Whales walkthrough

See what super-investors own — and what they just changed

Consensus holdings, institutional buys and sells, Alpha Monitor, and full manager 13F tables — conviction vs. crowding in one place.

  • Most-owned and consensus dashboards across tracked funds
  • Institutional buys / sells and rotation signals
  • Alpha Monitor for conviction vs. margin of safety
  • Drill into each manager’s latest 13F equity book
SEC 13F Disclaimer: This data reflects long U.S. equity positions only. It excludes international holdings, private operating companies, and cash/treasuries.

Top 10 Most Owned

Names held by the most tracked funds · 13F 2026-06-30

TickerCompany# Funds
GOOG Alphabet, Inc. 23
AMZN Amazon.com, Inc. 18
META Meta Platforms, Inc. 18
TSM Taiwan Semiconductor Manufacturing Company Ltd 17
BRK-B Berkshire Hathaway, Inc. 16
MSFT Microsoft Corporation 16
V Visa, Inc. 14
AAPL Apple, Inc. 13
COF Capital One Financial Corp. 13
STT State Street SPDR S&P Health Care Equipment ETF 13

Top 10 Institutional Buys

Aggregate portfolio weight increase across all whales (quarter over quarter)

TickerCompanyWeight Δ
PLTR PALANTIR TECHNOLOGIES INC
AXP AMERICAN EXPRESS CO
GOOG ALPHABET INC
SPCX SPACE EXPLORATION TECHN CORP
RACE FERRARI N V
STT STATE STR SPDR S&P 500 ETF T
NVDA NVIDIA CORPORATION
AMZN AMAZON COM INC
MCO MOODYS CORP
MSFT MICROSOFT CORP

Top 10 Institutional Sells

Aggregate portfolio weight decrease across all whales (quarter over quarter)

TickerCompanyWeight Δ
BRK-B BERKSHIRE HATHAWAY INC DEL
GOOG ALPHABET INC
UNH UNITEDHEALTH GROUP INC
META META PLATFORMS INC
REGN REGENERON PHARMACEUTICALS
MA MASTERCARD INCORPORATED
GLD SPDR GOLD TR
LULU LULULEMON ATHLETICA INC
AMZN AMAZON COM INC
BABA ALIBABA GROUP HLDG LTD

Highest Conviction / Most Capital

Total reported 13F dollar value parked across all tracked funds

TickerCompanyTotal Value
GOOG Alphabet, Inc.
AAPL Apple, Inc.
STT State Street SPDR S&P Health Care Equipment ETF
QQQ INVESCO QQQ TRUST SERIES 1
ISHARESTR Ishares Tr
AXP American Express Co.
MU MICRON TECHNOLOGY INC
KO The Coca-Cola Co.
NVDA NVIDIA Corp.
BAC Bank of America Corp.

Alpha Monitor: Whale Conviction + Value

Top 5 whale portfolio weight increases (last two quarters) cross-referenced with Graham intrinsic value. Only names with >20% margin of safety and a completed valuation.

No alpha opportunities right now — either no qualifying whale buys, valuations are pending, or margin of safety is below 20%.

Thomas Gayner

Markel Corp · Report period 2026-06-30 · 127 positions

Portfolio Holdings ?

