OAKTOP CAPITAL MANAGEMENT II, L.P.
SEC Form 13F institutional filer · CIK 0001550660
13F-HR · 9 reported holdings · 2026-03-31
SEC-registered institutional investment manager.
Reported long-US-equity value
$1.27B
Top-10 concentration
100.0%
OAKTOP CAPITAL MANAGEMENT II, L.P. — $1.27B AUM allocation strategy
OAKTOP CAPITAL MANAGEMENT II, L.P. files SEC Form 13F and reports $1.27B of long US equity value across 9 reported holdings for 2026-03-31.
Its largest sector bet is Information Technology 95.8%, followed by Health Care 2.3% and Financials 1.0%.
The top 10 holdings account for 100% 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.
OAKTOP CAPITAL MANAGEMENT II, L.P. — latest SEC 13F insights
Reported long-US-equity value (13F AUM)
$1.27B
total across 9 reported holdings · 2026-03-31 · excludes shorts, cash, non-US
Top-10 concentration
100% of value
higher = narrower conviction; lower = spread / hedging
Added from nil (new positions)
None this quarter
Exited to nil (held last quarter, gone now)
None this quarter
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)
- Semiconductor Materials & Equipment73.6%—
- Semiconductors20.5%—
- Pharmaceuticals2.3%—
- Technology Hardware, Storage & Peripherals1.7%—
- Property & Casualty Insurance1.0%—
- Consumer Electronics0.9%—
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
9 of 9 rows · sorted by Value ↓
| Ticker | Holding | Shares | Value | Δ QoQ | Weight |
|---|---|---|---|---|---|
| $LRCX | Lam Research Corporation | 2.25M | $481M | -141K | 37.7% |
| $KLAC | KLA Corporation | 311K | $458M | +0 | 35.9% |
| $ADI | Analog Devices Inc | 466K | $148M | +0 | 11.6% |
| $AVGO | Broadcom Inc | 363K | $112M | +0 | 8.8% |
| $BMY | Bristol-Myers Squibb Company | 480K | $29.1M | +0 | 2.3% |
| $DELL | Dell Technologies Inc | 131K | $21.4M | +0 | 1.7% |
| $PGR | Progressive Corporation | 509K | $13M | +0 | 1.0% |
| $GRMN | Garmin Ltd | 48K | $11.1M | +0 | 0.9% |
| $INTC | Intel Corporation | 23K | $1.02M | +0 | 0.1% |
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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