Donald Eugene Brown

Insider

First SEC filing: April 16, 2015 · Latest: June 2, 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.
Initial holdings The stakes this person held when they first started reporting.
Compensation Executive pay disclosed in company proxy statements.

Insider at

Insider transactions

0 buys (P) 0 sells (S) Net: $0 + 59 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

59 other filings hidden

Date	Ticker	Code	Shares	Price	Value	Owned after	Δ own	A/D	vs now
June 1, 2026	ALL	A	917	—	—	917 Direct	—	Acquired	(price as of 2026-08-19)
June 2, 2025	ALL	A	894	—	—	894 Direct	—	Acquired	(price as of 2026-08-19)
Jan. 1, 2025	ALL	A	220	$192.79	$42,414	5,401 Direct	+4.25%	Acquired	38.2% (price as of 2026-08-19)
Oct. 1, 2024	ALL	A	210	$189.88	$39,875	5,181 Direct	+4.22%	Acquired	40.3% (price as of 2026-08-19)
July 1, 2024	ALL	A	277	$160.54	$44,470	4,958 Direct	+5.92%	Acquired	66.0% (price as of 2026-08-19)
June 1, 2024	ALL	A	1,045	—	—	1,045 Direct	—	Acquired	(price as of 2026-08-19)
June 1, 2024	ALL	M	1,124	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-19)
June 1, 2024	ALL	M	1,124	—	—	4,668 Direct	+31.72%	Acquired	(price as of 2026-08-19)
April 1, 2024	ALL	A	181	$172.57	$31,235	3,544 Direct	+5.38%	Acquired	54.4% (price as of 2026-08-19)
March 6, 2024	NI	S	37,490	$26.78	$1,003,982	195,855 Direct	-16.07%	Disposed	56.7% (price as of 2026-08-19)
Feb. 28, 2024	NI	F	4,869	$25.85	$125,864	233,345 Direct	-2.04%	Disposed	62.3% (price as of 2026-08-19)
Feb. 28, 2024	NI	F	5,692	$25.85	$147,138	238,214 Direct	-2.33%	Disposed	62.3% (price as of 2026-08-19)
Feb. 28, 2024	NI	F	36,175	$25.85	$935,124	243,906 Direct	-12.92%	Disposed	62.3% (price as of 2026-08-19)
Feb. 28, 2024	NI	A	12,654	$25.85	$327,106	280,081 Direct	+4.73%	Acquired	62.3% (price as of 2026-08-19)
Feb. 28, 2024	NI	A	80,432	$25.85	$2,079,167	267,427 Direct	+43.01%	Acquired	62.3% (price as of 2026-08-19)
Jan. 30, 2024	NI	F	10,632	$26.12	$277,708	186,995 Direct	-5.38%	Disposed	60.6% (price as of 2026-08-19)
Jan. 24, 2024	NI	A	10,349	$25.18	$260,588	197,627 Direct	+5.53%	Acquired	66.6% (price as of 2026-08-19)
Jan. 1, 2024	ALL	A	223	$139.98	$31,216	3,352 Direct	+7.13%	Acquired	90.4% (price as of 2026-08-19)
Nov. 1, 2023	ALL	M	1,019	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-19)
Nov. 1, 2023	ALL	M	1,019	—	—	3,116 Direct	+48.59%	Acquired	(price as of 2026-08-19)
Oct. 1, 2023	ALL	A	280	$111.41	$31,195	2,097 Direct	+15.41%	Acquired	139.2% (price as of 2026-08-19)
Aug. 8, 2023	NI	S	14,000	$26.64	$372,960	187,278 Direct	-6.96%	Disposed	57.5% (price as of 2026-08-19)
July 1, 2023	ALL	A	286	$109.04	$31,185	1,802 Direct	+18.87%	Acquired	144.4% (price as of 2026-08-19)
June 1, 2023	ALL	A	1,603	—	—	1,603 Direct	—	Acquired	(price as of 2026-08-19)
April 1, 2023	ALL	A	282	$110.81	$31,248	1,495 Direct	+23.25%	Acquired	140.5% (price as of 2026-08-19)
Feb. 28, 2023	NI	A	24,831	$27.43	$681,114	198,244 Direct	+14.32%	Acquired	53.0% (price as of 2026-08-19)
Feb. 28, 2023	NI	F	14,272	$27.43	$391,481	204,833 Direct	-6.51%	Disposed	53.0% (price as of 2026-08-19)
Feb. 28, 2023	NI	F	3,555	$27.43	$97,514	201,278 Direct	-1.74%	Disposed	53.0% (price as of 2026-08-19)
Feb. 28, 2023	NI	A	31,731	$27.43	$870,381	219,105 Direct	+16.93%	Acquired	53.0% (price as of 2026-08-19)
Feb. 28, 2023	NI	F	10,870	$27.43	$298,164	187,374 Direct	-5.48%	Disposed	53.0% (price as of 2026-08-19)
Jan. 25, 2023	NI	A	9,355	$27.58	$258,011	173,413 Direct	+5.70%	Acquired	52.1% (price as of 2026-08-19)
Jan. 1, 2023	ALL	A	230	$135.60	$31,188	1,207 Direct	+23.54%	Acquired	96.5% (price as of 2026-08-19)
