IRDM US Equity

Iridium Communications Inc.

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Communication Services · Communications Services, NEC · CIK 1418819 · FYE 1231

$44.36

-1.08 (-2.38%)

USD · as of 2026-07-29 · marketstack

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Institutional ownership· 13F filers holding IRDM · 2026-Q1 methodology → sources →

377 holders

% of shares outstanding held

84.3%

Shares held (13F)

89,325,086

Reporting holders

377

Top holders

largest 100 of 377 · Δ vs 2025-Q4

#	Holder	Shares	Value	% of shares out	Δ QoQ
1	BlackRock, Inc.	13,939,61813.9M	$387M	13.16%	—
2	VANGUARD PORTFOLIO MANAGEMENT LLC	6,091,7496.1M	$169M	5.75%	NEW†
3	Silver Heights Capital Management Inc	5,145,4795.1M	$143M	4.86%	TRIM -2%
4	STATE STREET CORP	5,050,1665.1M	$140M	4.77%	ADD 6%
5	VANGUARD CAPITAL MANAGEMENT LLC	4,111,3254.1M	$114M	3.88%	NEW†
6	AMERICAN CENTURY COMPANIES INC	3,469,9543.5M	$96M	3.27%	ADD 13%
7	Gotham Asset Management, LLC	3,353,9713.4M	$93M	3.17%	ADD 45%
8	AQR CAPITAL MANAGEMENT LLC	2,917,8272.9M	$81M	2.75%	ADD 509%
9	DIMENSIONAL FUND ADVISORS LP	2,159,0612.2M	$60M	2.04%	ADD 3%
10	GEODE CAPITAL MANAGEMENT, LLC	2,007,0112.0M	$56M	1.89%	ADD 5%
11	Man Group plc	1,907,0441.9M	$53M	1.80%	ADD 3%
12	ARK Investment Management LLC	1,726,8021.7M	$48M	1.63%	TRIM -39%
13	MORGAN STANLEY	1,583,3371.6M	$44M	1.49%	TRIM -12%
14	VAN ECK ASSOCIATES CORP	1,504,6281.5M	$42M	1.42%	ADD 25%
15	CHARLES SCHWAB INVESTMENT MANAGEMENT INC	1,366,0051.4M	$38M	1.29%	ADD 13%
16	UBS Group AG	1,284,5611.3M	$36M	1.21%	—
17	SCHRODER INVESTMENT MANAGEMENT GROUP	1,282,6391.3M	$34M	1.21%	ADD 34%
18	Bank of New York Mellon Corp	1,150,4501.2M	$32M	1.09%	—
19	ARROWSTREET CAPITAL, LIMITED PARTNERSHIP	1,101,2311.1M	$31M	1.04%	TRIM -5%
20	BARCLAYS PLC	994,069994,069	$28M	0.94%	—
21	Invesco Ltd.	987,926987,926	$27M	0.93%	—
22	Select Equity Group, L.P.	942,519942,519	$26M	0.89%	ADD 13%
23	GOLDMAN SACHS GROUP INC	928,388928,388	$26M	0.88%	TRIM -60%
24	JUPITER ASSET MANAGEMENT LTD	893,282893,282	$25M	0.84%	ADD 11%
25	NORTHERN TRUST CORP	863,494863,494	$24M	0.81%	TRIM -11%
26	Sumitomo Mitsui Trust Group, Inc.	791,773791,773	$22M	0.75%	TRIM -32%
27	Penserra Capital Management LLC	755,728755,728	$21M	0.71%	TRIM -11%
