Jeffrey S. White

Insider

First SEC filing: Feb. 12, 2014 · Latest: Feb. 12, 2014

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Insider at

0 buys (P) 0 sells (S) Net: $0 + 3 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

3 other filings hidden

Date	Ticker	Code	Shares	Price	Value	Owned after	Δ own	A/D	vs now
Jan. 4, 2016	SINT	A	15,000	—	—	70,000 Direct	+27.27%	Acquired	(price as of 2026-08-20)
Jan. 7, 2015	SINT	A	15,000	—	—	55,000 Direct	+37.50%	Acquired	(price as of 2026-08-20)
Dec. 29, 2014	SINT	A	40,000	—	—	40,000 Direct	—	Acquired	(price as of 2026-08-20)
Dec. 8, 2014	SINT	P	9,600	$0.62	$5,952	9,600 Indirect	—	Acquired	-100.0% (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
Jan. 4, 2016	SINT	Stock Options	Common Shares (15,000)	$0.11	Jan. 4, 2026	15,000	Acquired
Jan. 7, 2015	SINT	Stock Option	Common Stock (15,000)	$0.97	Jan. 7, 2025	15,000	Acquired
Dec. 29, 2014	SINT	Stock Option	Common Stock (40,000)	$0.68	Dec. 29, 2024	40,000	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
Feb. 12, 2014	SINT	No securities are beneficially owned	0	Direct