Oct. 1, 2022	ALL	A	250	$124.53	$31,132	977 Direct	+34.39%	Acquired	114.0% (price as of 2026-08-19)
July 1, 2022	ALL	A	239	$130.70	$31,237	727 Direct	+48.98%	Acquired	103.9% (price as of 2026-08-19)
June 1, 2022	ALL	A	1,300	—	—	1,300 Direct	—	Acquired	(price as of 2026-08-19)
April 1, 2022	ALL	A	223	$139.54	$31,117	488 Direct	+84.15%	Acquired	91.0% (price as of 2026-08-19)
Feb. 28, 2022	NI	F	3,658	$28.93	$105,826	164,058 Direct	-2.18%	Disposed	45.0% (price as of 2026-08-19)
Feb. 28, 2022	NI	F	11,268	$28.93	$325,983	167,716 Direct	-6.30%	Disposed	45.0% (price as of 2026-08-19)
Feb. 28, 2022	NI	A	24,846	$28.93	$718,795	178,984 Direct	+16.12%	Acquired	45.0% (price as of 2026-08-19)
Jan. 28, 2022	NI	A	8,200	$29.27	$240,014	154,138 Direct	+5.62%	Acquired	43.4% (price as of 2026-08-19)
Jan. 1, 2022	ALL	A	265	$117.65	$31,177	265 Direct	—	Acquired	126.5% (price as of 2026-08-19)
Aug. 20, 2021	NI	S	19,762	$25.68	$507,488	145,938 Direct	-11.93%	Disposed	63.4% (price as of 2026-08-19)
June 1, 2021	ALL	A	1,124	—	—	1,124 Direct	—	Acquired	(price as of 2026-08-19)
Feb. 26, 2021	NI	F	2,362	$21.60	$51,019	165,700 Direct	-1.41%	Disposed	94.3% (price as of 2026-08-19)
Feb. 26, 2021	NI	F	5,199	$21.60	$112,298	168,062 Direct	-3.00%	Disposed	94.3% (price as of 2026-08-19)
Feb. 26, 2021	NI	A	17,127	$21.60	$369,943	173,261 Direct	+10.97%	Acquired	94.3% (price as of 2026-08-19)
Jan. 28, 2021	NI	A	10,825	$22.17	$239,990	156,134 Direct	+7.45%	Acquired	89.3% (price as of 2026-08-19)
Nov. 1, 2020	ALL	A	1,019	—	—	1,019 Direct	—	Acquired	(price as of 2026-08-19)
Feb. 28, 2020	NI	F	14,366	$27.02	$388,169	145,309 Direct	-9.00%	Disposed	55.3% (price as of 2026-08-19)
Feb. 28, 2020	NI	A	40,504	$27.02	$1,094,418	159,675 Direct	+33.99%	Acquired	55.3% (price as of 2026-08-19)
Jan. 30, 2020	NI	A	34,364	$29.10	$999,992	119,171 Direct	+40.52%	Acquired	44.2% (price as of 2026-08-19)
Jan. 30, 2020	NI	A	7,904	$29.10	$230,006	84,807 Direct	+10.28%	Acquired	44.2% (price as of 2026-08-19)
Aug. 6, 2019	NI	S	700	$28.05	$19,635	76,903 Direct	-0.90%	Disposed	49.6% (price as of 2026-08-19)
Aug. 6, 2019	NI	S	9,300	$28.04	$260,772	77,603 Direct	-10.70%	Disposed	49.6% (price as of 2026-08-19)
Feb. 28, 2019	NI	F	16,478	$26.98	$444,576	86,903 Direct	-15.94%	Disposed	55.5% (price as of 2026-08-19)
Feb. 28, 2019	NI	A	48,549	$26.98	$1,309,852	103,381 Direct	+88.54%	Acquired	55.5% (price as of 2026-08-19)
Jan. 31, 2019	NI	A	8,065	$27.28	$220,013	54,832 Direct	+17.25%	Acquired	53.8% (price as of 2026-08-19)
Nov. 8, 2018	NI	S 10b5-1	2,400	$26.18	$62,832	46,767 Direct	-4.88%	Disposed	60.3% (price as of 2026-08-19)
Aug. 8, 2018	NI	S 10b5-1	2,400	$26.50	$63,600	49,167 Direct	-4.65%	Disposed	58.3% (price as of 2026-08-19)
Feb. 2, 2018	NI	F	16,421	$23.97	$393,611	51,567 Direct	-24.15%	Disposed	75.1% (price as of 2026-08-19)
Jan. 25, 2018	NI	A	7,781	$24.42	$190,012	67,988 Direct	+12.92%	Acquired	71.8% (price as of 2026-08-19)
Jan. 25, 2018	NI	A	6,225	$24.42	$152,014	66,432 Direct	+10.34%	Acquired	71.8% (price as of 2026-08-19)
May 25, 2017	NI	S	6,906	$25.51	$176,172	141,168 Direct	-4.66%	Disposed	64.5% (price as of 2026-08-19)
April 6, 2017	NI	F	7,018	$23.84	$167,309	148,074 Direct	-4.53%	Disposed	76.0% (price as of 2026-08-19)
Jan. 26, 2017	NI	A	40,504	$22.22	$899,999	155,092 Direct	+35.35%	Acquired	88.8% (price as of 2026-08-19)
April 6, 2016	NI	F	3,456	$23.44	$81,009	114,588 Direct	-2.93%	Disposed	79.0% (price as of 2026-08-19)
Jan. 29, 2016	NI	A	40,457	$21.01	$850,002	118,044 Direct	+52.14%	Acquired	99.7% (price as of 2026-08-19)

