OBERWEIS ASSET MANAGEMENT INC/

CIK 0000937886 · Q1 2026

13F Equity AUM

$3.4B

+23.8% QoQ

Positions

179

+1 QoQ

AUM Rank

#1,287

Top 10%

Skill Alpha (FF)

+1.7%/yr^ns

No Clear Edge

Rank #1,253 · Top 15%

vs S&P +1.9%/yr (unadj.)

Quarters Tracked

~13 years

Portfolio Concentration

Top 5: 18.5%Top 10: 26.0%Top 20: 37.1%

AAOI5.9%

LITE5.5%

CRDO2.8%

DOCN2.4%

SN1.9%

NVMI1.8%

4DH1.6%

BTSG1.5%

MTSI1.4%

RMBS*1.3%

Others (169)74.0%

HHI (Herfindahl-Hirschman Index) measures portfolio concentration. Low (<1500) = diversified, Moderate (1500-2500), High (>2500) = concentrated bets.

Sector Allocation

Technology40.1%

Industrials18.7%

Healthcare16.8%

Consumer Cyclical11.3%

Financial Services4.6%

Energy3.9%

Other4.6%

Portfolio weight by GICS sector based on latest 13F filing. Sectors below 2% are grouped as “Other.”

Position Sizing

Positions: 179Median: 0.45%Avg: 0.56%

0–0.5%

104(24.2%)

0.5–1%

57(40.7%)

1–3%

16(23.7%)

3–5%

0(0.0%)

5%+

2(11.4%)

Count of positions per weight bucket — (%) = combined portfolio weight

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Portfolio Overlap

Shared: 176Unique: 3vs 20 funds

2.4%Low

179

Fund positions

7,299

Consensus CUSIPs

Jaccard similarity of this fund’s portfolio vs the consensus of top 20 funds by AUM. Low (<15%) = contrarian, Moderate (15-40%), High (>40%) = follows the crowd.

Most Similar Funds

Top 9 benchmark funds with highest portfolio overlap (Jaccard similarity)

MORGAN STANLEY

3.4%

BlackRock, Inc.

4.4%

STATE STREET CORP

5.1%

GEODE CAPITAL MANAGEMENT, LLC

BANK OF AMERICA CORP /DE/

3.7%

JPMORGAN CHASE & CO

3.5%

VANGUARD CAPITAL MANAGEMENT LLC

4.9%

VANGUARD PORTFOLIO MANAGEMENT LLC

5.9%

FMR LLC

5.4%

Jaccard similarity per fund: shared CUSIPs / (fund A + fund B − shared). Higher values indicate more similar portfolios.

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Position Changes This Quarter

New22Increased129Decreased19Exited21

New Positions

DRS0.6%

+450K

INDV0.6%

+653K

CHYM0.6%

+1.0M

HNGE0.5%

+466K

NVST0.5%

+665K

SHAK0.5%

+188K

ARLO0.4%

+982K

MOG/A0.4%

+45K

SBG10.3%

+379K

ATEN0.3%

+504K

Increased

ATEC0.6%

+908K(+91%)

4DH1.6%

+815K(+102%)

EVLV0.3%

+594K(+55%)

ARQT0.9%

+558K(+69%)

RELY0.7%

+452K(+45%)

CRMD0.2%

+406K(+50%)

FSLY0.9%

+381K(+55%)

CRDO2.8%

+347K(+51%)

WAY0.8%

+327K(+39%)

AAOI5.9%

+310K(+15%)

Decreased

FRSH0.0%

-1,996,720(-97%)

WEAV0.0%

-926,250(-93%)

AMBA0.5%

-322,675(-52%)

IBEX Ltd.0.0%

-231,600(-96%)

LINC0.2%

-120,653(-39%)

NYT0.5%

-91,050(-30%)

COCO0.2%

-77,292(-33%)

IMA0.7%

-75,161(-12%)

EHC0.8%

-69,486(-19%)

AIR0.8%

-27,575(-10%)

Exited

-518,400

-188,000

-1,585,900

-330,702

Indivior Plc

-424,941

CVLT

-110,900

TPB

-103,500

-127,500

GDOT

-765,000

ATRC

-217,992

Quarter-over-quarter changes compared to prior 13F filing. New = first appearance; Exited = no longer held.

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Holdings

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