IRDM · Iridium Communications Inc. · Holdings
Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.
Institutional Ownership Trend
Superinvestors Holding IRDM
All superinvestors →Holder Concentration
Across 492 13F filersWho Holds IRDM
Last 8 quarters through Sep 30, 2026 (filing window open)Each kind of 13F filer's share of the common shares 13F filers report. Holder type comes from regulatory records, never the filer's name; style, turnover and horizon are measured from each filer's own 13F book. The quarter selector does not change this card.
Jun 30, 2026, the newest closed quarter: 486 filers, like-for-like change +1.4%; actively managed books +7.0%; index-like books -0.9%.
| Holder type | Share | Filers | Change |
|---|---|---|---|
| Registered adviser | 50.3% | 281 | +3.2% |
| Exempt adviser | 0.4% | 4 | +681.1% |
| Adviser | 1.3% | 8 | -10.2% |
| Bank | 10.8% | 24 | -14.1% |
| Insurer | 0.7% | 2 | +0.1% |
| Broker-dealer | 0.2% | 2 | +190.2% |
| Benefit plan | 0.4% | 7 | +1.4% |
| Non-US | 0.9% | 8 | -2.2% |
| Holding company | 18.3% | 8 | -1.7% |
| Unknown | 16.7% | 142 | +10.4% |
| Style | Share | Filers | Change |
|---|---|---|---|
| Index-like | 38.7% | 46 | -0.9% |
| Systematic-like | 2.4% | 26 | +22.3% |
| Concentrated | 1.0% | 72 | +6.4% |
| Diversified active | 54.3% | 341 | +6.4% |
| Unknown | 3.6% | 1 | -36.4% |
| Not measured | 0.0% | 0 | — |
| Turnover | Share | Filers | Change |
|---|---|---|---|
| Low turnover | 54.3% | 296 | -6.6% |
| Medium turnover | 29.2% | 108 | +18.0% |
| High turnover | 4.2% | 44 | +41.5% |
| Unknown | 12.3% | 38 | -3.8% |
| Not measured | 0.0% | 0 | — |
| Holding horizon | Share | Filers | Change |
|---|---|---|---|
| Short horizon | 13.9% | 59 | +4.0% |
| Medium horizon | 17.8% | 82 | -6.4% |
| Long horizon | 65.3% | 319 | +2.9% |
| Unknown | 3.0% | 26 | +6.9% |
| Not measured | 0.0% | 0 | — |
| 13F book size | Share | Filers | Change |
|---|---|---|---|
| Under $1B | 4.9% | 130 | -29.1% |
| $1B to $10B | 6.3% | 149 | +53.2% |
| $10B to $100B | 17.3% | 133 | -3.9% |
| $100B or more | 71.5% | 74 | +2.7% |
| Not measured | 0.0% | 0 | — |
| Client base | Share | Filers | Change |
|---|---|---|---|
| Individuals and high net worth | 3.8% | 177 | +8.6% |
| Pooled investment vehicles | 6.3% | 40 | -9.4% |
| Registered funds and BDCs | 24.4% | 32 | +5.0% |
| Pension and profit sharing plans | 0.1% | 3 | +115.9% |
| Insurance companies | 0.0% | 2 | -35.7% |
| Charitable organizations | 0.0% | 1 | +200.0% |
| Governments and sovereign funds | 0.9% | 5 | -7.8% |
| Banks and thrifts | 0.0% | 1 | new |
| Other investment advisers | 0.1% | 6 | +66.7% |
| Other | 0.1% | 1 | +5.0% |
| Diversified | 14.7% | 13 | +5.5% |
| Corporations | 0.0% | 0 | -100.0% |
| Unknown | 49.7% | 205 | -0.4% |
| Private funds | Share | Filers | Change |
|---|---|---|---|
| Hedge funds | 18.6% | 53 | +15.4% |
| Private equity funds | 1.0% | 17 | +10.6% |
| Venture capital funds | 0.0% | 3 | +860.3% |
| Real estate funds | 0.1% | 7 | +99.3% |
| Liquidity funds | 0.0% | 1 | new |
| Securitized asset funds | 0.4% | 1 | -5.2% |
| Other private funds | 5.2% | 27 | +4.2% |
| Mixed private funds | 0.1% | 1 | -66.8% |
| Private funds, type not stated | 3.4% | 12 | +100.8% |
| No private funds | 22.1% | 163 | -10.0% |
| Unknown | 49.2% | 201 | -1.2% |
| Location | Share | Filers | Change |
|---|---|---|---|
| United States | 89.5% | 420 | +9.4% |
| Outside the US | 10.5% | 66 | -37.5% |
The Sep 30, 2026 filing window is still open, so its bar carries the Jun 30, 2026 positions of filers that have not filed yet.
