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AVENIR CORP — 13F Holdings & Portfolio

CIK 1033475 · latest 13F-HR filed 2026-08-13

Backtest portfolio

AVENIR CORP manages $820.7M in 13F-reported U.S. long-equity assets across 79 reported positions as of its 2026-06-30 13F-HR filing. Its largest disclosed positions are MSFT (10.89%), MKL (10.52%), AMZN (10.47%). Quarter over quarter (versus its 2026-03-31 filing) the fund opened 10 new positions and exited 3; 28 existing positions rose in reported value and 21 fell.

AUM is the long-equity portion reported on Form 13F-HR. Excludes short positions, cash, foreign holdings, and non-13F assets. For informational purposes only — not investment advice.

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AUM
$820.7M

Long-equity book

Holdings
79

Distinct positions

Period
2026-06-30

Filed 2026-08-13

Q/Q Activity
+10 / −3 / ↑28 / ↓21

vs 2026-03-31

Portfolio charts

Latest quarter's book, what changed, and how the portfolio has evolved across filings.

Portfolio map

Q2 26
MSFT10.9% · -2%MKL10.5% · -4%AMZN10.5% · -4%ORLY8.2% · -2%AMT8.1% · -2%AAPL7.6% · -6%BRK.B6.5% · -2%MA4.0% · -2%CPRT3.7% · -2%ADBE3.4% · +7%WAY2.9% · +18%OLED2.4% · -1%BOKF2.1% · -1%AMTM2.0% · -4%LMT1.9% · -2%V1.7% · -2%ATOM1.6% · +0%SBAC1.3% · +0%MPLX1.3% · -1%ET1.0% · -0%ERII0.8% · -15%KMI0.6% · -0%EPD0.6% · 0%BRK.A0.5% · 0%GOOG0.5% · +2%MOH0.4% · -3%EQIX0.3% · 0%COHR0.3% · -7%STWD0.3% · -1%AX0.2% · 0%CTSO0.2% · -0%PHYS0.2% · 0%ADPT0.2% · -2%INTC0.2% · 0%AIG0.2% · 0%BAC0.2% · 0%VOO0.2% · 0%BRSP0.1% · 0%XOM0.1% · 0%LAMR0.1% · 0%BSM0.1% · 0%DLTR0.1% · +180%BN0.1% · 0%PRVA0.1% · 0%BIP0.1% · 0%GLD0.1% · 0%GOOD0.1% · -6%NEWT0.1% · 0%ANET0.1% · +3%KMX0.1% · -0%VT0.1% · newVABK0.1% · 0%COST0.1% · 0%DPZ0.1% · newOPRX0.1% · -4%AGG0.0% · newWMT0.0% · 0%LHX0.0% · 0%ENVX0.0% · 0%TRGP0.0% · -11%

Box size = position value; colour = change in share count vs the prior quarter (green added, red trimmed, blue new). Rows split across managers or share classes are combined. Click a box for the stock.

Sector mix

% of 13F value

Sectors from each company's SIC code; funds and ETFs grouped separately.

Biggest buys and sells

Q1 26 → Q2 26

Estimated from the change in shares held × the quarter-end price, so price moves alone don't count as buying. New and exited positions are included.

13F assets and positions

4 quarters

Total reported 13F value (bars) and number of positions (line) each quarter. Value changes include market moves.

Top positions over time

reported value

The eight largest current positions, valued at each quarter end.

Concentration

top 10 = 73.4%

Cumulative share of the portfolio held in the largest N positions.

Firm Profile & Key People

As of the firm’s regulatory filing dated Sep 14, 2026.

Assets Under Management
$2.79B
Discretionary
$2.79B
Employees
20
Accounts
40
Address
817 BROADWAY
12TH FLOOR
NEW YORK, NY 10003
Phone
(347) 614-2682
Website
Name Title / Status Ownership Type
AVENIR MANAGEMENT HOLDINGS LP ControlDIRECT HOLDER
since Jan 2022
75% or moreDomestic Entity
CASELLA, GISELLECHIEF COMPLIANCE OFFICER
since Sep 2026
Less than 5%Individual
AVENIR MANAGEMENT GP LLC Control
Indirect owner via AVENIR MANAGEMENT HOLDINGS LP
GENERAL PARTNER
since Jan 2022
General partner, trustee or managerDomestic Entity
REYNOLDS, JAMES, MADISON Control
Indirect owner via AVENIR MANAGEMENT HOLDINGS LP
LIMITED PARTNER
since Jan 2022
25–50%Individual
REYNOLDS, JAMES, MADISON Control
Indirect owner via AVENIR MANAGEMENT GP LLC
MANAGING MEMBER
since Jan 2022
25–50%Individual
SUGRUE, ANDREW, GREGORY Control
Indirect owner via AVENIR MANAGEMENT HOLDINGS LP
LIMITED PARTNER
since Jan 2022
50–75%Individual
SUGRUE, ANDREW, GREGORY Control
Indirect owner via AVENIR MANAGEMENT GP LLC
MANAGING MEMBER
since Jan 2022
50–75%Individual
Ownership & leadership changes · 6 filings with changes since Jul 17, 2017

From the firm’s regulatory filings, newest first. Dates are filing dates: a filing that no longer lists someone does not say when they left.

