Optiver Holding B.V.
SEC Form 13F institutional filer · CIK 0001859606
13F-HR · 188 reported holdings · 2026-03-31
SEC-registered institutional investment manager.
Reported long-US-equity value
$1.45B
Top-10 concentration
66.5%
Optiver Holding B.V. — $1.45B AUM allocation strategy
Optiver Holding B.V. files SEC Form 13F and reports $1.45B of long US equity value across 188 reported holdings for 2026-03-31.
Its largest sector bet is Information Technology 51.8%, followed by Financials 11.1%.
The top 10 holdings account for 66% 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.
Optiver Holding B.V. — latest SEC 13F insights
Reported long-US-equity value (13F AUM)
$1.45B
total across 188 reported holdings · 2026-03-31 · excludes shorts, cash, non-US
Top-10 concentration
66% of value
higher = narrower conviction; lower = spread / hedging
Biggest adds (shares)
+$XLE +1.38M sh · +$84.4M+$XLF +704K sh · +$28.7M+$BLK +479K sh · +$31.3M
Biggest trims (shares)
−$SPY −1.6M sh · −$1.09B−$SPGI −912K sh · −$57.9M−$AMZN −847K sh · −$196M
Exited to nil (held last quarter, gone now)
$NFLX ($87.2M last qtr)$TSLA ($85.4M last qtr)$MA ($33.2M last qtr)$BEN ($26.8M last qtr)$COST ($25.6M 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)
- Semiconductors24.9%—
- Application Software20.3%—
- Systems Software4.6%—
- Asset Management & Custody Banks3.4%—
- Multi-Sector Holdings2.4%—
- Investment Banking & Brokerage2.1%—
- Semiconductor Materials & Equipment2.0%—
- Consumer Finance1.9%—
- Other holdings38.3%—
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
7 of 7 rows · sorted by Value ↓
| Ticker | Holding | Shares | Value | Δ QoQ | Weight |
|---|---|---|---|---|---|
| $ORCL | Oracle Corporation | 1.41M | $207M | +25K | 14.3% |
| $MU | Micron Technology Inc | 584K | $197M | +236K | 13.6% |
| $AVGO | Broadcom Inc | 315K | $97.4M | -21.5K | 6.7% |
| $PLTR | Palantir Technologies Inc | 483K | $70.6M | -241K | 4.9% |
| $AMD | Advanced Micro Devices Inc | 326K | $66.4M | +68.1K | 4.6% |
| $BLK | BlackRock Inc | 613K | $49M | +479K | 3.4% |
| $BRK.B | Berkshire Hathaway Inc.-Class B | 73.8K | $35.4M | +70.4K | 2.4% |
…and 181 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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