Vern Lee Schramm

Insider

First SEC filing: Feb. 13, 2018 · Latest: Feb. 13, 2018

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Insider at

0 buys (P) 0 sells (S) Net: $0 + 15 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
Jan. 3, 2022	GRDX	A	34,482	—	—	34,482 Direct	—	Acquired	(price as of 2026-08-21)
Jan. 4, 2021	GRDX	A	41,237	—	—	41,237 Direct	—	Acquired	(price as of 2026-08-21)
April 6, 2020	GRDX	A	80,000	—	—	80,000 Direct	—	Acquired	(price as of 2026-08-21)
March 11, 2020	GRDX	A	14,584	$0.60	$8,750	82,084 Direct	+21.61%	Acquired	-100.0% (price as of 2026-08-21)
March 11, 2020	GRDX	A	8,414	$1.04	$8,751	90,498 Direct	+10.25%	Acquired	-100.0% (price as of 2026-08-21)
Dec. 31, 2019	GRDX	A	7,500	$1.04	$7,800	67,500 Direct	+12.50%	Acquired	-100.0% (price as of 2026-08-21)
Sept. 30, 2019	GRDX	A	7,500	$0.60	$4,500	60,000 Direct	+14.29%	Acquired	-100.0% (price as of 2026-08-21)
June 30, 2019	GRDX	A	7,500	$1.70	$12,750	52,500 Direct	+16.67%	Acquired	-100.0% (price as of 2026-08-21)
June 13, 2019	GRDX	A	30,000	—	—	30,000 Direct	—	Acquired	(price as of 2026-08-21)
June 13, 2019	GRDX	A	30,000	—	—	75,000 Direct	+66.67%	Acquired	(price as of 2026-08-21)
March 31, 2019	GRDX	A	7,500	$2.42	$18,150	45,000 Direct	+20.00%	Acquired	-100.0% (price as of 2026-08-21)
Dec. 28, 2018	GRDX	A	7,500	$1.29	$9,675	37,500 Direct	+25.00%	Acquired	-100.0% (price as of 2026-08-21)
Sept. 28, 2018	GRDX	A	7,500	$2.57	$19,275	30,000 Direct	+33.33%	Acquired	-100.0% (price as of 2026-08-21)
June 30, 2018	GRDX	A	7,500	—	—	22,500 Direct	+50.00%	Acquired	(price as of 2026-08-21)
March 29, 2018	GRDX	A	7,500	$3.14	$23,550	15,000 Direct	+100.00%	Acquired	-100.0% (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
Jan. 3, 2022	GRDX	Stock option (right to buy)	Common stock, par value $0.0001 per share (34,482)	$1.45	Jan. 3, 2032	34,482	Acquired
Jan. 4, 2021	GRDX	Options (right to buy)	Common stock, par value $0.0001 per share (41,237)	$0.97	Jan. 3, 2031	41,237	Acquired
April 6, 2020	GRDX	Options	Common Stock (80,000)	$0.97	April 6, 2030	80,000	Acquired
June 13, 2019	GRDX	Options	Common Stock (30,000)	$1.75	June 13, 2024	30,000	Acquired

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