Matthew Lanigan

Insider

First SEC filing: June 5, 2026 · Latest: June 5, 2026

On this page

Insider at Companies where this person is a reporting insider.
Insider transactions Every share this person bought or sold, from Form 4 filings.
Derivatives Options and other derivative holdings reported by this person.
Compensation Executive pay disclosed in company proxy statements.

Insider at

NPKI selling June 3, 2026

Insider transactions

0 buys (P) 3 sells (S) Net: $-3,138,672 + 96 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

96 other filings hidden

Date	Ticker	Code	Shares	Price	Value	Owned after	Δ own	A/D	vs now
June 3, 2026	NPKI	S	167,375	$14.43	$2,415,907	254,699	—	—	-3.9% (price as of 2026-08-20)
June 1, 2026	NPKI	M	100,188	—	—	422,074	—	—	(price as of 2026-08-20)
June 1, 2026	NPKI	F	22,232	$14.31	$318,140	422,074	—	—	-3.1% (price as of 2026-08-20)
Sept. 3, 2025	NPKI	M	1,000	$10.38	$10,380	0 Direct	-100.00%	Disposed	33.6% (price as of 2026-08-20)
Sept. 3, 2025	NPKI	S 10b5-1	1,000	$10.38	$10,380	1,095,913 Direct	-0.09%	Disposed	33.6% (price as of 2026-08-20)
Sept. 3, 2025	NPKI	M	1,000	$4.32	$4,320	1,096,913 Direct	+0.09%	Acquired	221.1% (price as of 2026-08-20)
Aug. 22, 2025	NPKI	M	68,896	$10.34	$712,385	1,000 Direct	-98.57%	Disposed	34.1% (price as of 2026-08-20)
Aug. 22, 2025	NPKI	S 10b5-1	68,896	$10.34	$712,385	1,095,913 Direct	-5.91%	Disposed	34.1% (price as of 2026-08-20)
Aug. 22, 2025	NPKI	M	68,896	$4.32	$297,631	1,164,809 Direct	+6.29%	Acquired	221.1% (price as of 2026-08-20)
June 1, 2025	NPKI	M	100,188	—	—	100,188 Direct	-50.00%	Disposed	(price as of 2026-08-20)
June 1, 2025	NPKI	M	108,651	—	—	200,376 Direct	-35.16%	Disposed	(price as of 2026-08-20)
June 1, 2025	NPKI	F	42,754	$8.09	$345,880	1,095,913 Direct	-3.75%	Disposed	71.4% (price as of 2026-08-20)
June 1, 2025	NPKI	F	39,423	$8.09	$318,932	1,138,667 Direct	-3.35%	Disposed	71.4% (price as of 2026-08-20)
June 1, 2025	NPKI	F	22,232	$8.09	$179,857	1,178,090 Direct	-1.85%	Disposed	71.4% (price as of 2026-08-20)
June 1, 2025	NPKI	M	100,188	—	—	1,200,322 Direct	+9.11%	Acquired	(price as of 2026-08-20)
June 1, 2025	NPKI	M	108,651	—	—	1,100,134 Direct	+10.96%	Acquired	(price as of 2026-08-20)
May 14, 2025	NPKI	A	212,667	—	—	991,483 Direct	+27.31%	Acquired	(price as of 2026-08-20)
Sept. 1, 2024	NPKI	M	33,333	—	—	309,027 Direct	-9.74%	Disposed	(price as of 2026-08-20)
Sept. 1, 2024	NPKI	F	13,116	$8.23	$107,945	778,816 Direct	-1.66%	Disposed	68.5% (price as of 2026-08-20)
