John K Castleberry

CIK 1195517 · View on SEC EDGAR ↗

Insider

First SEC filing: Feb. 20, 2007 · Latest: Feb. 20, 2007

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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.
Compensation Executive pay disclosed in company proxy statements.

Insider at

MDU selling May 18, 2005

Insider transactions

0 buys (P) 0 sells (S) Net: $0 + 22 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

22 other filings hidden

Date	Ticker	Code	Shares	Price	Value	Owned after	Δ own	A/D	vs now
Feb. 15, 2007	MDU	F	5,042	$26.08	$131,495	27,931 Direct	-15.29%	Disposed	107.8% (price as of 2026-08-20)
Feb. 15, 2007	MDU	A	16,109	—	—	32,973 Direct	+95.52%	Acquired	(price as of 2026-08-20)
Feb. 16, 2006	MDU	F	2,317	$34.65	$80,284	11,243 Direct	-17.09%	Disposed	134.6% (price as of 2026-08-20)
Feb. 16, 2006	MDU	A	4,570	—	—	13,560 Direct	+50.83%	Acquired	(price as of 2026-08-20)
May 18, 2005	MDU	I	357	$27.89	$9,957	0 Indirect	-100.00%	Disposed	191.5% (price as of 2026-08-20)
May 18, 2005	MDU	I	22,010	$27.89	$613,859	0 Indirect	-100.00%	Disposed	191.5% (price as of 2026-08-20)
May 18, 2005	MDU	S	6,800	$28.00	$190,400	6,230 Direct	-52.19%	Disposed	190.4% (price as of 2026-08-20)
May 17, 2005	MDU	S	14,174	$27.75	$393,328	13,030 Direct	-52.10%	Disposed	193.0% (price as of 2026-08-20)
May 16, 2005	MDU	S	20,974	$27.50	$576,785	27,204 Direct	-43.53%	Disposed	195.6% (price as of 2026-08-20)
May 12, 2005	MDU	S	5,346	$28.15	$150,490	48,178 Direct	-9.99%	Disposed	188.8% (price as of 2026-08-20)
Feb. 17, 2005	MDU	F	683	$27.68	$18,905	53,174 Direct	-1.27%	Disposed	193.7% (price as of 2026-08-20)
Feb. 17, 2005	MDU	F	1,557	$27.68	$43,098	53,857 Direct	-2.81%	Disposed	193.7% (price as of 2026-08-20)
Feb. 17, 2005	MDU	A	4,880	—	—	55,414 Direct	+9.66%	Acquired	(price as of 2026-08-20)
Nov. 22, 2004	MDU	M	20,000	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
Nov. 22, 2004	MDU	M	25,000	—	—	20,000 Direct	-55.56%	Disposed	(price as of 2026-08-20)
Nov. 22, 2004	MDU	M	25,000	—	—	45,000 Direct	-35.71%	Disposed	(price as of 2026-08-20)
Nov. 22, 2004	MDU	S	20,000	$26.85	$537,000	47,939 Direct	-29.44%	Disposed	202.8% (price as of 2026-08-20)
Nov. 22, 2004	MDU	S	25,000	$26.83	$670,750	67,939 Direct	-26.90%	Disposed	203.0% (price as of 2026-08-20)
Nov. 22, 2004	MDU	S	25,000	$26.70	$667,500	92,939 Direct	-21.20%	Disposed	204.5% (price as of 2026-08-20)
Nov. 22, 2004	MDU	M	20,000	$19.83	$396,600	117,939 Direct	+20.42%	Acquired	310.0% (price as of 2026-08-20)
Nov. 22, 2004	MDU	M	25,000	$19.83	$495,750	97,939 Direct	+34.28%	Acquired	310.0% (price as of 2026-08-20)
Nov. 22, 2004	MDU	M	25,000	$19.83	$495,750	72,939 Direct	+52.15%	Acquired	310.0% (price as of 2026-08-20)