How the mix is measured
Shares are 13F common shares restated to today's split basis; options and principal amounts are left out. The change compares only filers with a 13F in both quarters and keeps each filer in its bucket of the later quarter on both sides; a filer that continues under a new CIK is compared through its successor. Holder type comes from each filer's current regulatory profile; client base and private funds come from the Form ADV roster current at each quarter end (rosters from December 2019, so an earlier quarter reads Unknown). Style, turnover, horizon and book size are measured from each filer's 13F book in the newest measured quarter, and Not measured means none was. Actively managed books are those measured systematic-like, concentrated or diversified active.
Excluded 5 holders with no observed 2026-03-31 13F and 4 holders with no observed 2026-06-30 13F. Compared across CIK changes: JANUS HENDERSON GROUP PLC continues as Jupiter Topco LLC; Trask Adam Roland continues as Burnham & Co LLC.
Conviction and Crowding
486 13F filers, quarter ended Jun 30, 2026Measured across every 13F filer's common-share book once the quarter's filing window closed. Crowding counts filers with high turnover or that advise private funds on Form ADV.
Managers in the top fifth by current three-year FundScore alpha were net buyers of $0 (0 buying, 0 selling).
Estimated Holder Cost Basis
Quarter ended Jun 30, 2026, on that quarter's share basisEstimated, never filed: each 13F buy is costed at its quarter's average traded price and each sale keeps the average cost, so this is what holders paid on average if they traded evenly through each quarter.
Estimated cost covers 20.1% of the 13F shares; positions already held when a filer's 13F history starts, or bought in a quarter without a trusted average price, have no estimate.
Shared Holders
Companies IRDM's active holders also own, quarter ended Jun 30, 2026| # | Company | Shared holders |
|---|---|---|
| 1 | ARCT Arcturus Therapeutics Holdings Inc. | 3 |
| 2 | LEG Leggett & Platt Inc | 4 |
| 3 | POET Poet Technologies Inc. | 4 |
| 4 | NEU Newmarket Corp | 4 |
| 5 | KPET KPET Ultra Paceline Corp | 3 |
| 6 | RDW Redwire Corp | 4 |
| 7 | QRVO Qorvo, Inc. | 5 |
| 8 | STEL Stellar Bancorp, Inc. | 4 |
| 9 | SKYT SkyWater Technology, LLC | 3 |
| 10 | TVIV Texas Ventures Acquisition IV Corp | 3 |
Shareholder Targets
13F filers that own its peers but not IRDM, quarter ended Jun 30, 2026Found through its holder-overlap peers: ARCT, LEG, POET, NEU, KPET, RDW, QRVO, STEL, SKYT, TVIV, CAKE, LUNR, CRBG, ZIM, SBXE, COHR, GSAT, IPAR, ALUB, AMD. 3,958 filers in all.
