Q1 2026 · 13F-HR
OBERWEIS ASSET MANAGEMENT INC/holdings as filed
Filed 2026-05-15 · accession 0001213900-26-057307
$3.39B
Reported value
180
Positions
2026-03-31
Period end
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%.
Holdings as filed
| CUSIP | Ticker | Issuer | Value | % port. | Shares | Class | Voting |
|---|---|---|---|---|---|---|---|
| 03823U102 | AAOI | Applied Optoelectronics Inc. | $198.8M | 5.87% | 2,349,969 | Common | SOLE |
| 55024U109 | LITE | Lumentum Hldgs, Inc. | $187.1M | 5.53% | 266,222 | Common | SOLE |
| G25457105 | CRDO | Credo Technology Group | $95.9M | 2.83% | 1,021,968 | Common | SOLE |
| 25402D102 | DOCN | DigitalOcean Holdings, Inc. | $79.6M | 2.35% | 927,505 | Common | SOLE |
| G8068L108 | SN | SharkNinja, Inc. | $63.5M | 1.88% | 599,970 | Common | SOLE |
| M7516K103 | NVMI | Nova Ltd. | $59.9M | 1.77% | 137,955 | Common | SOLE |
| 235825205 | DAN | Dana Inc. | $54.2M | 1.60% | 1,611,500 | Common | SOLE |
| 10950A106 | BTSG | BrightSpring Health Services | $49.4M | 1.46% | 1,158,970 | Common | SOLE |
| 55405Y100 | MTSI | Macom Technology Solutions | $47.9M | 1.42% | 215,886 | Common | SOLE |
| 750917106 | RMBS | Rambus, Inc | $45.3M | 1.34% | 526,316 | Common | SOLE |
| 184496107 | CLH | Clean Harbors, Inc. | $41.4M | 1.22% | 144,355 | Common | SOLE |
| 82982T106 | SITM | SiTime Corporation | $41.2M | 1.22% | 119,281 | Common | SOLE |
| 90385V107 | UCTT | Ultra Clean Holdings | $39.8M | 1.18% | 640,476 | Common | SOLE |
| 300426103 | ECG | Everus Construction Group | $38.6M | 1.14% | 326,533 | Common | SOLE |
| 35905A109 | FTDR | Frontdoor, Inc. | $38.0M | 1.12% | 717,960 | Common | SOLE |
| 144285103 | CRS | Carpenter Technology Corp. | $37.2M | 1.10% | 94,433 | Common | SOLE |
| 830879102 | SKYW | Skywest Inc | $36.0M | 1.06% | 392,499 | Common | SOLE |
| 518415104 | LSCC | Lattice Semiconductor Corporat | $34.7M | 1.03% | 374,436 | Common | SOLE |
| 379577208 | GMED | Globus Medical, Inc.-A | $33.8M | 1.00% | 392,200 | Common | SOLE |
| M20791105 | CAMT | Camtek, Ltd. | $33.8M | 1.00% | 222,780 | Common | SOLE |
| 03969K108 | ARQT | Arcutis Biotherapeutics, Inc. | $32.2M | 0.95% | 1,365,941 | Common | SOLE |
| 34354P105 | FLS | Flowserve Corporation | $32.0M | 0.94% | 434,681 | Common | SOLE |
| 82706C108 | SIMO | Silicon Motion Techn ADR | $31.7M | 0.94% | 282,550 | Common | SOLE |
| 53190C102 | LTH | Life Time Holdings, Inc. | $31.3M | 0.92% | 1,160,500 | Common | SOLE |
| 782011100 | RSI | Rush Street Interactive, Inc. | $31.2M | 0.92% | 1,434,560 | Common | SOLE |
| 33768G107 | FCFS | FirstCash Holdings, Inc | $31.1M | 0.92% | 165,665 | Common | SOLE |
