RWWM, Inc.
SEC Form 13F institutional filer · CIK 0001507683
13F-HR · 19 reported holdings · 2026-03-31
Reported long-US-equity value
$0.45B
Top-10 concentration
98.7%
RWWM, Inc. — $451M AUM allocation strategy
RWWM, Inc. files SEC Form 13F and reports $451M of long US equity value across 19 reported holdings for 2026-03-31.
Its largest sector bet is Financials 56.3%, followed by Consumer Staples 16.9% and Energy 12.2%.
The top 10 holdings account for 99% 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.
RWWM, Inc. — latest SEC 13F insights
Reported long-US-equity value (13F AUM)
$451M
total across 19 reported holdings · 2026-03-31 · excludes shorts, cash, non-US
Top-10 concentration
99% of value
higher = narrower conviction; lower = spread / hedging
Biggest adds (shares)
+$KHC +704K sh · +$11.4M+$BRK.B +1.63K sh · −$4.9M+$ORCL +167 sh · −$38.5K
Biggest trims (shares)
−$XOM −74K sh · +$6.95M−$WFC −46.5K sh · −$27.7M−$IBM −3.15K sh · −$1.28M
Exited to nil (held last quarter, gone now)
$WMT ($266K last qtr)$GOOG ($255K last qtr)$SYK ($222K 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)
- Diversified Banks30.4%—
- Multi-Sector Holdings25.9%—
- Packaged Foods & Meats16.0%—
- Integrated Oil & Gas12.2%—
- Systems Software7.4%—
- Application Software2.8%—
- Apparel, Accessories & Luxury Goods2.5%—
- Consumer Staples Merchandise Retail0.9%—
- Other holdings1.9%—
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 |
|---|---|---|---|---|---|
| $WFC | Wells Fargo & Company | 1.72M | $137M | -46.5K | 30.4% |
| $BRK.B | Berkshire Hathaway Inc.-Class B | 244K | $117M | +1.63K | 25.9% |
| $KHC | The Kraft Heinz Company | 3.2M | $72.1M | +704K | 16.0% |
| $XOM | ExxonMobil Holdings Corporation | 322K | $54.5M | -74K | 12.1% |
| $MSFT | Microsoft Corporation | 90.7K | $33.6M | -1.74K | 7.4% |
| $ADBE | Adobe Inc | 50.5K | $12.3M | — | 2.7% |
| $LULU | lululemon athletica inc | 73.4K | $11.2M | — | 2.5% |
| $COST | Costco Wholesale Corporation | 4.23K | $4.21M | -75 | 0.9% |
| $AAPL | Apple Inc | 7.28K | $1.85M | -1.08K | 0.4% |
| $IBM | International Business Machines Corporation | 6.39K | $1.55M | -3.15K | 0.3% |
…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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