Larry Shelton

Insider

First SEC filing: July 31, 2006 · Latest: July 31, 2006

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.
Initial holdings The stakes this person held when they first started reporting.

Insider at

PESI buying May 22, 2013

Insider transactions

0 buys (P) 0 sells (S) Net: $0 + 59 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

59 other filings hidden

Date	Ticker	Code	Shares	Price	Value	Owned after	Δ own	A/D	vs now
July 22, 2026	PESI	A	10,000	—	—	10,000 Direct	—	Acquired	(price as of 2026-08-20)
July 13, 2026	PESI	M	2,400	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
July 13, 2026	PESI	M	2,400	$4.60	$11,040	198,983 Direct	+1.22%	Acquired	268.2% (price as of 2026-08-20)
July 1, 2026	PESI	A	1,365	$10.72	$14,633	196,583 Direct	+0.70%	Acquired	58.0% (price as of 2026-08-20)
July 27, 2017	PESI	A	2,400	$3.55	$8,520	2,400 Direct	—	Acquired	377.1% (price as of 2026-08-20)
July 3, 2017	PESI	A	4,037	$2.74	$11,061	80,141 Direct	+5.30%	Acquired	518.2% (price as of 2026-08-20)
April 3, 2017	PESI	A	4,540	$2.36	$10,714	76,104 Direct	+6.34%	Acquired	617.7% (price as of 2026-08-20)
Jan. 3, 2017	PESI	A	3,667	$2.92	$10,708	71,564 Direct	+5.40%	Acquired	480.1% (price as of 2026-08-20)
Oct. 3, 2016	PESI	A	2,856	$3.76	$10,739	67,897 Direct	+4.39%	Acquired	350.5% (price as of 2026-08-20)
July 28, 2016	PESI	A	2,400	$4.60	$11,040	2,400 Direct	—	Acquired	268.2% (price as of 2026-08-20)
July 1, 2016	PESI	A	2,980	$3.82	$11,384	65,041 Direct	+4.80%	Acquired	343.4% (price as of 2026-08-20)
April 1, 2016	PESI	A	3,982	$2.78	$11,070	62,061 Direct	+6.86%	Acquired	509.3% (price as of 2026-08-20)
Jan. 4, 2016	PESI	A	3,611	$2.79	$10,075	58,079 Direct	+6.63%	Acquired	507.1% (price as of 2026-08-20)
Oct. 1, 2015	PESI	A	3,763	$3.02	$11,364	54,468 Direct	+7.42%	Acquired	460.9% (price as of 2026-08-20)
Sept. 17, 2015	PESI	A	2,400	—	—	2,400 Direct	—	Acquired	(price as of 2026-08-20)
July 1, 2015	PESI	A	3,867	$2.86	$11,060	50,705 Direct	+8.26%	Acquired	492.2% (price as of 2026-08-20)
April 1, 2015	PESI	A	3,686	$2.91	$10,726	46,838 Direct	+8.54%	Acquired	482.1% (price as of 2026-08-20)
Jan. 2, 2015	PESI	A	2,252	$3.26	$7,342	43,152 Direct	+5.51%	Acquired	419.6% (price as of 2026-08-20)
Oct. 1, 2014	PESI	A	2,382	$2.86	$6,813	40,900 Direct	+6.18%	Acquired	492.2% (price as of 2026-08-20)
Sept. 18, 2014	PESI	A	2,400	$3.70	$8,880	2,400 Direct	—	Acquired	357.8% (price as of 2026-08-20)
July 1, 2014	PESI	A	1,884	$3.45	$6,500	38,518 Direct	+5.14%	Acquired	391.0% (price as of 2026-08-20)
April 1, 2014	PESI	A	1,598	$3.66	$5,849	36,634 Direct	+4.56%	Acquired	362.8% (price as of 2026-08-20)
Jan. 2, 2014	PESI	A	2,647	$2.33	$6,168	35,036 Direct	+8.17%	Acquired	627.0% (price as of 2026-08-20)
Oct. 1, 2013	PESI	A	11,824	$0.55	$6,503	161,946 Direct	+7.88%	Acquired	515.9% (price as of 2026-08-20)
Sept. 12, 2013	PESI	A	12,000	$0.56	$6,720	12,000 Direct	—	Acquired	504.9% (price as of 2026-08-20)
July 1, 2013	PESI	A	22,870	$0.27	$6,175	150,122 Direct	+17.97%	Acquired	1154.7% (price as of 2026-08-20)
