Insider at

04

Insider transactions

05
0 buys (P) 0 sells (S) Net: $0 + 38 non-open-market transactions below last 12 months, based on the transactions shown below

Price change vs current quote, split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted

No open-market trades on record; showing all filings.

DateTickerCodeSharesPriceValue Owned afterΔ ownA/Dvs now
June 1, 2024 NPKI M 28,235 · · 74,915 Direct -27.37% Disposed (price as of 2026-10-05)
June 1, 2024 NPKI M 30,620 · · 103,150 Direct -22.89% Disposed (price as of 2026-10-05)
June 1, 2024 NPKI M 35,788 · · 133,770 Direct -21.11% Disposed (price as of 2026-10-05)
June 1, 2024 NPKI F 8,008 $8.48 $67,908 386,245 Direct -2.03% Disposed 39.8% (price as of 2026-10-05)
June 1, 2024 NPKI F 8,714 $8.48 $73,895 394,253 Direct -2.16% Disposed 39.8% (price as of 2026-10-05)
June 1, 2024 NPKI F 7,455 $8.48 $63,218 402,967 Direct -1.82% Disposed 39.8% (price as of 2026-10-05)
June 1, 2024 NPKI M 28,235 · · 410,422 Direct +7.39% Acquired (price as of 2026-10-05)
June 1, 2024 NPKI M 30,620 · · 382,187 Direct +8.71% Acquired (price as of 2026-10-05)
June 1, 2024 NPKI M 35,788 · · 351,567 Direct +11.33% Acquired (price as of 2026-10-05)
May 15, 2024 NPKI A 47,767 · · 315,779 Direct +17.82% Acquired (price as of 2026-10-05)
July 15, 2023 NPKI F 17,425 $5.26 $91,656 268,012 Direct -6.10% Disposed 125.4% (price as of 2026-10-05)
June 2, 2023 NPKI M 33,166 · · 169,558 Direct -16.36% Disposed (price as of 2026-10-05)
June 2, 2023 NPKI M 33,166 · · 285,437 Direct +13.15% Acquired (price as of 2026-10-05)
June 1, 2023 NPKI M 35,788 · · 202,724 Direct -15.00% Disposed (price as of 2026-10-05)
June 1, 2023 NPKI M 30,620 · · 238,512 Direct -11.38% Disposed (price as of 2026-10-05)
June 1, 2023 NPKI F 8,714 $3.67 $31,980 252,271 Direct -3.34% Disposed 223.0% (price as of 2026-10-05)
June 1, 2023 NPKI M 35,788 · · 260,985 Direct +15.89% Acquired (price as of 2026-10-05)
June 1, 2023 NPKI F 8,075 $3.67 $29,635 225,197 Direct -3.46% Disposed 223.0% (price as of 2026-10-05)
June 1, 2023 NPKI F 7,455 $3.67 $27,360 233,272 Direct -3.10% Disposed 223.0% (price as of 2026-10-05)
June 1, 2023 NPKI M 30,620 · · 240,727 Direct +14.57% Acquired (price as of 2026-10-05)
May 18, 2023 NPKI A 84,705 · · 269,132 Direct +45.93% Acquired (price as of 2026-10-05)
June 1, 2022 NPKI M 35,789 · · 184,427 Direct -16.25% Disposed (price as of 2026-10-05)
June 1, 2022 NPKI M 33,167 · · 220,216 Direct -13.09% Disposed (price as of 2026-10-05)
June 1, 2022 NPKI F 8,714 $4.48 $39,039 210,107 Direct -3.98% Disposed 164.6% (price as of 2026-10-05)
June 1, 2022 NPKI M 35,789 · · 218,821 Direct +19.55% Acquired (price as of 2026-10-05)
June 1, 2022 NPKI F 8,076 $4.48 $36,180 183,032 Direct -4.23% Disposed 164.6% (price as of 2026-10-05)
June 1, 2022 NPKI M 33,167 · · 191,108 Direct +21.00% Acquired (price as of 2026-10-05)
May 19, 2022 NPKI A 91,860 · · 253,383 Direct +56.87% Acquired (price as of 2026-10-05)
May 19, 2022 NPKI A 92,363 · · 253,886 Direct +57.18% Acquired (price as of 2026-10-05)
July 15, 2021 NPKI M 12,175 · · 161,523 Direct -7.01% Disposed (price as of 2026-10-05)
July 15, 2021 NPKI F 12,175 $2.93 $35,673 157,941 Direct -7.16% Disposed 304.6% (price as of 2026-10-05)
July 15, 2021 NPKI M 50,000 · · 170,116 Direct +41.63% Acquired (price as of 2026-10-05)
June 1, 2021 NPKI M 33,167 · · 66,333 Direct -33.33% Disposed (price as of 2026-10-05)
June 1, 2021 NPKI F 13,051 $3.51 $45,809 120,116 Direct -9.80% Disposed 237.7% (price as of 2026-10-05)
June 1, 2021 NPKI M 33,167 · · 133,167 Direct +33.17% Acquired (price as of 2026-10-05)
May 20, 2021 NPKI A 107,365 · · 206,865 Direct +107.90% Acquired (price as of 2026-10-05)
May 21, 2020 NPKI A 99,500 · · 99,500 Direct · Acquired (price as of 2026-10-05)
July 15, 2019 NPKI A 100,000 · · 100,000 Direct · Acquired (price as of 2026-10-05)

