OBERWEIS ASSET MANAGEMENT INC/
Securities ▲▼ | Shares | Value ($K) | ||||
|---|---|---|---|---|---|---|
Q4 2025 ▲▼ | Q1 2026 ▲▼ | Change ▲▼ | Q4 2025 ▲▼ | Q1 2026 ▲▼ | Change ▲▼ | |
| Applied Optoelectronics Inc. | 2,039,641 | 2,349,969 | +310,328 | 71,101,885 | 198,783,878 | +127,681,993 |
| Lumentum Hldgs, Inc. | 0 | 266,222 | +266,222 | 0 | 187,090,173 | +187,090,173 |
| DigitalOcean Holdings, Inc. | 778,830 | 927,505 | +148,675 | 37,477,300 | 79,561,379 | +42,084,079 |
| Dana Inc. | 796,500 | 1,611,500 | +815,000 | 18,924,840 | 54,226,975 | +35,302,135 |
| Fastly, Inc. | 689,800 | 1,071,022 | +381,222 | 7,022,164 | 31,123,899 | +24,101,735 |
| Ultra Clean Holdings | 0 | 640,476 | +640,476 | 0 | 39,824,798 | +39,824,798 |
| Nova Ltd. | 0 | 137,955 | +137,955 | 0 | 59,911,097 | +59,911,097 |
| Leonardo DRS, Inc. | 0 | 449,500 | +449,500 | 0 | 20,011,740 | +20,011,740 |
| Indivior Plc | 0 | 653,413 | +653,413 | 0 | 19,916,028 | +19,916,028 |
| Chime Financial Inc. | 0 | 1,035,530 | +1,035,530 | 0 | 19,395,477 | +19,395,477 |
| Hinge Health, Inc. | 0 | 465,766 | +465,766 | 0 | 17,959,937 | +17,959,937 |
| Macom Technology Solutions | 0 | 215,886 | +215,886 | 0 | 47,941,804 | +47,941,804 |
| Envista Holdings Corp. | 0 | 665,400 | +665,400 | 0 | 16,881,198 | +16,881,198 |
| Shake Shack, Inc. | 0 | 187,570 | +187,570 | 0 | 16,594,318 | +16,594,318 |
| Everus Construction Group | 259,800 | 326,533 | +66,733 | 22,228,488 | 38,550,486 | +16,321,998 |
| BrightSpring Health Services | 908,000 | 1,158,970 | +250,970 | 34,004,600 | 49,383,712 | +15,379,112 |
| Clean Harbors, Inc. | 116,870 | 144,355 | +27,485 | 27,403,678 | 41,390,909 | +13,987,231 |
| Arlo Technologies, Inc. | 0 | 982,300 | +982,300 | 0 | 13,978,129 | +13,978,129 |
| Solaris Energy Infrastructur | 0 | 531,889 | +531,889 | 0 | 30,057,047 | +30,057,047 |
| Moog Inc. - A | 0 | 44,910 | +44,910 | 0 | 13,142,462 | +13,142,462 |
| Core Natural Resources, Inc. | 178,400 | 269,800 | +91,400 | 15,790,184 | 28,256,154 | +12,465,970 |
| A10 Networks, Inc. | 0 | 504,300 | +504,300 | 0 | 11,659,416 | +11,659,416 |
| Lattice Semiconductor Corporat | 0 | 374,436 | +374,436 | 0 | 34,732,683 | +34,732,683 |
| Seacoast Bkg Corp. | 0 | 378,866 | +378,866 | 0 | 11,475,851 | +11,475,851 |
| Carpenter Technology Corp. | 82,611 | 94,433 | +11,822 | 26,009,318 | 37,220,897 | +11,211,579 |
| Federal Signal Corp. | 166,500 | 267,634 | +101,134 | 18,080,235 | 28,941,941 | +10,861,706 |
| Viavi Solutions, Inc. | 0 | 593,200 | +593,200 | 0 | 19,741,696 | +19,741,696 |
| Camtek, Ltd. | 218,880 | 222,780 | +3,900 | 23,276,794 | 33,775,676 | +10,498,882 |
| FirstCash Holdings, Inc | 131,300 | 165,665 | +34,365 | 20,926,594 | 31,145,020 | +10,218,426 |
| Globus Medical, Inc.-A | 270,000 | 392,200 | +122,200 | 23,573,700 | 33,791,952 | +10,218,252 |
| Amprius Technologies, Inc. | 0 | 585,000 | +585,000 | 0 | 9,863,100 | +9,863,100 |
| Silicon Motion Techn ADR | 0 | 282,550 | +282,550 | 0 | 31,727,540 | +31,727,540 |
