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 13F filing (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 25.4% over the past year. OpenStocks tracks 40 consecutive 13F filings for this manager — every position change, new entry, and exit is logged below.
Portfolio
$10.41B
Positions
1036
Quarter
2025Q4
Filings tracked
40
1-Yearactual
+25.40%
since 2024Q4
3-Yearactual
+55.87%
since 2022Q4
5-Yearactual
+64.34%
since 2020Q4
10-Year
—
insufficient history
Performance overview
We mark Mario Gabelli (GAMCO)'s disclosed 13F book to current market prices and compare its growth against the S&P 500 (SPY). Mario's portfolio is 25.4% over the last 12 months · 149.3% since 2016Q1.
Portfolio growth vs SPY
Rebased to 100 at 2016Q1 · through 2025Q4
Mario Gabelli
-31.3%
SPY
—
Portfolio line tracks reported 13F AUM (mark-to-market on filing dates). It includes inflows/outflows so it isn't a pure time-weighted return — same convention as Dataroma and StockCircle.
Capital flow per quarter
BuysSellsNet
Latest · 2025Q4
-$59M
Lifetime buys
$4.71B
Lifetime sells
$7.40B
Portfolio over time
AUMPositions
QoQ AUM
+1.0%
16Q lifetime AUM
-6.0%
QoQ positions
+21
16Q lifetime positions
+122
Position concentration
858 positions