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 $2.47B 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 $386.68M in its March 31, 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 $659.90M, representing an estimated gain of +70.66% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 54% of the total disclosed IRDM value among the investors covered in this analysis. Major shareholders include Blackrock, Inc., Vanguard Portfolio Management Llc, Silver Heights Capital Management Inc, 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
412
Total Reported Value
$2.47B
Largest Holder
Blackrock, Inc.
Largest Position
$386.68M
Insider Transactions (90d)
19
Latest Filing Quarter
Q2 2026
New Institutional Positions
119
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% | 13,939,618 | $386,684,998 | $659,901,516 | +$273,216,518 | +70.66% | |
| Vanguard Portfolio Management Llc | 0.01% | 6,091,749 | $168,985,117 | $288,383,398 | +$119,398,281 | +70.66% | |
| Silver Heights Capital Management Inc | 54.85% | 5,145,479 | $142,735,587 | $243,586,976 | +$100,851,389 | +70.66% | |
| State Street Corp | 0.00% | 5,050,166 | $140,091,605 | $239,074,858 | +$98,983,253 | +70.66% | |
| Vanguard Capital Management Llc | 0.00% | 4,111,325 | $114,048,156 | $194,630,126 | +$80,581,970 | +70.66% | |
| American Century Companies Inc | 0.05% | 3,469,954 | $96,256,531 | $164,267,622 | +$68,011,091 | +70.66% | |
| Gotham Asset Management, Llc | 0.28% | 3,353,971 | $93,039,156 | $158,776,987 | +$65,737,831 | +70.66% | |
| Aqr Capital Management Llc | 0.04% | 2,917,827 | $80,940,517 | $138,129,930 | +$57,189,413 | +70.66% | |
| Dimensional Fund Advisors Lp | 0.01% | 2,159,061 | $59,884,289 | $102,209,948 | +$42,325,659 | +70.68% | |
| Geode Capital Management, Llc | 0.00% | 2,007,011 | $55,688,276 | $95,011,901 | +$39,323,625 | +70.61% | |
| Man Group Plc | 0.11% | 1,907,044 | $52,901,400 | $90,279,463 | +$37,378,063 | +70.66% | |
| ARK Invest | Cathie Wood | 0.37% | 1,726,802 | $47,901,487 | $81,746,807 | +$33,845,320 | +70.66% |
| Morgan Stanley | 0.00% | 1,583,337 | $43,921,837 | $74,955,174 | +$31,033,337 | +70.66% | |
| Charles Schwab Investment Management Inc | 0.01% | 1,366,005 | $37,892,979 | $64,666,677 | +$26,773,698 | +70.66% | |
| Ubs Group Ag | 0.01% | 1,284,561 | $35,633,723 | $60,811,118 | +$25,177,395 | +70.66% | |
| Schroder Investment Management Group | 0.03% | 1,282,639 | $34,387,552 | $60,720,130 | +$26,332,578 | +76.58% | |
| Sumitomo Mitsui Trust Group, Inc. | 0.02% | 587,179 | $32,206,768 | $27,797,054 | -$4,409,714 | -13.69% | |
| Bank Of New York Mellon Corp | 0.01% | 1,150,450 | $31,913,479 | $54,462,303 | +$22,548,824 | +70.66% | |
| Arrowstreet Capital, Limited Partnership | 0.02% | 1,101,231 | $30,548,148 | $52,132,276 | +$21,584,128 | +70.66% | |
| Massachusetts Financial Services Co | 0.01% | 509,978 | $27,972,294 | $24,142,359 | -$3,829,935 | -13.69% | |
| Barclays Plc | 0.01% | 994,069 | $27,575,474 | $47,059,226 | +$19,483,752 | +70.66% | |
