Listed

OBERWEIS ASSET MANAGEMENT INC/

An institutional investment manager in LISLE, IL. Its Form 13F for the quarter ended Jun 30, 2026, filed Aug 14, 2026. SEC CIK 937886.

Share

Share this page

Story card, 1080 × 1920

Holdings: 176 positions

The filing on sec.gov

As filed, largest first. Reported value is what the manager stated for each position at the quarter end, in US dollars; it is filing data, not a price. Weight is the position's share of the total reported value. Changes compare with the 13F for the quarter ended 2026-03-31.

IssuerClassCUSIPReported value$mWeightSharesPut or callChange on the quarter before
Credo Technology GroupCOMG254571052765.7%1,013,428Reduced−8,540
Applied Optoelectronics Inc.AAOICOM03823U1022655.5%1,791,127Reduced−558,842
DigitalOcean Holdings, Inc.DOCNCOM25402D1021463.0%930,005Added+2,500
Silicon Motion Techn ADRSIMOCOM82706C1081052.2%316,350Added+33,800
Ultra Clean HoldingsUCTTCOM90385V10792.31.9%647,276Added+6,800
SharkNinja, Inc.COMG8068L10890.41.9%593,500Reduced−6,470
SiTime CorporationSITMCOM82982T10689.11.8%119,501Added+220
BrightSpring Health ServicesBTSGCOM10950A10682.71.7%1,185,280Added+26,310
Hinge Health, Inc.HNGECOM43331310371.01.5%855,476Added+389,710
Rambus, IncRMBSCOM75091710670.01.4%527,016Added+700
Macom Technology SolutionsMTSICOM55405Y10068.21.4%179,356Reduced−36,530
Lumentum Hldgs, Inc.LITECOM55024U10961.91.3%72,185Reduced−194,037
Lattice Semiconductor CorporatLSCCCOM51841510459.91.2%391,816Added+17,380
Nova Ltd.COMM7516K10359.01.2%108,675Reduced−29,280
Carpenter Technology Corp.CRSCOM14428510357.51.2%93,273Reduced−1,160
Frontdoor, Inc.FTDRCOM35905A10955.81.2%719,060Added+1,100
Everus Construction GroupECGCOM30042610354.51.1%328,183Added+1,650
Veracyte, Inc.VCYTCOM92337F10751.51.1%877,734Added+37,900
Powell Industries Inc.POWLCOM73912810651.41.1%179,521Added+145,364
Life Time Holdings, Inc.LTHCOM53190C10248.61.0%1,189,620Added+29,120
Rush Street Interactive, Inc.RSICOM78201110048.41.0%1,627,930Added+193,370
Mercury Systems, Inc.MRCYCOM58937810848.01.0%392,723Added+1,700
Dutch Bros., Inc.BROSCOM26701L10047.11.0%656,093Added+57,600
Clean Harbors, Inc.CLHCOM18449610745.90.9%153,475Added+9,120
Solaris Energy InfrastructurSEICOM83418M10345.40.9%564,581Added+32,692
Diodes, Inc.DIODCOM25454310145.30.9%413,750Added+189,450
Arcosa, Inc.ACACOM03965310042.90.9%295,450Added+27,750
Blue Bird CorporationBLBDCOM09530610641.80.9%529,838Added+140,600
Camtek, Ltd.COMM2079110541.30.9%253,380Added+30,600
LivaNova PlcCOMG5509L10141.10.8%500,150Added+178,250
American SuperconductorAMSCCOM03011120741.00.8%987,500Added+137,600
Maxlinear, Inc. Class AMXLCOM57776J10040.90.8%319,500New+319,500
Globus Medical, Inc.-AGMEDCOM37957720840.50.8%512,100Added+119,900
Novanta, Inc.NOVTCOM67000B10439.60.8%244,260New+244,260
Skywest IncSKYWCOM83087910238.10.8%383,799Reduced−8,700
