IRIDIUM COMMUNICATIONS INC IRDM
COM · Common Stock · CUSIP 46269C102 · ISIN US46269C1027
Satellite communications provider
- SectorCommunication
- IndustryCommunications Services, NEC
- HeadquartersMclean, VA
- Founded2001
- Websiteiridium.com
- FilingsSEC EDGAR
* Summed across managers. Shares that two managers' reports both contain – a subsidiary's holdings that its parent's report includes too, or a sub-adviser's in its client's – are counted once ($79.2m this quarter). Holder counts are more reliable. Shares outstanding: 104.7m as of 2025-10-16, from the company's own SEC filing; the percentage can still exceed 100%: lent-out shares are counted by the lender and the buyer, and some reports overlap without saying so. Implied quarter-end price ≈ $17.63. Options: 12 managers hold calls ($10.4m notional), 10 hold puts ($11.0m).
Trends to Q3 2025
Institutional holders
Managers reporting a position, each quarter
Numbers
| Quarter | Holders |
|---|---|
| Q3 2022 | 331 |
| Q4 2022 | 364 |
| Q1 2023 | 372 |
| Q2 2023 | 392 |
| Q3 2023 | 361 |
| Q4 2023 | 347 |
| Q1 2024 | 332 |
| Q2 2024 | 344 |
| Q3 2024 | 353 |
| Q4 2024 | 349 |
| Q1 2025 | 352 |
| Q2 2025 | 334 |
| Q3 2025 | 324 |
Buyers vs sellers
Managers adding to or starting a position, vs cutting or selling out
Numbers
| Quarter | Bought or added | Cut or sold out |
|---|---|---|
| Q4 2023 | 133 | 198 |
| Q1 2024 | 186 | 164 |
| Q2 2024 | 168 | 170 |
| Q3 2024 | 163 | 171 |
| Q4 2024 | 161 | 177 |
| Q1 2025 | 182 | 165 |
| Q2 2025 | 155 | 212 |
| Q3 2025 | 177 | 178 |
Calls vs puts
Options held, notional value, last 4 quarters. P/C = puts ÷ calls
Numbers
| Quarter | Calls | Puts | P/C |
|---|---|---|---|
| Q4 2024 | $7.8m | $10.8m | 1.38 |
| Q1 2025 | $12.7m | $9.7m | 0.76 |
| Q2 2025 | $20.4m | $29.6m | 1.45 |
| Q3 2025 | $10.4m | $11.0m | 1.05 |
Biggest buyers
| MILLENNIUM MANAGEMENT LLC | Added | +2.2m |
| GOLDMAN SACHS GROUP INC | Added | +1.8m |
| Man Group plc | Added | +1.4m |
| ARK Investment Management LLC | Added | +1.2m |
| Silver Heights Capital Management Inc | Added | +961.4k |
| BANK OF AMERICA CORP /DE/ | Added | +877.8k |
| Pacer Advisors, Inc. | Added | +744.8k |
| M&G PLC | New | +680.9k |
| JPMORGAN CHASE & CO | Added | +662.8k |
| Synergy Asset Management, LLC | Added | +662.2k |
Biggest sellers
| BAMCO INC /NY/ | Reduced | -7.7m |
| Van Berkom & Associates Inc. | Sold out | -2.9m |
| PRICE T ROWE ASSOCIATES INC /MD/ | Reduced | -1.9m |
| ArrowMark Colorado Holdings LLC | Sold out | -1.3m |
| SCHRODER INVESTMENT MANAGEMENT GROUP | Reduced | -1.1m |
| Gotham Asset Management, LLC | Reduced | -643.7k |
| MORGAN STANLEY | Reduced | -643.5k |
| NORTHERN TRUST CORP | Reduced | -593.2k |
| VOYA INVESTMENT MANAGEMENT LLC | Reduced | -549.4k |
| FMR LLC | Reduced | -511.9k |
Biggest calls
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Added | $3.0m169.3k shares |
| GROUP ONE TRADING LLC | Added | $2.2m127.6k shares |
| JANE STREET GROUP, LLC | Added | $1.2m71.2k shares |
