Avenir Corp.

In its 13F for Q1 2026 (holdings as of March 31, 2026, filed May 14, 2026), Avenir Corp. reported 72 stock positions worth $820.5 million. Its top holding was Microsoft (MSFT) at 11.0% of the portfolio, followed by Markel (MKL, 10.7%) and Amazon.com (AMZN, 9.5%). Compared with Q4 2025, it opened 5 new positions, sold out of 4, added to 4 and reduced 23. The biggest buy was Atomera (ATOM, shares +138%) and the biggest sale Microsoft (MSFT, shares −1%).

Most Recent 13F
Q2 2026
Location
ALEXANDRIA, VA
CIK
0001033475
Portfolio Value
$820.5M (Q1 2026)
SEC Filing
0001033475-26-000005 ↗ filed May 14, 2026

Holdings Value

0$500.0M$1.0B$1.5B Q1 2024: $1.2B Q1 2024 Q2 2024: $1.0B Q2 2024 Q3 2024: $991.7M Q3 2024 Q4 2024: $976.8M Q4 2024 Q1 2025: $953.0M Q1 2025 Q2 2025: $972.9M Q2 2025 Q3 2025: $960.1M Q3 2025 Q4 2025: $921.7M Q4 2025 Q1 2026: $820.5M $820.5M Q1 2026 Q2 2026: $820.7M Q2 2026

Holdings 72 stocks · $820.5M
MSFT Microsoft Corp. 11.01% 244,110 $90.4M Reduce -0.5%
MKL Markel Group Inc. 10.69% 45,832 $87.7M Reduce -1.2%
AMZN Amazon.com Inc. 9.53% 375,273 $78.2M Reduce -0.9%
AMT American Tower Corp. 8.74% 415,352 $71.7M Reduce -0.6%
ORLY O'reilly Automotive Inc. 8.43% 749,700 $69.2M Reduce -1.1%
AAPL Apple Inc. 7.08% 228,871 $58.1M Reduce -0.7%
BRK.B Berkshire Hathaway Inc. Class B 6.36% 108,941 $52.2M Reduce -0.7%
CPRT Copart Inc. 4.49% 1,109,001 $36.8M Reduce -0.7%
MA Mastercard Inc. Class A 3.96% 65,067 $32.5M Add +3.1%
ADBE Adobe Inc. 3.75% 126,638 $30.8M Add +10.8%
WAY Waystar Holding Corp. 2.86% 973,260 $23.5M Add +30.4%
AMTM Amentum Holdings Inc. 2.67% 841,099 $21.9M Reduce -1.2%
OLED Universal Display Corp. 2.57% 230,152 $21.1M Reduce -0.0%
LMT Lockheed Martin Corp. 2.35% 31,952 $19.3M Reduce -50.3%
BOKF Bok Financial Corporation 1.95% 124,957 $16.0M Reduce -0.0%
V Visa Inc. Class A 1.51% 41,075 $12.4M Reduce -1.0%
MPLX MPLX LP 1.30% 186,892 $10.7M No change
SBAC SBA Communications Corp. 1.30% 61,747 $10.6M Reduce -1.9%
ET Energy Transfer LP 1.06% 451,327 $8.7M No change
ERII Energy Recovery Inc. 1.00% 817,755 $8.2M Reduce -15.7%
ATOM Atomera Inc. 0.68% 1,461,415 $5.6M Add +137.9%
KMI Kinder Morgan Inc. 0.59% 145,185 $4.9M No change
EPD Enterprise Products Partners 0.58% 125,478 $4.7M No change
BRK.A Berkshire Hathaway Inc. Class A 0.53% 6 $4.3M No change
GOOG Alphabet Inc. Class C 0.38% 10,770 $3.1M No change
CTSO Cytosorbents Corp. 0.36% 5,215,776 $3.0M Reduce -0.3%
EQIX Equinix Inc. 0.33% 2,741 $2.7M No change
STWD Starwood Property Trust Inc. 0.29% 136,193 $2.3M Reduce -0.4%
PHYS Sprott Physical Gold Trust 0.26% 60,310 $2.1M No change
MOH Molina Healthcare Inc. 0.24% 14,762 $2.0M New
AX Axos Financial Inc. 0.22% 20,790 $1.8M No change
AIG American International Group 0.19% 20,180 $1.5M No change
COHR Coherent Corp. 0.18% 6,110 $1.5M No change
XOM Exxon Mobil Corp. 0.17% 8,345 $1.4M No change
BRSP Brightspire Capital Inc. 0.15% 221,900 $1.2M No change
BAC Bank of America Corp. filed as BANK AMERICA CORP 0.15% 24,690 $1.2M No change
VOO Vanguard S&P 500 ETF 0.14% 1,930 $1.2M No change
BSM Black Stone Minerals LP 0.14% 73,900 $1.1M No change
ADPT Adaptive Biotechnologies 0.13% 76,365 $1.1M No change
BN Brookfield Corp. 0.11% 22,500 $911K No change
GLD SPDR Gold Shares 0.11% 2,114 $910K No change
LAMR Lamar Advertising Co. Class A 0.10% 6,780 $859K No change
BIP Brookfield Infrastructure Pa 0.10% 23,071 $833K No change
GOOD Gladstone Commercial Corp. 0.09% 66,748 $763K Reduce -0.4%
PRVA Privia Health Group Inc. 0.09% 36,745 $756K No change
INTC Intel Corp. 0.06% 11,393 $503K No change
COST Costco Wholesale Corp. 0.06% 500 $498K No change
OPRX Optimizerx Corp. 0.06% 77,260 $485K No change
LHX L3HARRIS Technologies Inc. 0.06% 1,357 $468K No change
KMX Carmax Inc. 0.06% 11,021 $458K Reduce -70.8%
NEWT Newtekone Inc. 0.05% 40,800 $447K No change
WMT Walmart Inc. 0.05% 3,501 $435K No change
ANET Arista Networks Inc. 0.05% 3,370 $414K No change
VABK Virginia National Bankshares 0.05% 10,800 $413K No change
TRGP Targa Resources Corp. 0.05% 1,602 $402K No change
CCC CCC Intelligent Solutions Ho 0.04% 60,957 $366K Reduce -7.3%
ENVX Enovix Corp. 0.04% 62,828 $325K No change
ABBV Abbvie Inc. 0.04% 1,462 $318K No change
RTX RTX Corp. 0.04% 1,634 $315K No change
DLTR Dollar Tree Inc. 0.04% 2,860 $313K No change
CCI Crown Castle Inc. 0.03% 3,240 $263K No change
PNC PNC Financial Services Group 0.03% 1,266 $263K No change
GE General Electric filed as GE AEROSPACE 0.03% 925 $262K No change
PCAR Paccar Inc. 0.03% 2,250 $260K No change
DIS The Walt Disney Co. filed as DISNEY WALT CO 0.03% 2,609 $251K Reduce -1.4%
BHRB Burke & Herbert Financial SE 0.03% 4,000 $249K Reduce -19.7%
PODD Insulet Corp. 0.03% 1,130 $237K New
LULU Lululemon Athletica Inc. 0.03% 1,500 $230K Reduce -8.4%
ENB Enbridge Inc. 0.03% 3,975 $215K New
MGNI Magnite Inc. 0.03% 17,715 $210K New
GEV GE Vernova Inc. 0.02% 231 $202K New
TPVG Triplepoint Venture Growth B 0.01% 11,000 $55K No change

