Waters Corporation
US ˙ NYSE ˙ US9418481035

SecurityWAT / Waters Corporation
InstitutionStrs Ohio
Latest Disclosed Ownership28,350 shares
Latest Disclosed Value $ 8,442,630
Strs Ohio reports 1,886.69% increase in ownership of WAT / Waters Corporation

On April 24, 2026 - Strs Ohio filed a 13F-HR form disclosing ownership of 28,350 shares of Waters Corporation (US:WAT) valued at $8,442,630 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 2, 2026 disclosing 1,427 shares of Waters Corporation. This represents a change in shares of 1,886.69% during the quarter. The current value of the position is $10,766,480 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.

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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)
2026-04-24 2026-03-31 13F WATERS COM_STK 941848103 28,350 26,923 1,886.69 8,443 1,457.56 0.0335
2026-02-02 2025-12-31 13F WATERS COM_STK 941848103 1,427 3 0.21 542 27.23 0.0020
2025-10-30 2025-09-30 13F WATERS COM_STK 941848103 1,424 -3,804 -72.76 427 -76.64 0.0016
2025-08-04 2025-06-30 13F WATERS COM_STK 941848103 5,228 2,393 84.41 1,825 74.71 0.0068
2025-05-28 2025-03-31 13F WATERS COM_STK 941848103 2,835 -1,346 -32.19 1,045 -32.69 0.0044
2025-05-28 2024-12-31 13F WATERS COM_STK 941848103 4,181 4,181 1,551 0.0062
2022-07-25 2022-06-30 13F WATERS COM 941848103 0 -2,951 -100.00 0 -100.00
2022-04-21 2022-03-31 13F WATERS COM 941848103 2,951 -889 -23.15 915 -36.01 0.0033
2022-01-24 2021-12-31 13F WATERS COM 941848103 3,840 -5,169 -57.38 1,430 -55.56 0.0050
2021-10-22 2021-09-30 13F WATERS COM 941848103 9,009 4,286 90.75 3,218 97.18 0.0121
2021-07-26 2021-06-30 13F WATERS COM 941848103 4,723 1,157 32.45 1,632 61.11 0.0059
2021-04-23 2021-03-31 13F WATERS COM 941848103 3,566 -71 -1.95 1,013 12.68 0.0038
2021-01-25 2020-12-31 13F WATERS COM 941848103 3,637 -450 -11.01 899 12.52 0.0035
2020-12-14 2020-09-30 13F WATERS COM 941848103 4,087 -813 -16.59 799 -9.51 0.0033
2020-07-23 2020-06-30 13F WATERS COM 941848103 4,900 2,583 111.48 883 109.74 0.0039
2020-04-23 2020-03-31 13F WATERS COM 941848103 2,317 -600 -20.57 421 -38.18 0.0022
2020-01-24 2019-12-31 13F WATERS COM 941848103 2,917 44 1.53 681 6.24 0.0029
2019-10-21 2019-09-30 13F/A-1 WATERS COM 941848103 2,873 126 4.59 641 8.46 0.0028
2019-10-21 2019-09-30 13F WATERS COM 941848103 2,873 -44 641 2,837.1016
2019-07-25 2019-06-30 13F WATERS COM 941848103 2,747 315 12.95 591 -3.43 0.0026
2019-04-19 2019-03-31 13F WATERS COM 941848103 2,432 1,421 140.55 612 222.11 0.0028
2019-01-23 2018-12-31 13F WATERS COM 941848103 1,011 -3,267 -76.37 190 -77.16 0.0010
2018-10-19 2018-09-30 13F WATERS COM 941848103 4,278 -1,802 -29.64 832 -29.31 0.0036
2018-08-06 2018-06-30 13F WATERS COM 941848103 6,080 -4,561 -42.86 1,177 -44.30 0.0051
2018-04-20 2018-03-31 13F WATERS COM 941848103 10,641 706 7.11 2,113 10.11 0.0093
2018-01-23 2017-12-31 13F WATERS COM 941848103 9,935 108 1.10 1,919 8.79 0.0082
2017-10-23 2017-09-30 13F WATERS COM 941848103 9,827 151 1.56 1,764 -0.79 0.0076
2017-07-26 2017-06-30 13F WATERS COM 941848103 9,676 -1,812 -15.77 1,778 -0.95 0.0079
2017-04-26 2017-03-31 13F WATERS COM 941848103 11,488 159 1.40 1,795 17.94 0.0078
2017-01-24 2016-12-31 13F WATERS COM 941848103 11,329 31 0.27 1,522 -14.97 0.0067
2016-10-27 2016-09-30 13F WATERS COM 941848103 11,298 -657 -5.50 1,790 6.48 0.0080
2016-07-26 2016-06-30 13F WATERS COM 941848103 11,955 -252 -2.06 1,681 4.41 0.0075
2016-04-25 2016-03-31 13F/A-1 WATERS COM 941848103 12,207 -210 -1.69 1,610 -3.65 0.0072
2016-01-28 2015-12-31 13F WATERS COM 941848103 12,417 -65 -0.52 1,671 13.29 0.0075
2015-10-21 2015-09-30 13F WATERS COM 941848103 12,482 3,487 38.77 1,475 27.82 0.0070
2015-08-04 2015-06-30 13F WATERS COM 941848103 8,995 7,725 608.27 1,154 635.03 0.0051
2015-04-27 2015-03-31 13F/A-1 WATERS COM 941848103 1,270 1,270 157 0.0007
2015-04-21 2015-03-31 13F WATERS COM 941848103 1,270 157
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.