ISENBERG EUGENE M

Insider

First SEC filing: Feb. 10, 2011 · Latest: Feb. 10, 2011

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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

NBR selling March 16, 2005

Insider transactions

0 buys (P) 0 sells (S) Net: $0 + 43 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

43 other filings hidden

Date	Ticker	Code	Shares	Price	Value	Owned after	Δ own	A/D	vs now
Jan. 20, 2012	NBR	M	3,800,000	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
Jan. 20, 2012	NBR	F	3,299,527	$17.01	$56,124,954	8,082,484 Direct	-28.99%	Disposed	-89.2% (price as of 2026-08-20)
Jan. 20, 2012	NBR	M	3,800,000	$13.52	$51,376,000	11,382,011 Direct	+50.12%	Acquired	-86.4% (price as of 2026-08-20)
Dec. 2, 2010	NBR	M	2,000,000	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
Dec. 2, 2010	NBR	F	1,980,491	$23.13	$45,808,757	7,963,611 Direct	-19.92%	Disposed	-92.1% (price as of 2026-08-20)
Dec. 2, 2010	NBR	M	2,000,000	$22.78	$45,560,000	9,944,102 Direct	+25.18%	Acquired	-91.9% (price as of 2026-08-20)
March 23, 2010	NBR	M	225,000	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
March 23, 2010	NBR	F	222,124	$19.39	$4,306,984	7,944,102 Direct	-2.72%	Disposed	-90.5% (price as of 2026-08-20)
March 23, 2010	NBR	M	225,000	$19.00	$4,275,000	8,166,226 Direct	+2.83%	Acquired	-90.3% (price as of 2026-08-20)
Feb. 25, 2009	NBR	A	3,000,000	$9.87	$29,610,000	3,000,000 Direct	—	Acquired	-81.4% (price as of 2026-08-20)
Dec. 31, 2008	NBR	F	27,976	$11.55	$323,123	7,941,226 Direct	-0.35%	Disposed	-84.1% (price as of 2026-08-20)
Oct. 23, 2008	NBR	A	2,078,900	—	—	7,969,202 Direct	+35.29%	Acquired	(price as of 2026-08-20)
Oct. 23, 2008	NBR	A	2,606,452	—	—	8,496,754 Direct	+44.25%	Acquired	(price as of 2026-08-20)
Sept. 30, 2008	NBR	F	27,977	$23.26	$650,745	5,890,302 Direct	-0.47%	Disposed	-92.1% (price as of 2026-08-20)
June 30, 2008	NBR	F	27,976	$49.41	$1,382,294	5,918,279 Direct	-0.47%	Disposed	-96.3% (price as of 2026-08-20)
March 31, 2008	NBR	F	27,766	$33.39	$927,107	5,946,255 Direct	-0.46%	Disposed	-94.5% (price as of 2026-08-20)
Feb. 29, 2008	NBR	F	24,105	$32.47	$782,689	5,974,021 Direct	-0.40%	Disposed	-94.3% (price as of 2026-08-20)
Feb. 24, 2008	NBR	F	24,105	$30.90	$744,844	5,998,126 Direct	-0.40%	Disposed	-94.1% (price as of 2026-08-20)
Feb. 22, 2008	NBR	A	921,100	—	—	6,022,231 Direct	+18.06%	Acquired	(price as of 2026-08-20)
Jan. 31, 2008	NBR	F	76,908	$26.78	$2,059,596	5,101,131 Direct	-1.49%	Disposed	-93.1% (price as of 2026-08-20)
Sept. 11, 2007	NBR	M	4,872,678	$23.25	$113,289,764	0 Direct	-100.00%	Disposed	-92.1% (price as of 2026-08-20)
Sept. 11, 2007	NBR	F	4,142,812	$30.42	$126,024,341	5,178,039 Direct	-44.45%	Disposed	-94.0% (price as of 2026-08-20)
Sept. 11, 2007	NBR	M	4,872,678	$23.25	$113,289,764	9,320,851 Direct	+109.54%	Acquired	-92.1% (price as of 2026-08-20)
Jan. 31, 2007	NBR	A	699,637	$30.28	$21,185,008	4,448,173 Direct	+18.66%	Acquired	-93.9% (price as of 2026-08-20)
Feb. 28, 2006	NBR	A	100,000	$65.95	$6,595,000	1,874,268 Direct	+5.64%	Acquired	-94.4% (price as of 2026-08-20)
Dec. 5, 2005	NBR	A	1,333,333	$71.61	$95,479,976	1,333,333 Direct	—	Acquired	-94.9% (price as of 2026-08-20)
March 16, 2005	NBR	M	573,693	$12.50	$7,171,162	2,347,961 Direct	+32.33%	Acquired	-70.6% (price as of 2026-08-20)
March 16, 2005	NBR	M	300,000	$12.50	$3,750,000	2,647,961 Direct	+12.78%	Acquired	-70.6% (price as of 2026-08-20)