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, 2026	ALL	Restricted Stock Units	Common Stock (917)	—	—	917	Acquired
June 2, 2025	ALL	Restricted Stock Units	Common Stock (894)	—	—	894	Acquired
June 1, 2024	ALL	Restricted Stock Units	Common Stock (1,045)	—	—	1,045	Acquired
June 1, 2024	ALL	Restricted Stock Units	Common Stock (1,124)	—	June 1, 2024	1,124	Disposed
Nov. 1, 2023	ALL	Restricted Stock Units	Common Stock (1,019)	—	Nov. 1, 2023	1,019	Disposed
June 1, 2023	ALL	Restricted Stock Units	Common Stock (1,603)	—	—	1,603	Acquired
June 1, 2022	ALL	Restricted Stock Units	Common Stock (1,300)	—	—	1,300	Acquired
June 1, 2021	ALL	Restricted Stock Units	Common Stock (1,124)	—	—	1,124	Acquired
Nov. 1, 2020	ALL	Restricted Stock Units	Common Stock (1,019)	—	—	1,019	Acquired

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

Initial ownership (Form 3) 1 holding

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

Date	Ticker	Security	Shares	Ownership
April 16, 2015	NI	Common Stock	28,207	Direct

Compensation (DEF 14A)

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

NI

CFO and President, NCS

Fiscal year	Salary	Bonus	Stock awards	Option awards	Non-equity incentive	Pension change	Other	Total
2022	$628,300	$500,000	$1,245,681	—	$445,025	—	$56,234	$2,875,240
2021	$615,000	—	$1,738,219	—	$520,000	—	$59,722	$2,932,941
2020	$600,000	—	$3,084,923	—	$180,000	—	$52,003	$3,916,926

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