NPK International Inc.
US ˙ NYSE ˙ US6517185046

SecurityNPKI / NPK International Inc.
InstitutionPrudential Financial Inc
Latest Disclosed Ownership1,686,629 shares
Latest Disclosed Value $ 24,439,254
Prudential Financial Inc reports 12.10% decrease in ownership of NPKI / NPK International Inc.

On May 13, 2026 - Prudential Financial Inc filed a 13F-HR form disclosing ownership of 1,686,629 shares of NPK International Inc. (US:NPKI) valued at $24,439,254 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 1,918,912 shares of NPK International Inc.. This represents a change in shares of -12.10% during the quarter. The current value of the position is $24,658,516 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 NPK INTERNATIONAL COM SHS 651718504 1,686,629 -232,283 -12.10 24,439 6.85 0.0169
2026-02-13 2025-12-31 13F NPK INTERNATIONAL COM SHS 651718504 1,918,912 91,367 5.00 22,873 10.66 0.0276
2025-11-13 2025-09-30 13F NPK INTERNATIONAL COM SHS 651718504 1,827,545 1,413,312 341.19 20,670 486.35 0.0246
2025-08-12 2025-06-30 13F NPK INTERNATIONAL COM SHS 651718504 414,233 345,299 500.91 3,525 781.25 0.0046
2025-05-13 2025-03-31 13F NPK INTERNATIONAL COM SHS 651718504 68,934 140 0.20 401 -24.10 0.0006
2025-02-11 2024-12-31 13F NPK INTERNATIONAL COM SHS 651718504 68,794 -57,200 -45.40 528 -39.63 0.0007
2024-11-14 2024-09-30 13F NEWPARK RES COM PAR $.01NEW 651718504 125,994 -68,100 -35.09 873 -45.84 0.0012
2024-08-13 2024-06-30 13F NEWPARK RES COM PAR $.01NEW 651718504 194,094 -15,375 -7.34 1,613 6.61 0.0024
2024-05-14 2024-03-31 13F NEWPARK RES COM PAR $.01NEW 651718504 209,469 13,250 6.75 1,512 16.13 0.0021
2024-02-13 2023-12-31 13F NEWPARK RES COM PAR $.01NEW 651718504 196,219 -300,000 -60.46 1,303 -62.02 0.0020
2023-11-13 2023-09-30 13F NEWPARK RES COM PAR $.01NEW 651718504 496,219 192,595 63.43 3,429 116.01 0.0054
2023-08-11 2023-06-30 13F NEWPARK RES COM PAR $.01NEW 651718504 303,624 47,000 18.31 1,588 60.63 0.0023
2023-05-12 2023-03-31 13F NEWPARK RES COM PAR $.01NEW 651718504 256,624 15,850 6.58 988 -1.10 0.0015
2023-02-14 2022-12-31 13F NEWPARK RES COM PAR $.01NEW 651718504 240,774 -128,500 -34.80 999 7.42 0.0017
2022-11-04 2022-09-30 13F NEWPARK RES COM PAR $.01NEW 651718504 369,274 41,205 12.56 930 -8.28 0.0016
2022-08-15 2022-06-30 13F NEWPARK RES COM PAR $.01NEW 651718504 328,069 -99,200 -23.22 1,014 -35.17 0.0016
2022-05-13 2022-03-31 13F NEWPARK RES COM PAR $.01NEW 651718504 427,269 19,600 4.81 1,564 30.55 0.0021
2022-02-14 2021-12-31 13F NEWPARK RES COM PAR $.01NEW 651718504 407,669 -301,447 -42.51 1,198 -48.80 0.0015
2021-11-15 2021-09-30 13F NEWPARK RES COM PAR $.01NEW 651718504 709,116 9,730 1.39 2,340 -3.31 0.0033
2021-08-16 2021-06-30 13F NEWPARK RES COM PAR $.01NEW 651718504 699,386 201,700 40.53 2,420 54.83 0.0033
2021-05-12 2021-03-31 13F NEWPARK RES COM PAR $.01NEW 651718504 497,686 482,368 3,149.03 1,563 5,289.66 0.0023
2021-08-16 2020-12-31 13F/A-1 NEWPARK RES COM PAR $.01NEW 0001 651718504 15,318 -96,570 -86.31 29 -75.21 0.0000
2021-02-16 2020-12-31 13F NEWPARK RES COM PAR $.01NEW 651718504 15,318 -96,570 29 0.0000
