Two Sigma Investments
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Two Sigma Investments’s Interactive Brokers IBKR Stock Holding History

Two Sigma Investments’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 		$2.66M Buy
39,700
+16,800
+73% +$1.2M ﹤0.01% 2547
2025
Q4 		$1.47M Buy
+22,900
New +$1.53M ﹤0.01% 2678

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

Two Sigma Investments's IBKR Position: Q1 2026 in Review

Two Sigma Investments increased its Interactive Brokers (IBKR) stake by 136% in Q1 2026, buying an estimated $342M and bringing the position to 8,312,971 shares worth $558M. The position accounts for 0.45% of the portfolio, ranked #30.

Two Sigma Investments first reported a position in IBKR in Q4 2013 and has held it in 18 quarters since. 994 funds tracked by Wall St. Rank hold IBKR as of Q1 2026.

  • Two Sigma Investments held 8,312,971 shares of Interactive Brokers worth $558M as of Q1 2026.
  • Two Sigma Investments bought 4,786,150 Interactive Brokers shares in Q1 2026, an estimated $342M.
  • Interactive Brokers made up 0.45% of Two Sigma Investments's portfolio in Q1 2026, its #30 holding.
  • Two Sigma Investments first reported a position in Interactive Brokers in Q4 2013 and has held it in 18 quarters since.
  • 994 funds tracked by Wall St. Rank held Interactive Brokers as of Q1 2026.

Based on Two Sigma Investments's 13F filing for Q1 2026, filed 15 May 2026.