OBERWEIS ASSET MANAGEMENT INC/
Securities ▲▼ | Shares | Value ($K) | |||||
|---|---|---|---|---|---|---|---|
Q4 2025 ▲▼ | Q1 2026 ▲▼ | Change ▲▼ | Q4 2025 ▲▼ | Q1 2026 ▲▼ | Weight (%) ▲▼ | Change ▲▼ | |
| Applied Optoelectronics Inc.(AAOI) | 2,039,641 | 2,349,969 | +310,328 | 71,101,885 | 198,783,878 | 5.87% | +127,681,993 |
| Lumentum Hldgs, Inc.(LITE) | 280,930 | 266,222 | -14,708 | 103,547,989 | 187,090,173 | 5.53% | +83,542,184 |
| DigitalOcean Holdings, Inc.(DOCN) | 778,830 | 927,505 | +148,675 | 37,477,300 | 79,561,379 | 2.35% | +42,084,079 |
| Dana Inc.(DAN) | 796,500 | 1,611,500 | +815,000 | 18,924,840 | 54,226,975 | 1.60% | +35,302,135 |
| Fastly, Inc.(FSLY) | 689,800 | 1,071,022 | +381,222 | 7,022,164 | 31,123,899 | 0.92% | +24,101,735 |
| Ultra Clean Holdings(UCTT) | 628,500 | 640,476 | +11,976 | 15,919,905 | 39,824,798 | 1.18% | +23,904,893 |
| Nova Ltd.(NVMI) | 113,285 | 137,955 | +24,670 | 37,201,661 | 59,911,097 | 1.77% | +22,709,436 |
| Leonardo DRS, Inc.(DRS) | 0 | 449,500 | +449,500 | 0 | 20,011,740 | 0.59% | +20,011,740 |
| Indivior Plc(INDV) | 0 | 653,413 | +653,413 | 0 | 19,916,028 | 0.59% | +19,916,028 |
| Chime Financial Inc.(CHYM) | 0 | 1,035,530 | +1,035,530 | 0 | 19,395,477 | 0.57% | +19,395,477 |
| Hinge Health, Inc.(HNGE) | 0 | 465,766 | +465,766 | 0 | 17,959,937 | 0.53% | +17,959,937 |
| Macom Technology Solutions(MTSI) | 178,960 | 215,886 | +36,926 | 30,652,269 | 47,941,804 | 1.42% | +17,289,535 |
| Envista Holdings Corp.(NVST) | 0 | 665,400 | +665,400 | 0 | 16,881,198 | 0.50% | +16,881,198 |
| Shake Shack, Inc.(SHAK) | 0 | 187,570 | +187,570 | 0 | 16,594,318 | 0.49% | +16,594,318 |
| Everus Construction Group(ECG) | 259,800 | 326,533 | +66,733 | 22,228,488 | 38,550,486 | 1.14% | +16,321,998 |
| BrightSpring Health Services(BTSG) | 908,000 | 1,158,970 | +250,970 | 34,004,600 | 49,383,712 | 1.46% | +15,379,112 |
| Clean Harbors, Inc.(CLH) | 116,870 | 144,355 | +27,485 | 27,403,678 | 41,390,909 | 1.22% | +13,987,231 |
| Arlo Technologies, Inc.(ARLO) | 0 | 982,300 | +982,300 | 0 | 13,978,129 | 0.41% | +13,978,129 |
| Solaris Energy Infrastructur(SEI) | 366,900 | 531,889 | +164,989 | 16,866,393 | 30,057,047 | 0.89% | +13,190,654 |
| Moog Inc. - A(MOG-A) | 0 | 44,910 | +44,910 | 0 | 13,142,462 | 0.39% | +13,142,462 |
| Core Natural Resources, Inc.(CNR) | 178,400 | 269,800 | +91,400 | 15,790,184 | 28,256,154 | 0.83% | +12,465,970 |
| A10 Networks, Inc. | 0 | 504,300 | +504,300 | 0 | 11,659,416 | 0.34% | +11,659,416 |
| Lattice Semiconductor Corporat(LSCC) | 314,636 | 374,436 | +59,800 | 23,150,917 | 34,732,683 | 1.03% | +11,581,766 |
| Seacoast Bkg Corp.(SBCF) | 0 | 378,866 | +378,866 | 0 | 11,475,851 | 0.34% | +11,475,851 |
