IRDM Institutional Ownership & Shareholders
IRIDIUM COMMUNICATIONS INC (IRDM) is currently held by 465 institutional investors tracked by InsiderSet, with a combined reported market value of approximately $4.85B based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026.
Blackrock, Inc. is currently the largest disclosed institutional shareholder of IRDM tracked by InsiderSet, reporting ownership valued at approximately $737.59M in its June 30, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $603.92M, representing an estimated loss of -18.12% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 56% of the total disclosed IRDM value among the investors covered in this analysis. Major shareholders include Blackrock, Inc., Aqr Capital Management Llc, Vanguard Portfolio Management Llc, and several other long-term asset managers with concentrated positions in IRIDIUM COMMUNICATIONS INC (IRDM).
This page ranks the largest institutional IRDM shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
465
Total Reported Value
$4.85B
Largest Holder
Blackrock, Inc.
Largest Position
$737.59M
Insider Transactions (90d)
30
Latest Filing Quarter
Q2 2026
New Institutional Positions
117
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Blackrock, Inc. | 0.01% | 13,447,338 | $737,586,517 | $603,919,950 | -$133,666,567 | -18.12% | |
| Aqr Capital Management Llc | 0.13% | 6,847,072 | $374,329,428 | $307,502,004 | -$66,827,424 | -17.85% | |
| Vanguard Portfolio Management Llc | 0.01% | 5,440,399 | $298,405,885 | $244,328,319 | -$54,077,566 | -18.12% | |
| American Century Companies Inc | 0.12% | 4,856,440 | $266,375,756 | $218,102,720 | -$48,273,036 | -18.12% | |
| State Street Corp | 0.01% | 4,733,714 | $259,644,213 | $212,591,096 | -$47,053,117 | -18.12% | |
| Vanguard Capital Management Llc | 0.00% | 4,232,161 | $232,134,031 | $190,066,351 | -$42,067,680 | -18.12% | |
| Silver Heights Capital Management Inc | 55.43% | 3,274,947 | $179,630,843 | $147,077,870 | -$32,552,973 | -18.12% | |
| Gotham Asset Management, Llc | 0.32% | 2,514,317 | $137,910,287 | $112,917,976 | -$24,992,311 | -18.12% | |
| Dimensional Fund Advisors Lp | 0.02% | 2,357,845 | $129,325,372 | $105,890,819 | -$23,434,553 | -18.12% | |
| Van Eck Associates Corp | 0.08% | 2,270,799 | $124,553,325 | $101,981,583 | -$22,571,742 | -18.12% | |
| Pacer Advisors, Inc. | 0.31% | 2,168,271 | $118,930,000 | $97,377,051 | -$21,552,949 | -18.12% | |
| Geode Capital Management, Llc | 0.01% | 2,044,823 | $112,185,904 | $91,833,001 | -$20,352,903 | -18.14% | |
| Morgan Stanley | 0.00% | 1,517,404 | $83,229,698 | $68,146,614 | -$15,083,084 | -18.12% | |
| Charles Schwab Investment Management Inc | 0.01% | 1,317,782 | $72,280,343 | $59,181,590 | -$13,098,753 | -18.12% | |
| ARK Invest | Cathie Wood | 0.43% | 1,215,113 | $66,648,948 | $54,570,725 | -$12,078,223 | -18.12% |
| Bank Of New York Mellon Corp | 0.01% | 1,144,055 | $62,751,442 | $51,379,510 | -$11,371,932 | -18.12% | |
| Ubs Group Ag | 0.01% | 1,005,602 | $55,157,270 | $45,161,586 | -$9,995,684 | -18.12% | |
| Balyasny Asset Management L.P. | 0.10% | 967,572 | $53,071,324 | $43,453,659 | -$9,617,665 | -18.12% | |
| Invesco Ltd. | 0.00% | 908,134 | $49,811,150 | $40,784,298 | -$9,026,852 | -18.12% | |
| Northern Trust Corp | 0.01% | 854,112 | $46,848,043 | $38,358,170 | -$8,489,873 | -18.12% | |
| Penserra Capital Management Llc | 0.35% | 838,592 | $45,996,000 | $37,661,167 | -$8,334,833 | -18.12% | |
| Jpmorgan Chase & Co | 0.00% | 789,191 | $43,323,552 | $35,442,568 | -$7,880,984 | -18.19% | |
| Arrowstreet Capital, Limited Partnership | 0.02% | 754,424 | $41,380,156 | $33,881,182 | -$7,498,974 | -18.12% | |
| Goldman Sachs Group Inc | 0.00% | 726,762 | $39,862,882 | $32,638,881 | -$7,224,001 | -18.12% | |
| Vanguard Fiduciary Trust Co | 0.01% | 657,958 | $36,088,996 | $29,548,894 | -$6,540,102 | -18.12% | |
| Schroder Investment Management Group | 0.02% | 641,884 | $35,040,448 | $28,827,010 | -$6,213,438 | -17.73% | |
| Renaissance Technologies LLC | Jim Simons | 0.05% | 609,799 | $33,447,475 | $27,386,073 | -$6,061,402 | -18.12% |
| Amova Asset Management Americas, Inc. | 0.39% | 550,679 | $30,199,236 | $24,730,994 | -$5,468,242 | -18.11% | |
| Brown Advisory Inc | 0.04% | 512,859 | $28,130,344 | $23,032,498 | -$5,097,846 | -18.12% | |
| Massachusetts Financial Services Co | 0.01% | 509,978 | $27,972,294 | $22,903,112 | -$5,069,182 | -18.12% | |
