IRIDIUM COMMUNICATIONS INC (IRDM) Institutional Shareholders
IRIDIUM COMMUNICATIONS INC (IRDM) is currently reported in institutional portfolios tracked by InsiderSet based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026. The institutional investors covered on this page collectively reported approximately $4.97B in IRDM holdings during the latest filing period.
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 $635.79M, representing an estimated loss of -13.80% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 55% 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
467
Total Reported Value
$4.97B
Largest Holder
Blackrock, Inc.
Largest Position
$737.59M
Insider Transactions (90d)
30
Latest Filing Quarter
Q2 2026
New Institutional Positions
106
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 | $635,790,141 | -$101,796,376 | -13.80% | |
| Aqr Capital Management Llc | 0.13% | 6,847,072 | $374,329,428 | $323,729,564 | -$50,599,864 | -13.52% | |
| Vanguard Portfolio Management Llc | 0.01% | 5,440,399 | $298,405,885 | $257,222,065 | -$41,183,820 | -13.80% | |
| American Century Companies Inc | 0.12% | 4,856,440 | $266,375,756 | $229,612,483 | -$36,763,273 | -13.80% | |
| State Street Corp | 0.01% | 4,733,714 | $259,644,213 | $223,809,998 | -$35,834,215 | -13.80% | |
| Vanguard Capital Management Llc | 0.00% | 4,232,161 | $232,134,031 | $200,096,572 | -$32,037,459 | -13.80% | |
| Silver Heights Capital Management Inc | 55.43% | 3,274,947 | $179,630,843 | $154,839,494 | -$24,791,349 | -13.80% | |
| Gotham Asset Management, Llc | 0.32% | 2,514,317 | $137,910,287 | $118,876,908 | -$19,033,379 | -13.80% | |
| Dimensional Fund Advisors Lp | 0.02% | 2,357,845 | $129,325,372 | $111,478,912 | -$17,846,460 | -13.80% | |
| Van Eck Associates Corp | 0.08% | 2,270,799 | $124,553,325 | $107,363,377 | -$17,189,948 | -13.80% | |
| Pacer Advisors, Inc. | 0.31% | 2,168,271 | $118,930,000 | $102,515,853 | -$16,414,147 | -13.80% | |
| Geode Capital Management, Llc | 0.01% | 2,044,823 | $112,185,904 | $96,679,231 | -$15,506,673 | -13.82% | |
| Morgan Stanley | 0.00% | 1,517,404 | $83,229,698 | $71,742,861 | -$11,486,837 | -13.80% | |
| Charles Schwab Investment Management Inc | 0.01% | 1,317,782 | $72,280,343 | $62,304,733 | -$9,975,610 | -13.80% | |
| ARK Invest | Cathie Wood | 0.43% | 1,215,113 | $66,648,948 | $57,450,543 | -$9,198,405 | -13.80% |
| Bank Of New York Mellon Corp | 0.01% | 1,144,055 | $62,751,442 | $54,090,920 | -$8,660,522 | -13.80% | |
| Ubs Group Ag | 0.01% | 1,005,602 | $55,157,270 | $47,544,863 | -$7,612,407 | -13.80% | |
| Balyasny Asset Management L.P. | 0.10% | 967,572 | $53,071,324 | $45,746,804 | -$7,324,520 | -13.80% | |
| Invesco Ltd. | 0.00% | 908,134 | $49,811,150 | $42,936,576 | -$6,874,574 | -13.80% | |
| Northern Trust Corp | 0.01% | 854,112 | $46,848,043 | $40,382,415 | -$6,465,628 | -13.80% | |
| Penserra Capital Management Llc | 0.35% | 838,592 | $45,996,000 | $39,648,630 | -$6,347,370 | -13.80% | |
| Jpmorgan Chase & Co | 0.00% | 789,191 | $43,323,552 | $37,312,950 | -$6,010,602 | -13.87% | |
| Arrowstreet Capital, Limited Partnership | 0.02% | 754,424 | $41,380,156 | $35,669,167 | -$5,710,989 | -13.80% | |
| Goldman Sachs Group Inc | 0.00% | 726,762 | $39,862,882 | $34,361,307 | -$5,501,575 | -13.80% | |
| Vanguard Fiduciary Trust Co | 0.01% | 657,958 | $36,088,996 | $31,108,254 | -$4,980,742 | -13.80% | |
| Schroder Investment Management Group | 0.02% | 641,884 | $35,040,448 | $30,348,276 | -$4,692,172 | -13.39% | |
| Renaissance Technologies LLC | Jim Simons | 0.05% | 609,799 | $33,447,475 | $28,831,297 | -$4,616,178 | -13.80% |
