NPK International Inc.
US ˙ NYSE ˙ US6517185046
QUESTO SIMBOLO NON E' PIU' ATTIVO

SecurityNR / NPK International Inc.
InstitutionMorgan Stanley
Latest Disclosed Ownership1,823,060 shares
Latest Disclosed Value $ 26,416,153
Morgan Stanley reports 7.68% increase in ownership of NR / NPK International Inc.

On May 15, 2026 - Morgan Stanley filed a 13F-HR form disclosing ownership of 1,823,060 shares of NPK International Inc. (US:NR) valued at $26,416,153 USD as of March 31, 2026. The entity filed a previous 13F-HR/A on May 27, 2026 disclosing 1,693,062 shares of NPK International Inc.. This represents a change in shares of 7.68% during the quarter. The current value of the position is $13,217,185 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)
2026-05-15 2026-03-31 13F NPK INTERNATIONAL COM SHS 651718504 1,823,060 129,998 7.68 26,416 30.90 0.0016
2026-05-27 2025-12-31 13F/A-1 NPK INTERNATIONAL COM SHS 651718504 1,693,062 50,157 3.05 20,181 8.61 0.0012
2026-02-13 2025-12-31 13F NPK INTERNATIONAL COM SHS 651718504 1,693,062 50,157 20,181 0.0012
2026-05-27 2025-09-30 13F/A-1 NPK INTERNATIONAL COM SHS 651718504 1,642,905 -318,066 -16.22 18,581 11.35 0.0011
2025-11-14 2025-09-30 13F NPK INTERNATIONAL COM SHS 651718504 1,642,905 -318,066 18,581 0.0011
2025-08-15 2025-06-30 13F NPK INTERNATIONAL COM SHS 651718504 1,960,971 -116,027 -5.59 16,688 38.29 0.0011
2025-05-15 2025-03-31 13F NPK INTERNATIONAL COM SHS 651718504 2,076,998 -175,289 -7.78 12,067 -30.15 0.0009
2025-05-15 2024-12-31 13F/A-1 NPK INTERNATIONAL COM SHS 651718504 2,252,287 -190,655 -7.80 17,275 2.04 0.0012
2025-02-14 2024-12-31 13F NPK INTERNATIONAL COM SHS 651718504 2,252,287 -190,655 17,275 0.0012
2025-05-14 2024-09-30 13F/A-2 NEWPARK RES COM PAR $.01NEW 651718504 2,442,942 -59,800 -2.39 16,930 -18.60 0.0012
2025-02-14 2024-09-30 13F/A-1 NEWPARK RES COM PAR $.01NEW 651718504 2,442,942 -59,800 16,930 0.0012
2024-11-14 2024-09-30 13F NEWPARK RES COM PAR $.01NEW 651718504 2,442,942 -59,800 16,930 0.0001
2025-05-14 2024-06-30 13F/A-2 NEWPARK RES COM PAR $.01NEW 651718504 2,502,742 655,555 35.49 20,798 55.95 0.0016
2024-10-17 2024-06-30 13F/A-1 NEWPARK RES COM PAR $.01NEW 651718504 2,502,742 655,555 20,798 0.0016
2024-08-14 2024-06-30 13F NEWPARK RES COM PAR $.01NEW 651718504 2,502,742 655,555 20,798 0.0016
2024-10-17 2024-03-31 13F/A-2 NEWPARK RES COM PAR $.01NEW 651718504 1,847,187 -682,531 -26.98 13,337 -20.60 0.0011
2024-08-16 2024-03-31 13F/A-1 NEWPARK RES COM PAR $.01NEW 651718504 1,847,187 -682,531 13,337 0.0001
2024-05-15 2024-03-31 13F NEWPARK RES COM PAR $.01NEW 651718504 1,847,187 -682,531 13,337 0.0011
2024-08-16 2023-12-31 13F/A-1 NEWPARK RES COM PAR $.01NEW 651718504 2,529,718 710,390 39.05 16,797 33.62 0.0015
2024-02-13 2023-12-31 13F NEWPARK RES COM PAR $.01NEW 651718504 2,529,718 710,390 16,797 0.0015
