Sheila C. Cheston

Insider

First SEC filing: Oct. 2, 2024 · Latest: Oct. 2, 2024

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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.
Initial holdings The stakes this person held when they first started reporting.
Compensation Executive pay disclosed in company proxy statements.

Insider at

NOC selling May 3, 2021

Insider transactions

0 buys (P) 0 sells (S) Net: $0 + 82 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

82 other filings hidden

Date	Ticker	Code	Shares	Price	Value	Owned after	Δ own	A/D	vs now
May 3, 2021	NOC	S 10b5-1	5,037	$352.04	$1,773,225	29,281 Direct	-14.68%	Disposed	58.9% (price as of 2026-08-21)
Feb. 16, 2021	NOC	A	6,518	—	—	23,610 Direct	+38.13%	Acquired	(price as of 2026-08-21)
Feb. 16, 2021	NOC	M	5,430	—	—	35,276 Direct	+18.19%	Acquired	(price as of 2026-08-21)
Feb. 16, 2021	NOC	M	2,348	—	—	37,624 Direct	+6.66%	Acquired	(price as of 2026-08-21)
Feb. 16, 2021	NOC	F	1,197	—	—	36,427 Direct	-3.18%	Disposed	(price as of 2026-08-21)
Feb. 16, 2021	NOC	F	2,109	—	—	34,318 Direct	-5.79%	Disposed	(price as of 2026-08-21)
Feb. 16, 2021	NOC	A	6,518	—	—	23,610 Direct	+38.13%	Acquired	(price as of 2026-08-21)
Feb. 16, 2021	NOC	M	5,430	—	—	18,180 Direct	-23.00%	Disposed	(price as of 2026-08-21)
Feb. 16, 2021	NOC	A	2,846	—	—	10,245 Direct	+38.46%	Acquired	(price as of 2026-08-21)
Feb. 16, 2021	NOC	M	2,348	—	—	7,897 Direct	-22.92%	Disposed	(price as of 2026-08-21)
March 5, 2020	NOC	G	1,500	—	—	29,846 Direct	-4.79%	Disposed	(price as of 2026-08-21)
Feb. 20, 2020	NOC	S 10b5-1	824	$365.28	$300,991	31,346 Direct	-2.56%	Disposed	53.1% (price as of 2026-08-21)
Feb. 18, 2020	NOC	M	3,189	—	—	43,031 Direct	+8.00%	Acquired	(price as of 2026-08-21)
Feb. 18, 2020	NOC	F	1,541	$372.42	$573,899	41,490 Direct	-3.58%	Disposed	50.2% (price as of 2026-08-21)
Feb. 18, 2020	NOC	S 10b5-1	9,320	$367.26	$3,422,863	32,170 Direct	-22.46%	Disposed	52.3% (price as of 2026-08-21)
Feb. 18, 2020	NOC	M	3,189	—	—	7,399 Direct	-30.12%	Disposed	(price as of 2026-08-21)
Feb. 12, 2020	NOC	M	9,075	—	—	43,822 Direct	+26.12%	Acquired	(price as of 2026-08-21)
Feb. 12, 2020	NOC	F	3,980	—	—	39,842 Direct	-9.08%	Disposed	(price as of 2026-08-21)
Feb. 12, 2020	NOC	A	6,656	—	—	26,167 Direct	+34.11%	Acquired	(price as of 2026-08-21)
Feb. 12, 2020	NOC	M	9,075	—	—	17,092 Direct	-34.68%	Disposed	(price as of 2026-08-21)
Feb. 12, 2020	NOC	A	2,206	—	—	10,588 Direct	+26.32%	Acquired	(price as of 2026-08-21)