| 31188V100 | FSLY | Fastly, Inc. | $31.1M | 0.92% | 1,071,022 | Common | SOLE |
| 901109108 | TPC | Tutor Perini Corp. | $30.4M | 0.90% | 393,900 | Common | SOLE |
| 26701L100 | BROS | Dutch Bros., Inc. | $30.3M | 0.90% | 598,493 | Common | SOLE |
| 83418M103 | SEI | Solaris Energy Infrastructur | $30.1M | 0.89% | 531,889 | Common | SOLE |
| 589889104 | MMSI | Merit Medical System Inc | $29.2M | 0.86% | 424,209 | Common | SOLE |
| 313855108 | FSS | Federal Signal Corp. | $28.9M | 0.85% | 267,634 | Common | SOLE |
| 030111207 | AMSC | American Superconductor | $28.8M | 0.85% | 849,900 | Common | SOLE |
| 589378108 | MRCY | Mercury Systems, Inc. | $28.5M | 0.84% | 391,023 | Common | SOLE |
| 039653100 | ACA | Arcosa, Inc. | $28.4M | 0.84% | 267,700 | Common | SOLE |
| 671044105 | OSIS | Osi Systems, Inc. | $28.3M | 0.84% | 106,593 | Common | SOLE |
| 218937100 | CNR | Core Natural Resources, Inc. | $28.3M | 0.83% | 269,800 | Common | SOLE |
| 946784105 | WAY | Waystar Holding Corp. | $28.1M | 0.83% | 1,167,474 | Common | SOLE |
| 29261A100 | EHC | Encompass Health Corporation | $28.0M | 0.83% | 289,485 | Common | SOLE |
| 92337F107 | VCYT | Veracyte, Inc. | $27.1M | 0.80% | 839,834 | Common | SOLE |
| 000361105 | AIR | AAR Corp. | $26.8M | 0.79% | 245,125 | Common | SOLE |
| 44930G107 | ICUI | ICU Medical, Inc. | $26.3M | 0.78% | 203,710 | Common | SOLE |
| 537008104 | LFUS | Littelfuse, Inc. | $24.4M | 0.72% | 71,800 | Common | SOLE |
| 74164F103 | PRIM | Primoris Services Corp. | $23.8M | 0.70% | 166,100 | Common | SOLE |
| 75960P104 | RELY | Remitly Global, Inc. | $22.8M | 0.67% | 1,454,300 | Common | SOLE |
| G3922B107 | G | Genpact Ltd. | $22.6M | 0.67% | 606,832 | Common | SOLE |
| 04621X108 | AIZ | Assurant, Inc. | $22.3M | 0.66% | 102,300 | Common | SOLE |
| 095306106 | BLBD | Blue Bird Corporation | $22.1M | 0.65% | 389,238 | Common | SOLE |
| 45245E109 | IMAX | Imax Corp. | $21.9M | 0.65% | 577,139 | Common | SOLE |
| 52736R102 | LEVI | Levi Strauss & Co. | $21.6M | 0.64% | 1,167,300 | Common | SOLE |
| 02081G201 | ATEC | Alphatec Hldgs Inc. | $20.8M | 0.61% | 1,908,293 | Common | SOLE |
| 65487K100 | LASR | nLIGHT Inc. | $20.7M | 0.61% | 363,010 | Common | SOLE |
| 63845R107 | EYE | National Vision Holdings, Inc. | $20.7M | 0.61% | 797,780 | Common | SOLE |
| 03076K108 | ABCB | Ameris Bancorp | $20.6M | 0.61% | 263,500 | Common | SOLE |
| G5509L101 | LIVN | LivaNova Plc | $20.5M | 0.60% | 321,900 | Common | SOLE |
| 52661A108 | DRS | Leonardo DRS, Inc. | $20.0M | 0.59% | 449,500 | Common | SOLE |
| 917047102 | URBN | Urban Outfitters, Inc. | $19.9M | 0.59% | 314,792 | Common | SOLE |
| 45579U109 | INDV | Indivior Plc | $19.9M | 0.59% | 653,413 | Common | SOLE |
