Institutional
OBERWEIS ASSET MANAGEMENT INC/
CIK 0000937886
$3.39B
Reported AUM
180
Positions
Q1 2026
Period
2026-05-15
Filed
The Brief · OBERWEIS ASSET MANAGEMENT INC/ · Q1 2026
AI · grounded in 13F
OBERWEIS ASSET MANAGEMENT INC/ exited its position in CARG, reducing its holdings by $19.88M. The fund also closed positions in SXT and GENI, while trimming its stake in FRSH by 97.19%. On the buy side, the fund more than doubled its shares of DAN and increased its position in FSLY by 55.27%.
Portfolio · Q1 2026
Top holdings
| # | Stock | Issuer | Price | Day % | 1Y Gr. | 5Y Gr. | Value | % of book | Δ shares (QoQ) | Status |
|---|---|---|---|---|---|---|---|---|---|---|
| 1 | AAOI | Applied Optoelectronics Inc. | $90.11 | 17.76% | 255.41% | 943.93% | $198.8M | 5.87% | — | HELD |
| 2 | LITE | Lumentum Hldgs, Inc. | $693.24 | 15.09% | 549.83% | 700.14% | $187.1M | 5.53% | — | HELD |
| 3 | CRDO | Credo Technology Group | $201.08 | 13.32% | 86.95% | 1089.82% | $95.9M | 2.83% | — | HELD |
| 4 | DOCN | DigitalOcean Holdings, Inc. | $120.23 | 12.62% | 357.15% | 90.77% | $79.6M | 2.35% | — | HELD |
| 5 | SN | SharkNinja, Inc. | $163.33 | 2.58% | 42.67% | 369.81% | $63.5M | 1.88% | — | HELD |
| 6 | NVMI | Nova Ltd. | $394.07 | 7.40% | 49.52% | 289.59% | $59.9M | 1.77% | — | HELD |
| 7 | DAN | Dana Inc. | $27.06 | 0.93% | 76.04% | 31.54% | $54.2M | 1.60% | — | HELD |
| 8 | BTSG | BrightSpring Health Services | $72.88 | 5.06% | 270.32% | 709.01% | $49.4M | 1.46% | — | HELD |
| 9 | MTSI | Macom Technology Solutions | $248.71 | 8.74% | 81.83% | 308.25% | $47.9M | 1.42% | — | HELD |
| 10 | RMBS | Rambus, Inc | $89.58 | 8.18% | 21.94% | 271.01% | $45.3M | 1.34% | — | HELD |
| 11 | CLH | Clean Harbors, Inc. | $317.15 | -2.82% | 34.59% | 207.13% | $41.4M | 1.22% | — | HELD |
| 12 | SITM | SiTime Corporation | $527.87 | 14.22% | 139.35% | 117.14% | $41.2M | 1.22% | — | HELD |
| 13 | UCTT | Ultra Clean Holdings | $83.23 | 19.63% | 265.94% | 76.48% | $39.8M | 1.18% | — | HELD |
| 14 | ECG | Everus Construction Group | $122.94 | 12.61% | 75.02% | 92.92% | $38.6M | 1.14% | — | HELD |
| 15 | FTDR | Frontdoor, Inc. | $73.52 | -1.97% | 26.54% | 68.55% | $38.0M | 1.12% | — | HELD |
| 16 | CRS | Carpenter Technology Corp. | $503.71 | -5.07% | 95.93% | 1499.23% | $37.2M | 1.10% | — | HELD |
| 17 | SKYW | Skywest Inc | $108.26 | -1.28% | -0.78% | 132.07% | $36.0M | 1.06% | — | HELD |
| 18 | LSCC | Lattice Semiconductor Corporat | $124.53 | 10.24% | 130.58% | 81.84% | $34.7M | 1.03% | — | HELD |
| 19 | GMED | Globus Medical, Inc.-A | $80.26 | -1.42% | 54.67% | -0.22% | $33.8M | 1.00% | — | HELD |
| 20 | CAMT | Camtek, Ltd. | $137.23 | 8.08% | 43.42% | 236.85% | $33.8M | 1.00% | — | HELD |
| 21 | ARQT | Arcutis Biotherapeutics, Inc. | $27.99 | 0.47% | 94.26% | 31.13% | $32.2M | 0.95% | — | HELD |
