OBERWEIS ASSET MANAGEMENT INC/ Q4 2023 Filing
Filed February 14, 2024
Portfolio Value
$1.1B
Holdings
192
Report Date
Q4 2023
Filing Type
13F-HR
All Holdings (192 positions)
| # | Stock | Shares | Value | % Portfolio | Type |
|---|---|---|---|---|---|
| 1 | CSTMConstellium NV Cl A | 1,850,371 | $36.9T | 3440190.63% | |
| 2 | ACLSAxcelis Technologies | 245,329 | $31.8T | 2963592.86% | |
| 3 | AEHRAehr Test Systems | 1,091,202 | $28.9T | 2696531.90% | |
| 4 | ATECAlphatec Hldgs Inc. | 1,607,820 | $24.3T | 2262898.36% | |
| 5 | WFRDWeatherford International PLC | 240,060 | $23.5T | 2187535.05% | |
| 6 | AMPHAmphastar Pharmaceuticals, Inc | 340,265 | $21.0T | 1960289.16% | |
| 7 | VCYTVeracyte, Inc. | 656,810 | $18.1T | 1683036.38% | |
| 8 | AAOIApplied Optoelectronics Inc. | 891,915 | $17.2T | 1605069.18% | |
| 9 | TMDXTransMedics Group, Inc. | 212,900 | $16.8T | 1565239.95% | |
| 10 | PERIPerion Network, Ltd. | 456,290 | $14.1T | 1312020.83% | |
| 11 | OLEDUniversal Display Corp. | 66,542 | $12.7T | 1185453.70% | |
| 12 | ADMAADMA Biologics, Inc. | 2,710,700 | $12.3T | 1141255.94% | |
| 13 | CAMTCamtek, Ltd. | 174,480 | $12.1T | 1127568.91% | |
| 14 | VRTVertiv Holdings Co. | 233,672 | $11.2T | 1045399.53% | |
| 15 | AXNX*Axonics, Inc. | 178,470 | $11.1T | 1034494.49% | |
| 16 | OSKOshkosh Corp. | 98,899 | $10.7T | 998676.03% | |
| 17 | FLSFlowserve Corporation | 245,271 | $10.1T | 941711.33% | |
| 18 | CLHClean Harbors, Inc. | 57,055 | $10.0T | 927421.56% | |
| 19 | EHCEncompass Health Corporation | 145,245 | $9.7T | 902652.05% | |
| 20 | FTDRFrontdoor, Inc. | 271,100 | $9.5T | 889369.09% | |
| 21 | HAEHaemonetics Corp. | 105,880 | $9.1T | 843323.12% | |
| 22 | ICFIICF International, Inc. | 66,100 | $8.9T | 825583.51% | |
| 23 | JPXAerovironment, Inc. | 69,800 | $8.8T | 819458.52% | |
| 24 | CECOCECO Environmental Corp. | 426,700 | $8.7T | 806034.73% | |
| 25 | UCTTUltra Clean Holdings | 247,100 | $8.4T | 785777.20% | |
| 26 | PSNParsons Corp. | 133,000 | $8.3T | 776875.82% | |
| 27 | BELFBBel Fuse, Inc. | 124,300 | $8.3T | 773064.38% | |
| 28 | ZETAZeta Global Holdings Corp. | 935,480 | $8.3T | 768539.64% | |
| 29 | MMSIMerit Medical System Inc | 107,090 | $8.1T | 757699.52% | |
| 30 | PWIPower Integrations | 98,195 | $8.1T | 751015.01% | |
| 31 | DECKDeckers Outdoor Corp. | 12,045 | $8.1T | 749938.90% | |
| 32 | FCFSFirstCash Holdings, Inc | 74,200 | $8.0T | 749128.43% | |
| 33 | ALGMAllegro MicroSystems, Inc. | 257,980 | $7.8T | 727380.48% | |
| 34 | PLABPhotronics, Inc. | 247,500 | $7.8T | 723190.78% | |
| 35 | NVTSNavitas Semiconductor Corp. | 959,900 | $7.7T | 721543.78% | |
| 36 | STRLSterling Construction Co., Inc | 88,000 | $7.7T | 720747.10% | |
| 37 | BLBDBlue Bird Corporation | 286,700 | $7.7T | 719963.93% | |
| 38 | ACMRACM Research, Inc. Class A | 393,400 | $7.7T | 716014.93% | |
| 39 | FSSFederal Signal Corp. | 98,830 | $7.6T | 706437.49% | |
| 40 | VECOVeeco Instruments, Inc. | 240,000 | $7.4T | 693675.22% | |
| 41 | SPXCSPX Technologies, Inc. | 73,000 | $7.4T | 686831.80% | |
| 42 | EVHEvolent Health, Inc. | 214,540 | $7.1T | 660054.81% | |
| 43 | WWDWoodward, Inc. | 52,000 | $7.1T | 659356.59% | |
| 44 | ITGRInteger Holdings Corporation | 71,000 | $7.0T | 655250.72% | |
| 45 | ACHCAcadia Healthcare Co., Inc. | 90,200 | $7.0T | 653319.99% | |
| 46 | WEAVWeave Communications, Inc. | 609,400 | $7.0T | 651072.01% | |
| 47 | SKYWSkywest Inc | 133,700 | $7.0T | 650077.40% | |