Portfolio Sells Q4 2025 → Q1 2026
MSFT Microsoft Corp. Reduce -0.5% 11.01% −1.87
LMT Lockheed Martin Corp. Reduce -50.3% 2.35% −1.02
ERII Energy Recovery Inc. Reduce -15.7% 1.00% −0.42
OLED Universal Display Corp. Reduce -0.0% 2.57% −0.35
CPRT Copart Inc. Reduce -0.7% 4.49% −0.25
AES AES Corp. Sold out 0.00% −0.15
MKL Markel Group Inc. Reduce -1.2% 10.69% −0.12
DBRG Digitalbridge Group Inc. Sold out 0.00% −0.12
KMX Carmax Inc. Reduce -70.8% 0.06% −0.10
V Visa Inc. Class A Reduce -1.0% 1.51% −0.07
ORCL Oracle Corp. Sold out 0.00% −0.03
SBAC SBA Communications Corp. Reduce -1.9% 1.30% −0.03
QQQ Invesco QQQ Trust Series 1 Sold out 0.00% −0.02
CCC CCC Intelligent Solutions Ho Reduce -7.3% 0.04% −0.01
LULU Lululemon Athletica Inc. Reduce -8.4% 0.03% −0.01
AMTM Amentum Holdings Inc. Reduce -1.2% 2.67% −0.00
BHRB Burke & Herbert Financial SE Reduce -19.7% 0.03% −0.00
CTSO Cytosorbents Corp. Reduce -0.3% 0.36% −0.00
DIS The Walt Disney Co. Reduce -1.4% 0.03% −0.00
GOOD Gladstone Commercial Corp. Reduce -0.4% 0.09% +0.02
STWD Starwood Property Trust Inc. Reduce -0.4% 0.29% +0.02
AMZN Amazon.com Inc. Reduce -0.9% 9.53% +0.04
AAPL Apple Inc. Reduce -0.7% 7.08% +0.28
BOKF Bok Financial Corporation Reduce -0.0% 1.95% +0.34
BRK.B Berkshire Hathaway Inc. Class B Reduce -0.7% 6.36% +0.38
AMT American Tower Corp. Reduce -0.6% 8.74% +0.78
ORLY O'reilly Automotive Inc. Reduce -1.1% 8.43% +0.94

Portfolio Buys Q4 2025 → Q1 2026
ATOM Atomera Inc. Add +137.9% 0.68% +0.53
MOH Molina Healthcare Inc. New 0.24% +0.24
WAY Waystar Holding Corp. Add +30.4% 2.86% +0.21
MA Mastercard Inc. Class A Add +3.1% 3.96% +0.05
PODD Insulet Corp. New 0.03% +0.03
ENB Enbridge Inc. New 0.03% +0.03
MGNI Magnite Inc. New 0.03% +0.03
GEV GE Vernova Inc. New 0.02% +0.02
ADBE Adobe Inc. Add +10.8% 3.75% −0.59

All Filings

QuarterPositions13F Reported ValueTop Holdings
Q2 2026 79$820.7MMSFT, MKL, AMZN, ORLY, AMT
Q1 2026 72$820.5MMSFT, MKL, AMZN, AMT, ORLY
Q4 2025 71$921.7MMSFT, MKL, AMZN, AMT, ORLY
Q3 2025 73$960.1MMSFT, MKL, AMZN, ORLY, AMT
Q2 2025 74$972.9MMSFT, MKL, AMT, AMZN, ORLY
Q1 2025 70$953.0MMSFT, AMT, MKL, ORLY, AMZN
Q4 2024 69$976.8MMSFT, MKL, AMZN, AMT, ORLY
Q3 2024 66$991.7MMSFT, AMT, MKL, AMZN, ORLY
Q2 2024 67$1.0BMSFT, MKL, AMT, AMZN, ORLY
Q1 2024 66$1.2BMSFT, MKL, AMT, AMZN, CPRT