Waters Corporation
US ˙ NYSE ˙ US9418481035

SecurityWAT / Waters Corporation
InstitutionHm Payson & Co
Latest Disclosed Ownership10,097 shares
Latest Disclosed Value $ 3,006,887
Hm Payson & Co reports 123.58% increase in ownership of WAT / Waters Corporation

On April 13, 2026 - Hm Payson & Co filed a 13F-HR form disclosing ownership of 10,097 shares of Waters Corporation (US:WAT) valued at $3,006,887 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 4,516 shares of Waters Corporation. This represents a change in shares of 123.58% during the quarter. The current value of the position is $3,834,538 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

Upgrade to unlock premium data and export to Excel .

Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-04-13 2026-03-31 13F WATERS COM 941848103 10,097 5,581 123.58 3,007 75.28 0.0225
2026-02-12 2025-12-31 13F WATERS COM 941848103 4,516 0 0.00 1,715 26.76 0.0242
2025-10-17 2025-09-30 13F WATERS COM 941848103 4,516 6 0.13 1,354 -14.04 0.0195
2025-10-17 2025-06-30 13F WATERS COM 941848103 4,510 -75 -1.64 1,574 -6.81 0.0249
2025-04-29 2025-03-31 13F WATERS COM 941848103 4,585 -75 -1.61 1,690 -2.26 0.0297
2025-02-07 2024-12-31 13F WATERS COM 941848103 4,660 0 0.00 1,729 3.04 0.0293
2024-10-28 2024-09-30 13F WATERS COM 941848103 4,660 0 0.00 1,677 24.13 0.0288
2024-08-13 2024-06-30 13F WATERS COM 941848103 4,660 0 0.00 1,352 -15.77 0.0246
2024-06-20 2024-03-31 13F WATERS COM 941848103 4,660 0 0.00 1,604 4.56 0.0298
2024-02-13 2023-12-31 13F WATERS COM 941848103 4,660 0 0.00 1,534 20.13 0.0318
2023-11-06 2023-09-30 13F WATERS COM 941848103 4,660 0 0.00 1,278 2.82 0.0300
2023-07-17 2023-06-30 13F WATERS COM 941848103 4,660 0 0.00 1,242 -13.87 0.0279
2023-04-18 2023-03-31 13F WATERS COM 941848103 4,660 0 0.00 1,443 -9.65 0.0346
2023-02-06 2022-12-31 13F WATERS COM 941848103 4,660 0 0.00 1,596 27.07 0.0398
2022-10-25 2022-09-30 13F WATERS COM 941848103 4,660 -14 -0.30 1,256 -18.81 0.0345
2022-08-15 2022-06-30 13F WATERS COM 941848103 4,674 0 0.00 1,547 6.62 0.0397
2022-05-12 2022-03-31 13F WATERS COM 941848103 4,674 0 0.00 1,451 -16.70 0.0330
2022-02-15 2021-12-31 13F WATERS COM 941848103 4,674 0 0.00 1,742 4.31 0.0379
2021-11-30 2021-09-30 13F WATERS COM 941848103 4,674 0 0.00 1,670 3.41 0.0407
2021-08-17 2021-06-30 13F WATERS COM 941848103 4,674 0 0.00 1,615 21.61 0.0394
2021-06-15 2021-03-31 13F WATERS COM 941848103 4,674 0 0.00 1,328 14.88 0.0354
2021-03-10 2020-12-31 13F WATERS COM 941848103 4,674 0 0.00 1,156 26.34 0.0319
2020-12-21 2020-09-30 13F WATERS COM 941848103 4,674 0 0.00 915 8.54 0.0282
2020-08-13 2020-06-30 13F WATERS COM 941848103 4,674 0 0.00 843 -0.94 0.0283
2020-07-01 2020-03-31 13F WATERS COM 941848103 4,674 -64 -1.35 851 -23.13 0.0334
2020-02-18 2019-12-31 13F WATERS COM 941848103 4,738 -43 -0.90 1,107 3.75 0.0356
2019-11-12 2019-09-30 13F WATERS COM 941848103 4,781 -141 -2.86 1,067 0.76 0.0376
2019-08-15 2019-06-30 13F WATERS COM 941848103 4,922 4,922 1,059 0.0380
2019-02-15 2018-12-31 13F WATERS COMMON STOCK 941848103 0 -4,815 -100.00 0 -100.00
2018-11-30 2018-09-30 13F WATERS COMMON STOCK 941848103 4,815 -316 -6.16 937 -5.64 0.0419
2018-08-27 2018-06-30 13F WATERS COMMON STOCK 941848103 5,131 23 0.45 993 -2.17 0.0424
2018-05-14 2018-03-31 13F WATERS COMMON STOCK 941848103 5,108 0 0.00 1,015 2.84 0.0419
2018-02-16 2017-12-31 13F WATERS COMMON STOCK 941848103 5,108 150 3.03 987 10.90 0.0397
2017-11-06 2017-09-30 13F WATERS COMMON STOCK 941848103 4,958 0 0.00 890 -2.31 0.0383
2017-08-04 2017-06-30 13F WATERS COMMON STOCK 941848103 4,958 0 0.00 911 17.55 0.0411
2017-05-25 2017-03-31 13F WATERS COMMON STOCK 941848103 4,958 35 0.71 775 17.07 0.0353
2017-02-15 2016-12-31 13F WATERS COMMON STOCK 941848103 4,923 -50 -1.01 662 -15.99 0.0315
2016-11-14 2016-09-30 13F WATERS COMMON STOCK 941848103 4,973 0 0.00 788 12.73 0.0384
2016-08-08 2016-06-30 13F WATERS COMMON STOCK 941848103 4,973 0 0.00 699 6.55 0.0349
2016-05-19 2016-03-31 13F WATERS COMMON STOCK 941848103 4,973 -43 -0.86 656 -2.81 0.0341
2016-02-23 2015-12-31 13F WATERS COMMON STOCK 941848103 5,016 0 0.00 675 13.83 0.0347
2015-11-02 2015-09-30 13F WATERS COMMON STOCK 941848103 5,016 0 0.00 593 -7.92 0.0321
2015-08-11 2015-06-30 13F WATERS COMMON STOCK 941848103 5,016 0 0.00 644 3.21 0.0320
2015-05-06 2015-03-31 13F WATERS COMMON STOCK 941848103 5,016 -600 -10.68 624 -1.42 0.0312
2015-02-10 2014-12-31 13F WATERS COMMON STOCK 941848103 5,616 0 0.00 633 13.64 0.0313
2014-11-12 2014-09-30 13F WATERS COMMON STOCK 941848103 5,616 -175 -3.02 557 -7.93 0.0285
2014-08-13 2014-06-30 13F WATERS COMMON STOCK 941848103 5,791 0 0.00 605 -3.66 0.0311
2014-05-07 2014-03-31 13F WATERS COMMON STOCK 941848103 5,791 100 1.76 628 10.37 0.0332
2014-02-10 2013-12-31 13F WATERS COMMON STOCK 941848103 5,691 0 0.00 569 -5.79 0.0305
2013-11-13 2013-09-30 13F WATERS COMMON STOCK 941848103 5,691 0 0.00 604 6.15 0.0350
2013-08-13 2013-06-30 13F WATERS COMMON STOCK 941848103 5,691 5,691 569 0.0342
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.