John L Stanfill

Insider

First SEC filing: June 26, 2008 · Latest: June 26, 2008

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.
Compensation Executive pay disclosed in company proxy statements.

Insider at

CSGP selling March 11, 2014

Insider transactions

0 buys (P) 0 sells (S) Net: $0 + 74 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

74 other filings hidden

Date	Ticker	Code	Shares	Price	Value	Owned after	Δ own	A/D	vs now
March 11, 2014	CSGP	M	3,867	—	—	3,867 Direct	-50.00%	Disposed	(price as of 2026-08-20)
March 11, 2014	CSGP	M	1,922	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
March 11, 2014	CSGP	F	1,018	$207.81	$211,551	14,316 Direct	-6.64%	Disposed	61.1% (price as of 2026-08-20)
March 11, 2014	CSGP	S	5,789	$207.60	$1,201,796	15,334 Direct	-27.41%	Disposed	61.2% (price as of 2026-08-20)
March 11, 2014	CSGP	M	3,867	$58.95	$227,960	21,123 Direct	+22.41%	Acquired	467.8% (price as of 2026-08-20)
March 11, 2014	CSGP	M	1,922	$57.16	$109,862	17,256 Direct	+12.53%	Acquired	485.5% (price as of 2026-08-20)
March 10, 2014	CSGP	M	1,978	—	—	1,922 Direct	-50.72%	Disposed	(price as of 2026-08-20)
March 10, 2014	CSGP	S	20,126	$208.82	$4,202,711	15,334 Direct	-56.76%	Disposed	60.3% (price as of 2026-08-20)
March 10, 2014	CSGP	M	1,978	$57.16	$113,062	35,460 Direct	+5.91%	Acquired	485.5% (price as of 2026-08-20)
March 4, 2014	CSGP	F	831	$214.00	$177,834	33,482 Direct	-2.42%	Disposed	56.4% (price as of 2026-08-20)
Feb. 28, 2014	CSGP	A	7,800	—	—	7,800 Direct	—	Acquired	(price as of 2026-08-20)
Feb. 28, 2014	CSGP	A	5,760	—	—	34,313 Direct	+20.17%	Acquired	(price as of 2026-08-20)
Feb. 28, 2014	CSGP	F	15,254	$201.04	$3,066,664	28,553 Direct	-34.82%	Disposed	66.5% (price as of 2026-08-20)
Feb. 21, 2014	CSGP	F	1,006	$197.97	$199,158	43,807 Direct	-2.24%	Disposed	69.1% (price as of 2026-08-20)
Nov. 12, 2013	CSGP	S	548	$171.73	$94,108	44,813 Direct	-1.21%	Disposed	94.9% (price as of 2026-08-20)
March 12, 2013	CSGP	M	2,300	$42.29	$97,267	52,484 Direct	+4.58%	Acquired	691.4% (price as of 2026-08-20)
March 12, 2013	CSGP	M	3,900	$57.16	$222,924	56,384 Direct	+7.43%	Acquired	485.5% (price as of 2026-08-20)
March 12, 2013	CSGP	M	196	$39.53	$7,748	56,580 Direct	+0.35%	Acquired	746.7% (price as of 2026-08-20)
March 12, 2013	CSGP	M	3,866	$58.95	$227,901	60,446 Direct	+6.83%	Acquired	467.8% (price as of 2026-08-20)
March 12, 2013	CSGP	S	14,599	$101.10	$1,475,959	45,847 Direct	-24.15%	Disposed	231.1% (price as of 2026-08-20)
March 12, 2013	CSGP	F	486	$101.06	$49,115	45,361 Direct	-1.06%	Disposed	231.2% (price as of 2026-08-20)
March 12, 2013	CSGP	M	2,300	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
March 12, 2013	CSGP	M	3,900	—	—	3,900 Direct	-50.00%	Disposed	(price as of 2026-08-20)
March 12, 2013	CSGP	M	196	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
March 12, 2013	CSGP	M	3,866	—	—	7,734 Direct	-33.33%	Disposed	(price as of 2026-08-20)
