Waters Corporation
MX ˙ BMV ˙ US9418481035
SecurityMX:WAT / Waters Corporation
InstitutionUBS Group AG
Latest Disclosed Ownership640,339 shares
Latest Disclosed Value $ 190,692,955
UBS Group AG ownership in WAT / Waters Corporation

On May 5, 2026 - UBS Group AG filed a 13F-HR form disclosing ownership of 640,339 shares of Waters Corporation (MX:WAT) valued at $190,692,955 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 29, 2026 disclosing 355,955 shares of Waters Corporation. This represents a change in shares of 79.89% during the quarter.

UBS Group AG has a history of taking positions in derivatives of the underlying security (WAT) in the form of stock options. The firm currently holds call options representing 0 of underlying shares valued at $0 USD and put options representing 0 of underlying shares valued at $0 USD .

Note: prior versions of this page mistakenly stated that the share values represented the number of options, not the number of underlying shares. For more information on the data backing these reports, please see the SEC document Frequently Asked Questions About Form 13F.

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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Institutional Put/Call Ratios
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In addition to reporting standard equity and debt issues, institutions with more than 100MM assets under management must also disclose their put and call option holdings. Since put options generally indicate negative sentiment, and call options indicate positive sentiment, we can get a sense of the overall institutional sentiment by plotting the ratio of puts to calls. The chart to the right plots the historical put/call ratio for this instrument.

Using Put/Call Ratio as an indicator of investor sentiment overcomes one of the key deficiencies of using total institutional ownership, which is that a significant amount of assets under management are invested passively to track indices. Passively-managed funds do not typically buy options, so the put/call ratio indicator more closely tracks the sentiment of actively-managed funds.

