DOSSIER · 13F-HR · Q1 2026

OAKTOP CAPITAL MANAGEMENT II, L.P.

$1.3B in tracked AUM across 14 positions as of Q1 2026.

OC
CIK 0001550660 · last filed Mar 31, 2026
Total AUM
$1.3B
as of Q1 2026
Holdings
14
positions
Whale Score
77
77
strong
Activity
no data
changes this Q
AI Analysis · Q1 2026

Oaktop Capital Management II's $1.78B Q1 2026 13F is a concentrated active book showing a net-accumulation posture. The portfolio — refilling from a $1.23B prior quarter with 12 positions increased, 1 reduced, no exits, and no new entries — is one of the more asymmetric buy-heavy quarters in the current queue. The WhaleScore of 79 reflects a long-term record built on concentrated security selection, and this filing reinforces that characterization: the manager is adding across the book rather than rotating, which is a confidence signal in the existing idea set.

The activity breakdown — 12 increases, 1 decrease, 0 sold-out, 0 new entries — is among the most asymmetric in the current authoring queue. In a concentrated book, that pattern is a strong conviction read: the manager found almost nothing to trim and a great deal to add to. The single reduced position is the one name the manager remains least confident in; everything else was deemed worth deepening.

The absence of new positions is notable. In many active managers' filings, new research deployment shows up as fresh entries. Oaktop's Q1 instead suggests the research perimeter is already mapped and the portfolio is in 'prove it out' mode — sizing up existing favorites rather than expanding the mandate's scope.

Quarter at a glance — Q1 2026

Position-change comparison pending.

No quarter-over-quarter changes available.

Top 10 holdings

By portfolio weight as of Q1 2026.

#HoldingValueSharesWeight
01
LRCX
LAM RESEARCH CORP
$481M2.2M35.9%
02
KLAC
KLA CORP
$458M311K34.1%
03
ADI
ANALOG DEVICES INC
$148M466K11.1%
04
AVGO
BROADCOM INC
$112M363K8.4%
05
BMY
BRISTOL-MYERS SQUIBB CO
$29M480K2.2%
06
DELL
DELL TECHNOLOGIES INC
$21M131K1.6%
07
EGAN
EGAIN CORP
$21M2.7M1.6%
08
ASPN
ASPEN AEROGELS INC
$18M5.2M1.3%
09
PINS
PINTEREST INC
$16M850K1.2%
10
PRGS
PROGRESS SOFTWARE CORP
$13M509K1.0%

Filing history

2026Q1Mar 31
$1.3B 13.6%
14 positionsView →
2025Q4Dec 31
$1.2B 6.7%
13 positionsView →
2025Q3Sep 30
$1.1B 18.9%
15 positionsView →
2025Q2Jun 30
$930M 23.8%
15 positionsLocked
2025Q1Mar 31
$751M 6.2%
15 positionsLocked
2024Q4Dec 31
$801M 12.6%
15 positionsLocked
2024Q3Sep 30
$916M 6.2%
15 positionsLocked
2024Q2Jun 30
$976M 12.8%
16 positionsLocked
2024Q1Mar 31
$865M 14.7%
15 positionsLocked
2023Q4Dec 31
$754M 25.9%
14 positionsLocked
2023Q3Sep 30
$599M 8.9%
14 positionsLocked
2023Q2Jun 30
$658M 10.6%
15 positionsLocked
Showing 12 of 50