| Carpenter Technology Corp.(CRS) | 82,611 | 94,433 | +11,822 | 26,009,318 | 37,220,897 | 1.10% | +11,211,579 |
| Federal Signal Corp.(FSS) | 166,500 | 267,634 | +101,134 | 18,080,235 | 28,941,941 | 0.85% | +10,861,706 |
| Viavi Solutions, Inc.(VIAV) | 508,100 | 593,200 | +85,100 | 9,054,342 | 19,741,696 | 0.58% | +10,687,354 |
| Camtek, Ltd.(CAMT) | 218,880 | 222,780 | +3,900 | 23,276,794 | 33,775,676 | 1.00% | +10,498,882 |
| FirstCash Holdings, Inc(FCFS) | 131,300 | 165,665 | +34,365 | 20,926,594 | 31,145,020 | 0.92% | +10,218,426 |
| Globus Medical, Inc.-A(GMED) | 270,000 | 392,200 | +122,200 | 23,573,700 | 33,791,952 | 1.00% | +10,218,252 |
| Amprius Technologies, Inc.(AMPX) | 0 | 585,000 | +585,000 | 0 | 9,863,100 | 0.29% | +9,863,100 |
| Silicon Motion Techn ADR(SIMO) | 236,300 | 282,550 | +46,250 | 21,905,010 | 31,727,540 | 0.94% | +9,822,530 |
| Matador Resources Company(MTDR) | 253,900 | 312,700 | +58,800 | 10,775,516 | 19,756,386 | 0.58% | +8,980,870 |
| Remitly Global, Inc.(RELY) | 1,002,800 | 1,454,300 | +451,500 | 13,838,640 | 22,788,881 | 0.67% | +8,950,241 |
| Ameris Bancorp(ABCB) | 156,400 | 263,500 | +107,100 | 11,615,828 | 20,550,365 | 0.61% | +8,934,537 |
| Arcutis Biotherapeutics, Inc.(ARQT) | 808,400 | 1,365,941 | +557,541 | 23,475,936 | 32,181,570 | 0.95% | +8,705,634 |
| Littelfuse, Inc.(LFUS) | 62,300 | 71,800 | +9,500 | 15,756,916 | 24,365,330 | 0.72% | +8,608,414 |
| Argan, Inc | 32,971 | 33,322 | +351 | 10,330,566 | 18,148,603 | 0.54% | +7,818,037 |
| Diodes, Inc.(DIOD) | 151,900 | 224,300 | +72,400 | 7,494,746 | 15,310,718 | 0.45% | +7,815,972 |
| Thermon Group Hldgs Inc. | 0 | 154,700 | +154,700 | 0 | 7,796,880 | 0.23% | +7,796,880 |
| Advanced Energy Industry, Inc. | 39,700 | 49,183 | +9,483 | 8,311,989 | 15,871,846 | 0.47% | +7,559,857 |
| Phibro Animal Health Corp(PAHC) | 209,800 | 277,100 | +67,300 | 7,838,128 | 15,326,401 | 0.45% | +7,488,273 |
| American Public Education, Inc(APEI) | 0 | 130,400 | +130,400 | 0 | 7,417,152 | 0.22% | +7,417,152 |
| LivaNova Plc(LIVN) | 212,300 | 321,900 | +109,600 | 13,062,819 | 20,459,964 | 0.60% | +7,397,145 |
| Babcock & Wilcox Enterprises,(BW) | 0 | 500,200 | +500,200 | 0 | 7,347,938 | 0.22% | +7,347,938 |
| nLIGHT Inc.(LASR) | 356,400 | 363,010 | +6,610 | 13,368,564 | 20,698,830 | 0.61% | +7,330,266 |
| LeMaitre Vascular, Inc.(LMAT) | 116,301 | 148,601 | +32,300 | 9,431,979 | 16,222,819 | 0.48% | +6,790,840 |
| Halozyme Therapeutics, Inc.(HALO) | 117,580 | 219,930 | +102,350 | 7,913,134 | 14,214,076 | 0.42% | +6,300,942 |
| Magnolia Oil & Gas Corp.(MGY) | 376,300 | 454,466 | +78,166 | 8,237,207 | 14,347,492 | 0.42% | +6,110,285 |
