Asset Manager · CIK 0000807249
Mario Gabelli
GAMCO
Mario Gabelli runs GAMCO, an asset manager overseeing $10.41B in disclosed equity holdings (SEC CIK 0000807249). The latest portfolio (2025Q4) discloses 1036 positions across 11 sectors, with the largest positions in MLI, GATX and CR. On a mark-to-market basis the tracked portfolio has returned 21.8% over the past year. OpenStocks tracks 40 consecutive quarterly snapshots for this manager — every position change, new entry, and exit is logged below.
Portfolio
$10.41B
Positions
1036
Quarter
2025Q4
Filings tracked
40
Biggest winner since filing
MLIMUELLER INDS INC
+211.4%
+$292.4M
Biggest loser since filing
ENRENERGIZER HLDGS INC NEW
-41.0%
−$17.8M
Investment strategy
Mario Gabelli is a large fund with a diversified portfolio tilted toward industrials names. 37% of the disclosed equity book is in Industrials.
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<iframe src="https://openstocks.me/embed/stock/HRI" width="100%" height="480" frameborder="0" loading="lazy" title="HRI chart by OpenStocks" style="border:0;border-radius:12px;background:transparent"></iframe>Holdings
11 sectors858 positions
Top 3 = 7% of book · HRI, MLI, GATX
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Performance
vs SPY40 quarters tracked
Mark-to-market portfolio growth vs SPY benchmark, with AUM and concentration history.
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Options & derivatives
No options
Mario Gabelli has no PUT or CALL positions disclosed for this quarter.
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Activity & trades
Quarter-by-quarterLast move 2025Q4
TRIM RMBI — and 4 more recent moves.
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Recent transactions
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NEW
WABASH NATL CORP
+20,000
~$8.65 · 2025Q4
2026-02-05