March 11, 2013	CSGP	A	6,000	—	—	50,184 Direct	+13.58%	Acquired	(price as of 2026-08-20)
March 11, 2013	CSGP	A	10,100	—	—	10,100 Direct	—	Acquired	(price as of 2026-08-20)
March 4, 2013	CSGP	F	562	$103.17	$57,982	44,184 Direct	-1.26%	Disposed	224.4% (price as of 2026-08-20)
Feb. 21, 2013	CSGP	F	947	$95.90	$90,817	44,746 Direct	-2.07%	Disposed	249.0% (price as of 2026-08-20)
Sept. 6, 2012	CSGP	M	15,000	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
Sept. 6, 2012	CSGP	S	34,530	$81.84	$2,825,935	45,693 Direct	-43.04%	Disposed	309.0% (price as of 2026-08-20)
Sept. 6, 2012	CSGP	M	15,000	$55.07	$826,050	80,223 Direct	+23.00%	Acquired	507.8% (price as of 2026-08-20)
Sept. 4, 2012	CSGP	F	15,470	$82.45	$1,275,502	65,223 Direct	-19.17%	Disposed	305.9% (price as of 2026-08-20)
May 7, 2012	CSGP	M	3,900	—	—	7,800 Direct	-33.33%	Disposed	(price as of 2026-08-20)
May 7, 2012	CSGP	M	4,600	—	—	2,300 Direct	-66.67%	Disposed	(price as of 2026-08-20)
May 7, 2012	CSGP	M	2,602	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
May 7, 2012	CSGP	M	750	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
May 7, 2012	CSGP	S	11,852	$70.13	$831,181	80,693 Direct	-12.81%	Disposed	377.3% (price as of 2026-08-20)
May 7, 2012	CSGP	M	3,900	$57.16	$222,924	92,545 Direct	+4.40%	Acquired	485.5% (price as of 2026-08-20)
May 7, 2012	CSGP	M	4,600	$42.29	$194,534	88,645 Direct	+5.47%	Acquired	691.4% (price as of 2026-08-20)
May 7, 2012	CSGP	M	2,602	$25.00	$65,050	84,045 Direct	+3.19%	Acquired	1238.8% (price as of 2026-08-20)
May 7, 2012	CSGP	M	750	$19.71	$14,782	81,443 Direct	+0.93%	Acquired	1598.1% (price as of 2026-08-20)
May 4, 2012	CSGP	S	8,000	$70.57	$564,560	80,693 Direct	-9.02%	Disposed	374.3% (price as of 2026-08-20)
March 12, 2012	CSGP	F	353	$63.12	$22,281	88,693 Direct	-0.40%	Disposed	430.3% (price as of 2026-08-20)
March 4, 2012	CSGP	F	558	$58.92	$32,877	89,046 Direct	-0.62%	Disposed	468.1% (price as of 2026-08-20)
March 2, 2012	CSGP	F	330	$58.92	$19,444	89,604 Direct	-0.37%	Disposed	468.1% (price as of 2026-08-20)
Feb. 21, 2012	CSGP	A	11,600	—	—	11,600 Direct	—	Acquired	(price as of 2026-08-20)
Feb. 21, 2012	CSGP	A	38,800	—	—	89,934 Direct	+75.88%	Acquired	(price as of 2026-08-20)
Feb. 13, 2012	CSGP	F	855	$58.76	$50,240	51,134 Direct	-1.64%	Disposed	469.6% (price as of 2026-08-20)
Dec. 6, 2011	CSGP	F	85	$66.49	$5,652	51,989 Direct	-0.16%	Disposed	403.4% (price as of 2026-08-20)
May 2, 2011	CSGP	M	5,198	—	—	2,602 Direct	-66.64%	Disposed	(price as of 2026-08-20)
May 2, 2011	CSGP	M	4,804	—	—	196 Direct	-96.08%	Disposed	(price as of 2026-08-20)
May 2, 2011	CSGP	M	1,000	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
May 2, 2011	CSGP	S	5,198	$68.17	$354,348	52,074 Direct	-9.08%	Disposed	391.0% (price as of 2026-08-20)
May 2, 2011	CSGP	S	5,804	$68.30	$396,413	57,272 Direct	-9.20%	Disposed	390.0% (price as of 2026-08-20)
May 2, 2011	CSGP	M	5,198	$25.00	$129,950	63,076 Direct	+8.98%	Acquired	1238.8% (price as of 2026-08-20)
