There is a long list of 342 institutional holders of IRDM 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 IRDM by largest to smallest position reported in the institutional investor's latest 13F filing. In the institutional-holders-of-IRDM table below, the initial column indicates the name of each top institutional holder of IRDM, with a link to that fund's top holdings. The next columns indicate the amount of IRDM stock held by each of the institutional holders of IRDM, followed by the IRDM 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
Bamco Inc. NY	14,045,775	$578,124	12/31/2023
IRDM	14,045,775	$578,124	12/31/2023
Vanguard Group Inc.	11,753,337	$483,767	12/31/2023
IRDM	11,753,337	$483,767	12/31/2023
BlackRock Inc.	11,379,311	$468,372	12/31/2023
IRDM	11,379,311	$468,372	12/31/2023
Capital International Investors	7,403,313	$304,720	12/31/2023
IRDM	7,403,313	$304,720	12/31/2023
State Street Corp	4,290,627	$176,602	12/31/2023
IRDM	4,290,627	$176,602	12/31/2023
Van Berkom & Associates Inc.	2,735,294	$112,585	12/31/2023
IRDM	2,735,294	$112,585	12/31/2023
Silver Heights Capital Management Inc	2,656,227	$109,330	12/31/2023
IRDM	2,656,227	$109,330	12/31/2023
Clearbridge Investments LLC	2,266,706	$93,298	12/31/2023
IRDM	2,266,706	$93,298	12/31/2023
Geode Capital Management LLC	2,039,614	$83,963	12/31/2023
IRDM	2,039,614	$83,963	12/31/2023
Dimensional Fund Advisors LP	1,927,109	$79,321	12/31/2023
IRDM	1,927,109	$79,321	12/31/2023
Northern Trust Corp	1,796,495	$73,944	12/31/2023
IRDM	1,796,495	$73,944	12/31/2023
Sumitomo Mitsui Trust Holdings Inc.	1,743,482	$71,762	12/31/2023
IRDM	1,743,482	$71,762	12/31/2023
Nikko Asset Management Americas Inc.	1,743,482	$71,762	12/31/2023
IRDM	1,743,482	$71,762	12/31/2023
Invesco Ltd.	1,678,832	$69,101	12/31/2023
IRDM	1,678,832	$69,101	12/31/2023
ARK Investment Management LLC	2,573,180	$67,314	03/31/2024
IRDM	2,573,180	$67,314	03/31/2024
Capital World Investors	1,563,868	$64,369	12/31/2023
IRDM	1,563,868	$64,369	12/31/2023
ArrowMark Colorado Holdings LLC	1,559,139	$64,174	12/31/2023
IRDM	1,559,139	$64,174	12/31/2023
Norges Bank	1,338,173	$55,079	12/31/2023
IRDM	1,338,173	$55,079	12/31/2023
Charles Schwab Investment Management Inc.	1,266,812	$52,142	12/31/2023
IRDM	1,266,812	$52,142	12/31/2023
Price T Rowe Associates Inc. MD	1,250,039	$51,452	12/31/2023
IRDM	1,250,039	$51,452	12/31/2023
Bank of New York Mellon Corp	1,225,138	$50,427	12/31/2023
IRDM	1,225,138	$50,427	12/31/2023
Select Equity Group L.P.	1,134,514	$46,697	12/31/2023
IRDM	1,134,514	$46,697	12/31/2023
Jacobs Levy Equity Management Inc.	1,068,999	$44,000	12/31/2023
IRDM	1,068,999	$44,000	12/31/2023
D. E. Shaw & Co. Inc.	977,060	$40,216	12/31/2023
IRDM	977,060	$40,216	12/31/2023
Nuveen Asset Management LLC	974,600	$40,115	12/31/2023
IRDM	974,600	$40,115	12/31/2023
Millennium Management LLC	941,555	$38,754	12/31/2023
IRDM	941,555	$38,754	12/31/2023
Morgan Stanley	933,907	$38,440	12/31/2023
IRDM	933,907	$38,440	12/31/2023
Pinnacle Associates Ltd.	716,341	$29,485	12/31/2023
IRDM	716,341	$29,485	12/31/2023
Pacer Advisors Inc.	603,900	$24,857	12/31/2023
IRDM	603,900	$24,857	12/31/2023
JPMorgan Chase & Co.	591,789	$24,358	12/31/2023
IRDM	591,789	$24,358	12/31/2023
Renaissance Technologies LLC	563,799	$23,206	12/31/2023
IRDM	563,799	$23,206	12/31/2023
Legal & General Group Plc	527,504	$21,712	12/31/2023
IRDM	527,504	$21,712	12/31/2023
Dudley & Shanley Inc.	521,335	$21,458	12/31/2023
IRDM	521,335	$21,458	12/31/2023
Brown Advisory Inc.	515,041	$21,199	12/31/2023
IRDM	515,041	$21,199	12/31/2023
Principal Financial Group Inc.	492,181	$20,258	12/31/2023
IRDM	492,181	$20,258	12/31/2023
Macquarie Group Ltd.	467,805	$19,255	12/31/2023
IRDM	467,805	$19,255	12/31/2023
Blair William & Co. IL	438,526	$18,050	12/31/2023
IRDM	438,526	$18,050	12/31/2023
Anchor Capital Management Company LLC	423,941	$17,449	12/31/2023
IRDM	423,941	$17,449	12/31/2023
Susquehanna Portfolio Strategies LLC	420,217	$17,296	12/31/2023
IRDM	420,217	$17,296	12/31/2023
Rhumbline Advisers	378,460	$15,577	12/31/2023
IRDM	378,460	$15,577	12/31/2023
FMR LLC	371,446	$15,289	12/31/2023
IRDM	371,446	$15,289	12/31/2023
Retirement Systems of Alabama	306,516	$12,616	12/31/2023
IRDM	306,516	$12,616	12/31/2023
AQR Capital Management LLC	297,135	$12,230	12/31/2023
IRDM	297,135	$12,230	12/31/2023
Bank of America Corp DE	293,153	$12,066	12/31/2023
IRDM	293,153	$12,066	12/31/2023
Ceredex Value Advisors LLC	290,400	$11,953	12/31/2023
IRDM	290,400	$11,953	12/31/2023
UBS Asset Management Americas Inc.	290,081	$11,940	12/31/2023
IRDM	290,081	$11,940	12/31/2023
Voloridge Investment Management LLC	277,851	$11,436	12/31/2023
IRDM	277,851	$11,436	12/31/2023
Man Group plc	253,338	$10,427	12/31/2023
IRDM	253,338	$10,427	12/31/2023
Voya Investment Management LLC	247,253	$10,177	12/31/2023
IRDM	247,253	$10,177	12/31/2023
Canada Pension Plan Investment Board	246,300	$10,138	12/31/2023
IRDM	246,300	$10,138	12/31/2023