Walter Isaacson

Insider

First SEC filing: May 22, 2026 · Latest: May 22, 2026

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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

UAL selling Dec. 9, 2016

Insider transactions

0 buys (P) 0 sells (S) Net: $0 + 85 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

85 other filings hidden

Date	Ticker	Code	Shares	Price	Value	Owned after	Δ own	A/D	vs now
June 30, 2026	UAL	A	292	—	—	22,569 Direct	+1.31%	Acquired	(price as of 2026-08-19)
May 20, 2026	UAL	A	2,130	—	—	2,130 Direct	—	Acquired	(price as of 2026-08-19)
March 31, 2026	UAL	A	447	—	—	22,277 Direct	+2.05%	Acquired	(price as of 2026-08-19)
Dec. 31, 2025	UAL	A	359	—	—	21,830 Direct	+1.67%	Acquired	(price as of 2026-08-19)
Sept. 30, 2025	UAL	A	412	—	—	21,471 Direct	+1.96%	Acquired	(price as of 2026-08-19)
June 30, 2025	UAL	A	503	—	—	21,059 Direct	+2.45%	Acquired	(price as of 2026-08-19)
May 22, 2025	UAL	A	2,410	—	—	2,410 Direct	—	Acquired	(price as of 2026-08-19)
March 31, 2025	UAL	A	598	—	—	20,556 Direct	+3.00%	Acquired	(price as of 2026-08-19)
Dec. 31, 2024	UAL	A	412	—	—	19,958 Direct	+2.11%	Acquired	(price as of 2026-08-19)
Sept. 30, 2024	UAL	A	695	—	—	19,547 Direct	+3.69%	Acquired	(price as of 2026-08-19)
June 30, 2024	UAL	A	826	—	—	18,851 Direct	+4.58%	Acquired	(price as of 2026-08-19)
May 23, 2024	UAL	A	3,459	—	—	3,459 Direct	—	Acquired	(price as of 2026-08-19)
March 29, 2024	UAL	A	841	—	—	18,026 Direct	+4.89%	Acquired	(price as of 2026-08-19)
Dec. 29, 2023	UAL	A	873	—	—	17,185 Direct	+5.35%	Acquired	(price as of 2026-08-19)
Sept. 30, 2023	UAL	A	855	—	—	16,312 Direct	+5.53%	Acquired	(price as of 2026-08-19)
June 30, 2023	UAL	A	666	—	—	15,458 Direct	+4.50%	Acquired	(price as of 2026-08-19)
May 25, 2023	UAL	A	3,598	—	—	3,598 Direct	—	Acquired	(price as of 2026-08-19)
March 31, 2023	UAL	A	823	—	—	14,792 Direct	+5.89%	Acquired	(price as of 2026-08-19)
Dec. 30, 2022	UAL	A	960	—	—	13,968 Direct	+7.38%	Acquired	(price as of 2026-08-19)
Sept. 30, 2022	UAL	A	1,108	—	—	13,008 Direct	+9.31%	Acquired	(price as of 2026-08-19)
June 30, 2022	UAL	A	1,045	—	—	11,901 Direct	+9.63%	Acquired	(price as of 2026-08-19)
May 26, 2022	UAL	A	3,767	—	—	3,767 Direct	—	Acquired	(price as of 2026-08-19)
March 31, 2022	UAL	A	784	—	—	10,856 Direct	+7.78%	Acquired	(price as of 2026-08-19)
Dec. 31, 2021	UAL	A	820	—	—	10,072 Direct	+8.86%	Acquired	(price as of 2026-08-19)
Sept. 30, 2021	UAL	A	759	—	—	9,252 Direct	+8.94%	Acquired	(price as of 2026-08-19)
June 30, 2021	UAL	A	692	—	—	8,494 Direct	+8.87%	Acquired	(price as of 2026-08-19)
May 27, 2021	UAL	A	2,904	—	—	2,904 Direct	—	Acquired	(price as of 2026-08-19)
March 31, 2021	UAL	A	630	—	—	7,802 Direct	+8.78%	Acquired	(price as of 2026-08-19)
Dec. 31, 2020	UAL	A	827	—	—	7,172 Direct	+13.03%	Acquired	(price as of 2026-08-19)
May 21, 2020	UAL	A	6,592	—	—	6,592 Direct	—	Acquired	(price as of 2026-08-19)
March 31, 2020	UAL	A	1,130	—	—	6,345 Direct	+21.67%	Acquired	(price as of 2026-08-19)
Dec. 31, 2019	UAL	A	412	—	—	5,216 Direct	+8.58%	Acquired	(price as of 2026-08-19)
Sept. 30, 2019	UAL	A	410	—	—	4,804 Direct	+9.33%	Acquired	(price as of 2026-08-19)
June 28, 2019	UAL	A	416	—	—	4,394 Direct	+10.46%	Acquired	(price as of 2026-08-19)
May 23, 2019	UAL	A	2,103	—	—	2,103 Direct	—	Acquired	(price as of 2026-08-19)
March 29, 2019	UAL	A	457	—	—	3,978 Direct	+12.98%	Acquired	(price as of 2026-08-19)
Dec. 31, 2018	UAL	A	388	—	—	3,521 Direct	+12.38%	Acquired	(price as of 2026-08-19)
Sept. 28, 2018	UAL	A	366	—	—	3,133 Direct	+13.23%	Acquired	(price as of 2026-08-19)
June 29, 2018	UAL	A	449	—	—	2,768 Direct	+19.36%	Acquired	(price as of 2026-08-19)
May 24, 2018	UAL	A	2,284	—	—	2,284 Direct	—	Acquired	(price as of 2026-08-19)
March 30, 2018	UAL	A	443	—	—	2,319 Direct	+23.61%	Acquired	(price as of 2026-08-19)
Dec. 29, 2017	UAL	A	452	—	—	1,875 Direct	+31.76%	Acquired	(price as of 2026-08-19)