| 48 | PRIMPrimoris Services Corp. | 209,900 | $7.0T | 649298.61% | |
| 49 | IPARInter Parfums | 48,400 | $7.0T | 649233.88% | |
| 50 | JBIJanus International Group, Inc | 528,400 | $6.9T | 642297.87% | |
| 51 | ESABESAB Corporation | 79,100 | $6.9T | 638201.50% | |
| 52 | ONTOOnto Innovation, Inc. | 44,600 | $6.8T | 635192.71% | |
| 53 | MHOM/I Homes, Inc. | 48,800 | $6.7T | 626099.07% | |
| 54 | GIIIG-III Apparel Group Ltd. | 196,600 | $6.7T | 622257.37% | |
| 55 | FMFFormfactor Inc. | 159,200 | $6.6T | 618509.56% | |
| 56 | PFBCPreferred Bank | 89,600 | $6.5T | 609665.18% | |
| 57 | HNIHNI Corp. | 154,800 | $6.5T | 603145.35% | |
| 58 | NEONeoGenomics, Inc. | 392,700 | $6.4T | 591837.64% | |
| 59 | MGPIMGP Ingredients, Inc. | 64,450 | $6.3T | 591439.72% | |
| 60 | FNFabrinet | 33,200 | $6.3T | 588584.05% | |
| 61 | YOUClear Secure, Inc. | 303,500 | $6.3T | 583770.19% | |
| 62 | RESRPC, Inc. | 858,128 | $6.2T | 581897.49% | |
| 63 | THRThermon Group Hldgs Inc. | 190,700 | $6.2T | 578537.63% | |
| 64 | PLYAPlaya Hotels & Resorts N.V. | 701,500 | $6.1T | 565206.23% | |
| 65 | SIBNSI-BONE, Inc. | 287,100 | $6.0T | 561317.77% | |
| 66 | PETQEURPetlQ Inc | 304,400 | $6.0T | 559983.08% | |
| 67 | UPWKUpwork, Inc. | 396,900 | $5.9T | 549737.33% | |
| 68 | CPRXCatalyst Pharmaceuticals, Inc. | 348,600 | $5.9T | 545831.07% | |
| 69 | DVAXDynavax Technologies Corp. | 417,400 | $5.8T | 543529.07% | |
| 70 | KWRQuaker Chemical Corporation | 27,000 | $5.8T | 536737.63% | |
| 71 | EZPWEZCorp, Inc. | 655,500 | $5.7T | 533638.67% | |
| 72 | VCVisteon Corp. | 43,770 | $5.5T | 509216.12% | |
| 73 | SMCIUSDSuper Micro Computer Inc. | 19,100 | $5.4T | 505722.50% | |
| 74 | BJRIBJ's Restaurants, Inc. | 148,600 | $5.4T | 498431.05% | |
| 75 | RAMPLiveramp Hldgs, Inc. | 139,000 | $5.3T | 490442.31% | |
| 76 | HEESEURH&E Equipment Services, Inc. | 98,900 | $5.2T | 481977.97% | |
| 77 | AIZAssurant, Inc. | 30,700 | $5.2T | 481809.84% | |
| 78 | INFA1EURInformatica Corp. | 182,100 | $5.2T | 481546.80% | |
| 79 | MODModine Mfg Co Com | 86,500 | $5.2T | 481009.44% | |
| 80 | ATGEAdtalem Global Education Inc. | 86,500 | $5.1T | 474966.61% | |
| 81 | —Rover Group, Inc. | 466,200 | $5.1T | 472459.22% | |
| 82 | MMSMaximus, Inc. | 60,400 | $5.1T | 471796.76% | |
| 83 | TASTUSDCarrols Restaurant Group, Inc. | 623,500 | $4.9T | 457641.96% | |
| 84 | JELDJELD-WEN Holding, Inc. | 260,200 | $4.9T | 457585.70% | |
| 85 | HURNHuron Consulting Group, Inc. | 47,500 | $4.9T | 454830.82% | |
| 86 | ANFAbercrombie & Fitch Co. | 55,000 | $4.9T | 451952.61% | |
| 87 | NXTNextracker, Inc. | 103,200 | $4.8T | 450352.37% | |
| 88 | MSAMSA Safety Inc | 28,100 | $4.7T | 441895.01% | |
| 89 | SNCYSun Country Airlines Holdings, | 297,700 | $4.7T | 436184.99% | |
| 90 | SIMOSilicon Motion Techn ADR | 76,400 | $4.7T | 436017.98% | |
| 91 | VVXV2X, Inc. | 100,700 | $4.7T | 435596.96% | |
| 92 | CROXCrocs, Inc. | 50,000 | $4.7T | 435037.34% | |
| 93 | ATDATI, Inc. | 102,500 | $4.7T | 434122.18% | |
| 94 | AORTArtivion, Inc | 258,000 | $4.6T | 429685.19% | |
| 95 | PRLBProto Labs Inc. | 117,400 | $4.6T | 426039.83% | |
| 96 | OSISOsi Systems, Inc. | 35,300 | $4.6T | 424322.32% | |
| 97 | 8LP1Vital Energy, Inc. | 99,700 | $4.5T | 422448.97% | |
| 98 | LMBLimbach Hldgs, Inc. | 99,494 | $4.5T | 421390.74% | |
| 99 | FSLYFastly, Inc. | 249,800 | $4.4T | 414167.10% | |
| 100 | TSAACI Worldwide Inc. | 144,262 | $4.4T | 411184.29% |
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