$1,018,359None
Advisors Asset Management, Inc.2022-09-302026-08-2710,264$2,766,000None
Advisors Asset Management, Inc.2020-12-312026-08-275,982$1,480,000None
Advisors Asset Management, Inc.2022-03-312026-08-278,146$2,528,437None
Advisors Asset Management, Inc.2023-06-302026-08-276,781$1,807,408None

90-day public filing window, up to 50 source positions.

Cornerstone Financial Management LLC ↗Cornerstone Financial Management LLC ↗Cornerstone Financial Management LLC ↗B. Riley Wealth Advisors, Inc. ↗Advisors Asset Management, Inc. ↗Advisors Asset Management, Inc. ↗Advisors Asset Management, Inc. ↗Advisors Asset Management, Inc. ↗Advisors Asset Management, Inc. ↗Corient Private Wealth LP ↗

Recent Congressional disclosures

No matching Congressional transactions were returned in this source preview.

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No records are available for this view.

Bounded public source preview, up to 25 disclosed events.

How to read the disclosure dates

The tables report different things: insider transactions, institutional positions and Congressional transaction ranges. Read each table with its source dates and units. They cannot be added into a combined ownership percentage.

  1. Company insiders

    SEC Form 4 purchases, sales and awards report transactions and their public filing availability.

  2. Institutional managers

    13F reports disclose delayed quarter-end positions. They are not a record of trades between quarters.

  3. Congressional filers

    Periodic transaction reports disclose transaction dates and amount brackets. Public filing dates determine what researchers could know.

Institutional source directory ↗Congressional source directory ↗

Read the transaction codes

Awards use transaction code A, purchases P and sales S. An acquisition from an award is not the same as an open-market purchase. Joint filers may share a transaction. Use original receipts and availability dates to interpret the events.

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