Flowserve Corporation
US ˙ NYSE ˙ US34354P1057

SecurityFLS / Flowserve Corporation
InstitutionNatixis Advisors, L.p.
Latest Disclosed Ownership67,408 shares
Latest Disclosed Value $ 4,956
Natixis Advisors, L.p. reports 14.16% increase in ownership of FLS / Flowserve Corporation

On May 13, 2026 - Natixis Advisors, L.p. filed a 13F-HR form disclosing ownership of 67,408 shares of Flowserve Corporation (US:FLS) valued at $4,955,162 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 10, 2026 disclosing 59,047 shares of Flowserve Corporation. This represents a change in shares of 14.16% during the quarter. The current value of the position is $5,083,911 USD.

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)
2026-05-13 2026-03-31 13F FLOWSERVE COM 34354P105 67,408 8,361 14.16 5 0.00 0.0069
2026-02-10 2025-12-31 13F FLOWSERVE COM 34354P105 59,047 -21,741 -26.91 4 0.00 0.0058
2025-11-13 2025-09-30 13F FLOWSERVE CORP COM 34354P105 80,788 16,246 25.17 4 33.33 0.0063
2025-08-13 2025-06-30 13F FLOWSERVE COM 34354P105 64,542 -4,178 -6.08 3 0.00 0.0054
2025-05-08 2025-03-31 13F FLOWSERVE COM 34354P105 68,720 -8,989 -11.57 3 -25.00 0.0062
2025-02-10 2024-12-31 13F FLOWSERVE COM 34354P105 77,709 34,738 80.84 4 100.00 0.0084
2024-11-06 2024-09-30 13F FLOWSERVE COR COM 34354P105 42,971 -27,894 -39.36 2 -33.33 0.0043
2024-08-01 2024-06-30 13F FLOWSERVE COM 34354P105 70,865 51,526 266.44 3 0.0074
2024-04-25 2024-03-31 13F FLOWSERVE COM 34354P105 19,339 19,339 1 0.0020
2022-11-14 2022-09-30 13F FLOWSERVE COM 34354P105 0 -11,218 -100.00 0 -100.00
2022-08-12 2022-06-30 13F FLOWSERVE COM 34354P105 11,218 11,218 321 0.0014
2021-08-12 2021-06-30 13F FLOWSERVE COM 34354P105 0 -20,685 -100.00 0 -100.00
2021-05-05 2021-03-31 13F FLOWSERVE COM 34354P105 20,685 -259 -1.24 802 3.89 0.0042
2021-02-12 2020-12-31 13F FLOWSERVE COM 34354P105 20,944 899 4.48 772 41.13 0.0044
2020-11-12 2020-09-30 13F FLOWSERVE COR COM 34354P105 20,045 914 4.78 547 0.18 0.0034
2020-08-11 2020-06-30 13F FLOWSERVE COM 34354P105 19,131 -2,759 -12.60 546 4.40 0.0036
2020-04-27 2020-03-31 13F FLOWSERVE COR COM 34354P105 21,890 21,890 523 0.0043
2019-05-15 2019-03-31 13F/A-1 FLOWSERVE COM 34354P105 0 -22,918 -100.00 0 -100.00
2019-02-13 2018-12-31 13F/A-1 FLOWSERVE COM 34354P105 22,918 -4,764 -17.21 871 -42.47 0.0086
2019-02-13 2018-12-31 13F FLOWSERVE COM 34354P105 22,918 -4,764 871
2018-11-13 2018-09-30 13F FLOWSERVE COM 34354P105 27,682 -6,805 -19.73 1,514 8.69 0.0133
2018-08-14 2018-06-30 13F/A-1 FLOWSERVE COM 34354P105 34,487 -991 -2.79 1,393 -9.37 0.0133
2018-08-14 2018-06-30 13F FLOWSERVE COM 34354P105 34,487 1,393
2018-05-10 2018-03-31 13F FLOWSERVE COM 34354P105 35,478 -2,564 -6.74 1,537 -4.12 0.0152
2018-02-14 2017-12-31 13F FLOWSERVE COM 34354P105 38,042 5,656 17.46 1,603 16.24 0.0163
2017-11-14 2017-09-30 13F FLOWSERVE COM 34354P105 32,386 1,195 3.83 1,379 -4.77 0.0146
2017-07-27 2017-06-30 13F FLOWSERVE COM 34354P105 31,191 -2,396 -7.13 1,448 -10.95 0.0157
2017-05-12 2017-03-31 13F FLOWSERVE COM 34354P105 33,587 56 0.17 1,626 0.93 0.0180
2017-02-07 2016-12-31 13F FLOWSERVE COM 34354P105 33,531 -273 -0.81 1,611 -1.23 0.0194
2016-11-04 2016-09-30 13F FLOWSERVE COM 34354P105 33,804 -2,660 -7.29 1,631 -0.97 0.0211
2016-08-01 2016-06-30 13F FLOWSERVE COM 34354P105 36,464 800 2.24 1,647 3.98 0.0228
2016-05-06 2016-03-31 13F FLOWSERVE COM 34354P105 35,664 7,983 28.84 1,584 35.97 0.0237
2016-02-12 2015-12-31 13F FLOWSERVE COM 34354P105 27,681 -3,858 -12.23 1,165 -10.25 0.0191
2015-11-12 2015-09-30 13F FLOWSERVE COM 34354P105 31,539 4,685 17.45 1,298 -8.20 0.0225
2015-08-14 2015-06-30 13F FLOWSERVE COM 34354P105 26,854 -4,075 -13.18 1,414 -19.06 0.0240
2015-05-15 2015-03-31 13F FLOWSERVE COM 34354P105 30,929 1,734 5.94 1,747 0.00 0.0307
2015-02-05 2014-12-31 13F FLOWSERVE COM 34354P105 29,195 -21,194 -42.06 1,747 -50.83 0.0327
2014-11-03 2014-09-30 13F FLOWSERVE COM 34354P105 50,389 -11,931 -19.14 3,553 -23.33 0.0713
2014-08-13 2014-06-30 13F FLOWSERVE COM 34354P105 62,320 4,053 6.96 4,634 1.51 0.0664
2014-05-13 2014-03-31 13F FLOWSERVE COM 34354P105 58,267 2,049 3.64 4,565 3.00 0.0703
2014-02-12 2013-12-31 13F FLOWSERVE COM 34354P105 56,218 4,929 9.61 4,432 38.50 0.0725
2013-10-30 2013-09-30 13F FLOWSERVE COM 34354P105 51,289 -585 -1.13 3,200 14.20 0.0589
2013-07-19 2013-06-30 13F FLOWSERVE COM 34354P105 51,874 51,874 2,802 0.0558
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.