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GAMCO INVESTORS, INC. ET AL

SEC Form 13F institutional filer · CIK 0000807249

13F-HR · 298 reported holdings · 2026-03-31

SEC-registered institutional investment manager.

Reported long-US-equity value

$3.40B

Top-10 concentration

25.6%

GAMCO INVESTORS, INC. ET AL — $3.4B AUM allocation strategy

GAMCO INVESTORS, INC. ET AL files SEC Form 13F and reports $3.4B of long US equity value across 298 reported holdings for 2026-03-31.

Its largest sector bet is Industrials 17.1%, followed by Financials 8.5% and Communication Services 3.2%.

The top 10 holdings account for 26% of reported value — a broadly spread portfolio. The sector and industry splits below are of the same reported value. Track quarter-over-quarter adds, trims, new positions and exits below — sourced from SEC 13F filings, public domain.

GAMCO INVESTORS, INC. ET AL — latest SEC 13F insights

Reported long-US-equity value (13F AUM)

$3.4B

total across 298 reported holdings · 2026-03-31 · excludes shorts, cash, non-US

Top-10 concentration

26% of value

higher = narrower conviction; lower = spread / hedging

Biggest adds (shares)

$AES$HBAN$FITB

+$AES +624K sh · +$8.63M+$HBAN +220K sh · +$3.02M+$FITB +145K sh · +$6.71M

Biggest trims (shares)

$WBD$AMCR$ADBE

−$WBD −767K sh · −$24.8M−$AMCR −518K sh · −$253K−$ADBE −513K sh · −$10.8M

Added from nil (new positions)

$LRCX$WAT$MAR$EOG$CSX

5 fresh holdings — new conviction

Exited to nil (held last quarter, gone now)

$ODFL$VST$PGR$SPG$EXPE

$ODFL ($784K last qtr)$VST ($315K last qtr)$PGR ($289K last qtr)$SPG ($228K last qtr)$EXPE ($218K last qtr)

Sector allocation (share of reported value)

Industrials 17%Financials 9%Communication Services 3%Information Technology 3%Materials 3%Consumer Discretionary 3%ETFs 2%Other holdings 61%SECTORS
  • $XLIIndustrials17.1%—
  • $XLFFinancials8.5%—
  • $XLCCommunication Services3.2%—
  • $XLKInformation Technology3.1%—
  • $XLBMaterials2.9%—
  • $XLYConsumer Discretionary2.8%—
  • ETFs1.8%—
  • Other holdings60.6%—

each slice is a share of the reported long-US-equity value — smaller sectors and the rest of the book roll into “Other holdings”

Qtr shift = share-point change vs the prior quarter's filing — first period tracked for this filer; the column fills in with the next quarterly refresh.

Industry allocation (share of reported value)

Environmental & Facilities Services 5%Electrical Components & Equipment 5%Asset Management & Custody Banks 4%Consumer Finance 4%Aerospace & Defense 3%Semiconductors 2%Broadcasting 2%Interactive Media & Services 2%Other holdings 75%INDUSTRIES
  • Environmental & Facilities Services5.0%—
  • Electrical Components & Equipment4.6%—
  • Asset Management & Custody Banks3.6%—
  • Consumer Finance3.5%—
  • Aerospace & Defense3.3%—
  • Semiconductors1.7%—
  • Broadcasting1.6%—
  • Interactive Media & Services1.6%—
  • Other holdings75.1%—

the finer GICS cut of the same book — same denominator — smaller industries roll into “Other holdings”

Qtr shift = share-point change vs the prior quarter's filing — first period tracked for this filer; the column fills in with the next quarterly refresh.

Top S&P 500 holdings

9 of 9 rows · sorted by Value ↓

TickerHoldingSharesValueΔ QoQWeight
$BNYThe Bank of New York Mellon Corporation1.04M$124M-172K3.6%
$AXPAmerican Express Company407K$119M-29.9K3.5%
$AMEAMETEK Inc549K$118M-58.3K3.5%
$TXTTextron Inc1.29M$113M-88.6K3.3%
$RSGRepublic Services Inc451K$98.8M-21.3K2.9%
$ROLRollins Inc1.32M$70.6M-61.5K2.1%
$NVDANVIDIA Corporation332K$57.9M+24.9K1.7%
$WBDWarner Bros. Discovery Inc. Series A2M$55M-767K1.6%
$GOOGLAlphabet Inc188K$53.9M-1.9K1.6%

…and 289 more holdings in the full 13F filing (top positions only shown).

SEC Form 13F data sets · public domain · 45-day filing lag · >$100M AUM managers · as reported

← All 13F filers·← QuantOrb.pro

How to read Δ QoQ — the five insight categories, and the caveats

The categories. Analysts, quants and retail traders look past total portfolio value to isolate actionable signals. Five categories matter.

Conviction & concentration shifts

New positions vs complete exits — a brand-new stock signals high conviction; a full liquidation suggests a broken thesis or tax-loss harvesting. Aggressive sizing — look at share count, not dollars: a 20% share increase during a drawdown is strong dip-buying. Concentration — a narrowing top-5/10 means conviction; spreading capital across more names means hedging.

Sector & macro allocation rotations

Aggregating Δ QoQ moves across sectors shows where smart money is leaning in or sneaking out — rotating out of growth into defensives or energy, for example. The fund's total long equity exposure quarter-over-quarter is a proxy for overall institutional risk appetite.

Crowding & smart-money consensus

When several managers initiate or expand the same stock in the same quarter, that is institutional consensus. Contrarian reads: top pickers buying hard into a beaten-down name the market is selling.

Derivative & option overlays

Reported call/put changes indicate whether managers are adding downside hedges or leveraging upside exposure. Note: a long increase may be half of a market-neutral pair trade.

Who reads this

Retail "cloners"High-conviction ideas to replicate ~45 days after quarter-end.
Corporate IRWhich funds bought or dumped the stock, before the next call.
Quant / algo tradersCross-sectional factor inputs: flow, momentum, ownership.

Four caveats before you trade on it

  • 45-day lag — holdings are quarter-end; positions may already be closed.
  • Long-only — 13Fs miss shorts, pair trades and cash.
  • No non-US / fixed income — the picture is US equities plus options.
  • Corporate actions — splits and spinoffs distort raw share deltas.

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