Sept. 29, 2017	UAL	A	501	—	—	1,423 Direct	+54.34%	Acquired	(price as of 2026-08-19)
June 30, 2017	UAL	A	405	—	—	922 Direct	+78.34%	Acquired	(price as of 2026-08-19)
June 9, 2017	UAL	M	2,707	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-19)
June 9, 2017	UAL	D	1,354	$79.82	$108,076	6,353 Direct	-17.57%	Disposed	48.1% (price as of 2026-08-19)
June 9, 2017	UAL	M	2,707	—	—	7,707 Direct	+54.14%	Acquired	(price as of 2026-08-19)
May 25, 2017	UAL	A	1,993	—	—	1,993 Direct	—	Acquired	(price as of 2026-08-19)
March 31, 2017	UAL	A	517	—	—	517 Direct	—	Acquired	(price as of 2026-08-19)
Dec. 9, 2016	UAL	S	2,638	$75.80	$199,960	5,000 Direct	-34.54%	Disposed	56.0% (price as of 2026-08-19)
June 11, 2016	UAL	M	2,362	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-19)
June 11, 2016	UAL	D	1,182	$46.16	$54,561	7,638 Direct	-13.40%	Disposed	156.1% (price as of 2026-08-19)
June 11, 2016	UAL	M	2,362	—	—	8,820 Direct	+36.57%	Acquired	(price as of 2026-08-19)
June 9, 2016	UAL	A	2,707	—	—	2,707 Direct	—	Acquired	(price as of 2026-08-19)
June 12, 2015	UAL	M	2,916	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-19)
June 12, 2015	UAL	D	1,458	$52.69	$76,822	6,458 Direct	-18.42%	Disposed	124.4% (price as of 2026-08-19)
June 12, 2015	UAL	M	2,916	—	—	7,916 Direct	+58.32%	Acquired	(price as of 2026-08-19)
June 11, 2015	UAL	A	2,362	—	—	2,362 Direct	—	Acquired	(price as of 2026-08-19)
June 13, 2014	UAL	M	3,869	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-19)
June 13, 2014	UAL	D	3,869	$42.64	$164,974	5,000 Direct	-43.62%	Disposed	177.3% (price as of 2026-08-19)
June 13, 2014	UAL	M	3,869	—	—	8,869 Direct	+77.38%	Acquired	(price as of 2026-08-19)
June 12, 2014	UAL	A	2,916	—	—	2,916 Direct	—	Acquired	(price as of 2026-08-19)
Feb. 4, 2014	UAL	S	5,000	$44.01	$220,050	5,000 Direct	-50.00%	Disposed	168.7% (price as of 2026-08-19)
June 13, 2013	UAL	A	3,869	—	—	3,869 Direct	—	Acquired	(price as of 2026-08-19)
June 13, 2013	UAL	M	3,560	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-19)
June 13, 2013	UAL	D	3,560	$32.31	$115,024	10,000 Direct	-26.25%	Disposed	265.9% (price as of 2026-08-19)
June 13, 2013	UAL	M	3,560	—	—	13,560 Direct	+35.60%	Acquired	(price as of 2026-08-19)
June 13, 2012	UAL	A	3,560	—	—	3,560 Direct	—	Acquired	(price as of 2026-08-19)
June 9, 2012	UAL	M	3,636	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-19)
June 9, 2012	UAL	D	3,636	$22.94	$83,410	10,000 Direct	-26.66%	Disposed	415.4% (price as of 2026-08-19)
June 9, 2012	UAL	M	3,636	—	—	13,636 Direct	+36.36%	Acquired	(price as of 2026-08-19)
June 9, 2011	UAL	A	3,636	—	—	3,636 Direct	—	Acquired	(price as of 2026-08-19)
Dec. 31, 2010	UAL	A	372	—	—	19,679 Direct	+1.93%	Acquired	(price as of 2026-08-19)
Sept. 30, 2010	UAL	A	823	—	—	19,308 Direct	+4.45%	Acquired	(price as of 2026-08-19)
June 30, 2010	UAL	A	797	—	—	18,484 Direct	+4.51%	Acquired	(price as of 2026-08-19)
June 10, 2010	UAL	A	1,139	—	—	7,028 Direct	+19.34%	Acquired	(price as of 2026-08-19)
March 31, 2010	UAL	A	848	—	—	17,688 Direct	+5.04%	Acquired	(price as of 2026-08-19)
Dec. 31, 2009	UAL	A	1,432	—	—	16,840 Direct	+9.29%	Acquired	(price as of 2026-08-19)
Sept. 30, 2009	UAL	A	1,821	—	—	15,407 Direct	+13.40%	Acquired	(price as of 2026-08-19)
June 30, 2009	UAL	A	4,091	—	—	13,586 Direct	+43.09%	Acquired	(price as of 2026-08-19)
June 11, 2009	UAL	A	5,889	—	—	5,889 Direct	—	Acquired	(price as of 2026-08-19)
March 31, 2009	UAL	A	3,344	—	—	9,495 Direct	+54.37%	Acquired	(price as of 2026-08-19)
Dec. 31, 2008	UAL	A	1,492	—	—	6,151 Direct	+32.02%	Acquired	(price as of 2026-08-19)
Sept. 30, 2008	UAL	A	1,364	—	—	4,659 Direct	+41.40%	Acquired	(price as of 2026-08-19)
June 30, 2008	UAL	A	2,427	—	—	3,295 Direct	+279.61%	Acquired	(price as of 2026-08-19)
March 31, 2008	UAL	A	868	—	—	868 Direct	—	Acquired	(price as of 2026-08-19)
Feb. 1, 2006	UAL	A	10,000	—	—	10,000 Direct	—	Acquired	(price as of 2026-08-19)