Sept. 1, 2024	NPKI	M	33,333	—	—	791,932 Direct	+4.39%	Acquired	(price as of 2026-08-20)
June 1, 2024	NPKI	M	100,189	—	—	342,360 Direct	-22.64%	Disposed	(price as of 2026-08-20)
June 1, 2024	NPKI	M	108,651	—	—	442,549 Direct	-19.71%	Disposed	(price as of 2026-08-20)
June 1, 2024	NPKI	M	37,090	—	—	551,200 Direct	-6.30%	Disposed	(price as of 2026-08-20)
June 1, 2024	NPKI	F	14,594	$8.48	$123,757	758,599 Direct	-1.89%	Disposed	63.6% (price as of 2026-08-20)
June 1, 2024	NPKI	F	42,754	$8.48	$362,554	773,193 Direct	-5.24%	Disposed	63.6% (price as of 2026-08-20)
June 1, 2024	NPKI	F	39,424	$8.48	$334,316	815,947 Direct	-4.61%	Disposed	63.6% (price as of 2026-08-20)
June 1, 2024	NPKI	M	100,189	—	—	855,371 Direct	+13.27%	Acquired	(price as of 2026-08-20)
June 1, 2024	NPKI	M	108,651	—	—	755,182 Direct	+16.81%	Acquired	(price as of 2026-08-20)
June 1, 2024	NPKI	M	37,090	—	—	646,531 Direct	+6.09%	Acquired	(price as of 2026-08-20)
May 15, 2024	NPKI	A	169,496	—	—	609,441 Direct	+38.53%	Acquired	(price as of 2026-08-20)
Sept. 1, 2023	NPKI	M	33,333	—	—	588,290 Direct	-5.36%	Disposed	(price as of 2026-08-20)
Sept. 1, 2023	NPKI	F	13,116	$6.13	$80,401	439,945 Direct	-2.89%	Disposed	126.3% (price as of 2026-08-20)
Sept. 1, 2023	NPKI	M	33,333	—	—	453,061 Direct	+7.94%	Acquired	(price as of 2026-08-20)
June 1, 2023	NPKI	M	37,090	—	—	621,623 Direct	-5.63%	Disposed	(price as of 2026-08-20)
June 1, 2023	NPKI	M	34,373	—	—	658,713 Direct	-4.96%	Disposed	(price as of 2026-08-20)
June 1, 2023	NPKI	M	108,652	—	—	693,086 Direct	-13.55%	Disposed	(price as of 2026-08-20)
June 1, 2023	NPKI	F	14,594	$3.67	$53,560	419,728 Direct	-3.36%	Disposed	277.9% (price as of 2026-08-20)
June 1, 2023	NPKI	M	37,090	—	—	434,322 Direct	+9.34%	Acquired	(price as of 2026-08-20)
June 1, 2023	NPKI	F	13,525	$3.67	$49,637	397,232 Direct	-3.29%	Disposed	277.9% (price as of 2026-08-20)
June 1, 2023	NPKI	M	34,373	—	—	410,757 Direct	+9.13%	Acquired	(price as of 2026-08-20)
June 1, 2023	NPKI	F	42,754	$3.67	$156,907	376,384 Direct	-10.20%	Disposed	277.9% (price as of 2026-08-20)
June 1, 2023	NPKI	M	108,652	—	—	419,138 Direct	+34.99%	Acquired	(price as of 2026-08-20)
May 18, 2023	NPKI	A	300,565	—	—	801,738 Direct	+59.97%	Acquired	(price as of 2026-08-20)
Sept. 1, 2022	NPKI	M	33,334	—	—	501,173 Direct	-6.24%	Disposed	(price as of 2026-08-20)
Sept. 1, 2022	NPKI	M	33,334	—	—	310,486 Direct	+12.03%	Acquired	(price as of 2026-08-20)
Aug. 5, 2022	NPKI	P	19,000	$2.55	$48,450	277,152 Direct	+7.36%	Acquired	443.9% (price as of 2026-08-20)
