Gregory L. Jackson

Insider

First SEC filing: Feb. 14, 2013 · Latest: Feb. 14, 2013

On this page

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.

Insider at

PRDO selling Aug. 11, 2026

Insider transactions

0 buys (P) 1 sells (S) Net: $-358,192 + 30 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

30 other filings hidden

Date	Ticker	Code	Shares	Price	Value	Owned after	Δ own	A/D	vs now
Aug. 11, 2026	PRDO	M	11,271	$9.69	$109,216	76,220 Direct	+17.35%	Acquired	237.1% (price as of 2026-08-20)
Aug. 11, 2026	PRDO	S	11,271	$31.78	$358,192	64,949 Direct	-14.79%	Disposed	2.8% (price as of 2026-08-20)
Aug. 11, 2026	PRDO	M	11,271	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
May 21, 2026	PRDO	A	3,987	—	—	64,949 Direct	+6.54%	Acquired	(price as of 2026-08-20)
May 22, 2025	PRDO	A	5,155	—	—	60,962 Direct	+9.24%	Acquired	(price as of 2026-08-20)
Aug. 6, 2024	PRDO	M	26,664	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
Aug. 6, 2024	PRDO	S	26,664	$22.70	$605,273	58,644 Direct	-31.26%	Disposed	43.9% (price as of 2026-08-20)
Aug. 6, 2024	PRDO	M	26,664	$3.93	$104,790	85,308 Direct	+45.47%	Acquired	731.2% (price as of 2026-08-20)
May 23, 2024	PRDO	A	6,256	—	—	58,644 Direct	+11.94%	Acquired	(price as of 2026-08-20)
May 25, 2023	PRDO	A	7,827	—	—	52,388 Direct	+17.56%	Acquired	(price as of 2026-08-20)
March 2, 2023	PRDO	M	4,174	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
March 2, 2023	PRDO	S	4,174	$13.60	$56,766	44,561 Direct	-8.56%	Disposed	140.2% (price as of 2026-08-20)
March 2, 2023	PRDO	M	4,174	$2.82	$11,771	48,735 Direct	+9.37%	Acquired	1058.3% (price as of 2026-08-20)
March 1, 2023	PRDO	M	11,826	—	—	4,174 Direct	-73.91%	Disposed	(price as of 2026-08-20)
March 1, 2023	PRDO	S	11,826	$13.81	$163,317	44,561 Direct	-20.97%	Disposed	136.5% (price as of 2026-08-20)
March 1, 2023	PRDO	M	11,826	$2.82	$33,349	56,387 Direct	+26.54%	Acquired	1058.3% (price as of 2026-08-20)
May 26, 2022	PRDO	A	9,050	—	—	44,561 Direct	+25.49%	Acquired	(price as of 2026-08-20)
March 2, 2022	PRDO	M	8,000	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
March 2, 2022	PRDO	S	8,000	$10.70	$85,600	35,511 Direct	-18.39%	Disposed	205.3% (price as of 2026-08-20)
March 2, 2022	PRDO	M	8,000	$6.51	$52,080	43,511 Direct	+22.53%	Acquired	401.8% (price as of 2026-08-20)
March 1, 2022	PRDO	M	8,000	—	—	8,000 Direct	-50.00%	Disposed	(price as of 2026-08-20)
March 1, 2022	PRDO	S	8,000	$10.45	$83,600	35,511 Direct	-18.39%	Disposed	212.6% (price as of 2026-08-20)
March 1, 2022	PRDO	M	8,000	$6.51	$52,080	43,511 Direct	+22.53%	Acquired	401.8% (price as of 2026-08-20)
June 3, 2021	PRDO	A	8,348	—	—	35,511 Direct	+30.73%	Acquired	(price as of 2026-08-20)
March 3, 2021	PRDO	S	20,835	$11.92	$248,353	27,163 Direct	-43.41%	Disposed	174.0% (price as of 2026-08-20)
May 28, 2020	PRDO	A	7,535	—	—	47,998 Direct	+18.62%	Acquired	(price as of 2026-08-20)
Aug. 12, 2019	PRDO	A	5,994	—	—	5,994 Direct	—	Acquired	(price as of 2026-08-20)
Aug. 22, 2018	PRDO	M	24,000	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
Aug. 22, 2018	PRDO	S	21,828	$16.46	$359,289	40,463 Direct	-35.04%	Disposed	98.5% (price as of 2026-08-20)
Aug. 22, 2018	PRDO	M	24,000	$14.96	$359,040	62,291 Direct	+62.68%	Acquired	118.3% (price as of 2026-08-20)
May 31, 2018	PRDO	A	8,017	—	—	8,017 Direct	—	Acquired	(price as of 2026-08-20)
Aug. 14, 2017	PRDO	P	7,425	$8.79	$65,266	38,291 Direct	+24.06%	Acquired	271.6% (price as of 2026-08-20)
Aug. 14, 2017	PRDO	P	2,575	$8.76	$22,557	30,866 Direct	+9.10%	Acquired	272.9% (price as of 2026-08-20)
May 23, 2017	PRDO	A	11,271	—	—	11,271 Direct	—	Acquired	(price as of 2026-08-20)
May 24, 2016	PRDO	A	21,129	—	—	21,129 Direct	—	Acquired	(price as of 2026-08-20)
May 19, 2015	PRDO	A	26,664	—	—	26,664 Direct	—	Acquired	(price as of 2026-08-20)
June 3, 2014	PRDO	A	14,619	—	—	28,291 Direct	+106.93%	Acquired	(price as of 2026-08-20)
May 14, 2013	PRDO	A	16,000	—	—	16,000 Direct	—	Acquired	(price as of 2026-08-20)
May 17, 2012	PRDO	A	16,000	—	—	16,000 Direct	—	Acquired	(price as of 2026-08-20)
May 19, 2011	PRDO	A	16,000	—	—	16,000 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.

