OA

Oberweis Asset Management Inc/

Diversified strategyMomentum followerSector-focused

Total reported value

$3.4B

Reporting period: 2026-03-31 · Number of holdings: 180

OBERWEIS ASSET MANAGEMENT INC/ disclosed 180 holdings in its latest 13F filing for the period ending 2026-03-31, with total reported value of $3.4B and a quarterly turnover rate of 45.2%.

Personality snowflake

Concentration
5.72
Portfolio Stability
45.18
Momentum/Contrarian
100
Sector conviction
94.82
Diversification
100
Sizing Uniformity
87.42

Recent moves

  • Add AAOI

    +15.2%　$127.7M

  • Add LITE

    -5.2%　$83.5M

  • Trim AMBA

    -52.2%　-$28.6M

  • Add DOCN

    +19.1%　$42.1M

  • Add DAN

    +102.3%　$35.3M

  • Trim FRSH

    -97.2%　-$24.7M

Holdings Map

New buyAddUnchangedTrim

Top 10 holdings by weight

Full holdings list this quarter

#TickerIssuerAsset SubclassWeightWeight ChangeShares Change4Q Trend
1AAOIApplied Optoelectronics INCStock-Tech5.87%+3.27%+15.21%
2LITELumentum Holdings INCStock-Tech5.53%+1.74%-5.24%
3CRDOCredo Technology Group Holding LtdStock-Tech2.83%—+51.32%
4DOCNDigitalocean Holdings INCStock-Tech2.35%+0.98%+19.09%
5SNSharkNinja, Inc.Stock-Consumer Disc1.88%—+14.00%
6NVMINova Ltd.Stock-Other1.77%+0.41%+21.78%
7DANDana INCStock-Other1.60%+0.91%+102.32%
8BTSGBrightspring Health ServicesStock-Other1.46%+0.22%+27.64%
9MTSIMacom Technology Solutions HStock-Tech1.42%+0.30%+20.63%
10RMBSRambus INCStock-Tech1.34%—+13.90%
11CLHClean Harbors INCStock-Industrials1.22%+0.22%+23.52%
12SITMSitime CORPStock-Tech1.22%—+12.11%
13UCTTUltra Clean Holdings INCStock-Other1.18%+0.60%+1.91%
14ECGEverus Construction GroupStock-Industrials1.14%+0.33%+25.69%
15FTDRFrontdoor INCStock-Consumer Disc1.12%—+17.53%
16CRSCarpenter TechnologyStock-Industrials1.10%+0.15%+14.31%
17SKYWSkywest INCStock-Industrials1.06%—+2.69%
18LSCCLattice Semiconductor CORPStock-Tech1.03%+0.18%+19.01%
19GMEDGlobus Medical INC - AStock-Healthcare1.00%+0.14%+45.26%
20CAMTCamtek Ltd.Stock-Other1.00%+0.15%+1.78%
21ARQTArcutis Biotherapeutics INCStock-Other0.95%+0.09%+68.97%
22FLSFlowserve CORPStock-Industrials0.94%—+6.04%
23SIMOSilicon Motion Technol-adrStock-Other0.94%+0.14%+19.57%
24LTHLife Time Group Holdings INCStock-Other0.92%—+9.55%
25RSIRush Street Interactive INCStock-Other0.92%—+1.62%
26FCFSFirstcash Holdings INCStock-Financials0.92%+0.15%+26.17%
27FSLYFastly INC - Class AStock-Tech0.92%+0.66%+55.27%
28TPCTutor Perini CORPStock-Other0.90%—+1.73%
29BROSDutch Bros Inc-class AStock-Consumer Disc0.90%—+47.96%
30SEISolaris Energy InfrastructurStock-Energy0.89%+0.27%+44.97%
31MMSIMerit Medical Systems INCStock-Healthcare0.86%—+57.84%
32FSSFederal Signal CORPStock-Industrials0.85%+0.19%+60.74%
33AMSCAmerican Superconductor CORPStock-Other0.85%—+1.67%
34MRCYMercury Systems INCStock-Industrials0.84%—-5.56%
35ACAArcosa INCStock-Industrials0.84%—+20.80%
36OSISOsi Systems INCStock-Tech0.84%—+5.12%
37CNRCore Natural Resources INCStock-Energy0.83%+0.25%+51.23%
38WAYWaystar Holding CORPStock-Other0.83%—+38.89%
39EHCEncompass Health CORPStock-Healthcare0.83%-0.56%-19.36%
40VCYTVeracyte INCStock-Other0.80%—+15.56%
41AIRAar CORPStock-Industrials0.79%—-10.11%
42ICUIIcu Medical INCStock-Other0.78%—+21.23%
43LFUSLittelfuse INCStock-Tech0.72%—+15.25%
44PRIMPrimoris Services CORPStock-Industrials0.70%—+1.71%
45RELYRemitly Global INCStock-Other0.67%+0.16%+45.02%
46GGenpact LimitedStock-Tech0.67%—+16.34%
47AIZAssurant INCStock-Financials0.66%—+23.25%
48BLBDBlue Bird CORPStock-Other0.65%—+1.72%
49IMAXImax CORPStock-Other0.65%—-11.52%
50LEVILevi Strauss & Co- Class AStock-Other0.64%—+17.45%
1–50 of 180

Holding changes this quarter

Oberweis Asset Management Inc/'s most significant position changes for 2026-03-31: New buy: Leonardo Drs INC (DRS); New buy: Indivior Pharmaceuticals INC (INDV); Sold out: Cargurus INC (CARG); New buy: Chime Financial Inc-cl A (CHYM); New buy: Hinge Health Inc-a (HNGE).

