Charles T Munger

Insider

First SEC filing: Oct. 5, 2023 · Latest: Oct. 5, 2023

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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

DJCO
COST

Insider transactions

0 buys (P) 0 sells (S) Net: $0 + 62 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

62 other filings hidden

Date	Ticker	Code	Shares	Price	Value	Owned after	Δ own	A/D	vs now
Oct. 22, 2023	COST	A	489	—	—	168,104 Direct	+0.29%	Acquired	(price as of 2026-08-20)
Oct. 5, 2023	BRK-B	G	77	—	—	4,033 Direct	-1.87%	Disposed
March 9, 2023	BRK-B	G	60	—	—	4,110 Direct	-1.44%	Disposed
Oct. 22, 2022	COST	A	565	—	—	167,615 Direct	+0.34%	Acquired	(price as of 2026-08-20)
June 16, 2022	DJCO	J	3,720	—	—	46,280 Direct	-7.44%	Disposed	(price as of 2026-08-20)
May 16, 2022	BRK-B	G	100	—	—	4,170 Direct	-2.34%	Disposed
Dec. 22, 2021	BRK-B	G	100	—	—	4,270 Direct	-2.29%	Disposed
Oct. 22, 2021	COST	A	561	—	—	167,050 Direct	+0.34%	Acquired	(price as of 2026-08-20)
Sept. 10, 2021	BRK-B	G	40	—	—	4,370 Direct	-0.91%	Disposed
April 26, 2021	BRK-B	G	40	—	—	4,410 Direct	-0.90%	Disposed
April 7, 2021	BRK-B	G	107	—	—	643 Direct	-14.27%	Disposed
April 7, 2021	BRK-B	G	8	—	—	4,450 Direct	-0.18%	Disposed
Dec. 11, 2020	COST	A	34	—	—	166,489 Direct	+0.02%	Acquired	(price as of 2026-08-20)
Dec. 2, 2020	BRK-B	G	40	—	—	4,458 Direct	-0.89%	Disposed
Oct. 22, 2020	COST	A	719	—	—	166,455 Direct	+0.43%	Acquired	(price as of 2026-08-20)
Sept. 22, 2020	BRK-B	G	20	—	—	4,498 Direct	-0.44%	Disposed
June 15, 2020	BRK-B	G	20	—	—	4,518 Direct	-0.44%	Disposed
Oct. 22, 2019	COST	A	901	—	—	165,736 Direct	+0.55%	Acquired	(price as of 2026-08-20)
Oct. 22, 2018	COST	A	1,179	—	—	164,835 Direct	+0.72%	Acquired	(price as of 2026-08-20)
Sept. 26, 2018	BRK-B	G	214	—	—	4,538 Direct	-4.50%	Disposed
June 1, 2018	BRK-B	G	26	—	—	4,752 Direct	-0.54%	Disposed
Feb. 26, 2018	BRK-B	G	67	—	—	4,778 Direct	-1.38%	Disposed
Nov. 3, 2017	BRK-B	G	18	—	—	4,845 Direct	-0.37%	Disposed
Oct. 22, 2017	COST	A	1,680	—	—	163,656 Direct	+1.04%	Acquired	(price as of 2026-08-20)
Oct. 22, 2017	COST	A	1,870	—	—	163,846 Direct	+1.15%	Acquired	(price as of 2026-08-20)
June 26, 2017	BRK-B	G	20	—	—	4,863 Direct	-0.41%	Disposed
May 24, 2017	COST	A	140	$173.01	$24,221	161,976 Direct	+0.09%	Acquired	441.9% (price as of 2026-08-20)
Dec. 23, 2016	BRK-B	G	21	—	—	4,883 Direct	-0.43%	Disposed
Dec. 23, 2016	BRK-B	G	21	—	—	4,883 Direct	-0.43%	Disposed
Oct. 22, 2016	COST	A	2,182	—	—	161,836 Direct	+1.37%	Acquired	(price as of 2026-08-20)
Oct. 22, 2015	COST	A	2,150	—	—	159,654 Direct	+1.37%	Acquired	(price as of 2026-08-20)
March 6, 2015	COST	M	6,734	$39.02	$262,761	0 Direct	-100.00%	Disposed	2302.7% (price as of 2026-08-20)
