Waters Corporation
MX ˙ BMV ˙ US9418481035
SecurityMX:WAT / Waters Corporation
InstitutionHeadinvest, Llc
Latest Disclosed Ownership16,970 shares
Latest Disclosed Value $ 5,053,666
Headinvest, Llc reports 2.16% decrease in ownership of WAT / Waters Corporation

On May 15, 2026 - Headinvest, Llc filed a 13F-HR form disclosing ownership of 16,970 shares of Waters Corporation (MX:WAT) valued at $5,053,666 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 2, 2026 disclosing 17,344 shares of Waters Corporation. This represents a change in shares of -2.16% 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.

Upgrade to unlock premium data and export to Excel .

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 16,970 -374 -2.16 5,054 -23.29 1.0366
2026-02-02 2025-12-31 13F WATERS COM 941848103 17,344 -171 -0.98 6,588 25.44 1.3101
2025-11-14 2025-09-30 13F WATERS COM 941848103 17,515 -258 -1.45 5,251 -15.35 1.0855
2025-08-14 2025-06-30 13F WATERS COM 941848103 17,773 -2,825 -13.71 6,203 -18.28 1.3216
2025-05-15 2025-03-31 13F WATERS COM 941848103 20,598 -469 -2.23 7,592 -2.87 1.4761
2025-02-18 2024-12-31 13F WATERS COM 941848103 21,067 -600 -2.77 7,815 0.23 1.4750
2024-11-15 2024-09-30 13F WATERS COM 941848103 21,667 -879 -3.90 7,798 19.20 1.4429
2024-08-14 2024-06-30 13F WATERS COM 941848103 22,546 -436 -1.90 6,541 -17.32 1.2880
2024-08-14 2024-03-31 13F WATERS COM 941848103 22,982 -2,276 -9.01 7,911 -4.86 1.5440
2024-02-12 2023-12-31 13F WATERS CORP COM Stock 941848103 25,258 -126 -0.50 8,316 21.10 1.7297
2023-12-11 2023-09-30 13F WATERS CORP COM Stock 941848103 25,384 15 0.06 6,867 -7.20 1.4916
2023-08-23 2023-06-30 13F WATERS CORP COM Stock 941848103 25,369 350 1.40 7,399 -4.48 1.5947
2023-05-17 2023-03-31 13F WATERS CORP COM Stock 941848103 25,019 -604 -2.36 7,747 -11.75 1.6993
2023-02-13 2022-12-31 13F WATERS CORP COM Stock 941848103 25,623 57 0.22 8,778 27.37 1.9645
2022-12-28 2022-09-30 13F WATERS CORP COM Stock 941848103 25,566 50 0.20 6,891 -18.40 1.6509
2022-08-12 2022-06-30 13F WATERS CORP COM Stock 941848103 25,516 -168 -0.65 8,445 5.93 1.8792
2022-05-13 2022-03-31 13F WATERS CORP COM Stock 941848103 25,684 -20 -0.08 7,972 -16.76 1.5235
2022-02-11 2021-12-31 13F WATERS CORP COM Stock 941848103 25,704 -979 -3.67 9,577 0.45 1.6989
2021-11-16 2021-09-30 13F WATERS CORP COM Stock 941848103 26,683 -414 -1.53 9,534 1.82 1.8078
2021-08-30 2021-06-30 13F WATERS CORP COM Stock 941848103 27,097 -256 -0.94 9,364 20.48 1.7810
2021-05-13 2021-03-31 13F WATERS CORP COM Stock 941848103 27,353 -770 -2.74 7,772 11.70 1.5861
2021-02-16 2020-12-31 13F/A-1 Waters COM 941848103 28,123 799 2.92 6,958 30.13 1.4767
2021-02-16 2020-12-31 13F Waters COM 941848103 27,324 5,347 1.5453