P = Open-market purchase · S = Sale · A = Grant/award · M = Option exercise · G = Gift · F = Tax withholding

Insider transactions are not a recommendation; sales are often driven by liquidity or tax reasons.

Derivative holdings (Form 4 Table II) Options, RSUs and convertible securities reported on Form 4 Table II.

06
DateTickerSecurityUnderlying Exercise priceExpirationSharesA/D
June 1, 2024 NPKI Restricted Stock Units Common Stock (28,235) · · 28,235 Disposed
June 1, 2024 NPKI Restricted Stock Units Common Stock (30,620) · · 30,620 Disposed
June 1, 2024 NPKI Restricted Stock Units Common Stock (35,788) · · 35,788 Disposed
June 2, 2023 NPKI Restricted Stock Units Common Stock (33,166) · · 33,166 Disposed
June 1, 2023 NPKI Restricted Stock Units Common Stock (35,788) · · 35,788 Disposed
June 1, 2023 NPKI Restricted Stock Units Common Stock (30,620) · · 30,620 Disposed
May 18, 2023 NPKI Restricted Stock Units Common Stock (84,705) $0.00 · 84,705 Acquired
June 1, 2022 NPKI Restricted Stock Units Common Stock (35,789) · · 35,789 Disposed
June 1, 2022 NPKI Restricted Stock Units Common Stock (33,167) · · 33,167 Disposed
May 19, 2022 NPKI Restricted Stock Units Common Stock (91,860) $0.00 · 91,860 Acquired
May 19, 2022 NPKI Restricted Stock Units Common Stock (92,363) $0.00 · 92,363 Acquired
July 15, 2021 NPKI Restricted Stock Units Common Stock (12,175) · · 12,175 Disposed
June 1, 2021 NPKI Restricted Stock Units Common Stock (33,167) · · 33,167 Disposed
May 20, 2021 NPKI Restricted Stock Units Common Stock (107,365) $0.00 · 107,365 Acquired
May 21, 2020 NPKI Restricted Stock Units Common Stock (99,500) $0.00 · 99,500 Acquired

Exercise/conversion price is blank when not applicable (e.g. RSUs).

Compensation (DEF 14A)

08

Matched by name from proxy statements (DEF 14A) — verify against the filing.

NPKI

President and President, Fluids Systems
Fiscal yearSalaryBonusStock awards Option awardsNon-equity incentivePension changeOtherTotal
2021 $402,378 · · · $108,914 · $15,222 $878,671
2020 $386,067 · · · $109,716 · $35,730 $736,483
2019 $205,175 $6,995 · · $104,446 · $61,890 $1,057,506

Figures from the Summary Compensation Table of the company's proxy statement (DEF 14A). Compensation is not a recommendation.