Gus D Halas

Insider

First SEC filing: Aug. 13, 2014 · Latest: Aug. 13, 2014

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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.
Compensation Executive pay disclosed in company proxy statements.

Insider at

Insider transactions

0 buys (P) 0 sells (S) Net: $0 + 38 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

38 other filings hidden

Date	Ticker	Code	Shares	Price	Value	Owned after	Δ own	A/D	vs now
June 9, 2022	OPRX	A	4,637	—	—	4,637 Direct	—	Acquired	(price as of 2026-08-20)
March 30, 2022	OPRX	A	657	—	—	657 Direct	—	Acquired	(price as of 2026-08-20)
Dec. 30, 2021	OPRX	A	409	—	—	743 Direct	+122.46%	Acquired	(price as of 2026-08-20)
Sept. 29, 2021	OPRX	A	334	—	—	334 Direct	—	Acquired	(price as of 2026-08-20)
June 30, 2021	OPRX	A	407	—	—	64,828 Direct	+0.63%	Acquired	(price as of 2026-08-20)
March 31, 2021	OPRX	A	539	—	—	64,421 Direct	+0.84%	Acquired	(price as of 2026-08-20)
Dec. 31, 2020	OPRX	A	802	—	—	63,882 Direct	+1.27%	Acquired	(price as of 2026-08-20)
Sept. 30, 2020	OPRX	A	1,183	—	—	63,080 Direct	+1.91%	Acquired	(price as of 2026-08-20)
June 30, 2020	OPRX	A	1,937	—	—	61,897 Direct	+3.23%	Acquired	(price as of 2026-08-20)
March 30, 2020	OPRX	A	2,784	—	—	59,960 Direct	+4.87%	Acquired	(price as of 2026-08-20)
Jan. 3, 2020	OPRX	A	2,084	—	—	57,176 Direct	+3.78%	Acquired	(price as of 2026-08-20)
Nov. 13, 2019	OPRX	P	5,000	$9.80	$49,000	55,092 Direct	+9.98%	Acquired	-17.4% (price as of 2026-08-20)
Sept. 30, 2019	OPRX	A	2,084	—	—	50,092 Direct	+4.34%	Acquired	(price as of 2026-08-20)
March 29, 2019	OPRX	A	2,084	—	—	48,008 Direct	+4.54%	Acquired	(price as of 2026-08-20)
Nov. 19, 2018	OPRX	A	3,000	$14.30	$42,900	45,924 Direct	+6.99%	Acquired	-43.4% (price as of 2026-08-20)
Oct. 8, 2018	OPRX	A	2,084	—	—	42,924 Direct	+5.10%	Acquired	(price as of 2026-08-20)
June 29, 2018	OPRX	A	2,084	—	—	40,840 Direct	+5.38%	Acquired	(price as of 2026-08-20)
Jan. 10, 2018	OPRX	A	6,250	—	—	116,269 Direct	+5.68%	Acquired	(price as of 2026-08-20)
Sept. 29, 2017	OPRX	A	6,250	—	—	110,019 Direct	+6.02%	Acquired	(price as of 2026-08-20)
June 30, 2017	OPRX	A	6,250	—	—	103,769 Direct	+6.41%	Acquired	(price as of 2026-08-20)
March 31, 2017	OPRX	A	6,250	—	—	97,519 Direct	+6.85%	Acquired	(price as of 2026-08-20)
March 21, 2017	OPRX	P	16,990	$0.77	$13,082	91,269 Direct	+22.87%	Acquired	250.2% (price as of 2026-08-20)
March 20, 2017	OPRX	P	5,000	$0.77	$3,850	74,279 Direct	+7.22%	Acquired	250.2% (price as of 2026-08-20)
March 9, 2017	OPRX	P	8,010	$0.74	$5,927	69,279 Direct	+13.07%	Acquired	264.4% (price as of 2026-08-20)
Dec. 31, 2016	OPRX	A	6,250	—	—	61,269 Direct	+11.36%	Acquired	(price as of 2026-08-20)
July 13, 2016	OPRX	A	6,250	—	—	55,019 Direct	+12.82%	Acquired	(price as of 2026-08-20)
Oct. 6, 2015	OPRX	P	10,000	$1.26	$12,600	48,769 Direct	+25.79%	Acquired	114.0% (price as of 2026-08-20)
Sept. 30, 2015	OPRX	A	6,250	—	—	38,769 Direct	+19.22%	Acquired	(price as of 2026-08-20)
June 30, 2015	OPRX	A	6,250	—	—	32,519 Direct	+23.79%	Acquired	(price as of 2026-08-20)
April 29, 2015	OPRX	A	6,250	$1.15	$7,188	26,269 Direct	+31.22%	Acquired	134.5% (price as of 2026-08-20)
Jan. 23, 2015	OPRX	A	6,250	$1.09	$6,812	20,019 Direct	+45.39%	Acquired	147.4% (price as of 2026-08-20)
Oct. 15, 2014	OPRX	A	3,769	$0.96	$3,618	13,769 Direct	+37.69%	Acquired	180.9% (price as of 2026-08-20)
Oct. 18, 2012	CENTA	F	6,419	$12.16	$78,055	71,579 Direct	-8.23%	Disposed	290.5% (price as of 2026-08-20)
June 18, 2012	CENTA	A	17,500	—	—	77,998 Direct	+28.93%	Acquired	(price as of 2026-08-20)
April 2, 2012	CENTA	A	65,000	—	—	65,000 Direct	—	Acquired	(price as of 2026-08-20)
March 26, 2012	CENTA	A	300,000	—	—	300,000 Direct	—	Acquired	(price as of 2026-08-20)
Feb. 14, 2012	CENTA	F	15,810	$9.28	$146,717	60,498 Direct	-20.72%	Disposed	411.7% (price as of 2026-08-20)
Feb. 14, 2012	CENTA	A	43,103	—	—	76,308 Direct	+129.81%	Acquired	(price as of 2026-08-20)
Nov. 26, 2011	CENTA	F	7,718	$8.01	$61,821	33,205 Direct	-18.86%	Disposed	492.9% (price as of 2026-08-20)
Aug. 11, 2011	CENTA	F	11,577	$7.14	$82,660	40,923 Direct	-22.05%	Disposed	565.1% (price as of 2026-08-20)
May 26, 2011	CENTA	A	21,000	—	—	21,000 Direct	—	Acquired	(price as of 2026-08-20)
April 15, 2011	CENTA	A	357,010	—	—	357,010 Direct	—	Acquired	(price as of 2026-08-20)
April 15, 2011	CENTA	A	357,010	—	—	357,010 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.

