Douglas L White

Insider

First SEC filing: June 17, 2025 · Latest: June 17, 2025

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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.
Initial holdings The stakes this person held when they first started reporting.

Insider at

NPKI selling Nov. 27, 2019

Insider transactions

0 buys (P) 0 sells (S) Net: $0 + 99 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

99 other filings hidden

Date	Ticker	Code	Shares	Price	Value	Owned after	Δ own	A/D	vs now
June 14, 2025	NPKI	A	730	$6.51	$4,752	305,245 Direct	+0.24%	Acquired	113.1% (price as of 2026-08-20)
June 1, 2025	NPKI	M	14,667	—	—	14,666 Direct	-50.00%	Disposed	(price as of 2026-08-20)
June 1, 2025	NPKI	M	17,333	—	—	29,333 Direct	-37.14%	Disposed	(price as of 2026-08-20)
June 1, 2025	NPKI	F	5,771	$8.09	$46,687	304,515 Direct	-1.86%	Disposed	71.4% (price as of 2026-08-20)
June 1, 2025	NPKI	F	6,820	$8.09	$55,174	310,286 Direct	-2.15%	Disposed	71.4% (price as of 2026-08-20)
June 1, 2025	NPKI	F	3,122	$8.09	$25,257	317,106 Direct	-0.97%	Disposed	71.4% (price as of 2026-08-20)
June 1, 2025	NPKI	M	14,667	—	—	320,228 Direct	+4.80%	Acquired	(price as of 2026-08-20)
June 1, 2025	NPKI	M	17,333	—	—	305,561 Direct	+6.01%	Acquired	(price as of 2026-08-20)
May 14, 2025	NPKI	A	29,900	—	—	288,228 Direct	+11.57%	Acquired	(price as of 2026-08-20)
Dec. 13, 2024	NPKI	A	722	$6.58	$4,751	258,328 Direct	+0.28%	Acquired	110.8% (price as of 2026-08-20)
June 14, 2024	NPKI	A	841	$5.98	$5,029	257,606 Direct	+0.33%	Acquired	131.9% (price as of 2026-08-20)
June 1, 2024	NPKI	M	14,667	—	—	46,666 Direct	-23.91%	Disposed	(price as of 2026-08-20)
June 1, 2024	NPKI	M	17,333	—	—	61,333 Direct	-22.03%	Disposed	(price as of 2026-08-20)
June 1, 2024	NPKI	M	18,666	—	—	78,666 Direct	-19.18%	Disposed	(price as of 2026-08-20)
June 1, 2024	NPKI	F	4,545	$8.48	$38,542	256,765 Direct	-1.74%	Disposed	63.6% (price as of 2026-08-20)
June 1, 2024	NPKI	F	4,220	$8.48	$35,786	261,310 Direct	-1.59%	Disposed	63.6% (price as of 2026-08-20)
June 1, 2024	NPKI	F	3,571	$8.48	$30,282	265,530 Direct	-1.33%	Disposed	63.6% (price as of 2026-08-20)
June 1, 2024	NPKI	M	14,667	—	—	269,101 Direct	+5.76%	Acquired	(price as of 2026-08-20)
June 1, 2024	NPKI	M	17,333	—	—	254,434 Direct	+7.31%	Acquired	(price as of 2026-08-20)
June 1, 2024	NPKI	M	18,666	—	—	237,101 Direct	+8.55%	Acquired	(price as of 2026-08-20)
May 15, 2024	NPKI	A	23,800	—	—	218,435 Direct	+12.23%	Acquired	(price as of 2026-08-20)
Dec. 14, 2023	NPKI	A	1,203	$3.82	$4,595	194,635 Direct	+0.62%	Acquired	263.1% (price as of 2026-08-20)
Nov. 20, 2023	NPKI	M	12,500	—	—	97,332 Direct	-11.38%	Disposed	(price as of 2026-08-20)