| 22 | FLS | Flowserve Corporation | $75.32 | 7.69% | 44.75% | 118.63% | $32.0M | 0.94% | — | HELD |
| 23 | SIMO | Silicon Motion Techn ADR | $255.10 | 21.66% | 179.42% | 211.06% | $31.7M | 0.94% | — | HELD |
| 24 | LTH | Life Time Holdings, Inc. | $44.20 | -3.28% | 60.50% | 122.50% | $31.3M | 0.92% | — | HELD |
| 25 | RSI | Rush Street Interactive, Inc. | $26.76 | -13.03% | 38.29% | 79.84% | $31.2M | 0.92% | — | HELD |
| 26 | FCFS | FirstCash Holdings, Inc | $201.94 | -0.14% | 55.56% | 150.67% | $31.1M | 0.92% | — | HELD |
| 27 | FSLY | Fastly, Inc. | $21.55 | 4.16% | 238.84% | -50.57% | $31.1M | 0.92% | — | HELD |
| 28 | TPC | Tutor Perini Corp. | $83.28 | 8.61% | 81.15% | 473.48% | $30.4M | 0.90% | — | HELD |
| 29 | BROS | Dutch Bros., Inc. | $65.43 | 1.27% | 15.38% | -14.18% | $30.3M | 0.90% | — | HELD |
| 30 | SEI | Solaris Energy Infrastructur | $51.28 | 18.10% | 46.15% | 601.23% | $30.1M | 0.89% | — | HELD |
| 31 | MMSI | Merit Medical System Inc | $83.35 | 3.10% | — | — | $29.2M | 0.86% | — | HELD |
| 32 | FSS | Federal Signal Corp. | $124.55 | 11.34% | — | — | $28.9M | 0.85% | — | HELD |
| 33 | AMSC | American Superconductor | $29.45 | 10.55% | — | — | $28.8M | 0.85% | — | HELD |
| 34 | MRCY | Mercury Systems, Inc. | $95.97 | 6.43% | — | — | $28.5M | 0.84% | — | HELD |
| 35 | ACA | Arcosa, Inc. | $145.23 | 0.25% | — | — | $28.4M | 0.84% | — | HELD |
| 36 | OSIS | Osi Systems, Inc. | $219.92 | 2.76% | — | — | $28.3M | 0.84% | — | HELD |
| 37 | CNR | Core Natural Resources, Inc. | $81.13 | 4.12% | — | — | $28.3M | 0.83% | — | HELD |
| 38 | WAY | Waystar Holding Corp. | $20.94 | -14.60% | — | — | $28.1M | 0.83% | — | HELD |
| 39 | EHC | Encompass Health Corporation | $110.89 | -2.56% | — | — | $28.0M | 0.83% | — | HELD |
| 40 | VCYT | Veracyte, Inc. | $59.78 | 7.31% | — | — | $27.1M | 0.80% | — | HELD |
| 41 | AIR | AAR Corp. | $139.48 | 3.01% | — | — | $26.8M | 0.79% | — | HELD |
| 42 | ICUI | ICU Medical, Inc. | $168.38 | 1.11% | — | — | $26.3M | 0.78% | — | HELD |
| 43 | LFUS | Littelfuse, Inc. | $442.00 | 7.68% | — | — | $24.4M | 0.72% | — | HELD |
| 44 | PRIM | Primoris Services Corp. | $85.65 | 14.57% | — | — | $23.8M | 0.70% | — | HELD |
| 45 | RELY | Remitly Global, Inc. | $23.45 | 0.69% | — | — | $22.8M | 0.67% | — | HELD |
| 46 | G | Genpact Ltd. | $35.33 | -3.76% | — | — | $22.6M | 0.67% | — | HELD |
| 47 | AIZ | Assurant, Inc. | $282.46 | 0.52% | — | — | $22.3M | 0.66% | — | HELD |
| 48 | BLBD | Blue Bird Corporation | $74.60 | 3.15% | — | — | $22.1M | 0.65% | — | HELD |
| 49 | IMAX | Imax Corp. | $47.60 | -2.18% | — | — | $21.9M | 0.65% | — | HELD |
| 50 | LEVI | Levi Strauss & Co. | $24.55 | -0.49% | — | — | $21.6M | 0.64% | — | HELD |