2023-11-15 2023-09-30 13F NEWPARK RES COM PAR $.01NEW 651718504 1,819,328 86,872 5.01 12,572 38.75 0.0013
2023-08-14 2023-06-30 13F NEWPARK RES COM PAR $.01NEW 651718504 1,732,456 169,192 10.82 9,061 50.55 0.0009
2023-05-15 2023-03-31 13F NEWPARK RES COM PAR $.01NEW 651718504 1,563,264 -78,761 -4.80 6,019 -11.68 0.0006
2023-02-14 2022-12-31 13F NEWPARK RES COM PAR $.01NEW 651718504 1,642,025 112,305 7.34 6,814 76.76 0.0008
2022-11-14 2022-09-30 13F NEWPARK RES COM PAR $.01NEW 651718504 1,529,720 -77,642 -4.83 3,855 -22.37 0.0005
2022-10-27 2022-06-30 13F/A-1 NEWPARK RES COM PAR $.01NEW 651718504 1,607,362 -69,774 -4.16 4,966 -19.09 0.0006
2022-08-15 2022-06-30 13F NEWPARK RES COM PAR $.01NEW 651718504 1,607,362 -69,774 4,966 0.0001
2022-10-27 2022-03-31 13F/A-1 NEWPARK RES COM PAR $.01NEW 651718504 1,677,136 -35,518 -2.07 6,138 21.93 0.0008
2022-05-13 2022-03-31 13F NEWPARK RES COM PAR $.01NEW 651718504 1,677,136 -35,518 6,138 0.0008
2022-02-14 2021-12-31 13F NEWPARK RES COM PAR $.01NEW 651718504 1,712,654 -2,064,334 -54.66 5,034 -59.61 0.0006
2021-11-15 2021-09-30 13F NEWPARK RES COM PAR $.01NEW 651718504 3,776,988 98,150 2.67 12,463 -2.08 0.0017
2021-08-23 2021-06-30 13F/A-1 NEWPARK RES COM PAR $.01NEW 651718504 3,678,838 1,644,986 80.88 12,728 99.31 0.0017
2021-08-16 2021-06-30 13F NEWPARK RES COM PAR $.01NEW 651718504 3,678,838 1,644,986 12,728 0.0003
2021-05-17 2021-03-31 13F NEWPARK RES COM PAR $.01NEW 651718504 2,033,852 1,903,527 1,460.60 6,386 2,454.40 0.0009
2021-02-16 2020-12-31 13F NEWPARK RES COM PAR $.01NEW 651718504 130,325 -825,950 -86.37 250 -75.10 0.0000
2020-11-13 2020-09-30 13F NEWPARK RES COM PAR $.01NEW 651718504 956,275 151,514 18.83 1,004 -44.10 0.0002
2020-08-14 2020-06-30 13F NEWPARK RES COM PAR $.01NEW 651718504 804,761 -2,361,073 -74.58 1,796 -36.76 0.0004
2020-05-26 2020-03-31 13F/A-1 NEWPARK RES COM PAR $.01NEW 651718504 3,165,834 2,592,340 452.03 2,840 -21.02 0.0008
2020-05-15 2020-03-31 13F NEWPARK RES COM PAR $.01NEW 651718504 3,165,834 2,592,340 2,840 218.1712
2020-02-14 2019-12-31 13F NEWPARK RES COM PAR $.01NEW 651718504 573,494 231,318 67.60 3,596 37.94 0.0008
2019-11-14 2019-09-30 13F NEWPARK RES COM PAR $.01NEW 651718504 342,176 -74,202 -17.82 2,607 -15.63 0.0007
2019-08-14 2019-06-30 13F NEWPARK RES COM PAR $.01NEW 651718504 416,378 367,105 745.04 3,090 585.14 0.0008
2019-05-15 2019-03-31 13F NEWPARK RES COM PAR $.01NEW 651718504 49,273 -111,423 -69.34 451 -59.15 0.0001
2019-02-14 2018-12-31 13F NEWPARK RES COM PAR $.01NEW 651718504 160,696 -61,465 -27.67 1,104 -51.96 0.0003
2019-04-23 2018-09-30 13F/A-2 NEWPARK RES COM PAR $.01NEW 651718504 222,161 -120,211 -35.11 2,298 -38.14 0.0006
2018-11-20 2018-09-30 13F/A-1 NEWPARK RES COM PAR $.01NEW 651718504 222,161 0 2,298 0.0006
