Thomas P Stafford

Insider

First SEC filing: May 22, 2020 · Latest: May 22, 2020

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.

Insider at

Insider transactions

0 buys (P) 0 sells (S) Net: $0 + 37 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

37 other filings hidden

Date	Ticker	Code	Shares	Price	Value	Owned after	Δ own	A/D	vs now
May 18, 2023	NL	A	3,550	—	—	23,200 Direct	+18.07%	Acquired	(price as of 2026-08-20)
May 17, 2023	KRO	A	2,450	—	—	31,708 Direct	+8.37%	Acquired	(price as of 2026-08-20)
May 19, 2022	NL	A	2,500	—	—	19,650 Direct	+14.58%	Acquired	(price as of 2026-08-20)
May 18, 2022	KRO	A	1,200	—	—	29,259 Direct	+4.28%	Acquired	(price as of 2026-08-20)
May 20, 2021	NL	A	2,750	—	—	17,150 Direct	+19.10%	Acquired	(price as of 2026-08-20)
May 19, 2021	KRO	A	1,200	—	—	28,059 Direct	+4.47%	Acquired	(price as of 2026-08-20)
May 21, 2020	NL	A	6,650	—	—	13,400 Direct	+98.52%	Acquired	(price as of 2026-08-20)
May 20, 2020	KRO	A	2,250	—	—	26,859 Direct	+9.14%	Acquired	(price as of 2026-08-20)
May 20, 2020	KRO	A	2,200	—	—	26,809 Direct	+8.94%	Acquired	(price as of 2026-08-20)
May 16, 2019	NL	A	5,650	—	—	6,750 Direct	+513.64%	Acquired	(price as of 2026-08-20)
May 15, 2019	KRO	A	1,500	—	—	24,609 Direct	+6.49%	Acquired	(price as of 2026-08-20)
Dec. 31, 2018	NL	S	3,000	$3.52	$10,560	1,100 Direct	-73.17%	Disposed	81.5% (price as of 2026-08-20)
Dec. 31, 2018	NL	S	4,000	$3.59	$14,360	4,100 Direct	-49.38%	Disposed	78.0% (price as of 2026-08-20)
Dec. 31, 2018	NL	S	4,000	$3.59	$14,360	8,100 Direct	-33.06%	Disposed	78.0% (price as of 2026-08-20)
Dec. 31, 2018	NL	S	6,000	$3.67	$22,020	12,100 Direct	-33.15%	Disposed	74.1% (price as of 2026-08-20)
Dec. 31, 2018	NL	S	2,000	$3.68	$7,360	18,100 Direct	-9.95%	Disposed	73.6% (price as of 2026-08-20)
Oct. 18, 2018	KRO	S	1	$15.11	$15	29,258 Direct	0.00%	Disposed	-46.5% (price as of 2026-08-20)
May 17, 2018	NL	A	2,100	—	—	20,100 Direct	+11.67%	Acquired	(price as of 2026-08-20)
May 16, 2018	KRO	A	800	—	—	23,109 Direct	+3.59%	Acquired	(price as of 2026-08-20)
May 18, 2017	NL	A	1,500	—	—	18,000 Direct	+9.09%	Acquired	(price as of 2026-08-20)
May 17, 2017	KRO	A	1,000	—	—	22,309 Direct	+4.69%	Acquired	(price as of 2026-08-20)
Dec. 15, 2016	KRO	P	113	$11.50	$1,300	21,309 Direct	+0.53%	Acquired	-29.7% (price as of 2026-08-20)
Sept. 15, 2016	KRO	P	161	$7.96	$1,282	21,195 Direct	+0.77%	Acquired	1.5% (price as of 2026-08-20)
June 16, 2016	KRO	P	233	$5.33	$1,242	21,035 Direct	+1.12%	Acquired	51.6% (price as of 2026-08-20)
May 19, 2016	NL	A	2,000	—	—	16,500 Direct	+13.79%	Acquired	(price as of 2026-08-20)
May 18, 2016	KRO	A	1,500	—	—	20,578 Direct	+7.86%	Acquired	(price as of 2026-08-20)
March 17, 2016	KRO	P	223	$5.43	$1,211	20,801 Direct	+1.08%	Acquired	48.8% (price as of 2026-08-20)
