John Richard Sylvester

Insider

First SEC filing: Nov. 25, 2020 · Latest: Nov. 25, 2020

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Insider at

0 buys (P) 0 sells (S) Net: $0 + 5 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

5 other filings hidden

Date	Ticker	Code	Shares	Price	Value	Owned after	Δ own	A/D	vs now
May 23, 2024	DCTH	A	22,500	—	—	22,500 Direct	—	Acquired	(price as of 2026-08-20)
Aug. 21, 2023	DCTH	P	10,550	$4.80	$50,640	10,550 Direct	—	Acquired	254.0% (price as of 2026-08-20)
June 12, 2023	DCTH	A	19,682	—	—	19,682 Direct	—	Acquired	(price as of 2026-08-20)
May 4, 2022	DCTH	A	9,000	—	—	9,000 Direct	—	Acquired	(price as of 2026-08-20)
Aug. 5, 2021	DCTH	A	9,000	—	—	9,000 Direct	—	Acquired	(price as of 2026-08-20)
Nov. 23, 2020	DCTH	A	30,000	—	—	30,000 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
May 23, 2024	DCTH	Stock Option (right to buy)	Common Stock (22,500)	$7.85	—	22,500	Acquired
June 12, 2023	DCTH	Stock Option (Right to Buy)	Common Stock (19,682)	$7.25	June 12, 2033	19,682	Acquired
May 4, 2022	DCTH	Stock Option (Right to Buy)	Common Stock (9,000)	$6.24	May 4, 2023	9,000	Acquired
Aug. 5, 2021	DCTH	Stock Option (right to buy)	Common Stock (9,000)	$10.16	Aug. 5, 2031	9,000	Acquired
Nov. 23, 2020	DCTH	Stock Option (right to buy)	Common Stock (30,000)	$11.67	Oct. 1, 2030	30,000	Acquired

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