2020-11-16 2020-09-30 13F NEWPARK RES COM PAR $.01NEW 651718504 111,888 2,210 2.01 117 -52.24 0.0002
2020-08-12 2020-06-30 13F NEWPARK RES COM PAR $.01NEW 651718504 109,678 -41,674 -27.53 245 81.48 0.0005
2020-05-12 2020-03-31 13F NEWPARK RES COM PAR $.01NEW 651718504 151,352 10,783 7.67 135 -84.68 0.0003
2020-02-11 2019-12-31 13F NEWPARK RES COM PAR $.01NEW 651718504 140,569 -810 -0.57 881 -18.20 0.0013
2019-11-13 2019-09-30 13F NEWPARK RES COM PAR $.01NEW 651718504 141,379 -4,613 -3.16 1,077 -0.55 0.0017
2019-08-08 2019-06-30 13F NEWPARK RES COM PAR $.01NEW 651718504 145,992 -400 -0.27 1,083 -19.24 0.0017
2019-05-15 2019-03-31 13F NEWPARK RES COM PAR $.01NEW 651718504 146,392 -307 -0.21 1,341 33.04 0.0022
2019-02-07 2018-12-31 13F NEWPARK RES COM PAR $.01NEW 651718504 146,699 -2,420 -1.62 1,008 -34.67 0.0018
2018-11-07 2018-09-30 13F NEWPARK RES COM PAR $.01NEW 651718504 149,119 290 0.19 1,543 -4.46 0.0023
2018-08-13 2018-06-30 13F NEWPARK RES COM PAR $.01NEW 651718504 148,829 3,530 2.43 1,615 37.21 0.0024
2018-05-04 2018-03-31 13F NEWPARK RES COM PAR $.01NEW 651718504 145,299 6,850 4.95 1,177 -1.18 0.0018
2018-02-13 2017-12-31 13F NEWPARK RES COM PAR $.01NEW 651718504 138,449 -2,950 -2.09 1,191 -15.77 0.0016
2017-11-02 2017-09-30 13F NEWPARK RES COM PAR $.01NEW 651718504 141,399 -6,280 -4.25 1,414 30.32 0.0023
2017-08-07 2017-06-30 13F NEWPARK RES COM PAR $.01NEW 651718504 147,679 4,050 2.82 1,085 -6.71 0.0016
2017-05-10 2017-03-31 13F NEWPARK RES COM PAR $.01NEW 651718504 143,629 350 0.24 1,163 8.19 0.0018
2017-02-07 2016-12-31 13F NEWPARK RES COM PAR $.01NEW 651718504 143,279 -3,640 -2.48 1,075 -0.56 0.0017
2016-11-04 2016-09-30 13F NEWPARK RES COM PAR $.01NEW 651718504 146,919 -55,000 -27.24 1,081 -7.53 0.0018
2016-08-09 2016-06-30 13F NEWPARK RES COM PAR $.01NEW 651718504 201,919 -19,541 -8.82 1,169 22.15 0.0020
2016-05-09 2016-03-31 13F NEWPARK RES COM PAR $.01NEW 651718504 221,460 -13,400 -5.71 957 -22.82 0.0017
2016-02-12 2015-12-31 13F NEWPARK RES COM PAR $.01NEW 651718504 234,860 -348,399 -59.73 1,240 -58.47 0.0022
2015-11-10 2015-09-30 13F NEWPARK RES COM PAR $.01NEW 651718504 583,259 -126,000 -17.77 2,986 -48.21 0.0059
2015-08-06 2015-06-30 13F NEWPARK RES COM PAR $.01NEW 651718504 709,259 -33,500 -4.51 5,766 -14.79 0.0102
2015-05-01 2015-03-31 13F NEWPARK RES COM PAR $.01NEW 651718504 742,759 523,900 239.38 6,767 224.09 0.0117
2015-02-06 2014-12-31 13F NEWPARK RES COM PAR $.01NEW 651718504 218,859 36,600 20.08 2,088 -7.90 0.0038
2014-11-12 2014-09-30 13F NEWPARK RES COM PAR $.01NEW 651718504 182,259 -14,333 -7.29 2,267 -7.47 0.0043
2014-08-13 2014-06-30 13F NEWPARK RES COM PAR $.01NEW 651718504 196,592 1,033 0.53 2,450 9.42 0.0043
2014-05-14 2014-03-31 13F NEWPARK RES COM PAR $.01NEW 651718504 195,559 -2,200 -1.11 2,239 -7.86 0.0042
2014-02-11 2013-12-31 13F NEWPARK RES COM PAR $.01NEW 651718504 197,759 6,700 3.51 2,430 0.45 0.0048
2013-11-07 2013-09-30 13F NEWPARK RES COM PAR $.01NEW 651718504 191,059 171,700 886.93 2,419 1,035.68 0.0051
2013-08-07 2013-06-30 13F NEWPARK RES COM PAR $.01NEW 651718504 19,359 19,359 213 0.0005
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.