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
Aug. 11, 2026	PRDO	Non-Qualified Option (right to buy)	Common Stock (11,271)	$9.69	May 23, 2027	11,271	Disposed
Aug. 6, 2024	PRDO	Non-Qualified Option (right to buy)	Common Stock (26,664)	$3.93	May 19, 2025	26,664	Disposed
March 2, 2023	PRDO	Non-Qualified Option (right to buy)	Common Stock (4,174)	$2.82	May 13, 2023	4,174	Disposed
March 1, 2023	PRDO	Non-Qualified Option (right to buy)	Common Stock (11,826)	$2.82	May 13, 2023	11,826	Disposed
March 2, 2022	PRDO	Non-Qualified Option (right to buy)	Common Stock (8,000)	$6.51	May 16, 2022	8,000	Disposed
March 1, 2022	PRDO	Non-Qualified Option (right to buy)	Common Stock (8,000)	$6.51	May 16, 2022	8,000	Disposed
Aug. 12, 2019	PRDO	Non-Qualified Stock Option (right to buy)	Common Stock (5,994)	$21.29	Aug. 12, 2029	5,994	Acquired
Aug. 22, 2018	PRDO	Non-Qualified Option (right to buy)	Common Stock (24,000)	$14.96	Nov. 16, 2018	24,000	Disposed
May 31, 2018	PRDO	Non-Qualified Stock Option (right to buy)	Common Stock (8,017)	$15.39	May 31, 2028	8,017	Acquired
May 23, 2017	PRDO	Non-Qualified Stock Option (right to buy)	Common Stock (11,271)	$9.69	May 23, 2027	11,271	Acquired
May 24, 2016	PRDO	Non-Qualified Stock Option (Right to buy)	Common Stock (21,129)	$5.96	May 24, 2026	21,129	Acquired
May 19, 2015	PRDO	Non-Qualified Stock Option (Right to buy)	Common Stock (26,664)	$3.93	May 19, 2025	26,664	Acquired
May 14, 2013	PRDO	Non-Qualified Stock Option (right to buy)	Common Stock (16,000)	$2.82	May 13, 2023	16,000	Acquired
May 17, 2012	PRDO	Non-Qualified Stock Option (right to buy)	Common Stock (16,000)	$6.51	May 16, 2022	16,000	Acquired
May 19, 2011	PRDO	Non-Qualified Stock Option (right to buy)	Common Stock (16,000)	$22.13	May 18, 2021	16,000	Acquired

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