| # | Filer | In peers | Largest peers |
|---|---|---|---|
| 1 | NORGES BANK Non-US, Index-like | $15,313,674,629 8 held | AMD, COHR, CRBG |
| 2 | WELLINGTON MANAGEMENT GROUP LLP Holding company, Diversified active | $5,905,004,008 4 held | AMD, COHR, CRBG |
| 3 | JENNISON ASSOCIATES LLC Registered adviser, Diversified active | $5,793,387,546 1 held | AMD |
| 4 | NIPPON LIFE INSURANCE CO Unknown, Concentrated | $3,491,607,609 1 held | CRBG |
| 5 | Assenagon Asset Management S.A. Unknown, Diversified active | $3,208,285,086 4 held | AMD, QRVO, COHR |
| 6 | NVIDIA CORP Unknown, Concentrated | $3,072,195,869 1 held | COHR |
| 7 | Swedbank AB Unknown, Diversified active | $2,488,017,040 3 held | AMD, COHR, CRBG |
| 8 | MARSHALL WACE, LLP Exempt adviser, Systematic-like | $2,396,732,471 12 held | AMD, COHR, QRVO |
| 9 | Clear Street Group Inc. Unknown, Concentrated | $2,332,323,810 9 held | AMD, COHR, LUNR |
| 10 | Polar Capital Holdings Plc Registered adviser, Diversified active | $2,269,146,466 2 held | AMD, COHR |
Fund Ownership of IRDM by Fund Type
Registered funds' Form N-PORT reports for the quarter ended Jun 30, 2026Index funds and index ETFs hold 28.36% of shares outstanding.
| Fund type | Of shares outstanding | Shares |
|---|---|---|
| Index funds | 3.64% | 3,867,042 |
| Index ETFs | 24.72% | 26,244,123 |
| Active ETFs | 2.70% | 2,867,229 |
| Active funds | 5.17% | 5,484,844 |
| Unclassified | 5.42% | 5,755,941 |
| All registered funds | 41.65% | 44,219,179 |
How fund types are measured
Each fund series counts once, with its latest Form N-PORT report dated inside the quarter; only long share positions count, restated to today's split basis. The fund type is the series' latest Form N-CEN answer on or before the quarter end (the index-fund box and the exchange-traded flag), never its name. Unclassified funds have no usable N-CEN; unit investment trusts are among them, so index ownership is a floor. Funds sit inside their advisers' 13F reports, so these shares overlap the 13F figures and are never added to them.
| Holder | Value (USD) | % of 13F | Shares | Type | Filed | Open |
|---|---|---|---|---|---|---|
| Mega BlackRock, Inc. Holding company | $737,586,483 | 14.52% | 13,447,338 | Shares | 2026-08-07 | |
| Mega AQR CAPITAL MANAGEMENT LLC Registered adviser | $375,561,893 | 7.39% | 6,847,072 | Shares | 2026-08-14 | |
| Mega VANGUARD PORTFOLIO MANAGEMENT LLC Registered adviser | $298,405,885 | 5.87% | 5,440,399 | Shares | 2026-08-13 | |
| Mega AMERICAN CENTURY COMPANIES INC | $266,375,734 | 5.24% | 4,856,440 | Shares | 2026-08-12 | |
| Mega STATE STREET CORP Bank | $259,644,212 | 5.11% | 4,733,714 | Shares | 2026-09-22 | |
| Mega VANGUARD CAPITAL MANAGEMENT LLC Registered adviser | $232,134,030 | 4.57% | 4,232,161 | Shares | 2026-08-13 | |
| Small Silver Heights Capital Management Inc Registered adviser | $179,630,842 | 3.54% | 3,274,947 | Shares | 2026-08-12 | |
| Large Gotham Asset Management, LLC Registered adviser | $137,910,287 | 2.71% | 2,514,317 | Shares | 2026-08-14 | |
| Mega DIMENSIONAL FUND ADVISORS LP Registered adviser | $129,327,797 | 2.55% | 2,357,845 | Shares | 2026-08-11 | |