2018-11-14 2018-09-30 13F NEWPARK RES COM PAR $.01NEW 651718504 222,161 -120,211 2,298
2019-04-23 2018-06-30 13F/A-1 NEWPARK RES COM PAR $.01NEW 651718504 342,372 -78,680 -18.69 3,715 8.98 0.0010
2018-08-14 2018-06-30 13F NEWPARK RES COM PAR $.01NEW 651718504 342,372 -78,680 3,715
2019-04-23 2018-03-31 13F/A-1 NEWPARK RES COM PAR $.01NEW 651718504 421,052 66,981 18.92 3,409 11.95 0.0009
2018-05-14 2018-03-31 13F NEWPARK RES COM PAR $.01NEW 651718504 421,052 66,981 3,409
2019-04-23 2017-12-31 13F/A-1 NEWPARK RES COM PAR $.01NEW 651718504 354,071 160,229 82.66 3,045 57.12 0.0008
2018-02-14 2017-12-31 13F NEWPARK RES COM PAR $.01NEW 651718504 354,071 160,229 3,045
2017-11-14 2017-09-30 13F NEWPARK RES COM PAR $.01NEW 651718504 193,842 10,221 5.57 1,938 43.66 0.0006
2017-08-11 2017-06-30 13F NEWPARK RES COM PAR $.01NEW 651718504 183,621 44,068 31.58 1,349 19.38 0.0004
2017-05-22 2017-03-31 13F/A-1 NEWPARK RES COM PAR $.01NEW 651718504 139,553 -223,804 -61.59 1,130 -58.55 0.0003
2017-05-12 2017-03-31 13F NEWPARK RES COM PAR $.01NEW 651718504 139,553 1,130
2017-02-22 2016-12-31 13F/A-1 NEWPARK RES COM PAR $.01NEW 651718504 363,357 253,873 231.88 2,726 238.63 0.0009
2017-02-13 2016-12-31 13F NEWPARK RES COM PAR $.01NEW 651718504 363,357 2,726
2016-11-10 2016-09-30 13F NEWPARK RES COM PAR $.01NEW 651718504 109,484 101,293 1,236.64 805 1,577.08 0.0003
2016-08-12 2016-06-30 13F NEWPARK RES COM PAR $.01NEW 651718504 8,191 -104,168 -92.71 48 -90.12 0.0000
2016-05-12 2016-03-31 13F NEWPARK RES COM PAR $.01NEW 651718504 112,359 89,205 385.27 486 298.36 0.0002
2016-02-09 2015-12-31 13F NEWPARK RES COM PAR $.01NEW 651718504 23,154 -530,614 -95.82 122 -95.70 0.0000
2016-02-08 2015-09-30 13F/A-1 NEWPARK RES COM PAR $.01NEW 651718504 553,768 396,384 251.86 2,835 121.48 0.0010
2015-11-09 2015-09-30 13F NEWPARK RES COM PAR $.01NEW 651718504 553,768 2,835
2015-08-12 2015-06-30 13F NEWPARK RES COM PAR $.01NEW 651718504 157,384 -99,265 -38.68 1,280 -45.25 0.0004
2015-05-14 2015-03-31 13F NEWPARK RES COM PAR $.01NEW 651718504 256,649 129,843 102.39 2,338 93.22 0.0009
2015-02-13 2014-12-31 13F NEWPARK RES COM PAR $.01NEW 651718504 126,806 48,605 62.15 1,210 24.36 0.0004
2014-12-16 2014-09-30 13F/A-1 NEWPARK RES COM PAR $.01NEW 651718504 78,201 -234,682 -75.01 973 -72.84 0.0004
2014-11-14 2014-09-30 13F NEWPARK RES COM PAR $.01NEW 651718504 78,201 973
2014-05-13 2014-03-31 13F NEWPARK RES COM PAR $.01NEW 651718504 312,883 272,892 682.38 3,583 629.74 0.0015
2014-02-13 2013-12-31 13F NEWPARK RES COM PAR $.01NEW 651718504 39,991 -4,872 -10.86 491 -13.71 0.0002
2013-11-13 2013-09-30 13F NEWPARK RESOURCES INC COM S COM 651718504 44,863 -62,121 -58.07 569 -51.62 0.0003
2013-08-08 2013-06-30 13F NEWPARK RESOURCES INC COM S COM 651718504 106,984 106,984 1,176 0.0006
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.