Dec. 17, 2015	KRO	P	210	$5.62	$1,180	19,078 Direct	+1.11%	Acquired	43.8% (price as of 2026-08-20)
Sept. 17, 2015	KRO	P	168	$6.87	$1,154	18,868 Direct	+0.90%	Acquired	17.6% (price as of 2026-08-20)
Aug. 11, 2015	KRO	P	15,700	$7.06	$110,842	18,700 Direct	+523.33%	Acquired	14.4% (price as of 2026-08-20)
Aug. 11, 2015	KRO	P	15,700	$7.81	$122,617	18,700 Direct	+523.33%	Acquired	3.5% (price as of 2026-08-20)
May 21, 2015	NL	A	1,500	—	—	14,500 Direct	+11.54%	Acquired	(price as of 2026-08-20)
May 22, 2014	NL	A	1,500	—	—	13,000 Direct	+13.04%	Acquired	(price as of 2026-08-20)
May 21, 2014	KRO	A	1,000	—	—	2,000 Direct	+100.00%	Acquired	(price as of 2026-08-20)
May 15, 2013	NL	A	1,000	—	—	12,500 Direct	+8.70%	Acquired	(price as of 2026-08-20)
May 8, 2013	KRO	A	1,000	—	—	1,000 Direct	—	Acquired	(price as of 2026-08-20)
May 16, 2012	NL	A	1,000	—	—	11,500 Direct	+9.52%	Acquired	(price as of 2026-08-20)
May 18, 2011	NL	A	1,000	—	—	10,500 Direct	+10.53%	Acquired	(price as of 2026-08-20)
May 19, 2010	NL	A	1,500	—	—	9,500 Direct	+18.75%	Acquired	(price as of 2026-08-20)
May 12, 2009	NL	A	1,000	—	—	8,000 Direct	+14.29%	Acquired	(price as of 2026-08-20)
May 21, 2008	NL	A	1,000	—	—	7,000 Direct	+16.67%	Acquired	(price as of 2026-08-20)
May 25, 2007	NL	A	1,000	—	—	8,000 Direct	+14.29%	Acquired	(price as of 2026-08-20)
May 24, 2006	NL	A	1,000	—	—	7,000 Direct	+16.67%	Acquired	(price as of 2026-08-20)
May 19, 2005	NL	A	1,000	—	—	6,000 Direct	+20.00%	Acquired	(price as of 2026-08-20)
Sept. 30, 2004	NL	S	2,000	$18.83	$37,660	3,000 Direct	-40.00%	Disposed	-66.1% (price as of 2026-08-20)
Sept. 30, 2004	NL	M	2,000	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
Sept. 30, 2004	NL	M	2,000	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
Sept. 30, 2004	NL	M	2,000	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
Sept. 30, 2004	NL	S	6,000	$18.70	$112,200	5,000 Direct	-54.55%	Disposed	-65.8% (price as of 2026-08-20)
Sept. 30, 2004	NL	M	2,000	$11.89	$23,780	11,000 Direct	+22.22%	Acquired	-46.3% (price as of 2026-08-20)
Sept. 30, 2004	NL	M	2,000	$5.81	$11,620	9,000 Direct	+28.57%	Acquired	10.0% (price as of 2026-08-20)
Sept. 30, 2004	NL	M	2,000	$5.18	$10,360	7,000 Direct	+40.00%	Acquired	23.4% (price as of 2026-08-20)
May 20, 2004	NL	A	1,000	—	—	5,000 Direct	+25.00%	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
Sept. 30, 2004	NL	Non-Qualified Stock Option (right to buy)	Common Stock, $0.125 par value (2,000)	$11.89	Feb. 1, 2006	2,000	Disposed
Sept. 30, 2004	NL	Non-Qualified Stock Option (right to buy)	Common Stock, $0.125 par value (2,000)	$5.81	Feb. 1, 2005	2,000	Disposed
Sept. 30, 2004	NL	Non-Qualified Stock Option (right to buy)	Common Stock, $0.125 par value (2,000)	$5.18	Feb. 1, 2007	2,000	Disposed

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