| Mega VAN ECK ASSOCIATES CORP Registered adviser | $124,553,323 | 2.45% | 2,270,799 | Shares | 2026-08-14 | |
| Large Pacer Advisors, Inc. | $118,929,664 | 2.34% | 2,168,271 | Shares | 2026-08-13 | |
| Mega GEODE CAPITAL MANAGEMENT, LLC Registered adviser | $112,158,541 | 2.21% | 2,044,823 | Shares | 2026-08-12 | |
| Mega MORGAN STANLEY Holding company | $83,229,604 | 1.64% | 1,517,404 | Shares | 2026-08-13 | |
| Mega CHARLES SCHWAB INVESTMENT MANAGEMENT INC Registered adviser | $72,280,342 | 1.42% | 1,317,782 | Shares | 2026-08-14 | |
| Large ARK Investment Management LLC Registered adviser | $66,648,948 | 1.31% | 1,215,113 | Shares | 2026-08-14 | |
| Mega Bank of New York Mellon Corp Bank | $62,751,411 | 1.24% | 1,144,055 | Shares | 2026-08-06 | |
| Mega UBS Group AG Bank | $55,157,268 | 1.09% | 1,005,602 | Shares | 2026-08-13 | |
| Large Balyasny Asset Management L.P. Registered adviser | $53,071,324 | 1.04% | 967,572 | Shares | 2026-08-14 | |
| Mega Invesco Ltd. Adviser | $49,811,147 | 0.98% | 908,134 | Shares | 2026-08-14 | |
| Mega NORTHERN TRUST CORP Bank | $46,848,041 | 0.92% | 854,112 | Shares | 2026-08-13 | |
| Large Penserra Capital Management LLC Registered adviser | $45,996,770 | 0.91% | 838,592 | Shares | 2026-08-13 | |
| Mega JPMORGAN CHASE & CO Bank | $43,287,124 | 0.85% | 789,191 | Shares | 2026-08-12 | |
| Mega ARROWSTREET CAPITAL, LIMITED PARTNERSHIP Registered adviser | $41,380,156 | 0.81% | 754,424 | Shares | 2026-08-13 | |
| Mega GOLDMAN SACHS GROUP INC Holding company | $39,862,894 | 0.78% | 726,762 | Shares | 2026-08-14 | |
| Mega VANGUARD FIDUCIARY TRUST CO | $36,088,996 | 0.71% | 657,958 | Shares | 2026-08-13 | |
| Mega SCHRODER INVESTMENT MANAGEMENT GROUP Registered adviser | $35,207,337 | 0.69% | 641,884 | Shares | 2026-08-13 | |
| Large RENAISSANCE TECHNOLOGIES LLC Registered adviser | $33,447,475 | 0.66% | 609,799 | Shares | 2026-08-13 | |
| Mega Sumitomo Mitsui Trust Group, Inc. Bank | $32,206,768 | 0.63% | 587,179 | Shares | 2026-07-30 | |
| Mid Amova Asset Management Americas, Inc. Registered adviser | $30,204,743 | 0.59% | 550,679 | Shares | 2026-08-13 | |
| Large BROWN ADVISORY INC | $28,130,315 | 0.55% | 512,859 | Shares | 2026-08-14 | |
| Mega MASSACHUSETTS FINANCIAL SERVICES CO /MA/ Registered adviser | $27,972,292 | 0.55% | 509,978 | Shares | 2026-08-03 | |
| Mega PRINCIPAL FINANCIAL GROUP INC Insurer | $27,945,471 | 0.55% | 509,489 | Shares | 2026-08-04 | |
| Mega Nuveen, LLC | $27,571,832 | 0.54% | 502,677 | Shares | 2026-08-11 | |
| Mega FMR LLC Holding company | $26,498,966 | 0.52% | 483,117 | Shares | 2026-08-13 | |
| Large PANAGORA ASSET MANAGEMENT INC Registered adviser | $26,437,864 | 0.52% | 482,003 | Shares | 2026-08-06 | |
| Mid Sculptor Capital LP Registered adviser | $25,724,650 | 0.51% | 469,000 | Shares | 2026-08-14 | |
| Mega FIRST TRUST ADVISORS LP Registered adviser | $25,547,374 | 0.50% | 465,768 | Shares | 2026-08-11 | |
| Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP | $23,892,660 | 0.47% | 435,600 | Call | 2026-08-14 | |
| Large Man Group plc | $22,841,843 | 0.45% | 416,442 | Shares | 2026-08-14 | |
| Mega CITADEL ADVISORS LLC Registered adviser | $22,378,800 | 0.44% | 408,000 | Call | 2026-09-02 | |