June 1, 2022	NPKI	M	37,090	—	—	534,507 Direct	-6.49%	Disposed	(price as of 2026-08-20)
June 1, 2022	NPKI	M	34,374	—	—	571,597 Direct	-5.67%	Disposed	(price as of 2026-08-20)
June 1, 2022	NPKI	M	16,737	—	—	605,971 Direct	-2.69%	Disposed	(price as of 2026-08-20)
June 1, 2022	NPKI	M	25,000	—	—	622,708 Direct	-3.86%	Disposed	(price as of 2026-08-20)
June 1, 2022	NPKI	F	14,594	$4.48	$65,381	258,152 Direct	-5.35%	Disposed	209.6% (price as of 2026-08-20)
June 1, 2022	NPKI	M	37,090	—	—	272,746 Direct	+15.74%	Acquired	(price as of 2026-08-20)
June 1, 2022	NPKI	F	13,526	$4.48	$60,596	235,656 Direct	-5.43%	Disposed	209.6% (price as of 2026-08-20)
June 1, 2022	NPKI	M	34,374	—	—	249,182 Direct	+16.00%	Acquired	(price as of 2026-08-20)
June 1, 2022	NPKI	F	6,586	$4.48	$29,505	214,808 Direct	-2.97%	Disposed	209.6% (price as of 2026-08-20)
June 1, 2022	NPKI	M	16,737	—	—	221,394 Direct	+8.18%	Acquired	(price as of 2026-08-20)
June 1, 2022	NPKI	F	9,837	$4.48	$44,070	204,657 Direct	-4.59%	Disposed	209.6% (price as of 2026-08-20)
June 1, 2022	NPKI	M	25,000	—	—	214,494 Direct	+13.19%	Acquired	(price as of 2026-08-20)
May 19, 2022	NPKI	A	325,954	—	—	647,708 Direct	+101.31%	Acquired	(price as of 2026-08-20)
May 19, 2022	NPKI	A	327,740	—	—	649,494 Direct	+101.86%	Acquired	(price as of 2026-08-20)
Sept. 1, 2021	NPKI	A	100,000	—	—	321,754 Direct	+45.10%	Acquired	(price as of 2026-08-20)
June 1, 2021	NPKI	M	9,382	—	—	110,484 Direct	-7.83%	Disposed	(price as of 2026-08-20)
June 1, 2021	NPKI	M	16,737	—	—	119,866 Direct	-12.25%	Disposed	(price as of 2026-08-20)
June 1, 2021	NPKI	M	34,374	—	—	136,603 Direct	-20.10%	Disposed	(price as of 2026-08-20)
June 1, 2021	NPKI	F	3,691	$3.51	$12,955	189,494 Direct	-1.91%	Disposed	295.2% (price as of 2026-08-20)
June 1, 2021	NPKI	M	9,382	—	—	193,185 Direct	+5.10%	Acquired	(price as of 2026-08-20)
June 1, 2021	NPKI	F	6,586	$3.51	$23,117	183,803 Direct	-3.46%	Disposed	295.2% (price as of 2026-08-20)
June 1, 2021	NPKI	M	16,737	—	—	190,389 Direct	+9.64%	Acquired	(price as of 2026-08-20)
June 1, 2021	NPKI	F	13,526	$3.51	$47,476	173,652 Direct	-7.23%	Disposed	295.2% (price as of 2026-08-20)
June 1, 2021	NPKI	M	34,374	—	—	187,178 Direct	+22.50%	Acquired	(price as of 2026-08-20)
May 20, 2021	NPKI	A	111,270	—	—	282,247 Direct	+65.08%	Acquired	(price as of 2026-08-20)
May 18, 2021	NPKI	M	6,410	—	—	170,977 Direct	-3.61%	Disposed	(price as of 2026-08-20)
