Robert K Ditmore

CIK 1205242 · View on SEC EDGAR ↗

Insider

First SEC filing: Jan. 4, 2022 · Latest: Jan. 4, 2022

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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.

Insider at

CNC buying Feb. 26, 2021

Insider transactions

0 buys (P) 0 sells (S) Net: $0 + 73 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

73 other filings hidden

Date	Ticker	Code	Shares	Price	Value	Owned after	Δ own	A/D	vs now
Dec. 31, 2021	CNC	A	565	—	—	666,486 Direct	+0.08%	Acquired	(price as of 2026-08-19)
Oct. 4, 2021	CNC	G	170	—	—	56,160 Indirect	-0.30%	Disposed	(price as of 2026-08-19)
Sept. 30, 2021	CNC	A	636	$66.82	$42,498	665,922 Direct	+0.10%	Acquired	-2.6% (price as of 2026-08-19)
June 30, 2021	CNC	A	620	$68.51	$42,476	665,286 Direct	+0.09%	Acquired	-5.0% (price as of 2026-08-19)
April 27, 2021	CNC	A	3,300	$66.00	$217,800	664,665 Direct	+0.50%	Acquired	-1.4% (price as of 2026-08-19)
March 31, 2021	CNC	A	686	$61.92	$42,477	661,365 Direct	+0.10%	Acquired	5.1% (price as of 2026-08-19)
Feb. 26, 2021	CNC	P	170	$58.45	$9,936	56,330 Indirect	+0.30%	Acquired	11.3% (price as of 2026-08-19)
Dec. 31, 2020	CNC	A	669	$63.53	$42,502	660,679 Direct	+0.10%	Acquired	2.4% (price as of 2026-08-19)
Nov. 3, 2020	CNC	S 10b5-1	33,334	$65.11	$2,170,377	660,010 Direct	-4.81%	Disposed	-0.1% (price as of 2026-08-19)
Sept. 30, 2020	CNC	A	684	$62.12	$42,490	693,344 Direct	+0.10%	Acquired	4.7% (price as of 2026-08-19)
July 30, 2020	CNC	S 10b5-1	33,333	$65.34	$2,177,978	692,660 Direct	-4.59%	Disposed	-0.4% (price as of 2026-08-19)
June 30, 2020	CNC	A	653	$65.11	$42,517	725,993 Direct	+0.09%	Acquired	-0.1% (price as of 2026-08-19)
June 8, 2020	CNC	S 10b5-1	33,333	$65.31	$2,176,978	725,340 Direct	-4.39%	Disposed	-0.4% (price as of 2026-08-19)
April 28, 2020	CNC	A	3,300	$60.68	$200,244	758,673 Direct	+0.44%	Acquired	7.2% (price as of 2026-08-19)
March 31, 2020	CNC	A	700	$60.68	$42,476	755,373 Direct	+0.09%	Acquired	7.2% (price as of 2026-08-19)
Feb. 6, 2020	CNC	S 10b5-1	30,000	$65.31	$1,959,300	754,673 Direct	-3.82%	Disposed	-0.4% (price as of 2026-08-19)
Dec. 31, 2019	CNC	A	783	$54.25	$42,478	784,673 Direct	+0.10%	Acquired	19.9% (price as of 2026-08-19)
Dec. 17, 2019	CNC	S 10b5-1	30,000	$59.49	$1,784,700	783,889 Direct	-3.69%	Disposed	9.4% (price as of 2026-08-19)
Oct. 30, 2019	CNC	S 10b5-1	10,981	$53.25	$584,738	813,889 Direct	-1.33%	Disposed	22.2% (price as of 2026-08-19)
Oct. 29, 2019	CNC	S 10b5-1	49,019	$50.01	$2,451,440	824,870 Direct	-5.61%	Disposed	30.1% (price as of 2026-08-19)
Sept. 30, 2019	CNC	A	873	$48.70	$42,515	873,889 Direct	+0.10%	Acquired	33.6% (price as of 2026-08-19)
June 30, 2019	CNC	A	787	$54.01	$42,506	873,017 Direct	+0.09%	Acquired	20.4% (price as of 2026-08-19)
April 23, 2019	CNC	A	3,300	$60.70	$200,310	872,230 Direct	+0.38%	Acquired	7.2% (price as of 2026-08-19)
March 31, 2019	CNC	A	700	$60.70	$42,490	868,930 Direct	+0.08%	Acquired	7.2% (price as of 2026-08-19)
