Mainstream Capital Management’s Interactive Brokers IBKR Stock Holding History

Mainstream Capital Management’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 Q2	$1.91M	Buy	21,923 +109	+0.5%	+$9.07K	1.15%	26
2026 Q1	$1.46M	Buy	21,814 +262	+1%	+$18.7K	0.98%	31
2025 Q4	$1.39M	Buy	21,552 +2,171	+11%	+$145K	0.91%	32
2025 Q3	$1.33M	Buy	19,381 +1,009	+5%	+$63.5K	0.89%	37
2025 Q2	$1.02M	Buy	18,372 +1,168	+7%	+$55.4K	0.74%	41
2025 Q1	$712K	Buy	+17,204	New	+$852K	0.56%	50

Other funds holding IBKR

Ninety One (UK) London, United Kingdom $44.7B AUM 17.24% 1-Year Est. Return

ECU

Egerton Capital (UK) London, United Kingdom $10.4B AUM 25.66% 1-Year Est. Return

CAM

Congress Asset Management Boston, Massachusetts $16.3B AUM 42.69% 1-Year Est. Return

Robeco Institutional Asset Management Rotterdam, Netherlands $81.4B AUM 40.71% 1-Year Est. Return

Assenagon Asset Management Senningerberg, Luxembourg $80.2B AUM 50.57% 1-Year Est. Return

Systrade Vaduz, Liechtenstein $160M AUM 73.26% 1-Year Est. Return

CCP

Crocodile Capital Partners Ursensollen, Germany $147M AUM 67.67% 1-Year Est. Return

CNB

Czech National Bank Prague, Czech Republic $18.3B AUM 43.04% 1-Year Est. Return

Handelsbanken Fonder Stockholm, Sweden $35.1B AUM 47.76% 1-Year Est. Return

CAMG

CWA Asset Management Group Naples, Florida $3.28B AUM 34.07% 1-Year Est. Return

Mainstream Capital Management's IBKR Position: Q2 2026 in Review

Mainstream Capital Management increased its Interactive Brokers (IBKR) stake by 0.5% in Q2 2026, buying an estimated $9.07K and bringing the position to 21,923 shares worth $1.91M. The position accounts for 1.15% of the portfolio, ranked #26.

Mainstream Capital Management first reported a position in IBKR in Q1 2025 and has held it in 6 quarters since. 173 funds tracked by Wall St. Rank hold IBKR as of Q2 2026.

Mainstream Capital Management held 21,923 shares of Interactive Brokers worth $1.91M as of Q2 2026.
Mainstream Capital Management bought 109 Interactive Brokers shares in Q2 2026, an estimated $9.07K.
Interactive Brokers made up 1.15% of Mainstream Capital Management's portfolio in Q2 2026, its #26 holding.
Mainstream Capital Management first reported a position in Interactive Brokers in Q1 2025 and has held it in 6 quarters since.
173 funds tracked by Wall St. Rank held Interactive Brokers as of Q2 2026.

Based on Mainstream Capital Management's 13F filing for Q2 2026, filed 15 Jul 2026.