March 1, 2019	NOC	S 10b5-1	17,000	$288.01	$4,896,170	34,747 Direct	-32.85%	Disposed	94.2% (price as of 2026-08-21)
Feb. 19, 2019	NOC	M	4,120	—	—	53,737 Direct	+8.30%	Acquired	(price as of 2026-08-21)
Feb. 19, 2019	NOC	F	1,990	$287.35	$571,826	51,747 Direct	-3.70%	Disposed	94.7% (price as of 2026-08-21)
Feb. 19, 2019	NOC	M	4,120	—	—	8,382 Direct	-32.95%	Disposed	(price as of 2026-08-21)
Feb. 13, 2019	NOC	M	10,441	—	—	54,136 Direct	+23.90%	Acquired	(price as of 2026-08-21)
Feb. 13, 2019	NOC	F	4,519	—	—	49,617 Direct	-8.35%	Disposed	(price as of 2026-08-21)
Feb. 13, 2019	NOC	A	8,076	—	—	29,952 Direct	+36.92%	Acquired	(price as of 2026-08-21)
Feb. 13, 2019	NOC	M	10,441	—	—	19,511 Direct	-34.86%	Disposed	(price as of 2026-08-21)
Feb. 13, 2019	NOC	A	2,845	—	—	12,502 Direct	+29.46%	Acquired	(price as of 2026-08-21)
Oct. 3, 2018	NOC	S 10b5-1	10,440	$320.00	$3,340,800	43,696 Direct	-19.28%	Disposed	74.8% (price as of 2026-08-21)
Feb. 18, 2018	NOC	M	4,651	—	—	56,362 Direct	+8.99%	Acquired	(price as of 2026-08-21)
Feb. 18, 2018	NOC	F	2,247	$350.36	$787,259	54,115 Direct	-3.99%	Disposed	59.7% (price as of 2026-08-21)
Feb. 18, 2018	NOC	M	4,651	—	—	9,657 Direct	-32.51%	Disposed	(price as of 2026-08-21)
Feb. 13, 2018	NOC	M	14,796	—	—	58,858 Direct	+33.58%	Acquired	(price as of 2026-08-21)
Feb. 13, 2018	NOC	F	7,126	—	—	51,732 Direct	-12.11%	Disposed	(price as of 2026-08-21)
Feb. 13, 2018	NOC	M	14,796	—	—	21,876 Direct	-40.35%	Disposed	(price as of 2026-08-21)
Feb. 13, 2018	NOC	M	14,796	—	—	58,858 Direct	+33.58%	Acquired	(price as of 2026-08-21)
Feb. 13, 2018	NOC	F	7,147	—	—	51,711 Direct	-12.14%	Disposed	(price as of 2026-08-21)
Feb. 13, 2018	NOC	A	10,103	—	—	36,672 Direct	+38.03%	Acquired	(price as of 2026-08-21)
Feb. 13, 2018	NOC	M	14,796	—	—	21,876 Direct	-40.35%	Disposed	(price as of 2026-08-21)
Feb. 13, 2018	NOC	A	2,348	—	—	14,308 Direct	+19.63%	Acquired	(price as of 2026-08-21)
Feb. 23, 2017	NOC	S 10b5-1	6,772	$242.11	$1,639,569	44,062 Direct	-13.32%	Disposed	131.1% (price as of 2026-08-21)
Feb. 19, 2017	NOC	M	5,796	—	—	11,960 Direct	-32.64%	Disposed	(price as of 2026-08-21)
Feb. 19, 2017	NOC	F	2,951	$243.58	$718,805	50,834 Direct	-5.49%	Disposed	129.7% (price as of 2026-08-21)
Feb. 19, 2017	NOC	M	5,796	—	—	53,785 Direct	+12.08%	Acquired	(price as of 2026-08-21)
Feb. 17, 2017	NOC	A	3,189	—	—	17,756 Direct	+21.89%	Acquired	(price as of 2026-08-21)
Feb. 17, 2017	NOC	M	20,571	—	—	26,569 Direct	-43.64%	Disposed	(price as of 2026-08-21)
Feb. 17, 2017	NOC	A	14,298	—	—	47,140 Direct	+43.54%	Acquired	(price as of 2026-08-21)
