Steven J Rosenstone

Insider

First SEC filing: May 10, 2018 · Latest: May 10, 2018

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Insider at

0 buys (P) 0 sells (S) Net: $0 + 6 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

6 other filings hidden

Date	Ticker	Code	Shares	Price	Value	Owned after	Δ own	A/D	vs now
May 17, 2023	NSYS	M	1,000	$3.29	$3,290	8,000 Direct	+14.29%	Acquired	255.6% (price as of 2026-08-21)
May 17, 2023	NSYS	F	356	$9.25	$3,293	7,644 Direct	-4.45%	Disposed	26.5% (price as of 2026-08-21)
May 17, 2023	NSYS	M	1,000	$9.25	$9,250	2,000 Direct	-33.33%	Disposed	26.5% (price as of 2026-08-21)
May 12, 2023	NSYS	A	3,000	$9.39	$28,170	7,000 Direct	+75.00%	Acquired	24.6% (price as of 2026-08-21)
March 17, 2022	NSYS	A	3,000	$11.80	$35,400	4,000 Direct	+300.00%	Acquired	-0.8% (price as of 2026-08-21)
Nov. 20, 2020	NSYS	P	500	$4.30	$2,150	1,000 Direct	+100.00%	Acquired	172.1% (price as of 2026-08-21)
Nov. 19, 2020	NSYS	P	500	$4.33	$2,165	500 Direct	—	Acquired	170.2% (price as of 2026-08-21)
May 9, 2018	NSYS	A	3,000	—	—	3,000 Direct	—	Acquired	(price as of 2026-08-21)

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.

Options, RSUs and convertible securities reported on Form 4 Table II.

Date	Ticker	Security	Underlying	Exercise price	Expiration	Shares	A/D
May 17, 2023	NSYS	Common Stock Options	Common Stock (1,000)	$3.29	May 9, 2028	1,000	Disposed
May 9, 2018	NSYS	Stock Options (right to buy)	Common Stock (3,000)	$3.29	May 9, 2028	3,000	Acquired

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

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

Date	Ticker	Security	Shares	Ownership
May 10, 2018	NSYS	Common Stock	0	Direct