March 6, 2015	COST	M	6,734	$39.02	$262,761	157,504 Direct	+4.47%	Acquired	2302.7% (price as of 2026-08-20)
Feb. 27, 2015	COST	A	6,734	$39.02	$262,761	6,734 Direct	—	Acquired	2302.7% (price as of 2026-08-20)
Feb. 27, 2015	COST	A	216	$146.96	$31,743	150,770 Direct	+0.14%	Acquired	537.9% (price as of 2026-08-20)
Oct. 22, 2014	COST	A	2,400	—	—	150,554 Direct	+1.62%	Acquired	(price as of 2026-08-20)
Oct. 16, 2014	BRK-B	G	220	—	—	4,904 Direct	-4.29%	Disposed
Sept. 12, 2014	BRK-B	G	100	—	—	5,124 Direct	-1.91%	Disposed
Feb. 19, 2014	BRK-B	G	100	—	—	5,224 Direct	-1.88%	Disposed
Jan. 15, 2014	COST	M	6,457	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
Jan. 15, 2014	COST	M	6,457	$34.71	$224,122	148,154 Direct	+4.56%	Acquired	2601.0% (price as of 2026-08-20)
Oct. 22, 2013	COST	A	2,400	—	—	141,697 Direct	+1.72%	Acquired	(price as of 2026-08-20)
Oct. 14, 2013	BRK-B	G	30	—	—	5,324 Direct	-0.56%	Disposed
Oct. 11, 2013	BRK-B	G	320	—	—	5,354 Direct	-5.64%	Disposed
May 29, 2013	BRK-B	G	11	—	—	5,674 Direct	-0.19%	Disposed
May 29, 2013	BRK-B	G	189	—	—	5,685 Direct	-3.22%	Disposed
April 24, 2013	BRK-B	G	350	—	—	5,874 Direct	-5.62%	Disposed
Feb. 13, 2013	COST	M	6,457	$28.26	$182,475	0 Direct	-100.00%	Disposed	3217.5% (price as of 2026-08-20)
Feb. 13, 2013	COST	M	6,457	$28.26	$182,475	139,297 Direct	+4.86%	Acquired	3217.5% (price as of 2026-08-20)
Dec. 12, 2012	COST	A	6,457	$40.69	$262,735	6,457 Direct	—	Acquired	2204.1% (price as of 2026-08-20)
Dec. 12, 2012	COST	A	6,457	$34.71	$224,122	6,457 Direct	—	Acquired	2601.0% (price as of 2026-08-20)
Dec. 12, 2012	COST	A	6,457	$28.26	$182,475	6,457 Direct	—	Acquired	3217.5% (price as of 2026-08-20)
Dec. 12, 2012	COST	A	456	$98.31	$44,829	132,840 Direct	+0.34%	Acquired	853.6% (price as of 2026-08-20)
Oct. 22, 2012	COST	A	3,000	—	—	132,384 Direct	+2.32%	Acquired	(price as of 2026-08-20)
March 9, 2012	COST	M	6,000	$39.65	$237,900	0 Direct	-100.00%	Disposed	2264.5% (price as of 2026-08-20)
March 9, 2012	COST	M	6,000	$39.65	$237,900	129,384 Direct	+4.86%	Acquired	2264.5% (price as of 2026-08-20)
Feb. 21, 2012	BRK-B	G	158	—	—	6,235 Direct	-2.47%	Disposed
Dec. 28, 2011	BRK-B	G	10	—	—	6,393 Direct	-0.16%	Disposed
Oct. 22, 2011	COST	A	3,000	—	—	123,384 Direct	+2.49%	Acquired	(price as of 2026-08-20)
March 21, 2011	COST	M	6,000	$36.19	$217,140	0 Direct	-100.00%	Disposed	2490.5% (price as of 2026-08-20)
March 21, 2011	COST	M	6,000	$36.19	$217,140	120,384 Direct	+5.25%	Acquired	2490.5% (price as of 2026-08-20)
Dec. 22, 2010	BRK-B	G	25	—	—	6,403 Direct	-0.39%	Disposed
Nov. 23, 2010	BRK-B	S	3	$118850.00	$356,550	6,469 Direct	-0.05%	Disposed
Nov. 23, 2010	BRK-B	S	1	$118863.00	$118,863	6,472 Direct	-0.02%	Disposed