Feb. 17, 2017	NOC	F	9,870	$243.58	$2,404,135	47,989 Direct	-17.06%	Disposed	129.7% (price as of 2026-08-21)
Feb. 17, 2017	NOC	M	20,571	—	—	57,859 Direct	+55.17%	Acquired	(price as of 2026-08-21)
Nov. 15, 2016	NOC	S 10b5-1	3,394	$251.29	$852,878	37,288 Direct	-8.34%	Disposed	122.6% (price as of 2026-08-21)
June 7, 2016	NOC	S 10b5-1	3,105	$215.52	$669,190	40,682 Direct	-7.09%	Disposed	159.6% (price as of 2026-08-21)
May 2, 2016	NOC	S 10b5-1	12,731	$206.49	$2,628,824	43,787 Direct	-22.53%	Disposed	170.9% (price as of 2026-08-21)
March 3, 2016	NOC	S 10b5-1	11,857	$190.04	$2,253,304	56,518 Direct	-17.34%	Disposed	194.4% (price as of 2026-08-21)
Feb. 20, 2016	NOC	M	9,085	—	—	14,567 Direct	-38.41%	Disposed	(price as of 2026-08-21)
Feb. 20, 2016	NOC	F	4,625	$190.68	$881,895	68,375 Direct	-6.34%	Disposed	193.4% (price as of 2026-08-21)
Feb. 20, 2016	NOC	M	9,085	—	—	73,000 Direct	+14.21%	Acquired	(price as of 2026-08-21)
Feb. 17, 2016	NOC	A	4,120	—	—	23,652 Direct	+21.09%	Acquired	(price as of 2026-08-21)
Feb. 17, 2016	NOC	M	37,654	—	—	32,842 Direct	-53.41%	Disposed	(price as of 2026-08-21)
Feb. 17, 2016	NOC	A	21,630	—	—	70,496 Direct	+44.26%	Acquired	(price as of 2026-08-21)
Feb. 17, 2016	NOC	F	18,402	$190.06	$3,497,484	63,915 Direct	-22.36%	Disposed	194.3% (price as of 2026-08-21)
Feb. 17, 2016	NOC	M	37,654	—	—	82,317 Direct	+84.31%	Acquired	(price as of 2026-08-21)
March 2, 2015	NOC	S 10b5-1	15,657	$166.11	$2,600,784	44,662 Direct	-25.96%	Disposed	236.8% (price as of 2026-08-21)
Feb. 18, 2015	NOC	A	4,651	—	—	19,532 Direct	+31.25%	Acquired	(price as of 2026-08-21)
Feb. 18, 2015	NOC	M	38,456	—	—	48,866 Direct	-44.04%	Disposed	(price as of 2026-08-21)
Feb. 18, 2015	NOC	A	22,682	—	—	87,322 Direct	+35.09%	Acquired	(price as of 2026-08-21)
Feb. 18, 2015	NOC	F	19,574	$167.68	$3,282,168	60,320 Direct	-24.50%	Disposed	233.6% (price as of 2026-08-21)
Feb. 18, 2015	NOC	M	38,456	—	—	79,894 Direct	+92.80%	Acquired	(price as of 2026-08-21)
Feb. 13, 2015	NOC	M	23,541	—	—	14,881 Direct	-61.27%	Disposed	(price as of 2026-08-21)
Feb. 13, 2015	NOC	F	11,106	$167.14	$1,856,257	41,438 Direct	-21.14%	Disposed	234.7% (price as of 2026-08-21)
Feb. 13, 2015	NOC	M	23,541	—	—	52,544 Direct	+81.17%	Acquired	(price as of 2026-08-21)
Nov. 12, 2014	NOC	S 10b5-1	7,847	$136.09	$1,067,898	31,259 Direct	-20.07%	Disposed	311.1% (price as of 2026-08-21)
March 3, 2014	NOC	S 10b5-1	2,632	$120.00	$315,840	39,106 Direct	-6.31%	Disposed	366.2% (price as of 2026-08-21)
Feb. 21, 2014	NOC	S 10b5-1	8,247	$119.76	$987,661	41,738 Direct	-16.50%	Disposed	367.1% (price as of 2026-08-21)