May 2, 2011	CSGP	M	4,804	$39.53	$189,902	57,878 Direct	+9.05%	Acquired	746.7% (price as of 2026-08-20)
May 2, 2011	CSGP	M	1,000	$30.06	$30,060	53,074 Direct	+1.92%	Acquired	1013.4% (price as of 2026-08-20)
March 12, 2011	CSGP	F	345	$56.21	$19,392	52,074 Direct	-0.66%	Disposed	495.4% (price as of 2026-08-20)
March 4, 2011	CSGP	A	4,900	—	—	52,419 Direct	+10.31%	Acquired	(price as of 2026-08-20)
March 4, 2011	CSGP	A	11,700	—	—	11,700 Direct	—	Acquired	(price as of 2026-08-20)
March 2, 2011	CSGP	F	323	$56.31	$18,188	47,519 Direct	-0.68%	Disposed	494.4% (price as of 2026-08-20)
Feb. 13, 2011	CSGP	F	845	$59.06	$49,906	47,842 Direct	-1.74%	Disposed	466.7% (price as of 2026-08-20)
Dec. 12, 2010	CSGP	F	167	$55.84	$9,325	48,687 Direct	-0.34%	Disposed	499.4% (price as of 2026-08-20)
Dec. 6, 2010	CSGP	F	83	$55.37	$4,596	48,854 Direct	-0.17%	Disposed	504.5% (price as of 2026-08-20)
Oct. 25, 2010	CSGP	S	3,167	$50.41	$159,648	48,937 Direct	-6.08%	Disposed	564.0% (price as of 2026-08-20)
Sept. 7, 2010	CSGP	F	69	$42.78	$2,952	52,104 Direct	-0.13%	Disposed	682.4% (price as of 2026-08-20)
June 20, 2010	CSGP	A	37	—	—	52,173 Direct	+0.07%	Acquired	(price as of 2026-08-20)
March 12, 2010	CSGP	A	6,900	—	—	6,900 Direct	—	Acquired	(price as of 2026-08-20)
March 12, 2010	CSGP	A	3,100	—	—	52,136 Direct	+6.32%	Acquired	(price as of 2026-08-20)
March 2, 2010	CSGP	F	323	$39.36	$12,713	49,036 Direct	-0.65%	Disposed	750.4% (price as of 2026-08-20)
Feb. 13, 2010	CSGP	F	961	$39.02	$37,498	49,359 Direct	-1.91%	Disposed	757.8% (price as of 2026-08-20)
Dec. 12, 2009	CSGP	F	167	$40.00	$6,680	50,320 Direct	-0.33%	Disposed	736.8% (price as of 2026-08-20)
Dec. 6, 2009	CSGP	F	83	$42.15	$3,498	50,487 Direct	-0.16%	Disposed	694.1% (price as of 2026-08-20)
Sept. 8, 2009	CSGP	F	59	$37.69	$2,224	50,570 Direct	-0.12%	Disposed	788.0% (price as of 2026-08-20)
Sept. 7, 2009	CSGP	F	69	$37.00	$2,553	50,629 Direct	-0.14%	Disposed	804.6% (price as of 2026-08-20)
March 2, 2009	CSGP	A	2,900	—	—	50,698 Direct	+6.07%	Acquired	(price as of 2026-08-20)
March 2, 2009	CSGP	A	7,800	—	—	7,800 Direct	—	Acquired	(price as of 2026-08-20)
Feb. 13, 2009	CSGP	F	991	$29.55	$29,284	47,798 Direct	-2.03%	Disposed	1032.7% (price as of 2026-08-20)
Dec. 12, 2008	CSGP	F	167	$30.81	$5,145	48,789 Direct	-0.34%	Disposed	986.3% (price as of 2026-08-20)
Dec. 6, 2008	CSGP	F	83	$29.25	$2,428	48,956 Direct	-0.17%	Disposed	1044.3% (price as of 2026-08-20)
Sept. 8, 2008	CSGP	F	119	$52.93	$6,299	49,039 Direct	-0.24%	Disposed	532.3% (price as of 2026-08-20)
Sept. 4, 2008	CSGP	A	15,000	—	—	15,000 Direct	—	Acquired	(price as of 2026-08-20)
Sept. 4, 2008	CSGP	A	35,000	—	—	49,158 Direct	+247.21%	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
March 11, 2014	CSGP	Option to Acquire Common Stock	Common Stock (3,867)	$58.95	Feb. 20, 2022	3,867	Disposed
March 11, 2014	CSGP	Option to Acquire Common Stock	Common Stock (1,922)	$57.16	March 3, 2021	1,922	Disposed
