Mariner
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Mariner’s Interactive Brokers IBKR Stock Holding History

Mariner’s Portfolio IBKR Stock Details IBKR Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		$3.49M Buy
52,017
+48,373
+1,327% +$3.45M ﹤0.01% 1212
2025
Q4 		$236K Sell
3,644
-23,230
-86% -$1.56M ﹤0.01% 3047
2025
Q3 		$1.85M Sell
26,874
-7,503
-22% -$472K ﹤0.01% 1489
2025
Q2 		$1.9M Sell
34,377
-1,647
-5% -$78.1K ﹤0.01% 1367
2025
Q1 		$1.49M Buy
36,024
+10,320
+40% +$511K ﹤0.01% 1399
2024
Q4 		$1.14M Buy
25,704
+1,672
+7% +$70.4K ﹤0.01% 1561
2024
Q3 		$837K Buy
24,032
+2,104
+10% +$65.2K ﹤0.01% 1744
2024
Q2 		$672K Buy
21,928
+2,532
+13% +$75.5K ﹤0.01% 1810
2024
Q1 		$542K Buy
19,396
+72
+0.4% +$1.79K ﹤0.01% 1963
2023
Q4 		$400K Buy
19,324
+344
+2% +$7.04K ﹤0.01% 2109
2023
Q3 		$411K Sell
18,980
-980
-5% -$21.8K ﹤0.01% 1902
2023
Q2 		$415K Sell
19,960
-936
-4% -$18.5K ﹤0.01% 1878
2023
Q1 		$431K Buy
20,896
+2,912
+16% +$59.3K ﹤0.01% 1783
2022
Q4 		$325K Buy
17,984
+3,248
+22% +$60.7K ﹤0.01% 1961
2022
Q3 		$235K Buy
+14,736
New +$227K ﹤0.01% 1946
2020
Q2 		– Sell
-64,496
Closed -$696K – 739
2020
Q1 		$696K Buy
64,496
+60
+0.1% +$725 0.01% 536
2019
Q4 		$751K Buy
+64,436
New +$756K 0.01% 553

Other funds holding IBKR

BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
VPM
Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM
Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return
CCM
Cantillon Capital Management New York $15.1B AUM 23.54% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return
Kayne Anderson Rudnick Investment Management
Kayne Anderson Rudnick Investment Management Los Angeles, California $34B AUM 6.31% 1-Year Est. Return
GWM
Greenwich Wealth Management Greenwich, Connecticut $2.45B AUM 39.53% 1-Year Est. Return
Wellington Management Group
Wellington Management Group Boston, Massachusetts $535B AUM 26.23% 1-Year Est. Return

Mariner's IBKR Position: Q1 2026 in Review

Mariner increased its Interactive Brokers (IBKR) stake by 1,327% in Q1 2026, buying an estimated $3.45M and bringing the position to 52,017 shares worth $3.49M. The position accounts for ﹤0.01% of the portfolio, ranked #1212.

Mariner first reported a position in IBKR in Q4 2019 and has held it in 17 quarters since. 993 funds tracked by Wall St. Rank hold IBKR as of Q1 2026.

  • Mariner held 52,017 shares of Interactive Brokers worth $3.49M as of Q1 2026.
  • Mariner bought 48,373 Interactive Brokers shares in Q1 2026, an estimated $3.45M.
  • Interactive Brokers made up ﹤0.01% of Mariner's portfolio in Q1 2026, its #1212 holding.
  • Mariner first reported a position in Interactive Brokers in Q4 2019 and has held it in 17 quarters since.
  • 993 funds tracked by Wall St. Rank held Interactive Brokers as of Q1 2026.

Based on Mariner's 13F filing for Q1 2026, filed 13 May 2026.