Viavi Solutions, Inc.VIAVCOM92555010537.90.8%793,600Added+200,400
Moog Inc. - AMOG-ACOM61539420236.80.8%86,735Added+41,825
Littelfuse, Inc.LFUSCOM53700810436.30.8%79,800Added+8,000
Arcutis Biotherapeutics, Inc.ARQTCOM03969K10836.00.7%1,372,941Added+7,000
FirstCash Holdings, IncFCFSCOM33768G10735.90.7%166,105Added+440
Billiontoone, Inc.BLLNCOM09016810535.90.7%299,030New+299,030
Dana Inc.DANCOM23582520535.90.7%1,318,300Reduced−293,200
Element Solutions, Inc.ESICOM28618M10635.30.7%740,100New+740,100
AAR Corp.AIRCOM00036110535.20.7%246,325Added+1,200
Remitly Global, Inc.RELYCOM75960P10435.20.7%1,570,400Added+116,100
ICU Medical, Inc.ICUICOM44930G10734.80.7%237,050Added+33,340
Federal Signal Corp.FSSCOM31385510834.60.7%269,084Added+1,450
Ouster, Inc.OUSTCOM68989M20234.10.7%545,810New+545,810
Levi Strauss & Co.LEVICOM52736R10233.70.7%1,358,100Added+190,800
Merit Medical System IncMMSICOM58988910432.80.7%473,409Added+49,200
Assurant, Inc.AIZCOM04621X10832.80.7%122,100Added+19,800
Waystar Holding Corp.WAYCOM94678410532.60.7%1,589,364Added+421,890
CECO Environmental Corp.CECOCOM12514110132.50.7%358,072Added+223,040
Liquidia Corp.LQDACOM53635D20232.40.7%406,400Added+34,300
Encompass Health CorporationEHCCOM29261A10032.00.7%316,886Added+27,401
Indivior PlcINDVCOM45579U10932.00.7%779,188Added+125,775
Cognex Corp.CGNXCOM19242210331.00.6%427,820New+427,820
Granite ConstructionGVACOM38732810730.50.6%193,090New+193,090
Pdf Solutions, Inc.PDFSCOM69328210530.20.6%426,400New+426,400
Envista Holdings Corp.NVSTCOM29415F10429.50.6%1,120,782Added+455,382
Dave, Inc.DAVECOM23834J20129.40.6%78,902Added+12,200
Ambarella, Inc.COMG037AX10129.40.6%342,254Added+47,069
nLIGHT Inc.LASRCOM65487K10028.80.6%413,310Added+50,300
MYR Group, Inc.MYRGCOM55405W10427.10.6%54,190New+54,190
Adaptive BiotechnologiesADPTCOM00650F10927.00.6%1,258,751Added+451,800
Leonardo DRS, Inc.DRSCOM52661A10826.80.6%628,486Added+178,986
Tutor Perini Corp.TPCCOM90110910826.80.6%323,200Reduced−70,700
Kodiak Gas Services, Inc.KGSCOM50012A10826.70.6%355,870New+355,870
Kiniksa Pharmaceuticals, Ltd.COMG5269410926.40.5%413,034Added+94,400
Chime Financial Inc.CHYMCOM16935C10926.00.5%1,268,330Added+232,800
Alighnment Healthcare, Inc.ALHCCOM01625V10425.90.5%1,089,600Added+123,000
Halozyme Therapeutics, Inc.HALOCOM40637H10925.10.5%321,030Added+101,100
Irhythm Holdings, Inc.IRTCCOM45005610624.00.5%202,004Added+46,000
Ameris BancorpABCBCOM03076K10823.90.5%264,600Added+1,100
Zurn Elkay Water Solutions CorZWSCOM98983L10823.70.5%468,453Added+116,270
Osi Systems, Inc.OSISCOM67104410523.40.5%107,143Added+550
Omada Health, Inc.OMDACOM68170A10823.00.5%1,048,800New+1,048,800
Urban Outfitters, Inc.URBNCOM91704710222.40.5%316,192Added+1,400
ANI Pharmaceuticals, Inc.ANIPCOM00182C10322.00.5%265,306Added+43,920
EZCorp, Inc.EZPWCOM30230110621.80.5%631,800Reduced−7,600
Core Natural Resources, Inc.CNRCOM21893710021.70.4%271,170Added+1,370
