Flowserve Corporation
US ˙ NYSE ˙ US34354P1057

SecurityFLS / Flowserve Corporation
InstitutionSquarepoint Ops LLC
Latest Disclosed Ownership0 shares
Latest Disclosed Value $ 0
Squarepoint Ops LLC ownership in FLS / Flowserve Corporation

On May 15, 2026 - Squarepoint Ops LLC filed a 13F-HR form disclosing ownership of 0 shares of Flowserve Corporation (US:FLS) valued at $0 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 60,435 shares of Flowserve Corporation. This represents a change in shares of -100.00% during the quarter. The current value of the position is $0 USD.

Squarepoint Ops LLC has a history of taking positions in derivatives of the underlying security (FLS) in the form of stock options. The firm currently holds call options representing 6,600 of underlying shares valued at $485,166 USD and put options representing 4,100 of underlying shares valued at $301,391 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.

FLS / Flowserve 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)
2026-05-15 2026-03-31 13F FLOWSERVE COM 34354P105 0 -60,435 -100.00 0 -100.00
2026-02-13 2025-12-31 13F FLOWSERVE COM 34354P105 60,435 -385,634 -86.45 4,193 -82.32 0.0045
2025-11-14 2025-09-30 13F FLOWSERVE COM 34354P105 446,069 -56,196 -11.19 23,704 -9.85 0.0238
2025-08-27 2025-06-30 13F/A-1 FLOWSERVE COM 34354P105 502,265 82,363 19.61 26,294 28.21 0.0273
2025-08-14 2025-06-30 13F FLOWSERVE COM 34354P105 502,265 82,363 26,294 0.0273
2025-08-27 2025-03-31 13F/A-1 FLOWSERVE COM 34354P105 419,902 395,611 1,628.63 20,508 1,368.00 0.0249
2025-05-15 2025-03-31 13F FLOWSERVE COM 34354P105 419,902 395,611 20,508 0.0249
2025-02-14 2024-12-31 13F FLOWSERVE COM 34354P105 24,291 -58,583 -70.69 1,397 -67.38 0.0014
2024-11-14 2024-09-30 13F FLOWSERVE COM 34354P105 82,874 39,451 90.85 4,284 105.12 0.0067
2024-08-14 2024-06-30 13F FLOWSERVE COM 34354P105 43,423 -123,769 -74.03 2,089 -72.66 0.0035
2024-05-15 2024-03-31 13F FLOWSERVE COM 34354P105 167,192 139,974 514.27 7,637 581.27 0.0131
2024-02-14 2023-12-31 13F FLOWSERVE COM 34354P105 27,218 -140,484 -83.77 1,122 -83.19 0.0021
2023-11-14 2023-09-30 13F FLOWSERVE COM 34354P105 167,702 -104,573 -38.41 6,670 -34.07 0.0165
2023-08-14 2023-06-30 13F FLOWSERVE COM 34354P105 272,275 -59,883 -18.03 10,115 -10.43 0.0310
2023-05-15 2023-03-31 13F FLOWSERVE COM 34354P105 332,158 204,085 159.35 11,293 187.43 0.0460
2023-02-14 2022-12-31 13F FLOWSERVE COM 34354P105 128,073 128,073 3,929 0.0155
2022-11-14 2022-09-30 13F FLOWSERVE COM 34354P105 0 -78,118 -100.00 0 -100.00
2022-08-15 2022-06-30 13F FLOWSERVE COM 34354P105 78,118 30,451 63.88 2,237 30.74 0.0124
2022-05-16 2022-03-31 13F FLOWSERVE COM 34354P105 47,667 -260,383 -84.53 1,711 -81.85 0.0073
2022-02-14 2021-12-31 13F FLOWSERVE COM 34354P105 308,050 86,885 39.29 9,426 22.93 0.0249
2021-11-15 2021-09-30 13F FLOWSERVE COM 34354P105 221,165 78,226 54.73 7,668 33.06 0.0220
2021-08-16 2021-06-30 13F FLOWSERVE COM 34354P105 142,939 6,483 4.75 5,763 8.82 0.0219
2021-05-17 2021-03-31 13F FLOWSERVE COM 34354P105 136,456 76,110 126.12 5,296 138.13 0.0310
2021-02-16 2020-12-31 13F FLOWSERVE COM 34354P105 60,346 -103,723 -63.22 2,224 -50.32 0.0166
2020-11-16 2020-09-30 13F FLOWSERVE COM 34354P105 164,069 59,477 56.87 4,477 50.08 0.0603
2020-08-14 2020-06-30 13F FLOWSERVE COM 34354P105 104,592 -3,133 -2.91 2,983 15.89 0.0483
2020-05-15 2020-03-31 13F FLOWSERVE COM 34354P105 107,725 50,245 87.41 2,574 -10.03 0.0658
2020-02-14 2019-12-31 13F FLOWSERVE COM 34354P105 57,480 57,480 2,861 0.0170
2019-05-15 2019-03-31 13F FLOWSERVE COM 34354P105 0 -21,879 -100.00 0 -100.00
2019-02-14 2018-12-31 13F FLOWSERVE COM 34354P105 21,879 15,747 256.80 832 148.36 0.0097
2018-11-14 2018-09-30 13F FLOWSERVE COM 34354P105 6,132 -24,098 -79.72 335 -72.56 0.0040
2018-08-14 2018-06-30 13F FLOWSERVE COM 34354P105 30,230 30,230 1,221 0.0162
2018-05-15 2018-03-31 13F FLOWSERVE COM 34354P105 0 -6,843 -100.00 0 -100.00
2018-02-14 2017-12-31 13F FLOWSERVE COM 34354P105 6,843 6,843 288 0.0050
2017-11-14 2017-09-30 13F FLOWSERVE COM 34354P105 0 -10,200 -100.00 0 -100.00
2017-08-14 2017-06-30 13F FLOWSERVE COM 34354P105 10,200 10,200 474 0.0093
2015-11-16 2015-09-30 13F FLOWSERVE COM 34354P105 0 -10,300 -100.00 0 -100.00
2015-08-14 2015-06-30 13F FLOWSERVE COM 34354P105 10,300 2,908 39.34 542 29.67 0.1759
2015-05-19 2015-03-31 13F/A-1 FLOWSERVE COM 34354P105 7,392 7,392 418 0.1464
2015-05-15 2015-03-31 13F FLOWSERVE COM 34354P105 7,392 0 418 0.1464
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
(%)
2026-05-15 2026-03-31 13F FLOWSERVE COM Call 6,600 485 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
(%)
2026-05-15 2026-03-31 13F FLOWSERVE COM Put 4,100 301 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.