Michael J. O'Sullivan insider trades

Open-market stock purchases and sales by Michael J. O'Sullivan, See Remarks at Berkshire Hathaway Inc, from SEC Form 4 filings since Sep 8, 2017.

Track record: 100% of 4 scored buys are up 5% or more since purchase, averaging +9%.

Recent trades

DateStockTradeValue
Aug 12, 2026BRK.B Berkshire Hathaway IncBought$23K
Aug 12, 2026BRK.B Berkshire Hathaway IncBought$205K
Aug 12, 2026BRK.B Berkshire Hathaway IncBought$22.1K
May 6, 2026BRK.B Berkshire Hathaway IncBought$226K
May 6, 2026BRK.B Berkshire Hathaway IncBought$24.9K
Nov 17, 2025SNAP Snap IncSold$591K
Nov 17, 2025SNAP Snap IncBought (not open market)—
Oct 31, 2025SNAP Snap IncSold$186K

Companies traded

  • BRK.B Berkshire Hathaway Inc: 5 buys, last Aug 12, 2026
  • SNAP Snap Inc: 136 sales, last Nov 17, 2025

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