워터스 코퍼레이션
MX ˙ BMV ˙ US9418481035
SecurityMX:WAT / Waters Corporation
InstitutionOstrum Asset Management
Latest Disclosed Ownership4,285 shares
Latest Disclosed Value $ 1,276,073
Ostrum Asset Management reports 833.55% increase in ownership of WAT / Waters Corporation

On May 14, 2026 - Ostrum Asset Management filed a 13F-HR form disclosing ownership of 4,285 shares of Waters Corporation (MX:WAT) valued at $1,276,073 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 459 shares of Waters Corporation. This represents a change in shares of 833.55% 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)
2026-05-14 2026-03-31 13F WATERS Common Stock 941848103 4,285 3,826 833.55 1,276 633.33 0.0716
2026-02-13 2025-12-31 13F WATERS Common Stock 941848103 459 -154 -25.12 174 -4.92 0.0084
2025-11-14 2025-09-30 13F WATERS Common Stock 941848103 613 -20 -3.16 184 -16.82 0.0083
2025-08-13 2025-06-30 13F WATERS Common Stock 941848103 633 -18 -2.76 221 -7.95 0.0104
2025-05-14 2025-03-31 13F WATERS Common Stock 941848103 651 -17 -2.54 240 -3.24 0.0126
2025-02-13 2024-12-31 13F WATERS Common Stock 941848103 668 -1,422 -68.04 248 -67.15 0.0215
2024-11-13 2024-09-30 13F WATERS Common Stock 941848103 2,090 25 1.21 752 25.54 0.0622
2024-08-13 2024-06-30 13F WATERS Common Stock 941848103 2,065 -1,729 -45.57 599 -54.13 0.0522
2024-05-13 2024-03-31 13F WATERS Common Stock 941848103 3,794 0 0.00 1,306 4.56 0.1032
2024-02-13 2023-12-31 13F WATERS Common Stock 941848103 3,794 -1,564 -29.19 1,249 -14.98 0.1086
2023-11-14 2023-09-30 13F WATERS Common Stock 941848103 5,358 2,449 84.19 1,469 89.55 0.1360
2023-08-11 2023-06-30 13F WATERS Common Stock 941848103 2,909 1 0.03 775 -13.89 0.0650
2023-05-12 2023-03-31 13F WATERS Common Stock 941848103 2,908 2,908 900 0.0784
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.