Nov. 23, 2010	BRK-B	S	2	$119100.00	$238,200	6,473 Direct	-0.03%	Disposed
Nov. 23, 2010	BRK-B	S	9	$119085.00	$1,071,765	6,475 Direct	-0.14%	Disposed
Nov. 23, 2010	BRK-B	S	1	$118710.00	$118,710	6,484 Direct	-0.02%	Disposed
Nov. 23, 2010	BRK-B	S	1	$118727.00	$118,727	6,485 Direct	-0.02%	Disposed
Nov. 23, 2010	BRK-B	S	1	$118754.00	$118,754	6,486 Direct	-0.02%	Disposed
Nov. 23, 2010	BRK-B	S	1	$119178.00	$119,178	6,487 Direct	-0.02%	Disposed
Nov. 23, 2010	BRK-B	S	1	$119159.00	$119,159	6,488 Direct	-0.02%	Disposed
Nov. 23, 2010	BRK-B	S	1	$119204.00	$119,204	6,489 Direct	-0.02%	Disposed
Nov. 23, 2010	BRK-B	S	8	$119250.00	$954,000	6,490 Direct	-0.12%	Disposed
Nov. 23, 2010	BRK-B	S	5	$119212.60	$596,063	6,498 Direct	-0.08%	Disposed
Nov. 23, 2010	BRK-B	S	1	$119130.00	$119,130	6,503 Direct	-0.02%	Disposed
Nov. 23, 2010	BRK-B	S	1	$119208.50	$119,208	6,504 Direct	-0.02%	Disposed
Nov. 23, 2010	BRK-B	S	1	$119310.00	$119,310	6,505 Direct	-0.02%	Disposed
Nov. 23, 2010	BRK-B	S	1	$119415.50	$119,416	6,506 Direct	-0.02%	Disposed
Nov. 23, 2010	BRK-B	S	6	$119400.00	$716,400	6,507 Direct	-0.09%	Disposed
Nov. 23, 2010	BRK-B	S	2	$119325.90	$238,652	6,513 Direct	-0.03%	Disposed
Nov. 23, 2010	BRK-B	S	1	$119282.00	$119,282	6,515 Direct	-0.02%	Disposed
Nov. 23, 2010	BRK-B	S	1	$119303.00	$119,303	6,516 Direct	-0.02%	Disposed
Nov. 23, 2010	BRK-B	S	1	$119305.00	$119,305	6,517 Direct	-0.02%	Disposed
Nov. 23, 2010	BRK-B	S	1	$119312.50	$119,312	6,518 Direct	-0.02%	Disposed
Nov. 23, 2010	BRK-B	S	1	$119435.70	$119,436	6,519 Direct	-0.02%	Disposed
Nov. 23, 2010	BRK-B	S	1	$119550.00	$119,550	6,520 Direct	-0.02%	Disposed
Nov. 23, 2010	BRK-B	S	2	$119622.90	$239,246	6,521 Direct	-0.03%	Disposed
Nov. 23, 2010	BRK-B	S	2	$119680.00	$239,360	6,523 Direct	-0.03%	Disposed
Nov. 23, 2010	BRK-B	S	1	$119650.00	$119,650	6,525 Direct	-0.02%	Disposed
Nov. 23, 2010	BRK-B	S	1	$119311.00	$119,311	6,526 Direct	-0.02%	Disposed
Nov. 23, 2010	BRK-B	S	1	$119312.00	$119,312	6,527 Direct	-0.02%	Disposed
Nov. 23, 2010	BRK-B	S	1	$118780.80	$118,781	6,428 Direct	-0.02%	Disposed
Nov. 23, 2010	BRK-B	S	1	$118691.30	$118,691	6,429 Direct	-0.02%	Disposed
Nov. 23, 2010	BRK-B	S	2	$118705.00	$237,410	6,430 Direct	-0.03%	Disposed
Nov. 23, 2010	BRK-B	S	1	$118720.00	$118,720	6,432 Direct	-0.02%	Disposed
Nov. 23, 2010	BRK-B	S	3	$118708.00	$356,124	6,433 Direct	-0.05%	Disposed
Nov. 23, 2010	BRK-B	S	1	$118506.00	$118,506	6,436 Direct	-0.02%	Disposed
Nov. 23, 2010	BRK-B	S	12	$118500.00	$1,422,000	6,437 Direct	-0.19%	Disposed
Nov. 23, 2010	BRK-B	S	1	$118555.00	$118,555	6,449 Direct	-0.02%	Disposed
Nov. 23, 2010	BRK-B	S	1	$118557.00	$118,557	6,450 Direct	-0.02%	Disposed