| 51 | ATEC | Alphatec Hldgs Inc. | $9.66 | 0.10% | — | — | $20.8M | 0.61% | — | HELD |
| 52 | LASR | nLIGHT Inc. | $65.71 | 11.24% | — | — | $20.7M | 0.61% | — | HELD |
| 53 | EYE | National Vision Holdings, Inc. | $22.40 | 2.05% | — | — | $20.7M | 0.61% | — | HELD |
| 54 | ABCB | Ameris Bancorp | $87.57 | -0.30% | — | — | $20.6M | 0.61% | — | HELD |
| 55 | LIVN | LivaNova Plc | $81.05 | -0.47% | — | — | $20.5M | 0.60% | — | HELD |
| 56 | DRS | Leonardo DRS, Inc. | $45.62 | -1.98% | — | — | $20.0M | 0.59% | — | HELD |
| 57 | URBN | Urban Outfitters, Inc. | $75.74 | 0.45% | — | — | $19.9M | 0.59% | — | HELD |
| 58 | INDV | Indivior Plc | $40.22 | 0.30% | — | — | $19.9M | 0.59% | — | HELD |
| 59 | LOPE | Grand Canyon Education, Inc. | $150.13 | -5.76% | — | — | $19.9M | 0.59% | — | HELD |
| 60 | VISN | Vistance Networks, Inc. | $11.71 | 1.39% | — | — | $19.9M | 0.59% | — | HELD |
| 61 | MTDR | Matador Resources Company | $48.31 | -0.72% | — | — | $19.8M | 0.58% | — | HELD |
| 62 | VIAV | Viavi Solutions, Inc. | $35.05 | 8.75% | — | — | $19.7M | 0.58% | — | HELD |
| 63 | CHYM | Chime Financial Inc. | $22.60 | 0.80% | — | — | $19.4M | 0.57% | — | HELD |
| 64 | PEGA | Pegasystems Inc. | $30.03 | -2.97% | — | — | $19.4M | 0.57% | — | HELD |
| 65 | CPRX | Catalyst Pharmaceuticals, Inc. | — | — | — | — | $19.3M | 0.57% | — | HELD |
| 66 | QTWO | Q2 Holdings, Inc. | $59.07 | -2.23% | — | — | $18.7M | 0.55% | — | HELD |
| 67 | POWL | Powell Industries Inc. | $209.30 | 12.29% | — | — | $18.5M | 0.55% | — | HELD |
| 68 | IRTC | Irhythm Holdings, Inc. | $119.08 | -2.74% | — | — | $18.4M | 0.54% | — | HELD |
| 69 | BOX | Box, Inc. | $31.09 | -4.10% | — | — | $18.2M | 0.54% | — | HELD |
| 70 | AGX | Argan, Inc | $579.87 | 17.78% | — | — | $18.1M | 0.54% | — | HELD |
| 71 | HNGE | Hinge Health, Inc. | $75.11 | 1.42% | — | — | $18.0M | 0.53% | — | HELD |
| 72 | NYT | New York Times Co. Cl A | $75.83 | -2.39% | — | — | $17.7M | 0.52% | — | HELD |
| 73 | AEO | American Eagle Outfitters | $17.31 | -1.31% | — | — | $17.4M | 0.52% | — | HELD |
| 74 | ALHC | Alighnment Healthcare, Inc. | $18.61 | 1.75% | — | — | $17.0M | 0.50% | — | HELD |
| 75 | ANIP | ANI Pharmaceuticals, Inc. | $80.43 | -1.65% | — | — | $17.0M | 0.50% | — | HELD |
| 76 | NVST | Envista Holdings Corp. | $27.78 | -2.08% | — | — | $16.9M | 0.50% | — | HELD |
| 77 | WGS | Genedx Holdings Corp. | $68.96 | 8.28% | — | — | $16.8M | 0.50% | — | HELD |
| 78 | SPXC | SPX Technologies, Inc. | $199.30 | 6.21% | — | — | $16.7M | 0.49% | — | HELD |
| 79 | SHAK | Shake Shack, Inc. | $63.07 | 0.03% | — | — | $16.6M | 0.49% | — | HELD |
| 80 | CALX | Calix, Inc. | $35.18 | -1.04% | — | — | $16.4M | 0.48% | — | HELD |
| 81 | SGHC | Super Group SGHC Ltd. | $14.08 | -5.44% | — | — | $16.4M | 0.48% | — | HELD |
