Two Sigma Securities’s Iridium Communications IRDM Stock Holding History

Two Sigma Securities’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 Q2	$681K	Buy	+12,417	New	+$531K	0.06%	441
2025 Q4	–	Sell	-16,794	Closed	-$293K	–	1744
2025 Q3	$293K	Sell	16,794 -32	-0.2%	-$791	0.04%	598
2025 Q2	$508K	Buy	+16,826	New	+$438K	0.06%	420
2023 Q4	–	Sell	-8,495	Closed	-$386K	–	3298
2023 Q3	$386K	Buy	+8,495	New	+$440K	﹤0.01%	1731
2018 Q4	–	Sell	-34,011	Closed	-$765K	–	2475
2018 Q3	$765K	Buy	34,011 +7,718	+29%	+$150K	0.01%	1161
2018 Q2	$423K	Buy	+26,293	New	+$358K	﹤0.01%	1845
2017 Q1	–	Sell	-19,631	Closed	-$188K	–	1006
2016 Q4	$188K	Buy	+19,631	New	+$175K	0.06%	471

Other funds holding IRDM

BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return

AQR Capital Management Greenwich, Connecticut $287B AUM 42.33% 1-Year Est. Return

Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM

American Century Companies Kansas City, Missouri $226B AUM 44.75% 1-Year Est. Return

State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return

Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM

SHCM

Silver Heights Capital Management Toronto, Ontario, Canada $324M AUM 55.4% 1-Year Est. Return

GAM

Gotham Asset Management New York $43B AUM 34.97% 1-Year Est. Return

Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 1-Year Est. Return

VanEck Associates New York $164B AUM 112.45% 1-Year Est. Return

Two Sigma Securities's IRDM Position: Q2 2026 in Review

Two Sigma Securities opened a new position in Iridium Communications (IRDM) in Q2 2026: 12,417 shares worth $681K. The stake represents 0.06% of the portfolio and ranks #441 among its holdings. This is a return to the name: Two Sigma Securities previously reported a position in IRDM as recently as Q3 2025.

Two Sigma Securities first reported a position in IRDM in Q4 2016 and has held it in 7 quarters since. The position peaked at $765K in Q3 2018. 483 funds tracked by Wall St. Rank hold IRDM as of Q2 2026.

Two Sigma Securities held 12,417 shares of Iridium Communications worth $681K as of Q2 2026.
Iridium Communications was a new Two Sigma Securities position in Q2 2026.
Iridium Communications made up 0.06% of Two Sigma Securities's portfolio in Q2 2026, its #441 holding.
Two Sigma Securities first reported a position in Iridium Communications in Q4 2016 and has held it in 7 quarters since.
Two Sigma Securities's Iridium Communications position peaked at $765K in Q3 2018.
483 funds tracked by Wall St. Rank held Iridium Communications as of Q2 2026.

Based on Two Sigma Securities's 13F filing for Q2 2026, filed 14 Aug 2026.