Feb. 19, 2014	NOC	S	2,255	$119.11	$268,593	58,639 Direct	-3.70%	Disposed	369.6% (price as of 2026-08-21)
Feb. 19, 2014	NOC	M	4,510	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-21)
Feb. 19, 2014	NOC	A	5,796	—	—	38,422 Direct	+17.76%	Acquired	(price as of 2026-08-21)
Feb. 19, 2014	NOC	M	21,436	—	—	64,639 Direct	-24.90%	Disposed	(price as of 2026-08-21)
Feb. 19, 2014	NOC	A	21,853	—	—	86,075 Direct	+34.03%	Acquired	(price as of 2026-08-21)
Feb. 19, 2014	NOC	F	10,910	$119.05	$1,298,836	49,985 Direct	-17.92%	Disposed	369.9% (price as of 2026-08-21)
Feb. 19, 2014	NOC	M	4,510	$63.22	$285,122	60,895 Direct	+8.00%	Acquired	784.8% (price as of 2026-08-21)
Feb. 19, 2014	NOC	M	21,436	—	—	56,385 Direct	+61.34%	Acquired	(price as of 2026-08-21)
Feb. 19, 2014	NOC	M	4,510	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-21)
Feb. 19, 2014	NOC	M	4,510	$63.22	$285,122	39,459 Direct	+12.90%	Acquired	784.8% (price as of 2026-08-21)
Feb. 18, 2014	NOC	M	14,615	—	—	4,510 Direct	-76.42%	Disposed	(price as of 2026-08-21)
Feb. 18, 2014	NOC	S	14,615	$120.11	$1,755,408	34,949 Direct	-29.49%	Disposed	365.7% (price as of 2026-08-21)
Feb. 18, 2014	NOC	M	14,615	$63.22	$923,960	49,564 Direct	+41.82%	Acquired	784.8% (price as of 2026-08-21)
Nov. 14, 2013	NOC	M	29,158	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-21)
Nov. 14, 2013	NOC	S	25,764	$110.00	$2,834,040	34,949 Direct	-42.44%	Disposed	408.5% (price as of 2026-08-21)
Nov. 14, 2013	NOC	M	29,158	$58.58	$1,708,076	60,713 Direct	+92.40%	Acquired	854.9% (price as of 2026-08-21)
June 6, 2013	NOC	M	29,158	$58.58	$1,708,076	29,158 Direct	-50.00%	Disposed	854.9% (price as of 2026-08-21)
June 6, 2013	NOC	M	19,124	$63.22	$1,209,019	19,125 Direct	-50.00%	Disposed	784.8% (price as of 2026-08-21)
June 6, 2013	NOC	S	45,177	$81.60	$3,686,443	31,555 Direct	-58.88%	Disposed	585.5% (price as of 2026-08-21)
June 6, 2013	NOC	M	19,124	$63.22	$1,209,019	76,732 Direct	+33.20%	Acquired	784.8% (price as of 2026-08-21)
June 6, 2013	NOC	M	29,158	$58.58	$1,708,076	57,608 Direct	+102.49%	Acquired	854.9% (price as of 2026-08-21)
Feb. 20, 2013	NOC	A	9,085	$66.04	$599,973	32,626 Direct	+38.59%	Acquired	747.1% (price as of 2026-08-21)
Feb. 20, 2013	NOC	M	33,118	—	—	64,222 Direct	-34.02%	Disposed	(price as of 2026-08-21)
Feb. 20, 2013	NOC	A	37,522	—	—	97,340 Direct	+62.73%	Acquired	(price as of 2026-08-21)
Feb. 20, 2013	NOC	F	16,624	$66.04	$1,097,849	28,450 Direct	-36.88%	Disposed	747.1% (price as of 2026-08-21)

