Mariner
IRDM icon

Mariner’s Iridium Communications IRDM Stock Holding History

Mariner’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 		$14.9M Buy
272,397
+154,702
+131% +$6.61M 0.02% 581
2026
Q1 		$3.26M Buy
+117,695
New +$2.65M ﹤0.01% 1243
2025
Q2 		– Sell
-7,552
Closed -$206K – 3575
2025
Q1 		$206K Sell
7,552
-3,453
-31% -$101K ﹤0.01% 2980
2024
Q4 		$319K Buy
11,005
+1,897
+21% +$56.4K ﹤0.01% 2570
2024
Q3 		$279K Sell
9,108
-1,325
-13% -$36.1K ﹤0.01% 2638
2024
Q2 		$278K Buy
10,433
+2,411
+30% +$67.9K ﹤0.01% 2514
2024
Q1 		$210K Sell
8,022
-218
-3% -$7.09K ﹤0.01% 2727
2023
Q4 		$339K Sell
8,240
-2,196
-21% -$86.9K ﹤0.01% 2237
2023
Q3 		$475K Sell
10,436
-963
-8% -$49.9K ﹤0.01% 1813
2023
Q2 		$708K Sell
11,399
-631
-5% -$39K ﹤0.01% 1514
2023
Q1 		$745K Buy
12,030
+593
+5% +$35.5K ﹤0.01% 1437
2022
Q4 		$588K Buy
11,437
+1,528
+15% +$76.7K ﹤0.01% 1552
2022
Q3 		$440K Buy
+9,909
New +$429K ﹤0.01% 1492

Other funds holding IRDM

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
AQR Capital Management
AQR Capital Management Greenwich, Connecticut $287B AUM 42.33% 1-Year Est. Return
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
American Century Companies
American Century Companies Kansas City, Missouri $226B AUM 44.75% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Vanguard Capital Management
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
Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 1-Year Est. Return
VanEck Associates
VanEck Associates New York $164B AUM 112.45% 1-Year Est. Return

Mariner's IRDM Position: Q2 2026 in Review

Mariner increased its Iridium Communications (IRDM) stake by 131% in Q2 2026, buying an estimated $6.61M and bringing the position to 272,397 shares worth $14.9M. The position accounts for 0.02% of the portfolio, ranked #581.

Mariner first reported a position in IRDM in Q3 2022 and has held it in 13 quarters since. 483 funds tracked by Wall St. Rank hold IRDM as of Q2 2026.

  • Mariner held 272,397 shares of Iridium Communications worth $14.9M as of Q2 2026.
  • Mariner bought 154,702 Iridium Communications shares in Q2 2026, an estimated $6.61M.
  • Iridium Communications made up 0.02% of Mariner's portfolio in Q2 2026, its #581 holding.
  • Mariner first reported a position in Iridium Communications in Q3 2022 and has held it in 13 quarters since.
  • 483 funds tracked by Wall St. Rank held Iridium Communications as of Q2 2026.

Based on Mariner's 13F filing for Q2 2026, filed 13 Aug 2026.