Waters Corporation
MX ˙ BMV ˙ US9418481035
SecurityMX:WAT / Waters Corporation
InstitutionOMERS ADMINISTRATION Corp
Latest Disclosed Ownership10,652 shares
Latest Disclosed Value $ 3,172,166
OMERS ADMINISTRATION Corp reports 43.69% increase in ownership of WAT / Waters Corporation

On May 15, 2026 - OMERS ADMINISTRATION Corp filed a 13F-HR form disclosing ownership of 10,652 shares of Waters Corporation (MX:WAT) valued at $3,172,166 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 7,413 shares of Waters Corporation. This represents a change in shares of 43.69% during the quarter.

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)
2026-05-15 2026-03-31 13F WATERS COM 941848103 10,652 3,239 43.69 3,172 12.68 0.0204
2026-02-13 2025-12-31 13F WATERS COM 941848103 7,413 5,291 249.34 2,816 342.61 0.0201
2025-11-14 2025-09-30 13F WATERS COM 941848103 2,122 0 0.00 636 -14.05 0.0046
2025-08-13 2025-06-30 13F WATERS COM 941848103 2,122 0 0.00 741 -5.37 0.0058
2025-05-14 2025-03-31 13F WATERS COM 941848103 2,122 -347 -14.05 782 -14.54 0.0068
2025-02-14 2024-12-31 13F WATERS COM 941848103 2,469 420 20.50 916 24.15 0.0080
2024-11-13 2024-09-30 13F WATERS COM 941848103 2,049 -1,300 -38.82 737 -24.10 0.0068
2024-08-13 2024-06-30 13F WATERS COM 941848103 3,349 3,349 972 0.0094
2020-05-15 2020-03-31 13F WATERS COM 941848103 0 -14,200 -100.00 0 -100.00
2020-02-14 2019-12-31 13F WATERS COM 941848103 14,200 -14,200 -50.00 3,318 -47.67 0.0383
2019-11-12 2019-09-30 13F WATERS COM 941848103 28,400 4,300 17.84 6,340 20.58 0.0632
2019-08-08 2019-06-30 13F WATERS COM 941848103 24,100 18,500 330.36 5,258 259.89 0.0547
2019-05-15 2019-03-31 13F WATERS COM 941848103 5,600 -2,400 -30.00 1,461 -3.18 0.0168
2019-02-14 2018-12-31 13F WATERS COM 941848103 8,000 8,000 1,509 0.0203
2018-08-09 2018-06-30 13F WATERS COM 941848103 0 -32,100 -100.00 0 -100.00
2018-05-11 2018-03-31 13F WATERS COM 941848103 32,100 17,200 115.44 6,377 121.50 0.0620
2018-05-14 2017-12-31 13F/A-1 WATERS COM 941848103 14,900 14,900 2,879 0.0287
2018-02-13 2017-12-31 13F WATERS COM 941848103 14,900 14,900 2,879
2016-05-12 2016-03-31 13F WATERS COM 941848103 0 0 0 0.0000
2016-02-11 2015-12-31 13F WATERS COM 941848103 0 -6,400 -100.00 0 -100.00
2015-11-12 2015-09-30 13F WATERS COM 941848103 6,400 6,400 757 0.0221
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.