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Latest OBERWEIS ASSET MANAGEMENT INC/ Stock Portfolio

$4.84Billion | No. of Holdings #175

OBERWEIS ASSET MANAGEMENT INC/ Performance

2026 Q2+30.39%
YTD+40.34%
2025+19.34%

About OBERWEIS ASSET MANAGEMENT INC/ and 13F Hedge Fund Stock Holdings

OBERWEIS ASSET MANAGEMENT INC/ is a hedge fund based in Lisle, IL. On 2026-08-14, the fund reported it's updated stock portfolio. In the 13F Holdings report, OBERWEIS ASSET MANAGEMENT INC/ reported an equity portfolio of $4.8 Billions as of 30 Jun, 2026. <br><br> The top stock holdings of OBERWEIS ASSET MANAGEMENT INC/ are CRDO, AAOI, DOCN. The fund has invested 5.7% of it's portfolio in CREDO TECHNOLOGY GROUP and 5.5% of portfolio in APPLIED OPTOELECTRONICS INC. <br><br> The fund managers got completely rid off FLOWSERVE CORPORATION (FLS), PRIMORIS SERVICES CORP. (PRIM) and GENPACT LTD. (G) stocks. They significantly reduced their stock positions in LUMENTUM HLDGS, INC. (LITE), H WORLD GROUP LTD. (HTHT) and CATALYST PHARMACEUTICALS, INC. (CPRX). OBERWEIS ASSET MANAGEMENT INC/ opened new stock positions in MAXLINEAR, INC. CLASS A (MXL), NOVANTA, INC. (NOVT) and BILLIONTOONE, INC.. The fund showed a lot of confidence in some stocks as they added substantially to CECO ENVIRONMENTAL CORP. (CECE), VSE CORP. (VSEC) and MOOG INC. - A.
OBERWEIS ASSET MANAGEMENT INC/ Equity Portfolio Value
Last Reported on: 14 Aug, 2026
$4.84Billion
  as of Aug 14, 2026

OBERWEIS ASSET MANAGEMENT INC/ Annual Return Estimates Vs S&P 500

Our best estimate is that OBERWEIS ASSET MANAGEMENT INC/ made a return of 30.39% in the last quarter. In trailing 12 months, it's portfolio return was 60.46%.
  • Performance
  • S&P 500

New Buys

Ticker$ Bought
maxlinear, inc. class a40,905,600
novanta, inc.39,628,700
billiontoone, inc.35,877,600
element solutions, inc.35,339,800
ouster, inc.34,124,000
cognex corp.30,982,700
granite construction30,523,700
pdf solutions, inc.30,184,900
New stocks bought by OBERWEIS ASSET MANAGEMENT INC/

Additions

Ticker% Inc.
ceco environmental corp.165
vse corp.153
moog inc. - a93.13
diodes, inc.84.46
hinge health, inc.83.67
powell industries inc.75.19
envista holdings corp.68.44
adaptive biotechnologies55.99
Additions to existing portfolio by OBERWEIS ASSET MANAGEMENT INC/

Reductions

Ticker% Reduced
lumentum hldgs, inc.-72.89
h world group ltd.-66.67
catalyst pharmaceuticals, inc.-62.38
the vita coco co., inc.-46.44
imax corp.-43.42
argan, inc-36.62
applied optoelectronics inc.-23.78
nova ltd.-21.22
OBERWEIS ASSET MANAGEMENT INC/ reduced stake in above stock

Sold off

Ticker$ Sold
alphatec hldgs inc.-20,762,200
american eagle outfitters-17,449,800
coursera, inc.-4,782,880
national vision holdings, inc.-20,662,500
mirion technologies, inc.-13,835,900
genpact ltd.-22,604,500
pegasystems inc.-19,377,200
expro group holdings n.v.-7,914,590
OBERWEIS ASSET MANAGEMENT INC/ got rid off the above stocks

Sector Distribution

OBERWEIS ASSET MANAGEMENT INC/ has about 37.4% of it's holdings in Technology sector.

  • Technology
  • Others
  • Industrials
  • Healthcare
  • Consumer Cyclical
  • Financial Services
  • Energy
  • Communication Services
Sector%
Technology37.4
Others17.2
Industrials15.6
Healthcare12.2
Consumer Cyclical8.8
Financial Services3.4
Energy2
Communication Services1.2

Market Cap. Distribution

OBERWEIS ASSET MANAGEMENT INC/ has about 22.3% of it's portfolio invested in the large-cap and mega-cap stocks.

  • MID-CAP
  • LARGE-CAP
  • UNALLOCATED
  • SMALL-CAP
Category%
MID-CAP51.7
LARGE-CAP22.3
UNALLOCATED17.2
SMALL-CAP7.7

Stocks belong to which Index?

About 61.1% of the stocks held by OBERWEIS ASSET MANAGEMENT INC/ either belong to S&P 500 or RUSSELL 2000 index.

  • RUSSELL 2000
  • Others
Index%
RUSSELL 200061.1
Others38
Top 5 Winners (%)%
MU
micron technology
241.7 %
ACMR
acm research, inc. class a
222.5 %
CRDO
credo technology group
188.9 %
SIMO
silicon motion techn adr
168.6 %
UCTT
ultra clean holdings
127.8 %
Top 5 Winners ($)$
CRDO
credo technology group
181.2 M
AAOI
applied optoelectronics inc.
131.6 M
SIMO
silicon motion techn adr
66.2 M
DOCN
digitalocean holdings, inc.
66.2 M
UCTT
ultra clean holdings
51.8 M
Top 5 Losers (%)%
PAHC
phibro animal health corp
-41.9 %
FSLY
fastly, inc.
-33.1 %
COMM
vistance networks, inc.
-28.1 %
core natural resources, inc.
-23.6 %
CALX
calix, inc.
-22.3 %
Top 5 Losers ($)$
FSLY
fastly, inc.
-10.3 M
DAN
dana inc.
-9.4 M
PAHC
phibro animal health corp
-7.0 M
core natural resources, inc.
-6.7 M
COMM
vistance networks, inc.
-6.5 M

OBERWEIS ASSET MANAGEMENT INC/ Holdings Map

This heatmap illustrates the top 50 positions within the fund's portfolio.

Current Stock Holdings of OBERWEIS ASSET MANAGEMENT INC/

OBERWEIS ASSET MANAGEMENT INC/ has 175 stocks in it's portfolio. About 26.6% of the portfolio is in top 10 stocks. FSLY proved to be the most loss making stock for the portfolio. CRDO was the most profitable stock for OBERWEIS ASSET MANAGEMENT INC/ last quarter.

$4.84BTotal Value
203Positions
14 Aug, 2026Last Reported
Current holdings of Current Stock Holdings of OBERWEIS ASSET MANAGEMENT INC/, last reported on 14 Aug, 2026. Select a row with a linked ticker to view its historical trend.
ExpandHoldingsorted ascending% PortfolioShares Held$ Value% Change