| 82 | EZPW | EZCorp, Inc. | $29.16 | 0.34% | — | — | $16.2M | 0.48% | — | HELD |
| 83 | LMAT | LeMaitre Vascular, Inc. | $102.19 | -1.33% | — | — | $16.2M | 0.48% | — | HELD |
| 84 | AEIS | Advanced Energy Industry, Inc. | $274.26 | 8.62% | — | — | $15.9M | 0.47% | — | HELD |
| 85 | ZWS | Zurn Elkay Water Solutions Cor | $50.12 | -2.77% | — | — | $15.8M | 0.47% | — | HELD |
| 86 | FN | Fabrinet | $439.33 | 5.99% | — | — | $15.8M | 0.47% | — | HELD |
| 87 | KNSA | Kiniksa Pharmaceuticals, Ltd. | $78.20 | -3.36% | — | — | $15.3M | 0.45% | — | HELD |
| 88 | PAHC | Phibro Animal Health Corp | $36.45 | -1.35% | — | — | $15.3M | 0.45% | — | HELD |
| 89 | DIOD | Diodes, Inc. | $82.00 | 7.77% | — | — | $15.3M | 0.45% | — | HELD |
| 90 | AMBA | Ambarella, Inc. | $74.09 | 7.08% | — | — | $15.2M | 0.45% | — | HELD |
| 91 | MD | Pediatrix Medical Group, Inc. | $26.48 | -0.94% | — | — | $15.0M | 0.44% | — | HELD |
| 92 | MGY | Magnolia Oil & Gas Corp. | $25.03 | 0.00% | — | — | $14.3M | 0.42% | — | HELD |
| 93 | SKWD | Skyward Specialty Ins Group | $59.87 | -4.24% | — | — | $14.3M | 0.42% | — | HELD |
| 94 | HALO | Halozyme Therapeutics, Inc. | $83.30 | 0.02% | — | — | $14.2M | 0.42% | — | HELD |
| 95 | LQDA | Liquidia Corp. | $86.80 | -0.02% | — | — | $14.0M | 0.41% | — | HELD |
| 96 | ARLO | Arlo Technologies, Inc. | $14.47 | -0.28% | — | — | $14.0M | 0.41% | — | HELD |
| 97 | HQY | HealthEquity Inc. | $100.99 | -3.02% | — | — | $13.9M | 0.41% | — | HELD |
| 98 | PUMP | ProPetro Holding Corp. | $10.82 | 5.97% | — | — | $13.9M | 0.41% | — | HELD |
| 99 | ZETA | Zeta Global Holdings Corp. | $21.37 | -3.22% | — | — | $13.9M | 0.41% | — | HELD |
| 100 | MIR | Mirion Technologies, Inc. | $14.84 | 1.85% | — | — | $13.8M | 0.41% | — | HELD |
| 101 | MOG/A | Moog Inc. - A | — | — | — | — | $13.1M | 0.39% | — | HELD |
| 102 | IDCC | Interdigital, Inc. | — | — | — | — | $12.9M | 0.38% | — | HELD |
| 103 | DCO | Ducommun Inc. | — | — | — | — | $12.2M | 0.36% | — | HELD |
| 104 | PI | Impinj, Inc. | — | — | — | — | $12.1M | 0.36% | — | HELD |
| 105 | ATEN | A10 Networks, Inc. | — | — | — | — | $11.7M | 0.34% | — | HELD |
| 106 | DAVE | Dave, Inc. | — | — | — | — | $11.6M | 0.34% | — | HELD |
| 107 | SBCF | Seacoast Bkg Corp. | — | — | — | — | $11.5M | 0.34% | — | HELD |
| 108 | AXGN | AxoGen Inc. | — | — | — | — | $11.3M | 0.34% | — | HELD |
| 109 | BHE | Benchmark Electronics Inc | — | — | — | — | $11.3M | 0.33% | — | HELD |
| 110 | ADPT | Adaptive Biotechnologies | — | — | — | — | $11.2M | 0.33% | — | HELD |
| 111 | OSW | OneSpaWorld Holdings Limited | — | — | — | — | $11.1M | 0.33% | — | HELD |
| 112 | NIC | Nicolet Bankshares, Inc. | — | — | — | — | $11.1M | 0.33% | — | HELD |