| Matador Resources Company | 0 | 312,700 | +312,700 | 0 | 19,756,386 | +19,756,386 |
| Remitly Global, Inc. | 0 | 1,454,300 | +1,454,300 | 0 | 22,788,881 | +22,788,881 |
| Ameris Bancorp | 156,400 | 263,500 | +107,100 | 11,615,828 | 20,550,365 | +8,934,537 |
| Arcutis Biotherapeutics, Inc. | 808,400 | 1,365,941 | +557,541 | 23,475,936 | 32,181,570 | +8,705,634 |
| Littelfuse, Inc. | 0 | 71,800 | +71,800 | 0 | 24,365,330 | +24,365,330 |
| Argan, Inc | 32,971 | 33,322 | +351 | 10,330,566 | 18,148,603 | +7,818,037 |
| Diodes, Inc. | 151,900 | 224,300 | +72,400 | 7,494,746 | 15,310,718 | +7,815,972 |
| Thermon Group Hldgs Inc. | 0 | 154,700 | +154,700 | 0 | 7,796,880 | +7,796,880 |
| Advanced Energy Industry, Inc. | 39,700 | 49,183 | +9,483 | 8,311,989 | 15,871,846 | +7,559,857 |
| Phibro Animal Health Corp | 0 | 277,100 | +277,100 | 0 | 15,326,401 | +15,326,401 |
| American Public Education, Inc | 0 | 130,400 | +130,400 | 0 | 7,417,152 | +7,417,152 |
| LivaNova Plc | 0 | 321,900 | +321,900 | 0 | 20,459,964 | +20,459,964 |
| Babcock & Wilcox Enterprises, | 0 | 500,200 | +500,200 | 0 | 7,347,938 | +7,347,938 |
| nLIGHT Inc. | 0 | 363,010 | +363,010 | 0 | 20,698,830 | +20,698,830 |
| LeMaitre Vascular, Inc. | 0 | 148,601 | +148,601 | 0 | 16,222,819 | +16,222,819 |
| Halozyme Therapeutics, Inc. | 117,580 | 219,930 | +102,350 | 7,913,134 | 14,214,076 | +6,300,942 |
| Magnolia Oil & Gas Corp. | 0 | 454,466 | +454,466 | 0 | 14,347,492 | +14,347,492 |
| Knowles Corp. | 0 | 234,200 | +234,200 | 0 | 6,014,256 | +6,014,256 |
| Catalyst Pharmaceuticals, Inc. | 586,970 | 780,570 | +193,600 | 13,699,880 | 19,326,913 | +5,627,033 |
| PC Connection, Inc. | 0 | 96,200 | +96,200 | 0 | 5,623,852 | +5,623,852 |
| Dutch Bros., Inc. | 404,500 | 598,493 | +193,993 | 24,763,490 | 30,319,655 | +5,556,165 |
| Merit Medical System Inc | 0 | 424,209 | +424,209 | 0 | 29,240,726 | +29,240,726 |
| ProPetro Holding Corp. | 0 | 965,500 | +965,500 | 0 | 13,912,855 | +13,912,855 |
| Arcosa, Inc. | 221,600 | 267,700 | +46,100 | 23,560,512 | 28,413,678 | +4,853,166 |
| Black Rock Coffee Bar, Inc. | 0 | 365,600 | +365,600 | 0 | 4,723,552 | +4,723,552 |
| American Superconductor | 835,900 | 849,900 | +14,000 | 24,057,202 | 28,769,115 | +4,711,913 |
| SharkNinja, Inc. | 0 | 599,970 | +599,970 | 0 | 63,536,823 | +63,536,823 |
| Rocky Brands, Inc. | 0 | 118,000 | +118,000 | 0 | 4,568,960 | +4,568,960 |
| Tutor Perini Corp. | 0 | 393,900 | +393,900 | 0 | 30,405,141 | +30,405,141 |
| Fabrinet | 25,200 | 30,263 | +5,063 | 11,473,056 | 15,782,760 | +4,309,704 |
| AAR Corp. | 272,700 | 245,125 | -27,575 | 22,576,833 | 26,831,383 | +4,254,550 |
| Blue Bird Corporation | 382,638 | 389,238 | +6,600 | 17,983,986 | 22,104,826 | +4,120,840 |
| EZCorp, Inc. | 627,900 | 639,400 | +11,500 | 12,193,818 | 16,227,972 | +4,034,154 |
| Precision Drilling Corp. | 0 | 112,600 | +112,600 | 0 | 11,079,840 | +11,079,840 |