Nov. 20, 2023	NPKI	F	3,043	$7.19	$21,879	193,432 Direct	-1.55%	Disposed	92.9% (price as of 2026-08-20)
Nov. 20, 2023	NPKI	M	12,500	—	—	196,475 Direct	+6.79%	Acquired	(price as of 2026-08-20)
June 14, 2023	NPKI	A	1,320	$3.37	$4,448	183,975 Direct	+0.72%	Acquired	311.6% (price as of 2026-08-20)
June 2, 2023	NPKI	M	17,333	—	—	109,832 Direct	-13.63%	Disposed	(price as of 2026-08-20)
June 2, 2023	NPKI	M	17,333	—	—	182,655 Direct	+10.48%	Acquired	(price as of 2026-08-20)
June 1, 2023	NPKI	M	17,334	—	—	127,165 Direct	-12.00%	Disposed	(price as of 2026-08-20)
June 1, 2023	NPKI	M	18,667	—	—	144,499 Direct	-11.44%	Disposed	(price as of 2026-08-20)
June 1, 2023	NPKI	F	4,220	$3.67	$15,487	165,322 Direct	-2.49%	Disposed	277.9% (price as of 2026-08-20)
June 1, 2023	NPKI	F	4,220	$3.67	$15,487	169,542 Direct	-2.43%	Disposed	277.9% (price as of 2026-08-20)
June 1, 2023	NPKI	M	17,334	—	—	173,762 Direct	+11.08%	Acquired	(price as of 2026-08-20)
June 1, 2023	NPKI	F	4,545	$3.67	$16,680	156,428 Direct	-2.82%	Disposed	277.9% (price as of 2026-08-20)
June 1, 2023	NPKI	M	18,667	—	—	160,973 Direct	+13.12%	Acquired	(price as of 2026-08-20)
May 18, 2023	NPKI	A	44,000	—	—	163,166 Direct	+36.92%	Acquired	(price as of 2026-08-20)
Dec. 14, 2022	NPKI	A	1,367	$3.21	$4,388	142,306 Direct	+0.97%	Acquired	332.1% (price as of 2026-08-20)
June 14, 2022	NPKI	A	1,785	$2.40	$4,284	140,939 Direct	+1.28%	Acquired	477.9% (price as of 2026-08-20)
June 1, 2022	NPKI	M	18,667	—	—	119,166 Direct	-13.54%	Disposed	(price as of 2026-08-20)
June 1, 2022	NPKI	M	5,588	—	—	137,833 Direct	-3.90%	Disposed	(price as of 2026-08-20)
June 1, 2022	NPKI	M	17,333	—	—	143,421 Direct	-10.78%	Disposed	(price as of 2026-08-20)
June 1, 2022	NPKI	F	4,545	$4.48	$20,362	139,154 Direct	-3.16%	Disposed	209.6% (price as of 2026-08-20)
June 1, 2022	NPKI	M	18,667	—	—	143,699 Direct	+14.93%	Acquired	(price as of 2026-08-20)
June 1, 2022	NPKI	F	1,360	$4.48	$6,093	125,032 Direct	-1.08%	Disposed	209.6% (price as of 2026-08-20)
June 1, 2022	NPKI	M	5,588	—	—	126,392 Direct	+4.63%	Acquired	(price as of 2026-08-20)
June 1, 2022	NPKI	F	4,220	$4.48	$18,906	120,804 Direct	-3.38%	Disposed	209.6% (price as of 2026-08-20)
June 1, 2022	NPKI	M	17,333	—	—	125,024 Direct	+16.10%	Acquired	(price as of 2026-08-20)
May 19, 2022	NPKI	A	52,000	—	—	160,754 Direct	+47.81%	Acquired	(price as of 2026-08-20)
Dec. 14, 2021	NPKI	A	1,248	$1.97	$2,459	107,691 Direct	+1.17%	Acquired	604.1% (price as of 2026-08-20)
Nov. 20, 2021	NPKI	M	12,500	—	—	108,754 Direct	-10.31%	Disposed	(price as of 2026-08-20)
Nov. 20, 2021	NPKI	F	3,043	$2.72	$8,277	106,443 Direct	-2.78%	Disposed	409.9% (price as of 2026-08-20)
Nov. 20, 2021	NPKI	M	12,500	—	—	109,486 Direct	+12.89%	Acquired	(price as of 2026-08-20)
