Skip to main content
Livermore
Livermore
ZHEN

Iridium Communications Inc.

IRDM
Exchange
Nasdaq
Industry
Communications Services, NEC
SEC CIK
0001418819

In the last 90 days, Iridium Communications Inc. insiders filed 0 open-market purchases and 8 sales; 483 institutions reported holding it in 13F filings for Q2 2026, worth $5.01B in total; ARK Invest is the only superinvestor holding it.

Holders of 5% or more of IRDM

Holders whose latest Schedule 13D or 13G filing reports 5% or more of Iridium Communications Inc., largest stake first. The change is against the holder's previous filing.

Holders of 5% or more of IRDM
HolderLatest formStakeChangeFirst filedLatest filingFiling
BlackRock, Inc.13G/A12.50%13.1M shares+2.90 ppfrom 9.60%Feb 5, 20253 filingsJan 8, 2026SEC
Baralonco Ltd13D/A9.44%10.0M shares−0.09 ppfrom 9.53%Aug 26, 20217 filingsAug 4, 2026SEC
AQR Capital Management LLC13G6.60%6.98M sharesNewAug 13, 20261 filingAug 13, 2026SEC
Vanguard Portfolio Management LLC13G5.81%6.10M sharesNewApr 29, 20261 filingApr 29, 2026SEC

Stakes are as of each holder's latest filing. Holders whose last filing was in the old format (before December 18, 2024) have no stake on record and are not listed, and after an acquisition or delisting holders usually stop filing.

13D and 13G filings

45 Schedule 13D and 13G filings on Iridium Communications Inc., newest first, including old-format filings without a stake.

Schedule 13D and 13G filings on IRDM
Filed (ET)FilerFormStakeChangeEvent dateFiling
Aug 13, 20268:58 AM ETAQR Capital Management LLCand 1 other13G6.60%6.98M sharesNewJun 30, 2026SEC
Aug 12, 20263:00 PM ETSilver Heights Capital Management Inc13G/A3.10%3.27M shares−1.90 ppfrom 5.00%Below 5%Jun 30, 2026SEC
Aug 4, 20269:09 PM ETBaralonco Ltdand 2 others13D/A9.44%10.0M shares−0.09 ppfrom 9.53%Jul 31, 2026SEC
Apr 29, 20261:46 PM ETVanguard Portfolio Management LLC13G5.81%6.10M sharesNewMar 31, 2026SEC
Apr 2, 20263:48 PM ETBaralonco Ltdand 2 others13D/A9.53%10.0M shares−0.43 ppfrom 9.96%Apr 2, 2026SEC
Mar 26, 20262:48 PM ETVanguard Group Inc13G/A0.00%0 shares−10.25 ppfrom 10.25%Below 5%Mar 13, 2026SEC
Mar 5, 20261:24 PM ETVanguard Group Inc13G/A10.25%10.8M shares–Feb 27, 2026SEC
Feb 13, 20263:54 PM ETSilver Heights Capital Management Inc13G/A5.00%5.25M shares0.00 ppfrom 5.00%Dec 31, 2025SEC
Feb 13, 202612:08 PM ETSilver Heights Capital Management Inc13G5.00%5.25M sharesNewDec 31, 2025SEC
Jan 8, 20261:28 PM ETBlackRock, Inc.13G/A12.50%13.1M shares+2.90 ppfrom 9.60%Dec 31, 2025SEC
Dec 5, 202510:57 AM ETARK Investment Management LLCand 1 otherSuperinvestorARK Invest13G/A3.93%4.12M shares−2.19 ppfrom 6.12%Below 5%Nov 30, 2025SEC
Nov 26, 20255:02 PM ETBaralonco Ltdand 2 others13D/A9.96%10.4M shares+0.36 ppfrom 9.60%Nov 24, 2025SEC
Nov 14, 202511:24 AM ETBamco Incand 4 others13G/A0.65%683.0K shares−7.10 ppfrom 7.75%Below 5%Sep 30, 2025SEC
Nov 4, 20254:53 PM ETARK Investment Management LLCand 1 otherSuperinvestorARK Invest13G/A6.12%6.49M shares–Sep 30, 2025SEC
Aug 14, 202511:35 AM ETBamco Incand 4 others13G/A7.75%8.38M shares−1.64 ppfrom 9.39%Jun 30, 2025SEC
Jun 26, 20256:05 PM ETBaralonco Ltdand 2 others13D/A9.60%10.4M shares–Jun 24, 2025SEC
Apr 23, 20258:39 PM ETBlackRock, Inc.13G/A9.60%10.5M shares−1.60 ppfrom 11.20%Mar 31, 2025SEC
Feb 5, 20251:23 PM ETBlackRock, Inc.13G/A11.20%12.7M shares–Dec 31, 2024SEC
Nov 14, 202410:09 AM ETBamco Incand 4 others13G/A9.39%11.1M shares–Sep 30, 2024SEC
Nov 13, 2024Capital International Investors13G/AOld format–––SEC
Jun 7, 20241:30 PM ETBlackRock Inc.13G/AOld format–––SEC
Feb 14, 2024Bamco Inc13G/AOld format–––SEC
Feb 13, 2024Vanguard Group Inc13G/AOld format–––SEC
Feb 9, 2024Capital International Investors13G/AOld format–––SEC
Jan 24, 20245:23 PM ETBlackRock Inc.13G/AOld format–––SEC
Feb 14, 2023Bamco Inc13G/AOld format–––SEC
Feb 13, 2023Capital International Investors13G/AOld format–––SEC
Feb 9, 2023Vanguard Group Inc13G/AOld format–––SEC
Jan 26, 20238:49 AM ETBlackRock Inc.13G/AOld format–––SEC
Jan 20, 20235:17 PM ETBlackRock Inc.13GOld format–––SEC
Sep 9, 2022Vanguard Group Inc13G/AOld format–––SEC
Mar 11, 2022Baralonco Ltd13D/AOld format–––SEC
Feb 11, 2022Capital International Investors13G/AOld format–––SEC
Feb 10, 2022Vanguard Group Inc13G/AOld format–––SEC
Feb 9, 2022ARK Investment Management LLCSuperinvestorARK Invest13G/AOld format–––SEC
Jan 27, 20225:13 PM ETBlackRock Inc.13G/AOld format–––SEC
Jan 26, 20229:16 AM ETBlackRock Inc.13G/AOld format–––SEC
Jan 7, 2022Bamco Inc13G/AOld format–––SEC
Nov 26, 2021Baralonco Ltd13D/AOld format–––SEC
Aug 26, 2021Baralonco Ltd13D/AOld format–––SEC
Jul 9, 2021ARK Investment Management LLCSuperinvestorARK Invest13G/AOld format–––SEC
Feb 16, 2021Capital International Investors13GOld format–New–SEC
Feb 16, 2021ARK Investment Management LLCSuperinvestorARK Invest13GOld format–New–SEC
Feb 10, 2021Vanguard Group Inc13G/AOld format–––SEC
Jan 26, 20212:22 PM ETBlackRock Inc.13G/AOld format–––SEC