Dec. 31, 2018	CNC	A	317	$133.89	$42,443	434,115 Direct	+0.07%	Acquired	-2.8% (price as of 2026-08-19)
Oct. 25, 2018	CNC	S 10b5-1	15,000	$129.24	$1,938,600	433,797 Direct	-3.34%	Disposed	0.7% (price as of 2026-08-19)
Sept. 30, 2018	CNC	A	306	$138.85	$42,488	448,797 Direct	+0.07%	Acquired	-6.3% (price as of 2026-08-19)
Sept. 10, 2018	CNC	S 10b5-1	15,000	$145.06	$2,175,900	448,491 Direct	-3.24%	Disposed	-10.3% (price as of 2026-08-19)
July 26, 2018	CNC	S 10b5-1	8,750	$131.44	$1,150,100	463,491 Direct	-1.85%	Disposed	-1.0% (price as of 2026-08-19)
July 12, 2018	CNC	G	45	—	—	472,241 Direct	-0.01%	Disposed	(price as of 2026-08-19)
June 30, 2018	CNC	A	369	$115.33	$42,557	472,286 Direct	+0.08%	Acquired	12.8% (price as of 2026-08-19)
April 26, 2018	CNC	S 10b5-1	8,750	$108.15	$946,312	471,918 Direct	-1.82%	Disposed	20.3% (price as of 2026-08-19)
April 24, 2018	CNC	A	1,925	$104.27	$200,720	480,668 Direct	+0.40%	Acquired	24.8% (price as of 2026-08-19)
March 31, 2018	CNC	A	408	$104.27	$42,542	478,743 Direct	+0.09%	Acquired	24.8% (price as of 2026-08-19)
Feb. 8, 2018	CNC	S 10b5-1	8,750	$104.13	$911,138	478,335 Direct	-1.80%	Disposed	24.9% (price as of 2026-08-19)
Jan. 8, 2018	CNC	S 10b5-1	8,750	$104.30	$912,625	487,085 Direct	-1.76%	Disposed	24.7% (price as of 2026-08-19)
Dec. 31, 2017	CNC	A	439	$96.88	$42,530	495,835 Direct	+0.09%	Acquired	34.3% (price as of 2026-08-19)
Oct. 26, 2017	CNC	S 10b5-1	4,167	$90.42	$376,780	495,396 Direct	-0.83%	Disposed	43.9% (price as of 2026-08-19)
Sept. 30, 2017	CNC	A	494	$86.10	$42,533	499,563 Direct	+0.10%	Acquired	51.1% (price as of 2026-08-19)
July 27, 2017	CNC	S 10b5-1	4,167	$82.59	$344,153	499,070 Direct	-0.83%	Disposed	57.5% (price as of 2026-08-19)
June 30, 2017	CNC	A	563	$75.49	$42,501	503,237 Direct	+0.11%	Acquired	72.4% (price as of 2026-08-19)
June 2, 2017	CNC	S 10b5-1	3,900	$75.43	$294,177	26,600 Indirect	-12.79%	Disposed	72.5% (price as of 2026-08-19)
April 27, 2017	CNC	S 10b5-1	4,167	$72.43	$301,816	502,674 Direct	-0.82%	Disposed	79.6% (price as of 2026-08-19)
April 25, 2017	CNC	A	3,000	$66.93	$200,790	506,841 Direct	+0.60%	Acquired	94.4% (price as of 2026-08-19)
March 31, 2017	CNC	A	635	$66.93	$42,501	503,841 Direct	+0.13%	Acquired	94.4% (price as of 2026-08-19)
March 7, 2017	CNC	G	150	—	—	30,500 Indirect	-0.49%	Disposed	(price as of 2026-08-19)
Feb. 9, 2017	CNC	S 10b5-1	4,167	$68.73	$286,398	503,206 Direct	-0.82%	Disposed	89.3% (price as of 2026-08-19)
Dec. 31, 2016	CNC	A	720	$59.01	$42,487	507,373 Direct	+0.14%	Acquired	120.5% (price as of 2026-08-19)
Sept. 30, 2016	CNC	A	612	$69.47	$42,516	506,653 Direct	+0.12%	Acquired	87.3% (price as of 2026-08-19)
Sept. 7, 2016	CNC	P	150	$67.00	$10,050	30,650 Indirect	+0.49%	Acquired	94.2% (price as of 2026-08-19)
June 30, 2016	CNC	A	677	$62.81	$42,522	506,041 Direct	+0.13%	Acquired	107.1% (price as of 2026-08-19)
