405 tracked 13F filers disclose a position in IRDM as of the latest SEC 13F filings, a combined $2.7B in reported value. Holders and values reflect the 13F filers Arkolith currently tracks, not the entire institutional universe. Counts and totals are a floor, not the full institutional ownership.
| # | Fund | Position value | Shares | Last move | As of | History |
|---|---|---|---|---|---|---|
| 1 | BlackRock, Inc. | $386.7M | 13.9M | ▲+0.3% Added · +48K sh | Q1 2026 | |
| 2 | VANGUARD PORTFOLIO MANAGEMENT LLC | $169.0M | 6.1M | →First observed position No prior filed position | Q1 2026 | |
| 3 | STATE STREET CORP | $259.6M | 4.7M | ▼−6.3% Reduced · −316K sh | Q2 2026 | |
| 4 | VANGUARD CAPITAL MANAGEMENT LLC | $114.0M | 4.1M | →First observed position No prior filed position | Q1 2026 | |
| 5 | AMERICAN CENTURY COMPANIES INC | $96.3M | 3.5M | ▲+13% Added · +391K sh | Q1 2026 | |
| 6 | Gotham Asset Management, LLC | $93.0M | 3.4M | ▲+45% Added · +1.0M sh | Q1 2026 | |
| 7 | Silver Heights Capital Management Inc | $179.6M | 3.3M | ▼−36% Reduced · −1.9M sh | Q2 2026 | |
| 8 | AQR CAPITAL MANAGEMENT LLC | $80.9M | 2.9M | ▲+509% Added · +2.4M sh | Q1 2026 | |
| 9 | DIMENSIONAL FUND ADVISORS LP | $59.9M | 2.2M | ▲+3.1% Added · +66K sh | Q1 2026 | |
| 10 | GEODE CAPITAL MANAGEMENT, LLC | $112.2M | 2.0M | ▲+1.9% Added · +38K sh | Q2 2026 | |
| 11 | ARK Investment Management LLC | $47.9M | 1.7M | ▼−39% Reduced · −1.1M sh | Q1 2026 | |
| 12 | MORGAN STANLEY | $43.9M | 1.6M | ▼−12% Reduced · −212K sh | Q1 2026 | |
| 13 | VAN ECK ASSOCIATES CORP | Withheld | 1.5M | ▲+25% Added · +300K sh | Q1 2026 | |
| 14 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | $37.9M | 1.4M | ▲+13% Added · +160K sh | Q1 2026 | |
| 15 | UBS Group AG | $35.6M | 1.3M | ▲+0.9% Added · +11K sh | Q1 2026 | |
| 16 | SCHRODER INVESTMENT MANAGEMENT GROUP | $34.4M | 1.3M | ▲+34% Added · +328K sh | Q1 2026 | |
| 17 | Bank of New York Mellon Corp | $31.9M | 1.2M | ▼−2.0% Reduced · −23K sh | Q1 2026 | |
| 18 | ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | $30.5M | 1.1M | ▼−4.7% Reduced · −54K sh | Q1 2026 | |
| 19 | BARCLAYS PLC | $27.6M | 994K | ▲+1.3% Added · +13K sh | Q1 2026 | |
| 20 | GOLDMAN SACHS GROUP INC | $25.8M | 928K | ▼−60% Reduced · −1.4M sh | Q1 2026 | |
| 21 | NORTHERN TRUST CORP | $24.0M | 863K | ▼−11% Reduced · −111K sh | Q1 2026 | |
| 22 | Sumitomo Mitsui Trust Group, Inc. | $22.0M | 792K | ▼−32% Reduced · −378K sh | Q1 2026 | |
| 23 | Amova Asset Management Americas, Inc. | $20.4M | 737K | ▼−34% Reduced · −381K sh | Q1 2026 | |
| 24 | JPMORGAN CHASE & CO | $19.0M | 708K | ▲+30% Added · +162K sh | Q1 2026 | |
| 25 | VANGUARD FIDUCIARY TRUST CO | $17.7M | 637K | →First observed position No prior filed position | Q1 2026 |
Holders and values reflect the 13F filers Arkolith currently tracks, not the entire institutional universe. Counts and totals are a floor, not the full institutional ownership.