Aug. 14, 2021	NPKI	A	2,000	$1.97	$3,940	96,986 Direct	+2.11%	Acquired	604.1% (price as of 2026-08-20)
June 1, 2021	NPKI	M	4,716	—	—	65,254 Direct	-6.74%	Disposed	(price as of 2026-08-20)
June 1, 2021	NPKI	M	5,589	—	—	69,970 Direct	-7.40%	Disposed	(price as of 2026-08-20)
June 1, 2021	NPKI	M	17,334	—	—	75,559 Direct	-18.66%	Disposed	(price as of 2026-08-20)
June 1, 2021	NPKI	M	4,716	—	—	94,986 Direct	+5.22%	Acquired	(price as of 2026-08-20)
June 1, 2021	NPKI	M	5,589	—	—	90,270 Direct	+6.60%	Acquired	(price as of 2026-08-20)
June 1, 2021	NPKI	M	17,334	—	—	84,681 Direct	+25.74%	Acquired	(price as of 2026-08-20)
May 20, 2021	NPKI	A	56,000	—	—	148,893 Direct	+60.28%	Acquired	(price as of 2026-08-20)
Feb. 14, 2021	NPKI	A	2,000	$1.78	$3,560	67,347 Direct	+3.06%	Acquired	679.2% (price as of 2026-08-20)
Aug. 14, 2020	NPKI	A	2,000	$1.78	$3,560	65,347 Direct	+3.16%	Acquired	679.2% (price as of 2026-08-20)
June 1, 2020	NPKI	M	5,589	—	—	92,893 Direct	-5.68%	Disposed	(price as of 2026-08-20)
June 1, 2020	NPKI	M	4,717	—	—	98,482 Direct	-4.57%	Disposed	(price as of 2026-08-20)
June 1, 2020	NPKI	M	3,461	—	—	103,199 Direct	-3.24%	Disposed	(price as of 2026-08-20)
June 1, 2020	NPKI	M	5,589	—	—	63,347 Direct	+9.68%	Acquired	(price as of 2026-08-20)
June 1, 2020	NPKI	M	4,717	—	—	57,758 Direct	+8.89%	Acquired	(price as of 2026-08-20)
June 1, 2020	NPKI	M	3,461	—	—	53,041 Direct	+6.98%	Acquired	(price as of 2026-08-20)
May 21, 2020	NPKI	A	52,000	—	—	106,660 Direct	+95.13%	Acquired	(price as of 2026-08-20)
Feb. 14, 2020	NPKI	A	2,000	$3.60	$7,200	49,580 Direct	+4.20%	Acquired	285.3% (price as of 2026-08-20)
Nov. 27, 2019	NPKI	S	6,145	$6.07	$37,300	47,580 Direct	-11.44%	Disposed	128.5% (price as of 2026-08-20)
Nov. 20, 2019	NPKI	A	25,000	—	—	54,660 Direct	+84.29%	Acquired	(price as of 2026-08-20)
Aug. 14, 2019	NPKI	A	1,101	$5.70	$6,276	53,725 Direct	+2.09%	Acquired	143.3% (price as of 2026-08-20)
June 1, 2019	NPKI	M	3,461	—	—	29,660 Direct	-10.45%	Disposed	(price as of 2026-08-20)
June 1, 2019	NPKI	M	4,717	—	—	33,121 Direct	-12.47%	Disposed	(price as of 2026-08-20)
June 1, 2019	NPKI	M	8,122	—	—	37,838 Direct	-17.67%	Disposed	(price as of 2026-08-20)
June 1, 2019	NPKI	F	842	$6.99	$5,886	52,624 Direct	-1.57%	Disposed	98.4% (price as of 2026-08-20)
June 1, 2019	NPKI	M	3,461	—	—	53,466 Direct	+6.92%	Acquired	(price as of 2026-08-20)
June 1, 2019	NPKI	F	1,148	$6.99	$8,025	50,005 Direct	-2.24%	Disposed	98.4% (price as of 2026-08-20)
June 1, 2019	NPKI	M	4,717	—	—	51,153 Direct	+10.16%	Acquired	(price as of 2026-08-20)
June 1, 2019	NPKI	F	1,977	$6.99	$13,819	46,436 Direct	-4.08%	Disposed	98.4% (price as of 2026-08-20)
June 1, 2019	NPKI	M	8,122	—	—	48,413 Direct	+20.16%	Acquired	(price as of 2026-08-20)
