Citadel Investment Advisory, Inc.

In its 13F for Q1 2026 (holdings as of March 31, 2026, filed April 16, 2026), Citadel Investment Advisory, Inc. reported 77 stock positions worth $209.2 million. Its top holding was Berkshire Hathaway Class B (BRK.B) at 24.0% of the portfolio, followed by Markel (MKL, 13.9%) and Alphabet Class A (GOOGL, 6.4%). Compared with Q4 2025, it sold out of 1 and reduced 53. The biggest sale was Imperial Metals (IPMLF, shares −1%).

Most Recent 13F
Q2 2026
Location
CHESTERLAND, OH
CIK
0001811907
Portfolio Value
$209.2M (Q1 2026)
SEC Filing
0001811907-26-000002 ↗ filed Apr 16, 2026

Holdings Value

0$50.0M$100.0M$150.0M$200.0M$250.0M Q1 2024: $177.1M Q1 2024 Q2 2024: $175.5M Q2 2024 Q3 2024: $189.8M Q3 2024 Q4 2024: $192.6M Q4 2024 Q1 2025: $203.4M Q1 2025 Q2 2025: $206.1M Q2 2025 Q3 2025: $217.7M Q3 2025 Q4 2025: $231.2M Q4 2025 Q1 2026: $209.2M $209.2M Q1 2026 Q2 2026: $220.0M Q2 2026