Ducommun Inc.DCOCOM26414710921.10.4%113,800Added+13,900
Skyward Specialty Ins GroupSKWDCOM83094010221.00.4%359,100Added+32,000
Willdan Group Inc.WLDNCOM96924N10020.80.4%262,700New+262,700
A10 Networks, Inc.ATENCOM00212110120.60.4%552,000Added+47,700
HealthEquity Inc.HQYCOM42226A10720.60.4%228,291Added+61,650
Super Group SGHC Ltd.COMG8588X10320.60.4%1,521,000Added+6,600
SPX Technologies, Inc.SPXCCOM78473E10320.50.4%83,811Added+370
Formfactor Inc.FORMCOM34637510820.40.4%127,330New+127,330
Watts Water TechnologiesWTSCOM94274910219.90.4%50,840New+50,840
Openlane, Inc.OPLNCOM48238T10919.80.4%480,580New+480,580
Q2 Holdings, Inc.QTWOCOM74736L10919.70.4%410,409Added+15,780
Box, Inc.BOXCOM10316T10419.70.4%743,000Reduced−28,520
VSE Corp.VSECCOM91828410019.70.4%86,098Added+52,090
Benchmark Electronics IncBHECOM08160H10119.60.4%198,300Reduced−3,600
New York Times Co. Cl ANYTCOM65011110719.40.4%277,050Added+65,400
Advanced Energy Industry, Inc.AEISCOM00797310018.40.4%49,423Added+240
Eton Pharmaceuticals, Inc.ETONCOM29772L10818.20.4%501,600Added+62,300
AxoGen Inc.AXGNCOM05463X10617.90.4%388,194Added+45,800
FabrinetCOMG3323L10017.10.4%30,373Added+110
Argan, IncAGXCOM04010E10916.90.3%21,120Reduced−12,202
Vistance Networks, Inc.VISNCOM20337X10916.60.3%1,298,612Added+206,600
Trimas Corp.TRSCOM89621520916.30.3%362,000New+362,000
Zeta Global Holdings Corp.ZETACOM98956A10516.10.3%819,770Reduced−51,290
Seacoast Bkg Corp.SBCFCOM81170780115.90.3%477,866Added+99,000
Interface, Inc.TILECOM45866530415.90.3%443,200Reduced−700
Pediatrix Medical Group, Inc.MDCOM58502B10615.80.3%623,087Reduced−78,000
ProPetro Holding Corp.PUMPCOM74347M10815.70.3%1,097,100Added+131,600
Fastly, Inc.FSLYCOM31188V10015.60.3%852,322Reduced−218,700
Matador Resources CompanyMTDRCOM57648520515.60.3%314,200Added+1,500
OneSpaWorld Holdings LimitedCOMP7368411315.60.3%552,990Added+67,300
LeMaitre Vascular, Inc.LMATCOM52555820115.20.3%158,502Added+9,901
Calix, Inc.CALXCOM13100M50915.00.3%402,230Added+67,200
Arlo Technologies, Inc.ARLOCOM04206A10114.70.3%1,093,300Added+111,000
Innodata, Inc.INODCOM45764220514.30.3%189,200New+189,200
Magnite, Inc.MGNICOM55955D10014.00.3%735,000Added+87,400
Nicolet Bankshares, Inc.NICCOM65406E10213.80.3%83,200Added+8,400
M/I Homes, Inc.MHOCOM55305B10113.40.3%83,400Added+7,000
Grand Canyon Education, Inc.LOPECOM38526M10613.20.3%92,530Reduced−24,370
Imax Corp.IMAXCOM45245E10913.00.3%326,539Reduced−250,600
EPlus, Inc.PLUSCOM29426810712.60.3%150,998Added+13,500
Knowles Corp.KNCOM49926D10912.20.3%293,110Added+58,910
Interdigital, Inc.IDCCCOM45867G10112.20.3%42,935Added+290
Boot Barn Hldgs, Inc.BOOTCOM09940610012.00.2%73,200Added+5,000
Lindblad Expeditions Holdings,LINDCOM53521910911.90.2%420,721Added+42,000
Magnolia Oil & Gas Corp.MGYCOM55966310911.70.2%456,466Added+2,000
V2X, Inc.VVXCOM92242T10111.00.2%147,370New+147,370
