Waters Corporation
MX ˙ BMV ˙ US9418481035
SecurityMX:WAT / Waters Corporation
InstitutionState Street Corp
Latest Disclosed Ownership4,362,010 shares
Latest Disclosed Value $ 1,299,006,578
State Street Corp reports 62.57% increase in ownership of WAT / Waters Corporation

On May 15, 2026 - State Street Corp filed a 13F-HR form disclosing ownership of 4,362,010 shares of Waters Corporation (MX:WAT) valued at $1,299,006,578 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 2,683,138 shares of Waters Corporation. This represents a change in shares of 62.57% 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 4,362,010 1,678,872 62.57 1,299,007 27.46 0.0448
2026-02-13 2025-12-31 13F WATERS COM 941848103 2,683,138 3,615 0.13 1,019,136 26.86 0.0342
2025-11-14 2025-09-30 13F WATERS COM 941848103 2,679,523 3,325 0.12 803,348 -14.00 0.0279
2025-08-14 2025-06-30 13F WATERS COM 941848103 2,676,198 37,763 1.43 934,100 -3.94 0.0350
2025-05-15 2025-03-31 13F WATERS COM 941848103 2,638,435 36,433 1.40 972,448 0.74 0.0401
2025-02-14 2024-12-31 13F WATERS COM 941848103 2,602,002 24,269 0.94 965,290 4.05 0.0381
2024-11-14 2024-09-30 13F WATERS COM 941848103 2,577,733 49,194 1.95 927,700 26.46 0.0377
2024-08-14 2024-06-30 13F WATERS COM 941848103 2,528,539 -8,953 -0.35 733,580 -16.02 0.0321
2024-05-15 2024-03-31 13F WATERS COM 941848103 2,537,492 22,787 0.91 873,481 5.50 0.0390
2024-02-14 2023-12-31 13F WATERS COM 941848103 2,514,705 -31,867 -1.25 827,916 18.56 0.0403
2023-11-14 2023-09-30 13F WATERS COM 941848103 2,546,572 -73,104 -2.79 698,296 0.01 0.0387
2023-08-14 2023-06-30 13F WATERS COM 941848103 2,619,676 29,920 1.16 698,248 -12.92 0.0367
2023-05-15 2023-03-31 13F WATERS COM 941848103 2,589,756 -36,790 -1.40 801,864 -10.88 0.0452
2023-05-15 2022-12-31 13F/A-99 WATERS COM 941848103 2,626,546 -33,808 -1.27 899,802 25.49 0.0529
2023-05-15 2022-12-31 13F WATERS COM 941848103 2,626,546 -33,808 899,802 0.0529
2022-11-15 2022-09-30 13F WATERS COM 941848103 2,660,354 3,351 0.13 717,045 -18.46 0.0454
2022-08-15 2022-06-30 13F WATERS COM 941848103 2,657,003 -78,985 -2.89 879,415 3.56 0.0527
2022-05-16 2022-03-31 13F WATERS COM 941848103 2,735,988 -45,239 -1.63 849,223 -18.05 0.0420
2022-02-14 2021-12-31 13F WATERS COM 941848103 2,781,227 70,524 2.60 1,036,285 7.00 0.0491
2021-11-15 2021-09-30 13F WATERS COM 941848103 2,710,703 29,914 1.12 968,534 4.54 0.0512
2021-08-16 2021-06-30 13F WATERS COM 941848103 2,680,789 109,830 4.27 926,507 26.82 0.0488
2021-07-09 2021-03-31 13F/A-1 WATERS COM 941848103 2,570,959 -67,246 -2.55 730,589 11.93 0.0419
2021-05-17 2021-03-31 13F WATERS COM 941848103 2,570,959 -67,246 730,589 0.0419
2021-02-16 2020-12-31 13F WATERS COM 941848103 2,638,205 -116,609 -4.23 652,745 21.09 0.0400
2020-11-10 2020-09-30 13F WATERS COM 941848103 2,754,814 -61,162 -2.17 539,062 6.11 0.0368
2020-08-14 2020-06-30 13F WATERS COM 941848103 2,815,976 -66,990 -2.32 508,002 -3.21 0.0369
2020-06-19 2020-03-31 13F/A-1 WATERS COM 941848103 2,882,966 -19,180 -0.66 524,844 -22.60 0.0459
2020-05-11 2020-03-31 13F WATERS COM 941848103 2,882,966 -19,180 524,844 46,091.8711
2020-02-06 2019-12-31 13F WATERS COM 941848103 2,902,146 -103,777 -3.45 678,086 1.05 0.0464