Holdings 77 stocks · $209.2M

BRK.B Berkshire Hathaway Inc. Class B 24.03% 104,930 $50.3M Reduce -0.8%
MKL Markel Group Inc. 13.94% 15,242 $29.2M Reduce -2.4%
GOOGL Alphabet Inc. Class A 6.44% 46,844 $13.5M Reduce -1.4%
IPMLF Imperial Metals Corp. 4.61% 1,734,313 $9.6M Reduce -0.8%
GOOG Alphabet Inc. Class C 3.80% 27,730 $8.0M Reduce -0.4%
PM Philip Morris International 3.08% 39,030 $6.5M Reduce -1.4%
JNJ Johnson & Johnson 2.69% 23,053 $5.6M Reduce -0.8%
MSFT Microsoft Corp. 2.58% 14,568 $5.4M Reduce -2.3%
RTX RTX Corp. 2.58% 27,943 $5.4M Reduce -2.2%
IBM Intl Business Machines Corp. filed as INTERNATIONAL BUSINESS MACHS 1.95% 16,875 $4.1M Reduce -1.8%
ABBV Abbvie Inc. 1.86% 17,858 $3.9M Reduce -2.4%
GS Goldman Sachs Group Inc. 1.66% 4,115 $3.5M Reduce -3.5%
ORCL Oracle Corp. 1.57% 22,366 $3.3M Reduce -3.4%
MCO Moody's Corp. 1.55% 7,427 $3.2M Reduce -3.6%
MCD McDonald's Corp. 1.53% 10,273 $3.2M Reduce -2.3%
KO The Coca-Cola Co. 1.40% 38,503 $2.9M Reduce -2.8%
GD General Dynamics Corp. 1.36% 8,295 $2.8M Reduce -1.4%
JPM JPMorgan Chase & Co. 1.18% 8,422 $2.5M Reduce -2.1%
PEP Pepsico Inc. 1.15% 15,552 $2.4M Reduce -1.4%
BKNG Booking Holdings Inc. 1.15% 573 $2.4M No change
DIS The Walt Disney Co. filed as DISNEY WALT CO 1.03% 22,416 $2.2M Reduce -1.0%
MTD Mettler-Toledo International 1.02% 1,700 $2.1M No change
IDXX Idexx Laboratories Inc. 0.94% 3,491 $2.0M Reduce -5.2%
WRB WR Berkley Corp. filed as BERKLEY W R CORP 0.93% 29,468 $2.0M Reduce -0.8%
Medtronic 0.86% 20,700 $1.8M Reduce -2.9%
AMG Affiliated Managers Group 0.85% 6,452 $1.8M No change
AXP American Express Co. 0.84% 5,832 $1.8M Reduce -3.3%
WFC Wells Fargo & Co. 0.75% 19,775 $1.6M Reduce -1.8%
CSX CSX Corp. 0.74% 37,660 $1.5M Reduce -3.1%
WBD Warner Bros Discovery Inc. 0.66% 50,363 $1.4M Reduce -4.2%
JEF Jefferies Financial Group Inc. 0.55% 18,480 $1.1M No change
BUD Anheuser-Busch Inbev-SPN ADR 0.54% 16,383 $1.1M Reduce -3.4%
ETN Eaton Corp. PLC 0.54% 3,144 $1.1M Reduce -3.1%
CACC Credit Acceptance Corp. 0.51% 2,525 $1.1M Reduce -4.7%
BAC Bank of America Corp. filed as BANK AMERICA CORP 0.48% 20,735 $1.0M Reduce -4.6%
MHK Mohawk Industries Inc. 0.46% 9,852 $970K Reduce -7.6%
AMZN Amazon.com Inc. 0.46% 4,612 $961K Reduce -2.5%
LOW Lowe's Cos Inc. 0.45% 4,026 $951K Reduce -7.1%
ABT Abbott Laboratories 0.43% 8,730 $896K Reduce -2.6%
DHR Danaher Corp. 0.39% 4,348 $824K No change
John Marshall Bank 0.36% 37,200 $754K Reduce -2.6%
HHC The Howard Hughes Corp. 0.35% 11,692 $740K No change
CNI Canadian Natl Railway Co. 0.35% 7,161 $736K Reduce -7.1%
BA The Boeing Co. 0.33% 3,495 $696K No change
SYY Sysco Corp. 0.32% 9,401 $671K Reduce -4.0%
EG Everest Group Ltd. 0.31% 1,960 $641K Reduce -7.8%
LDOS Leidos Holdings Inc. 0.31% 4,110 $639K Reduce -1.6%
VISTAPRINT N V 0.30% 8,575 $626K No change
WYNN WYNN Resorts Ltd. 0.28% 5,811 $590K Reduce -2.5%
MA Mastercard Inc. Class A 0.28% 1,155 $577K No change
PG The Procter & Gamble Co. 0.23% 3,358 $485K Reduce -8.6%
CMCSA Comcast Corp. Class A 0.22% 16,030 $460K Reduce -1.2%
META Meta Platforms Inc. Class A 0.22% 790 $452K No change
T AT&T Inc. 0.20% 14,077 $408K No change
AAPL Apple Inc. 0.18% 1,500 $381K No change
UPS United Parcel Service Class A 0.18% 3,753 $369K Reduce -3.2%
MSCI MSCI Inc. 0.15% 585 $315K No change
LECO Lincoln Electric Holdings 0.15% 1,261 $314K Reduce -11.3%
SEIC Sei Investments Company 0.15% 3,890 $305K Reduce -1.3%
ESAB Esab Corp. 0.14% 3,137 $303K Reduce -4.5%
FCN Fti Consulting Inc. 0.14% 1,670 $295K No change
CI The Cigna Group 0.14% 1,081 $288K Reduce -0.3%
MDLZ Mondelez International Inc. Class A 0.12% 4,376 $252K Reduce -4.8%
WTW Willis Towers Watson PLC 0.11% 817 $238K No change
Radiant Logistics 0.11% 33,052 $233K No change
WTM White Mountains Insurance GP 0.11% 100 $220K No change
KDP Keurig Dr Pepper Inc. 0.09% 7,445 $196K Reduce -4.5%
FISV Fiserv Inc. 0.09% 3,399 $190K Reduce -4.3%
BF.B Brown-Forman Corp. Class B 0.09% 6,804 $180K No change
COF Capital One Financial Corp. 0.08% 950 $173K No change
LBRDK Liberty Broadband-C 0.08% 3,324 $167K No change
PNFP Pinnacle Financial Partners 0.08% 1,909 $164K No change
SIRI Sirius XM Holdings Inc. 0.07% 7,396 $148K No change
LBYKV Liberty Global PLC-C-Wi 0.04% 7,820 $92K Reduce -1.9%
LBYAV Liberty Global PLC-A-Wi 0.03% 5,651 $68K No change
ENOV Enovis Corp. 0.02% 2,159 $49K Reduce -21.7%
CABO Cable One Inc. 0.01% 215 $20K No change
Other holdings (1): bonds, preferreds, convertibles and warrants · $281K (not counted above)
SecurityClassShares / PrincipalValueChange
CITIGROUP INC (C 6.875 PERP L) Equity 3,297$281KReduce -2.9%

Total filed on the 13F, all lines: $209.5M.

