Alexander M Knaster

Insider

First SEC filing: Nov. 14, 2008 · Latest: Nov. 14, 2008

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

NBR buying Nov. 13, 2008

Insider transactions

0 buys (P) 0 sells (S) Net: $0 + 6 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

6 other filings hidden

Date	Ticker	Code	Shares	Price	Value	Owned after	Δ own	A/D	vs now
Nov. 13, 2008	NBR	P	10,000	$13.50	$135,000	334,000 Direct	+3.09%	Acquired	-86.1% (price as of 2026-08-19)
Nov. 13, 2008	NBR	P	10,000	$13.10	$131,000	324,000 Direct	+3.18%	Acquired	-85.6% (price as of 2026-08-19)
Nov. 13, 2008	NBR	P	10,000	$12.85	$128,500	314,000 Direct	+3.29%	Acquired	-85.3% (price as of 2026-08-19)
Nov. 12, 2008	NBR	P	30,000	$13.75	$412,500	304,000 Direct	+10.95%	Acquired	-86.3% (price as of 2026-08-19)
Oct. 30, 2008	NBR	P	10,000	$13.93	$139,300	299,000 Direct	+3.46%	Acquired	-86.5% (price as of 2026-08-19)
Oct. 30, 2008	NBR	P	19,400	$13.75	$266,750	289,000 Direct	+7.20%	Acquired	-86.3% (price as of 2026-08-19)
Oct. 30, 2008	NBR	P	400	$13.75	$5,500	269,600 Direct	+0.15%	Acquired	-86.3% (price as of 2026-08-19)
Oct. 30, 2008	NBR	P	200	$13.75	$2,750	269,200 Direct	+0.07%	Acquired	-86.3% (price as of 2026-08-19)
Oct. 30, 2008	NBR	P	10,000	$13.72	$137,200	269,000 Direct	+3.86%	Acquired	-86.3% (price as of 2026-08-19)
Oct. 14, 2008	NBR	D	25,000	—	—	234,000 Direct	-9.65%	Disposed	(price as of 2026-08-19)
Feb. 22, 2008	NBR	A	12,000	—	—	259,000 Direct	+4.86%	Acquired	(price as of 2026-08-19)
Feb. 22, 2007	NBR	A	12,000	—	—	247,000 Direct	+5.11%	Acquired	(price as of 2026-08-19)
March 10, 2006	NBR	A	7,500	$63.90	$479,250	117,500 Direct	+6.82%	Acquired	-94.1% (price as of 2026-08-19)
Aug. 23, 2005	NBR	P	3,700	$63.33	$234,321	110,000 Direct	+3.48%	Acquired	-94.1% (price as of 2026-08-19)
Aug. 22, 2005	NBR	P	18,700	$63.19	$1,181,653	106,300 Direct	+21.35%	Acquired	-94.0% (price as of 2026-08-19)
June 7, 2005	NBR	A	10,000	$56.87	$568,700	87,600 Direct	+12.89%	Acquired	-93.4% (price as of 2026-08-19)
May 23, 2005	NBR	P	17,600	$52.50	$924,000	77,600 Direct	+29.33%	Acquired	-92.8% (price as of 2026-08-19)
May 19, 2005	NBR	P	10,000	$51.50	$515,000	60,000 Direct	+20.00%	Acquired	-92.7% (price as of 2026-08-19)
May 18, 2005	NBR	P	20,000	$51.15	$1,023,000	50,000 Direct	+66.67%	Acquired	-92.6% (price as of 2026-08-19)
May 16, 2005	NBR	P	30,000	$51.27	$1,538,100	30,000 Direct	—	Acquired	-92.7% (price as of 2026-08-19)
Nov. 9, 2004	NBR	A	30,000	$47.03	$1,410,900	30,000 Direct	—	Acquired	-92.0% (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
Nov. 9, 2004	NBR	Stock Options (Right to buy)	Common Stock (30,000)	$47.03	Nov. 9, 2014	30,000	Acquired

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