Data as of Q4 2025 (Dec 31, 2025)

OBERWEIS ASSET MANAGEMENT INC/

•CIK: 937886•Filing: Q4 2025

**OBERWEIS ASSET MANAGEMENT INC/** manages $2.7B across a diversified portfolio of 178 positions. The fund exhibits significant concentration in select names, notably maintaining substantial exposure to LITE at $103.5M and PNC at $97.2M. Further top holdings include AAOI ($71.1M) and SF-PD ($58.9M), suggesting targeted, high-conviction allocations across various sectors. This structure indicates a disciplined, bottom-up approach with notable overweighting in specific market segments.

Total AUM
$2.7B
QoQ Performance
+4.7%
Positions
178
Top 10 Concentration
20.8%
Latest Filing
Q4 2025

Top Holdings Allocation

LITE3.8%
CRDO3.6%
AAOI2.6%
SN2.2%
AMBA1.6%
RMBS*1.6%
SKYW1.4%
EHC1.4%

📈 Biggest Buys

GMED
Globus Medical, Inc.-A
NEW
0.9% of portfolio
ARQT
Arcutis Biotherapeutics, Inc.
NEW
0.9% of portfolio
4DH
Dana Inc.
NEW
0.7% of portfolio
CNR
Core Natural Resources, Inc.
NEW
0.6% of portfolio
INDV
Indivior Plc
NEW
0.6% of portfolio

📉 Biggest Sells

LITE
Lumentum Hldgs, Inc.
-14.5%
3.8% of portfolio
FN
Fabrinet
-45.1%
0.4% of portfolio
AGX
Argan, Inc
-45.6%
0.4% of portfolio
AEIS
Advanced Energy Industry, Inc.
-43.0%
0.3% of portfolio
RMBS*
Rambus, Inc
-9.0%
1.6% of portfolio

Sector Breakdown

Other99.7%
Technology0.1%
ETF0.1%
Financial0.0%
Healthcare0.0%
Consumer0.0%
Industrial0.0%

🚪 Exited Positionssold since Q3 2025

ADMA
ADMA Biologics, Inc.
SOLD
$39.8M
SRAD
Sportradar Group
SOLD
$37.1M
ITRI
Itron Inc
SOLD
$35.4M
LRN
Stride, Inc.
SOLD
$27.1M
QRVO
Qorvo, Inc.
SOLD
$23.8M
+20 more exited positions

Changes from Q3 2025

NEW21 new positions
↑104 increased
↓20 decreased

Historical Filings

Q4 2025Q3 2025Q2 2025Q1 2025Q4 2024Q3 2024Q2 2024Q1 2024Q4 2023

📌 Top Holdings

LITE3.8%
Lumentum Hldgs, Inc.
$103.5M
CRDO3.6%
Credo Technology Group
$97.2M
AAOI2.6%
Applied Optoelectronics Inc.
$71.1M
SN2.2%
SharkNinja, Inc.
$58.9M
AMBA1.6%
Ambarella, Inc.
$43.8M

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