| IMC-Chicago, LLC | Added | $1.2m66.0k shares |
| Walleye Capital LLC | Added | $632.1k36.2k shares |
| WOLVERINE TRADING, LLC | Reduced | $601.3k34.8k shares |
| CITADEL ADVISORS LLC | Reduced | $497.6k28.5k shares |
| SIMPLEX TRADING, LLC | Reduced | $406.0k23.3k shares |
| Walleye Trading LLC | Added | $204.3k11.7k shares |
| CAPITAL FUND MANAGEMENT S.A. | New | $202.5k11.6k shares |
Biggest puts
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Added | $4.0m231.8k shares |
| CITADEL ADVISORS LLC | Added | $2.7m156.7k shares |
| PEAK6 LLC | Reduced | $939.3k53.8k shares |
| IMC-Chicago, LLC | New | $754.3k43.2k shares |
| GROUP ONE TRADING LLC | Added | $717.6k41.1k shares |
| WOLVERINE TRADING, LLC | Added | $618.6k35.8k shares |
| SIMPLEX TRADING, LLC | Added | $522.0k29.9k shares |
| JANE STREET GROUP, LLC | New | $459.2k26.3k shares |
| Walleye Capital LLC | Reduced | $155.4k8.9k shares |
| Walleye Trading LLC | Reduced | $1.7k100 shares |
Options at notional value: the value of the shares the contracts control, as filers report them, not what the options cost. Not included in the holders, shares or buying above.
Major shareholders (over 5%)
Anyone who owns more than 5% of a class of the company's shares has to say so: on Schedule 13D if they may try to influence or control the company, on 13G if they're a passive investor, and update it as the stake changes. Each holder's latest filing, from 19 Dec 2024 on; percentages are of the share class, as the holder worked them out.
| Holder | Stake |
|---|---|
| BlackRock, Inc. 13G · institution +2.9 pts · filed 2026-01-08 | 12.5% |
| Baralonco Ltd 13D · may seek influence -0.1 pts · filed 2026-08-04 | 9.4% |
| AQR CAPITAL MANAGEMENT LLC 13G · institution new · filed 2026-08-13 | 6.6% |
| VANGUARD PORTFOLIO MANAGEMENT LLC 13G · institution new · filed 2026-04-29 | 5.8% |
Fell to 5% or below in the last year: Silver Heights Capital Management Inc (3.1%, 2026-08-12), VANGUARD GROUP INC (0.0%, 2026-03-26; now reported by VANGUARD PORTFOLIO MANAGEMENT LLC), ARK Investment Management LLC (3.9%, 2025-12-05), BAMCO INC /NY/ (0.7%, 2025-11-14)
Insider purchases and sales in Q3 2025
Shares bought or sold by the company's own officers, directors and 10% owners, in the open market or privately, as they reported to the SEC on Form 4 (due within two business days of the trade). Grants, option exercises, shares withheld for tax and gifts aren't included.
Officers and directors buying vs selling
Number of people, by quarter (10% owners not included)
Numbers
| Quarter | Buying | Bought | Selling | Sold | Sold under a plan |
|---|---|---|---|---|---|
| Q4 2023 | 1 | $1.0m | 0 | — | — |
| Q1 2024 | 0 | — | 1 | $107.9k | — |
| Q2 2024 | 0 | — | 0 | — | — |
| Q3 2024 | 0 | — | 0 | — | — |
| Q4 2024 | 0 | — | 2 | $1.3m | — |
| Q1 2025 | 0 | — | 4 | $1.0m | $358.3k |
| Q2 2025 | 0 | — | 1 | $50.1k | — |
| Q3 2025 | 0 | — | 0 | — | — |
None reported in Q3 2025.