Position changes disclosed by Oberweis Asset Management Inc/ for the quarter ending 2026-03-31, including ticker, issuer, weight change, shares change, and action
#TickerIssuerWeight ChangeShares ChangeAction
1AAOIApplied Optoelectronics INC+3.3%+15.21%Add
2LITELumentum Holdings INC+1.7%-5.24%Trim
3DOCNDigitalocean Holdings INC+1%+19.09%Add
4DANDana INC+0.9%+102.32%Add
5FSLYFastly INC - Class A+0.7%+55.27%Add
6UCTTUltra Clean Holdings INC+0.6%+1.91%Add
7NVMINova Ltd.+0.4%+21.78%Add
8ECGEverus Construction Group+0.3%+25.69%Add
9MTSIMacom Technology Solutions H+0.3%+20.63%Add
10SEISolaris Energy Infrastructur+0.3%+44.97%Add
11CNRCore Natural Resources INC+0.3%+51.23%Add
12VIAVViavi Solutions INC+0.3%+16.75%Add
13BTSGBrightspring Health Services+0.2%+27.64%Add
14CLHClean Harbors INC+0.2%+23.52%Add
15FSSFederal Signal CORP+0.2%+60.74%Add
16MTDRMatador Resources Co+0.2%+23.16%Add
17ABCBAmeris Bancorp+0.2%+68.48%Add
18LSCCLattice Semiconductor CORP+0.2%+19.01%Add
19RELYRemitly Global INC+0.2%+45.02%Add
20CRSCarpenter Technology+0.2%+14.31%Add
21CAMTCamtek Ltd.+0.2%+1.78%Add
22FCFSFirstcash Holdings INC+0.2%+26.17%Add
23GMEDGlobus Medical INC - A+0.1%+45.26%Add
24SIMOSilicon Motion Technol-adr+0.1%+19.57%Add
25ARQTArcutis Biotherapeutics INC+0.1%+68.97%Add
26✓ IBEX Ltd.-0.3%-95.78%Trim
27WGSGenedx Holdings CORP-0.5%+31.49%Add
28EHCEncompass Health CORP-0.6%-19.36%Trim
29FRSHFreshworks Inc-cl A-0.9%-97.19%Trim
30AMBAAmbarella, Inc.-1.2%-52.22%Trim
31DRSLeonardo Drs INC—NEWNew buy
32INDVIndivior Pharmaceuticals INC—NEWNew buy
33CARGCargurus INC—EXITSold out
34CHYMChime Financial Inc-cl A—NEWNew buy
35HNGEHinge Health Inc-a—NEWNew buy
36SXTSensient Technologies CORP—EXITSold out
37GENIGenius Sports Limited—EXITSold out
38NVSTEnvista Holdings CORP—NEWNew buy
39SHAKShake Shack INC - Class A—NEWNew buy
40ACIWAci Worldwide INC—EXITSold out
41INDVIndivior Pharmaceuticals, Inc.—EXITSold out
42ARLOArlo Technologies INC—NEWNew buy
43CVLTCommvault Systems INC—EXITSold out
44MOG-AMoog Inc-class A—NEWNew buy
45ATENA10 Networks INC—NEWNew buy
46SBCFSeacoast Banking Corp/fl—NEWNew buy
47TPBTurning Point Brands INC—EXITSold out
48WKWorkiva INC—EXITSold out
49AMPXAmprius Technologies INC—NEWNew buy
50GDOTGreen Dot Corp-class A—EXITSold out

FAQ

What is Oberweis Asset Management Inc/ and what type of investor is it?
Oberweis Asset Management Inc/ is a investment manager that files SEC Form 13F quarterly, disclosing its U.S. public equity holdings to regulators. As of the most recent reporting period (2026-03-31), the firm manages a tracked equity portfolio valued at approximately $3.4B, spread across 180 disclosed positions.
What are Oberweis Asset Management Inc/'s largest equity positions?
Based on the latest 13F filing, Oberweis Asset Management Inc/'s top holdings by market value are: 1. Applied Optoelectronics INC (AAOI) — $198.8M (5.9%) 2. Lumentum Holdings INC (LITE) — $187.1M (5.5%) 3. Credo Technology Group Holding Ltd (CRDO) — $95.9M (2.8%) 4. Digitalocean Holdings INC (DOCN) — $79.6M (2.4%) 5. SharkNinja, Inc. (SN) — $63.5M (1.9%)
What changes did Oberweis Asset Management Inc/ make in its most recent portfolio filing?
In the latest reported quarter, Oberweis Asset Management Inc/ made 50 notable position adjustments: 11 new positions were initiated, 25 existing holdings were added to, 5 positions were partially reduced, and 9 were completely exited. The largest of these moves: New buy: Leonardo Drs INC (DRS); New buy: Indivior Pharmaceuticals INC (INDV); Sold out: Cargurus INC (CARG); New buy: Chime Financial Inc-cl A (CHYM); New buy: Hinge Health Inc-a (HNGE)
What sectors does Oberweis Asset Management Inc/ focus on?
Oberweis Asset Management Inc/ is concentrated in the following sectors based on its current disclosed equity portfolio: • Information Technology: 49.9% • Industrials: 21.6% • Consumer Discretionary: 9.9% • Health Care: 8.5% • Energy: 4.5% • Financials: 3.7%