Sep 14, 2026 filing
  • No longer listedDELUCA, CHRISTOPHER, THOMAS · CHIEF COMPLIANCE OFFICER · Less than 5% · listed since Oct 2022
  • AddedCASELLA, GISELLE · CHIEF COMPLIANCE OFFICER · Less than 5%
Mar 31, 2023 filing
  • No longer listedREYNOLDS, JAMES, MADISON · MEMBER · 25–50% · control person · listed since Jan 2017
  • No longer listedSUGRUE, ANDREW, GREGORY · MEMBER · 50–75% · control person · listed since Jan 2017
  • AddedAVENIR MANAGEMENT GP LLC · GENERAL PARTNER · General partner, trustee or manager · indirect via AVENIR MANAGEMENT HOLDINGS LP · control person
  • AddedAVENIR MANAGEMENT HOLDINGS LP · DIRECT HOLDER · 75% or more · control person
  • AddedREYNOLDS, JAMES, MADISON · LIMITED PARTNER · 25–50% · indirect via AVENIR MANAGEMENT HOLDINGS LP · control person
  • AddedREYNOLDS, JAMES, MADISON · MANAGING MEMBER · 25–50% · indirect via AVENIR MANAGEMENT GP LLC · control person
  • AddedSUGRUE, ANDREW, GREGORY · LIMITED PARTNER · 50–75% · indirect via AVENIR MANAGEMENT HOLDINGS LP · control person
  • AddedSUGRUE, ANDREW, GREGORY · MANAGING MEMBER · 50–75% · indirect via AVENIR MANAGEMENT GP LLC · control person
Oct 21, 2022 filing
  • No longer listedBARBOUR, RUSSELL, Locke · CHIEF COMPLIANCE OFFICER · Less than 5% · listed since Mar 2021
  • AddedDELUCA, CHRISTOPHER, THOMAS · CHIEF COMPLIANCE OFFICER · Less than 5%
Mar 31, 2022 filing
  • AddedBARBOUR, RUSSELL, Locke · CHIEF COMPLIANCE OFFICER · Less than 5%
  • ChangedREYNOLDS, JAMES, MADISON · title MEMBER/ CHIEF COMPLIANCE OFFICER → MEMBER
Jun 28, 2020 filing
  • ChangedREYNOLDS, JAMES, MADISON · title MEMBER → MEMBER/ CHIEF COMPLIANCE OFFICER
Mar 29, 2019 filing
  • AddedREYNOLDS, JAMES, MADISON · MEMBER · 25–50% · control person
Jul 17, 2017 filing (earliest on record)
  • ListedSUGRUE, ANDREW, GREGORY · MEMBER · 50–75% · control person

Quarter-over-quarter changes

Changes in reported position value vs the prior 13F, so price moves count too, not just shares bought or sold.

Top Adds (vs prior quarter)

Show all 28 →

Top Trims

Show all 21 →

New Positions

Show all 10 →

Exited Positions

Show all 3 →

AVENIR CORP Holdings (2026-06-30)

Rows tagged Call or Put are options positions, not stock. Per SEC Form 13F-HR, Value shows the notional value of the underlying (shares covered × underlying price), not the option premium. Shares is the number of underlying shares covered (divide by 100 for contract count).

