Waters Corporation
MX ˙ BMV ˙ US9418481035
SecurityMX:WAT / Waters Corporation
InstitutionFirst Manhattan Co
Latest Disclosed Ownership10,473 shares
Latest Disclosed Value $ 3,118,859
First Manhattan Co reports 35.50% increase in ownership of WAT / Waters Corporation

On May 15, 2026 - First Manhattan Co filed a 13F-HR form disclosing ownership of 10,473 shares of Waters Corporation (MX:WAT) valued at $3,118,859 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 7,729 shares of Waters Corporation. This represents a change in shares of 35.50% 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 10,473 2,744 35.50 3,119 6.24 0.0086
2026-02-17 2025-12-31 13F WATERS COM 941848103 7,729 7,729 2,936 0.0077
2025-08-14 2025-06-30 13F WATERS COM 941848103 0 -975 -100.00 0 -100.00
2025-05-15 2025-03-31 13F WATERS COM 941848103 975 0 0.00 359 -35.08 0.0010
2025-02-14 2024-12-31 13F WATERS COM 941848103 975 975 554 0.0016
2024-08-15 2024-06-30 13F/A-1 WATERS COM 941848103 0 -400 -100.00 0 -100.00
2024-08-14 2024-06-30 13F WATERS COM 941848103 0 0
2024-05-15 2024-03-31 13F WATERS COM 941848103 400 0 0.00 138 4.58 0.0004
2024-02-13 2023-12-31 13F WATERS COM 941848103 400 0 0.00 132 20.18 0.0005
2023-11-14 2023-09-30 13F WATERS COM 941848103 400 0 0.00 110 2.83 0.0004
2023-08-14 2023-06-30 13F WATERS COM 941848103 400 0 0.00 107 -13.82 0.0004
2023-05-15 2023-03-31 13F WATERS COM 941848103 400 0 0.00 124 -10.22 0.0005
2023-02-14 2022-12-31 13F WATERS COM 941848103 400 -1,500 -78.95 137 -73.24 0.0005
2022-11-14 2022-09-30 13F WATERS COM 941848103 1,900 0 0.00 512 -18.47 0.0022
2022-08-15 2022-06-30 13F WATERS COM 941848103 1,900 -46,776 -96.10 628 -95.84 0.0025
2022-05-16 2022-03-31 13F WATERS COM 941848103 48,676 400 0.83 15,108 -16.01 0.0494
2022-02-14 2021-12-31 13F WATERS COM 941848103 48,276 0 0.00 17,987 4.28 0.0593
2021-11-15 2021-09-30 13F WATERS COM 941848103 48,276 1,500 3.21 17,249 6.70 0.0635
2021-08-16 2021-06-30 13F WATERS COM 941848103 46,776 0 0.00 16,166 21.62 0.0590
2021-05-14 2021-03-31 13F WATERS COM 941848103 46,776 0 0.00 13,292 14.85 0.0573
2021-02-16 2020-12-31 13F WATERS COM 941848103 46,776 0 0.00 11,573 26.44 0.0554
2020-11-12 2020-09-30 13F WATERS COMMON 941848103 46,776 -10 -0.02 9,153 8.45 0.0472
2020-08-14 2020-06-30 13F WATERS COMMON 941848103 46,786 0 0.00 8,440 -0.90 0.0488
2020-05-06 2020-03-31 13F WATERS COMMON 941848103 46,786 0 0.00 8,517 -22.08 0.0552
2020-02-13 2019-12-31 13F WATERS COMMON 941848103 46,786 -500 -1.06 10,931 3.56 0.0548
2019-11-13 2019-09-30 13F WATERS COMMON 941848103 47,286 0 0.00 10,555 3.71 0.0581
2019-08-16 2019-06-30 13F WATERS COMMON 941848103 47,286 10 0.02 10,177 -14.47 0.0565
2019-04-12 2019-03-31 13F WATERS COMMON 941848103 47,276 0 0.00 11,899 33.43 0.0687
2019-01-30 2018-12-31 13F WATERS COMMON 941848103 47,276 0 0.00 8,918 -3.10 0.0555
2018-10-15 2018-09-30 13F WATERS COMMON 941848103 47,276 0 0.00 9,203 0.56 0.0490
2018-08-01 2018-06-30 13F WATERS COMMON 941848103 47,276 0 0.00 9,152 -2.54 0.0528
2018-04-20 2018-03-31 13F WATERS COMMON 941848103 47,276 11,483 32.08 9,391 35.83 0.0534
2018-01-22 2017-12-31 13F WATERS COMMON 941848103 35,793 35,082 4,934.18 6,914 5,344.09 0.0379
2017-10-25 2017-09-30 13F WATERS COMMON 941848103 711 0 0.00 127 -2.31 0.0007
2017-08-10 2017-06-30 13F/A-2 WATERS COMMON 941848103 711 711 0.00 130 0.00 0.0008
2017-08-01 2017-06-30 13F/A-1 WATERS COMMON 941848103 711 0 130 0.0008
2017-07-28 2017-06-30 13F WATERS COMMON 941848103 711 711 130
2016-10-20 2016-09-30 13F WATERS COMMON 941848103 0 -4,160 -100.00 0 -100.00
2016-07-14 2016-06-30 13F WATERS COMMON 941848103 4,160 7 0.17 585 6.95 0.0036
2016-04-22 2016-03-31 13F WATERS COMMON 941848103 4,153 -14,544 -77.79 547 -78.26 0.0034
2016-01-20 2015-12-31 13F WATERS COMMON 941848103 18,697 3,603 23.87 2,516 41.03 0.0154
2015-10-26 2015-09-30 13F WATERS COMMON 941848103 15,094 0 0.00 1,784 -7.90 0.0115
2015-07-17 2015-06-30 13F WATERS COMMON 941848103 15,094 0 0.00 1,937 3.25 0.0114
2015-04-30 2015-03-31 13F WATERS COMMON 941848103 15,094 0 0.00 1,876 10.29 0.0108
2015-01-20 2014-12-31 13F WATERS COMMON 941848103 15,094 0 0.00 1,701 13.70 0.0096
2014-10-23 2014-09-30 13F WATERS COMMON 941848103 15,094 0 0.00 1,496 -5.08 0.0087
2014-08-14 2014-06-30 13F/A-1 WATERS COMMON 941848103 15,094 0 0.00 1,576 -3.67 0.0100
2014-05-16 2014-03-31 13F WATERS COMMON 941848103 15,094 0 0.00 1,636 8.42 0.0108
2014-02-04 2013-12-31 13F WATERS COMMON 941848103 15,094 15,094 1,509 0.0100
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.