Evolv Technologies HoldingsEVLVCOM30049H10210.60.2%1,823,949Added+152,000
CorMedix, Inc.CRMDCOM21900C30810.40.2%1,323,915Added+112,800
The Gorman-Rupp Co.GRCCOM38308210410.00.2%108,600Added+13,600
FB Financial Corp.FBKCOM30257X1049.80.2%177,100Added+15,000
Phibro Animal Health CorpPAHCCOM71742Q1069.80.2%311,100Added+34,000
NPK International, Inc.NPKICOM6517185049.30.2%587,550Added+69,400
American Public Education, IncAPEICOM02913V1039.30.2%172,400Added+42,000
Catalyst Pharmaceuticals, Inc.COM14888U1019.20.2%293,670Reduced−486,900
Addus Homecare Corp.ADUSCOM0067391069.00.2%89,916Added+520
Babcock & Wilcox Enterprises,BWCOM05614L2098.90.2%627,900Added+127,700
Radware, Ltd.COMM818731078.80.2%286,200Reduced−500
Amprius Technologies, Inc.AMPXCOM03214Q1088.80.2%636,200Added+51,200
Precision Drilling Corp.PDSCOM74022D4078.50.2%110,800Reduced−1,800
KForce, Inc.KFRCCOM4937321018.30.2%176,200New+176,200
1st Source Corp.SRCECOM3369011037.70.2%93,800Added+7,600
PC Connection, Inc.CNXNCOM69318J1007.60.2%104,300Added+8,100
Red Violet, Inc.RDVTCOM75704L1047.60.2%119,000Added+14,300
Bioventus, Inc.BVSCOM09075A1086.70.1%709,714Added+81,600
Expro LimitedCOMG3314M1096.70.1%452,000New+452,000
The Chefs' Warehouse, Inc.CHEFCOM1630861015.50.1%57,544New+57,544
The Vita Coco Co., Inc.COCOCOM92846Q1075.50.1%83,608Reduced−72,500
Rocky Brands, Inc.RCKYCOM7745151004.90.1%117,700Reduced−300
SPDR S&P 500 ETF TrustSPYETF78462F1031.8<0.1%2,378Added+4
ACM Research, Inc. Class AACMRCOM00108J1091.6<0.1%13,000Unchanged
JP Morgan Chase & Company Inc.JPMCOM46625H1001.0<0.1%3,206Added+22
Apple, Inc.AAPLCOM0378331001.0<0.1%3,532Added+1
Microsoft Corp.MSFTCOM5949181041.0<0.1%2,665Unchanged
Micron TechnologyMUCOM5951121030.8<0.1%700Unchanged
Alphabet, Inc. Cl AGOOGLCOM02079K3050.7<0.1%1,900Unchanged
Freshworks, Inc.FRSHCOM3580541040.6<0.1%57,750Unchanged
Johnson & JohnsonJNJCOM4781601040.6<0.1%2,298Added+4
Alphabet, Inc. Cl CGOOGLCOM02079K1070.6<0.1%1,620Unchanged
The Travelers Co., Inc.TRVCOM89417E1090.5<0.1%1,583Added+1
Amgen, Inc.AMGNCOM0311621000.4<0.1%1,036Unchanged
Bank of New York Mellon Corp.BNYCOM0640581000.4<0.1%2,511Added+1
Caterpillar, Inc.CATCOM1491231010.3<0.1%328Reduced−80
Mastercard, Inc.MACOM57636Q1040.3<0.1%662Unchanged
H World Group Ltd.HTHTCOM44332N1060.3<0.1%8,000Reduced−16,000
Intel CorporationINTCCOM4581401000.3<0.1%2,314New+2,314
Resmed Inc.RMDCOM7611521070.3<0.1%1,450Unchanged
Newmont MiningNEMCOM6516391060.3<0.1%2,876Added+1
Wells Fargo Co New Perp PfdPFD9497468040.3<0.1%225Unchanged
Wal Mart Stores Inc.WMTCOM9311421030.2<0.1%2,139Added+2
Aflac Inc.AFLCOM0010551020.2<0.1%2,000Unchanged
McDonald's CorporationMCDCOM5801351010.2<0.1%856Added+1
Freeport Mcmoran Copper & GoldFCXCOM35671D8570.2<0.1%3,593Added+3
Merck & Co.MRKCOM58933Y1050.2<0.1%1,730Unchanged
Eli Lilly & CompanyLLYCOM5324571080.2<0.1%183New+183
Xenacare Hldgs, Inc.COM98401A1060.00.0%140,000Unchanged

