Stocks/Funds/CIK 10742

BECK MACK & OLIVER LLC

long-term holder
Quarterly 13F filings · Latest period 2026-03-31 · CIK 10742
Assets
$4.85B
-3.1% YoY
Holdings
193
Lifetime alpha vs market
-1.55% annual
Average hold time
6.5 yr
median 7.5 yr

Quarterly history

Cum return +217% vs S&P +272% · α -55% lifetimeAUM $4.8B · peak $5.5BFlow $-20M (-0%)2016-062017-122019-062020-122022-062023-122025-062026-03
AUM ($B)fundS&P 500(gap = α)/ Flow in/out

Behavior signals (lifetime)

Dip response
-1.21%
trims when stocks drop
when a holding falls −10%+
Middle response
-0.58%
baseline attrition
Rally response
-2.19%
trims into rallies
when a holding rises +10%+

Top positions · 30

Ticker$ value% portYoYHold time
APOApollo Global Management$308M6.4%-17.4%4.5 yr
$264M5.4%10.5 yr
BXBlackstone Inc.$260M5.4%-14.9%7.0 yr
AJGArthur J. Gallagher & Co$230M4.7%-36.6%10.5 yr
SUNBSunbelt Rentals Holdings$220M4.5%0.3 yr
MSFTMicrosoft Corporation$206M4.2%-0.6%10.5 yr
FERGFerguson plc$194M4.0%+47.8%2.0 yr
SCHWThe Charles Schwab Corpo$192M4.0%+21.5%9.5 yr
SGISomnigroup International$178M3.7%+24.4%1.3 yr
RDNTRadNet, Inc.$177M3.6%+12.4%10.5 yr
LHLabcorp Holdings Inc.$165M3.4%+15.9%2.0 yr
ZWSZurn Elkay Water Solutio$157M3.2%+37.2%4.3 yr
CACCCredit Acceptance Corpor$131M2.7%-18.0%10.5 yr
WATWaters Corporation$129M2.7%-19.2%10.5 yr
AXPAmerican Express Company$123M2.5%+13.3%10.5 yr

Portfolio composition (YoY)

Industry mix
Asset Management14.0%-4.1pp$679M
Unknown12.8%+2.0pp$621M
Financial - Credit Services10.9%+3.4pp$527M
Medical - Diagnostics & Research9.7%+1.7pp$473M
Financial - Capital Markets5.0%+0.2pp$244M
Insurance - Brokers4.9%-0.5pp$240M
Software - Infrastructure4.3%-1.0pp$206M
Industrial - Distribution4.0%+1.3pp$196M
Household & Personal Products3.9%+1.0pp$191M
Industrial - Pollution & Treatment Controls3.2%+0.9pp$157M
Country
US81.0%+0.1pp
Unknown12.8%+2.0pp
GB4.1%-2.3pp
CA1.0%+0.2pp
IL0.7%+0.3pp
CH0.4%+0.3pp
BM0.1%-0.6pp
TW0.0%+0.0pp
Top 5: 26.4% · Top 10: 46.0% · Top 25: 78.2%

Winners

TickerPrev $PnLYoY %
FERG$138M+0.06B47.8%
GSAT$25M+0.05B218.4%
ZWS$118M+0.04B37.2%
SCHW$170M+0.04B21.5%
SGI$130M+0.03B24.4%

Losers

TickerPrev $PnLYoY %
AJG$270M-0.10B-36.6%
APO$393M-0.07B-17.4%
OWL$136M-0.07B-51.8%
ROP$132M-0.05B-39.7%
BX$316M-0.05B-14.9%

Top buys this quarter · 15

SUNB Sunbelt Rentals Holdings Incnew+$220M
AJG Arthur J. Gallagher & Co.+$40M
ALC Alcon Inc.+$14M
BX Blackstone Inc.+$260M
WAT Waters Corporation+$129M
SGI Somnigroup International Inc+$178M
ABT Abbott Laboratories+$96M
ARES Ares Management Corporation+$4M
AMZN Amazon.com, Inc.+$48M
KNSL Kinsale Capital Group, Inc.new+$3M

Top sells this quarter · 15

ROP Roper Technologies, Inc.$24M
OWL Blue Owl Capital Inc.$23M
WBD Warner Bros. Discovery, Inc.$18M
PKE Park Aerospace Corp.$7M
MTDR Matador Resources Company$61M
MSFT Microsoft Corporation$4M
LOW Lowe's Companies, Inc.$4M
ZWS Zurn Elkay Water Solutions Cor$4M
MKL Markel Corporation$4M
RDNT RadNet, Inc.$4M

Quarterly history (TTM returns)

PeriodAUM# PosReturn (1yr)SPY (1yr)Alpha (1yr)Flow
2026-03-31$4.85B193+1.76%+17.59%-15.83%-0.02B
2025-12-31$5.51B192+3.45%+17.72%-14.27%-0.04B
2025-09-30$5.50B184+9.70%+17.52%-7.82%-0.05B
2025-06-30$5.24B186+10.41%+14.94%-4.53%-0.16B
2025-03-31$5.01B184+1.58%+8.30%-6.72%+0.15B
2024-12-31$5.40B188+26.27%+24.89%+1.39%-0.09B
2024-09-30$5.14B175+33.45%+36.04%-2.58%-0.01B
2024-06-30$4.83B176+26.31%+24.49%+1.81%-0.06B
2024-03-31$4.93B176+40.91%+29.62%+11.29%+0.13B
2023-12-31$4.30B181+28.34%+26.18%+2.16%-0.02B
2023-09-30$3.82B168+24.33%+21.57%+2.77%-0.04B
2023-06-30$3.83B173+16.40%+19.42%-3.02%-0.00B
2023-03-31$3.46B168-10.99%-7.82%-3.18%+0.00B
2022-12-31$3.40B172-16.59%-18.17%+1.59%+0.01B
2022-09-30$3.10B168-15.35%-15.51%+0.15%-0.05B
2022-06-30$3.33B172-9.91%-10.62%+0.71%-0.04B