May 18, 2021	NPKI	M	6,410	—	—	152,804 Direct	+4.38%	Acquired	(price as of 2026-08-20)
June 1, 2020	NPKI	M	25,000	—	—	177,387 Direct	-12.35%	Disposed	(price as of 2026-08-20)
June 1, 2020	NPKI	M	16,737	—	—	202,387 Direct	-7.64%	Disposed	(price as of 2026-08-20)
June 1, 2020	NPKI	M	9,383	—	—	219,124 Direct	-4.11%	Disposed	(price as of 2026-08-20)
June 1, 2020	NPKI	M	11,217	—	—	228,507 Direct	-4.68%	Disposed	(price as of 2026-08-20)
June 1, 2020	NPKI	M	25,000	—	—	146,394 Direct	+20.59%	Acquired	(price as of 2026-08-20)
June 1, 2020	NPKI	M	16,737	—	—	121,394 Direct	+15.99%	Acquired	(price as of 2026-08-20)
June 1, 2020	NPKI	M	9,383	—	—	104,657 Direct	+9.85%	Acquired	(price as of 2026-08-20)
June 1, 2020	NPKI	M	11,217	—	—	95,274 Direct	+13.34%	Acquired	(price as of 2026-08-20)
May 21, 2020	NPKI	A	103,121	—	—	239,724 Direct	+75.49%	Acquired	(price as of 2026-08-20)
July 2, 2019	NPKI	M	29,862	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
July 2, 2019	NPKI	F	11,750	$7.12	$83,660	84,057 Direct	-12.26%	Disposed	94.8% (price as of 2026-08-20)
July 2, 2019	NPKI	M	29,862	—	—	95,807 Direct	+45.28%	Acquired	(price as of 2026-08-20)
June 1, 2019	NPKI	M	7,945	—	—	136,603 Direct	-5.50%	Disposed	(price as of 2026-08-20)
June 1, 2019	NPKI	M	9,383	—	—	144,548 Direct	-6.10%	Disposed	(price as of 2026-08-20)
June 1, 2019	NPKI	M	11,218	—	—	153,931 Direct	-6.79%	Disposed	(price as of 2026-08-20)
June 1, 2019	NPKI	F	1,934	$6.99	$13,519	65,945 Direct	-2.85%	Disposed	98.4% (price as of 2026-08-20)
June 1, 2019	NPKI	M	7,945	—	—	67,879 Direct	+13.26%	Acquired	(price as of 2026-08-20)
June 1, 2019	NPKI	F	2,284	$6.99	$15,965	59,934 Direct	-3.67%	Disposed	98.4% (price as of 2026-08-20)
June 1, 2019	NPKI	M	9,383	—	—	62,218 Direct	+17.76%	Acquired	(price as of 2026-08-20)
June 1, 2019	NPKI	F	2,731	$6.99	$19,090	52,835 Direct	-4.91%	Disposed	98.4% (price as of 2026-08-20)
June 1, 2019	NPKI	M	11,218	—	—	55,566 Direct	+25.30%	Acquired	(price as of 2026-08-20)
May 23, 2019	NPKI	A	50,211	—	—	165,149 Direct	+43.69%	Acquired	(price as of 2026-08-20)
May 18, 2019	NPKI	M	6,410	—	—	114,938 Direct	-5.28%	Disposed	(price as of 2026-08-20)
May 18, 2019	NPKI	F	1,560	$7.61	$11,872	44,348 Direct	-3.40%	Disposed	82.3% (price as of 2026-08-20)
May 18, 2019	NPKI	M	6,410	—	—	45,908 Direct	+16.23%	Acquired	(price as of 2026-08-20)
June 1, 2018	NPKI	M	7,945	—	—	121,348 Direct	-6.14%	Disposed	(price as of 2026-08-20)
June 1, 2018	NPKI	M	11,218	—	—	129,293 Direct	-7.98%	Disposed	(price as of 2026-08-20)

