Robeco Schweiz AG
SEC Form 13F institutional filer · CIK 0001418427
13F-HR · 65 reported holdings · 2026-03-31
SEC-registered institutional investment manager.
Reported long-US-equity value
$2.80B
Top-10 concentration
48.4%
Robeco Schweiz AG — $2.8B AUM allocation strategy
Robeco Schweiz AG files SEC Form 13F and reports $2.8B of long US equity value across 65 reported holdings for 2026-03-31.
Its largest sector bet is Information Technology 31.0%, followed by Industrials 30.5% and Health Care 8.8%.
The top 10 holdings account for 48% of reported value — a broadly spread portfolio. 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.
Robeco Schweiz AG — latest SEC 13F insights
Reported long-US-equity value (13F AUM)
$2.8B
total across 65 reported holdings · 2026-03-31 · excludes shorts, cash, non-US
Top-10 concentration
48% of value
higher = narrower conviction; lower = spread / hedging
Biggest adds (shares)
+$ON +657K sh · +$50.8M+$MRVL +279K sh · +$40.7M+$VLTO +117K sh · +$2.04M
Biggest trims (shares)
−$PTC −300K sh · −$54.5M−$IR −253K sh · −$20M−$LITE −185K sh · +$3.5M
Exited to nil (held last quarter, gone now)
$DELL ($13.8M last qtr)$GDDY ($13.7M last qtr)$WSM ($276K last qtr)$AVY ($201K 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)
- Semiconductors21.3%—
- Life Sciences Tools & Services8.8%—
- Construction & Engineering8.0%—
- Electrical Components & Equipment6.5%—
- Industrial Machinery & Supplies & Components5.6%—
- Communications Equipment5.4%—
- Building Products4.5%—
- Application Software4.4%—
- Other holdings35.5%—
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 |
|---|---|---|---|---|---|
| $VRT | Vertiv Holdings LLC | 723K | $181M | -151K | 6.5% |
| $PWR | Quanta Services Inc | 323K | $178M | +3.27K | 6.3% |
| $LITE | Lumentum Holdings Inc | 215K | $151M | -185K | 5.4% |
| $A | Agilent Technologies Inc | 1.12M | $127M | +68.5K | 4.5% |
| $FSLR | First Solar Inc | 646K | $127M | +107K | 4.5% |
| $ADI | Analog Devices Inc | 394K | $125M | +88.7K | 4.5% |
| $ADSK | Autodesk Inc | 513K | $123M | +5.75K | 4.4% |
| $ON | ON Semiconductor Corporation | 1.96M | $122M | +657K | 4.3% |
| $MRVL | Marvell Technology Inc | 1.2M | $119M | +279K | 4.2% |
| $MPWR | Monolithic Power Systems Inc | 95K | $104M | -25 | 3.7% |
…and 55 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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