Showing latest 100 of 219 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
Oct. 5, 2023	BRK-B	Class A Common Stock	See footnote (1) [F1]	—	—	77	Disposed
March 9, 2023	BRK-B	Class A Common Stock	See footnote (1) [F1]	—	—	60	Disposed
May 16, 2022	BRK-B	Class A Common Stock	See footnote (1)	—	—	100	Disposed
Dec. 22, 2021	BRK-B	Class A Common Stock	See footnote [F1]	—	—	100	Disposed
Sept. 10, 2021	BRK-B	Class A Common Stock	See footnote [F1]	—	—	40	Disposed
April 26, 2021	BRK-B	Class A Common Stock	See footnote [F1]	—	—	40	Disposed
April 7, 2021	BRK-B	Class A Common Stock	See footnote [F3]	—	—	8	Disposed
Dec. 2, 2020	BRK-B	Class A Common Stock	See footnote [F1]	—	—	40	Disposed
Sept. 22, 2020	BRK-B	Class A Common Stock	See footnote [F1]	—	—	20	Disposed
June 15, 2020	BRK-B	Class A Common Stock	See footnote [F1]	—	—	20	Disposed
Sept. 26, 2018	BRK-B	Class A Common Stock	See Footnote [F1]	—	—	214	Disposed
June 1, 2018	BRK-B	Class A Common Stock	See Footnote [F1]	—	—	26	Disposed
Feb. 26, 2018	BRK-B	Class A Common Stock	See Footnote [F1]	—	—	67	Disposed
Nov. 3, 2017	BRK-B	Class A Common Stock	See Footnote [F1]	—	—	18	Disposed
June 26, 2017	BRK-B	Class A Common Stock	See Footnote [F1]	—	—	20	Disposed
Dec. 23, 2016	BRK-B	Class A Common Stock	See Footnote [F1]	—	—	21	Disposed
Dec. 23, 2016	BRK-B	Class A Common Stock	See footnote [F1]	—	—	21	Disposed
March 6, 2015	COST	Stock Option	Common Stock (6,734)	$39.02	April 1, 2015	6,734	Disposed
Feb. 27, 2015	COST	Stock Option	Common Stock (6,734)	—	April 1, 2015	6,734	Acquired
Oct. 16, 2014	BRK-B	Class A Common Stock	See footnote [F1]	—	—	220	Disposed
Sept. 12, 2014	BRK-B	Class A Common Stock	See footnote [F1]	—	—	100	Disposed
Feb. 19, 2014	BRK-B	Class A Common Stock	See footnote (1)	—	—	100	Disposed
Jan. 15, 2014	COST	Stock Option	Common Stock (6,457)	$34.71	April 1, 2014	6,457	Disposed
Oct. 14, 2013	BRK-B	Class A Common Stock	See footnote 1	—	—	30	Disposed
Oct. 11, 2013	BRK-B	Class A Common Stock	See footnote 1	—	—	320	Disposed
May 29, 2013	BRK-B	Class A Common Stock	See footnote 1	—	—	11	Disposed
May 29, 2013	BRK-B	Class A Common Stock	See footnote 1	—	—	189	Disposed
April 24, 2013	BRK-B	Class A Common Stock	See footnote 1	—	—	350	Disposed
Feb. 13, 2013	COST	Stock Option	Common Stock (6,457)	$28.26	April 1, 2013	6,457	Disposed
Dec. 12, 2012	COST	Stock Option	Common Stock (6,457)	—	April 1, 2015	6,457	Acquired
Dec. 12, 2012	COST	Stock Option	Common Stock (6,457)	—	April 1, 2014	6,457	Acquired