28	Amova Asset Management Americas, Inc.	736,973736,973	$20M	0.70%	TRIM -34%
29	JPMORGAN CHASE & CO	708,297708,297	$19M	0.67%	ADD 30%
30	VANGUARD FIDUCIARY TRUST CO	636,855636,855	$18M	0.60%	NEW
31	PINNACLE ASSOCIATES LTD	562,741562,741	$16M	0.53%	TRIM -7%
32	FMR LLC	540,053540,053	$15M	0.51%	ADD 17%
33	Mitsubishi UFJ Asset Management Co., Ltd.	538,427538,427	$15M	0.51%	ADD 36%
34	PANAGORA ASSET MANAGEMENT INC	529,520529,520	$15M	0.50%	NEW
35	BROWN ADVISORY INC	512,576512,576	$14M	0.48%	—
36	PRINCIPAL FINANCIAL GROUP INC	508,290508,290	$14M	0.48%	ADD 2%
37	MILLENNIUM MANAGEMENT LLC	494,662494,662	$14M	0.47%	TRIM -52%
38	Nuveen, LLC	425,145425,145	$12M	0.40%	TRIM -29%
39	TWO SIGMA INVESTMENTS, LP	402,428402,428	$11M	0.38%	TRIM -43%
40	STIFEL FINANCIAL CORP	397,887397,887	$11M	0.38%	ADD 31%
41	Legal & General Group Plc	378,692378,692	$11M	0.36%	TRIM -8%
42	Public Sector Pension Investment Board	375,511375,511	$10M	0.35%	ADD 4%
43	RAYMOND JAMES FINANCIAL INC	368,276368,276	$10M	0.35%	ADD 13%
44	UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC	359,530359,530	$10M	0.34%	—
45	Russell Investments Group, Ltd.	352,947352,947	$10M	0.33%	ADD 15%
46	FIRST TRUST ADVISORS LP	352,249352,249	$10M	0.33%	TRIM -18%
47	BANK OF AMERICA CORP /DE/	351,234351,234	$10M	0.33%	ADD 62%
48	JANUS HENDERSON GROUP PLC	306,684306,684	$9M	0.29%	ADD 10%
49	SUSQUEHANNA INTERNATIONAL GROUP, LLP	291,694291,694	$8M	0.28%	ADD 70%
50	Robertson Opportunity Capital, LLC	287,346287,346	$8M	0.27%	NEW
51	CX Institutional	272,787272,787	$8M	0.26%	NEW
52	Defiance ETFs, LLC	255,175255,175	$7M	0.24%	TRIM -55%
53	NORDEA INVESTMENT MANAGEMENT AB	255,788255,788	$7M	0.24%	TRIM -4%
54	RHUMBLINE ADVISERS	234,248234,248	$6M	0.22%	ADD 4%
55	AMERIPRISE FINANCIAL INC	233,301233,301	$6M	0.22%	ADD 18%
56	BLAIR WILLIAM & CO/IL	220,251220,251	$6M	0.21%	TRIM -6%
57	VICTORY CAPITAL MANAGEMENT INC	219,206219,206	$6M	0.21%	TRIM -32%
58	BESSEMER GROUP INC	217,485217,485	$6M	0.21%	ADD 54682%
59	ArchPoint Investors	197,066197,066	$5M	0.19%	—
60	LOS ANGELES CAPITAL MANAGEMENT LLC	192,128192,128	$5M	0.18%	ADD 57770%
61	Swiss National Bank	186,400186,400	$5M	0.18%	—
62	COMMONWEALTH OF PENNSYLVANIA PUBLIC SCHOOL EMPLS RETRMT SYS	161,046161,046	$4M	0.15%	TRIM -9%
63	MORGENS WATERFALL VINTIADIS & CO INC	154,000154,000	$4M	0.15%	NEW