Holders, Q3 2025
| Manager | Shares | Change |
|---|---|---|
| BlackRock, Inc. 0.00% of their portfolio | 11.0m $192.0m | Added +379.6k |
| VANGUARD GROUP INC 0.00% of their portfolio | 9.5m $165.5m | Reduced -258.5k |
| ARK Investment Management LLC 0.67% of their portfolio | 6.5m $113.3m | Added +1.2m |
| Silver Heights Capital Management Inc 40.63% of their portfolio | 5.2m $90.6m | Added +961.4k |
| Sumitomo Mitsui Trust Group, Inc. 0.04% of their portfolio | 4.3m $75.8m | Added +27.9k |
| Amova Asset Management Americas, Inc. 0.73% of their portfolio | 4.3m $75.3m | Added +2.8k |
| STATE STREET CORP 0.00% of their portfolio | 4.0m $70.5m | Reduced -40.5k |
| MILLENNIUM MANAGEMENT LLC 0.04% of their portfolio | 3.0m $53.1m | Added +2.2m |
| AMERICAN CENTURY COMPANIES INC 0.03% of their portfolio | 2.9m $50.3m | Added +238.2k |
| DIMENSIONAL FUND ADVISORS LP 0.01% of their portfolio | 2.3m $40.6m | Reduced -228.9k |
| Man Group plc 0.07% of their portfolio | 2.0m $35.1m | Added +1.4m |
| GOLDMAN SACHS GROUP INC 0.00% of their portfolio | 1.9m $33.4m | Added +1.8m |
| MORGAN STANLEY 0.00% of their portfolio | 1.8m $32.1m | Reduced -643.5k |
| Pacer Advisors, Inc. 0.08% of their portfolio | 1.7m $30.5m | Added +744.8k |
| GEODE CAPITAL MANAGEMENT, LLC 0.00% of their portfolio | 1.7m $29.8m | Reduced -215.2k |
| CITADEL ADVISORS LLC 0.02% of their portfolio | 1.6m $28.8m | Added +437.0k |
| BANK OF AMERICA CORP /DE/ 0.00% of their portfolio | 1.6m $27.6m | Added +877.8k |
| UBS Group AG 0.00% of their portfolio | 1.4m $23.9m | Added +636.4k |
| Synergy Asset Management, LLC 1.45% of their portfolio | 1.3m $40.0m | Added +662.2k |
| JPMORGAN CHASE & CO 0.00% of their portfolio | 1.2m $21.4m | Added +662.8k |
| Bank of New York Mellon Corp 0.00% of their portfolio | 1.1m $18.7m | Reduced -69.0k |
| Select Equity Group, L.P. 0.08% of their portfolio | 1.1m $18.5m | Added +60.1k |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.00% of their portfolio | 1.0m $18.2m | Added +17.1k |
| NORTHERN TRUST CORP 0.00% of their portfolio | 1.0m $18.2m | Reduced -593.2k |
| SCHRODER INVESTMENT MANAGEMENT GROUP 0.01% of their portfolio | 992.6k $17.2m | Reduced -1.1m |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP 0.01% of their portfolio | 937.6k $16.4m | Added +560.0k |
| Invesco Ltd. 0.00% of their portfolio | 887.3k $15.5m | Added +178.9k |
| JUPITER ASSET MANAGEMENT LTD 0.13% of their portfolio | 850.0k $14.8m | Added +495.0k |
| Penserra Capital Management LLC 0.16% of their portfolio | 776.6k $13.6m | Added +360.0k |
| VAN ECK ASSOCIATES CORP 0.01% of their portfolio | 762.7k $13.3m | Added +430.7k |
| TWO SIGMA INVESTMENTS, LP 0.02% of their portfolio | 739.6k $12.9m | Added +568.0k |
| ANCHOR CAPITAL MANAGEMENT COMPANY, LLC 11.05% of their portfolio | 735.4k $12.8m | Reduced -155.6k |
| BAMCO INC /NY/ 0.03% of their portfolio | 682.9k $11.9m | Reduced -7.7m |
