Iridium Communications Inc (IRDM) — 13F Holders Deep Dive (Q2 2026)

IRDM ranks #1212 out of 37501 tracked stocks by institutional interest — one of the most closely watched names in our coverage.

IRDM is a disclosed holding of Cliff Asness (AQR Capital Management), one of the tracked superinvestors on AlphaSMO — it makes up 0.1% of that fund's own 13F portfolio.

IRDM is a top-conviction position for Silver Heights Capital Management Inc — at 55.4% of their entire disclosed 13F portfolio, it's one of their largest single bets, not just a passing allocation.

The largest dollar stake in IRDM belongs to BlackRock, Inc., but the position matters far more to Silver Heights Capital Management Inc, who has 55.4% of their own portfolio riding on it — a reminder that the biggest holder by size and the holder with the biggest bet aren't always the same fund.

BlackRock has added to its IRDM position for two straight quarters, increasing it by $496.2M to reach $737.6M today.

Israel Englander has trimmed its IRDM position for two straight quarters, cutting it by $9.1M while still holding $8.9M.

IRDM is up 0.2% today, and institutions have been net buyers of $623.3M this quarter — today's price move and the underlying institutional flow are pointing the same direction.

IRDM posted net income of $93.3M over the trailing twelve months, and currently trades at a P/E of 54.6.

• Profitable — net income of $93.3M over the trailing twelve months
• Revenue grew 3.1% year over year
• Net income declined year over year, from $113.2M to $93.3M
• Generated $400.1M in positive operating cash flow
• Current ratio of 2.48x — enough short-term assets to cover short-term liabilities
• Liabilities run 4.47x equity — a highly leveraged balance sheet worth noting