Waters Corporation
MX ˙ BMV ˙ US9418481035
SecurityMX:WAT / Waters Corporation
InstitutionMorgan Stanley
Latest Disclosed Ownership1,221,914 shares
Latest Disclosed Value $ 363,887,009
Morgan Stanley reports 69.91% increase in ownership of WAT / Waters Corporation

On May 15, 2026 - Morgan Stanley filed a 13F-HR form disclosing ownership of 1,221,914 shares of Waters Corporation (MX:WAT) valued at $363,887,009 USD as of March 31, 2026. The entity filed a previous 13F-HR/A on May 27, 2026 disclosing 719,171 shares of Waters Corporation. This represents a change in shares of 69.91% 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 1,221,914 502,743 69.91 363,887 33.21 0.0219
2026-05-27 2025-12-31 13F/A-1 WATERS COM 941848103 719,171 -18,081 -2.45 273,164 23.58 0.0163
2026-02-13 2025-12-31 13F WATERS COM 941848103 719,171 -18,081 273,164 0.0163
2026-05-27 2025-09-30 13F/A-1 WATERS COM 941848103 737,252 -99,152 -11.85 221,036 -24.29 0.0134
2025-11-14 2025-09-30 13F WATERS COM 941848103 737,252 -99,152 221,036 0.0134
2025-08-15 2025-06-30 13F WATERS COM 941848103 836,404 123,223 17.28 291,939 11.06 0.0190
2025-05-15 2025-03-31 13F WATERS COM 941848103 713,181 12,428 1.77 262,858 1.11 0.0188
2025-05-15 2024-12-31 13F/A-1 WATERS COM 941848103 700,753 209,917 42.77 259,967 47.17 0.0182
2025-02-14 2024-12-31 13F WATERS COM 941848103 700,753 209,917 259,967 0.0182
2025-05-14 2024-09-30 13F/A-2 WATERS COM 941848103 490,836 -32,774 -6.26 176,648 16.28 0.0128
2025-02-14 2024-09-30 13F/A-1 WATERS COM 941848103 490,836 -32,774 176,648 0.0128
2024-11-14 2024-09-30 13F WATERS COM 941848103 490,836 -32,774 176,648 0.0015
2025-05-14 2024-06-30 13F/A-2 WATERS COM 941848103 523,610 -44,912 -7.90 151,911 -22.38 0.0118
2024-10-17 2024-06-30 13F/A-1 WATERS COM 941848103 523,610 -44,912 151,911 0.0118
2024-08-14 2024-06-30 13F WATERS COM 941848103 523,610 -44,912 151,911 0.0118
2024-10-17 2024-03-31 13F/A-2 WATERS COM 941848103 568,522 -36,372 -6.01 195,703 -1.73 0.0157
2024-08-16 2024-03-31 13F/A-1 WATERS COM 941848103 568,522 -36,372 195,703 0.0157
2024-05-15 2024-03-31 13F WATERS COM 941848103 568,522 -36,372 195,703 0.0157
2024-08-16 2023-12-31 13F/A-1 WATERS COM 941848103 604,894 126,526 26.45 199,150 51.82 0.0175
2024-02-13 2023-12-31 13F WATERS COM 941848103 604,894 126,526 199,150 0.0175
2023-11-15 2023-09-30 13F WATERS COM 941848103 478,368 24,286 5.35 131,174 8.38 0.0133
2023-08-14 2023-06-30 13F WATERS COM 941848103 454,082 -388,971 -46.14 121,031 -53.63 0.0119
2023-05-15 2023-03-31 13F WATERS COM 941848103 843,053 40,469 5.04 261,035 -5.06 0.0280
2023-02-14 2022-12-31 13F WATERS COM 941848103 802,584 414,334 106.72 274,950 162.74 0.0312
2022-11-14 2022-09-30 13F WATERS COM 941848103 388,250 -15,712 -3.89 104,646 -21.73 0.0143
2022-10-27 2022-06-30 13F/A-1 WATERS COM 941848103 403,962 259,706 180.03 133,704 198.61 0.0174
2022-08-15 2022-06-30 13F WATERS COM 941848103 403,962 259,706 133,704 0.0035
2022-10-27 2022-03-31 13F/A-1 WATERS COM 941848103 144,256 -63,726 -30.64 44,776 -42.22 0.0060
2022-05-13 2022-03-31 13F WATERS COM 941848103 144,256 -63,726 44,776 0.0060
2022-02-14 2021-12-31 13F WATERS COM 941848103 207,982 13,789 7.10 77,495 11.69 0.0096
2021-11-15 2021-09-30 13F WATERS COM 941848103 194,193 37,365 23.83 69,384 28.01 0.0093
2021-08-23 2021-06-30 13F/A-1 WATERS COM 941848103 156,828 -10,409 -6.22 54,201 14.05 0.0071
2021-08-16 2021-06-30 13F WATERS COM 941848103 156,828 -10,409 54,201 0.0015
2021-05-17 2021-03-31 13F WATERS COM 941848103 167,237 -62,167 -27.10 47,523 -16.27 0.0070