May 23, 2019	NPKI	A	16,766	—	—	45,960 Direct	+57.43%	Acquired	(price as of 2026-08-20)
Feb. 14, 2019	NPKI	A	770	$7.96	$6,129	40,291 Direct	+1.95%	Acquired	74.2% (price as of 2026-08-20)
Feb. 14, 2019	NPKI	A	739	$7.96	$5,882	40,260 Direct	+1.87%	Acquired	74.2% (price as of 2026-08-20)
Aug. 14, 2018	NPKI	A	858	$7.14	$6,126	39,521 Direct	+2.22%	Acquired	94.3% (price as of 2026-08-20)
June 1, 2018	NPKI	M	8,122	—	—	29,194 Direct	-21.77%	Disposed	(price as of 2026-08-20)
June 1, 2018	NPKI	M	3,462	—	—	37,316 Direct	-8.49%	Disposed	(price as of 2026-08-20)
June 1, 2018	NPKI	M	4,428	—	—	40,778 Direct	-9.80%	Disposed	(price as of 2026-08-20)
June 1, 2018	NPKI	F	1,977	$10.85	$21,450	38,663 Direct	-4.86%	Disposed	27.8% (price as of 2026-08-20)
June 1, 2018	NPKI	M	8,122	—	—	40,640 Direct	+24.98%	Acquired	(price as of 2026-08-20)
June 1, 2018	NPKI	F	842	$10.85	$9,136	32,518 Direct	-2.52%	Disposed	27.8% (price as of 2026-08-20)
June 1, 2018	NPKI	M	3,462	—	—	33,360 Direct	+11.58%	Acquired	(price as of 2026-08-20)
June 1, 2018	NPKI	F	1,078	$10.85	$11,696	29,898 Direct	-3.48%	Disposed	27.8% (price as of 2026-08-20)
June 1, 2018	NPKI	M	4,428	—	—	30,976 Direct	+16.68%	Acquired	(price as of 2026-08-20)
May 16, 2018	NPKI	A	14,150	—	—	45,206 Direct	+45.56%	Acquired	(price as of 2026-08-20)
Feb. 14, 2018	NPKI	A	930	$6.59	$6,129	26,548 Direct	+3.63%	Acquired	110.5% (price as of 2026-08-20)
Aug. 14, 2017	NPKI	A	175	$6.25	$1,094	25,618 Direct	+0.69%	Acquired	121.9% (price as of 2026-08-20)
June 30, 2017	NPKI	A	847	$6.25	$5,294	25,443 Direct	+3.44%	Acquired	121.9% (price as of 2026-08-20)
June 1, 2017	NPKI	M	8,123	—	—	31,056 Direct	-20.73%	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
June 1, 2025	NPKI	Restricted Stock Units	Common Stock (14,667)	—	—	14,667	Disposed
June 1, 2025	NPKI	Restricted Stock Units	Common Stock (17,333)	—	—	17,333	Disposed
June 1, 2024	NPKI	Restricted Stock Units	Common Stock (14,667)	—	—	14,667	Disposed
June 1, 2024	NPKI	Restricted Stock Units	Common Stock (17,333)	—	—	17,333	Disposed
June 1, 2024	NPKI	Restricted Stock Units	Common Stock (18,666)	—	—	18,666	Disposed
Nov. 20, 2023	NPKI	Restricted Stock Units	Common Stock (12,500)	—	—	12,500	Disposed
June 2, 2023	NPKI	Restricted Stock Units	Common Stock (17,333)	—	—	17,333	Disposed
June 1, 2023	NPKI	Restricted Stock Units	Common Stock (17,334)	—	—	17,334	Disposed
June 1, 2023	NPKI	Restricted Stock Units	Common Stock (18,667)	—	—	18,667	Disposed
May 18, 2023	NPKI	Restricted Stock Units	Common Stock (44,000)	$0.00	—	44,000	Acquired
June 1, 2022	NPKI	Restricted Stock Units	Common Stock (18,667)	—	—	18,667	Disposed
June 1, 2022	NPKI	Restricted Stock Units	Common Stock (5,588)	—	—	5,588	Disposed