| Knowles Corp.(KN) | 0 | 234,200 | +234,200 | 0 | 6,014,256 | 0.18% | +6,014,256 |
| Catalyst Pharmaceuticals, Inc.(CPRX) | 586,970 | 780,570 | +193,600 | 13,699,880 | 19,326,913 | 0.57% | +5,627,033 |
| PC Connection, Inc.(CNXN) | 0 | 96,200 | +96,200 | 0 | 5,623,852 | 0.17% | +5,623,852 |
| Dutch Bros., Inc.(BROS) | 404,500 | 598,493 | +193,993 | 24,763,490 | 30,319,655 | 0.90% | +5,556,165 |
| Merit Medical System Inc(MMSI) | 268,760 | 424,209 | +155,449 | 23,688,506 | 29,240,726 | 0.86% | +5,552,220 |
| ProPetro Holding Corp.(PUMP) | 947,900 | 965,500 | +17,600 | 9,014,529 | 13,912,855 | 0.41% | +4,898,326 |
| Arcosa, Inc. | 221,600 | 267,700 | +46,100 | 23,560,512 | 28,413,678 | 0.84% | +4,853,166 |
| Black Rock Coffee Bar, Inc. | 0 | 365,600 | +365,600 | 0 | 4,723,552 | 0.14% | +4,723,552 |
| American Superconductor | 835,900 | 849,900 | +14,000 | 24,057,202 | 28,769,115 | 0.85% | +4,711,913 |
| SharkNinja, Inc.(SN) | 526,310 | 599,970 | +73,660 | 58,894,089 | 63,536,823 | 1.88% | +4,642,734 |
| Rocky Brands, Inc. | 0 | 118,000 | +118,000 | 0 | 4,568,960 | 0.13% | +4,568,960 |
| Tutor Perini Corp.(TPC) | 387,200 | 393,900 | +6,700 | 25,950,144 | 30,405,141 | 0.90% | +4,454,997 |
| Fabrinet(FN) | 25,200 | 30,263 | +5,063 | 11,473,056 | 15,782,760 | 0.47% | +4,309,704 |
| AAR Corp. | 272,700 | 245,125 | -27,575 | 22,576,833 | 26,831,383 | 0.79% | +4,254,550 |
| Blue Bird Corporation | 382,638 | 389,238 | +6,600 | 17,983,986 | 22,104,826 | 0.65% | +4,120,840 |
| EZCorp, Inc.(EZPW) | 627,900 | 639,400 | +11,500 | 12,193,818 | 16,227,972 | 0.48% | +4,034,154 |
| Precision Drilling Corp.(PDS) | 99,500 | 112,600 | +13,100 | 7,152,060 | 11,079,840 | 0.33% | +3,927,780 |
| Interdigital, Inc.(IDCC) | 28,300 | 42,645 | +14,345 | 9,010,154 | 12,878,790 | 0.38% | +3,868,636 |
| Rush Street Interactive, Inc.(RSI) | 1,411,710 | 1,434,560 | +22,850 | 27,429,525 | 31,201,680 | 0.92% | +3,772,155 |
| Nicolet Bankshares, Inc. | 61,700 | 74,800 | +13,100 | 7,484,210 | 11,116,776 | 0.33% | +3,632,566 |
| SiTime Corporation(SITM) | 106,396 | 119,281 | +12,885 | 37,578,003 | 41,193,693 | 1.22% | +3,615,690 |
| Eton Pharmaceuticals, Inc.(ETON) | 431,300 | 439,300 | +8,000 | 7,293,283 | 10,841,924 | 0.32% | +3,548,641 |
| Flowserve Corporation(FLS) | 409,941 | 434,681 | +24,740 | 28,441,733 | 31,953,415 | 0.94% | +3,511,682 |
| Primoris Services Corp.(PRIM) | 163,300 | 166,100 | +2,800 | 20,272,062 | 23,758,944 | 0.70% | +3,486,882 |
| Calix, Inc.(CALX) | 244,600 | 335,030 | +90,430 | 12,946,678 | 16,413,120 | 0.48% | +3,466,442 |
| Zurn Elkay Water Solutions Cor(ZWS) | 266,000 | 352,183 | +86,183 | 12,366,340 | 15,791,886 | 0.47% | +3,425,546 |
