WINMILL & CO. INC
SEC Form 13F institutional filer · CIK 0000052234
13F-HR · 19 reported holdings · 2026-03-31
Reported long-US-equity value
$0.19B
Top-10 concentration
92.4%
WINMILL & CO. INC — $190M AUM allocation strategy
WINMILL & CO. INC files SEC Form 13F and reports $190M of long US equity value across 19 reported holdings for 2026-03-31.
Its largest sector bet is Financials 22.5%, followed by Materials 17.1% and Communication Services 16.8%.
The top 10 holdings account for 92% 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.
WINMILL & CO. INC — latest SEC 13F insights
Reported long-US-equity value (13F AUM)
$190M
total across 19 reported holdings · 2026-03-31 · excludes shorts, cash, non-US
Top-10 concentration
92% of value
higher = narrower conviction; lower = spread / hedging
Added from nil (new positions)
None this quarter
Exited to nil (held last quarter, gone now)
$AZO ($24M last qtr)$PYPL ($7.59M last qtr)$QCOM ($718K 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)
- Interactive Media & Services16.8%—
- Steel16.0%—
- Semiconductor Materials & Equipment12.3%—
- Investment Banking & Brokerage11.6%—
- Homefurnishing Retail10.7%—
- Property & Casualty Insurance6.7%—
- Health Care Facilities6.6%—
- Trading Companies & Distributors5.9%—
- Other holdings13.4%—
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 |
|---|---|---|---|---|---|
| $GOOG | Alphabet Inc. Class C Capital Stock | 108K | $31.1M | +0 | 16.4% |
| $STLD | Steel Dynamics Inc | 169K | $30.4M | +0 | 16.0% |
| $LRCX | Lam Research Corporation | 109K | $23.3M | +0 | 12.3% |
| $IBKR | Interactive Brokers Group Inc | 327K | $21.9M | +0 | 11.6% |
| $WSM | Williams-Sonoma Inc | 112K | $20.4M | +0 | 10.7% |
| $PGR | Progressive Corporation | 64K | $12.7M | +0 | 6.7% |
| $HCA | HCA Healthcare Inc | 26.4K | $12.5M | +0 | 6.6% |
| $URI | United Rentals Inc | 15.4K | $11.2M | +0 | 5.9% |
| $NVR | NVR Inc | 1.06K | $7M | +0 | 3.7% |
| $MA | Mastercard Incorporated | 10K | $5M | +0 | 2.6% |
…and 9 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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