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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  Berkshire Hathaway CL B (BRK.B)
← All BRK.B superinvestors
Period Shares % of Portfolio Activity % Change to Portfolio Price Value Filing
2016   Q3 0 0.00 Sell 100.00% 8.30 $140.95–151.05 · VW $146.19i SEC
2016   Q2 315,375 8.30 Buy 8.30 $136.65–148.03 · VW $143.07i $45,663,000 SEC
Price snapshot:
Current price$496.85
52-week low$455.19
52-week high$516.85
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Quotes delayed 15 minutes for NASDAQ, NYSE and AMEX. 13F holdings sourced from SEC EDGAR filings.
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