Blankinship & Foster, LLC
SEC Form 13F institutional filer · CIK 0001708872
13F-HR · 38 reported holdings · 2026-03-31
Reported long-US-equity value
$0.12B
Top-10 concentration
83.1%
Blankinship & Foster, LLC — $124M AUM allocation strategy
Blankinship & Foster, LLC files SEC Form 13F and reports $124M of long US equity value across 38 reported holdings for 2026-03-31.
Its largest sector bet is Industrials 24.5%, followed by Financials 9.1% and Information Technology 8.2%.
The top 10 holdings account for 83% 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.
Blankinship & Foster, LLC — latest SEC 13F insights
Reported long-US-equity value (13F AUM)
$124M
total across 38 reported holdings · 2026-03-31 · excludes shorts, cash, non-US
Top-10 concentration
83% of value
higher = narrower conviction; lower = spread / hedging
Biggest adds (shares)
+$AAPL +10.7K sh · +$2.37M+$AMZN +997 sh · +$151K+$NVDA +860 sh · +$114K
Biggest trims (shares)
−$XYL −29.6K sh · −$749K−$VTI −2.58K sh · −$2.28M−$SCHW −1.4K sh · +$36.4K
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)
- Industrial Machinery & Supplies & Components20.8%—
- Technology Hardware, Storage & Peripherals6.0%—
- Investment Banking & Brokerage4.6%—
- Interactive Media & Services3.9%—
- Aerospace & Defense2.9%—
- Multi-Sector Holdings2.7%—
- Biotechnology2.7%—
- Semiconductors1.3%—
- Other holdings55.0%—
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
6 of 6 rows · sorted by Value ↓
| Ticker | Holding | Shares | Value | Δ QoQ | Weight |
|---|---|---|---|---|---|
| $XYL | Xylem Inc. Common Stock New | 522K | $25.8M | -29.6K | 20.8% |
| $AAPL | Apple Inc | 29.3K | $7.43M | +10.7K | 6.0% |
| $SCHW | Charles Schwab Corporation | 185K | $5.74M | -1.4K | 4.6% |
| $HONA | Honeywell Aerospace Inc | 5 | $3.59M | +0 | 2.9% |
| $BRK.B | Berkshire Hathaway Inc.-Class B | 7.15K | $3.43M | -2 | 2.8% |
| $ABBV | AbbVie Inc | 15.4K | $3.35M | -114 | 2.7% |
…and 32 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
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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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