Sold out: 27 positions

Held at the end of the quarter before and not reported this quarter.

IssuerClassCUSIPReported value$WeightSharesPut or callChange on the quarter before
Alphatec Hldgs Inc.ATECCOM02081G2010.00.0%0Sold out−1,908,293
American Eagle OutfittersAEOCOM02553E1060.00.0%0Sold out−1,044,900
Artivion, IncAORTCOM2289031000.00.0%0Sold out−221,122
Black Rock Coffee Bar, Inc.BRCBCOM0922441020.00.0%0Sold out−365,600
Climb Global Solutions, Inc.CLMBCOM9467601050.00.0%0Sold out−211,840
Coursera, Inc.COURCOM22266M1040.00.0%0Sold out−821,800
CRA Int'l Inc.CRAICOM12618T1050.00.0%0Sold out−36,470
Expro Group Holdings N.V.COMN3144W1050.00.0%0Sold out−454,600
Exxon Mobil Corp.COM30231G1020.00.0%0Sold out−1,303
Flowserve CorporationFLSCOM34354P1050.00.0%0Sold out−434,681
Futu Holdings Ltd.FUTUCOM36118L1060.00.0%0Sold out−4,500
Genedx Holdings Corp.WGSCOM81663L2000.00.0%0Sold out−261,370
Genpact Ltd.COMG3922B1070.00.0%0Sold out−606,832
Huron Consulting Group, Inc.HURNCOM4474621020.00.0%0Sold out−42,300
IBEX Ltd.COMG4690M1010.00.0%0Sold out−10,200
Impinj, Inc.PICOM4532041090.00.0%0Sold out−118,086
Lincoln EDL SvcsLINCCOM5335351000.00.0%0Sold out−188,447
Mirion Technologies, Inc.MIRCOM60471A1010.00.0%0Sold out−744,267
National Vision Holdings, Inc.EYECOM63845R1070.00.0%0Sold out−797,780
Pegasystems Inc.PEGACOM7055731030.00.0%0Sold out−455,290
Primoris Services Corp.PRIMCOM74164F1030.00.0%0Sold out−166,100
Qualys, Inc.QLYSCOM74758T3030.00.0%0Sold out−118,900
Shake Shack, Inc.SHAKCOM8190471010.00.0%0Sold out−187,570
SPDR Gold Shares ETFGLDETF78463V1070.00.0%0Sold out−675
Tactile Sys Technology, Inc.TCMDCOM87357P1000.00.0%0Sold out−202,839
Thermon Group Hldgs Inc.COM88362T1030.00.0%0Sold out−154,700
Weave Communications, Inc.WEAVCOM94724R1080.00.0%0Sold out−72,830

Source: SEC EDGAR, Form 13F-HR, accession 0001213900-26-089777 (on sec.gov). Last ingested by Listed: Oct 22, 2026, 05:26 ET. Listed shows no prices and gives no investment advice.