Stocks/Funds/CIK 1033475

AVENIR CORP

long-term holder
Quarterly 13F filings · Latest period 2026-03-31 · CIK 1033475
Assets
$820M
-13.9% YoY
Holdings
72
Lifetime alpha vs market
-10.95% annual
Average hold time
6.3 yr
median 6.3 yr

Quarterly history

Cum return -4% vs S&P +52% · α -56% lifetimeAUM $820M · peak $1.3BFlow $-12M (-1%)2016-062017-122019-062020-122022-062023-122025-062026-03
AUM ($B)fundS&P 500(gap = α)/ Flow in/out

Behavior signals (lifetime)

Dip response
-4.63%
trims when stocks drop
when a holding falls −10%+
Middle response
-3.26%
baseline attrition
Rally response
-4.06%
trims into rallies
when a holding rises +10%+

Top positions · 30

Ticker$ value% portYoYHold time
MSFTMicrosoft Corporation$90M11.0%-0.6%10.5 yr
MKLMarkel Corporation$88M10.7%+2.4%10.5 yr
AMZNAmazon.com, Inc.$78M9.5%+9.5%10.0 yr
AMTAmerican Tower Corporati$72M8.7%-17.9%10.5 yr
ORLYO'Reilly Automotive, Inc$69M8.4%-3.4%9.3 yr
AAPLApple Inc.$58M7.1%+14.7%9.5 yr
BRK-BBerkshire Hathaway Inc.$52M6.4%10.5 yr
CPRTCopart, Inc.$37M4.5%-41.3%8.0 yr
MAMastercard Incorporated$33M4.0%-8.5%10.5 yr
ADBEAdobe Inc.$31M3.8%-36.6%1.3 yr
WAYWaystar Holding Corp.$23M2.9%-35.5%1.8 yr
AMTMAmentum Holdings, Inc.$22M2.7%+43.3%1.5 yr
OLEDUniversal Display Corpor$21M2.6%-33.3%10.5 yr
LMTLockheed Martin Corporat$19M2.4%+39.0%5.8 yr
BOKFBOK Financial Corporatio$16M2.0%+25.7%10.3 yr

Portfolio composition (YoY)

Industry mix
Specialty Retail18.0%+1.0pp$147M
Software - Infrastructure11.1%+0.3pp$91M
Insurance - Property & Casualty10.7%+1.0pp$88M
REIT - Specialty10.5%-1.2pp$86M
Consumer Electronics7.1%+1.3pp$58M
Insurance - Diversified7.1%+0.0pp$58M
Financial - Credit Services5.5%+0.1pp$45M
Aerospace & Defense5.2%-0.1pp$42M
Specialty Business Services4.5%-2.2pp$37M
Software - Application3.8%$31M
Country
US99.5%+3.4pp
CA0.4%-3.4pp
BM0.1%+0.0pp
Top 5: 48.4% · Top 10: 74.0% · Top 25: 95.4%

Winners

TickerPrev $PnLYoY %
LMT$33M+0.01B39.0%
AAPL$55M+0.01B14.7%
AMZN$77M+0.01B9.5%
AMTM$16M+0.01B43.3%
BOKF$13M+0.00B25.7%

Losers

TickerPrev $PnLYoY %
CPRT$64M-0.03B-41.3%
AMT$95M-0.02B-17.9%
OLED$27M-0.01B-33.3%
WAY$23M-0.01B-35.5%
ERII$17M-0.01B-36.6%

Top buys this quarter · 7

WAY Waystar Holding Corp.+$23M
ATOM Atomera Incorporated+$3M
ADBE Adobe Inc.+$31M
MOH Molina Healthcare, Inc.new+$2M
MA Mastercard Incorporated+$33M
PODD Insulet Corporationnew+$0M
GEV GE Vernova Inc.new+$0M

Top sells this quarter · 15

LMT Lockheed Martin Corporation$20M
ERII Energy Recovery, Inc.$2M
AES The AES Corporationexit$1M
KMX CarMax, Inc.$1M
MKL Markel Corporation$1M
ORLY O'Reilly Automotive, Inc.$69M
AMZN Amazon.com, Inc.$1M
MSFT Microsoft Corporation$0M
AAPL Apple Inc.$0M
AMT American Tower Corporation$0M

Quarterly history (TTM returns)

PeriodAUM# PosReturn (1yr)SPY (1yr)Alpha (1yr)Flow
2026-03-31$820M72-6.48%+17.59%-24.07%-0.01B
2025-12-31$922M71+0.53%+17.72%-17.19%-0.01B
2025-09-30$960M73+4.07%+17.52%-13.45%-0.02B
2025-06-30$973M74+8.75%+14.94%-6.19%-0.03B
2025-03-31$953M70+5.28%+8.30%-3.02%+0.00B
2024-12-31$977M69+13.31%+24.89%-11.57%-0.02B
2024-09-30$992M66+27.50%+36.04%-8.53%-0.09B
2024-06-30$1.03B67+12.21%+24.49%-12.28%-0.17B
2024-03-31$1.17B66+19.83%+29.62%-9.79%-0.04B
2023-12-31$1.16B62+22.59%+26.18%-3.58%-0.06B
2023-09-30$1.07B60+13.85%+21.57%-7.72%+0.01B
2023-06-30$1.14B60+5.23%+19.42%-14.19%-0.02B
2023-03-31$1.06B62-18.91%-7.82%-11.09%-0.01B
2022-12-31$998M64+5.35%+7.56%-2.21%+0.00B
2022-09-30$943M60-14.51%-4.93%-9.58%+0.05B
2022-06-30$1.05B63-15.81%-16.11%+0.30%-0.01B