| Nuveen, Llc | 0.01% | 502,677 | $27,571,826 | $22,575,224 | -$4,996,602 | -18.12% | |
| Fmr Llc | 0.00% | 483,117 | $26,498,958 | $21,696,784 | -$4,802,174 | -18.12% | |
| Panagora Asset Management Inc | 0.08% | 482,003 | $26,437,865 | $21,646,755 | -$4,791,110 | -18.12% | |
| Sculptor Capital Lp | 0.27% | 469,000 | $25,724,650 | $21,062,790 | -$4,661,860 | -18.12% | |
| First Trust Advisors Lp | 0.02% | 465,768 | $25,547,374 | $20,917,641 | -$4,629,733 | -18.12% | |
| Principal Financial Group Inc | 0.01% | 502,082 | $24,049,727 | $22,548,503 | -$1,501,224 | -6.24% | |
| Man Group Plc | 0.04% | 416,442 | $22,841,844 | $18,702,410 | -$4,139,434 | -18.12% | |
| Public Sector Pension Investment Board | 0.06% | 407,340 | $22,342,599 | $18,293,639 | -$4,048,960 | -18.12% | |
| Russell Investments Group, Ltd. | 0.02% | 401,808 | $22,034,729 | $18,045,197 | -$3,989,532 | -18.11% | |
| Jefferies Financial Group Inc. | 0.20% | 396,110 | $21,726,634 | $17,789,300 | -$3,937,334 | -18.12% | |
| Legal & General Group Plc | 0.00% | 380,075 | $20,847,114 | $17,069,168 | -$3,777,946 | -18.12% | |
| Cushing Asset Management, Lp Dba Nxg Investment Management | 0.91% | 416,500 | $19,950,350 | $18,705,015 | -$1,245,335 | -6.24% | |
| Two Sigma Investments, Lp | 0.02% | 363,685 | $19,948,122 | $16,333,093 | -$3,615,029 | -18.12% | |
| Susquehanna International Group, Llp | 0.02% | 361,703 | $19,839,410 | $16,244,082 | -$3,595,328 | -18.12% | |
| Imc-Chicago, Llc | 0.18% | 354,368 | $19,437,085 | $15,914,667 | -$3,522,418 | -18.12% | |
| Pinnacle Associates Ltd | 0.22% | 401,167 | $19,215,881 | $18,016,410 | -$1,199,471 | -6.24% | |
| Mitsubishi Ufj Asset Management Co., Ltd. | 0.01% | 327,899 | $17,985,260 | $14,725,944 | -$3,259,316 | -18.12% | |
| Ieq Capital, Llc | 0.08% | 311,175 | $17,067,935 | $13,974,869 | -$3,093,066 | -18.12% | |
| Alpine Associates Management Inc. | 0.99% | 289,700 | $15,890,045 | $13,010,427 | -$2,879,618 | -18.12% | |
| Defiance Etfs, Llc | 0.21% | 277,161 | $15,443,411 | $12,447,301 | -$2,996,110 | -19.40% |
Frequently asked questions about IRDM
Who are the largest institutional holders of IRDM?
The largest institutional holders of IRDM reported in the latest SEC Form 13F filings include Blackrock, Inc., Aqr Capital Management Llc, Vanguard Portfolio Management Llc, American Century Companies Inc, and State Street Corp. InsiderSet ranks institutional holders by their latest reported IRDM position.
What is IRDM institutional ownership?
This page tracks IRDM positions reported by institutional investment managers through SEC Form 13F. IRIDIUM COMMUNICATIONS INC (IRDM) institutional ownership on InsiderSet reflects disclosed 13F holdings among the managers we analyze, not every shareholder of the stock.
How many institutions own IRDM?
InsiderSet currently tracks 465 institutional managers reporting IRDM holdings in the latest available 13F data. This count reflects institutions included in the SEC Form 13F filings analyzed by InsiderSet and should not be interpreted as the total number of IRDM shareholders.
How much IRDM stock do institutions own?
Institutional investment managers disclosed approximately $4.85B in IRDM holdings for Q2 2026. This figure is reported 13F value as of the filing period, not necessarily today's market value.
When was IRDM institutional ownership last updated?
The latest IRDM institutional ownership data on InsiderSet is based on SEC Form 13F filings for the quarter ended June 30, 2026. Form 13F filings are generally reported after the quarter ends, so the holdings shown represent the latest publicly disclosed positions rather than real-time institutional holdings.
Are institutional IRDM holdings real-time?
No. Form 13F data is not real-time. It represents positions reported by institutional investment managers as of the end of the reporting quarter. An institution may have changed its IRDM position after the reporting date.
Are institutions buying or selling IRDM?
Institutional buying and selling can be analyzed by comparing IRDM positions across consecutive 13F reporting periods. InsiderSet's IRDM Ownership Changes page shows institutions that increased, reduced, initiated, or exited positions based on reported 13F holdings. View IRDM ownership changes.
How has IRDM institutional ownership changed over time?
InsiderSet tracks IRDM institutional holdings across multiple 13F reporting periods, allowing investors to compare institutional holder counts, reported value, and reported shares over time.