| M&G PLC 0.06% of their portfolio | 680.9k $11.6m | New |
| TUDOR INVESTMENT CORP ET AL 0.07% of their portfolio | 660.9k $11.5m | New |
| PINNACLE ASSOCIATES LTD 0.14% of their portfolio | 607.5k $10.6m | Added +24.6k |
| Trexquant Investment LP 0.10% of their portfolio | 569.8k $9.9m | Added +532.1k |
| BARCLAYS PLC 0.00% of their portfolio | 537.9k $9.4m | Reduced -337.8k |
| BROWN ADVISORY INC 0.01% of their portfolio | 512.9k $9.0m | Added +33 |
| JANE STREET GROUP, LLC 0.01% of their portfolio | 504.5k $8.8m | Added +152.9k |
| Qube Research & Technologies Ltd 0.01% of their portfolio | 466.6k $8.1m | Added +456.4k |
| RAYMOND JAMES FINANCIAL INC 0.00% of their portfolio | 432.1k $7.5m | Reduced -169.2k |
| FIRST TRUST ADVISORS LP 0.01% of their portfolio | 414.7k $7.2m | Added +131.1k |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC 0.00% of their portfolio | 406.6k $7.1m | Reduced -245.7k |
| IQ EQ FUND MANAGEMENT (IRELAND) Ltd 0.46% of their portfolio | 385.3k $6.7m | Added +216.5k |
| FMR LLC 0.00% of their portfolio | 382.4k $6.7m | Reduced -511.9k |
| VOLORIDGE INVESTMENT MANAGEMENT, LLC 0.02% of their portfolio | 380.3k $6.6m | New |
| Nuveen, LLC 0.00% of their portfolio | 369.0k $6.4m | Reduced -3.4k |
| Y-Intercept (Hong Kong) Ltd 0.14% of their portfolio | 345.2k $6.0m | Added +331.7k |
| Legal & General Group Plc 0.00% of their portfolio | 323.7k $5.7m | Reduced -21.8k |
| DARK FOREST CAPITAL MANAGEMENT LP 0.21% of their portfolio | 318.7k $5.6m | Added +254.4k |
| NORDEA INVESTMENT MANAGEMENT AB 0.00% of their portfolio | 317.9k $5.5m | Added +3.2k |
| CITIGROUP INC 0.00% of their portfolio | 310.8k $5.4m | Added +237.5k |
| Gotham Asset Management, LLC 0.02% of their portfolio | 307.5k $5.4m | Reduced -643.7k |
| Crossmark Global Holdings, Inc. 0.08% of their portfolio | 299.6k $5.2m | Added +15.2k |
| Balyasny Asset Management L.P. 0.01% of their portfolio | 293.4k $5.1m | New |
| Engineers Gate Manager LP 0.06% of their portfolio | 292.3k $5.1m | Added +257.0k |
| Robertson Opportunity Capital, LLC 1.72% of their portfolio | 287.3k $5.0m | Added +4.0k |
| Retirement Systems of Alabama 0.02% of their portfolio | 279.7k $4.9m | Reduced -3.9k |
| RHUMBLINE ADVISERS 0.00% of their portfolio | 267.1k $4.7m | Reduced -18.7k |
| VICTORY CAPITAL MANAGEMENT INC 0.00% of their portfolio | 249.6k $4.4m | Added +135.4k |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP 0.01% of their portfolio | 239.4k $4.2m | Added +176.1k |
| PRINCIPAL FINANCIAL GROUP INC 0.00% of their portfolio | 235.5k $4.1m | Reduced -9.4k |
| BLAIR WILLIAM & CO/IL 0.01% of their portfolio | 227.7k $4.0m | Added +28.1k |
| TWO SIGMA ADVISERS, LP 0.01% of their portfolio | 225.7k $3.9m | Added +185.9k |
| Carolina Wealth Advisors, LLC 1.55% of their portfolio | 205.5k $3.6m | Added +203.0k |