| Invesco Ltd. | 0.00% | 987,926 | $27,405,067 | $46,768,417 | +$19,363,350 | +70.66% | |
| Select Equity Group, L.P. | 0.14% | 942,519 | $26,145,477 | $44,618,849 | +$18,473,372 | +70.66% | |
| Goldman Sachs Group Inc | 0.00% | 928,388 | $25,753,496 | $43,949,888 | +$18,196,392 | +70.66% | |
| Jupiter Asset Management Ltd | 0.13% | 893,282 | $24,779,643 | $42,287,970 | +$17,508,327 | +70.66% | |
| Northern Trust Corp | 0.00% | 863,494 | $23,953,324 | $40,877,806 | +$16,924,482 | +70.66% | |
| Pinnacle Associates Ltd | 0.24% | 394,679 | $21,648,122 | $18,684,104 | -$2,964,018 | -13.69% | |
| Amova Asset Management Americas, Inc. | 0.29% | 736,973 | $20,443,631 | $34,888,302 | +$14,444,671 | +70.66% | |
| Vanguard Fiduciary Trust Co | 0.00% | 636,855 | $17,666,358 | $30,148,716 | +$12,482,358 | +70.66% | |
| Tema Etfs Llc | 0.55% | 309,229 | $16,961,211 | $14,638,901 | -$2,322,310 | -13.69% | |
| Fmr Llc | 0.00% | 540,053 | $14,981,086 | $25,566,109 | +$10,585,023 | +70.66% | |
| Mitsubishi Ufj Asset Management Co., Ltd. | 0.01% | 538,427 | $14,935,965 | $25,489,134 | +$10,553,169 | +70.66% | |
| Panagora Asset Management Inc | 0.06% | 529,520 | $14,688,885 | $25,067,477 | +$10,378,592 | +70.66% | |
| Brown Advisory Inc | 0.02% | 512,576 | $14,218,855 | $24,265,348 | +$10,046,493 | +70.66% | |
| Principal Financial Group Inc | 0.01% | 508,290 | $14,099,965 | $24,062,449 | +$9,962,484 | +70.66% | |
| Millennium Management Llc | 0.01% | 494,662 | $13,721,924 | $23,417,299 | +$9,695,375 | +70.66% | |
| Cushing Asset Management, Lp Dba Nxg Investment Management | 0.58% | 236,000 | $12,944,600 | $11,172,240 | -$1,772,360 | -13.69% | |
| Nuveen, Llc | 0.00% | 425,145 | $11,793,522 | $20,126,364 | +$8,332,842 | +70.66% | |
| Two Sigma Investments, Lp | 0.01% | 402,428 | $11,163,353 | $19,050,942 | +$7,887,589 | +70.66% | |
| Stifel Financial Corp | 0.01% | 397,887 | $11,037,136 | $18,835,971 | +$7,798,835 | +70.66% | |
| Legal & General Group Plc | 0.00% | 378,692 | $10,504,916 | $17,927,279 | +$7,422,363 | +70.66% | |
| Public Sector Pension Investment Board | 0.03% | 375,511 | $10,416,675 | $17,776,691 | +$7,360,016 | +70.66% | |
| Raymond James Financial Inc | 0.00% | 368,276 | $10,215,967 | $17,434,186 | +$7,218,219 | +70.66% | |
| Ubs Am, A Distinct Business Unit Of Ubs Asset Management Americas Llc | 0.00% | 359,530 | $9,973,362 | $17,020,150 | +$7,046,788 | +70.66% | |
| Russell Investments Group, Ltd. | 0.01% | 352,947 | $9,774,778 | $16,708,511 | +$6,933,733 | +70.93% | |
| First Trust Advisors Lp | 0.01% | 352,249 | $9,771,387 | $16,675,468 | +$6,904,081 | +70.66% | |
| Bank Of America Corp | 0.00% | 351,234 | $9,743,231 | $16,627,418 | +$6,884,187 | +70.66% | |
| Citigroup Inc | 0.00% | 163,745 | $8,981,414 | $7,751,688 | -$1,229,726 | -13.69% | |
| Janus Henderson Group Plc | 0.00% | 306,684 | $8,507,638 | $14,518,421 | +$6,010,783 | +70.65% | |
| Retirement Systems Of Alabama | 0.03% | 151,400 | $8,304,290 | $7,167,276 | -$1,137,014 | -13.69% |
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.