| Large Public Sector Pension Investment Board Non-US | $22,342,599 | 0.44% | 407,340 | Shares | 2026-08-13 | |
| Mega Russell Investments Group, Ltd. | $22,039,166 | 0.43% | 401,808 | Shares | 2026-08-06 | |
| Large Jefferies Financial Group Inc. Holding company | $21,726,633 | 0.43% | 396,110 | Shares | 2026-08-17 | |
| Mega Legal & General Group Plc | $20,847,113 | 0.41% | 380,075 | Shares | 2026-08-14 | |
| Mega TWO SIGMA INVESTMENTS, LP Registered adviser | $19,948,122 | 0.39% | 363,685 | Shares | 2026-08-14 | |
| Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP | $19,839,409 | 0.39% | 361,703 | Shares | 2026-08-14 | |
| Large IMC-Chicago, LLC | $19,437,084 | 0.38% | 354,368 | Shares | 2026-08-06 | |
| Mid PINNACLE ASSOCIATES LTD Registered adviser | $19,215,899 | 0.38% | 401,167 | Shares | 2026-10-20 | |
| Mega UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC Registered adviser | $18,696,768 | 0.37% | 340,871 | Shares | 2026-08-13 | |
| Mega Mitsubishi UFJ Asset Management Co., Ltd. | $17,985,260 | 0.35% | 327,899 | Shares | 2026-08-07 | |
| Mega Jupiter Topco LLC | $17,847,476 | 0.35% | 325,387 | Shares | 2026-08-14 | |
| Large IEQ CAPITAL, LLC Registered adviser | $17,067,948 | 0.34% | 311,175 | Shares | 2026-08-11 | |
| Mid ALPINE ASSOCIATES MANAGEMENT INC. Registered adviser | $15,890,045 | 0.31% | 289,700 | Shares | 2026-08-06 | |
| Mid Defiance ETFs, LLC Registered adviser | $15,202,280 | 0.30% | 277,161 | Shares | 2026-08-14 | |
| Mid BRAUN STACEY ASSOCIATES INC | $15,067,040 | 0.30% | 314,552 | Shares | 2026-10-19 | |
| Large Mariner, LLC Registered adviser | $14,940,975 | 0.29% | 272,397 | Shares | 2026-08-13 | |
| Mega NORDEA INVESTMENT MANAGEMENT AB Non-US | $14,261,054 | 0.28% | 260,001 | Shares | 2026-08-05 | |
| Small Robertson Opportunity Capital, LLC Registered adviser | $13,731,478 | 0.27% | 250,346 | Shares | 2026-08-13 | |
| Mega BANK OF AMERICA CORP /DE/ Bank | $13,445,599 | 0.26% | 245,134 | Shares | 2026-08-14 | |
| Large MACKENZIE FINANCIAL CORP Registered adviser | $12,974,328 | 0.26% | 236,542 | Shares | 2026-08-13 | |
| Mid CUSHING ASSET MANAGEMENT, LP dba NXG INVESTMENT MANAGEMENT Registered adviser | $12,944,600 | 0.25% | 236,000 | Shares | 2026-07-28 | |
| Small ArchPoint Investors Registered adviser | $12,659,160 | 0.25% | 230,796 | Shares | 2026-08-13 | |
| Mega JANE STREET GROUP, LLC | $12,522,255 | 0.25% | 228,300 | Call | 2026-08-14 | |
| Mega RAYMOND JAMES FINANCIAL INC | $12,231,220 | 0.24% | 222,994 | Shares | 2026-08-14 | |
| Large BESSEMER GROUP INC | $11,936,182 | 0.23% | 217,615 | Shares | 2026-08-12 | |
| Mid Premier Fund Managers Ltd Exempt adviser | $11,319,449 | 0.22% | 206,371 | Shares | 2026-07-22 | |
| Large PEAK6 LLC Broker-dealer | $10,964,515 | 0.22% | 199,900 | Call | 2026-08-13 | |
| Mega RHUMBLINE ADVISERS Registered adviser | $10,865,071 | 0.21% | 198,087 | Shares | 2026-08-12 | |
| Mega Swiss National Bank | $10,163,705 | 0.20% | 185,300 | Shares | 2026-08-11 | |
| Mega AMERIPRISE FINANCIAL INC Adviser | $9,956,974 | 0.20% | 181,531 | Shares | 2026-08-14 | |