64	Retirement Systems of Alabama	151,400151,400	$4M	0.14%	—
65	Holocene Advisors, LP	149,354149,354	$4M	0.14%	ADD 6%
66	PDT Partners, LLC	138,207138,207	$4M	0.13%	—
67	RENAISSANCE TECHNOLOGIES LLC	128,100128,100	$4M	0.12%	NEW
68	Balyasny Asset Management L.P.	123,555123,555	$3M	0.12%	TRIM -35%
69	Daiwa Securities Group Inc.	120,500120,500	$3M	0.11%	ADD 7%
70	BNP PARIBAS FINANCIAL MARKETS	119,989119,989	$3M	0.11%	TRIM -35%
71	Mariner, LLC	117,695117,695	$3M	0.11%	NEW
72	ALGERT GLOBAL LLC	115,088115,088	$3M	0.11%	TRIM -32%
73	CITIGROUP INC	114,021114,021	$3M	0.11%	ADD 28%
74	Oak Thistle LLC	113,057113,057	$3M	0.11%	NEW
75	CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM	112,063112,063	$3M	0.11%	ADD 22%
76	NEW YORK STATE TEACHERS RETIREMENT SYSTEM	111,212111,212	$3M	0.10%	TRIM -3%
77	Advisors Asset Management, Inc.	109,824109,824	$3M	0.10%	ADD 26%
78	Point72 Asset Management, L.P.	106,833106,833	$3M	0.10%	TRIM -57%
79	Bridgewater Associates, LP	106,600106,600	$3M	0.10%	TRIM -75%
80	ICON ADVISERS INC/CO	106,467106,467	$3M	0.10%	TRIM -3%
81	ENVESTNET ASSET MANAGEMENT INC	106,301106,301	$3M	0.10%	NEW
82	ALLIANCEBERNSTEIN L.P.	168,896168,896	$3M	0.16%	—
83	CANADA LIFE ASSURANCE Co	103,589103,589	$3M	0.10%	TRIM -2%
84	Universal- Beteiligungs- und Servicegesellschaft mbH	102,676102,676	$3M	0.10%	ADD 7%
85	Aquatic Capital Management LLC	100,576100,576	$3M	0.09%	ADD 227%
86	Paralel Advisors LLC	97,91997,919	$3M	0.09%	—
87	PRUDENTIAL FINANCIAL INC	96,25496,254	$3M	0.09%	—
88	PRICE T ROWE ASSOCIATES INC /MD/	95,79995,799	$3M	0.09%	ADD 7%
89	Quadrature Capital Ltd	89,68589,685	$2M	0.08%	NEW
90	SEI INVESTMENTS CO	88,79088,790	$2M	0.08%	ADD 123%
91	STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM	85,44185,441	$2M	0.08%	—
92	D. E. Shaw & Co., Inc.	83,33383,333	$2M	0.08%	ADD 27%
93	Creative Planning	79,77979,779	$2M	0.08%	ADD 95%
94	Thrivent Financial for Lutherans	78,87778,877	$2M	0.07%	TRIM -6%
95	STATE OF WISCONSIN INVESTMENT BOARD	77,20377,203	$2M	0.07%	TRIM -3%
96	SIH Partners, LLLP	75,69175,691	$2M	0.07%	NEW
97	Edgestream Partners, L.P.	75,08275,082	$2M	0.07%	NEW
98	Brooklyn Investment Group	71,83771,837	$2M	0.07%	NEW
99	Vanguard Investments Australia, Ltd.	71,25371,253	$2M	0.07%	NEW
100	VANGUARD ASSET MANAGEMENT, Ltd	69,45969,459	$2M	0.07%	NEW