May 22, 2013	PESI	P	380	$0.65	$247	125,632 Direct	+0.30%	Acquired	421.2% (price as of 2026-08-20)
May 22, 2013	PESI	P	100	$0.67	$67	125,732 Direct	+0.08%	Acquired	405.6% (price as of 2026-08-20)
May 22, 2013	PESI	P	100	$0.67	$67	125,832 Direct	+0.08%	Acquired	405.6% (price as of 2026-08-20)
May 22, 2013	PESI	P	264	$0.68	$180	126,096 Direct	+0.21%	Acquired	398.2% (price as of 2026-08-20)
May 22, 2013	PESI	P	656	$0.70	$459	126,752 Direct	+0.52%	Acquired	384.0% (price as of 2026-08-20)
May 22, 2013	PESI	P	100	$0.69	$69	126,852 Direct	+0.08%	Acquired	391.0% (price as of 2026-08-20)
May 22, 2013	PESI	P	400	$0.69	$276	127,252 Direct	+0.32%	Acquired	391.0% (price as of 2026-08-20)
April 1, 2013	PESI	A	10,039	$0.62	$6,224	125,252 Direct	+8.71%	Acquired	446.4% (price as of 2026-08-20)
Jan. 2, 2013	PESI	A	12,088	$0.51	$6,165	115,213 Direct	+11.72%	Acquired	564.2% (price as of 2026-08-20)
Oct. 1, 2012	PESI	A	8,750	$0.78	$6,825	103,125 Direct	+9.27%	Acquired	334.3% (price as of 2026-08-20)
Sept. 13, 2012	PESI	A	12,000	$1.10	$13,200	12,000 Direct	—	Acquired	208.0% (price as of 2026-08-20)
July 2, 2012	PESI	A	6,296	$0.88	$5,540	94,375 Direct	+7.15%	Acquired	285.0% (price as of 2026-08-20)
May 25, 2012	PESI	P	800	$1.20	$960	83,879 Direct	+0.96%	Acquired	182.3% (price as of 2026-08-20)
May 25, 2012	PESI	P	4,200	$1.20	$5,040	88,079 Direct	+5.01%	Acquired	182.3% (price as of 2026-08-20)
April 2, 2012	PESI	A	4,361	$1.19	$5,190	89,079 Direct	+5.15%	Acquired	184.7% (price as of 2026-08-20)
Jan. 3, 2012	PESI	A	4,473	$1.16	$5,189	78,718 Direct	+6.02%	Acquired	192.0% (price as of 2026-08-20)
Oct. 1, 2011	PESI	A	5,778	$0.90	$5,200	74,245 Direct	+8.44%	Acquired	276.4% (price as of 2026-08-20)
Aug. 24, 2011	PESI	A	12,000	$1.41	$16,920	12,000 Direct	—	Acquired	140.3% (price as of 2026-08-20)
July 1, 2011	PESI	A	4,676	$1.04	$4,863	68,467 Direct	+7.33%	Acquired	225.7% (price as of 2026-08-20)
April 1, 2011	PESI	A	4,879	$1.13	$5,513	63,791 Direct	+8.28%	Acquired	199.8% (price as of 2026-08-20)
Jan. 4, 2011	PESI	A	4,254	$1.22	$5,190	58,912 Direct	+7.78%	Acquired	177.7% (price as of 2026-08-20)
Oct. 1, 2010	PESI	A	4,930	$1.25	$6,162	54,658 Direct	+9.91%	Acquired	171.0% (price as of 2026-08-20)
Sept. 29, 2010	PESI	A	12,000	$1.68	$20,160	12,000 Direct	—	Acquired	101.6% (price as of 2026-08-20)
July 1, 2010	PESI	A	4,576	$1.21	$5,537	49,728 Direct	+10.13%	Acquired	180.0% (price as of 2026-08-20)
April 1, 2010	PESI	A	3,095	$1.68	$5,200	45,152 Direct	+7.36%	Acquired	101.6% (price as of 2026-08-20)
Jan. 4, 2010	PESI	A	2,863	$1.70	$4,867	42,057 Direct	+7.30%	Acquired	99.3% (price as of 2026-08-20)
Oct. 1, 2009	PESI	A	2,963	$1.76	$5,215	39,194 Direct	+8.18%	Acquired	92.5% (price as of 2026-08-20)
July 29, 2009	PESI	A	12,000	$2.67	$32,040	12,000 Direct	—	Acquired	26.9% (price as of 2026-08-20)
July 1, 2009	PESI	A	2,686	$1.82	$4,889	36,231 Direct	+8.01%	Acquired	86.1% (price as of 2026-08-20)
April 1, 2009	PESI	A	3,778	$1.46	$5,516	33,545 Direct	+12.69%	Acquired	132.0% (price as of 2026-08-20)