| 38526M106 | LOPE | Grand Canyon Education, Inc. | $19.9M | 0.59% | 116,900 | Common | SOLE |
| 20337X109 | VISN | Vistance Networks, Inc. | $19.9M | 0.59% | 1,092,012 | Common | SOLE |
| 576485205 | MTDR | Matador Resources Company | $19.8M | 0.58% | 312,700 | Common | SOLE |
| 925550105 | VIAV | Viavi Solutions, Inc. | $19.7M | 0.58% | 593,200 | Common | SOLE |
| 16935C109 | CHYM | Chime Financial Inc. | $19.4M | 0.57% | 1,035,530 | Common | SOLE |
| 705573103 | PEGA | Pegasystems Inc. | $19.4M | 0.57% | 455,290 | Common | SOLE |
| 14888U101 | CPRX | Catalyst Pharmaceuticals, Inc. | $19.3M | 0.57% | 780,570 | Common | SOLE |
| 74736L109 | QTWO | Q2 Holdings, Inc. | $18.7M | 0.55% | 394,629 | Common | SOLE |
| 739128106 | POWL | Powell Industries Inc. | $18.5M | 0.55% | 34,157 | Common | SOLE |
| 450056106 | IRTC | Irhythm Holdings, Inc. | $18.4M | 0.54% | 156,004 | Common | SOLE |
| 10316T104 | BOX | Box, Inc. | $18.2M | 0.54% | 771,520 | Common | SOLE |
| 04010E109 | AGX | Argan, Inc | $18.1M | 0.54% | 33,322 | Common | SOLE |
| 433313103 | HNGE | Hinge Health, Inc. | $18.0M | 0.53% | 465,766 | Common | SOLE |
| 650111107 | NYT | New York Times Co. Cl A | $17.7M | 0.52% | 211,650 | Common | SOLE |
| 02553E106 | AEO | American Eagle Outfitters | $17.4M | 0.52% | 1,044,900 | Common | SOLE |
| 01625V104 | ALHC | Alighnment Healthcare, Inc. | $17.0M | 0.50% | 966,600 | Common | SOLE |
| 00182C103 | ANIP | ANI Pharmaceuticals, Inc. | $17.0M | 0.50% | 221,386 | Common | SOLE |
| 29415F104 | NVST | Envista Holdings Corp. | $16.9M | 0.50% | 665,400 | Common | SOLE |
| 81663L200 | WGS | Genedx Holdings Corp. | $16.8M | 0.50% | 261,370 | Common | SOLE |
| 78473E103 | SPXC | SPX Technologies, Inc. | $16.7M | 0.49% | 83,441 | Common | SOLE |
| 819047101 | SHAK | Shake Shack, Inc. | $16.6M | 0.49% | 187,570 | Common | SOLE |
| 13100M509 | CALX | Calix, Inc. | $16.4M | 0.48% | 335,030 | Common | SOLE |
| G8588X103 | SGHC | Super Group SGHC Ltd. | $16.4M | 0.48% | 1,514,400 | Common | SOLE |
| 302301106 | EZPW | EZCorp, Inc. | $16.2M | 0.48% | 639,400 | Common | SOLE |
| 525558201 | LMAT | LeMaitre Vascular, Inc. | $16.2M | 0.48% | 148,601 | Common | SOLE |
| 007973100 | AEIS | Advanced Energy Industry, Inc. | $15.9M | 0.47% | 49,183 | Common | SOLE |
| 98983L108 | ZWS | Zurn Elkay Water Solutions Cor | $15.8M | 0.47% | 352,183 | Common | SOLE |
| G3323L100 | FN | Fabrinet | $15.8M | 0.47% | 30,263 | Common | SOLE |
| G52694109 | KNSA | Kiniksa Pharmaceuticals, Ltd. | $15.3M | 0.45% | 318,634 | Common | SOLE |
| 71742Q106 | PAHC | Phibro Animal Health Corp | $15.3M | 0.45% | 277,100 | Common | SOLE |