Total Value
Positions 127
Top 10 Concentration 47.13%
Turnover Rate 6.33%
Ticker Company Shares Value ($) Weight (%)
BRK-B BERKSHIRE HATHAWAY INC DEL 1.53M
GOOG ALPHABET INC 3.32M
DE DEERE & CO 877.9K
BROOKFIELD BROOKFIELD CORP 13.07M
AMZN AMAZON COM INC 2.03M
ADI ANALOG DEVICES INC 999.7K
GSCE GOLDMAN SACHS GROUP INC 359.4K
AAPL APPLE INC 1.23M
CAT CATERPILLAR INC 328.6K
V VISA INC 1.01M
HD HOME DEPOT INC 922.5K
WSO WATSCO INC 597.8K
TEXASINSTR TEXAS INSTRS INC 724.0K
BLK BLACKROCK INC 220.2K
MSFT MICROSOFT CORP 537.6K
DIS DISNEY WALT CO 2.03M
AXP AMERICAN EXPRESS CO 490.4K
LOWESCOSIN LOWES COS INC 752.0K
PGR PROGRESSIVE CORP 753.8K
FNV FRANCO NEV CORP 773.5K
LPLA LPL FINL HLDGS INC 560.0K
JNJ JOHNSON & JOHNSON 610.8K
BX BLACKSTONE INC 1.23M
RLI RLI CORP 2.39M
GD GENERAL DYNAMICS CORP 391.0K
NVO NOVO-NORDISK A S 2.87M
KKR KKR & CO INC 1.45M
META META PLATFORMS INC 234.2K
SCHW-PD SCHWAB CHARLES CORP 1.39M
MRSH MARSH & MCLENNAN COS INC 763.5K
APOLLOGLOB APOLLO GLOBAL MGMT INC 1.01M
ADM ARCHER DANIELS MIDLAND CO 1.51M
LIN LINDE PLC 215.6K
DEO DIAGEO PLC 1.37M
MA MASTERCARD INCORPORATED 207.5K
DG DOLLAR GEN CORP 869.2K
BAM BROOKFIELD ASSET MANAGMT LTD 2.19M
HEICOCORPN HEICO CORP NEW 379.6K
MCO MOODYS CORP 213.9K
ODFL OLD DOMINION FREIGHT LINE IN 429.1K
NSC NORFOLK SOUTHN CORP 282.5K
ILLINOISTO ILLINOIS TOOL WKS INC 327.5K
JPM JPMORGAN CHASE & CO 252.6K
NVR NVR INC 12.1K
MSCI MSCI INC 142.8K
ROK ROCKWELL AUTOMATION INC 154.9K
ECL ECOLAB INC 274.3K
SUNB SUNBELT RENTALS HOLDINGS INC 974.4K
SBUX STARBUCKS CORP 623.8K
ROL ROLLINS INC 1.52M
THG HANOVER INS GROUP INC 281.0K
ITIC INVESTORS TITLE CO NC 213.3K
CG CARLYLE GROUP INC 1.33M
TSN TYSON FOODS INC 913.5K
SPGI S&P GLOBAL INC 117.7K
AON AON PLC 135.8K
UNP UNION PAC CORP 161.0K
FERG FERGUSON ENTERPRISES INC 180.2K
RTX RTX CORPORATION 224.0K
CSCO CISCO SYS INC 355.5K
MELI MERCADOLIBRE INC 24.0K
YUM YUM BRANDS INC 245.2K
MARRIOTTIN MARRIOTT INTL INC NEW 99.5K
ALL ALLSTATE CORP 154.6K
TMO THERMO FISHER SCIENTIFIC INC 73.1K
COSTCOWHOL COSTCO WHOLESALE CORPORATION 39.1K
HGTY HAGERTY INC 3.11M
BF-A BROWN FORMAN CORP 1.32M
TROW PRICE T ROWE GROUP INC 314.0K
URI UNITED RENTALS INC 31.1K
ABNB AIRBNB INC 242.4K
LMT LOCKHEED MARTIN CORP 65.2K
HCA HCA HEALTHCARE INC 84.4K
SHW SHERWIN WILLIAMS CO 94.2K
FDS FACTSET RESH SYS INC 135.4K
LAMR LAMAR ADVERTISING CO 193.0K
VRSK VERISK ANALYTICS INC 155.9K
CSX CSX CORP 584.5K
APPLIEDMAT APPLIED MATLS INC 36.4K
APD AIR PRODUCTS AND CHEMICALS I 88.5K
FIX COMFORT SYS USA INC 13.0K
CROWNHLDGS CROWN HLDGS INC 220.0K
RENAISSANC RENAISSANCERE HLDGS LTD 70.0K
ENTERPRISE ENTERPRISE PRODS PARTNERS L 569.0K
PM PHILIP MORRIS INTL INC 114.5K
ACCENTUREP ACCENTURE PLC IRELAND 159.4K
CMCSA COMCAST CORP NEW 802.1K
HEXCELCORP HEXCEL CORP NEW 189.0K
NKE NIKE INC 447.4K
COF CAPITAL ONE FINL CORP 91.0K
BK BANK NEW YORK MELLON CORP 124.5K
CARR CARRIER GLOBAL CORPORATION 235.0K
WFC WELLS FARGO & CO 204.4K
SEIINVTSCO SEI INVTS CO 173.2K
PAYX PAYCHEX INC 150.0K
HSY HERSHEY CO 75.0K
PEP PEPSICO INC 96.2K
SPOT SPOTIFY TECHNOLOGY S A 25.9K
SHOP SHOPIFY INC 102.8K
EFX EQUIFAX INC 72.8K
CME CME GROUP INC 49.8K
CBOEGLOBAL CBOE GLOBAL MKTS INC 43.7K
UBER UBER TECHNOLOGIES INC 142.5K
OTIS OTIS WORLDWIDE CORP 133.6K
IQVIAHLDGS IQVIA HLDGS INC 46.9K
HII HUNTINGTON INGALLS INDS INC 27.5K
XOM EXXON MOBIL CORP 56.1K
NSP INSPERITY INC 181.3K
KMX CARMAX INC 136.5K
SONY SONY GROUP CORP 335.0K
CANADIANNA CANADIAN NATL RY CO 53.5K
CP CANADIAN PACIFIC KANSAS CITY 73.0K
GRAHAMHLDG GRAHAM HLDGS CO 5.2K
EMN EASTMAN CHEM CO 75.0K
ZTS ZOETIS INC 66.2K
BC BRUNSWICK CORP 51.2K
WRB BERKLEY W R CORP 60.8K
MGM MGM RESORTS INTERNATIONAL 87.5K
ACUITYINC ACUITY INC 9.8K
ICE INTERCONTINENTAL EXCHANGE IN 28.9K
EAGLEMATLS EAGLE MATLS INC 14.8K
WY WEYERHAEUSER CO 120.0K
NFLX NETFLIX INC. 40.0K
SYY SYSCO CORP 30.5K
DPZ DOMINOS PIZZA INC 5.5K
BRO BROWN & BROWN INC 14.0K
UFPI UFP INDUSTRIES INC 4.0K