Aug. 23, 2004	MDU	M	1,100	—	—	70,000 Direct	-1.55%	Disposed	(price as of 2026-08-20)
Aug. 23, 2004	MDU	S	1,100	$24.88	$27,368	47,632 Direct	-2.26%	Disposed	226.8% (price as of 2026-08-20)
Aug. 23, 2004	MDU	M	1,100	$19.83	$21,813	48,732 Direct	+2.31%	Acquired	310.0% (price as of 2026-08-20)
Aug. 20, 2004	MDU	M	400	—	—	71,100 Direct	-0.56%	Disposed	(price as of 2026-08-20)
Aug. 20, 2004	MDU	S	400	$24.85	$9,940	47,632 Direct	-0.83%	Disposed	227.2% (price as of 2026-08-20)
Aug. 20, 2004	MDU	M	400	$19.83	$7,932	48,032 Direct	+0.84%	Acquired	310.0% (price as of 2026-08-20)
Aug. 19, 2004	MDU	M	23,000	—	—	71,500 Direct	-24.34%	Disposed	(price as of 2026-08-20)
Aug. 19, 2004	MDU	S	2,100	$24.95	$52,395	47,632 Direct	-4.22%	Disposed	225.9% (price as of 2026-08-20)
Aug. 19, 2004	MDU	S	1,300	$24.94	$32,422	49,732 Direct	-2.55%	Disposed	226.0% (price as of 2026-08-20)
Aug. 19, 2004	MDU	S	1,400	$24.93	$34,902	51,032 Direct	-2.67%	Disposed	226.1% (price as of 2026-08-20)
Aug. 19, 2004	MDU	S	400	$24.92	$9,968	52,432 Direct	-0.76%	Disposed	226.3% (price as of 2026-08-20)
Aug. 19, 2004	MDU	S	2,100	$24.91	$52,311	52,832 Direct	-3.82%	Disposed	226.4% (price as of 2026-08-20)
Aug. 19, 2004	MDU	S	9,400	$24.90	$234,060	54,932 Direct	-14.61%	Disposed	226.5% (price as of 2026-08-20)
Aug. 19, 2004	MDU	S	6,300	$24.85	$156,555	64,332 Direct	-8.92%	Disposed	227.2% (price as of 2026-08-20)
Aug. 19, 2004	MDU	M	23,000	$19.83	$456,090	70,632 Direct	+48.29%	Acquired	310.0% (price as of 2026-08-20)
Feb. 12, 2004	MDU	F	1,345	$23.72	$31,903	46,978 Direct	-2.78%	Disposed	242.8% (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
Nov. 22, 2004	MDU	Empl.Stock Opt.(Right to Buy)	Common Stock (20,000)	$19.83	Feb. 15, 2011	20,000	Disposed
Nov. 22, 2004	MDU	Empl.Stock Opt.(Right to Buy)	Common Stock (25,000)	$19.83	Feb. 15, 2011	25,000	Disposed
Nov. 22, 2004	MDU	Empl.Stock Opt.(Right to Buy)	Common Stock (25,000)	$19.83	Feb. 15, 2011	25,000	Disposed
Aug. 23, 2004	MDU	Empl.Stock Opt.(Right to Buy)	Common Stock (1,100)	$19.83	Feb. 15, 2011	1,100	Disposed
Aug. 20, 2004	MDU	Empl.Stock Opt.(Right to Buy)	Common Stock (400)	$19.83	Feb. 15, 2011	400	Disposed
Aug. 19, 2004	MDU	Empl.Stock Opt.(Right to Buy)	Common Stock (23,000)	$19.83	Feb. 15, 2011	23,000	Disposed

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

Compensation (DEF 14A)

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

MDU

President— Administration(10)

Fiscal year	Salary	Bonus	Stock awards	Option awards	Non-equity incentive	Pension change	Other	Total
2006	$311,667	—	$323,641	—	$299,212	$43,845	$6,876	$985,241

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