| 254543101 | DIOD | Diodes, Inc. | $15.3M | 0.45% | 224,300 | Common | SOLE |
| G037AX101 | AMBA | Ambarella, Inc. | $15.2M | 0.45% | 295,185 | Common | SOLE |
| 58502B106 | MD | Pediatrix Medical Group, Inc. | $15.0M | 0.44% | 701,087 | Common | SOLE |
| 559663109 | MGY | Magnolia Oil & Gas Corp. | $14.3M | 0.42% | 454,466 | Common | SOLE |
| 830940102 | SKWD | Skyward Specialty Ins Group | $14.3M | 0.42% | 327,100 | Common | SOLE |
| 40637H109 | HALO | Halozyme Therapeutics, Inc. | $14.2M | 0.42% | 219,930 | Common | SOLE |
| 53635D202 | LQDA | Liquidia Corp. | $14.0M | 0.41% | 372,100 | Common | SOLE |
| 04206A101 | ARLO | Arlo Technologies, Inc. | $14.0M | 0.41% | 982,300 | Common | SOLE |
| 42226A107 | HQY | HealthEquity Inc. | $13.9M | 0.41% | 166,641 | Common | SOLE |
| 74347M108 | PUMP | ProPetro Holding Corp. | $13.9M | 0.41% | 965,500 | Common | SOLE |
| 98956A105 | ZETA | Zeta Global Holdings Corp. | $13.9M | 0.41% | 871,060 | Common | SOLE |
| 60471A101 | MIR | Mirion Technologies, Inc. | $13.8M | 0.41% | 744,267 | Common | SOLE |
| 615394202 | MOG/A | Moog Inc. - A | $13.1M | 0.39% | 44,910 | Common | SOLE |
| 45867G101 | IDCC | Interdigital, Inc. | $12.9M | 0.38% | 42,645 | Common | SOLE |
| 264147109 | DCO | Ducommun Inc. | $12.2M | 0.36% | 99,900 | Common | SOLE |
| 453204109 | PI | Impinj, Inc. | $12.1M | 0.36% | 118,086 | Common | SOLE |
| 002121101 | ATEN | A10 Networks, Inc. | $11.7M | 0.34% | 504,300 | Common | SOLE |
| 23834J201 | DAVE | Dave, Inc. | $11.6M | 0.34% | 66,702 | Common | SOLE |
| 811707801 | SBCF | Seacoast Bkg Corp. | $11.5M | 0.34% | 378,866 | Common | SOLE |
| 05463X106 | AXGN | AxoGen Inc. | $11.3M | 0.34% | 342,394 | Common | SOLE |
| 08160H101 | BHE | Benchmark Electronics Inc | $11.3M | 0.33% | 201,900 | Common | SOLE |
| 00650F109 | ADPT | Adaptive Biotechnologies | $11.2M | 0.33% | 806,951 | Common | SOLE |
| P73684113 | OSW | OneSpaWorld Holdings Limited | $11.1M | 0.33% | 485,690 | Common | SOLE |
| 65406E102 | NIC | Nicolet Bankshares, Inc. | $11.1M | 0.33% | 74,800 | Common | SOLE |
| 74022D407 | PDS | Precision Drilling Corp. | $11.1M | 0.33% | 112,600 | Common | SOLE |
| 458665304 | TILE | Interface, Inc. | $11.1M | 0.33% | 443,900 | Common | SOLE |
| 29772L108 | ETON | Eton Pharmaceuticals, Inc. | $10.8M | 0.32% | 439,300 | Common | SOLE |
| 74758T303 | QLYS | Qualys, Inc. | $10.4M | 0.31% | 118,900 | Common | SOLE |
| 294268107 | PLUS | EPlus, Inc. | $10.3M | 0.31% | 137,498 | Common | SOLE |
| 30049H102 | EVLV | Evolv Technologies Holdings | $10.1M | 0.30% | 1,671,949 | Common | SOLE |
| 099406100 | BOOT | Boot Barn Hldgs, Inc. | $10.0M | 0.29% | 68,200 | Common | SOLE |
