Waters Corporation
MX ˙ BMV ˙ US9418481035
SecurityMX:WAT / Waters Corporation
InstitutionWestpac Banking Corp
Latest Disclosed Ownership1,864 shares
Latest Disclosed Value $ 555,099
Westpac Banking Corp reports 73.72% increase in ownership of WAT / Waters Corporation

On May 11, 2026 - Westpac Banking Corp filed a 13F-HR form disclosing ownership of 1,864 shares of Waters Corporation (MX:WAT) valued at $555,099 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 10, 2026 disclosing 1,073 shares of Waters Corporation. This represents a change in shares of 73.72% 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)
2026-05-11 2026-03-31 13F WATERS COM 941848103 1,864 791 73.72 555 36.36 0.0193
2026-02-10 2025-12-31 13F WATERS COM 941848103 1,073 -80 -6.94 408 17.97 0.0257
2025-11-14 2025-09-30 13F/A-1 WATERS CORP USD 0.01 COM 941848103 1,153 -5,222 -81.91 346 -84.49 0.0214
2025-11-12 2025-09-30 13F WATERS CORP USD 0.01 COM 941848103 1,153 -5,222 346 0.0087
2025-08-11 2025-06-30 13F WATERS COM 941848103 6,375 -18 -0.28 2,225 -5.56 0.1487
2025-05-13 2025-03-31 13F WATERS COM 941848103 6,393 5,393 539.30 2,356 536.76 0.1734
2025-02-12 2024-12-31 13F WATERS COM 941848103 1,000 395 65.29 371 70.51 0.0246
2024-11-08 2024-09-30 13F WATERS COM 941848103 605 0 0.00 218 24.00 0.0146
2024-08-14 2024-06-30 13F/A-1 WATERS COM 941848103 605 0 0.00 176 -15.87 0.0139
2024-08-13 2024-06-30 13F WATERS COM 941848103 290 -315 176 0.0060
2024-05-09 2024-03-31 13F WATERS COM 941848103 605 0 0.00 208 4.52 0.0159
2024-02-08 2023-12-31 13F WATERS COM 941848103 605 -959 -61.32 199 -53.50 0.0164
2023-11-13 2023-09-30 13F WATERS COM 941848103 1,564 -19,951 -92.73 429 -92.54 0.0321
2023-08-10 2023-06-30 13F WATERS COM 941848103 21,515 -4,863 -18.44 5,735 -29.79 0.4047
2023-05-04 2023-03-31 13F WATERS COM 941848103 26,378 1,173 4.65 8,167 -5.41 0.1098
2023-02-06 2022-12-31 13F WATERS COM 941848103 25,205 -9,651 -27.69 8,635 -8.09 0.1276
2022-11-08 2022-09-30 13F WATERS COM 941848103 34,856 1,246 3.71 9,395 -15.55 0.1432
2022-08-10 2022-06-30 13F WATERS COM 941848103 33,610 5,527 19.68 11,124 27.63 0.1449
2022-05-11 2022-03-31 13F WATERS COM 941848103 28,083 2,503 9.78 8,717 -8.55 0.1000
2022-02-08 2021-12-31 13F WATERS COM 941848103 25,580 -430 -1.65 9,531 2.56 0.0987
2021-10-27 2021-09-30 13F WATERS COM 941848103 26,010 -1,061 -3.92 9,293 -0.67 0.0993
2021-08-11 2021-06-30 13F WATERS COM 941848103 27,071 -2,115 -7.25 9,356 12.82 0.0939
2021-05-13 2021-03-31 13F WATERS COM 941848103 29,186 6,648 29.50 8,294 48.73 0.0915
2021-02-11 2020-12-31 13F WATERS COM 941848103 22,538 1,575 7.51 5,576 35.93 0.0633
2020-11-10 2020-09-30 13F WATERS COM 941848103 20,963 -1,279 -5.75 4,102 2.24 0.0556
