There is a long list of 219 institutional holders of GMAB 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 GMAB by largest to smallest position reported in the institutional investor's latest 13F filing. In the institutional-holders-of-GMAB table below, the initial column indicates the name of each top institutional holder of GMAB, with a link to that fund's top holdings. The next columns indicate the amount of GMAB stock held by each of the institutional holders of GMAB, followed by the GMAB 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
Alliancebernstein L.P.	15,614,510	$497,166	12/31/2023
GMAB	15,614,510	$497,166	12/31/2023
BlackRock Inc.	4,409,575	$140,401	12/31/2023
GMAB	4,409,575	$140,401	12/31/2023
Capital International Investors	4,057,922	$129,651	12/31/2023
GMAB	4,057,922	$129,651	12/31/2023
Harding Loevner LP	3,289,895	$97,569	12/31/2023
GMAB	3,289,895	$97,569	12/31/2023
Wellington Management Group LLP	2,369,331	$75,439	12/31/2023
GMAB	2,369,331	$75,439	12/31/2023
Renaissance Technologies LLC	1,494,800	$47,594	12/31/2023
GMAB	1,494,800	$47,594	12/31/2023
First Trust Advisors LP	1,270,095	$40,440	12/31/2023
GMAB	1,270,095	$40,440	12/31/2023
Morgan Stanley	1,089,097	$34,677	12/31/2023
GMAB	1,089,097	$34,677	12/31/2023
Envestnet Asset Management Inc.	925,918	$29,481	12/31/2023
GMAB	925,918	$29,481	12/31/2023
Bank of America Corp DE	889,164	$28,311	12/31/2023
GMAB	889,164	$28,311	12/31/2023
Stifel Financial Corp	672,893	$21,425	12/31/2023
GMAB	672,893	$21,425	12/31/2023
Royal Bank of Canada	640,989	$20,409	12/31/2023
GMAB	640,989	$20,409	12/31/2023
Wells Fargo & Company MN	557,132	$17,739	12/31/2023
GMAB	557,132	$17,739	12/31/2023
Northern Trust Corp	539,030	$17,163	12/31/2023
GMAB	539,030	$17,163	12/31/2023
Goldman Sachs Group Inc.	527,924	$16,809	12/31/2023
GMAB	527,924	$16,809	12/31/2023
Millennium Management LLC	512,281	$16,311	12/31/2023
GMAB	512,281	$16,311	12/31/2023
Hardman Johnston Global Advisors LLC	482,657	$15,368	12/31/2023
GMAB	482,657	$15,368	12/31/2023
American Century Companies Inc.	456,422	$14,532	12/31/2023
GMAB	456,422	$14,532	12/31/2023
FMR LLC	267,505	$8,517	12/31/2023
GMAB	267,505	$8,517	12/31/2023
Qube Research & Technologies Ltd	257,116	$8,187	12/31/2023
GMAB	257,116	$8,187	12/31/2023
Royal London Asset Management Ltd.	227,054	$7,229	12/31/2023
GMAB	227,054	$7,229	12/31/2023
Natixis Advisors L.P.	235,974	$7,058	03/31/2024
GMAB	235,974	$7,058	03/31/2024
Marshall Wace LLP	215,408	$6,859	12/31/2023
GMAB	215,408	$6,859	12/31/2023
Cubist Systematic Strategies LLC	212,446	$6,764	12/31/2023
GMAB	212,446	$6,764	12/31/2023
Price T Rowe Associates Inc. MD	189,491	$6,034	12/31/2023
GMAB	189,491	$6,034	12/31/2023
ANTIPODES PARTNERS Ltd	185,698	$5,912	12/31/2023
GMAB	185,698	$5,912	12/31/2023
Oppenheimer Asset Management Inc.	183,653	$5,848	12/31/2023
GMAB	183,653	$5,848	12/31/2023
The PNC Financial Services Group Inc.	165,187	$5,260	12/31/2023
GMAB	165,187	$5,260	12/31/2023
Citadel Advisors LLC		$5,236	12/31/2023
GMAB	155,521	$4,952	12/31/2023
Call	11,700	$373	12/31/2023
Put	2,800	$89	12/31/2023
Folketrygdfondet	170,385	$5,096	03/31/2024
GMAB	170,385	$5,096	03/31/2024
US Bancorp DE	159,078	$5,065	12/31/2023
GMAB	159,078	$5,065	12/31/2023
Raymond James & Associates	166,365	$4,976	03/31/2024
GMAB	166,365	$4,976	03/31/2024
Trexquant Investment LP	153,098	$4,875	12/31/2023
GMAB	153,098	$4,875	12/31/2023
Williams Jones Wealth Management LLC.	150,137	$4,780	12/31/2023
GMAB	150,137	$4,780	12/31/2023
Bamco Inc. NY	138,945	$4,424	12/31/2023
GMAB	138,945	$4,424	12/31/2023
JPMorgan Chase & Co.	135,903	$4,327	12/31/2023
GMAB	135,903	$4,327	12/31/2023
Voloridge Investment Management LLC	135,450	$4,313	12/31/2023
GMAB	135,450	$4,313	12/31/2023
Schroder Investment Management Group	127,300	$4,053	12/31/2023
GMAB	127,300	$4,053	12/31/2023
NewEdge Wealth LLC	119,989	$3,820	12/31/2023
GMAB	119,989	$3,820	12/31/2023
Torray LLC	107,201	$3,413	12/31/2023
GMAB	107,201	$3,413	12/31/2023
Point72 Asset Management L.P.	101,100	$3,219	12/31/2023
GMAB	101,100	$3,219	12/31/2023
Kayne Anderson Rudnick Investment Management LLC	97,218	$3,095	12/31/2023
GMAB	97,218	$3,095	12/31/2023
Hudson Bay Capital Management LP	95,000	$3,025	12/31/2023
GMAB	95,000	$3,025	12/31/2023
Dimensional Fund Advisors LP	93,556	$2,979	12/31/2023
GMAB	93,556	$2,979	12/31/2023
LPL Financial LLC	84,160	$2,680	12/31/2023
GMAB	84,160	$2,680	12/31/2023
Synovus Financial Corp	78,981	$2,515	12/31/2023
GMAB	78,981	$2,515	12/31/2023
MML Investors Services LLC	75,090	$2,391	12/31/2023
GMAB	75,090	$2,391	12/31/2023
QRG Capital Management Inc.	71,152	$2,265	12/31/2023
GMAB	71,152	$2,265	12/31/2023
Crossmark Global Holdings Inc.	67,675	$2,155	12/31/2023
GMAB	67,675	$2,155	12/31/2023
Bank of Montreal Can	63,805	$2,041	12/31/2023
GMAB	63,805	$2,041	12/31/2023