Twin Tree Management’s Iridium Communications IRDM Stock Holding History

Twin Tree Management’s Portfolio IRDM Stock Details IRDM Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q3	$1.82K	Sell	38 -3,944	-99%	-$190K	﹤0.01%	1310
2026 Q2	$218K	Buy	+3,982	New	+$170K	﹤0.01%	1182
2024 Q2	–	Sell	-217	Closed	-$5.68K	–	1497
2024 Q1	$5.68K	Buy	+217	New	+$7.06K	﹤0.01%	1212
2022 Q2	–	Sell	-1,349	Closed	-$54K	–	1665
2022 Q1	$54K	Sell	1,349 -27,954	-95%	-$1.05M	﹤0.01%	1522
2021 Q4	$1.21M	Sell	29,303 -15,402	-34%	-$622K	﹤0.01%	1195
2021 Q3	$1.78M	Buy	+44,705	New	+$1.88M	﹤0.01%	1056

Other funds holding IRDM

Vanguard Portfolio Management Malvern, Pennsylvania $2.21T AUM

American Century Companies Kansas City, Missouri $229B AUM 33.35% 1-Year Est. Return

State Street Boston, Massachusetts $3.44T AUM 36.12% 1-Year Est. Return

Vanguard Capital Management Malvern, Pennsylvania $4.76T AUM

Silver Heights Capital Management Toronto, Ontario, Canada $277M AUM 90.96% 1-Year Est. Return

Geode Capital Management Boston, Massachusetts $1.92T AUM 36.1% 1-Year Est. Return

Dimensional Fund Advisors Austin, Texas $551B AUM 33.95% 1-Year Est. Return

VanEck Associates New York $165B AUM 72.14% 1-Year Est. Return

Bank of New York Mellon New York $608B AUM 32.77% 1-Year Est. Return

Magnetar Financial Evanston, Illinois $10.2B AUM 0.67% 1-Year Est. Return

Twin Tree Management's IRDM Position: Q3 2026 in Review

Twin Tree Management reduced its Iridium Communications (IRDM) stake by 99% in Q3 2026, selling an estimated $190K and leaving 38 shares worth $1.82K. The position accounts for ﹤0.01% of the portfolio, ranked #1310.

Twin Tree Management first reported a position in IRDM in Q3 2021 and has held it in 6 quarters since. The position peaked at $1.78M in Q3 2021. 332 funds tracked by Wall St. Rank hold IRDM as of Q3 2026.

Twin Tree Management held 38 shares of Iridium Communications worth $1.82K as of Q3 2026.
Twin Tree Management sold 3,944 Iridium Communications shares in Q3 2026, an estimated $190K.
Iridium Communications made up ﹤0.01% of Twin Tree Management's portfolio in Q3 2026, its #1310 holding.
Twin Tree Management first reported a position in Iridium Communications in Q3 2021 and has held it in 6 quarters since.
Twin Tree Management's Iridium Communications position peaked at $1.78M in Q3 2021.
332 funds tracked by Wall St. Rank held Iridium Communications as of Q3 2026.

Based on Twin Tree Management's 13F filing for Q3 2026, filed 10 Nov 2026.