NPK 인터내셔널 주식회사
US ˙ NYSE ˙ US6517185046
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SecurityNR / NPK International Inc.
InstitutionUBS Group AG
Latest Disclosed Ownership312,551 shares
Latest Disclosed Value $ 4,528,865
UBS Group AG reports 8.38% increase in ownership of NR / NPK International Inc.

On May 5, 2026 - UBS Group AG filed a 13F-HR form disclosing ownership of 312,551 shares of NPK International Inc. (US:NR) valued at $4,528,865 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 29, 2026 disclosing 288,385 shares of NPK International Inc.. This represents a change in shares of 8.38% during the quarter. The current value of the position is $2,265,995 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)
2026-05-05 2026-03-31 13F NPK INTERNATIONAL COM SHS 651718504 312,551 24,166 8.38 4,529 31.74 0.0001
2026-01-29 2025-12-31 13F NPK INTERNATIONAL COM SHS 651718504 288,385 35,667 14.11 3,438 20.26 0.0006
2025-11-13 2025-09-30 13F NPK INTERNATIONAL COM SHS 651718504 252,718 189,951 302.63 2,858 435.21 0.0004
2025-08-14 2025-06-30 13F NPK INTERNATIONAL COM SHS 651718504 62,767 -187,138 -74.88 534 -63.20 0.0001
2025-05-13 2025-03-31 13F NPK INTERNATIONAL COM SHS 651718504 249,905 -3,425 -1.35 1,452 -25.32 0.0003
2025-02-14 2024-12-31 13F NPK INTERNATIONAL COM SHS 651718504 253,330 76,383 43.17 1,943 58.48 0.0004
2024-11-14 2024-09-30 13F NEWPARK RES COM PAR $.01NEW 651718504 176,947 90,209 104.00 1,226 70.28 0.0003
2024-08-14 2024-06-30 13F NEWPARK RES COM PAR $.01NEW 651718504 86,738 -13,796 -13.72 721 -0.69 0.0002
2024-05-13 2024-03-31 13F NEWPARK RES COM PAR $.01NEW 651718504 100,534 -2,005 -1.96 726 6.62 0.0002
2024-02-09 2023-12-31 13F NEWPARK RES COM PAR $.01NEW 651718504 102,539 44,385 76.32 681 69.58 0.0002
2023-11-09 2023-09-30 13F NEWPARK RES COM PAR $.01NEW 651718504 58,154 14,418 32.97 402 75.88 0.0001
2023-08-11 2023-06-30 13F NEWPARK RES COM PAR $.01NEW 651718504 43,736 10,835 32.93 229 80.95 0.0001
2023-05-12 2023-03-31 13F NEWPARK RES COM PAR $.01NEW 651718504 32,901 -528 -1.58 127 -8.70 0.0000
2023-02-08 2022-12-31 13F NEWPARK RES COM PAR $.01NEW 651718504 33,429 20,019 149.28 139 305.88 0.0001
2022-11-10 2022-09-30 13F NEWPARK RES COM PAR $.01NEW 651718504 13,410 10,583 374.35 34 277.78 0.0000
2022-08-10 2022-06-30 13F NEWPARK RES COM PAR $.01NEW 651718504 2,827 -13,232 -82.40 9 -84.75 0.0000
2022-05-16 2022-03-31 13F NEWPARK RES COM PAR $.01NEW 651718504 16,059 -17,507 -52.16 59 -40.40 0.0000
2022-02-14 2021-12-31 13F NEWPARK RES COM PAR $.01NEW 651718504 33,566 33,236 10,071.52 99 9,800.00 0.0000
2021-11-15 2021-09-30 13F NEWPARK RES COM PAR $.01NEW 651718504 330 -871 -72.52 1 -75.00 0.0000
2021-08-13 2021-06-30 13F NEWPARK RES COM PAR $.01NEW 651718504 1,201 -22,542 -94.94 4 -94.59 0.0000
