Yorktown Management & Research Co Inc
SEC Form 13F institutional filer · CIK 0001313559
13F-HR · 30 reported holdings · 2026-03-31
Reported long-US-equity value
$0.02B
Top-10 concentration
60.6%
Yorktown Management & Research Co Inc — $22.6M AUM allocation strategy
Yorktown Management & Research Co Inc files SEC Form 13F and reports $22.6M of long US equity value across 30 reported holdings for 2026-03-31.
Its largest sector bet is Information Technology 35.6%, followed by Industrials 24.5% and Financials 16.1%.
The top 10 holdings account for 61% 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.
Yorktown Management & Research Co Inc — latest SEC 13F insights
Reported long-US-equity value (13F AUM)
$22.6M
total across 30 reported holdings · 2026-03-31 · excludes shorts, cash, non-US
Top-10 concentration
61% of value
higher = narrower conviction; lower = spread / hedging
Exited to nil (held last quarter, gone now)
$HOOD ($1.39M last qtr)$IR ($768K last qtr)$SMCI ($584K last qtr)$UBER ($327K 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)
- Construction & Engineering19.6%—
- Communications Equipment11.7%—
- Systems Software8.1%—
- Investment Banking & Brokerage7.8%—
- Asset Management & Custody Banks6.5%—
- Semiconductor Materials & Equipment5.8%—
- Aerospace & Defense4.9%—
- Application Software4.6%—
- Other holdings31.0%—
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 |
|---|---|---|---|---|---|
| $FIX | Comfort Systems USA Inc | 3.21K | $4.43M | -290 | 19.6% |
| $PANW | Palo Alto Networks Inc | 8.91K | $1.43M | — | 6.3% |
| $KLAC | KLA Corporation | 890 | $1.31M | +0 | 5.8% |
| $ANET | Arista Networks Inc | 9.8K | $1.2M | +0 | 5.3% |
| $AXON | Axon Enterprise Inc | 2.65K | $1.13M | +0 | 5.0% |
| $RJF | Raymond James Financial Inc | 6.45K | $934K | +0 | 4.1% |
| $CASY | Casey's General Stores Inc | 1.2K | $873K | +0 | 3.9% |
| $IBKR | Interactive Brokers Group Inc | 12.4K | $832K | +0 | 3.7% |
| $BLK | BlackRock Inc | 10K | $796K | +2K | 3.5% |
| $LITE | Lumentum Holdings Inc | 1.13K | $791K | — | 3.5% |
…and 20 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.
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