| 03214Q108 | AMPX | Amprius Technologies, Inc. | $9.9M | 0.29% | 585,000 | Common | SOLE |
| 55305B101 | MHO | M/I Homes, Inc. | $9.4M | 0.28% | 76,400 | Common | SOLE |
| 30257X104 | FBK | FB Financial Corp. | $8.4M | 0.25% | 162,100 | Common | SOLE |
| 006739106 | ADUS | Addus Homecare Corp. | $8.4M | 0.25% | 89,396 | Common | SOLE |
| 21900C308 | CRMD | CorMedix, Inc. | $8.2M | 0.24% | 1,211,115 | Common | SOLE |
| 228903100 | AORT | Artivion, Inc | $8.1M | 0.24% | 221,122 | Common | SOLE |
| 125141101 | CECO | CECO Environmental Corp. | $8.0M | 0.24% | 135,032 | Common | SOLE |
| N3144W105 | XPRO | Expro Group Holdings N.V. | $7.9M | 0.23% | 454,600 | Common | SOLE |
| 88362T103 | THR | Thermon Group Hldgs Inc. | $7.8M | 0.23% | 154,700 | Common | SOLE |
| 55955D100 | MGNI | Magnite, Inc. | $7.7M | 0.23% | 647,600 | Common | SOLE |
| 533535100 | LINC | Lincoln EDL Svcs | $7.7M | 0.23% | 188,447 | Common | SOLE |
| M81873107 | RDWR | Radware, Ltd. | $7.5M | 0.22% | 286,700 | Common | SOLE |
| 651718504 | NPKI | NPK International, Inc. | $7.5M | 0.22% | 518,150 | Common | SOLE |
| 92846Q107 | COCO | The Vita Coco Co., Inc. | $7.5M | 0.22% | 156,108 | Common | SOLE |
| 02913V103 | APEI | American Public Education, Inc | $7.4M | 0.22% | 130,400 | Common | SOLE |
| 05614L209 | BW | Babcock & Wilcox Enterprises, | $7.3M | 0.22% | 500,200 | Common | SOLE |
| 535219109 | LIND | Lindblad Expeditions Holdings, | $6.6M | 0.19% | 378,721 | Common | SOLE |
| 918284100 | VSEC | VSE Corp. | $6.3M | 0.19% | 34,008 | Common | SOLE |
| 49926D109 | KN | Knowles Corp. | $6.0M | 0.18% | 234,200 | Common | SOLE |
| 336901103 | SRCE | 1st Source Corp. | $6.0M | 0.18% | 86,200 | Common | SOLE |
| 12618T105 | CRAI | CRA Int'l Inc. | $5.9M | 0.17% | 36,470 | Common | SOLE |
| 383082104 | GRC | The Gorman-Rupp Co. | $5.9M | 0.17% | 95,000 | Common | SOLE |
| 09075A108 | BVS | Bioventus, Inc. | $5.7M | 0.17% | 628,114 | Common | SOLE |
| 69318J100 | CNXN | PC Connection, Inc. | $5.6M | 0.17% | 96,200 | Common | SOLE |
| 447462102 | HURN | Huron Consulting Group, Inc. | $5.4M | 0.16% | 42,300 | Common | SOLE |
| 87357P100 | TCMD | Tactile Sys Technology, Inc. | $5.3M | 0.16% | 202,839 | Common | SOLE |
| 22266M104 | COUR | Coursera, Inc. | $4.8M | 0.14% | 821,800 | Common | SOLE |
| 092244102 | BRCB | Black Rock Coffee Bar, Inc. | $4.7M | 0.14% | 365,600 | Common | SOLE |
| 774515100 | RCKY | Rocky Brands, Inc. | $4.6M | 0.13% | 118,000 | Common | SOLE |
| 946760105 | CLMB | Climb Global Solutions, Inc. | $4.2M | 0.12% | 211,840 | Common | SOLE |
| 75704L104 | RDVT | Red Violet, Inc. | $3.6M | 0.11% | 104,700 | Common | SOLE |
| 78462F103 | SPY | SPDR S&P 500 ETF Trust | $1.5M | 0.05% | 2,374 | Common | NONE |