| 113 | PDS | Precision Drilling Corp. | — | — | — | — | $11.1M | 0.33% | — | HELD |
| 114 | TILE | Interface, Inc. | — | — | — | — | $11.1M | 0.33% | — | HELD |
| 115 | ETON | Eton Pharmaceuticals, Inc. | — | — | — | — | $10.8M | 0.32% | — | HELD |
| 116 | QLYS | Qualys, Inc. | — | — | — | — | $10.4M | 0.31% | — | HELD |
| 117 | PLUS | EPlus, Inc. | — | — | — | — | $10.3M | 0.31% | — | HELD |
| 118 | EVLV | Evolv Technologies Holdings | — | — | — | — | $10.1M | 0.30% | — | HELD |
| 119 | BOOT | Boot Barn Hldgs, Inc. | — | — | — | — | $10.0M | 0.29% | — | HELD |
| 120 | AMPX | Amprius Technologies, Inc. | — | — | — | — | $9.9M | 0.29% | — | HELD |
| 121 | MHO | M/I Homes, Inc. | — | — | — | — | $9.4M | 0.28% | — | HELD |
| 122 | FBK | FB Financial Corp. | — | — | — | — | $8.4M | 0.25% | — | HELD |
| 123 | ADUS | Addus Homecare Corp. | — | — | — | — | $8.4M | 0.25% | — | HELD |
| 124 | CRMD | CorMedix, Inc. | — | — | — | — | $8.2M | 0.24% | — | HELD |
| 125 | AORT | Artivion, Inc | — | — | — | — | $8.1M | 0.24% | — | HELD |
| 126 | CECO | CECO Environmental Corp. | — | — | — | — | $8.0M | 0.24% | — | HELD |
| 127 | XPRO | Expro Group Holdings N.V. | — | — | — | — | $7.9M | 0.23% | — | HELD |
| 128 | THR | Thermon Group Hldgs Inc. | — | — | — | — | $7.8M | 0.23% | — | HELD |
| 129 | MGNI | Magnite, Inc. | — | — | — | — | $7.7M | 0.23% | — | HELD |
| 130 | LINC | Lincoln EDL Svcs | — | — | — | — | $7.7M | 0.23% | — | HELD |
| 131 | RDWR | Radware, Ltd. | — | — | — | — | $7.5M | 0.22% | — | HELD |
| 132 | NPKI | NPK International, Inc. | — | — | — | — | $7.5M | 0.22% | — | HELD |
| 133 | COCO | The Vita Coco Co., Inc. | — | — | — | — | $7.5M | 0.22% | — | HELD |
| 134 | APEI | American Public Education, Inc | — | — | — | — | $7.4M | 0.22% | — | HELD |
| 135 | BW | Babcock & Wilcox Enterprises, | — | — | — | — | $7.3M | 0.22% | — | HELD |
| 136 | LIND | Lindblad Expeditions Holdings, | — | — | — | — | $6.6M | 0.19% | — | HELD |
| 137 | VSEC | VSE Corp. | — | — | — | — | $6.3M | 0.19% | — | HELD |
| 138 | KN | Knowles Corp. | — | — | — | — | $6.0M | 0.18% | — | HELD |
| 139 | SRCE | 1st Source Corp. | — | — | — | — | $6.0M | 0.18% | — | HELD |
| 140 | CRAI | CRA Int'l Inc. | — | — | — | — | $5.9M | 0.17% | — | HELD |
| 141 | GRC | The Gorman-Rupp Co. | — | — | — | — | $5.9M | 0.17% | — | HELD |
| 142 | BVS | Bioventus, Inc. | — | — | — | — | $5.7M | 0.17% | — | HELD |
| 143 | CNXN | PC Connection, Inc. | — | — | — | — | $5.6M | 0.17% | — | HELD |
| 144 | HURN | Huron Consulting Group, Inc. | — | — | — | — | $5.4M | 0.16% | — | HELD |
| 145 | TCMD | Tactile Sys Technology, Inc. | — | — | — | — | $5.3M | 0.16% | — | HELD |
| 146 | COUR | Coursera, Inc. | — | — | — | — | $4.8M | 0.14% | — | HELD |
| 147 | BRCB | Black Rock Coffee Bar, Inc. | — | — | — | — | $4.7M | 0.14% | — | HELD |
