Summit Trail Advisors’s Iridium Communications IRDM Stock Holding History

Summit Trail Advisors’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	$773K	Buy	14,089 +2,637	+23%	+$113K	0.01%	1082
2026 Q1	$318K	Sell	11,452 -1,381	-11%	-$31.1K	﹤0.01%	1291
2025 Q4	$223K	Buy	12,833 +2,059	+19%	+$36.4K	﹤0.01%	1255
2025 Q3	$188K	Buy	+10,774	New	+$266K	﹤0.01%	1299
2018 Q3	–	Sell	-5,294	Closed	-$85K	–	364
2018 Q2	$85K	Buy	+5,294	New	+$72K	0.03%	230
2018 Q1	–	Sell	-6,748	Closed	-$83K	–	1047
2017 Q4	$83K	Buy	+6,748	New	+$78K	0.01%	679

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

Summit Trail Advisors's IRDM Position: Q2 2026 in Review

Summit Trail Advisors increased its Iridium Communications (IRDM) stake by 23% in Q2 2026, buying an estimated $113K and bringing the position to 14,089 shares worth $773K. The position accounts for 0.01% of the portfolio, ranked #1082.

Summit Trail Advisors first reported a position in IRDM in Q4 2017 and has held it in 6 quarters since. 483 funds tracked by Wall St. Rank hold IRDM as of Q2 2026.

Summit Trail Advisors held 14,089 shares of Iridium Communications worth $773K as of Q2 2026.
Summit Trail Advisors bought 2,637 Iridium Communications shares in Q2 2026, an estimated $113K.
Iridium Communications made up 0.01% of Summit Trail Advisors's portfolio in Q2 2026, its #1082 holding.
Summit Trail Advisors first reported a position in Iridium Communications in Q4 2017 and has held it in 6 quarters since.
483 funds tracked by Wall St. Rank held Iridium Communications as of Q2 2026.

Based on Summit Trail Advisors's 13F filing for Q2 2026, filed 11 Aug 2026.