Mark G. Bouldin

Insider

First SEC filing: March 15, 2016 · Latest: March 15, 2016

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

Insider at

CLH selling June 4, 2018

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 4, 2018	CLH	S	433	$53.25	$23,057	13,839 Direct	-3.03%	Disposed	510.7% (price as of 2026-08-20)
June 1, 2018	CLH	F	140	$53.69	$7,517	14,272 Direct	-0.97%	Disposed	505.7% (price as of 2026-08-20)
May 7, 2018	CLH	S	2,519	$51.40	$129,477	14,412 Direct	-14.88%	Disposed	532.7% (price as of 2026-08-20)
April 6, 2018	CLH	F	244	$48.38	$11,805	16,931 Direct	-1.42%	Disposed	572.2% (price as of 2026-08-20)
April 2, 2018	CLH	F	528	$48.81	$25,772	17,175 Direct	-2.98%	Disposed	566.3% (price as of 2026-08-20)
March 15, 2018	CLH	F	41	$49.98	$2,049	17,703 Direct	-0.23%	Disposed	550.7% (price as of 2026-08-20)
March 2, 2018	CLH	S	703	$47.62	$33,477	17,744 Direct	-3.81%	Disposed	582.9% (price as of 2026-08-20)
March 1, 2018	CLH	F	297	$48.06	$14,274	18,447 Direct	-1.58%	Disposed	576.7% (price as of 2026-08-20)
Feb. 28, 2018	CLH	F	1,493	—	—	18,744 Direct	-7.38%	Disposed	(price as of 2026-08-20)
Dec. 20, 2017	CLH	S	325	$52.62	$17,102	20,237 Direct	-1.58%	Disposed	518.0% (price as of 2026-08-20)
Dec. 15, 2017	CLH	F	125	$52.17	$6,521	20,562 Direct	-0.60%	Disposed	523.3% (price as of 2026-08-20)
July 1, 2017	CLH	A	905	—	—	20,687 Direct	+4.57%	Acquired	(price as of 2026-08-20)
July 1, 2017	CLH	A	2,111	—	—	19,782 Direct	+11.95%	Acquired	(price as of 2026-08-20)
June 1, 2017	CLH	F	98	$59.25	$5,806	17,671 Direct	-0.55%	Disposed	448.9% (price as of 2026-08-20)
April 7, 2017	CLH	F	137	$56.56	$7,749	17,769 Direct	-0.77%	Disposed	475.0% (price as of 2026-08-20)
April 1, 2017	CLH	A	1,500	—	—	18,362 Direct	+8.90%	Acquired	(price as of 2026-08-20)
March 31, 2017	CLH	F	456	$55.62	$25,363	17,906 Direct	-2.48%	Disposed	484.7% (price as of 2026-08-20)
March 16, 2017	CLH	F	121	$55.74	$6,745	16,862 Direct	-0.71%	Disposed	483.4% (price as of 2026-08-20)
March 8, 2017	CLH	D	1,413	—	—	16,983 Direct	-7.68%	Disposed	(price as of 2026-08-20)
March 3, 2017	CLH	F	327	$58.33	$19,074	18,396 Direct	-1.75%	Disposed	457.5% (price as of 2026-08-20)
March 2, 2017	CLH	S	60	$57.79	$3,467	18,723 Direct	-0.32%	Disposed	462.7% (price as of 2026-08-20)
Dec. 15, 2016	CLH	F	22	$57.13	$1,257	18,783 Direct	-0.12%	Disposed	469.2% (price as of 2026-08-20)
June 7, 2016	CLH	A	2,491	—	—	18,805 Direct	+15.27%	Acquired	(price as of 2026-08-20)
June 7, 2016	CLH	A	1,067	—	—	16,314 Direct	+7.00%	Acquired	(price as of 2026-08-20)
May 10, 2016	CLH	S	367	$47.50	$17,432	15,247 Direct	-2.35%	Disposed	584.6% (price as of 2026-08-20)
April 7, 2016	CLH	F	133	$47.20	$6,278	15,614 Direct	-0.84%	Disposed	589.0% (price as of 2026-08-20)
April 1, 2016	CLH	A	5,000	—	—	15,747 Direct	+46.52%	Acquired	(price as of 2026-08-20)
March 15, 2016	CLH	F	28	$45.77	$1,282	10,747 Direct	-0.26%	Disposed	610.5% (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.

Initial ownership (Form 3) 1 holding

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

Date	Ticker	Security	Shares	Ownership
March 15, 2016	CLH	Common Stock	10,775	Direct