Mark L First

Insider

First SEC filing: June 11, 2026 · Latest: June 11, 2026

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Insider at Companies where this person is a reporting insider.
Insider transactions Every share this person bought or sold, from Form 4 filings.
Derivatives Options and other derivative holdings reported by this person.
Initial holdings The stakes this person held when they first started reporting.

Insider at

ADUS selling Dec. 8, 2020

Insider transactions

0 buys (P) 0 sells (S) Net: $0 + 22 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

22 other filings hidden

Date	Ticker	Code	Shares	Price	Value	Owned after	Δ own	A/D	vs now
June 10, 2026	ADUS	A	1,449	—	—	15,070	—	—	(price as of 2026-08-19)
June 18, 2025	ADUS	A	1,172	—	—	13,621 Direct	+9.41%	Acquired	(price as of 2026-08-19)
Sept. 5, 2024	ADUS	G	7,942	—	—	12,449 Direct	-38.95%	Disposed	(price as of 2026-08-19)
June 12, 2024	ADUS	A	1,013	—	—	20,391 Direct	+5.23%	Acquired	(price as of 2026-08-19)
June 14, 2023	ADUS	A	1,289	—	—	19,378 Direct	+7.13%	Acquired	(price as of 2026-08-19)
Nov. 15, 2022	ADUS	G	5,918	—	—	18,089 Direct	-24.65%	Disposed	(price as of 2026-08-19)
June 15, 2022	ADUS	A	1,406	—	—	24,007 Direct	+6.22%	Acquired	(price as of 2026-08-19)
June 16, 2021	ADUS	A	1,304	—	—	22,601 Direct	+6.12%	Acquired	(price as of 2026-08-19)
Dec. 9, 2020	ADUS	J	52,774	—	—	0 Indirect	-100.00%	Disposed	(price as of 2026-08-19)
Dec. 8, 2020	ADUS	S	513,864	$100.75	$51,771,798	52,774 Indirect	-90.69%	Disposed	19.4% (price as of 2026-08-19)
Oct. 27, 2020	ADUS	A	1,075	—	—	21,297 Direct	+5.32%	Acquired	(price as of 2026-08-19)
Aug. 13, 2020	ADUS	S	475,000	$94.26	$44,773,500	566,638 Indirect	-45.60%	Disposed	27.6% (price as of 2026-08-19)
Nov. 13, 2019	ADUS	S	690,000	$82.55	$56,959,500	1,041,638 Indirect	-39.85%	Disposed	45.7% (price as of 2026-08-19)
June 12, 2019	ADUS	A	1,071	—	—	20,222 Direct	+5.59%	Acquired	(price as of 2026-08-19)
June 11, 2019	ADUS	S	440,000	$74.08	$32,595,200	1,731,638 Indirect	-20.26%	Disposed	62.3% (price as of 2026-08-19)
Nov. 28, 2018	ADUS	S	2,183	$73.08	$159,534	2,171,638 Indirect	-0.10%	Disposed	64.5% (price as of 2026-08-19)
Nov. 28, 2018	ADUS	S	185,417	$72.19	$13,385,253	2,173,821 Indirect	-7.86%	Disposed	66.6% (price as of 2026-08-19)
Nov. 27, 2018	ADUS	S	2,825	$75.21	$212,468	2,359,238 Indirect	-0.12%	Disposed	59.9% (price as of 2026-08-19)
Nov. 27, 2018	ADUS	S	78,915	$74.31	$5,864,174	2,362,063 Indirect	-3.23%	Disposed	61.8% (price as of 2026-08-19)
Nov. 27, 2018	ADUS	S	16,140	$73.23	$1,181,932	2,440,978 Indirect	-0.66%	Disposed	64.2% (price as of 2026-08-19)
Nov. 27, 2018	ADUS	S	254,520	$72.00	$18,325,440	2,457,118 Indirect	-9.39%	Disposed	67.0% (price as of 2026-08-19)
Aug. 20, 2018	ADUS	S	1,024,733	$59.00	$60,459,247	2,711,638 Indirect	-27.43%	Disposed	103.8% (price as of 2026-08-19)
June 13, 2018	ADUS	A	1,340	—	—	19,151 Direct	+7.52%	Acquired	(price as of 2026-08-19)
June 14, 2017	ADUS	A	2,024	—	—	17,811 Direct	+12.82%	Acquired	(price as of 2026-08-19)
May 11, 2017	ADUS	S	160,000	$39.40	$6,304,000	3,736,371 Indirect	-4.11%	Disposed	205.2% (price as of 2026-08-19)
June 15, 2016	ADUS	A	2,045	—	—	3,912,158 Direct	+0.05%	Acquired	(price as of 2026-08-19)
Sept. 15, 2015	ADUS	S	23,823	$32.09	$764,480	3,896,371 Indirect	-0.61%	Disposed	274.7% (price as of 2026-08-19)
Sept. 14, 2015	ADUS	S	30,306	$32.26	$977,672	3,920,194 Indirect	-0.77%	Disposed	272.8% (price as of 2026-08-19)
Sept. 11, 2015	ADUS	S	72,500	$33.11	$2,400,475	3,950,500 Indirect	-1.80%	Disposed	263.2% (price as of 2026-08-19)
June 17, 2015	ADUS	A	1,403	—	—	4,036,742 Direct	+0.03%	Acquired	(price as of 2026-08-19)
June 18, 2014	ADUS	A	920	—	—	4,035,339 Direct	+0.02%	Acquired	(price as of 2026-08-19)
June 19, 2013	ADUS	A	1,007	—	—	4,034,419 Direct	+0.02%	Acquired	(price as of 2026-08-19)
June 20, 2012	ADUS	A	7,412	—	—	4,033,412 Direct	+0.18%	Acquired	(price as of 2026-08-19)
March 30, 2011	ADUS	A	2,000	—	—	4,026,000 Direct	+0.05%	Acquired	(price as of 2026-08-19)
Nov. 2, 2009	ADUS	C	37,250	—	—	0 Indirect	-100.00%	Disposed	(price as of 2026-08-19)
Nov. 2, 2009	ADUS	C	4,023,000	—	—	4,023,000 Indirect	—	Acquired	(price as of 2026-08-19)
Oct. 27, 2009	ADUS	A	1,000	—	—	1,000 Direct	—	Acquired	(price as of 2026-08-19)

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.

Derivative holdings (Form 4 Table II)

Options, RSUs and convertible securities reported on Form 4 Table II.

Date	Ticker	Security	Underlying	Exercise price	Expiration	Shares	A/D
Nov. 2, 2009	ADUS	Series A Convertible Preferred Stock	Common Stock (4,023,000)	—	—	37,250	Disposed

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

Initial ownership (Form 3) 1 holding

Securities held when first becoming an insider, per SEC Form 3.

Date	Ticker	Security	Shares	Ownership
Oct. 27, 2009	ADUS	Series A Convertible Preferred Stock→ Common Stock (4,023,000)	4,023,000	Indirect