There is a long list of 338 institutional holders of NOG 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 NOG by largest to smallest position reported in the institutional investor's latest 13F filing. In the institutional-holders-of-NOG table below, the initial column indicates the name of each top institutional holder of NOG, with a link to that fund's top holdings. The next columns indicate the amount of NOG stock held by each of the institutional holders of NOG, followed by the NOG 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.		$512,615	12/31/2023
NOG	13,713,823	$508,371	12/31/2023
NOTE 3	3,600,000	$4,244	12/31/2023
FMR LLC		$400,660	12/31/2023
NOG	9,753,290	$361,554	12/31/2023
NOTE 3	33,169,000	$39,106	12/31/2023
Vanguard Group Inc.	10,587,536	$392,480	12/31/2023
NOG	10,587,536	$392,480	12/31/2023
State Street Corp		$213,691	12/31/2023
NOG	5,370,230	$201,231	12/31/2023
NOTE 3	10,500,000	$12,460	12/31/2023
Invesco Ltd.		$183,665	12/31/2023
NOG	3,903,192	$144,691	12/31/2023
NOTE 3	33,057,000	$38,974	12/31/2023
American Century Companies Inc.	3,837,280	$142,248	12/31/2023
NOG	3,837,280	$142,248	12/31/2023
Copeland Capital Management LLC	2,217,989	$88,010	03/31/2024
NOG	2,217,989	$88,010	03/31/2024
Westwood Holdings Group Inc.		$87,562	12/31/2023
NOG	2,133,847	$79,102	12/31/2023
NOTE 3	7,115,000	$8,460	12/31/2023
Adage Capital Partners GP L.L.C.	2,112,361	$78,305	12/31/2023
NOG	2,112,361	$78,305	12/31/2023
Geode Capital Management LLC	1,880,013	$69,701	12/31/2023
NOG	1,880,013	$69,701	12/31/2023
Loomis Sayles & Co. L P		$63,649	12/31/2023
NOG	915,234	$33,928	12/31/2023
CV BND	801,761	$29,721	12/31/2023
Westfield Capital Management Co. LP	1,537,719	$57,003	12/31/2023
NOG	1,537,719	$57,003	12/31/2023
Allspring Global Investments Holdings LLC	1,432,704	$56,850	03/31/2024
NOG	1,432,704	$56,850	03/31/2024
Bank of New York Mellon Corp		$54,676	12/31/2023
NOG	1,452,623	$53,849	12/31/2023
NOTE	700,000	$827	12/31/2023
Nuveen Asset Management LLC	1,408,315	$52,423	12/31/2023
NOG	1,408,315	$52,423	12/31/2023
Principal Financial Group Inc.	1,406,354	$52,134	12/31/2023
NOG	1,406,354	$52,134	12/31/2023
Dimensional Fund Advisors LP	1,375,710	$51,001	12/31/2023
NOG	1,375,710	$51,001	12/31/2023
Morgan Stanley		$46,946	12/31/2023
NOG	1,213,872	$44,998	12/31/2023
NOTE 3	1,670,000	$1,948	12/31/2023
Ameriprise Financial Inc.		$43,240	12/31/2023
NOG	880,246	$32,632	12/31/2023
CONV BND	9,000,000	$10,608	12/31/2023
Alliancebernstein L.P.	1,139,768	$42,251	12/31/2023
NOG	1,139,768	$42,251	12/31/2023
Palisade Capital Management LLC NJ		$41,971	12/31/2023
NOG	1,074,887	$39,846	12/31/2023
NOTE 3	1,800,000	$2,125	12/31/2023
Goldman Sachs Group Inc.		$41,684	12/31/2023
NOG	1,067,211	$39,562	12/31/2023
CNV	1,800,000	$2,122	12/31/2023
Northern Trust Corp	1,104,441	$40,942	12/31/2023
NOG	1,104,441	$40,942	12/31/2023