† a filer this large appearing as NEW usually reflects a renamed or succeeded filing entity (the old name stops filing the same quarter) — not a brand-new position.

Rows rank by the value each filer reported — 13F filers price their own positions, so a holder with fewer shares can rank just above one with more.

Holder trends· top 15 holders · shares held over 6 quarters

green added · red trimmed

Holder

2024-Q4

2025-Q1

2025-Q2

2025-Q3

2025-Q4

2026-Q1

Latest value

BlackRock, Inc.

12.7M

11.5M

10.6M

11.0M

13.9M

$387M

VANGUARD PORTFOLIO MANAGEMENT LLC

—

6.1M

$169M

Silver Heights Capital Management Inc

3.7M

4.2M

5.2M

5.3M

5.1M

$143M

STATE STREET CORP

4.4M

4.5M

4.1M

4.0M

4.8M

5.1M

$140M

VANGUARD CAPITAL MANAGEMENT LLC

—

4.1M

$114M

AMERICAN CENTURY COMPANIES INC

1.7M

2.2M

2.6M

2.9M

3.1M

3.5M

$96M

Gotham Asset Management, LLC

703K

879K

951K

308K

2.3M

3.4M

$93M

AQR CAPITAL MANAGEMENT LLC

941K

410K

207K

128K

479K

2.9M

$81M

DIMENSIONAL FUND ADVISORS LP

2.1M

2.5M

2.6M

2.3M

2.1M

2.2M

$60M

GEODE CAPITAL MANAGEMENT, LLC

2.0M

1.9M

1.7M

1.9M

2.0M

$56M

Man Group plc

183K

279K

617K

2.0M

1.9M

$53M

ARK Investment Management LLC

2.5M

4.9M

5.3M

6.5M

2.9M

1.7M

$48M

MORGAN STANLEY

1.9M

2.2M

2.5M

1.8M

1.6M

$44M

VAN ECK ASSOCIATES CORP

140K

262K

332K

763K

1.2M

1.5M

$42M

CHARLES SCHWAB INVESTMENT MANAGEMENT INC

1.1M

1.0M

1.2M

1.4M

$38M

Shares reported each quarter by the largest current holders. Green = added vs the prior filing, red = trimmed, grey = roughly held; a dash is a quarter with no 13F on file (a gap is skipped, not read as an exit). 13F is filed up to 45 days after quarter-end. Up to 40 quarters (10 years) available — use the selector above.

Institutional footprint by quarter

Line breaks are honest gaps — quarters with no 13F record, or a suppressed % — never interpolated. % of shares outstanding uses today's share count for every quarter (the only count stored).

Quarter	Holders	Shares held	% shares out	Value held
2026-Q1	377	89,325,086	84.3%	$2.5B
2025-Q4

Short interest has its own tab now — open SI →

Source: SEC Form 13F — every institution manager (≥ $100M in 13F securities) reporting a long US-listed position, across ~10,250 filers over 10 years of history. 13F is long-only, US-listed, filed up to 45 days after quarter-end.

Activists & large holders· Schedule 13D/G beneficial owners · IRDM

Activists — 13D, active intent

Baralonco Ltd9.53%▼ -0.43ppSCHEDULE 13D/A · Amd 9 · event 2026-04-02SEC →

10,000,000 shares · 3 reporting persons

Large holders — 13G, passive (top 5 of 6 by % of class)

Holder	% of class	Type	As of
BlackRock, Inc.	12.5%	QII	2025-12-31	SEC →
VANGUARD PORTFOLIO MANAGEMENT LLC	5.81%	QII	2026-03-31	SEC →
Silver Heights Capital Management Inc	5%	QII	2025-12-31	SEC →

Institutional ownership· 13F filers holding IRDM · 2026-Q1 methodology → sources →

377 holders

% of shares outstanding held

84.3%

Shares held (13F)

