There is a long list of 195 institutional holders of NBR within the last two holding periods in our database of 13F filers, so we've sorted through to present to you just the top 50 institutional holders of NBR by largest to smallest position reported in the institutional investor's latest 13F filing. In the institutional-holders-of-NBR table below, the initial column indicates the name of each top institutional holder of NBR, with a link to that fund's top holdings. The next columns indicate the amount of NBR stock held by each of the institutional holders of NBR, followed by the NBR position size held by the institution, and finally the date of the quarterly 13F filing period the holdings data represents for that institution.

Holder	Amount	Position Size ($ in 1000's)	As of
BlackRock Inc.	1,477,766	$120,630	12/31/2023
NBR	1,477,766	$120,630	12/31/2023
Vanguard Group Inc.	779,035	$63,593	12/31/2023
NBR	779,035	$63,593	12/31/2023
State Street Corp	512,993	$41,876	12/31/2023
NBR	512,993	$41,876	12/31/2023
Goldman Sachs Group Inc.	397,102	$32,415	12/31/2023
NBR	397,102	$32,415	12/31/2023
Gendell Jeffrey L	396,301	$32,350	12/31/2023
NBR	396,301	$32,350	12/31/2023
Dimensional Fund Advisors LP	295,256	$24,102	12/31/2023
NBR	295,256	$24,102	12/31/2023
Van ECK Associates Corp	214,415	$17,503	12/31/2023
NBR	214,415	$17,503	12/31/2023
Apollo Management Holdings L.P.	203,601	$16,620	12/31/2023
NBR	203,601	$16,620	12/31/2023
Geode Capital Management LLC	188,745	$15,409	12/31/2023
NBR	188,745	$15,409	12/31/2023
Morgan Stanley	186,742	$15,244	12/31/2023
NBR	186,742	$15,244	12/31/2023
Charles Schwab Investment Management Inc.	181,613	$14,825	12/31/2023
NBR	181,613	$14,825	12/31/2023
Invesco Ltd.	167,169	$13,646	12/31/2023
NBR	167,169	$13,646	12/31/2023
Contrarius Investment Management Ltd	140,626	$11,479	12/31/2023
NBR	140,626	$11,479	12/31/2023
American Century Companies Inc.	137,525	$11,226	12/31/2023
NBR	137,525	$11,226	12/31/2023
Tejara Capital Ltd	132,925	$10,851	12/31/2023
NBR	132,925	$10,851	12/31/2023
Marshall Wace LLP	113,103	$9,233	12/31/2023
NBR	113,103	$9,233	12/31/2023
Northern Trust Corp	101,707	$8,302	12/31/2023
NBR	101,707	$8,302	12/31/2023
Susquehanna International Group LLP		$8,067	12/31/2023
Call	221,600	$18,089	12/31/2023
Put	139,900	$11,420	12/31/2023
NBR	17,122	$1,398	12/31/2023
Two Sigma Advisers LP	92,200	$7,526	12/31/2023
NBR	92,200	$7,526	12/31/2023
Bank of New York Mellon Corp	77,857	$6,355	12/31/2023
NBR	77,857	$6,355	12/31/2023
Pantechnicon Advisors LLP	75,000	$6,122	12/31/2023
NBR	75,000	$6,122	12/31/2023
Hara Capital LLC	70,050	$5,718	12/31/2023
NBR	70,050	$5,718	12/31/2023
Miller Value Partners LLC	65,611	$5,356	12/31/2023
NBR	65,611	$5,356	12/31/2023
Millennium Management LLC	61,292	$5,003	12/31/2023
NBR	61,292	$5,003	12/31/2023
Citadel Advisors LLC		$4,876	12/31/2023
Put	84,800	$6,922	12/31/2023
NBR	75,234	$6,141	12/31/2023
Call	69,300	$5,657	12/31/2023
ExodusPoint Capital Management LP	56,978	$4,651	12/31/2023
NBR	56,978	$4,651	12/31/2023
Canada Pension Plan Investment Board	56,300	$4,596	12/31/2023
NBR	56,300	$4,596	12/31/2023
Renaissance Technologies LLC	51,400	$4,196	12/31/2023
NBR	51,400	$4,196	12/31/2023
Principal Financial Group Inc.	46,308	$3,780	12/31/2023
NBR	46,308	$3,780	12/31/2023
Ameriprise Financial Inc.	37,503	$3,061	12/31/2023
NBR	37,503	$3,061	12/31/2023
Lombard Odier Asset Management USA Corp		$2,931	12/31/2023
NBR	24,400	$1,992	12/31/2023
Call	11,500	$939	12/31/2023
First Trust Advisors LP	33,032	$2,696	12/31/2023
NBR	33,032	$2,696	12/31/2023
Wells Fargo & Company MN		$2,692	12/31/2023
NBR	23,977	$1,957	12/31/2023
Call	9,000	$735	12/31/2023
Rhumbline Advisers	32,389	$2,644	12/31/2023
NBR	32,389	$2,644	12/31/2023
Jane Street Group LLC		$2,609	12/31/2023
NBR	60,457	$4,935	12/31/2023
Put	50,500	$4,122	12/31/2023
Call	22,000	$1,796	12/31/2023
Elm Ridge Management LLC	30,374	$2,479	12/31/2023
NBR	30,374	$2,479	12/31/2023
Hartree Partners LP	28,310	$2,311	12/31/2023
NBR	28,310	$2,311	12/31/2023
CIBC World Markets Inc.	28,265	$2,307	12/31/2023
NBR	28,265	$2,307	12/31/2023
Nuveen Asset Management LLC	28,095	$2,293	12/31/2023
NBR	28,095	$2,293	12/31/2023
Readystate Asset Management LP	26,499	$2,163	12/31/2023
NBR	26,499	$2,163	12/31/2023
Credit Suisse AG	25,601	$2,090	12/31/2023
NBR	25,601	$2,090	12/31/2023
Legal & General Group Plc	25,586	$2,089	12/31/2023
NBR	25,586	$2,089	12/31/2023
GSA Capital Partners LLP	25,535	$2,084	12/31/2023
NBR	25,535	$2,084	12/31/2023
Tudor Investment Corp Et Al	24,200	$1,975	12/31/2023
NBR	24,200	$1,975	12/31/2023
Two Sigma Investments LP		$1,876	12/31/2023
NBR	137,185	$11,198	12/31/2023
Put	114,200	$9,322	12/31/2023
Public Sector Pension Investment Board		$1,862	12/31/2023
NBR	18,464	$1,507	12/31/2023
Call	4,346	$355	12/31/2023
Resources Investment Advisors LLC.	22,365	$1,826	12/31/2023
NBR	22,365	$1,826	12/31/2023
Voloridge Investment Management LLC	21,599	$1,763	12/31/2023
NBR	21,599	$1,763	12/31/2023
Barclays PLC	20,736	$1,693	12/31/2023
NBR	20,736	$1,693	12/31/2023
Susquehanna Portfolio Strategies LLC	19,467	$1,589	12/31/2023
NBR	19,467	$1,589	12/31/2023