March 16, 2005	NBR	M	733,246	$12.50	$9,165,575	3,381,207 Direct	+27.69%	Acquired	-70.6% (price as of 2026-08-20)
March 16, 2005	NBR	M	435,750	$12.50	$5,446,875	3,816,957 Direct	+12.89%	Acquired	-70.6% (price as of 2026-08-20)
March 16, 2005	NBR	M	966,051	$12.50	$12,075,638	4,783,008 Direct	+25.31%	Acquired	-70.6% (price as of 2026-08-20)
March 16, 2005	NBR	M	337,500	$12.50	$4,218,750	5,120,508 Direct	+7.06%	Acquired	-70.6% (price as of 2026-08-20)
March 16, 2005	NBR	M	1,500,000	$24.75	$37,125,000	6,620,508 Direct	+29.29%	Acquired	-85.2% (price as of 2026-08-20)
March 16, 2005	NBR	S	4,846,240	$56.18	$272,261,763	1,774,268 Direct	-73.20%	Disposed	-93.5% (price as of 2026-08-20)
March 16, 2005	NBR	M	435,750	$12.50	$5,446,875	0 Direct	-100.00%	Disposed	-70.6% (price as of 2026-08-20)
March 16, 2005	NBR	M	573,693	$12.50	$7,171,162	0 Direct	-100.00%	Disposed	-70.6% (price as of 2026-08-20)
March 16, 2005	NBR	M	300,000	$12.50	$3,750,000	0 Direct	-100.00%	Disposed	-70.6% (price as of 2026-08-20)
March 16, 2005	NBR	M	733,246	$12.50	$9,165,575	0 Direct	-100.00%	Disposed	-70.6% (price as of 2026-08-20)
March 16, 2005	NBR	M	966,051	$12.50	$12,075,638	0 Direct	-100.00%	Disposed	-70.6% (price as of 2026-08-20)
March 16, 2005	NBR	M	337,500	$12.50	$4,218,750	0 Direct	-100.00%	Disposed	-70.6% (price as of 2026-08-20)
March 16, 2005	NBR	M	1,500,000	$24.75	$37,125,000	0 Direct	-100.00%	Disposed	-85.2% (price as of 2026-08-20)
Feb. 24, 2005	NBR	A	350,000	$57.65	$20,177,500	350,000 Direct	—	Acquired	-93.6% (price as of 2026-08-20)
Feb. 24, 2005	NBR	A	100,000	$57.65	$5,765,000	1,774,268 Direct	+5.97%	Acquired	-93.6% (price as of 2026-08-20)
Feb. 20, 2004	NBR	A	950,000	$45.91	$43,614,500	950,000 Direct	—	Acquired	-92.0% (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
Jan. 20, 2012	NBR	Stock Options (Right to Buy)	Common Stock (3,800,000)	$13.52	Jan. 22, 2012	3,800,000	Disposed
Dec. 2, 2010	NBR	Stock Options (Right to Buy)	Common Stock (2,000,000)	$22.78	Dec. 4, 2010	2,000,000	Disposed
March 23, 2010	NBR	Stock Options (Right to Buy)	Common Stock (225,000)	$19.00	March 23, 2010	225,000	Disposed
Feb. 25, 2009	NBR	Stock Options (Right to Buy)	Common Stock (3,000,000)	$9.87	Feb. 25, 2019	3,000,000	Acquired
Sept. 11, 2007	NBR	Stock Options (Right to buy)	Common Stock (4,872,678)	$23.25	Sept. 11, 2007	4,872,678	Disposed
Dec. 5, 2005	NBR	Stock Options (Right to buy)	Common Stock (1,333,333)	$71.61	Dec. 5, 2015	1,333,333	Acquired
March 16, 2005	NBR	Stock Options (Right to buy)	Common Stock (435,750)	$12.50	Dec. 12, 2006	435,750	Disposed
March 16, 2005	NBR	Stock Options (Right to buy)	Common Stock (573,693)	$12.50	Jan. 9, 2008	573,693	Disposed
March 16, 2005	NBR	Stock Options (Right to buy)	Common Stock (300,000)	$12.50	Dec. 12, 2006	300,000	Disposed
March 16, 2005	NBR	Stock Options (Right to buy)	Common Stock (733,246)	$12.50	July 22, 2007	733,246	Disposed
March 16, 2005	NBR	Stock Options (Right to buy)	Common Stock (966,051)	$12.50	Jan. 9, 2008	966,051	Disposed
March 16, 2005	NBR	Stock Options (Right to buy)	Common Stock (337,500)	$12.50	Dec. 12, 2006	337,500	Disposed
March 16, 2005	NBR	Stock Options (Right to buy)	Common Stock (1,500,000)	$24.75	Dec. 7, 2009	1,500,000	Disposed
Feb. 24, 2005	NBR	Stock Options (Right to buy)	Common Stock (350,000)	$57.65	Feb. 24, 2015	350,000	Acquired
Feb. 20, 2004	NBR	Stock Options (Right to buy)	Common Stock (950,000)	$45.91	Feb. 20, 2014	950,000	Acquired

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