89,325,086

Reporting holders

377

Top holders

largest 100 of 377 · Δ vs 2025-Q4

#	Holder	Shares	Value	% of shares out	Δ QoQ
1	BlackRock, Inc.	13,939,61813.9M	$387M	13.16%	—
2	VANGUARD PORTFOLIO MANAGEMENT LLC	6,091,7496.1M	$169M	5.75%	NEW†
3	Silver Heights Capital Management Inc	5,145,4795.1M	$143M	4.86%	TRIM -2%
4	STATE STREET CORP	5,050,1665.1M	$140M	4.77%	ADD 6%
5	VANGUARD CAPITAL MANAGEMENT LLC	4,111,3254.1M	$114M	3.88%	NEW†
6	AMERICAN CENTURY COMPANIES INC	3,469,9543.5M	$96M	3.27%	ADD 13%
7	Gotham Asset Management, LLC	3,353,9713.4M	$93M	3.17%	ADD 45%
8	AQR CAPITAL MANAGEMENT LLC	2,917,8272.9M	$81M	2.75%	ADD 509%
9	DIMENSIONAL FUND ADVISORS LP	2,159,0612.2M	$60M	2.04%	ADD 3%
10	GEODE CAPITAL MANAGEMENT, LLC	2,007,0112.0M	$56M	1.89%	ADD 5%
11	Man Group plc	1,907,0441.9M	$53M	1.80%	ADD 3%
12	ARK Investment Management LLC	1,726,8021.7M	$48M	1.63%	TRIM -39%
13	MORGAN STANLEY	1,583,3371.6M	$44M	1.49%	TRIM -12%
14	VAN ECK ASSOCIATES CORP	1,504,6281.5M	$42M	1.42%	ADD 25%
15	CHARLES SCHWAB INVESTMENT MANAGEMENT INC	1,366,0051.4M	$38M	1.29%	ADD 13%
16	UBS Group AG	1,284,5611.3M	$36M	1.21%	—
17	SCHRODER INVESTMENT MANAGEMENT GROUP	1,282,6391.3M	$34M	1.21%	ADD 34%
18	Bank of New York Mellon Corp	1,150,4501.2M	$32M	1.09%	—
19	ARROWSTREET CAPITAL, LIMITED PARTNERSHIP	1,101,2311.1M	$31M	1.04%	TRIM -5%
20	BARCLAYS PLC	994,069994,069	$28M	0.94%	—
21	Invesco Ltd.	987,926987,926	$27M	0.93%	—
22	Select Equity Group, L.P.	942,519942,519	$26M	0.89%	ADD 13%
23	GOLDMAN SACHS GROUP INC	928,388928,388	$26M	0.88%	TRIM -60%
24	JUPITER ASSET MANAGEMENT LTD	893,282893,282	$25M	0.84%	ADD 11%
25	NORTHERN TRUST CORP	863,494863,494	$24M	0.81%	TRIM -11%
26	Sumitomo Mitsui Trust Group, Inc.	791,773791,773	$22M	0.75%	TRIM -32%
27	Penserra Capital Management LLC	755,728755,728	$21M	0.71%	TRIM -11%
28	Amova Asset Management Americas, Inc.	736,973736,973	$20M	0.70%	TRIM -34%
29	JPMORGAN CHASE & CO	708,297708,297	$19M	0.67%	ADD 30%
30	VANGUARD FIDUCIARY TRUST CO	636,855636,855	$18M	0.60%	NEW
31	PINNACLE ASSOCIATES LTD	562,741562,741	$16M	0.53%	TRIM -7%
32	FMR LLC	540,053540,053	$15M	0.51%	ADD 17%
33	Mitsubishi UFJ Asset Management Co., Ltd.	538,427538,427	$15M	0.51%	ADD 36%
34	PANAGORA ASSET MANAGEMENT INC	529,520529,520	$15M	0.50%	NEW
35	BROWN ADVISORY INC	512,576512,576	$14M	0.48%	—
36	PRINCIPAL FINANCIAL GROUP INC	508,290508,290	$14M	0.48%	ADD 2%
37	MILLENNIUM MANAGEMENT LLC	494,662494,662	$14M	0.47%	TRIM -52%
38	Nuveen, LLC	425,145425,145	$12M	0.40%	TRIM -29%
39	TWO SIGMA INVESTMENTS, LP	402,428402,428	$11M	0.38%	TRIM -43%
40	STIFEL FINANCIAL CORP	397,887397,887	$11M	0.38%	ADD 31%
41	Legal & General Group Plc	378,692378,692	$11M	0.36%	TRIM -8%
42	Public Sector Pension Investment Board	375,511375,511	$10M	0.35%	ADD 4%
43	RAYMOND JAMES FINANCIAL INC	368,276368,276	$10M	0.35%	ADD 13%
44	UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC	359,530359,530	$10M	0.34%	—
45	Russell Investments Group, Ltd.	352,947352,947	$10M	0.33%	ADD 15%
46	FIRST TRUST ADVISORS LP	352,249352,249	$10M	0.33%	TRIM -18%
47	BANK OF AMERICA CORP /DE/	351,234351,234	$10M	0.33%	ADD 62%
48	JANUS HENDERSON GROUP PLC	306,684306,684	$9M	0.29%	ADD 10%
49	SUSQUEHANNA INTERNATIONAL GROUP, LLP	291,694291,694	$8M	0.28%	ADD 70%