| ALLIANCEBERNSTEIN L.P. 0.00% of their portfolio | 198.1k $3.5m | Added +53.6k |
| ArchPoint Investors 0.94% of their portfolio | 195.7k $3.4m | Added +102.1k |
| Swiss National Bank 0.00% of their portfolio | 188.7k $3.3m | Added +1.8k |
| COMMONWEALTH OF PENNSYLVANIA PUBLIC SCHOOL EMPLS RETRMT SYS 0.02% of their portfolio | 180.8k $3.2m | Added +15.3k |
| VOYA INVESTMENT MANAGEMENT LLC 0.00% of their portfolio | 175.7k $3.1m | Reduced -549.4k |
| STATE OF WISCONSIN INVESTMENT BOARD 0.01% of their portfolio | 172.4k $3.0m | Added +254 |
| Mitsubishi UFJ Asset Management Co., Ltd. 0.00% of their portfolio | 172.3k $3.0m | Added +20.9k |
| WORLDQUANT MILLENNIUM ADVISORS LLC 0.01% of their portfolio | 170.7k $3.0m | New |
| BNP PARIBAS FINANCIAL MARKETS 0.00% of their portfolio | 157.0k $2.7m | Added +16.5k |
| Squarepoint Ops LLC 0.01% of their portfolio | 152.7k $2.7m | Added +138.2k |
| TWINBEECH CAPITAL LP 0.10% of their portfolio | 140.3k $2.4m | New |
| CAPITAL FUND MANAGEMENT S.A. 0.02% of their portfolio | 139.2k $2.4m | Added +41.4k |
| Holocene Advisors, LP 0.01% of their portfolio | 136.8k $2.4m | Added +76.5k |
| AGF MANAGEMENT LTD 0.01% of their portfolio | 132.5k $2.3m | Added +16.3k |
| AQR CAPITAL MANAGEMENT LLC 0.00% of their portfolio | 128.1k $2.2m | Reduced -78.5k |
| Amundi 0.00% of their portfolio | 126.8k $2.5m | New |
| Russell Investments Group, Ltd. 0.00% of their portfolio | 121.4k $2.1m | Added +84.7k |
| ExodusPoint Capital Management, LP 0.03% of their portfolio | 118.1k $2.1m | Added +110.1k |
| Bridgewater Associates, LP 0.01% of their portfolio | 116.7k $2.0m | New |
| Weiss Asset Management LP 0.03% of their portfolio | 116.1k $2.0m | Added +78.1k |
| NEW YORK STATE TEACHERS RETIREMENT SYSTEM 0.00% of their portfolio | 113.8k $2.0m | Reduced -555 |
| STIFEL FINANCIAL CORP 0.00% of their portfolio | 112.9k $2.0m | Added +73.1k |
| Verition Fund Management LLC 0.01% of their portfolio | 110.4k $1.9m | Added +18.6k |
| XTX Topco Ltd 0.10% of their portfolio | 107.8k $1.9m | New |
| ROYAL BANK OF CANADA 0.00% of their portfolio | 106.8k $1.9m | Reduced -143.5k |
| PRICE T ROWE ASSOCIATES INC /MD/ 0.00% of their portfolio | 105.2k $1.8m | Reduced -1.9m |
| Brevan Howard Capital Management LP 0.03% of their portfolio | 100.7k $1.8m | Added +69.8k |
| Paralel Advisors LLC 0.07% of their portfolio | 97.9k $1.7m | Added +128 |
| AMERIPRISE FINANCIAL INC 0.00% of their portfolio | 93.4k $1.6m | Reduced -35.1k |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM 0.00% of their portfolio | 92.0k $1.6m | Reduced -5.9k |
| PDT Partners, LLC 0.10% of their portfolio | 90.2k $1.6m | New |
| SHERBROOKE PARK ADVISERS LLC 0.73% of their portfolio | 89.3k $1.6m | Added +73.3k |
| State of New Jersey Common Pension Fund D 0.01% of their portfolio | 88.1k $1.5m | Added +14.3k |
| GSA CAPITAL PARTNERS LLP 0.13% of their portfolio | 88.0k $1.5m | Added +69.1k |