Dec. 12, 2012	COST	Stock Option	Common Stock (6,457)	—	April 1, 2013	6,457	Acquired
March 9, 2012	COST	Stock Option	Common Stock (6,000)	$39.65	April 1, 2012	6,000	Disposed
Feb. 21, 2012	BRK-B	Class A Common Stock	See footnote 1	—	—	158	Disposed
Dec. 28, 2011	BRK-B	Class A Common Stock	See footnote 1	—	—	10	Disposed
March 21, 2011	COST	Stock Option	Common Stock (60,000)	$36.19	April 2, 2011	6,000	Disposed
Dec. 22, 2010	BRK-B	Class A Common Stock	See footnote 1.	—	—	25	Disposed
Nov. 23, 2010	BRK-B	Class A Common Stock	See footnote 1	—	—	3	Disposed
Nov. 23, 2010	BRK-B	Class A Common Stock	See footnote 1	—	—	1	Disposed
Nov. 23, 2010	BRK-B	Class A Common Stock	See footnote 1	—	—	2	Disposed
Nov. 23, 2010	BRK-B	Class A Common Stock	See footnote 1	—	—	9	Disposed
Nov. 23, 2010	BRK-B	Class A Common Stock	See footnote 1	—	—	1	Disposed
Nov. 23, 2010	BRK-B	Class A Common Stock	See footnote 1	—	—	1	Disposed
Nov. 23, 2010	BRK-B	Class A Common Stock	See footnote 1	—	—	1	Disposed
Nov. 23, 2010	BRK-B	Class A Common Stock	See footnote 1	—	—	1	Disposed
Nov. 23, 2010	BRK-B	Class A Common Stock	See footnote 1	—	—	1	Disposed
Nov. 23, 2010	BRK-B	Class A Common Stock	See footnote 1	—	—	1	Disposed
Nov. 23, 2010	BRK-B	Class A Common Stock	See footnote 1	—	—	8	Disposed
Nov. 23, 2010	BRK-B	Class A Common Stock	See footnote 1	—	—	5	Disposed
Nov. 23, 2010	BRK-B	Class A Common Stock	See footnote 1	—	—	1	Disposed
Nov. 23, 2010	BRK-B	Class A Common Stock	See footnote 1	—	—	1	Disposed
Nov. 23, 2010	BRK-B	Class A Common Stock	See footnote 1	—	—	1	Disposed
Nov. 23, 2010	BRK-B	Class A Common Stock	See footnote 1	—	—	1	Disposed
Nov. 23, 2010	BRK-B	Class A Common Stock	See footnote 1	—	—	6	Disposed
Nov. 23, 2010	BRK-B	Class A Common Stock	See footnote 1	—	—	2	Disposed
Nov. 23, 2010	BRK-B	Class A Common Stock	See footnote 1	—	—	1	Disposed
Nov. 23, 2010	BRK-B	Class A Common Stock	See footnote 1	—	—	1	Disposed
Nov. 23, 2010	BRK-B	Class A Common Stock	See footnote 1	—	—	1	Disposed
Nov. 23, 2010	BRK-B	Class A Common Stock	See footnote 1	—	—	1	Disposed
Nov. 23, 2010	BRK-B	Class A Common Stock	See footnote 1	—	—	1	Disposed
Nov. 23, 2010	BRK-B	Class A Common Stock	See footnote 1	—	—	1	Disposed
Nov. 23, 2010	BRK-B	Class A Common Stock	See footnote 1	—	—	2	Disposed
Nov. 23, 2010	BRK-B	Class A Common Stock	See footnote 1	—	—	2	Disposed
Nov. 23, 2010	BRK-B	Class A Common Stock	See footnote 1	—	—	1	Disposed
Nov. 23, 2010	BRK-B	Class A Common Stock	See footnote 1	—	—	1	Disposed
Nov. 23, 2010	BRK-B	Class A Common Stock	See footnote 1	—	—	1	Disposed