50	Robertson Opportunity Capital, LLC	287,346287,346	$8M	0.27%	NEW
51	CX Institutional	272,787272,787	$8M	0.26%	NEW
52	Defiance ETFs, LLC	255,175255,175	$7M	0.24%	TRIM -55%
53	NORDEA INVESTMENT MANAGEMENT AB	255,788255,788	$7M	0.24%	TRIM -4%
54	RHUMBLINE ADVISERS	234,248234,248	$6M	0.22%	ADD 4%
55	AMERIPRISE FINANCIAL INC	233,301233,301	$6M	0.22%	ADD 18%
56	BLAIR WILLIAM & CO/IL	220,251220,251	$6M	0.21%	TRIM -6%
57	VICTORY CAPITAL MANAGEMENT INC	219,206219,206	$6M	0.21%	TRIM -32%
58	BESSEMER GROUP INC	217,485217,485	$6M	0.21%	ADD 54682%
59	ArchPoint Investors	197,066197,066	$5M	0.19%	—
60	LOS ANGELES CAPITAL MANAGEMENT LLC	192,128192,128	$5M	0.18%	ADD 57770%
61	Swiss National Bank	186,400186,400	$5M	0.18%	—
62	COMMONWEALTH OF PENNSYLVANIA PUBLIC SCHOOL EMPLS RETRMT SYS	161,046161,046	$4M	0.15%	TRIM -9%
63	MORGENS WATERFALL VINTIADIS & CO INC	154,000154,000	$4M	0.15%	NEW
64	Retirement Systems of Alabama	151,400151,400	$4M	0.14%	—
65	Holocene Advisors, LP	149,354149,354	$4M	0.14%	ADD 6%
66	PDT Partners, LLC	138,207138,207	$4M	0.13%	—
67	RENAISSANCE TECHNOLOGIES LLC	128,100128,100	$4M	0.12%	NEW
68	Balyasny Asset Management L.P.	123,555123,555	$3M	0.12%	TRIM -35%
69	Daiwa Securities Group Inc.	120,500120,500	$3M	0.11%	ADD 7%
70	BNP PARIBAS FINANCIAL MARKETS	119,989119,989	$3M	0.11%	TRIM -35%
71	Mariner, LLC	117,695117,695	$3M	0.11%	NEW
72	ALGERT GLOBAL LLC	115,088115,088	$3M	0.11%	TRIM -32%
73	CITIGROUP INC	114,021114,021	$3M	0.11%	ADD 28%
74	Oak Thistle LLC	113,057113,057	$3M	0.11%	NEW
75	CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM	112,063112,063	$3M	0.11%	ADD 22%
76	NEW YORK STATE TEACHERS RETIREMENT SYSTEM	111,212111,212	$3M	0.10%	TRIM -3%
77	Advisors Asset Management, Inc.	109,824109,824	$3M	0.10%	ADD 26%
78	Point72 Asset Management, L.P.	106,833106,833	$3M	0.10%	TRIM -57%
79	Bridgewater Associates, LP	106,600106,600	$3M	0.10%	TRIM -75%
80	ICON ADVISERS INC/CO	106,467106,467	$3M	0.10%	TRIM -3%
81	ENVESTNET ASSET MANAGEMENT INC	106,301106,301	$3M	0.10%	NEW
82	ALLIANCEBERNSTEIN L.P.	168,896168,896	$3M	0.16%	—
83	CANADA LIFE ASSURANCE Co	103,589103,589	$3M	0.10%	TRIM -2%
84	Universal- Beteiligungs- und Servicegesellschaft mbH	102,676102,676	$3M	0.10%	ADD 7%
85	Aquatic Capital Management LLC	100,576100,576	$3M	0.09%	ADD 227%
86	Paralel Advisors LLC	97,91997,919	$3M	0.09%	—
87	PRUDENTIAL FINANCIAL INC	96,25496,254	$3M	0.09%	—
88	PRICE T ROWE ASSOCIATES INC /MD/	95,79995,799	$3M	0.09%	ADD 7%
89	Quadrature Capital Ltd	89,68589,685	$2M	0.08%	NEW
90	SEI INVESTMENTS CO	88,79088,790	$2M	0.08%	ADD 123%
91	STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM	85,44185,441	$2M	0.08%	—
92	D. E. Shaw & Co., Inc.	83,33383,333	$2M	0.08%	ADD 27%
93	Creative Planning	79,77979,779	$2M	0.08%	ADD 95%
94	Thrivent Financial for Lutherans	78,87778,877	$2M	0.07%	TRIM -6%
95	STATE OF WISCONSIN INVESTMENT BOARD	77,20377,203	$2M	0.07%	TRIM -3%
96	SIH Partners, LLLP	75,69175,691	$2M	0.07%	NEW
97	Edgestream Partners, L.P.	75,08275,082	$2M	0.07%	NEW
98	Brooklyn Investment Group	71,83771,837	$2M	0.07%	NEW
99	Vanguard Investments Australia, Ltd.	71,25371,253	$2M	0.07%	NEW
100	VANGUARD ASSET MANAGEMENT, Ltd	69,45969,459	$2M	0.07%	NEW