2020-11-24 2020-09-30 13F Waters COM 941848103 27,324 -315 -1.14 5,347 7.24 1.5453
2020-08-12 2020-06-30 13F Waters COM 941848103 27,639 -261 -0.94 4,986 -1.83 1.5708
2020-05-12 2020-03-31 13F/A-1 Waters COM 941848103 27,900 -677 -2.37 5,079 -23.93 1.9012
2020-05-11 2020-03-31 13F Waters COM 941848103 30,549 1,972 7,689 2,154,336.6918
2020-02-14 2019-12-31 13F Waters COM 941848103 28,577 -312 -1.08 6,677 3.54 1.9170
2019-11-21 2019-09-30 13F Waters COM 941848103 28,889 -1,225 -4.07 6,449 -0.51 1.9557
2019-08-22 2019-06-30 13F Waters COM 941848103 30,114 -435 -1.42 6,482 -15.70 1.8335
2019-05-15 2019-03-31 13F Waters COM 941848103 30,549 -31,859 -51.05 7,689 -34.69 2.1543
2019-02-22 2018-12-31 13F Waters COM 941848103 62,408 30,379 94.85 11,773 88.82 1.8648
2018-11-14 2018-09-30 13F Waters COM 941848103 32,029 23 0.07 6,235 0.63 1.7940
2018-08-09 2018-06-30 13F Waters COM 941848103 32,006 -785 -2.39 6,196 -4.88 1.8888
2018-04-09 2018-03-31 13F Waters COM 941848103 32,791 -952 -2.82 6,514 -0.08 2.0889
2018-01-30 2017-12-31 13F Waters COM 941848103 33,743 -582 -1.70 6,519 -3.12 2.0106
2017-11-13 2017-09-30 13F Waters COM 941848103 34,325 -312 -0.90 6,729 5.67 2.1072
2017-07-18 2017-06-30 13F Waters COM 941848103 34,637 -330 -0.94 6,368 16.50 2.0978
2017-04-25 2017-03-31 13F Waters COM 941848103 34,967 -435 -1.23 5,466 14.88 1.8368
2017-01-24 2016-12-31 13F Waters COM 941848103 35,402 -849 -2.34 4,758 -17.40 1.7694
2016-10-11 2016-09-30 13F Waters COM 941848103 36,251 -8,503 -19.00 5,760 -8.50 2.0427
2016-07-26 2016-06-30 13F Waters COM 941848103 44,754 -640 -1.41 6,295 5.13 2.3821
2016-04-21 2016-03-31 13F Waters COM 941848103 45,394 -350 -0.77 5,988 -2.73 2.3434
2016-01-20 2015-12-31 13F Waters COM 941848103 45,744 -2,911 -5.98 6,156 7.02 2.4949
2015-10-16 2015-09-30 13F Waters COM 941848103 48,655 -1,155 -2.32 5,752 -10.05 2.3095
2015-08-07 2015-06-30 13F Waters COM 941848103 49,810 -1,188 -2.33 6,395 0.87 2.3677
2015-05-14 2015-03-31 13F Waters COM 941848103 50,998 -530 -1.03 6,340 9.16 2.2747
2015-02-10 2014-12-31 13F Waters COM 941848103 51,528 -590 -1.13 5,808 0.57 2.3161
2014-11-12 2014-09-30 13F Waters COM 941848103 52,118 -300 -0.57 5,775 5.48 2.3082
2014-07-31 2014-06-30 13F Waters COM 941848103 52,418 1,973 3.91 5,475 0.11 2.2149
2014-05-07 2014-03-31 13F Waters COM 941848103 50,445 -3,001 -5.62 5,469 2.32 2.3547
2014-02-12 2013-12-31 13F Waters COM 941848103 53,446 -1,635 -2.97 5,345 -8.63 2.2526
2013-11-15 2013-09-30 13F Waters COM 941848103 55,081 -2,290 -3.99 5,850 1.92 2.5510
2013-07-30 2013-06-30 13F Waters COM 941848103 57,371 57,371 5,740 2.5257
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.