| Interdigital, Inc. | 0 | 42,645 | +42,645 | 0 | 12,878,790 | +12,878,790 |
| Rush Street Interactive, Inc. | 0 | 1,434,560 | +1,434,560 | 0 | 31,201,680 | +31,201,680 |
| Nicolet Bankshares, Inc. | 0 | 74,800 | +74,800 | 0 | 11,116,776 | +11,116,776 |
| SiTime Corporation | 0 | 119,281 | +119,281 | 0 | 41,193,693 | +41,193,693 |
| Eton Pharmaceuticals, Inc. | 431,300 | 439,300 | +8,000 | 7,293,283 | 10,841,924 | +3,548,641 |
| Flowserve Corporation | 409,941 | 434,681 | +24,740 | 28,441,733 | 31,953,415 | +3,511,682 |
| Primoris Services Corp. | 0 | 166,100 | +166,100 | 0 | 23,758,944 | +23,758,944 |
| Calix, Inc. | 244,600 | 335,030 | +90,430 | 12,946,678 | 16,413,120 | +3,466,442 |
| Zurn Elkay Water Solutions Cor | 0 | 352,183 | +352,183 | 0 | 15,791,886 | +15,791,886 |
| Grand Canyon Education, Inc. | 99,800 | 116,900 | +17,100 | 16,597,738 | 19,876,507 | +3,278,769 |
| Life Time Holdings, Inc. | 0 | 1,160,500 | +1,160,500 | 0 | 31,263,870 | +31,263,870 |
| Pediatrix Medical Group, Inc. | 0 | 701,087 | +701,087 | 0 | 14,996,251 | +14,996,251 |
| Powell Industries Inc. | 0 | 34,157 | +34,157 | 0 | 18,481,670 | +18,481,670 |
| Ducommun Inc. | 98,100 | 99,900 | +1,800 | 9,332,253 | 12,187,800 | +2,855,547 |
| Benchmark Electronics Inc | 198,300 | 201,900 | +3,600 | 8,479,308 | 11,318,514 | +2,839,206 |
| Rambus, Inc | 0 | 526,316 | +526,316 | 0 | 45,278,965 | +45,278,965 |
| Frontdoor, Inc. | 610,860 | 717,960 | +107,100 | 35,240,513 | 37,951,366 | +2,710,853 |
| Liquidia Corp. | 0 | 372,100 | +372,100 | 0 | 14,043,054 | +14,043,054 |
| Vistance Networks, Inc. | 0 | 1,092,012 | +1,092,012 | 0 | 19,874,618 | +19,874,618 |
| Kiniksa Pharmaceuticals, Ltd. | 0 | 318,634 | +318,634 | 0 | 15,342,227 | +15,342,227 |
| Osi Systems, Inc. | 0 | 106,593 | +106,593 | 0 | 28,301,507 | +28,301,507 |
| Evolv Technologies Holdings | 1,077,900 | 1,671,949 | +594,049 | 7,717,764 | 10,115,291 | +2,397,527 |
| ICU Medical, Inc. | 168,040 | 203,710 | +35,670 | 23,974,267 | 26,309,147 | +2,334,880 |
| Assurant, Inc. | 83,000 | 102,300 | +19,300 | 19,990,550 | 22,281,963 | +2,291,413 |
| Alighnment Healthcare, Inc. | 747,500 | 966,600 | +219,100 | 14,763,125 | 17,031,492 | +2,268,367 |
| Skyward Specialty Ins Group | 0 | 327,100 | +327,100 | 0 | 14,287,728 | +14,287,728 |
| Lindblad Expeditions Holdings, | 0 | 378,721 | +378,721 | 0 | 6,551,873 | +6,551,873 |
| ANI Pharmaceuticals, Inc. | 188,830 | 221,386 | +32,556 | 14,906,240 | 17,024,583 | +2,118,343 |
| Expro Group Holdings N.V. | 446,300 | 454,600 | +8,300 | 5,958,105 | 7,914,586 | +1,956,481 |
| The Gorman-Rupp Co. | 0 | 95,000 | +95,000 | 0 | 5,902,350 | +5,902,350 |
| NPK International, Inc. | 0 | 518,150 | +518,150 | 0 | 7,507,994 | +7,507,994 |
| SPX Technologies, Inc. | 0 | 83,441 | +83,441 | 0 | 16,683,194 | +16,683,194 |
| OneSpaWorld Holdings Limited | 0 | 485,690 | +485,690 | 0 | 11,146,586 | +11,146,586 |
| Super Group SGHC Ltd. | 0 | 1,514,400 | +1,514,400 | 0 | 16,355,520 | +16,355,520 |