OAKTOP CAPITAL MANAGEMENT II, L.P.

CIK

1550660

Location

Chatham, NJ

Portfolio Value

Mid $1,340,190,986

Diversification

Highly concentrated

Filing Date

Global Rank

#1,497 / 8,623 ▲ 157 · as of Mar 2026

Top Industry

Semiconductor Equipment & Materials 70.0%

3Y Alpha vs SPY

0.0%

Period ended 4 months ago

Filed May 14, 2026 · 3mo

25 quarters · since Mar 2020

Clone Performance

Jul 2023–Jul 2026 · vs SPY

Hypothetical growth of buying every stock this filer reported holding, rebalancing on each filing and indexed to the same start. Option positions cannot be bought this way and are left out.

Cloned portfolio

+164.1%

SPY

+65.3%

Annualised alpha

+20.0%

Max drawdown

−34.7%

Estimate. 13F holdings are quarter-lagged, so the clone rebalances about 45 days after each period end — when the filing becomes public — and it excludes option and short positions. It tracks 100% of reported value on average across 13 quarters. Past performance does not predict future results.

Portfolio Concentration

14 tracked positions · as of Mar 31, 2026 · Δ vs Dec 31, 2025

Top Position

35.9%

+1.2 pts

Top 5

91.6%

+1.2 pts

Top 10

98.2%

−0.0 pts

HHI

2,659

Highly concentrated+184

Portfolio Trend

25 quarters · across all stocks

Sector Breakdown

As of Mar 31, 2026

Sector	% Portfolio	Value	Positions
Technology	95.3%	$1,277,813,667	11
Healthcare	2.2%	$29,111,454	1
Industrials	1.3%	$17,676,865	1
Communication Services	1.2%	$15,589,000	1

Last Quarter's Activity

Export CSV

Mar 31, 2026 vs Dec 31, 2025

Added To

Positions the filer increased

2 positions

Ticker	Company	Δ Shares	Shares	Value
ASPN	Aspen Aerogels Inc	+774,149	5,168,674	$17,676,865
PINS	Pinterest, Inc.	+200,000	850,000	$15,589,000
No positions match the current search.

Trimmed

Positions the filer reduced

1 positions

Ticker	Company	Δ Shares	Shares	Value	Open
LRCX	Lam Research Corp	−141,390	2,249,394	$480,605,522
No positions match the current search.

New Positions

Positions the filer opened this quarter

1 positions

Ticker	Company	Shares	Value	Open
ARM	Arm Holdings PLC /Uk	20,000	$3,025,600
No positions match the current search.

Sold Out

Positions the filer fully exited

No qualifying positions this quarter.

Portfolio Positions

Compact Export CSV View 13F filing

14 tracked positions · $1,340,190,986 total · filing declares 14 positions · $1,340,190,988 · as of Mar 31, 2026

All sectors Communication Services Healthcare Industrials Technology

Ticker	Company	Type	Shares	Δ Shares	Value (USD)	% Δ Value	% of Portfolio
LRCX	Lam Research Corp Technology	Reduced	2,249,394	-141,390	$480,605,522	+17.4%	35.86%
KLAC	Kla Corp Technology	Held	310,738	0	$457,533,738	+21.2%	34.14%
ADI	Analog Devices Inc Technology	Held	466,196	0	$148,315,595	+17.3%	11.07%
AVGO	Broadcom Inc. Technology	Held	362,760	0	$112,277,847	−10.6%	8.38%
BMY	Bristol Myers Squibb Co Healthcare	Held	479,991	0	$29,111,454	+12.4%	2.17%
DELL	Dell Technologies Inc. Technology	Held	130,619	0	$21,438,496	+30.4%	1.60%
EGAN	EGAIN Corp Technology	Held	2,671,843	0	$21,080,841	−23.3%	1.57%
ASPN	Aspen Aerogels Inc Industrials	Added	5,168,674	+774,149	$17,676,865	+42.1%	1.32%
PINS	Pinterest, Inc. Communication Services	Added	850,000	+200,000	$15,589,000	−7.4%	1.16%
PRGS	Progress Software Corp /Ma Technology	Held	508,608	0	$13,045,795	−40.3%	0.97%
GRMN	Garmin Ltd Technology	Held	48,000	0	$11,136,480	+14.4%	0.83%
CEVA	Ceva Inc Technology	Held	446,377	0	$8,338,322	−13.2%	0.62%
ARM	Arm Holdings PLC /Uk Technology	NEW	20,000	NEW	$3,025,600	NEW	0.23%
INTC	Intel Corp Technology	Held	23,010	0	$1,015,431	+19.6%	0.08%

Covers the securities this platform tracks: U.S.-listed common stock and the put/call positions reported on it. A 13F can also report security types outside that coverage — preferred shares, bonds, warrants, untracked share classes — so the filing's own declared total can exceed the figures above. The source filing is linked at the top of this table.