Form 144: proposed insider sales

8 notices from officers, directors and other affiliates planning to sell Iridium Communications Inc. shares, newest first.

Form 144 notices for IRDM
Filed (ET)SellerShares to sellMarket valuePlanned saleBrokerFiling
Mar 7, 202410:28 AM ETHarman Jane L.Director3.80K$107.9KMar 6, 2024Morgan Stanley Smith Barney LLC Executive ServicesSEC
Mar 5, 20245:27 PM ETRush Parker WilliamDirector5.57K$162.4KMar 5, 2024MORGAN STANLEY SMITH BARNEY LLC EXECUTIVE SERVICESSEC
Feb 23, 20246:21 PM ETRush Parker WilliamDirector4.00K$114.4KFeb 23, 2024MORGAN STANLEY SMITH BARNEY LLC EXECUTIVE SERVICESSEC
Jun 7, 20234:58 PM ETMatthew J. DeschAffiliate25.0K$1.60MJun 7, 202310b5-1J.P. Morgan Securities LLCSEC
May 11, 20236:31 PM ETSchliemann Henrik O.Director1.90K$118.6KMay 11, 2023ETRADE FINANCIAL CORPORATIONSEC
May 5, 20235:18 PM ETWest BarryDirector1.88K$120.5KMay 5, 2023ETRADE FINANCIAL CORPORATIONSEC
May 1, 20232:36 PM ETNiehaus Robert HDirector55.8K$3.54MMay 1, 2023ETRADE FINANCIAL CORPORATIONSEC
Apr 25, 20232:17 PM ETHartin Bryan J.Officer36.0K$2.37MApr 25, 2023ETRADE FINANCIAL CORPORATIONSEC