Stocks/Funds/CIK 1017918

BAMCO INC /NY/

long-term holder
Quarterly 13F filings · Latest period 2026-03-31 · CIK 1017918
Assets
$33.05B
-2.9% YoY
Holdings
324
Lifetime alpha vs market
-9.13% annual
Average hold time
5.3 yr
median 5.0 yr

Quarterly history

Cum return +4% vs S&P +52% · α -48% lifetimeAUM $33.1B · peak $47.1BFlow $503M (+1%)2016-062017-122019-062020-122022-062023-122025-062026-03
AUM ($B)fundS&P 500(gap = α)/ Flow in/out

Behavior signals (lifetime)

Dip response
-3.52%
trims when stocks drop
when a holding falls −10%+
Middle response
-1.99%
baseline attrition
Rally response
-2.02%
trims into rallies
when a holding rises +10%+

Top positions · 30

Ticker$ value% portYoYHold time
TSLATesla, Inc.$4.44B13.4%+43.4%10.5 yr
ACGLArch Capital Group Ltd.$1.60B4.9%-0.2%10.5 yr
MSCIMSCI Inc.$1.45B4.4%-3.4%10.5 yr
GWREGuidewire Software, Inc.$987M3.0%-20.2%10.5 yr
ITGartner, Inc.$937M2.8%-62.3%10.5 yr
IDXXIDEXX Laboratories, Inc.$918M2.8%+33.8%10.5 yr
HHyatt Hotels Corporation$912M2.8%+17.9%10.5 yr
FIGSFIGS, Inc.$886M2.7%+221.8%5.0 yr
FDSFactSet Research Systems$815M2.5%-51.6%10.5 yr
CHHChoice Hotels Internatio$796M2.4%-21.5%10.5 yr
RRRRed Rock Resorts, Inc.$716M2.2%+29.9%10.0 yr
SCHWThe Charles Schwab Corpo$701M2.1%+21.5%10.5 yr
KNSLKinsale Capital Group, I$693M2.1%-29.7%9.5 yr
CSGPCoStar Group, Inc.$658M2.0%-49.1%10.5 yr
MTNVail Resorts, Inc.$647M2.0%-16.1%10.5 yr

Portfolio composition (YoY)

Industry mix
Auto - Manufacturers13.4%+2.5pp$4.44B
Financial - Data & Stock Exchanges7.4%-0.3pp$2.45B
Software - Application7.2%-2.4pp$2.37B
Gambling, Resorts & Casinos5.6%+0.8pp$1.86B
Travel Lodging5.4%+1.3pp$1.79B
Insurance - Diversified4.9%-0.8pp$1.60B
Medical - Diagnostics & Research4.2%-0.4pp$1.39B
Semiconductors3.5%+1.6pp$1.17B
Financial - Capital Markets3.2%+0.5pp$1.06B
Consulting Services3.2%-1.9pp$1.05B
Country
US83.6%-1.1pp
BM4.9%-0.8pp
CA2.2%+1.0pp
LU2.0%+0.5pp
Unknown1.8%+0.6pp
CN1.1%-0.7pp
CH1.0%+0.5pp
TW0.7%+0.3pp
Top 5: 28.5% · Top 10: 41.6% · Top 25: 63.9%

Winners

TickerPrev $PnLYoY %
TSLA$3.68B+1.60B43.4%
FIGS$269M+0.60B221.8%
VRT$214M+0.53B247.5%
IDXX$865M+0.29B33.8%
NVDA$311M+0.19B60.9%

Losers

TickerPrev $PnLYoY %
IT$1.58B-0.99B-62.3%
CSGP$1.51B-0.74B-49.1%
FDS$1.02B-0.52B-51.6%
KNSL$846M-0.25B-29.7%
GWRE$1.06B-0.21B-20.2%

Top buys this quarter · 15

SHOP Shopify Inc.+$288M
IT Gartner, Inc.+$937M
VRSK Verisk Analytics, Inc.+$229M
GWRE Guidewire Software, Inc.+$987M
FDS FactSet Research Systems Inc.+$815M
SPOT Spotify Technology S.A.+$156M
ONON On Holding AG+$147M
FPS Forgent Power Solutions, Inc.new+$137M
EQIX Equinix, Inc.+$97M
KNSL Kinsale Capital Group, Inc.+$693M

Top sells this quarter · 15

CWAN Clearwater Analytics Holdings,$181M
CSGP CoStar Group, Inc.$128M
ACGL Arch Capital Group Ltd.$123M
MSFT Microsoft Corporation$99M
EXAS Exact Sciences Corporationexit$99M
JLL Jones Lang LaSalle Incorporate$98M
IDXX IDEXX Laboratories, Inc.$93M
VRT Vertiv Holdings Co$250M
MORN Morningstar, Inc.$81M
PRI Primerica, Inc.$68M

Quarterly history (TTM returns)

PeriodAUM# PosReturn (1yr)SPY (1yr)Alpha (1yr)Flow
2026-03-31$33.05B324+0.81%+17.59%-16.78%+0.50B
2025-12-31$36.85B325+2.51%+17.72%-15.21%-0.53B
2025-09-30$37.64B328+8.60%+17.52%-8.91%-0.87B
2025-06-30$36.88B305+16.48%+14.94%+1.54%-0.59B
2025-03-31$34.04B313+1.38%+8.30%-6.92%-0.70B
2024-12-31$38.67B314+16.11%+24.89%-8.78%-0.96B
2024-09-30$37.68B326+21.41%+36.04%-14.63%-1.40B
2024-06-30$34.90B328+3.91%+24.49%-20.58%-1.03B
2024-03-31$37.50B331+17.15%+29.62%-12.47%-1.12B
2023-12-31$37.53B329+27.78%+26.18%+1.60%-0.32B
2023-09-30$34.42B334+14.32%+21.57%-7.25%-0.19B
2023-06-30$36.11B343+18.76%+19.42%-0.67%+0.15B
2023-03-31$33.30B355-13.34%-7.82%-5.52%-0.08B
2022-12-31$29.74B370-1.58%+7.56%-9.14%-0.67B
2022-09-30$30.90B363-0.44%-4.93%+4.48%-0.08B
2022-06-30$31.12B365-21.18%-16.11%-5.07%-0.95B