OBERWEIS ASSET MANAGEMENT INC/

CIK 0000937886 · Q2 2026

13F Equity AUM

$4.8B

+42.9% QoQ

Positions

175

-4 QoQ

AUM Rank

#866

Top 10%

Skill Alpha (FF)

+3.3%/yr^ns

No Clear Edge

Rank #985 · Top 12%

vs S&P +4.8%/yr (unadj.)

Quarters Tracked

~13 years

Portfolio Concentration

Top 5: 18.3%Top 10: 26.6%Top 20: 38.4%

CRDO5.7%

AAOI5.5%

DOCN3.0%

SIMO2.2%

UCTT1.9%

SN1.9%

SITM1.8%

BTSG1.7%

HNGE1.5%

RMBS*1.4%

Others (165)73.4%

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

Sector Allocation

Technology42.3%

Industrials18.1%

Healthcare17.2%

Consumer Cyclical10.7%

Financial Services4.5%

Energy3.2%

Other3.9%

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

Position Sizing

Positions: 175Median: 0.42%Avg: 0.57%

0–0.5%

103(24.1%)

0.5–1%

51(36.6%)

1–3%

18(25.2%)

3–5%

1(3.0%)

5%+

2(11.2%)

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

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Portfolio Overlap

Shared: 0Unique: 175vs 20 funds

0%Low

175

Fund positions

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.

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Position Changes This Quarter

New23Increased113Decreased27Exited27

New Positions

MXL0.8%

+320K

1GSN0.8%

+244K

BLLN0.7%

+299K

PAHUSD0.7%

+740K

OUST0.7%

+546K

CGNX0.6%

+428K

GVA0.6%

+193K

PDFS0.6%

+426K

MYRG0.6%

+54K

KGS0.6%

+356K

Increased

NVST0.6%

+455K(+68%)

ADPT0.6%

+452K(+56%)

WAY0.7%

+422K(+36%)

HNGE1.5%

+390K(+84%)

CHYM0.5%

+233K(+22%)

CECO0.7%

+223K(+165%)

VISN0.3%

+207K(+19%)

VIAV0.8%

+200K(+34%)

RSI1.0%

+193K(+13%)

LEVI0.7%

+191K(+16%)

Decreased

AAOI5.5%

-558,842(-24%)

CPRX0.2%

-486,900(-62%)

4DH0.7%

-293,200(-18%)

IMA0.3%

-250,600(-43%)

FSLY0.3%

-218,700(-20%)

LITE1.3%

-194,037(-73%)

MD0.3%

-78,000(-11%)

COCO0.1%

-72,500(-46%)

TPC0.6%

-70,700(-18%)

ZETA0.3%

-51,290(-6%)

Exited

FLS

-434,681

PRIM

-166,100

-606,832

-797,780

-1,908,293

-455,290

-1,044,900

-261,370

-187,570

-744,267

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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