Jan. 2, 2009	PESI	A	5,547	$0.94	$5,214	29,767 Direct	+22.90%	Acquired	260.4% (price as of 2026-08-20)
Nov. 14, 2008	PESI	P	200	$1.29	$258	22,420 Direct	+0.90%	Acquired	162.6% (price as of 2026-08-20)
Nov. 14, 2008	PESI	P	1,400	$1.30	$1,820	23,820 Direct	+6.24%	Acquired	160.6% (price as of 2026-08-20)
Nov. 14, 2008	PESI	P	400	$1.30	$520	24,220 Direct	+1.68%	Acquired	160.6% (price as of 2026-08-20)
Oct. 1, 2008	PESI	A	2,799	$1.57	$4,394	22,220 Direct	+14.41%	Acquired	115.8% (price as of 2026-08-20)
Sept. 4, 2008	PESI	P	1,000	$2.38	$2,380	19,421 Direct	+5.43%	Acquired	42.3% (price as of 2026-08-20)
Aug. 5, 2008	PESI	A	2,021	$2.01	$4,062	10,418 Direct	+24.07%	Acquired	68.5% (price as of 2026-08-20)
Aug. 5, 2008	PESI	A	2,368	$1.85	$4,381	12,786 Direct	+22.73%	Acquired	83.1% (price as of 2026-08-20)
Aug. 5, 2008	PESI	A	3,611	$1.22	$4,405	16,397 Direct	+28.24%	Acquired	177.7% (price as of 2026-08-20)
Aug. 5, 2008	PESI	A	2,024	$2.17	$4,392	18,421 Direct	+12.34%	Acquired	56.1% (price as of 2026-08-20)
Aug. 5, 2008	PESI	A	12,000	$2.34	$28,080	12,000 Direct	—	Acquired	44.8% (price as of 2026-08-20)
May 14, 2008	PESI	P	1,000	$2.35	$2,350	8,397 Direct	+13.52%	Acquired	44.2% (price as of 2026-08-20)
Aug. 2, 2007	PESI	A	1,352	$1.55	$2,096	1,352 Direct	—	Acquired	118.6% (price as of 2026-08-20)
Aug. 2, 2007	PESI	A	1,681	$1.74	$2,925	3,033 Direct	+124.33%	Acquired	94.7% (price as of 2026-08-20)
Aug. 2, 2007	PESI	A	2,458	$1.78	$4,375	5,491 Direct	+81.04%	Acquired	90.3% (price as of 2026-08-20)
Aug. 2, 2007	PESI	A	1,906	$2.30	$4,384	7,397 Direct	+34.71%	Acquired	47.3% (price as of 2026-08-20)
Aug. 2, 2007	PESI	A	12,000	$2.95	$35,400	12,000 Direct	—	Acquired	14.8% (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
July 22, 2026	PESI	Stock Option (Right to Buy)	Common Stock (10,000)	$16.64	July 22, 2036	10,000	Acquired
July 13, 2026	PESI	Stock Option (Right to Buy)	Common Stock (2,400)	$4.60	July 28, 2026	2,400	Disposed
July 27, 2017	PESI	Stock Option	Common Stock (2,400)	$3.55	July 27, 2027	2,400	Acquired
July 28, 2016	PESI	Stock Option	Common Stock (2,400)	$4.60	July 28, 2026	2,400	Acquired
Sept. 17, 2015	PESI	Stock Option	Common Stock (2,400)	$4.19	Sept. 17, 2025	2,400	Acquired
Sept. 18, 2014	PESI	Stock Option	Common Stock (2,400)	$3.70	Sept. 18, 2024	2,400	Acquired
Sept. 12, 2013	PESI	Stock Option	Common Stock (12,000)	$0.56	Sept. 12, 2023	12,000	Acquired
Sept. 13, 2012	PESI	Stock Option	Common Stock (12,000)	$1.10	Sept. 13, 2022	12,000	Acquired
Aug. 24, 2011	PESI	Stock Option	Common Stock (12,000)	$1.41	Aug. 24, 2021	12,000	Acquired
Sept. 29, 2010	PESI	Stock Option	Common Stock (12,000)	$1.68	Sept. 29, 2020	12,000	Acquired
July 29, 2009	PESI	Stock Option	Common Stock (12,000)	$2.67	July 29, 2019	12,000	Acquired
Aug. 5, 2008	PESI	Stock Option	Common Stock (12,000)	$2.34	Aug. 5, 2018	12,000	Acquired
Aug. 2, 2007	PESI	Stock Option	Common Stock (12,000)	$2.95	Aug. 2, 2017	12,000	Acquired

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
July 31, 2006	PESI	Stock Option→ Common Stock (30,000)	30,000	Direct