AVENIR CORP
SEC Form 13F institutional filer · CIK 0001033475
13F-HR · 39 reported holdings · 2026-03-31
SEC-registered institutional investment manager.
Reported long-US-equity value
$0.60B
Top-10 concentration
89.8%
AVENIR CORP — $600M AUM allocation strategy
AVENIR CORP files SEC Form 13F and reports $600M of long US equity value across 39 reported holdings for 2026-03-31.
Its largest sector bet is Information Technology 30.1%, followed by Consumer Discretionary 24.6% and Financials 16.5%.
The top 10 holdings account for 90% of reported value — a conviction-weighted book concentrated in its best ideas. The sector and industry splits below are of the same reported value. Track quarter-over-quarter adds, trims, new positions and exits below — sourced from SEC 13F filings, public domain.
AVENIR CORP — latest SEC 13F insights
Reported long-US-equity value (13F AUM)
$600M
total across 39 reported holdings · 2026-03-31 · excludes shorts, cash, non-US
Top-10 concentration
90% of value
higher = narrower conviction; lower = spread / hedging
Biggest trims (shares)
−$LMT −32.4K sh · −$11.8M−$ORLY −7.93K sh · +$101K−$CPRT −7.29K sh · −$6.88M
Exited to nil (held last quarter, gone now)
$AES ($1.37M last qtr)$ORCL ($263K last qtr)$QQQ ($211K last qtr)
Sector allocation (share of reported value)
each slice is a share of the reported long-US-equity value — smaller sectors and the rest of the book roll into “Other holdings”
Qtr shift = share-point change vs the prior quarter's filing — first period tracked for this filer; the column fills in with the next quarterly refresh.
Industry allocation (share of reported value)
- Systems Software15.1%—
- Telecom Tower REITs13.7%—
- Broadline Retail13.0%—
- Automotive Retail11.5%—
- Technology Hardware, Storage & Peripherals9.7%—
- Multi-Sector Holdings8.7%—
- Transaction & Payment Processing Services7.5%—
- Diversified Support Services6.1%—
- Other holdings14.7%—
the finer GICS cut of the same book — same denominator — smaller industries roll into “Other holdings”
Qtr shift = share-point change vs the prior quarter's filing — first period tracked for this filer; the column fills in with the next quarterly refresh.
Top S&P 500 holdings
10 of 10 rows · sorted by Value ↓
| Ticker | Holding | Shares | Value | Δ QoQ | Weight |
|---|---|---|---|---|---|
| $MSFT | Microsoft Corporation | 244K | $90.4M | -1.31K | 15.1% |
| $AMZN | Amazon.com Inc | 375K | $78.2M | -3.46K | 13.0% |
| $AMT | American Tower Corporation | 415K | $71.7M | -2.36K | 11.9% |
| $ORLY | O'Reilly Automotive Inc | 750K | $69.2M | -7.93K | 11.5% |
| $AAPL | Apple Inc | 229K | $58.1M | -1.69K | 9.7% |
| $BRK.B | Berkshire Hathaway Inc.-Class B | 109K | $52.2M | -807 | 8.7% |
| $CPRT | Copart Inc | 1.11M | $36.8M | -7.29K | 6.1% |
| $MA | Mastercard Incorporated | 65.1K | $32.5M | +1.98K | 5.4% |
| $ADBE | Adobe Inc | 127K | $30.8M | +12.3K | 5.1% |
| $LMT | Lockheed Martin Corporation | 32K | $19.3M | -32.4K | 3.2% |
…and 29 more holdings in the full 13F filing (top positions only shown).
SEC Form 13F data sets · public domain · 45-day filing lag · >$100M AUM managers · as reported
← All 13F filers·← QuantOrb.pro
How to read Δ QoQ — the five insight categories, and the caveats
The categories. Analysts, quants and retail traders look past total portfolio value to isolate actionable signals. Five categories matter.
Conviction & concentration shifts
New positions vs complete exits — a brand-new stock signals high conviction; a full liquidation suggests a broken thesis or tax-loss harvesting. Aggressive sizing — look at share count, not dollars: a 20% share increase during a drawdown is strong dip-buying. Concentration — a narrowing top-5/10 means conviction; spreading capital across more names means hedging.
Sector & macro allocation rotations
Aggregating Δ QoQ moves across sectors shows where smart money is leaning in or sneaking out — rotating out of growth into defensives or energy, for example. The fund's total long equity exposure quarter-over-quarter is a proxy for overall institutional risk appetite.
Crowding & smart-money consensus
When several managers initiate or expand the same stock in the same quarter, that is institutional consensus. Contrarian reads: top pickers buying hard into a beaten-down name the market is selling.
Derivative & option overlays
Reported call/put changes indicate whether managers are adding downside hedges or leveraging upside exposure. Note: a long increase may be half of a market-neutral pair trade.
Who reads this
| Retail "cloners" | High-conviction ideas to replicate ~45 days after quarter-end. |
| Corporate IR | Which funds bought or dumped the stock, before the next call. |
| Quant / algo traders | Cross-sectional factor inputs: flow, momentum, ownership. |
Four caveats before you trade on it
- 45-day lag — holdings are quarter-end; positions may already be closed.
- Long-only — 13Fs miss shorts, pair trades and cash.
- No non-US / fixed income — the picture is US equities plus options.
- Corporate actions — splits and spinoffs distort raw share deltas.
Newsletter signup
Free subscription. Daily trading day morning dispatch. No spam.