John Osterweis - AltaRock Partners
Period:    Q1 2026
Portfolio date:    31 Mar 2026
No. of stocks:    8
Portfolio value:    $4,126,337,614
Holdings Activity Buys Sells    History
Holding/activity history for  Interactive Brokers Group Inc. (IBKR)
Period Shares % of Portfolio Activity % Change to Portfolio Reported Price Value Filing
2016   Q3 0 0.00 Sell 100.00% 0.05 SEC
2016   Q2 7,201 0.05 Reduce 73.53% 0.15 $35.41 $255,000 SEC
2016   Q1 27,201 0.20 $39.34 $1,070,000 SEC
2015   Q4 27,201 0.24 $43.60 $1,186,000 SEC
2015   Q3 27,201 0.26 Reduce 17.82% 0.08 $39.48 $1,074,000 SEC
2015   Q2 33,101 0.44 Buy 0.44 $41.57 $1,376,000 SEC