2020-08-12 2020-06-30 13F WATERS COM 941848103 22,242 -129 -0.58 4,012 -1.47 0.0598
2020-05-14 2020-03-31 13F WATERS COM 941848103 22,371 -258 -1.14 4,073 -22.98 0.0702
2020-02-11 2019-12-31 13F WATERS COM 941848103 22,629 1,018 4.71 5,287 9.60 0.0681
2019-11-13 2019-09-30 13F WATERS COM 941848103 21,611 3,111 16.82 4,824 21.18 0.0671
2019-08-01 2019-06-30 13F WATERS COM 941848103 18,500 670 3.76 3,982 -11.28 0.0608
2019-05-14 2019-03-31 13F WATERS COM 941848103 17,830 -43,879 -71.11 4,488 -61.46 0.0741
2019-02-07 2018-12-31 13F WATERS COM 941848103 61,709 -26,670 -30.18 11,641 -32.34 0.1984
2018-11-13 2018-09-30 13F WATERS COM 941848103 88,379 -2,294 -2.53 17,206 -1.98 0.2950
2018-07-18 2018-06-30 13F WATERS COM 941848103 90,673 -5,533 -5.75 17,553 -8.15 0.3373
2018-05-01 2018-03-31 13F WATERS COM 941848103 96,206 14,120 17.20 19,111 20.51 0.3817
2018-01-18 2017-12-31 13F WATERS COM 941848103 82,086 24,923 43.60 15,858 54.55 0.3603
2017-10-30 2017-09-30 13F WATERS COM 941848103 57,163 -2,721 -4.54 10,262 -6.79 0.2259
2017-08-09 2017-06-30 13F WATERS COM 941848103 59,884 -55,152 -47.94 11,009 -38.77 0.2424
2017-05-18 2017-03-31 13F/A-1 WATERS COM 941848103 115,036 2,396 2.13 17,981 9.88 0.1441
2017-05-11 2017-03-31 13F WATERS COM 941848103 79,713 10,516
2017-02-09 2016-12-31 13F WATERS COM 941848103 112,640 41,850 59.12 16,364 45.86 0.1543
2016-11-10 2016-09-30 13F WATERS COM 941848103 70,790 -11,717 -14.20 11,220 -3.32 0.1212
2016-08-10 2016-06-30 13F WATERS COM 941848103 82,507 2,794 3.51 11,605 10.36 0.1270
2016-05-13 2016-03-31 13F WATERS COM 941848103 79,713 -24,877 -23.79 10,516 -25.29 0.1143
2016-02-11 2015-12-31 13F WATERS COM 941848103 104,590 -1,822 -1.71 14,076 11.90 0.1557
2015-11-16 2015-09-30 13F/A-1 WATERS COM 941848103 106,412 3,602 3.50 12,579 -4.70 0.1384
2015-11-12 2015-09-30 13F WATERS COM 941848103 106,412 12,579
2015-08-12 2015-06-30 13F WATERS COM 941848103 102,810 -12,803 -11.07 13,199 -8.63 0.1291
2015-05-12 2015-03-31 13F WATERS COM 941848103 115,613 1,136 0.99 14,445 11.95 0.1255
2015-02-11 2014-12-31 13F WATERS COM 941848103 114,477 775 0.68 12,904 14.49 0.1228
2014-11-12 2014-09-30 13F WATERS COM 941848103 113,702 5,174 4.77 11,270 -0.56 0.1098
2014-08-11 2014-06-30 13F WATERS COM 941848103 108,528 -5,133 -4.52 11,335 -8.01 0.1092
2014-05-12 2014-03-31 13F WATERS COM 941848103 113,661 -10,807 -8.68 12,322 -1.00 0.1312
2014-02-13 2013-12-31 13F WATERS COM 941848103 124,468 32,965 36.03 12,447 28.07 0.1424
2013-11-12 2013-09-30 13F WATERS COM 941848103 91,503 -8,593 -8.58 9,719 3.12 0.1215
2013-08-14 2013-06-30 13F WATERS COM 941848103 100,096 100,096 9,424 0.1441
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.