New Positions

Tickers added vs 2026-03-31

Ticker Company Value ($)
COSTCOWHOL COSTCO WHOLESALE CORPORATION
ZTS ZOETIS INC
NFLX NETFLIX INC.
UFPI UFP INDUSTRIES INC

Exited Positions

Last known value from 2026-03-31

Ticker Company Last Value ($)
COSTCOWHSL COSTCO WHSL CORP NEW
SMG SCOTTS MIRACLE-GRO CO
UNH UNITEDHEALTH GROUP INC

Top Buys

Weight change vs 2026-03-31

Ticker Company Current Previous Change
GOOG ALPHABET INC
CAT CATERPILLAR INC
TEXASINSTR TEXAS INSTRS INC
ADI ANALOG DEVICES INC
COSTCOWHOL COSTCO WHOLESALE CORPORATION
MELI MERCADOLIBRE INC
GSCE GOLDMAN SACHS GROUP INC
NVO NOVO-NORDISK A S
AMZN AMAZON COM INC
ROK ROCKWELL AUTOMATION INC

Top Sells

Weight change vs 2026-03-31

Ticker Company Current Previous Change
BRK-B BERKSHIRE HATHAWAY INC DEL
COSTCOWHSL COSTCO WHSL CORP NEW
FNV FRANCO NEV CORP
LPLA LPL FINL HLDGS INC
LOWESCOSIN LOWES COS INC
BROOKFIELD BROOKFIELD CORP
META META PLATFORMS INC
ROL ROLLINS INC
BLK BLACKROCK INC
DIS DISNEY WALT CO