BANK OF STOCKTON
SEC Form 13F institutional filer · CIK 0001387723
13F-HR · 108 reported holdings · 2026-03-31
Reported long-US-equity value
$0.29B
Top-10 concentration
64.0%
BANK OF STOCKTON — $293M AUM allocation strategy
BANK OF STOCKTON files SEC Form 13F and reports $293M of long US equity value across 108 reported holdings for 2026-03-31.
Its largest sector bet is Information Technology 10.9%, followed by Financials 8.8% and Communication Services 4.8%.
The top 10 holdings account for 64% 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.
BANK OF STOCKTON — latest SEC 13F insights
Reported long-US-equity value (13F AUM)
$293M
total across 108 reported holdings · 2026-03-31 · excludes shorts, cash, non-US
Top-10 concentration
64% of value
higher = narrower conviction; lower = spread / hedging
Biggest adds (shares)
+$CMCSA +16.4K sh · +$452K+$T +6.28K sh · +$217K+$UNP +4.8K sh · +$1.18M
Biggest trims (shares)
−$IVV −151K sh · −$14.8M−$WFC −15.9K sh · −$2.04M−$XLF −15.8K sh · −$889K
Exited to nil (held last quarter, gone now)
$HPE ($721K last qtr)$SLB ($468K last qtr)$BALL ($332K last qtr)$FE ($294K last qtr)$TAP ($263K 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)
- Financial Exchanges & Data4.2%—
- Consumer Staples Merchandise Retail3.9%—
- Interactive Media & Services3.8%—
- Technology Hardware, Storage & Peripherals3.8%—
- Diversified Banks3.3%—
- Semiconductors2.8%—
- Systems Software2.5%—
- Semiconductor Materials & Equipment1.8%—
- Other holdings73.9%—
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
9 of 9 rows · sorted by Value ↓
| Ticker | Holding | Shares | Value | Δ QoQ | Weight |
|---|---|---|---|---|---|
| $SPGI | S&P Global Inc | 64.2K | $12.2M | -9.44K | 4.2% |
| $AAPL | Apple Inc | 43.3K | $11M | +686 | 3.8% |
| $GOOG | Alphabet Inc. Class C Capital Stock | 29.6K | $8.51M | -1.84K | 2.9% |
| $MSFT | Microsoft Corporation | 19.8K | $7.31M | +2.77K | 2.5% |
| $COST | Costco Wholesale Corporation | 6.92K | $6.89M | +4 | 2.4% |
| $JPM | JP Morgan Chase & Co | 21.7K | $6.39M | -1.09K | 2.2% |
| $KLAC | KLA Corporation | 3.56K | $5.24M | -471 | 1.8% |
| $MU | Micron Technology Inc | 14.4K | $4.86M | -2.85K | 1.7% |
| $WMT | Walmart Inc | 37.7K | $4.69M | -4.97K | 1.6% |
…and 99 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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