Mario Gabelli’s Portfolio — GAMCO INVESTORS, INC. ET AL

Mario Gabelli founded GAMCO on his 'Private Market Value with a Catalyst' method — valuing companies as an informed industrialist would and buying when an event could close the gap — becoming one of the longest-tenured active managers in America.

GAMCO's sprawling 13F covers hundreds of positions across media, industrials, and utilities, dense with merger-arb stakes and small-cap names where Gabelli's research franchise has followed management for decades.

Gamco Investors, Inc. Et Al reported $10.2B in U.S.-listed holdings across 1,007 positions for Q1 2026.

Its largest position, MSGS, represents 1.9% of the portfolio.

Compared with Q4 2025, the fund opened 52 new positions and exited 81.