Showing latest 100 of 119 transactions

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.

Date	Ticker	Security	Underlying	Exercise price	Expiration	Shares	A/D
Sept. 3, 2025	NPKI	Non-Qualified Stock Option (right to buy)	Common Stock (1,000)	$4.32	May 19, 2026	1,000	Disposed
Aug. 22, 2025	NPKI	Non-Qualified Stock Option (right to buy)	Common Stock (68,896)	$4.32	May 19, 2026	68,896	Disposed
June 1, 2025	NPKI	Restricted Stock Units	Common Stock (100,188)	—	—	100,188	Disposed
June 1, 2025	NPKI	Restricted Stock Units	Common Stock (108,651)	—	—	108,651	Disposed
Sept. 1, 2024	NPKI	Restricted Stock Units	Common Stock (33,333)	—	—	33,333	Disposed
June 1, 2024	NPKI	Restricted Stock Units	Common Stock (100,189)	—	—	100,189	Disposed
June 1, 2024	NPKI	Restricted Stock Units	Common Stock (108,651)	—	—	108,651	Disposed
June 1, 2024	NPKI	Restricted Stock Units	Common Stock (37,090)	—	—	37,090	Disposed
Sept. 1, 2023	NPKI	Restricted Stock Units	Common Stock (33,333)	—	—	33,333	Disposed
June 1, 2023	NPKI	Restricted Stock Units	Common Stock (37,090)	—	—	37,090	Disposed
June 1, 2023	NPKI	Restricted Stock Units	Common Stock (34,373)	—	—	34,373	Disposed
June 1, 2023	NPKI	Restricted Stock Units	Common Stock (108,652)	—	—	108,652	Disposed
May 18, 2023	NPKI	Restricted Stock Units	Common Stock (300,565)	$0.00	—	300,565	Acquired
Sept. 1, 2022	NPKI	Restricted Stock Units	Common Stock (33,334)	$0.00	—	33,334	Disposed
June 1, 2022	NPKI	Restricted Stock Units	Common Stock (37,090)	—	—	37,090	Disposed
June 1, 2022	NPKI	Restricted Stock Units	Common Stock (34,374)	—	—	34,374	Disposed
June 1, 2022	NPKI	Restricted Stock Units	Common Stock (16,737)	—	—	16,737	Disposed
June 1, 2022	NPKI	Restricted Stock Units	Common Stock (25,000)	—	—	25,000	Disposed
May 19, 2022	NPKI	Restricted Stock Units	Common Stock (325,954)	$0.00	—	325,954	Acquired
May 19, 2022	NPKI	Restricted Stock Units	Common Stock (327,740)	$0.00	—	327,740	Acquired
Sept. 1, 2021	NPKI	Restricted Stock Units	Common Stock (100,000)	$0.00	—	100,000	Acquired
June 1, 2021	NPKI	Restricted Stock Units	Common Stock (9,382)	—	—	9,382	Disposed
June 1, 2021	NPKI	Restricted Stock Units	Common Stock (16,737)	—	—	16,737	Disposed
June 1, 2021	NPKI	Restricted Stock Units	Common Stock (34,374)	—	—	34,374	Disposed
May 20, 2021	NPKI	Restricted Stock Units	Common Stock (111,270)	$0.00	—	111,270	Acquired
May 18, 2021	NPKI	Restricted Stock Units	Common Stock (6,410)	—	—	6,410	Disposed
June 1, 2020	NPKI	Restricted Stock Units	Common Stock (25,000)	—	—	25,000	Disposed
June 1, 2020	NPKI	Restricted Stock Units	Common Stock (16,737)	—	—	16,737	Disposed
June 1, 2020	NPKI	Restricted Stock Units	Common Stock (9,383)	—	—	9,383	Disposed
June 1, 2020	NPKI	Restricted Stock Units	Common Stock (11,217)	—	—	11,217	Disposed
May 21, 2020	NPKI	Restricted Stock Units	Common Stock (103,121)	$0.00	—	103,121	Acquired
July 2, 2019	NPKI	Performance Shares	Common Stock (29,862)	$0.00	—	29,862	Disposed
June 1, 2019	NPKI	Restricted Stock Units	Common Stock (7,945)	—	—	7,945	Disposed
June 1, 2019	NPKI	Restricted Stock Units	Common Stock (9,383)	—	—	9,383	Disposed
June 1, 2019	NPKI	Restricted Stock Units	Common Stock (11,218)	—	—	11,218	Disposed
May 23, 2019	NPKI	Restricted Stock Units	Common Stock (50,211)	$0.00	—	50,211	Acquired
May 18, 2019	NPKI	Restricted Stock Units	Common Stock (6,410)	—	—	6,410	Disposed
June 1, 2018	NPKI	Restricted Stock Units	Common Stock (7,945)	—	—	7,945	Disposed
June 1, 2018	NPKI	Restricted Stock Units	Common Stock (11,218)	—	—	11,218	Disposed
May 16, 2018	NPKI	Restricted Stock Units	Common Stock (50,000)	$0.00	—	50,000	Acquired
May 16, 2018	NPKI	Restricted Stock Units	Common Stock (28,148)	$0.00	—	28,148	Acquired
Aug. 1, 2017	NPKI	Non-Qualified Stock Option (right to buy)	Common Stock (34,948)	$4.32	May 19, 2026	34,948	Disposed
June 1, 2017	NPKI	Restricted Stock Units	Common Stock (7,946)	—	—	7,946	Disposed
May 19, 2016	NPKI	Restricted Stock Units	Common Stock (23,836)	$0.00	—	23,836	Acquired
May 19, 2016	NPKI	Performance Shares	Common Stock (29,862)	$0.00	—	29,862	Acquired
May 19, 2016	NPKI	Non-Qualified Stock Option (right to buy)	Common Stock (104,844)	$4.32	May 19, 2026	104,844	Acquired

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

Compensation (DEF 14A)

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

NPKI

COO

Fiscal year	Salary	Bonus	Stock awards	Option awards	Non-equity incentive	Pension change	Other	Total
2021	$400,578	$199,730	—	—	$549,073	—	$19,356	$1,750,703

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