Showing latest 100 of 123 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
Feb. 16, 2021	NOC	Restricted Performance Stock Rights	Common Stock (6,518)	—	—	6,518	Acquired
Feb. 16, 2021	NOC	Restricted Performance Stock Rights	Common Stock (6,518)	—	—	6,518	Acquired
Feb. 16, 2021	NOC	Restricted Performance Stock Rights	Common Stock (5,430)	—	—	5,430	Disposed
Feb. 16, 2021	NOC	Restricted Stock Rights	Common Stock (2,846)	—	—	2,846	Acquired
Feb. 16, 2021	NOC	Restricted Stock Rights	Common Stock (2,348)	—	—	2,348	Disposed
Feb. 18, 2020	NOC	Restricted Stock Rights	Common Stock (3,189)	—	—	3,189	Disposed
Feb. 12, 2020	NOC	Restricted Performance Stock Rights	Common Stock (6,656)	—	—	6,656	Acquired
Feb. 12, 2020	NOC	Restricted Performance Stock Rights	Common Stock (9,075)	—	—	9,075	Disposed
Feb. 12, 2020	NOC	Restricted Stock Rights	Common Stock (2,206)	—	—	2,206	Acquired
Feb. 19, 2019	NOC	Restricted Stock Rights	Common Stock (4,120)	—	—	4,120	Disposed
Feb. 13, 2019	NOC	Restricted Performance Stock Rights	Common Stock (8,076)	—	—	8,076	Acquired
Feb. 13, 2019	NOC	Restricted Performance Stock Rights	Common Stock (10,441)	—	—	10,441	Disposed
Feb. 13, 2019	NOC	Restricted Stock Rights	Common Stock (2,845)	—	—	2,845	Acquired
Feb. 18, 2018	NOC	Restricted Stock Rights	Common Stock (4,651)	—	—	4,651	Disposed
Feb. 13, 2018	NOC	Restricted Performance Stock Rights	Common Stock (14,796)	—	—	14,796	Disposed
Feb. 13, 2018	NOC	Restricted Performance Stock Rights	Common Stock (10,103)	—	—	10,103	Acquired
Feb. 13, 2018	NOC	Restricted Performance Stock Rights	Common Stock (14,796)	—	—	14,796	Disposed
Feb. 13, 2018	NOC	Restricted Stock Rights	Common Stock (2,348)	—	—	2,348	Acquired
Feb. 19, 2017	NOC	Restricted Stock Rights	Common Stock (5,796)	—	—	5,796	Disposed
Feb. 17, 2017	NOC	Restricted Stock Rights	Common Stock (3,189)	—	—	3,189	Acquired
Feb. 17, 2017	NOC	Restricted Performance Stock Rights	Common Stock (20,571)	—	—	20,571	Disposed
Feb. 17, 2017	NOC	Restricted Performance Stock Rights	Common Stock (14,298)	—	—	14,298	Acquired
Feb. 20, 2016	NOC	Restricted Stock Rights	Common Stock (9,085)	—	—	9,085	Disposed
Feb. 17, 2016	NOC	Restricted Stock Rights	Common Stock (4,120)	—	—	4,120	Acquired
Feb. 17, 2016	NOC	Restricted Performance Stock Rights	Common Stock (37,654)	—	—	37,654	Disposed
Feb. 17, 2016	NOC	Restricted Performance Stock Rights	Common Stock (21,630)	—	—	21,630	Acquired
Feb. 18, 2015	NOC	Restricted Stock Rights	Common Stock (4,651)	—	—	4,651	Acquired
Feb. 18, 2015	NOC	Restricted Performance Stock Rights	Common Stock (38,456)	—	—	38,456	Disposed
Feb. 18, 2015	NOC	Restricted Performance Stock Rights	Common Stock (22,682)	—	—	22,682	Acquired