| 148 | RCKY | Rocky Brands, Inc. | — | — | — | — | $4.6M | 0.13% | — | HELD |
| 149 | CLMB | Climb Global Solutions, Inc. | — | — | — | — | $4.2M | 0.12% | — | HELD |
| 150 | RDVT | Red Violet, Inc. | — | — | — | — | $3.6M | 0.11% | — | HELD |
| 151 | SPY | SPDR S&P 500 ETF Trust | — | — | — | — | $1.5M | 0.05% | — | HELD |
| 152 | HTHT | H World Group Ltd. | — | — | — | — | $1.2M | 0.04% | — | HELD |
| 153 | MSFT | Microsoft Corp. | — | — | — | — | $987K | 0.03% | — | HELD |
| 154 | JPM | JP Morgan Chase & Company Inc. | — | — | — | — | $936K | 0.03% | — | HELD |
| 155 | AAPL | Apple, Inc. | — | — | — | — | $896K | 0.03% | — | HELD |
| 156 | FUTU | Futu Holdings Ltd. | — | — | — | — | $615K | 0.02% | — | HELD |
| 157 | JNJ | Johnson & Johnson | — | — | — | — | $561K | 0.02% | — | HELD |
| 158 | — | Alphabet, Inc. Cl A | — | — | — | — | $546K | 0.02% | — | HELD |
| 159 | ACMR | ACM Research, Inc. Class A | — | — | — | — | $512K | 0.02% | — | HELD |
| 160 | — | Alphabet, Inc. Cl C | — | — | — | — | $465K | 0.01% | — | HELD |
| 161 | FRSH | Freshworks, Inc. | — | — | — | — | $464K | 0.01% | — | HELD |
| 162 | TRV | The Travelers Co., Inc. | — | — | — | — | $461K | 0.01% | — | HELD |
| 163 | AMGN | Amgen, Inc. | — | — | — | — | $364K | 0.01% | — | HELD |
| 164 | WEAV | Weave Communications, Inc. | — | — | — | — | $336K | 0.01% | — | HELD |
| 165 | MA | Mastercard, Inc. | — | — | — | — | $331K | 0.01% | — | HELD |
| 166 | RMD | Resmed Inc. | — | — | — | — | $325K | 0.01% | — | HELD |
| 167 | NEM | Newmont Mining | — | — | — | — | $311K | 0.01% | — | HELD |
| 168 | BK | Bank of New York Mellon Corp. | — | — | — | — | $298K | 0.01% | — | HELD |
| 169 | GLD | SPDR Gold Shares ETF | — | — | — | — | $290K | 0.01% | — | HELD |
| 170 | CAT | Caterpillar, Inc. | — | — | — | — | $289K | 0.01% | — | HELD |
| 171 | — | IBEX Ltd. | — | — | — | — | $274K | 0.01% | — | HELD |
| 172 | WMT | Wal Mart Stores Inc. | — | — | — | — | $266K | 0.01% | — | HELD |
| 173 | MCD | McDonald's Corporation | — | — | — | — | $266K | 0.01% | — | HELD |
| 174 | WFC 7.5 PERP L | Wells Fargo Co New Perp Pfd | — | — | — | — | $260K | 0.01% | — | HELD |
| 175 | MU | Micron Technology | — | — | — | — | $236K | 0.01% | — | HELD |
| 176 | XOM | Exxon Mobil Corp. | — | — | — | — | $221K | 0.01% | — | HELD |
| 177 | AFL | Aflac Inc. | — | — | — | — | $219K | 0.01% | — | HELD |
| 178 | FCX | Freeport Mcmoran Copper & Gold | — | — | — | — | $211K | 0.01% | — | HELD |
| 179 | MRK | Merck & Co. | — | — | — | — | $208K | 0.01% | — | HELD |
| 180 | — | Xenacare Hldgs, Inc. | — | — | — | — | — | — | — | HELD |
Source: SEC EDGAR · accession 0001213900-26-057307. 13F discloses long positions only — shorts, foreign equities, and options are excluded.