| Sumitomo Mitsui Trust Group, Inc. | 0.02% | 587,179 | $32,206,768 | $27,761,823 | -$4,444,945 | -13.80% | |
| Amova Asset Management Americas, Inc. | 0.39% | 550,679 | $30,199,236 | $26,036,103 | -$4,163,133 | -13.79% | |
| Brown Advisory Inc | 0.04% | 512,859 | $28,130,344 | $24,247,974 | -$3,882,370 | -13.80% | |
| Massachusetts Financial Services Co | 0.01% | 509,978 | $27,972,294 | $24,111,760 | -$3,860,534 | -13.80% | |
| Principal Financial Group Inc | 0.01% | 509,489 | $27,945,472 | $24,088,640 | -$3,856,832 | -13.80% | |
| Nuveen, Llc | 0.01% | 502,677 | $27,571,826 | $23,766,569 | -$3,805,257 | -13.80% | |
| Fmr Llc | 0.00% | 483,117 | $26,498,958 | $22,841,772 | -$3,657,186 | -13.80% | |
| Panagora Asset Management Inc | 0.08% | 482,003 | $26,437,865 | $22,789,102 | -$3,648,763 | -13.80% | |
| Sculptor Capital Lp | 0.27% | 469,000 | $25,724,650 | $22,174,320 | -$3,550,330 | -13.80% | |
| First Trust Advisors Lp | 0.02% | 465,768 | $25,547,374 | $22,021,511 | -$3,525,863 | -13.80% | |
| Man Group Plc | 0.04% | 416,442 | $22,841,844 | $19,689,378 | -$3,152,466 | -13.80% | |
| Public Sector Pension Investment Board | 0.06% | 407,340 | $22,342,599 | $19,259,035 | -$3,083,564 | -13.80% | |
| Russell Investments Group, Ltd. | 0.02% | 401,808 | $22,034,729 | $18,997,482 | -$3,037,247 | -13.78% | |
| Jefferies Financial Group Inc. | 0.20% | 396,110 | $21,726,634 | $18,728,081 | -$2,998,553 | -13.80% | |
| Pinnacle Associates Ltd | 0.24% | 394,679 | $21,648,122 | $18,660,423 | -$2,987,699 | -13.80% | |
| Legal & General Group Plc | 0.00% | 380,075 | $20,847,114 | $17,969,946 | -$2,877,168 | -13.80% | |
| Two Sigma Investments, Lp | 0.02% | 363,685 | $19,948,122 | $17,195,027 | -$2,753,095 | -13.80% | |
| Susquehanna International Group, Llp | 0.02% | 361,703 | $19,839,410 | $17,101,318 | -$2,738,092 | -13.80% | |
| Imc-Chicago, Llc | 0.18% | 354,368 | $19,437,085 | $16,754,519 | -$2,682,566 | -13.80% | |
| Mitsubishi Ufj Asset Management Co., Ltd. | 0.01% | 327,899 | $17,985,260 | $15,503,065 | -$2,482,195 | -13.80% | |
| Ieq Capital, Llc | 0.08% | 311,175 | $17,067,935 | $14,712,354 | -$2,355,581 | -13.80% | |
| Tema Etfs Llc | 0.55% | 309,229 | $16,961,211 | $14,620,347 | -$2,340,864 | -13.80% | |
| Braun Stacey Associates Inc | 0.46% | 295,922 | $16,231,322 | $13,991,192 | -$2,240,130 | -13.80% |
Frequently asked questions about IRDM
Who owns the most IRDM stock?
The largest holders of IRDM are typically major institutional investors such as asset managers and hedge funds reporting on Form 13F. The table above ranks tracked superinvestors by reported position size using the latest available filings for IRIDIUM COMMUNICATIONS INC (IRDM).
Is IRDM widely held by superinvestors?
Many widely followed stocks like IRDM appear across numerous superinvestor portfolios because of liquidity, index inclusion, and fundamentals. The holder count and table above show how broadly IRDM is represented among the institutional managers we track.
What do “Current Estimated Value”, “Gain/loss Since Filing”, and “Estimated Portfolio Performance” mean?
Current Estimated Value is reported share quantity from the latest 13F times our most recent split-adjusted U.S. session close. Gain/loss Since Filing is that estimate minus the reported 13F dollar value; Estimated Portfolio Performance is that difference as a percent of the reported value. Green means the estimate is above the filing value; red means below (not purchase cost). If many filers share the same implied filing price per share, the performance % may match across rows. These are not official fund marks or live quotes.