Rubicon Advisors, GP
SEC Form 13F institutional filer · CIK 0002114679
13F-HR · 32 reported holdings · 2026-03-31
Reported long-US-equity value
$0.06B
Top-10 concentration
82.1%
Rubicon Advisors, GP — $55.3M AUM allocation strategy
Rubicon Advisors, GP files SEC Form 13F and reports $55.3M of long US equity value across 32 reported holdings for 2026-03-31.
Its largest sector bet is Information Technology 38.7%, followed by Consumer Discretionary 22.3% and Communication Services 13.1%.
The top 10 holdings account for 82% 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.
Rubicon Advisors, GP — latest SEC 13F insights
Reported long-US-equity value (13F AUM)
$55.3M
total across 32 reported holdings · 2026-03-31 · excludes shorts, cash, non-US
Top-10 concentration
82% of value
higher = narrower conviction; lower = spread / hedging
Biggest adds (shares)
+$TROW +39.6K sh · +$1.25M+$IVV +2.62K sh · +$267K+$CVX +916 sh · +$344K
Biggest trims (shares)
−$VTI −5.53K sh · −$1.86M−$ROK −2.31K sh · −$926K−$AAPL −660 sh · −$1.06M
Exited to nil (held last quarter, gone now)
$SCHW ($520K last qtr)$BA ($253K last qtr)$DIS ($228K last qtr)$HD ($217K last qtr)$BAC ($203K 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)
- Technology Hardware, Storage & Peripherals22.5%—
- Automobile Manufacturers15.0%—
- Semiconductors13.6%—
- Interactive Media & Services13.1%—
- Asset Management & Custody Banks8.7%—
- Broadline Retail7.3%—
- Multi-Sector Holdings3.7%—
- Consumer Staples Merchandise Retail1.8%—
- Other holdings14.5%—
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 |
|---|---|---|---|---|---|
| $AAPL | Apple Inc | 48.8K | $12.4M | -660 | 22.4% |
| $TSLA | Tesla Inc | 22.2K | $8.27M | +385 | 15.0% |
| $NVDA | NVIDIA Corporation | 39.1K | $6.83M | +446 | 12.4% |
| $AMZN | Amazon.com Inc | 19.4K | $4.03M | +208 | 7.3% |
| $GOOGL | Alphabet Inc | 12.9K | $3.7M | +80 | 6.7% |
| $TROW | T. Rowe Price Group Inc | 103K | $3.61M | +39.6K | 6.5% |
| $GOOG | Alphabet Inc. Class C Capital Stock | 7.62K | $2.19M | +50 | 4.0% |
| $BRK.B | Berkshire Hathaway Inc.-Class B | 4.19K | $2.01M | -65 | 3.6% |
| $META | Meta Platforms Inc | 2.31K | $1.32M | +180 | 2.4% |
| $COST | Costco Wholesale Corporation | 1K | $996K | -14 | 1.8% |
…and 22 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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