| Mid Weiss Asset Management LP Registered adviser | $9,511,867 | 0.19% | 173,416 | Shares | 2026-08-14 | |
| Large BLAIR WILLIAM & CO/IL Registered adviser | $9,461,789 | 0.19% | 172,503 | Shares | 2026-08-11 | |
| Large Cerity Partners LLC Registered adviser | $9,427,342 | 0.19% | 171,875 | Shares | 2026-08-14 | |
| Mid TIG Advisors, LLC Registered adviser | $9,247,710 | 0.18% | 168,600 | Call | 2026-08-14 | |
| Mega CITIGROUP INC Bank | $8,981,411 | 0.18% | 163,745 | Shares | 2026-08-03 | |
| Mega MILLENNIUM MANAGEMENT LLC Registered adviser | $8,403,294 | 0.17% | 153,205 | Shares | 2026-08-14 | |
| Mid Magnetar Financial LLC Registered adviser | $8,402,251 | 0.17% | 153,186 | Shares | 2026-08-14 | |
| Large Retirement Systems of Alabama | $8,304,290 | 0.16% | 151,400 | Shares | 2026-07-28 | |
| Mega Qube Research & Technologies Ltd Exempt adviser | $8,180,438 | 0.16% | 149,142 | Shares | 2026-08-14 | |
| Mega Amundi Holding company | $7,775,316 | 0.15% | 141,756 | Shares | 2026-08-11 | |
| Mid PDT Partners, LLC Registered adviser | $7,580,653 | 0.15% | 138,207 | Shares | 2026-08-14 | |
| Large COMMONWEALTH OF PENNSYLVANIA PUBLIC SCHOOL EMPLS RETRMT SYS | $7,417,914 | 0.15% | 135,240 | Shares | 2026-07-17 | |
| Mid AQR Arbitrage LLC Registered adviser | $7,273,713 | 0.14% | 132,611 | Shares | 2026-08-14 | |
| Mega CITADEL ADVISORS LLC Registered adviser | $7,273,110 | 0.14% | 132,600 | Put | 2026-09-02 | |
| Mega Creative Planning Registered adviser | $7,129,073 | 0.14% | 129,974 | Shares | 2026-08-13 | |
| Mega VICTORY CAPITAL MANAGEMENT INC Registered adviser | $7,047,237 | 0.14% | 128,482 | Shares | 2026-08-07 | |
| Mega LPL Financial LLC Broker-dealer | $6,999,134 | 0.14% | 127,605 | Shares | 2026-08-07 | |
| Mid Inspire Investing, LLC Registered adviser | $6,565,928 | 0.13% | 119,707 | Shares | 2026-08-12 | |
| Large MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | $6,309,613 | 0.12% | 115,034 | Shares | 2026-08-14 | |
| Large NEW YORK STATE TEACHERS RETIREMENT SYSTEM | $6,039,588 | 0.12% | 110,111 | Shares | 2026-07-23 | |
| Mega Allianz Asset Management GmbH | $6,013,424 | 0.12% | 109,634 | Shares | 2026-09-02 | |
| Large CANADA LIFE ASSURANCE Co | $6,004,923 | 0.12% | 109,479 | Shares | 2026-08-13 | |
| Mid Advisors Asset Management, Inc. Registered adviser | $5,859,570 | 0.12% | 106,829 | Shares | 2026-08-14 | |
| Mega CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM Benefit plan | $5,855,072 | 0.12% | 106,747 | Shares | 2026-08-24 | |
| Mega PRICE T ROWE ASSOCIATES INC /MD/ Registered adviser | $5,712,078 | 0.11% | 104,140 | Shares | 2026-08-14 | |
| Large MERCER GLOBAL ADVISORS INC /ADV Registered adviser | $5,710,872 | 0.11% | 104,118 | Shares | 2026-08-19 | |
| Mid XTX Topco Ltd | $5,491,746 | 0.11% | 100,123 | Shares | 2026-08-14 | |
| Large STATE OF WISCONSIN INVESTMENT BOARD Benefit plan | $5,363,123 | 0.11% | 97,778 | Shares | 2026-08-14 | |
| Large PRUDENTIAL FINANCIAL INC Insurer | $5,243,605 | 0.10% | 95,599 | Shares | 2026-08-12 | |
| Large Quantinno Capital Management LP Registered adviser | $4,843,693 | 0.10% | 88,308 | Shares | 2026-08-13 |
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