Waters Corporation
MX ˙ BMV ˙ US9418481035
SecurityMX:WAT / Waters Corporation
InstitutionAviva Plc
Latest Disclosed Ownership84,425 shares
Latest Disclosed Value $ 25,141,765
Aviva Plc reports 63.49% increase in ownership of WAT / Waters Corporation

On May 14, 2026 - Aviva Plc filed a 13F-HR form disclosing ownership of 84,425 shares of Waters Corporation (MX:WAT) valued at $25,141,765 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 51,640 shares of Waters Corporation. This represents a change in shares of 63.49% 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)
2026-05-14 2026-03-31 13F WATERS COM 941848103 84,425 32,785 63.49 25,142 28.18 0.0422
2026-02-12 2025-12-31 13F WATERS COM 941848103 51,640 4,422 9.37 19,614 38.56 0.0331
2025-11-13 2025-09-30 13F WATERS COM 941848103 47,218 2,897 6.54 14,156 -8.49 0.0257
2025-08-07 2025-06-30 13F WATERS COM 941848103 44,321 -73,052 -62.24 15,470 -64.24 0.0319
2025-05-15 2025-03-31 13F WATERS COM 941848103 117,373 5,514 4.93 43,260 4.25 0.1044
2025-02-13 2024-12-31 13F WATERS COM 941848103 111,859 -2,119 -1.86 41,497 1.17 0.1078
2024-11-14 2024-09-30 13F WATERS COM 941848103 113,978 2,447 2.19 41,020 26.77 0.1063
2024-08-02 2024-06-30 13F WATERS COM 941848103 111,531 18,302 19.63 32,357 0.83 0.0897
2024-05-14 2024-03-31 13F WATERS COM 941848103 93,229 -4,868 -4.96 32,092 -0.63 0.1057
2024-02-09 2023-12-31 13F WATERS COM 941848103 98,097 10,552 12.05 32,296 34.54 0.1158
2023-11-13 2023-09-30 13F WATERS COM 941848103 87,545 -2,666 -2.96 24,006 -0.16 0.1010
2023-08-10 2023-06-30 13F WATERS COM 941848103 90,211 -75,559 -45.58 24,045 -53.16 0.0979
2023-05-12 2023-03-31 13F WATERS COM 941848103 165,770 64,349 63.45 51,327 47.73 0.2324
2023-02-14 2022-12-31 13F/A-2 WATERS COM 941848103 101,421 9,510 10.35 34,745 40.25 0.1709
2023-02-10 2022-12-31 13F/A-1 WATERS COM 941848103 101,421 9,510 1,459 0.0070
2023-02-09 2022-12-31 13F WATERS COM 941848103 101,421 9,510 35 0.1669
2022-11-14 2022-09-30 13F WATERS COM 941848103 91,911 9,245 11.18 24,773 -9.46 0.1428
2022-08-04 2022-06-30 13F WATERS COM 941848103 82,666 24,608 42.39 27,361 51.83 0.1456
2022-05-13 2022-03-31 13F WATERS COM 941848103 58,058 33,348 134.96 18,021 95.73 0.0901
2022-02-10 2021-12-31 13F WATERS COM 941848103 24,710 -4,038 -14.05 9,207 -10.37 0.0386
2021-11-12 2021-09-30 13F WATERS COM 941848103 28,748 -2,298 -7.40 10,272 -4.27 0.0458
2021-08-10 2021-06-30 13F WATERS COM 941848103 31,046 5,745 22.71 10,730 49.24 0.0471
2021-05-13 2021-03-31 13F WATERS COM 941848103 25,301 -2,923 -10.36 7,190 2.96 0.0351
2021-02-10 2020-12-31 13F WATERS COM 941848103 28,224 -3,288 -10.43 6,983 13.25 0.0363