Requisite Capital Management LLC		$33,455	03/31/2024
NOG	814,943	$32,663	03/31/2024
Call	360,000	$792	03/31/2024
Royal Bank of Canada		$30,732	12/31/2023
NOG	396,012	$14,679	12/31/2023
NOTE 3	10,786,000	$12,717	12/31/2023
Call	90,000	$3,336	12/31/2023
Millennium Management LLC		$28,957	12/31/2023
NOG	882,438	$32,712	12/31/2023
Put	101,300	$3,755	12/31/2023
Hood River Capital Management LLC	778,738	$28,868	12/31/2023
NOG	778,738	$28,868	12/31/2023
Victory Capital Management Inc.	757,659	$28,086	12/31/2023
NOG	757,659	$28,086	12/31/2023
Susquehanna International Group LLP		$28,012	12/31/2023
NOTE 3	11,891,000	$14,047	12/31/2023
Call	326,800	$12,114	12/31/2023
NOG	180,049	$6,674	12/31/2023
Put	130,100	$4,823	12/31/2023
Bank of America Corp DE	744,906	$27,614	12/31/2023
NOG	744,906	$27,614	12/31/2023
Citadel Advisors LLC		$27,435	12/31/2023
Call	367,900	$13,638	12/31/2023
NOTE 3	10,900,000	$12,881	12/31/2023
NOG	166,004	$6,154	12/31/2023
Put	141,300	$5,238	12/31/2023
Silvercrest Asset Management Group LLC	736,854	$27,315	12/31/2023
NOG	736,854	$27,315	12/31/2023
Charles Schwab Investment Management Inc.	734,485	$27,227	12/31/2023
NOG	734,485	$27,227	12/31/2023
SIR Capital Management L.P.	691,323	$25,627	12/31/2023
NOG	691,323	$25,627	12/31/2023
New York State Common Retirement Fund	660,120	$24,471	12/31/2023
NOG	660,120	$24,471	12/31/2023
JPMorgan Chase & Co.		$24,170	12/31/2023
NOG	645,647	$23,934	12/31/2023
BOND	200,000	$236	12/31/2023
Wells Fargo & Company MN		$23,673	12/31/2023
NOG	590,366	$21,885	12/31/2023
NOTE 3	1,514,000	$1,788	12/31/2023
Putnam Investments LLC		$22,097	12/31/2023
NOG	448,273	$16,617	12/31/2023
CONV	4,648,000	$5,480	12/31/2023
Sei Investments Co.		$21,913	12/31/2023
NOG	587,502	$21,779	12/31/2023
NOTE 3	114,000	$134	12/31/2023
Tributary Capital Management LLC	547,595	$21,729	03/31/2024
NOG	547,595	$21,729	03/31/2024
Raymond James & Associates	560,914	$20,793	12/31/2023
NOG	560,914	$20,793	12/31/2023
Steward Partners Investment Advisory LLC	549,564	$20,372	12/31/2023
NOG	549,564	$20,372	12/31/2023
Nomura Holdings Inc.		$18,698	12/31/2023
NOG	375,725	$13,928	12/31/2023
NOTE 3	128,679	$4,770	12/31/2023
Voya Investment Management LLC	497,440	$18,440	12/31/2023
NOG	497,440	$18,440	12/31/2023
Two Sigma Investments LP		$18,020	12/31/2023
NOTE 3	27,930,000	$32,929	12/31/2023
Put	487,700	$18,079	12/31/2023
NOG	85,522	$3,170	12/31/2023
Jane Street Group LLC		$17,816	12/31/2023
Call	237,800	$8,815	12/31/2023
NOG	161,782	$5,997	12/31/2023
NOTE 3	4,904,000	$5,784	12/31/2023
Put	75,000	$2,780	12/31/2023
Emerald Advisers LLC	476,248	$17,655	12/31/2023
NOG	476,248	$17,655	12/31/2023
Aventail Capital Group LP	462,772	$17,155	12/31/2023
NOG	462,772	$17,155	12/31/2023
Wellington Management Group LLP	461,090	$17,093	12/31/2023
NOG	461,090	$17,093	12/31/2023
Ninepoint Partners LP	450,000	$16,682	12/31/2023
NOG	450,000	$16,682	12/31/2023