Waters Corporation
US ˙ NYSE ˙ US9418481035

SecurityWAT / Waters Corporation
InstitutionQuilter Plc
Latest Disclosed Ownership37,272 shares
Latest Disclosed Value $ 11,099,602
Quilter Plc reports 8.53% increase in ownership of WAT / Waters Corporation

On May 13, 2026 - Quilter Plc filed a 13F-HR form disclosing ownership of 37,272 shares of Waters Corporation (US:WAT) valued at $11,099,602 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 21, 2026 disclosing 34,342 shares of Waters Corporation. This represents a change in shares of 8.53% during the quarter. The current value of the position is $14,154,787 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)
2026-05-13 2026-03-31 13F WATERS COM 941848103 37,272 2,930 8.53 11,100 -14.91 0.0985
2026-01-21 2025-12-31 13F WATERS COM 941848103 34,342 -8,978 -20.72 13,044 0.44 0.2190
2025-10-31 2025-09-30 13F WATERS COM 941848103 43,320 3,229 8.05 12,988 -7.19 0.2230
2025-08-12 2025-06-30 13F WATERS COM 941848103 40,091 -686 -1.68 13,993 -6.89 0.2555
2025-04-24 2025-03-31 13F WATERS COM 941848103 40,777 -8,789 -17.73 15,029 -18.26 0.3121
2025-01-29 2024-12-31 13F WATERS COM 941848103 49,566 -11,258 -18.51 18,388 -16.00 0.3632
2024-11-12 2024-09-30 13F WATERS COM 941848103 60,824 -994 -1.61 21,890 22.05 0.4466
2024-08-09 2024-06-30 13F WATERS COM 941848103 61,818 -217 -0.35 17,935 -16.02 0.4023
2024-05-15 2024-03-31 13F WATERS COM 941848103 62,035 -8,053 -11.49 21,354 -8.27 0.5050
2024-02-14 2023-12-31 13F/A-1 WATERS COM 941848103 70,088 -7,397 -9.55 23,278 -69.89 0.7863
2024-01-24 2023-12-31 13F WATERS COM 941848103 70,088 -7,397 69,681 0.2185
2023-11-01 2023-09-30 13F WATERS COM 941848103 77,485 87 0.11 77,315 0.67 0.3050
2023-07-19 2023-06-30 13F WATERS COM 941848103 77,398 10,958 16.49 76,801 16.41 0.2983
2023-05-16 2023-03-31 13F WATERS COM 941848103 66,440 11,312 20.52 65,975 249.35 0.2533
2023-02-08 2022-12-31 13F WATERS COM 941848103 55,128 13,866 33.60 18,886 69.81 0.6214
2022-11-02 2022-09-30 13F WATERS COM 941848103 41,262 386 0.94 11,121 -17.80 0.3990
2022-08-04 2022-06-30 13F WATERS COM 941848103 40,876 55 0.13 13,529 6.77 0.4577
2022-05-20 2022-03-31 13F WATERS COM 941848103 40,821 804 2.01 12,671 -13.15 0.3444
2022-02-14 2021-12-31 13F WATERS COM 941848103 40,017 1,264 3.26 14,590 5.37 0.3800
2021-11-04 2021-09-30 13F WATERS COM 941848103 38,753 496 1.30 13,847 4.73 0.3863
2021-08-12 2021-06-30 13F WATERS COM 941848103 38,257 -5,990 -13.54 13,221 5.15 0.3802
2021-05-14 2021-03-31 13F/A-1 WATERS COM 941848103 44,247 -2,468 -5.28 12,574 8.79 0.3976
2021-05-12 2021-03-31 13F WATERS COM 941848103 44,247 -2,468 12,574 0.1836
2021-02-12 2020-12-31 13F WATERS COM 941848103 46,715 382 0.82 11,558 27.49 0.3960
2020-11-12 2020-09-30 13F WATERS COM 941848103 46,333 3,245 7.53 9,066 16.63 0.3590
2020-08-12 2020-06-30 13F WATERS COM 941848103 43,088 7,128 19.82 7,773 18.73 0.3808
2020-05-08 2020-03-31 13F WATERS COM 941848103 35,960 -230 -0.64 6,547 -22.58 0.4331
2020-02-13 2019-12-31 13F WATERS COM 941848103 36,190 36,190 8,456 0.4963
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.