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
June 30, 2026	UAL	Share Units	Common Stock (292)	—	—	292	Acquired
May 20, 2026	UAL	Share Units	Common Stock (2,130)	—	—	2,130	Acquired
March 31, 2026	UAL	Share Units	Common Stock (447)	—	—	447	Acquired
Dec. 31, 2025	UAL	Share Units	Common Stock (359)	—	—	359	Acquired
Sept. 30, 2025	UAL	Share Units	Common Stock (412)	—	—	412	Acquired
June 30, 2025	UAL	Share Units	Common Stock (503)	—	—	503	Acquired
May 22, 2025	UAL	Share Units	Common Stock (2,410)	—	—	2,410	Acquired
March 31, 2025	UAL	Share Units	Common Stock (598)	—	—	598	Acquired
Dec. 31, 2024	UAL	Share Units	Common Stock (412)	—	—	412	Acquired
Sept. 30, 2024	UAL	Share Units	Common Stock (695)	—	—	695	Acquired
June 30, 2024	UAL	Share Units	Common Stock (826)	—	—	826	Acquired
May 23, 2024	UAL	Share Units	Common Stock (3,459)	—	—	3,459	Acquired
March 29, 2024	UAL	Share Units	Common Stock (841)	—	—	841	Acquired
Dec. 29, 2023	UAL	Share Units	Common Stock (873)	—	—	873	Acquired
Sept. 30, 2023	UAL	Share Units	Common Stock (855)	—	—	855	Acquired
June 30, 2023	UAL	Share Units	Common Stock (666)	—	—	666	Acquired
May 25, 2023	UAL	Share Units	Common Stock (3,598)	—	—	3,598	Acquired
March 31, 2023	UAL	Share Units	Common Stock (823)	—	—	823	Acquired
Dec. 30, 2022	UAL	Share Units	Common Stock (960)	—	—	960	Acquired
Sept. 30, 2022	UAL	Share Units	Common Stock (1,108)	—	—	1,108	Acquired
June 30, 2022	UAL	Share Units	Common Stock (1,045)	—	—	1,045	Acquired
May 26, 2022	UAL	Share Units	Common Stock (3,767)	—	—	3,767	Acquired
March 31, 2022	UAL	Share Units	Common Stock (784)	—	—	784	Acquired
Dec. 31, 2021	UAL	Share Units	Common Stock (820)	—	—	820	Acquired
Sept. 30, 2021	UAL	Share Units	Common Stock (759)	—	—	759	Acquired
June 30, 2021	UAL	Share Units	Common Stock (692)	—	—	692	Acquired
May 27, 2021	UAL	Share Units	Common Stock (2,904)	—	—	2,904	Acquired
March 31, 2021	UAL	Share Units	Common Stock (630)	—	—	630	Acquired
Dec. 31, 2020	UAL	Share Units	Common Stock (827)	—	—	827	Acquired
May 21, 2020	UAL	Share Units	Common Stock (6,592)	—	—	6,592	Acquired
March 31, 2020	UAL	Share Units	Common Stock (1,130)	—	—	1,130	Acquired
Dec. 31, 2019	UAL	Share Units	Common Stock (412)	—	—	412	Acquired
Sept. 30, 2019	UAL	Share Units	Common Stock (410)	—	—	410	Acquired
June 28, 2019	UAL	Share Units	Common Stock (416)	—	—	416	Acquired
May 23, 2019	UAL	Share Units	Common Stock (2,103)	—	—	2,103	Acquired
March 29, 2019	UAL	Share Units	Common Stock (457)	—	—	457	Acquired
Dec. 31, 2018	UAL	Share Units	Common Stock (388)	—	—	388	Acquired
