O'Sullivan Michael J.
Berkshire Hathaway Class B (2020 Irrev Trust FBO Grandchildren) · See Remarks
O'Sullivan Michael J. is listed in public filings as officer: See Remarks. This O'Sullivan Michael J. insider trading page organizes Form 4 disclosures, reported purchases and sales, transaction dates, share amounts, related issuers, and historical insider activity so readers can review the person's public trading record in one place. Companies and tickers connected to this insider trading profile include Berkshire Hathaway Class B (2020 Irrev Trust FBO Grandchildren) (BRK.B), and Snap Inc (Trade was for 2020 Trust for Khanna Children) (SNAP). Investors use O'Sullivan Michael J.'s insider trading disclosures to study buying and selling patterns, position changes, company-specific activity, and the source evidence behind each reported transaction.