2020-11-12 2020-09-30 13F WATERS COM 941848103 31,512 -2,111 -6.28 6,166 1.65 0.0364
2020-08-13 2020-06-30 13F/A-1 WATERS COM 941848103 33,623 -8,651 -20.46 6,066 -21.18 0.0378
2020-08-13 2020-06-30 13F WATERS COM 941848103 33,623 -8,651 6,066 18,364.3837
2020-05-14 2020-03-31 13F WATERS COM 941848103 42,274 10,534 33.19 7,696 3.78 0.0564
2020-02-10 2019-12-31 13F WATERS COM 941848103 31,740 8,212 34.90 7,416 41.20 0.0449
2019-11-12 2019-09-30 13F WATERS COM 941848103 23,528 -3,056 -11.50 5,252 -8.21 0.0356
2019-07-30 2019-06-30 13F WATERS COM 941848103 26,584 -1,871 -6.58 5,722 -20.11 0.0393
2019-05-14 2019-03-31 13F WATERS COM 941848103 28,455 -40 -0.14 7,162 33.22 0.0480
2019-02-12 2018-12-31 13F WATERS COM 941848103 28,495 -8,945 -23.89 5,376 -26.25 0.0401
2018-11-13 2018-09-30 13F WATERS COM 941848103 37,440 -1,525 -3.91 7,289 -3.37 0.0400
2018-08-01 2018-06-30 13F WATERS COM 941848103 38,965 303 0.78 7,543 -1.78 0.0445
2018-05-14 2018-03-31 13F WATERS COM 941848103 38,662 -3,622 -8.57 7,680 -5.99 0.0470
2018-02-13 2017-12-31 13F WATERS COM 941848103 42,284 -6,044 -12.51 8,169 -5.83 0.0462
2017-11-13 2017-09-30 13F WATERS COM 941848103 48,328 425 0.89 8,675 -1.49 0.0467
2017-08-07 2017-06-30 13F WATERS COM 941848103 47,903 420 0.88 8,806 18.66 0.0492
2017-05-15 2017-03-31 13F WATERS COM 941848103 47,483 -2,845 -5.65 7,421 9.68 0.0425
2017-02-13 2016-12-31 13F WATERS COM 941848103 50,328 2,560 5.36 6,766 -10.60 0.0404
2016-11-14 2016-09-30 13F WATERS COM 941848103 47,768 1,257 2.70 7,568 15.68 0.0472
2016-08-05 2016-06-30 13F WATERS COM 941848103 46,511 6,876 17.35 6,542 25.11 0.0448
2016-05-12 2016-03-31 13F WATERS COM 941848103 39,635 -980 -2.41 5,229 -4.34 0.0389
2016-02-11 2015-12-31 13F WATERS COM 941848103 40,615 -352 -0.86 5,466 12.86 0.0414
2015-11-12 2015-09-30 13F WATERS COM 941848103 40,967 -1,242 -2.94 4,843 -10.63 0.0401
2015-08-06 2015-06-30 13F WATERS COM 941848103 42,209 -540 -1.26 5,419 1.96 0.0383
2015-05-14 2015-03-31 13F WATERS COM 941848103 42,749 42,749 0.00 5,315 0.0364
2015-02-05 2014-12-31 13F/A-1 WATERS COM 941848103 0 -33,387 -100.00 0 -100.00
2014-11-13 2014-09-30 13F WATERS COM 941848103 33,387 -280 -0.83 3,309 -5.89 0.0262
2014-08-13 2014-06-30 13F WATERS COM 941848103 33,667 -170 -0.50 3,516 -4.14 0.0269
2014-05-14 2014-03-31 13F WATERS COM 941848103 33,837 1,380 4.25 3,668 13.00 0.0297
2014-02-13 2013-12-31 13F WATERS COM 941848103 32,457 11,380 53.99 3,246 44.98 0.0271
2013-11-13 2013-09-30 13F WATERS COM 941848103 21,077 5,128 32.15 2,239 40.29 0.0196
2013-08-01 2013-06-30 13F WATERS COM 941848103 15,949 15,949 1,596 0.0161
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.