Feb. 13, 2015	NOC	Restricted Stock Rights	Common Stock (23,541)	—	—	23,541	Disposed
Feb. 19, 2014	NOC	Stock Option (Right-to-buy)	Common Stock (4,510)	$63.22	Feb. 15, 2018	4,510	Disposed
Feb. 19, 2014	NOC	Restricted Stock Rights	Common Stock (5,796)	—	—	5,796	Acquired
Feb. 19, 2014	NOC	Restricted Performance Stock Rights	Common Stock (21,436)	—	—	21,436	Disposed
Feb. 19, 2014	NOC	Restricted Performance Stock Rights	Common Stock (21,853)	—	—	21,853	Acquired
Feb. 19, 2014	NOC	Stock Option (Right-to-buy)	Common Stock (4,510)	$63.22	Feb. 15, 2018	4,510	Disposed
Feb. 18, 2014	NOC	Stock Option (Right-to-buy)	Common Stock (14,615)	$63.22	Feb. 15, 2018	14,615	Disposed
Nov. 14, 2013	NOC	Stock Option (Right-to-buy)	Common Stock (29,158)	$58.58	Nov. 11, 2017	29,158	Disposed
June 6, 2013	NOC	Stock Option (Right-to-buy)	Common Stock (29,158)	$58.58	Nov. 11, 2017	29,158	Disposed
June 6, 2013	NOC	Stock Option (Right-to-buy)	Common Stock (19,124)	$63.22	Feb. 15, 2018	19,124	Disposed
Feb. 20, 2013	NOC	Restricted Stock Rights	Common Stock (9,085)	—	—	9,085	Acquired
Feb. 20, 2013	NOC	Restricted Performance Stock Rights	Common Stock (33,118)	—	—	33,118	Disposed
Feb. 20, 2013	NOC	Restricted Performance Stock Rights	Common Stock (37,522)	—	—	37,522	Acquired
Nov. 9, 2012	NOC	Restricted Stock Rights	Common Stock (18,048)	—	—	18,048	Disposed
Aug. 24, 2012	NOC	Stock Option (Right-to-buy)	Common Stock (29,157)	$58.58	Nov. 11, 2017	29,157	Disposed
Aug. 24, 2012	NOC	Stock Option (Right-to-buy)	Common Stock (19,123)	$63.22	Feb. 15, 2018	19,123	Disposed
Feb. 15, 2012	NOC	Restricted Stock Rights	Common Stock [F3] (10,059)	—	—	10,059	Acquired
Feb. 15, 2012	NOC	Restricted Performance Stock Rights	Common Stock [F1] (25,637)	—	—	25,637	Acquired
March 31, 2011	NOC	Stock Option (Right-to-Buy)	Common Stock (57,372)	$63.22	Feb. 15, 2018	57,372	Acquired
March 31, 2011	NOC	Stock Option (Right-to-Buy)	Common Stock (87,473)	$58.58	Nov. 11, 2017	87,473	Acquired
Feb. 15, 2011	NOC	Stock Option(Right-to-Buy)	Common Stock (52,454)	$69.14	Feb. 15, 2018	52,454	Acquired
Nov. 11, 2010	NOC	Stock Option(Right-to-Buy)	Common Stock (79,975)	$64.07	Nov. 11, 2017	79,975	Acquired

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

Initial ownership (Form 3) 2 holdings

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

Date	Ticker	Security	Shares	Ownership
Oct. 2, 2024	DMRC	Common Stock	0	Direct
Aug. 31, 2010	NOC	See footnote. [F1]	0	Direct

Compensation (DEF 14A)

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

NOC

Fiscal year	Salary	Bonus	Stock awards	Option awards	Non-equity incentive	Pension change	Other	Total
2010	$218,077	$500,000	—	—	$820,000	$0	$40,887	$6,199,096

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