April 26, 2016	CNC	A	3,350	$62.86	$210,581	505,364 Direct	+0.67%	Acquired	107.0% (price as of 2026-08-19)
March 31, 2016	CNC	A	712	$59.70	$42,506	502,014 Direct	+0.14%	Acquired	117.9% (price as of 2026-08-19)
Dec. 31, 2015	CNC	A	717	$59.25	$42,482	501,302 Direct	+0.14%	Acquired	119.6% (price as of 2026-08-19)
Dec. 9, 2015	CNC	G	1,925	—	—	500,585 Direct	-0.38%	Disposed	(price as of 2026-08-19)
Sept. 30, 2015	CNC	A	635	$66.93	$42,501	502,510 Direct	+0.13%	Acquired	94.4% (price as of 2026-08-19)
July 30, 2015	CNC	S 10b5-1	15,000	$69.21	$1,038,150	501,875 Direct	-2.90%	Disposed	88.0% (price as of 2026-08-19)
June 30, 2015	CNC	A	592	$71.83	$42,523	516,875 Direct	+0.11%	Acquired	81.1% (price as of 2026-08-19)
April 30, 2015	CNC	S 10b5-1	15,000	$63.83	$957,450	516,283 Direct	-2.82%	Disposed	103.8% (price as of 2026-08-19)
April 28, 2015	CNC	A	2,910	$70.79	$205,999	531,283 Direct	+0.55%	Acquired	83.8% (price as of 2026-08-19)
March 31, 2015	CNC	A	597	$71.23	$42,524	528,373 Direct	+0.11%	Acquired	82.7% (price as of 2026-08-19)
March 9, 2015	CNC	S 10b5-1	15,000	$63.19	$947,850	527,777 Direct	-2.76%	Disposed	105.9% (price as of 2026-08-19)
Dec. 31, 2014	CNC	A	404	$105.31	$42,545	271,388 Direct	+0.15%	Acquired	147.1% (price as of 2026-08-19)
Nov. 6, 2014	CNC	G	1,090	—	—	270,985 Direct	-0.40%	Disposed	(price as of 2026-08-19)
Sept. 30, 2014	CNC	A	498	$83.72	$41,693	272,075 Direct	+0.18%	Acquired	210.8% (price as of 2026-08-19)
July 28, 2014	CNC	G	1,260	—	—	271,577 Direct	-0.46%	Disposed	(price as of 2026-08-19)
June 30, 2014	CNC	A	535	$74.80	$40,018	272,837 Direct	+0.20%	Acquired	247.9% (price as of 2026-08-19)
April 22, 2014	CNC	A	3,000	$57.29	$171,870	272,302 Direct	+1.11%	Acquired	354.2% (price as of 2026-08-19)
March 31, 2014	CNC	A	647	$61.78	$39,972	269,302 Direct	+0.24%	Acquired	321.2% (price as of 2026-08-19)
March 3, 2014	CNC	M	10,000	$16.65	$166,500	0 Direct	-100.00%	Disposed	1462.9% (price as of 2026-08-19)
March 3, 2014	CNC	F	4,905	$63.68	$312,350	268,655 Direct	-1.79%	Disposed	308.6% (price as of 2026-08-19)
March 3, 2014	CNC	M	10,000	$16.65	$166,500	273,560 Direct	+3.79%	Acquired	1462.9% (price as of 2026-08-19)
Dec. 31, 2013	CNC	A	688	$58.11	$39,980	263,560 Direct	+0.26%	Acquired	347.8% (price as of 2026-08-19)
Oct. 4, 2013	CNC	G	1,562	—	—	262,872 Direct	-0.59%	Disposed	(price as of 2026-08-19)
Sept. 30, 2013	CNC	A	619	$64.63	$40,006	264,434 Direct	+0.23%	Acquired	302.6% (price as of 2026-08-19)
June 30, 2013	CNC	A	762	$52.46	$39,975	263,815 Direct	+0.29%	Acquired	396.0% (price as of 2026-08-19)
April 23, 2013	CNC	A	4,000	$45.35	$181,400	263,052 Direct	+1.54%	Acquired	473.8% (price as of 2026-08-19)
March 31, 2013	CNC	A	908	$44.04	$39,988	259,052 Direct	+0.35%	Acquired	490.9% (price as of 2026-08-19)
Dec. 31, 2012	CNC	A	1,017	$39.35	$40,019	258,144 Direct	+0.40%	Acquired	561.3% (price as of 2026-08-19)
Sept. 30, 2012	CNC	A	1,069	$37.41	$39,991	257,127 Direct	+0.42%	Acquired	595.6% (price as of 2026-08-19)