Nov. 23, 2010	BRK-B	Class A Common Stock	See footnote 1	—	—	1	Disposed
Nov. 23, 2010	BRK-B	Class A Common Stock	See footnote 1	—	—	1	Disposed
Nov. 23, 2010	BRK-B	Class A Common Stock	See footnote 1	—	—	2	Disposed
Nov. 23, 2010	BRK-B	Class A Common Stock	See footnote 1	—	—	1	Disposed
Nov. 23, 2010	BRK-B	Class A Common Stock	See footnote 1	—	—	3	Disposed
Nov. 23, 2010	BRK-B	Class A Common Stock	See footnote 1	—	—	1	Disposed
Nov. 23, 2010	BRK-B	Class A Common Stock	See footnote 1	—	—	12	Disposed
Nov. 23, 2010	BRK-B	Class A Common Stock	See footnote 1	—	—	1	Disposed
Nov. 23, 2010	BRK-B	Class A Common Stock	See footnote 1	—	—	1	Disposed
Nov. 23, 2010	BRK-B	Class A Common Stock	See footnote 1	—	—	2	Disposed
Nov. 23, 2010	BRK-B	Class A Common Stock	See footnote 1	—	—	1	Disposed
Nov. 23, 2010	BRK-B	Class A Common Stock	See footnote 1	—	—	5	Disposed
Nov. 23, 2010	BRK-B	Class A Common Stock	See footnote 1	—	—	1	Disposed
Nov. 23, 2010	BRK-B	Class A Common Stock	See footnote 1	—	—	1	Disposed
Nov. 23, 2010	BRK-B	Class A Common Stock	See footnote 1	—	—	6	Disposed
Nov. 23, 2010	BRK-B	Class A Common Stock	See footnote 1	—	—	1	Disposed
Nov. 23, 2010	BRK-B	Class A Common Stock	See footnote 1	—	—	1	Disposed
Nov. 4, 2010	BRK-B	Class A Common Stock	See footnote 4	—	—	40	Disposed
Nov. 4, 2010	BRK-B	Class A Common Stock	See footnote 4	—	—	40	Disposed
Nov. 4, 2010	BRK-B	Class A Common Stock	See footnote 4	—	—	150	Disposed
Nov. 4, 2010	BRK-B	Class A Common Stock	See footnote 4	—	—	150	Disposed
Nov. 4, 2010	BRK-B	Class A Common Stock	See footnote 4	—	—	150	Disposed
Nov. 4, 2010	BRK-B	Class A Common Stock	See footnote 4	—	—	120	Disposed
Nov. 4, 2010	BRK-B	Class A Common Stock	See footnote 4	—	—	120	Disposed
Nov. 4, 2010	BRK-B	Class A Common Stock	See footnote 4	—	—	120	Disposed
Nov. 4, 2010	BRK-B	Class A Common Stock	See footnote 4	—	—	100	Disposed
Nov. 4, 2010	BRK-B	Class A Common Stock	See footnote 4	—	—	100	Disposed
Nov. 4, 2010	BRK-B	Class A Common Stock	See footnote 4	—	—	100	Disposed
Nov. 4, 2010	BRK-B	Class A Common Stock	See footnote 4	—	—	96	Disposed
Nov. 4, 2010	BRK-B	Class A Common Stock	See footnote 4	—	—	96	Disposed
Nov. 4, 2010	BRK-B	Class A Common Stock	See footnote 4	—	—	751	Disposed
Nov. 4, 2010	BRK-B	Class A Common Stock	See footnote 4	—	—	671	Disposed
Nov. 4, 2010	BRK-B	Class A Common Stock	See footnote 4	—	—	301	Disposed
Nov. 4, 2010	BRK-B	Class A Common Stock	See footnote 4	—	—	751	Disposed

Showing latest 100 of 165 transactions

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