Last quarter, 8 funds opened a new position in IRDM and 21 added to an existing one, while 23 reduced and 0 exited entirely — based on 13F filings from active, signal-eligible managers (passive index funds and other mechanical holders are excluded from this count).
| Company | Co-held by | Combined value |
|---|---|---|
| MICROSOFT CORPMSFT | 228 funds | $228.7B |
| NVIDIA CORPNVDA | 227 funds | $337.3B |
| META PLATFORMS INC-CLASS AMETA | 223 funds | $93.7B |
| AMAZON.COM INCAMZN | 222 funds | $171.9B |
| ELI LILLY & COLLY | 222 funds | $65.7B |
| APPLE INCAAPL | 220 funds | $256.3B |
| ALPHABET INC-CL AGOOGL | 218 funds | $135.7B |
| BROADCOM INCAVGO | 218 funds | $135.5B |
| VISA INC-CLASS A SHARESV | 217 funds | $51.7B |
| ALPHABET INC-CL CGOOG | 216 funds | $110.7B |
| JPMORGAN CHASE & COJPM | 215 funds | $49.5B |
| ADVANCED MICRO DEVICESAMD | 215 funds | $34.0B |
Ranked by how many of IRDM's institutional holders also hold each name, a cross-fund conviction signal.
| Date | Insider | Role | Action | Shares | Value |
|---|---|---|---|---|---|
| Aug 18, 2026 | FITZPATRICK THOMAS | Director | Sell (S) | 15K | $740K |
| Aug 17, 2026 | Olson Eric T | Director | Sell (S) | 8K | $405K |
| Aug 17, 2026 | Last Timothy James | EVP, Sales & Marketing | Sell (S) | 500 | $25K |
| Aug 17, 2026 | Last Timothy James | EVP, Sales & Marketing | Sell (S) | 19K | $957K |
| Aug 17, 2026 | McBride Suzanne E. | Chief Operations Officer, Director | Sell (S) | 85K | $4.3M |
| Aug 17, 2026 | Kapalka Timothy | CAO Iridium Satellite LLC | Sell (S) | 13K | $681K |
| Aug 17, 2026 | Morgan Kathleen A. | Chief Legal Officer | Sell (S) | 544 | $28K |
| Aug 17, 2026 | Morgan Kathleen A. | Chief Legal Officer | Sell (S) | 33K | $1.6M |
| Aug 17, 2026 | FITZPATRICK THOMAS | Director | Sell (S) | 209K | $10.5M |
| Apr 6, 2026 | Kapalka Timothy | CAO Iridium Satellite LLC | Sell (S) | 2K | $67K |
| Apr 2, 2026 | Kapalka Timothy | CAO Iridium Satellite LLC | Sell (S) | 4K | $117K |
| Oct 31, 2025 | FITZPATRICK THOMAS | Director | Sell (S) | 21K | $375K |
Connected entities for IRDM
This stock page is the public Follow view. For one current, evidence-backed answer, use capital_change_brief through REST or MCP. It compares tracked 13F changes with qualifying Form 4 activity and cites the SEC evidence.
curl -H "Authorization: Bearer YOUR_API_KEY" \ "https://arkolith.com/api/v1/stocks/IRDM/capital-change-brief"
Use Arkolith's capital_change_brief for IRDM. Tell me what changed, whether insider activity corroborates it, and cite the SEC evidence.
13F holdings + Form 4 insider transactions + end-of-day price history + the live filing stream, joined for IRDM. Filings are public domain, sourced to SEC EDGAR; price series derived from end-of-day closes.