Ron Baron runs Baron Capital / BAMCO, an asset manager overseeing $36.91B in disclosed equity holdings (SEC CIK 0001017918). The latest portfolio (2025Q4) discloses 327 positions across 9 sectors, with the largest positions in TSLA, ARCH CAP GROUP LTD and MSCI. On a mark-to-market basis the tracked portfolio has returned 13.0% over the past year. OpenStocks tracks 40 consecutive quarterly snapshots for this manager — every position change, new entry, and exit is logged below.
Methodology: TWR tiles chain-link quarterly mark-to-market across consecutive filings (GIPS-compliant) · actual tiles use a real 13F snapshot marked to today · backtest tiles re-price the current book to historical prices.
We mark Ron Baron (Baron Capital / BAMCO)'s disclosed portfolio to current market prices and compare its growth against the S&P 500 (SPY). Ron’s portfolio is 13.0% over the last 12 months · 110.9% since 2016Q1.