MX:WAT / Waters Corporation Historical Put/Call Ratio
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)
2026-05-05 2026-03-31 13F WATERS COM 941848103 640,339 284,384 79.89 190,693 41.04 0.0053
2026-01-29 2025-12-31 13F WATERS COM 941848103 355,955 151,102 73.76 135,202 120.14 0.0219
2025-11-13 2025-09-30 13F WATERS COM 941848103 204,853 -6,123 -2.90 61,417 -16.60 0.0096
2025-08-14 2025-06-30 13F WATERS COM 941848103 210,976 27,191 14.80 73,639 8.71 0.0127
2025-05-13 2025-03-31 13F WATERS COM 941848103 183,785 40,906 28.63 67,738 27.79 0.0125
2025-02-14 2024-12-31 13F WATERS COM 941848103 142,879 35,785 33.41 53,005 37.53 0.0098
2024-11-14 2024-09-30 13F WATERS COM 941848103 107,094 -8,053 -6.99 38,542 15.37 0.0084
2024-08-14 2024-06-30 13F WATERS COM 941848103 115,147 11,103 10.67 33,406 -6.73 0.0083
2024-05-13 2024-03-31 13F WATERS COM 941848103 104,044 91,073 702.13 35,815 738.76 0.0089
2024-02-09 2023-12-31 13F WATERS COM 941848103 12,971 -974 -6.98 4,270 11.69 0.0013
2023-11-09 2023-09-30 13F WATERS COM 941848103 13,945 -40,435 -74.36 3,824 -73.62 0.0013
2023-08-11 2023-06-30 13F WATERS COM 941848103 54,380 38,303 238.25 14,494 191.22 0.0049
2023-05-12 2023-03-31 13F WATERS COM 941848103 16,077 -28,359 -63.82 4,978 -67.30 0.0018
2023-02-08 2022-12-31 13F WATERS COM 941848103 44,436 27,086 156.12 15,223 225.47 0.0057
2022-11-10 2022-09-30 13F WATERS COM 941848103 17,350 1,297 8.08 4,677 -11.99 0.0021
2022-08-10 2022-06-30 13F WATERS COM 941848103 16,053 -3,172 -16.50 5,314 -10.94 0.0022
2022-05-16 2022-03-31 13F WATERS COM 941848103 19,225 -39,011 -66.99 5,967 -72.50 0.0020
2022-02-14 2021-12-31 13F WATERS COM 941848103 58,236 11,254 23.95 21,699 29.26 0.0062
2021-11-15 2021-09-30 13F WATERS COM 941848103 46,982 -35,677 -43.16 16,787 -41.24 0.0053
2021-08-13 2021-06-30 13F WATERS COM 941848103 82,659 -21,846 -20.90 28,569 -3.80 0.0092
2021-05-12 2021-03-31 13F WATERS COM 941848103 104,505 -6,848 -6.15 29,697 7.79 0.0099
2021-02-11 2020-12-31 13F WATERS COM 941848103 111,353 46,801 72.50 27,551 118.12 0.0093
2020-11-12 2020-09-30 13F WATERS COM 941848103 64,552 4,039 6.67 12,631 15.70 0.0048
2020-07-31 2020-06-30 13F WATERS COM 941848103 60,513 7,259 13.63 10,917 12.60 0.0046
2020-05-01 2020-03-31 13F WATERS COM 941848103 53,254 -24,697 -31.68 9,695 -46.77 0.0046
2020-02-14 2019-12-31 13F WATERS COM 941848103 77,951 -6,736 -7.95 18,213 -3.66 0.0063
2019-11-14 2019-09-30 13F WATERS COM 941848103 84,687 -28,795 -25.37 18,905 -22.60 0.0073
2019-08-14 2019-06-30 13F WATERS COM 941848103 113,482 -26,979 -19.21 24,425 -30.92 0.0094
2019-05-14 2019-03-31 13F WATERS COM 941848103 140,461 54,608 63.61 35,355 118.29 0.0146
2019-02-14 2018-12-31 13F WATERS COM 941848103 85,853 -39,875 -31.72 16,196 -33.83 0.0073
2018-11-14 2018-09-30 13F WATERS COM 941848103 125,728 69,428 123.32 24,477 124.58 0.0097
2018-08-14 2018-06-30 13F WATERS COM 941848103 56,300 -30,417 -35.08 10,899 -36.73 0.0047
2018-05-15 2018-03-31 13F WATERS COM 941848103 86,717 -25,968 -23.04 17,226 -20.87 0.0074
2018-02-14 2017-12-31 13F WATERS COM 941848103 112,685 27,887 32.89 21,769 43.00 0.0089
2017-11-14 2017-09-30 13F WATERS COM 941848103 84,798 -7,834 -8.46 15,223 -10.61 0.0070
2017-11-14 2017-06-30 13F/A-1 WATERS COM 941848103 92,632 35,221 61.35 17,029 89.76 0.0088
2017-08-14 2017-06-30 13F WATERS COM 941848103 92,632 35,221 17,029
2017-11-14 2017-03-31 13F/A-1 WATERS COM 941848103 57,411 25,613 80.55 8,974 110.02 0.0049
2017-05-12 2017-03-31 13F WATERS COM 941848103 57,411 25,613 8,974
2017-02-14 2016-12-31 13F WATERS COM 941848103 31,798 -7,786 -19.67 4,273 -31.89 0.0024
2016-11-14 2016-09-30 13F WATERS COM 941848103 39,584 10,085 34.19 6,274 51.22 0.0037
2016-08-12 2016-06-30 13F WATERS COM 941848103 29,499 -18,208 -38.17 4,149 -34.08 0.0026
2016-05-12 2016-03-31 13F WATERS COM 941848103 47,707 -9,684 -16.87 6,294 -18.50 0.0042
2016-02-16 2015-12-31 13F WATERS COM 941848103 57,391 21,241 58.76 7,723 80.70 0.0050
2015-11-13 2015-09-30 13F WATERS COM 941848103 36,150 3,866 11.97 4,274 3.11 0.0030
2015-08-14 2015-06-30 13F WATERS COM 941848103 32,284 -14,676 -31.25 4,145 -29.00 0.0028
2015-05-14 2015-03-31 13F WATERS COM 941848103 46,960 -9,130 -16.28 5,838 -7.67 0.0040
2015-02-17 2014-12-31 13F WATERS COM 941848103 56,090 56,090 6,323 0.0044
Disclosed Call Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share
Price
Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2017-11-14 2017-06-30 13F/A WATERS COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2017-11-14 2017-03-31 13F/A WATERS COM Call 162,800 25,447 n/a n/a n/a
2017-05-12 2017-03-31 13F WATERS COM Call 162,800 25,447 n/a n/a n/a
2015-05-14 2015-03-31 13F WATERS COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2015-02-17 2014-12-31 13F WATERS COM Call 9,800 1,105 n/a n/a n/a
Disclosed Put Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share Price Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2020-11-12 2020-09-30 13F WATERS COM Put 0 -100.00 0 -100.00 n/a n/a n/a
2020-07-31 2020-06-30 13F WATERS COM Put 1,300 235 n/a n/a n/a
2020-02-14 2019-12-31 13F WATERS COM Put 0 -100.00 0 -100.00 n/a n/a n/a
2019-11-14 2019-09-30 13F WATERS COM Put 1,500 0.00 335 3.72 n/a n/a n/a
2019-08-14 2019-06-30 13F WATERS COM Put 1,500 323 n/a n/a n/a
2017-11-14 2017-03-31 13F/A WATERS COM Put 0 -100.00 0 -100.00 n/a n/a n/a
2017-02-14 2016-12-31 13F WATERS COM Put 8,415 0.00 1,131 n/a n/a n/a
2015-05-14 2015-03-31 13F WATERS COM Put 0 -100.00 0 -100.00 n/a n/a n/a
2015-02-17 2014-12-31 13F WATERS COM Put 19,655 2,216 n/a n/a n/a
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.