Andersen Group Inc.
A tax, valuation, and financial advisory firm serving wealthy individuals, businesses, and investment funds through private client, business tax, and valuation services — deliberately avoiding audit work to stay independent. It was founded in 2002 by former partners of the collapsed accounting giant Arthur Andersen, first as a unit of HSBC, then bought out by its own leaders in 2007. In 2014 it bought back the rights to the "Andersen" name, reclaiming the legacy of the firm that once employed its founders.
Estimated from filings — the split-adjusted price range over the quarters each manager built the position. A range, not a fill price; 13F reports a quarter-end snapshot, not a trade date.