Seifrick A John

Insider

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

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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

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

Date	Ticker	Code	Shares	Price	Value	Owned after	Δ own	A/D	vs now
June 3, 2026	MTEX	A	5,000	$5.77	$28,850	—	—	—	7.8% (price as of 2026-08-20)
Jan. 2, 2025	MTEX	A	2,686	$14.89	$39,995	8,956 Direct	+42.84%	Acquired	-58.2% (price as of 2026-08-20)
Jan. 2, 2024	MTEX	A	4,932	$8.11	$39,999	6,270 Direct	+368.61%	Acquired	-23.3% (price as of 2026-08-20)
June 7, 2023	MTEX	A	5,000	—	—	6,807 Direct	+276.70%	Acquired	(price as of 2026-08-20)
Jan. 3, 2023	MTEX	A	1,338	$17.43	$23,321	1,338 Direct	—	Acquired	-64.3% (price as of 2026-08-20)
May 10, 2022	MTEX	A	1,807	—	—	1,807 Direct	—	Acquired	(price as of 2026-08-20)

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
June 7, 2023	MTEX	Right to Purchase Common Stock	Common Stock, par value $0.0001 per share (5,000)	$12.58	June 7, 2033	5,000	Acquired
May 10, 2022	MTEX	Right to Purchase Common Stock	Common Stock, par value $0.0001 per share (1,807)	$31.10	May 10, 2032	1,807	Acquired

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