2021-02-16 2020-12-31 13F WATERS COM 941848103 229,404 113,150 97.33 56,758 149.51 0.0088
2020-11-13 2020-09-30 13F WATERS COM 941848103 116,254 -112,450 -49.17 22,748 -44.87 0.0044
2020-08-14 2020-06-30 13F WATERS COM 941848103 228,704 183,666 407.80 41,259 403.22 0.0091
2020-05-26 2020-03-31 13F/A-1 WATERS COM 941848103 45,038 -97,550 -68.41 8,199 -75.39 0.0022
2020-05-15 2020-03-31 13F WATERS COM 941848103 45,038 -97,550 8,199 629.8541
2020-02-14 2019-12-31 13F WATERS COM 941848103 142,588 57,636 67.85 33,315 75.67 0.0077
2019-11-14 2019-09-30 13F WATERS COM 941848103 84,952 -4,475 -5.00 18,964 -1.48 0.0050
2019-08-14 2019-06-30 13F WATERS COM 941848103 89,427 -127,596 -58.79 19,249 -64.76 0.0051
2019-05-15 2019-03-31 13F WATERS COM 941848103 217,023 -92,949 -29.99 54,627 -6.58 0.0155
2019-02-14 2018-12-31 13F WATERS COM 941848103 309,972 -217,590 -41.24 58,476 -43.07 0.0175
2019-04-23 2018-09-30 13F/A-2 WATERS COM 941848103 527,562 344,432 188.08 102,707 189.71 0.0257
2018-11-20 2018-09-30 13F/A-1 WATERS COM 941848103 527,562 0 102,707 0.0257
2018-11-14 2018-09-30 13F WATERS COM 941848103 527,562 344,432 102,707
2019-04-23 2018-06-30 13F/A-1 WATERS COM 941848103 183,130 -292,760 -61.52 35,452 -62.50 0.0096
2018-08-14 2018-06-30 13F WATERS COM 941848103 183,130 -292,760 35,452
2019-04-23 2018-03-31 13F/A-1 WATERS COM 941848103 475,890 86,927 22.35 94,536 25.81 0.0262
2018-05-14 2018-03-31 13F WATERS COM 941848103 475,890 86,927 94,536
2019-04-23 2017-12-31 13F/A-1 WATERS COM 941848103 388,963 -31,091 -7.40 75,143 -0.35 0.0206
2018-02-14 2017-12-31 13F WATERS COM 941848103 388,963 -31,091 75,143
2017-11-14 2017-09-30 13F WATERS COM 941848103 420,054 316,690 306.38 75,408 296.84 0.0226
2017-08-11 2017-06-30 13F WATERS COM 941848103 103,364 -83,271 -44.62 19,002 -34.87 0.0057
2017-05-22 2017-03-31 13F/A-1 WATERS COM 941848103 186,635 -173,519 -48.18 29,174 -39.73 0.0090
2017-05-12 2017-03-31 13F WATERS COM 941848103 186,635 29,174
2017-02-22 2016-12-31 13F/A-1 WATERS COM 941848103 360,154 252,104 233.32 48,402 182.64 0.0158
2017-02-13 2016-12-31 13F WATERS COM 941848103 360,154 48,402
2016-11-10 2016-09-30 13F WATERS COM 941848103 108,050 74,598 223.00 17,125 263.90 0.0058
2016-08-12 2016-06-30 13F WATERS COM 941848103 33,452 -37,871 -53.10 4,706 -49.97 0.0017
2016-05-12 2016-03-31 13F WATERS COM 941848103 71,323 36,096 102.47 9,407 98.46 0.0036
2016-02-09 2015-12-31 13F WATERS COM 941848103 35,227 -82,988 -70.20 4,740 -66.08 0.0017
2016-02-08 2015-09-30 13F/A-1 WATERS COM 941848103 118,215 79,543 205.69 13,974 181.56 0.0052
2015-11-09 2015-09-30 13F WATERS COM 941848103 118,215 13,974
2015-08-12 2015-06-30 13F WATERS COM 941848103 38,672 -31,868 -45.18 4,963 -43.40 0.0017
2015-05-14 2015-03-31 13F WATERS COM 941848103 70,540 -26,910 -27.61 8,769 -20.17 0.0032
2015-02-13 2014-12-31 13F WATERS COM 941848103 97,450 12,843 15.18 10,985 30.98 0.0040
2014-12-16 2014-09-30 13F/A-1 WATERS COM 941848103 84,607 -108,644 -56.22 8,387 -59.97 0.0032
2014-11-14 2014-09-30 13F WATERS COM 941848103 84,607 8,387
2014-05-13 2014-03-31 13F WATERS COM 941848103 193,251 -119,520 -38.21 20,951 -33.02 0.0088
2014-02-13 2013-12-31 13F WATERS COM 941848103 312,771 229,447 275.37 31,278 253.46 0.0133
2013-11-13 2013-09-30 13F WATERS CORP COM ST COM 941848103 83,324 16,611 24.90 8,849 32.59 0.0042
2013-08-08 2013-06-30 13F WATERS CORP COM ST COM 941848103 66,713 66,713 6,674 0.0034
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.