AVENIR CORP

Long Only Manager • Value

AVENIR CORP is a Value-focused institution based in Alexandria, VA led by Charles Green Mackall, reporting $1.0B in AUM as of Q3 2025 with 30% Technology concentration and 74% concentrated in top 10 holdings.

ChairmanCharles Green Mackall

Portfolio Value: $960.1M
Positions: 73
Top Holding: MSFT at 13.62%
Last Reported: Q3 2025

Address277 South Washington Street, Suite 350, Alexandria, VA, 22314, United States

Top Holdings

Largest long holdings in AVENIR CORP's portfolio (73.6% of total portfolio)

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GthenH

Holding	Sector	Position	Weight	Traded	Ownership	Owned Since
1 Microsoft MSFT	Software - Infrastructure Technology	$130.7M	13.62%	-$6.8M Sold	0.00% 252.4K shares	Q3 2013 Held for 12y 2m
2 Markel MKL	Insurance - Property & Casualty Financial Services	$89.3M	9.31%	-$3.9M Sold	0.37% 46.7K shares	≤ Q2 2013 Held for 12y 5m+
3 Amazon AMZN	Specialty Retail Consumer Cyclical	$84.4M	8.79%	-$3.5M Sold	0.00% 384.2K shares	Q2 2016 Held for 9y 5m
4 O'Reilly Automotive ORLY	Specialty Retail Consumer Cyclical	$82.4M	8.58%	-$3.2M Sold	0.09% 764.1K shares	Q1 2017 Held for 8y 8m
5 American Tower AMT	REIT - Specialty Real Estate	$80.7M	8.40%	-$2.6M Sold	0.09% 419.5K shares	≤ Q2 2013 Held for 12y 5m+
6 Apple AAPL	Consumer Electronics Technology	$59.5M	6.20%	-$2.1M Sold	0.00% 233.8K shares	Q4 2016 Held for 8y 11m
7 Berkshire Hathaway BRK.B	Insurance - Diversified Financial Services	$55.7M	5.80%	-$1.2M Sold	0.01% 110.7K shares	Q4 2019 Held for 5y 11m
8 Copart CPRT	Auto - Dealerships Consumer Cyclical	$50.1M	5.22%	-$1.8M Sold	0.12% 1.1M shares	Q2 2018 Held for 7y 5m
9 Adobe ADBE	Software - Infrastructure Technology	$37.9M	3.95%	+$11.3M Bought	0.03% 107.5K shares	Q2 2025 Held for 5 months
10 Mastercard MA	Financial - Credit Services Financial Services	$35.7M	3.72%	-$1.5M Sold	0.01% 62.7K shares	Q3 2015 Held for 10y 2m

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Changes

Portfolio activity, position movements, and quarter-over-quarter changes in AVENIR CORP's latest filing

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Market Value

$960.1M

Prior: $972.9M

Q/Q Change

-1.32%

-$12.9M

Net Flows % of MV

-1.94%

Turnover Ratio

2.65%

New Purchases

2 stocks

$805.7K

Added To

12 stocks

+$15.2M

Sold Out Of

4 stocks

$1.5M

Reduced Holdings

23 stocks

-$33.1M

Increased Positions

Position	Shares Δ	Change
1 CCC CCC Intelligent Solutions Holdings Inc. CCC	New	0 → 65.8K +$599.2K
2 Invesco QQQ Trust QQQ	New	0 → 344.0 +$206.5K
3 Lamar Advertising LAMR	+51.04%	3.9K → 5.8K +$241.2K
4 Adobe ADBE	+42.23%	75.6K → 107.5K +$11.3M
5 Starwood Property Trust STWD	+33.45%	95.8K → 127.8K +$620.7K

Decreased Positions

Position	Shares Δ	Change
1 CCC Intelligent Solutions Holdings Inc. CCCS	Sold	65.9K → 0 −$620.3K
2 Walgreens Boots Alliance WBA	Sold	51.4K → 0 −$590.5K
3 Burke & Herbert Financial Services Corp. BHRB	Sold	3.5K → 0 −$206.1K
4 Luna Innovations LUNA	Sold	119.1K → 0 −$105.4K
5 DigitalBridge Group DBRG	-37.57%	117.1K → 73.1K −$514.9K