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Oberweis Asset Management Inc/

CIK:0000937886
Asset Manager
$6M AUM
184 holdings
Lisle, IL, United States
Founded:1989
45 employees
Latest filing:Jun 30, 2025

Oberweis Asset Management, Inc. is a privately held investment adviser headquartered in Lisle, Illinois. Founded in 1989, the firm specializes in managing equity portfolios for a mix of mutual funds and institutional separate accounts, serving both retail and institutional investors. OAM is known for its expertise in identifying market inefficiencies in equities globally, focusing on rigorous qualitative and quantitative research. The firm emphasizes team-based investment management and has a stable organization with investment professionals averaging at least 18 years of industry experience.

Investment Strategy

Oberweis Asset Management’s investment strategy revolves around identifying rapidly growing smaller and medium-sized companies that may offer greater return potential. The firm seeks out stocks in pockets of market inefficiency globally, leveraging a seasoned team to evaluate signals and catalysts for growth. They employ both qualitative and quantitative analysis to assess businesses, aiming to capture appreciation in companies with strong and durable business plans. The funds managed by Oberweis invest internationally and in US markets, often via separately managed accounts (SMAs) and mutual funds, with particular focus on growth and change catalysts.

Top Buys
A
AAOIApplied Optoelectronics Inc.
+$27.2M
L
LITELumentum Hldgs, Inc.
+$25.6M
C
CRDOCredo Technology Group
+$19.6M
B
BTSGBrightSpring Health Services
+$18.3M
Q
QRVOQorvo, Inc.
+$17.0M
Top Sells
D
DOCSDoximity, Inc.
-$33.9M
D
DORMDorman Products, Inc.
-$25.1M
D
DECKDeckers Outdoor Corp.
-$19.0M
C
CCSCentury Communities, Inc.
-$16.6M
Y
YOUClear Secure, Inc.
-$15.8M

Top Holdings

C
CRDOCredo Technology Group
+3.1%$70.2M
A
ADMAADMA Biologics, Inc.
+2.5%$57.1M
A
AAOIApplied Optoelectronics Inc.
+2.1%$48.5M
S
SNSharkNinja, Inc.
+2.1%$48.0M
E
EHCEncompass Health Corporation
+1.9%$44.0M

Equity Positions (180)

TickerSecurityWeightMarket ValueSharesAvg CostPriceChange (QoQ)
C
CRDO
Credo Technology Group3.06%$70.2M758,568$34.54$92.59+$19.6M
A
ADMA
ADMA Biologics, Inc.2.48%$57.1M3,135,890$10.04$18.21-$10.9M
A
AAOI
Applied Optoelectronics Inc.2.11%$48.5M1,888,041$17.96$25.69+$27.2M
S
SN
SharkNinja, Inc.2.09%$48.0M484,560$75.65$98.99+$6.2M
E
EHC
Encompass Health Corporation1.92%$44.0M359,025$80.33$122.63+$6.5M

Industry Allocation

SEMICONDUCTORS & RELATED DEVICES
+14.0%
SERVICES-PREPACKAGED SOFTWARE
+8.5%
BIOLOGICAL PRODUCTS, (NO DIAGNOSTIC SUBSTANCES)
+3.2%
SURGICAL & MEDICAL INSTRUMENTS & APPARATUS
+3.1%
SERVICES-COMPUTER PROGRAMMING, DATA PROCESSING, ETC.
+3.0%