Sunstone Asset Management, L.P.
SEC Form 13F institutional filer · CIK 0002111996
13F-HR · 24 reported holdings · 2026-03-31
Reported long-US-equity value
$0.05B
Top-10 concentration
58.5%
Sunstone Asset Management, L.P. — $48.3M AUM allocation strategy
Sunstone Asset Management, L.P. files SEC Form 13F and reports $48.3M of long US equity value across 24 reported holdings for 2026-03-31.
Its largest sector bet is Information Technology 61.1%, followed by Financials 9.2% and Consumer Discretionary 9.2%.
The top 10 holdings account for 58% 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.
Sunstone Asset Management, L.P. — latest SEC 13F insights
Reported long-US-equity value (13F AUM)
$48.3M
total across 24 reported holdings · 2026-03-31 · excludes shorts, cash, non-US
Top-10 concentration
58% of value
higher = narrower conviction; lower = spread / hedging
Biggest adds (shares)
+$AMAT +169K sh · +$3.09M+$NVDA +10K sh · +$1.5M+$SNPS +2.42K sh · +$593K
Biggest trims (shares)
−$FLEX −3.25K sh · −$43.8K−$AVGO −2.52K sh · −$971K−$SNDK −400 sh · +$940K
Exited to nil (held last quarter, gone now)
$TXN ($1.45M last qtr)$TTD ($759K last qtr)$DDOG ($436K last qtr)$SMCI ($410K 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)
- Semiconductors15.7%—
- Semiconductor Materials & Equipment11.0%—
- Systems Software10.2%—
- Application Software8.7%—
- Electronic Components8.0%—
- Specialized Consumer Services4.9%—
- Insurance Brokers4.8%—
- Transaction & Payment Processing Services4.6%—
- Other holdings32.3%—
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 |
|---|---|---|---|---|---|
| $NVDA | NVIDIA Corporation | 30.4K | $5.31M | +10K | 11.0% |
| $AMAT | Applied Materials Inc | 172K | $3.89M | +169K | 8.0% |
| $SNPS | Synopsys Inc | 7.43K | $2.95M | +2.42K | 6.1% |
| $PANW | Palo Alto Networks Inc | 17.1K | $2.74M | — | 5.7% |
| $DASH | DoorDash Inc | 15.7K | $2.36M | +1.84K | 4.9% |
| $MRSH | Marsh | 13.1K | $2.28M | +0 | 4.7% |
| $AMD | Advanced Micro Devices Inc | 11.1K | $2.26M | — | 4.7% |
| $V | Visa Inc | 7.3K | $2.21M | +0 | 4.6% |
| $MSFT | Microsoft Corporation | 5.9K | $2.18M | +1K | 4.5% |
| $ABNB | Airbnb Inc | 16.7K | $2.11M | +0 | 4.4% |
…and 14 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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