June 30, 2012	CNC	A	1,326	$30.16	$39,992	256,058 Direct	+0.52%	Acquired	762.8% (price as of 2026-08-19)
April 24, 2012	CNC	A	4,000	$44.86	$179,440	254,732 Direct	+1.60%	Acquired	480.1% (price as of 2026-08-19)
April 19, 2012	CNC	G	52	$44.74	$2,326	250,732 Direct	-0.02%	Disposed	481.6% (price as of 2026-08-19)
March 31, 2012	CNC	A	783	$48.97	$38,344	250,784 Direct	+0.31%	Acquired	431.4% (price as of 2026-08-19)
March 5, 2012	CNC	M	22,500	$7.57	$170,325	0 Direct	-100.00%	Disposed	3337.5% (price as of 2026-08-19)
March 5, 2012	CNC	S 10b5-1	22,500	$46.65	$1,049,625	250,001 Direct	-8.26%	Disposed	457.8% (price as of 2026-08-19)
March 5, 2012	CNC	M	22,500	$7.57	$170,325	272,501 Direct	+9.00%	Acquired	3337.5% (price as of 2026-08-19)
Dec. 31, 2011	CNC	A	884	$39.59	$34,998	250,001 Direct	+0.35%	Acquired	557.3% (price as of 2026-08-19)
Dec. 22, 2011	CNC	G	234	$39.87	$9,330	249,117 Direct	-0.09%	Disposed	552.7% (price as of 2026-08-19)
Oct. 25, 2011	CNC	A	445	$29.07	$12,936	249,351 Direct	+0.18%	Acquired	795.1% (price as of 2026-08-19)
Sept. 30, 2011	CNC	A	1,199	$29.19	$34,999	248,906 Direct	+0.48%	Acquired	791.5% (price as of 2026-08-19)
June 30, 2011	CNC	A	979	$35.76	$35,009	247,707 Direct	+0.40%	Acquired	627.7% (price as of 2026-08-19)
April 26, 2011	CNC	A	3,110	$32.15	$99,986	246,728 Direct	+1.28%	Acquired	709.4% (price as of 2026-08-19)
March 31, 2011	CNC	A	1,070	$32.72	$35,010	243,618 Direct	+0.44%	Acquired	695.3% (price as of 2026-08-19)
Feb. 10, 2011	CNC	S 10b5-1	15,000	$29.36	$440,400	242,549 Direct	-5.82%	Disposed	786.3% (price as of 2026-08-19)
Dec. 31, 2010	CNC	A	1,361	$25.72	$35,005	257,549 Direct	+0.53%	Acquired	911.7% (price as of 2026-08-19)
Nov. 30, 2010	CNC	G	4,300	$23.40	$100,620	256,188 Direct	-1.65%	Disposed	1012.1% (price as of 2026-08-19)
Oct. 28, 2010	CNC	S 10b5-1	15,000	$22.66	$339,900	260,488 Direct	-5.44%	Disposed	1048.4% (price as of 2026-08-19)
Sept. 30, 2010	CNC	A	1,515	$23.10	$34,996	275,488 Direct	+0.55%	Acquired	1026.5% (price as of 2026-08-19)
Aug. 2, 2010	CNC	S 10b5-1	15,000	$22.00	$330,000	273,973 Direct	-5.19%	Disposed	1082.8% (price as of 2026-08-19)

Showing latest 100 of 148 transactions

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 3, 2014	CNC	Common Stock Option (right to buy)	Common Stock (10,000)	$16.65	May 4, 2014	10,000	Disposed
March 5, 2012	CNC	Common Stock Option (right to buy)	Common Stock (22,500)	$7.57	July 24, 2012	22,500	Disposed
Oct. 31, 2005	CNC	Common Stock Option (right to buy)	Common Stock (45,000)	$0.45	Oct. 20, 2010	45,000	Disposed
Oct. 31, 2005	CNC	Common Stock Option (right to buy)	Common Stock (30,000)	$0.34	Jan. 1, 2010	30,000	Disposed
Oct. 31, 2005	CNC	Common Stock Option (right to buy)	Common Stock (30,000)	$0.80	Sept. 26, 2007	30,000	Disposed
May 4, 2004	CNC	Common Stock Option (right to buy)	Common Stock (5,000)	$33.30	May 4, 2014	5,000	Acquired

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