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IRDM · TMUS in the 13F filings

Two to four stocks side by side among the 95 tracked managers: who lists them, how that has moved, who bought and sold in a quarter, and which managers hold more than one.

IRDMTMUS
Quarter
Q2 2026Q1 2026Q4 2025Q3 2025Q2 2025Q1 2025Q4 2024Q3 2024Q2 2024Q1 2024Q4 2023

Holders over time

Tracked managers listing each stock every quarter, at least, or their combined reported value. A gap is a quarter in which no tracked manager listed it. Click a quarter to compare there.
  • IRDM
  • TMUS
0204060202120222023202420252026
Holders and value by quarter
QuarterIRDMTMUS
Q3 20203 holders, $228m39 holders, $17.6bn
Q4 20203 holders, $450m37 holders, $19.6bn
Q1 20215 holders, $524m39 holders, $17.7bn
Q2 20213 holders, $621m32 holders, $21.2bn
Q3 20214 holders, $555m37 holders, $18.5bn
Q4 20214 holders, $511m37 holders, $15.7bn
Q1 20225 holders, $199m36 holders, $16.9bn
Q2 20226 holders, $186m42 holders, $18.3bn
Q3 20227 holders, $200m40 holders, $16.7bn
Q4 20228 holders, $216m38 holders, $15.5bn
Q1 20236 holders, $257m38 holders, $17.7bn
Q2 20237 holders, $356m39 holders, $18.1bn
Q3 20238 holders, $228m41 holders, $17.4bn
Q4 20235 holders, $169m34 holders, $17.1bn
Q1 20248 holders, $170m29 holders, $16.7bn
Q2 20242 holders, $94m30 holders, $17.8bn
Q3 20247 holders, $144m26 holders, $19.7bn
Q4 20243 holders, $81m29 holders, $18.8bn
Q1 20253 holders, $140m36 holders, $21.5bn
Q2 20252 holders, $170m35 holders, $21.1bn
Q3 20253 holders, $150m42 holders, $23.1bn
Q4 20256 holders, $108m32 holders, $26.7bn
Q1 20264 holders, $109m42 holders, $28.3bn
Q2 20268 holders, $561m36 holders, $19.4bn
IRDM

Iridium Communications Inc

Holders
3
Reported value
$140m
Buyers
3
Sellers
0

Breadth +3 among 95 comparable managers.

Communications and media
TMUS

T-mobile US Inc

Holders
36
Reported value
$21.5bn
Buyers
21
Sellers
14

Breadth +7 among 95 comparable managers.

Communications and media

Who holds both, Q1 2025

Among the 37 tracked managers listing any of them. "Only" is about listed positions: a manager may hold the other below its listed range.

Only IRDM (1)

ARK Investment Management LLC

Only TMUS (34)

Acadian Asset Management LLC, AllianceBernstein LP, AQR Capital Management LLC, Arrowstreet Capital LP, Balyasny Asset Management LLC, Berkshire Hathaway Inc, Brevan Howard Capital Management LP, Capital World Investors, Caxton Associates LLP, D. E. Shaw & Co., Davidson Kempner Capital Management LP, Dodge & Cox, Element Capital Management LLC, Fidelity (FMR LLC), Freestone Grove Partners LP, GAMCO Investors Inc, Invesco Ltd, Jane Street Group LLC, Janus Henderson Group Ltd, Man Group PLC, MFS Investment Management, Millennium Management LLC, Moore Capital Management LP, Neuberger Berman Group LLC, Renaissance Technologies LLC, and 9 more

How much of the picture this is

A 13F is a manager’s long US-listed equity book at a quarter end, filed up to 45 days later. Buyers and sellers count comparable managers (those that filed both quarters) by shares, so a rise in value with no rise in shares is the price. Large books are listed to their largest positions. These are 95 tracked managers, not the institutional market.

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