| 44332N106 | HTHT | H World Group Ltd. | $1.2M | 0.04% | 24,000 | Common | SOLE |
| 594918104 | MSFT | Microsoft Corp. | $986,503 | 0.03% | 2,665 | Common | NONE |
| 46625H100 | JPM | JP Morgan Chase & Company Inc. | $936,470 | 0.03% | 3,184 | Common | NONE |
| 037833100 | AAPL | Apple, Inc. | $896,160 | 0.03% | 3,531 | Common | NONE |
| 36118L106 | FUTU | Futu Holdings Ltd. | $615,420 | 0.02% | 4,500 | Common | SOLE |
| 478160104 | JNJ | Johnson & Johnson | $560,631 | 0.02% | 2,294 | Common | NONE |
| 02079k305 | — | Alphabet, Inc. Cl A | $546,403 | 0.02% | 1,900 | Common | NONE |
| 00108J109 | ACMR | ACM Research, Inc. Class A | $511,550 | 0.02% | 13,000 | Common | SOLE |
| 02079k107 | — | Alphabet, Inc. Cl C | $464,713 | 0.01% | 1,620 | Common | NONE |
| 358054104 | FRSH | Freshworks, Inc. | $463,733 | 0.01% | 57,750 | Common | NONE |
| 89417E109 | TRV | The Travelers Co., Inc. | $461,440 | 0.01% | 1,582 | Common | NONE |
| 031162100 | AMGN | Amgen, Inc. | $364,443 | 0.01% | 1,036 | Common | NONE |
| 94724R108 | WEAV | Weave Communications, Inc. | $336,475 | 0.01% | 72,830 | Common | NONE |
| 57636Q104 | MA | Mastercard, Inc. | $330,641 | 0.01% | 662 | Common | NONE |
| 761152107 | RMD | Resmed Inc. | $325,496 | 0.01% | 1,450 | Common | NONE |
| 651639106 | NEM | Newmont Mining | $311,182 | 0.01% | 2,875 | Common | NONE |
| 064058100 | BK | Bank of New York Mellon Corp. | $297,802 | 0.01% | 2,510 | Common | NONE |
| 78463V107 | GLD | SPDR Gold Shares ETF | $290,446 | 0.01% | 675 | Common | NONE |
| 149123101 | CAT | Caterpillar, Inc. | $289,008 | 0.01% | 408 | Common | NONE |
| g4690m101 | — | IBEX Ltd. | $273,564 | 0.01% | 10,200 | Common | SOLE |
| 931142103 | WMT | Wal Mart Stores Inc. | $265,632 | 0.01% | 2,137 | Common | NONE |
| 580135101 | MCD | McDonald's Corporation | $265,615 | 0.01% | 855 | Common | NONE |
| 949746804 | WFC 7.5 PERP L | Wells Fargo Co New Perp Pfd | $259,875 | 0.01% | 225 | Common | NONE |
| 595112103 | MU | Micron Technology | $236,488 | 0.01% | 700 | Common | SOLE |
| 30231G102 | XOM | Exxon Mobil Corp. | $221,067 | 0.01% | 1,303 | Common | NONE |
| 001055102 | AFL | Aflac Inc. | $219,420 | 0.01% | 2,000 | Common | NONE |
| 35671D857 | FCX | Freeport Mcmoran Copper & Gold | $211,048 | 0.01% | 3,590 | Common | NONE |
| 58933Y105 | MRK | Merck & Co. | $208,102 | 0.01% | 1,730 | Common | NONE |
| 98401A106 | — | Xenacare Hldgs, Inc. | $0 | — | 140,000 | Common | NONE |
Source: SEC EDGAR · raw 13F holdings as filed. The Class column shows the option type when reported (Put/Call) or Common when the issuer's equity is held directly. 13F discloses long positions only.