Gerald Garrett

Insider

First SEC filing: March 12, 2020 · Latest: March 12, 2020

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Insider at

0 buys (P) 0 sells (S) Net: $0 + 4 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
Feb. 17, 2022	MRKR	A	40,000	—	—	40,000 Direct	—	Acquired	(price as of 2026-08-20)
Feb. 10, 2021	MRKR	A	40,000	—	—	40,000 Direct	—	Acquired	(price as of 2026-08-20)
March 10, 2020	MRKR	A	1,700	—	—	1,700 Direct	—	Acquired	(price as of 2026-08-20)
March 10, 2020	MRKR	A	38,300	—	—	38,300 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
Feb. 17, 2022	MRKR	Employee Stock Option (right to buy)	Common Stock (40,000)	$0.46	Feb. 17, 2032	40,000	Acquired
Feb. 10, 2021	MRKR	Employee Stock Option (right to buy)	Common Stock (40,000)	$3.29	Feb. 10, 2031	40,000	Acquired
March 10, 2020	MRKR	Employee Stock Option (Right to Buy)	Common Stock (1,700)	$2.12	March 10, 2030	1,700	Acquired
March 10, 2020	MRKR	Employee Stock Option (Right to Buy)	Common Stock (38,300)	$2.12	March 10, 2030	38,300	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
March 12, 2020	MRKR	Employee Stock Option (Right to Buy)→ Common Stock (20,000)	20,000	Direct
March 12, 2020	MRKR	Employee Stock Option (Right to Buy)→ Common Stock (200,000)	200,000	Direct