Sept. 28, 2018	UAL	Share Units	Common Stock (366)	—	—	366	Acquired
June 29, 2018	UAL	Share Units	Common Stock (449)	—	—	449	Acquired
May 24, 2018	UAL	Share Units	Common Stock (2,284)	—	—	2,284	Acquired
March 30, 2018	UAL	Share Units	Common Stock (443)	—	—	443	Acquired
Dec. 29, 2017	UAL	Share Units	Common Stock (452)	—	—	452	Acquired
Sept. 29, 2017	UAL	Share Units	Common Stock (501)	—	—	501	Acquired
June 30, 2017	UAL	Share Units	Common Stock (405)	—	—	405	Acquired
June 9, 2017	UAL	Share Units	Common Stock (2,707)	—	June 9, 2017	2,707	Disposed
May 25, 2017	UAL	Share Units	Common Stock (1,993)	—	—	1,993	Acquired
March 31, 2017	UAL	Share Units	Common Stock (517)	—	—	517	Acquired
June 11, 2016	UAL	Share Units	Common Stock (2,362)	—	June 11, 2016	2,362	Disposed
June 9, 2016	UAL	Share Unites	Common Stock (2,707)	—	June 9, 2017	2,707	Acquired
June 12, 2015	UAL	Share Units	Common Stock (2,916)	—	June 12, 2015	2,916	Disposed
June 11, 2015	UAL	Share Units	Common Stock (2,362)	—	June 11, 2016	2,362	Acquired
June 13, 2014	UAL	Share Units	Common Stock (3,869)	—	June 13, 2014	3,869	Disposed
June 12, 2014	UAL	Share Units	Common Stock (2,916)	—	June 12, 2015	2,916	Acquired
June 13, 2013	UAL	Share Units	Common Stock (3,869)	—	June 13, 2014	3,869	Acquired
June 13, 2013	UAL	Share Units	Common Stock (3,560)	—	June 13, 2013	3,560	Disposed
June 13, 2012	UAL	Share Units	Common Stock (3,560)	—	June 13, 2013	3,560	Acquired
June 9, 2012	UAL	Share Units	Common Stock (3,636)	—	June 9, 2012	3,636	Disposed
June 9, 2011	UAL	Share Units	Common Stock (3,636)	—	—	3,636	Acquired
Dec. 31, 2010	UAL	Share Units	Common Stock (372)	—	—	372	Acquired
Sept. 30, 2010	UAL	Share Units	Common Stock (823)	—	—	823	Acquired
June 30, 2010	UAL	Share Units	Common Stock (797)	—	—	797	Acquired
June 10, 2010	UAL	Share Units	Common Stock (1,139)	—	—	1,139	Acquired
March 31, 2010	UAL	Share Units	Common Stock (848)	—	—	848	Acquired
Dec. 31, 2009	UAL	Share Units	Common Stock (1,432)	—	—	1,432	Acquired
Sept. 30, 2009	UAL	Share Units	Common Stock (1,821)	—	—	1,821	Acquired
June 30, 2009	UAL	Share Units	Common Stock (4,091)	—	—	4,091	Acquired
June 11, 2009	UAL	Share Units	Common Stock (5,889)	—	—	5,889	Acquired
March 31, 2009	UAL	Share Units	Common Stock (3,344)	—	—	3,344	Acquired
Dec. 31, 2008	UAL	Share Units	Common Stock (1,492)	—	—	1,492	Acquired
Sept. 30, 2008	UAL	Share Units	Common Stock (1,364)	—	—	1,364	Acquired
June 30, 2008	UAL	Share Units	Common Stock (2,427)	—	—	2,427	Acquired
March 31, 2008	UAL	Share Units	Common Stock (868)	—	—	868	Acquired

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