Portfolio Sells Q4 2025 → Q1 2026

IPMLF Imperial Metals Corp. Reduce -0.8% 4.61% −0.91
MKL Markel Group Inc. Reduce -2.4% 13.94% −0.58
MSFT Microsoft Corp. Reduce -2.3% 2.58% −0.54
ORCL Oracle Corp. Reduce -3.4% 1.57% −0.38
IBM Intl Business Machines Corp. Reduce -1.8% 1.95% −0.25
MCO Moody's Corp. Reduce -3.6% 1.55% −0.15
AXP American Express Co. Reduce -3.3% 0.84% −0.12
DIS The Walt Disney Co. Reduce -1.0% 1.03% −0.08
IDXX Idexx Laboratories Inc. Reduce -5.2% 0.94% −0.08
KHC The Kraft Heinz Co. Sold out 0.00% −0.07
WFC Wells Fargo & Co. Reduce -1.8% 0.75% −0.06
ABT Abbott Laboratories Reduce -2.6% 0.43% −0.06
MHK Mohawk Industries Inc. Reduce -7.6% 0.46% −0.04
BAC Bank of America Corp. Reduce -4.6% 0.48% −0.03
Medtronic Reduce -2.9% 0.86% −0.03
WYNN WYNN Resorts Ltd. Reduce -2.5% 0.28% −0.03
LDOS Leidos Holdings Inc. Reduce -1.6% 0.31% −0.02
JPM JPMorgan Chase & Co. Reduce -2.1% 1.18% −0.01
ESAB Esab Corp. Reduce -4.5% 0.14% −0.01
AMZN Amazon.com Inc. Reduce -2.5% 0.46% −0.01
FISV Fiserv Inc. Reduce -4.3% 0.09% −0.01
ENOV Enovis Corp. Reduce -21.7% 0.02% −0.01
EG Everest Group Ltd. Reduce -7.8% 0.31% −0.01
KDP Keurig Dr Pepper Inc. Reduce -4.5% 0.09% −0.00
GOOGL Alphabet Inc. Class A Reduce -1.4% 6.44% +0.00
LOW Lowe's Cos Inc. Reduce -7.1% 0.45% +0.00
CACC Credit Acceptance Corp. Reduce -4.7% 0.51% +0.00
LECO Lincoln Electric Holdings Reduce -11.3% 0.15% +0.00
PG The Procter & Gamble Co. Reduce -8.6% 0.23% +0.00
WBD Warner Bros Discovery Inc. Reduce -4.2% 0.66% +0.01
LBYKV Liberty Global PLC-C-Wi Reduce -1.9% 0.04% +0.01
SEIC Sei Investments Company Reduce -1.3% 0.15% +0.01
CI The Cigna Group Reduce -0.3% 0.14% +0.01
SYY Sysco Corp. Reduce -4.0% 0.32% +0.01
UPS United Parcel Service Class A Reduce -3.2% 0.18% +0.01
CMCSA Comcast Corp. Class A Reduce -1.2% 0.22% +0.01
MDLZ Mondelez International Inc. Class A Reduce -4.8% 0.12% +0.01
GOOG Alphabet Inc. Class C Reduce -0.4% 3.80% +0.02
CNI Canadian Natl Railway Co. Reduce -7.1% 0.35% +0.02
John Marshall Bank Reduce -2.6% 0.36% +0.03
WRB WR Berkley Corp. Reduce -0.8% 0.93% +0.03
GS Goldman Sachs Group Inc. Reduce -3.5% 1.66% +0.04
ABBV Abbvie Inc. Reduce -2.4% 1.86% +0.05
BUD Anheuser-Busch Inbev-SPN ADR Reduce -3.4% 0.54% +0.07
ETN Eaton Corp. PLC Reduce -3.1% 0.54% +0.09
CSX CSX Corp. Reduce -3.1% 0.74% +0.13
GD General Dynamics Corp. Reduce -1.4% 1.36% +0.14
MCD McDonald's Corp. Reduce -2.3% 1.53% +0.14
PEP Pepsico Inc. Reduce -1.4% 1.15% +0.18
KO The Coca-Cola Co. Reduce -2.8% 1.40% +0.20

Portfolio Buys Q4 2025 → Q1 2026

None this quarter.

Notes & Other Activity Q4 2025 → Q1 2026

CITIGROUP INC (C 6.875 PERP L) Equity Reduce -2.9% 3,297 $281K

Bonds, preferreds, convertibles and warrants; not part of the stock holdings or percentages above.

All Filings

QuarterPositions13F Reported ValueTop Holdings
Q2 2026 75$220.0MBRK.B, MKL, GOOGL, GOOG, IPMLF
Q1 2026 77$209.2MBRK.B, MKL, GOOGL, IPMLF, GOOG
Q4 2025 78$231.2MBRK.B, MKL, GOOGL, IPMLF, GOOG
Q3 2025 81$217.7MBRK.B, MKL, GOOGL, MSFT, IPMLF
Q2 2025 82$206.1MBRK.B, MKL, GOOGL, MSFT, PM
Q1 2025 81$203.4MBRK.B, MKL, GOOGL, PM, MSFT
Q4 2024 81$192.6MBRK.B, MKL, GOOGL, MSFT, GOOG
Q3 2024 80$189.8MBRK.B, MKL, GOOGL, MSFT, GOOG
Q2 2024 81$175.5MBRK.B, MKL, GOOGL, MSFT, GOOG
Q1 2024 81$177.1MBRK.B, MKL, GOOGL, MSFT, GOOG