March 10, 2014	CSGP	Option to Acquire Common Stock	Common Stock (1,978)	$57.16	March 3, 2021	1,978	Disposed
Feb. 28, 2014	CSGP	Option to Acquire Common Stock	Common Stock (7,800)	$201.04	Feb. 27, 2024	7,800	Acquired
March 12, 2013	CSGP	Option to Acquire Common Stock	Common Stock (2,300)	$42.29	March 11, 2020	2,300	Disposed
March 12, 2013	CSGP	Option to Acquire Common Stock	Common Stock (3,900)	$57.16	March 3, 2021	3,900	Disposed
March 12, 2013	CSGP	Option to Acquire Common Stock	Common Stock (196)	$39.53	May 4, 2014	196	Disposed
March 12, 2013	CSGP	Option to Acquire Common Stock	Common Stock (3,866)	$58.95	Feb. 20, 2022	3,866	Disposed
March 11, 2013	CSGP	Option to Acquire Common Stock	Common Stock (10,100)	$102.16	March 10, 2023	10,100	Acquired
Sept. 6, 2012	CSGP	Option to Acquire Common Stock	Common Stock (15,000)	$55.07	Sept. 3, 2018	15,000	Disposed
May 7, 2012	CSGP	Option to Acquire Common Stock	Common Stock (3,900)	$57.16	March 3, 2021	3,900	Disposed
May 7, 2012	CSGP	Option to Acquire Common Stock	Common Stock (4,600)	$42.29	March 11, 2020	4,600	Disposed
May 7, 2012	CSGP	Option to Acquire Common Stock	Common Stock (2,602)	$25.00	March 1, 2019	2,602	Disposed
May 7, 2012	CSGP	Option to Acquire Common Stock	Common Stock (750)	$19.71	Aug. 5, 2012	750	Disposed
Feb. 21, 2012	CSGP	Option to Acquire Common Stock	Common Stock (11,600)	$58.95	Feb. 20, 2022	11,600	Acquired
May 2, 2011	CSGP	Option to Acquire Common Stock	Common Stock (5,198)	$25.00	March 1, 2019	5,198	Disposed
May 2, 2011	CSGP	Option to Acquire Common Stock	Common Stock (4,804)	$39.53	May 4, 2014	4,804	Disposed
May 2, 2011	CSGP	Option to Acquire Common Stock	Common Stock (1,000)	$30.06	Sept. 3, 2013	1,000	Disposed
March 4, 2011	CSGP	Option to Acquire Common Stock	Common Stock (11,700)	$57.16	March 3, 2021	11,700	Acquired
March 12, 2010	CSGP	Option to Acquire Common Stock	Common Stock (6,900)	$42.29	March 11, 2020	6,900	Acquired
March 2, 2009	CSGP	Option to Acquire Common Stock	Common Stock (7,800)	$25.00	March 1, 2019	7,800	Acquired
Sept. 4, 2008	CSGP	Option to Acquire Common Stock	Common Stock (15,000)	$55.07	Sept. 3, 2018	15,000	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
June 26, 2008	CSGP	Common Stock, par value $0.01 per share	—	Direct
June 26, 2008	CSGP	Option to Acquire Common Stock→ Common Stock, par value $0.01 per share (750)	750	Direct
June 26, 2008	CSGP	Option to Acquire Common Stock→ Common Stock, par value $0.01 per share (1,000)	1,000	Direct
June 26, 2008	CSGP	Option to Acquire Common Stock→ Common Stock, par value $0.01 per share (5,000)	5,000	Direct

Compensation (DEF 14A)

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

CSGP

Fiscal year	Salary	Bonus	Stock awards	Option awards	Non-equity incentive	Pension change	Other	Total
2014	$199,014	—	—	—	$26,128	—	$12,018	$1,881,233
2013	$331,700	—	—	—	$99,665	—	$17,182	$1,405,917
2012	$319,231	—	—	—	$351,394	—	$29,654	$1,427,153

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