† a filer this large appearing as NEW usually reflects a renamed or succeeded filing entity (the old name stops filing the same quarter) — not a brand-new position.

Rows rank by the value each filer reported — 13F filers price their own positions, so a holder with fewer shares can rank just above one with more.

Holder trends· top 15 holders · shares held over 6 quarters

green added · red trimmed

Holder

2024-Q4

2025-Q1

2025-Q2

2025-Q3

2025-Q4

2026-Q1

Latest value

BlackRock, Inc.

12.7M

11.5M

10.6M

11.0M

13.9M

$387M

VANGUARD PORTFOLIO MANAGEMENT LLC

—

6.1M

$169M

Silver Heights Capital Management Inc

3.7M

4.2M

5.2M

5.3M

5.1M

$143M

STATE STREET CORP

4.4M

4.5M

4.1M

4.0M

4.8M

5.1M

$140M

VANGUARD CAPITAL MANAGEMENT LLC

—

4.1M

$114M

AMERICAN CENTURY COMPANIES INC

1.7M

2.2M

2.6M

2.9M

3.1M

3.5M

$96M

Gotham Asset Management, LLC

703K

879K

951K

308K

2.3M

3.4M

$93M

AQR CAPITAL MANAGEMENT LLC

941K

410K

207K

128K

479K

2.9M

$81M

DIMENSIONAL FUND ADVISORS LP

2.1M

2.5M

2.6M

2.3M

2.1M

2.2M

$60M

GEODE CAPITAL MANAGEMENT, LLC

2.0M

1.9M

1.7M

1.9M

2.0M

$56M

Man Group plc

183K

279K

617K

2.0M

1.9M

$53M

ARK Investment Management LLC

2.5M

4.9M

5.3M

6.5M

2.9M

1.7M

$48M

MORGAN STANLEY

1.9M

2.2M

2.5M

1.8M

1.6M

$44M

VAN ECK ASSOCIATES CORP

140K

262K

332K

763K

1.2M

1.5M

$42M

CHARLES SCHWAB INVESTMENT MANAGEMENT INC

1.1M

1.0M

1.2M

1.4M

$38M

Institutional footprint by quarter

Line breaks are honest gaps — quarters with no 13F record, or a suppressed % — never interpolated. % of shares outstanding uses today's share count for every quarter (the only count stored).

Quarter	Holders	Shares held	% shares out	Value held
2026-Q1	377	89,325,086	84.3%	$2.5B
2025-Q4

Short interest has its own tab now — open SI →

Activists & large holders· Schedule 13D/G beneficial owners · IRDM

Activists — 13D, active intent

Baralonco Ltd9.53%▼ -0.43ppSCHEDULE 13D/A · Amd 9 · event 2026-04-02SEC →

10,000,000 shares · 3 reporting persons

Large holders — 13G, passive (top 5 of 6 by % of class)

Holder	% of class	Type	As of
BlackRock, Inc.	12.5%	QII	2025-12-31	SEC →
VANGUARD PORTFOLIO MANAGEMENT LLC	5.81%	QII	2026-03-31	SEC →
Silver Heights Capital Management Inc	5%	QII	2025-12-31	SEC →

IRDM US Equity☆

Institutional ownership· 13F filers holding IRDM · 2026-Q1 methodology → sources →

Top holders

Holder trends· top 15 holders · shares held over 6 quarters

Institutional footprint by quarter

Activists & large holders· Schedule 13D/G beneficial owners · IRDM

Institutional ownership· 13F filers holding IRDM · 2026-Q1 methodology → sources →

Top holders

Holder trends· top 15 holders · shares held over 6 quarters

Institutional footprint by quarter

Activists & large holders· Schedule 13D/G beneficial owners · IRDM

IRDM US Equity