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
June 9, 2022	OPRX	Restricted Stock Units	Common Stock (4,637)	—	—	4,637	Acquired
March 30, 2022	OPRX	Restricted Stock Units	Common Stock (657)	—	—	657	Acquired
Dec. 30, 2021	OPRX	Restricted Stock Units	Common Stock (409)	—	—	409	Acquired
Sept. 29, 2021	OPRX	Restricted Stock Units	Common Stock (334)	—	—	334	Acquired
April 2, 2012	CENTA	Stock Option (Right to Buy)	Class A Common Stock (65,000)	$9.71	April 2, 2018	65,000	Acquired
March 26, 2012	CENTA	Stock Option (Right to Buy)	Class A Common Stock (300,000)	$9.54	March 26, 2018	300,000	Acquired
April 15, 2011	CENTA	Stock Option (Right to Buy)	Common Stock (357,010)	$15.00	April 15, 2017	357,010	Acquired
April 15, 2011	CENTA	Stock Option (Right to Buy)	Common Stock (357,010)	$12.50	April 15, 2017	357,010	Acquired

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

Initial ownership (Form 3) 4 holdings

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

Date	Ticker	Security	Shares	Ownership
Aug. 13, 2014	OPRX	Common Stock	10,000	Direct
Feb. 24, 2011	CENTA	Common Stock	0	Direct
Feb. 24, 2011	CENTA	Class A Common Stock	—	Direct
Feb. 24, 2011	CENTA	Stock Option (Right to Buy) [F2]→ Class A Common Stock (300,000)	300,000	Direct

Compensation (DEF 14A)

Matched by name from proxy statements (DEF 14A) — verify against the filing.

CENTA

CEO

Fiscal year	Salary	Bonus	Stock awards	Option awards	Non-equity incentive	Pension change	Other	Total
2013	—	—	—	—	—	—	—	—
2012	—	—	—	—	—	—	—	—

Figures from the Summary Compensation Table of the company's proxy statement (DEF 14A). Compensation is not a recommendation.