2019-11-14 2019-09-30 13F WATERS COM 941848103 3,005,923 -107,520 -3.45 671,012 0.13 0.0500
2019-08-14 2019-06-30 13F WATERS COM 941848103 3,113,443 -65,202 -2.05 670,137 -16.24 0.0500
2019-05-15 2019-03-31 13F WATERS COM 941848103 3,178,645 -14,578 -0.46 800,097 32.82 0.0624
2019-02-12 2018-12-31 13F WATERS COM 941848103 3,193,223 32,565 1.03 602,402 -2.10 0.0548
2018-11-09 2018-09-30 13F WATERS Common equity shares 941848103 3,160,658 112,884 3.70 615,301 4.29 0.0473
2018-08-14 2018-06-30 13F WATERS Common equity shares 941848103 3,047,774 -102,348 -3.25 590,005 -5.72 0.0493
2018-05-15 2018-03-31 13F WATERS Common equity shares 941848103 3,150,122 -136,080 -4.14 625,784 -1.43 0.0531
2018-02-14 2017-12-31 13F WATERS Common equity shares 941848103 3,286,202 -13,310 -0.40 634,869 7.18 0.0511
2017-11-14 2017-09-30 13F WATERS Common equity shares 941848103 3,299,512 -112,298 -3.29 592,346 -5.56 0.0511
2017-08-14 2017-06-30 13F WATERS Common equity shares 941848103 3,411,810 -34,190 -0.99 627,230 16.45 0.0555
2017-05-15 2017-03-31 13F WATERS Common equity shares 941848103 3,446,000 58,746 1.73 538,641 18.33 0.0481
2017-02-09 2016-12-31 13F WATERS Common equity shares 941848103 3,387,254 152,738 4.72 455,212 -11.20 0.0428
2017-01-13 2016-09-30 13F/A-1 WATERS Common equity shares 941848103 3,234,516 3,157 0.10 512,640 12.80 0.0517
2016-11-14 2016-09-30 13F WATERS Common equity shares 941848103 2,380,539 377,293
2016-08-12 2016-06-30 13F WATERS Common equity shares 941848103 3,231,359 -74,652 -2.26 454,481 4.21 0.0488
2016-05-20 2016-03-31 13F/A-1 WATERS Common equity shares 941848103 3,306,011 -66,965 -1.99 436,135 -3.92 0.0472
2016-05-12 2016-03-31 13F WATERS Common equity shares 941848103 3,306,011 436,135
2016-02-16 2015-12-31 13F WATERS Common equity shares 941848103 3,372,976 62,660 1.89 453,919 16.00 0.0496
2015-11-16 2015-09-30 13F WATERS Common equity shares 941848103 3,310,316 -37,214 -1.11 391,302 -8.95 0.0456
2015-08-13 2015-06-30 13F WATERS Common equity shares 941848103 3,347,530 -119,102 -3.44 429,772 -0.28 0.0459
2015-05-15 2015-03-31 13F WATERS Common equity shares 941848103 3,466,632 -140,959 -3.91 430,969 5.98 0.0442
2015-02-11 2014-12-31 13F WATERS Common equity shares 941848103 3,607,591 73,036 2.07 406,654 16.07 0.0405
2014-11-12 2014-09-30 13F/A-1 WATERS Common equity shares 941848103 3,534,555 69,182 2.00 350,348 -3.20 0.0377
2014-11-10 2014-09-30 13F WATERS Common equity shares 941848103 3,534,555 350,348
2014-08-12 2014-06-30 13F WATERS Common equity shares 941848103 3,465,373 27,978 0.81 361,921 -2.88 0.0391
2014-05-15 2014-03-31 13F/A-1 WATERS Common equity shares 941848103 3,437,395 -184,133 -5.08 372,660 2.90 0.0423
2014-05-13 2014-03-31 13F WATERS Common equity shares 941848103 3,437,395 372,660
2014-02-06 2013-12-31 13F/A-1 WATERS Common equity shares 941848103 3,621,528 63,657 1.79 362,168 -4.16 0.0403
2014-02-06 2013-12-31 13F WATERS Common equity shares 941848103 3,625,987 315,898
2013-11-12 2013-09-30 13F WATERS Common equity shares 941848103 3,557,871 -37,772 -1.05 377,876 5.04 0.0466
2013-08-08 2013-06-30 13F WATERS Common equity shares 941848103 3,595,643 3,595,643 359,737 0.0469
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.