# Issuer Symbol CUSIP Value Weight Shares Type
1 MICROSOFT CORP MSFT 594918104 $89.4M 10.89% 239,602 SH
2 MARKEL GROUP INC MKL 570535104 $86.4M 10.52% 44,214 SH
3 AMAZON COM INC AMZN 023135106 $85.9M 10.47% 360,572 SH
4 OREILLY AUTOMOTIVE INC ORLY 67103H107 $67.3M 8.20% 731,153 SH
5 AMERICAN TOWER CORP NEW AMT 03027X100 $66.6M 8.11% 407,116 SH
6 APPLE INC AAPL 037833100 $62.3M 7.59% 215,158 SH
7 BERKSHIRE HATHAWAY INC DEL BRK.B 084670702 $53.6M 6.53% 107,115 SH
8 MASTERCARD INCORPORATED MA 57636Q104 $32.8M 3.99% 63,770 SH
9 COPART INC CPRT 217204106 $30.5M 3.71% 1,081,123 SH
10 ADOBE INC ADBE 00724F101 $27.8M 3.39% 135,581 SH
11 WAYSTAR HLDG CORP WAY 946784105 $23.5M 2.86% 1,144,717 SH
12 UNIVERSAL DISPLAY CORP OLED 91347P105 $19.7M 2.41% 228,014 SH
13 BOK FINL CORP BOKF 05561Q201 $17.2M 2.10% 124,017 SH
14 AMENTUM HOLDINGS INC AMTM 023939101 $16.8M 2.04% 811,726 SH
15 LOCKHEED MARTIN CORP LMT 539830109 $16.0M 1.95% 31,375 SH
16 VISA INC V 92826C839 $13.8M 1.68% 40,207 SH
17 ATOMERA INC ATOM 04965B100 $12.8M 1.56% 1,468,660 SH
18 SBA COMMUNICATIONS CORP NEW SBAC 78410G104 $10.9M 1.33% 61,979 SH
19 MPLX LP MPLX 55336V100 $10.4M 1.27% 185,366 SH
20 ENERGY TRANSFER LP ET 29273V100 $8.6M 1.05% 450,367 SH
21 ENERGY RECOVERY INC ERII 29270J100 $6.3M 0.76% 693,886 SH
22 KINDER MORGAN INC DEL KMI 49456B101 $4.6M 0.57% 145,135 SH
23 ENTERPRISE PRODS PARTNERS LP EPD 293792107 $4.6M 0.56% 125,478 SH
24 BERKSHIRE HATHAWAY INC DEL BRK.A 084670108 $4.5M 0.55% 6 SH
25 ALPHABET INC GOOG 02079K107 $3.9M 0.47% 10,975 SH
26 MOLINA HEALTHCARE INC MOH 60855R100 $3.3M 0.40% 14,356 SH
27 EQUINIX INC EQIX 29444U700 $2.9M 0.35% 2,741 SH
28 COHERENT CORP COHR 19247G107 $2.2M 0.27% 5,681 SH
29 STARWOOD PPTY TR INC STWD 85571B105 $2.2M 0.27% 134,478 SH
30 AXOS FINANCIAL INC. AX 05465C100 $2.0M 0.25% 20,790 SH
31 CYTOSORBENTS CORP CTSO 23283X206 $1.9M 0.24% 5,189,218 SH
32 SPROTT PHYSICAL GOLD TRUST PHYS 85207H104 $1.8M 0.22% 60,310 SH
33 ADAPTIVE BIOTECHNOLOGIES COR ADPT 00650F109 $1.6M 0.20% 74,865 SH
34 INTEL CORP INTC 458140100 $1.6M 0.19% 11,393 SH
35 AMERICAN INTL GROUP INC AIG 026874784 $1.5M 0.18% 20,180 SH
36 BANK AMERICA CORP BAC 060505104 $1.4M 0.17% 24,690 SH
37 VANGUARD INDEX FDS VOO 922908363 $1.3M 0.16% 1,930 SH
38 BRIGHTSPIRE CAPITAL INC BRSP 10949T109 $1.2M 0.15% 221,900 SH
39 EXXON MOBIL CORP XOM 30231G102 $1.1M 0.14% 8,345 SH
40 LAMAR ADVERTISING CO NEW LAMR 512816109 $1.1M 0.13% 6,780 SH
41 BLACK STONE MINERALS LP BSM 09225M101 $1.0M 0.13% 73,900 SH
42 DOLLAR TREE INC DLTR 256746108 $970.0K 0.12% 8,020 SH
43 BROOKFIELD CORP BN 11271J107 $958.3K 0.12% 22,500 SH
44 PRIVIA HEALTH GROUP INC PRVA 74276R102 $945.4K 0.12% 36,745 SH
45 BROOKFIELD INFRAST PARTNERS BIP G16252101 $841.9K 0.10% 23,071 SH
46 SPDR GOLD TRUST GLD 78463V107 $778.8K 0.09% 2,114 SH
47 GLADSTONE COMMERCIAL CORP GOOD 376536108 $773.4K 0.09% 62,878 SH
48 NEWTEK BUSINESS SVCS CORP NEWT 652526203 $604.2K 0.07% 40,800 SH
49 ARISTA NETWORKS INC ANET 040413205 $587.1K 0.07% 3,456 SH
50 CARMAX INC KMX 143130102 $582.8K 0.07% 11,020 SH
Filing History
Period Filed AUM Holdings Accession
2026-06-30 2026-08-13 $820.7M 79 0001033475-26-000006
2026-03-31 2026-05-14 $820.5M 72 0001033475-26-000005
2025-12-31 2026-02-13 $921.7M 71 0001033475-26-000002
2025-09-30 2025-11-14 $960.1M 73 0001033475-25-000009
Filer Information
Address
277 SOUTH WASHINGTON STREET
SUITE 350
ALEXANDRIA, VA 22314
Phone
(202) 659-4427
Filing Manager
AVENIR CORP
ALEXANDRIA, VA
Signatory
Kenneth S. George, II
CCO