2021-05-12 2021-03-31 13F NEWPARK RES COM PAR $.01NEW 651718504 23,743 -9,005 -27.50 74 17.46 0.0000
2021-02-11 2020-12-31 13F NEWPARK RES COM PAR $.01NEW 651718504 32,748 -589 -1.77 63 80.00 0.0000
2020-11-12 2020-09-30 13F NEWPARK RES COM PAR $.01NEW 651718504 33,337 -6,561 -16.44 35 -60.67 0.0000
2020-07-31 2020-06-30 13F NEWPARK RES COM PAR $.01NEW 651718504 39,898 -56,323 -58.54 89 3.49 0.0000
2020-05-01 2020-03-31 13F NEWPARK RES COM PAR $.01NEW 651718504 96,221 -68,049 -41.43 86 -91.65 0.0000
2020-02-14 2019-12-31 13F NEWPARK RES COM PAR $.01NEW 651718504 164,270 91,727 126.45 1,030 86.26 0.0004
2019-11-14 2019-09-30 13F NEWPARK RES COM PAR $.01NEW 651718504 72,543 50,891 235.04 553 245.63 0.0002
2019-08-14 2019-06-30 13F NEWPARK RES COM PAR $.01NEW 651718504 21,652 18,218 530.52 160 416.13 0.0001
2019-05-14 2019-03-31 13F NEWPARK RES COM PAR $.01NEW 651718504 3,434 -36,103 -91.31 31 -88.56 0.0000
2019-02-14 2018-12-31 13F NEWPARK RES COM PAR $.01NEW 651718504 39,537 10,909 38.11 271 -8.45 0.0001
2018-11-14 2018-09-30 13F NEWPARK RES COM PAR $.01NEW 651718504 28,628 8,599 42.93 296 36.41 0.0001
2018-08-14 2018-06-30 13F NEWPARK RES COM PAR $.01NEW 651718504 20,029 12,934 182.30 217 280.70 0.0001
2018-05-15 2018-03-31 13F NEWPARK RES COM PAR $.01NEW 651718504 7,095 -8,635 -54.90 57 -57.78 0.0000
2018-02-14 2017-12-31 13F NEWPARK RES COM PAR $.01NEW 651718504 15,730 -3,786 -19.40 135 -31.12 0.0001
2017-11-14 2017-09-30 13F NEWPARK RES COM PAR $.01NEW 651718504 19,516 12,551 180.20 196 284.31 0.0001
2017-11-14 2017-06-30 13F/A-1 NEWPARK RES COM PAR $.01NEW 651718504 6,965 0 0.00 51 -8.93 0.0000
2017-08-14 2017-06-30 13F NEWPARK RES COM PAR $.01NEW 651718504 6,965 0 51
2017-11-14 2017-03-31 13F/A-1 NEWPARK RES COM PAR $.01NEW 651718504 6,965 -15,508 -69.01 56 -66.67 0.0000
2017-05-12 2017-03-31 13F NEWPARK RES COM PAR $.01NEW 651718504 6,965 -15,508 56
2017-02-14 2016-12-31 13F NEWPARK RES COM PAR $.01NEW 651718504 22,473 11,239 100.04 168 104.88 0.0001
2016-11-14 2016-09-30 13F NEWPARK RES COM PAR $.01NEW 651718504 11,234 -4,211 -27.26 82 -8.89 0.0000
2016-08-12 2016-06-30 13F NEWPARK RES COM PAR $.01NEW 651718504 15,445 4,404 39.89 90 87.50 0.0001
2016-05-12 2016-03-31 13F NEWPARK RES COM PAR $.01NEW 651718504 11,041 -695 -5.92 48 -22.58 0.0000
2016-02-16 2015-12-31 13F NEWPARK RES COM PAR $.01NEW 651718504 11,736 621 5.59 62 8.77 0.0000
2015-11-13 2015-09-30 13F NEWPARK RES COM PAR $.01NEW 651718504 11,115 4 0.04 57 -37.36 0.0000
2015-08-14 2015-06-30 13F NEWPARK RES COM PAR $.01NEW 651718504 11,111 -483,334 -97.75 91 -97.98 0.0001
2015-05-14 2015-03-31 13F NEWPARK RES COM PAR $.01NEW 651718504 494,445 70,895 16.74 4,504 11.49 0.0031
2015-02-17 2014-12-31 13F NEWPARK RES COM PAR $.01NEW 651718504 423,550 423,550 4,040 0.0028
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.