| Grand Canyon Education, Inc.(LOPE) | 99,800 | 116,900 | +17,100 | 16,597,738 | 19,876,507 | 0.59% | +3,278,769 |
| Life Time Holdings, Inc.(LTH) | 1,059,300 | 1,160,500 | +101,200 | 28,156,194 | 31,263,870 | 0.92% | +3,107,676 |
| Pediatrix Medical Group, Inc.(MD) | 559,987 | 701,087 | +141,100 | 11,978,122 | 14,996,251 | 0.44% | +3,018,129 |
| Powell Industries Inc.(POWL) | 48,700 | 34,157 | -14,543 | 15,524,586 | 18,481,670 | 0.55% | +2,957,084 |
| Ducommun Inc.(DCO) | 98,100 | 99,900 | +1,800 | 9,332,253 | 12,187,800 | 0.36% | +2,855,547 |
| Benchmark Electronics Inc(BHE) | 198,300 | 201,900 | +3,600 | 8,479,308 | 11,318,514 | 0.33% | +2,839,206 |
| Rambus, Inc(RMBS) | 462,100 | 526,316 | +64,216 | 42,462,369 | 45,278,965 | 1.34% | +2,816,596 |
| Frontdoor, Inc.(FTDR) | 610,860 | 717,960 | +107,100 | 35,240,513 | 37,951,366 | 1.12% | +2,710,853 |
| Liquidia Corp.(LQDA) | 329,200 | 372,100 | +42,900 | 11,354,108 | 14,043,054 | 0.41% | +2,688,946 |
| Vistance Networks, Inc.(VISN) | 960,912 | 1,092,012 | +131,100 | 17,421,335 | 19,874,618 | 0.59% | +2,453,283 |
| Kiniksa Pharmaceuticals, Ltd.(KNSA) | 312,800 | 318,634 | +5,834 | 12,903,000 | 15,342,227 | 0.45% | +2,439,227 |
| Osi Systems, Inc.(OSIS) | 101,400 | 106,593 | +5,193 | 25,863,084 | 28,301,507 | 0.84% | +2,438,423 |
| Evolv Technologies Holdings(EVLV) | 1,077,900 | 1,671,949 | +594,049 | 7,717,764 | 10,115,291 | 0.30% | +2,397,527 |
| ICU Medical, Inc.(ICUI) | 168,040 | 203,710 | +35,670 | 23,974,267 | 26,309,147 | 0.78% | +2,334,880 |
| Assurant, Inc.(AIZ) | 83,000 | 102,300 | +19,300 | 19,990,550 | 22,281,963 | 0.66% | +2,291,413 |
| Alighnment Healthcare, Inc.(ALHC) | 747,500 | 966,600 | +219,100 | 14,763,125 | 17,031,492 | 0.50% | +2,268,367 |
| Skyward Specialty Ins Group(SKWD) | 237,500 | 327,100 | +89,600 | 12,138,625 | 14,287,728 | 0.42% | +2,149,103 |
| Lindblad Expeditions Holdings,(LIND) | 306,800 | 378,721 | +71,921 | 4,424,056 | 6,551,873 | 0.19% | +2,127,817 |
| ANI Pharmaceuticals, Inc.(ANIP) | 188,830 | 221,386 | +32,556 | 14,906,240 | 17,024,583 | 0.50% | +2,118,343 |
| Expro Group Holdings N.V. | 446,300 | 454,600 | +8,300 | 5,958,105 | 7,914,586 | 0.23% | +1,956,481 |
| The Gorman-Rupp Co.(GRC) | 93,200 | 95,000 | +1,800 | 4,450,300 | 5,902,350 | 0.17% | +1,452,050 |
| NPK International, Inc.(NPKI) | 508,750 | 518,150 | +9,400 | 6,064,300 | 7,507,994 | 0.22% | +1,443,694 |
| SPX Technologies, Inc. | 76,900 | 83,441 | +6,541 | 15,384,614 | 16,683,194 | 0.49% | +1,298,580 |
| OneSpaWorld Holdings Limited COM | 476,890 | 485,690 | +8,800 | 9,890,699 | 11,146,586 | 0.33% | +1,255,887 |
| Super Group SGHC Ltd. ORD SHS | 1,268,500 | 1,514,400 | +245,900 | 15,158,575 | 16,355,520 | 0.48% | +1,196,945 |