June 1, 2022	NPKI	Restricted Stock Units	Common Stock (17,333)	—	—	17,333	Disposed
May 19, 2022	NPKI	Restricted Stock Units	Common Stock (52,000)	$0.00	—	52,000	Acquired
Nov. 20, 2021	NPKI	Restricted Stock Units	Common Stock (12,500)	—	—	12,500	Disposed
June 1, 2021	NPKI	Restricted Stock Units	Common Stock (4,716)	—	—	4,716	Disposed
June 1, 2021	NPKI	Restricted Stock Units	Common Stock (5,589)	—	—	5,589	Disposed
June 1, 2021	NPKI	Restricted Stock Units	Common Stock (17,334)	—	—	17,334	Disposed
May 20, 2021	NPKI	Restricted Stock Units	Common Stock (56,000)	$0.00	—	56,000	Acquired
June 1, 2020	NPKI	Restricted Stock Units	Common Stock (5,589)	—	—	5,589	Disposed
June 1, 2020	NPKI	Restricted Stock Units	Common Stock (4,717)	—	—	4,717	Disposed
June 1, 2020	NPKI	Restricted Stock Units	Common Stock (3,461)	—	—	3,461	Disposed
May 21, 2020	NPKI	Restricted Stock Units	Common Stock (52,000)	$0.00	—	52,000	Acquired
Nov. 20, 2019	NPKI	Restricted Stock Units	Common Stock (25,000)	$0.00	—	25,000	Acquired
June 1, 2019	NPKI	Restricted Stock Units	Common Stock (3,461)	—	—	3,461	Disposed
June 1, 2019	NPKI	Restricted Stock Units	Common Stock (4,717)	—	—	4,717	Disposed
June 1, 2019	NPKI	Restricted Stock Units	Common Stock (8,122)	—	—	8,122	Disposed
May 23, 2019	NPKI	Restricted Stock Units	Common Stock (16,766)	$0.00	—	16,766	Acquired
June 1, 2018	NPKI	Restricted Stock Units	Common Stock (8,122)	—	—	8,122	Disposed
June 1, 2018	NPKI	Restricted Stock Units	Common Stock (3,462)	—	—	3,462	Disposed
June 1, 2018	NPKI	Restricted Stock Units	Common Stock (4,428)	—	—	4,428	Disposed
May 16, 2018	NPKI	Restricted Stock Units	Common Stock (14,150)	$0.00	—	14,150	Acquired
June 1, 2017	NPKI	Restricted Stock Units	Common Stock (8,123)	—	—	8,123	Disposed
June 1, 2017	NPKI	Restricted Stock Units	Common Stock (4,428)	—	—	4,428	Disposed
June 1, 2016	NPKI	Restricted Stock Units	Common Stock (4,428)	—	—	4,428	Disposed
May 19, 2016	NPKI	Restricted Stock Units	Common Stock (24,367)	$0.00	—	24,367	Acquired
May 19, 2016	NPKI	Non-Qualified Stock Option (right to buy)	Common Stock (17,862)	$4.32	May 19, 2026	17,862	Acquired
May 22, 2015	NPKI	Restricted Stock Units	Common Stock (13,284)	$0.00	—	13,284	Acquired
May 22, 2015	NPKI	Non-Qualified Stock Option (right to buy)	Common Stock (10,181)	$9.00	May 21, 2025	10,181	Acquired

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

Initial ownership (Form 3) 2 holdings

Securities held when first becoming an insider, per SEC Form 3.

Date	Ticker	Security	Shares	Ownership
May 22, 2014	NPKI	Common Stock	10,781	Direct
May 22, 2014	NPKI	Non-Qualified Stock Option (right to buy)→ Common Stock (8,098)	8,098	Direct