Fund Holdings — OBERWEIS ASSET MANAGEMENT INC/

Total Portfolio Value:
$3.39B
Total Bought:
$995.68M
Total Sold:
$386.39M
Net Transaction:
+$609.29M
Notable People:
James Walter Oberweis
Securities
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SharesValue
Q4 2025
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Q1 2026
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Change
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Q4 2025
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Q1 2026
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Weight (%)
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Change
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Applied Optoelectronics, Inc.(AAOI)2,039,6412,349,969+310,328$71.10M$198.78M5.87%+$127.68M
Lumentum Holdings Inc.(LITE)280,930266,222-14,708$103.55M$187.09M5.53%+$83.54M
Credo Technology Group
ORDINARY SHARES
675,3881,021,968+346,580$97.18M$95.93M2.83%-$1.25M
DigitalOcean Holdings, Inc.(DOCN)778,830927,505+148,675$37.48M$79.56M2.35%+$42.08M
SharkNinja, Inc.(SN)526,310599,970+73,660$58.89M$63.54M1.88%+$4.64M
Nova Ltd.(NVMI)113,285137,955+24,670$37.20M$59.91M1.77%+$22.71M
Dana Incorporated(DAN)796,5001,611,500+815,000$18.92M$54.23M1.60%+$35.30M
BrightSpring Health Services, Inc.(BTSG)908,0001,158,970+250,970$34.00M$49.38M1.46%+$15.38M
MACOM Technology Solutions Holdings, Inc.(MTSI)178,960215,886+36,926$30.65M$47.94M1.42%+$17.29M
Rambus Inc.(RMBS)462,100526,316+64,216$42.46M$45.28M1.34%+$2.82M
Clean Harbors, Inc.(CLH)116,870144,355+27,485$27.40M$41.39M1.22%+$13.99M
SiTime Corporation(SITM)106,396119,281+12,885$37.58M$41.19M1.22%+$3.62M
Ultra Clean Holdings, Inc.(UCTT)628,500640,476+11,976$15.92M$39.82M1.18%+$23.90M
Everus Construction Group, Inc.(ECG)259,800326,533+66,733$22.23M$38.55M1.14%+$16.32M
Frontdoor, Inc.(FTDR)610,860717,960+107,100$35.24M$37.95M1.12%+$2.71M
Carpenter Technology Corporation(CRS)82,61194,433+11,822$26.01M$37.22M1.10%+$11.21M
SkyWest, Inc.(SKYW)382,220392,499+10,279$38.38M$36.04M1.06%-$2.34M
Lattice Semiconductor Corporation(LSCC)314,636374,436+59,800$23.15M$34.73M1.03%+$11.58M
Globus Medical, Inc.(GMED)270,000392,200+122,200$23.57M$33.79M1.00%+$10.22M
Camtek Ltd.(CAMT)218,880222,780+3,900$23.28M$33.78M1.00%+$10.50M
Arcutis Biotherapeutics, Inc.(ARQT)808,4001,365,941+557,541$23.48M$32.18M0.95%+$8.71M
Flowserve Corporation(FLS)409,941434,681+24,740$28.44M$31.95M0.94%+$3.51M
Silicon Motion Technology Corporation(SIMO)236,300282,550+46,250$21.91M$31.73M0.94%+$9.82M
Life Time Group Holdings, Inc.(LTH)1,059,3001,160,500+101,200$28.16M$31.26M0.92%+$3.11M
Rush Street Interactive, Inc.(RSI)1,411,7101,434,560+22,850$27.43M$31.20M0.92%+$3.77M
FirstCash Holdings, Inc.(FCFS)131,300165,665+34,365$20.93M$31.15M0.92%+$10.22M
Fastly, Inc.(FSLY)689,8001,071,022+381,222$7.02M$31.12M0.92%+$24.10M
Tutor Perini Corporation(TPC)387,200393,900+6,700$25.95M$30.41M0.90%+$4.45M
Dutch Bros Inc.(BROS)404,500598,493+193,993$24.76M$30.32M0.90%+$5.56M
Solaris Energy Infrastructure, Inc.(SEI)366,900531,889+164,989$16.87M$30.06M0.89%+$13.19M
Merit Medical Systems, Inc.(MMSI)268,760424,209+155,449$23.69M$29.24M0.86%+$5.55M
Federal Signal Corporation(FSS)166,500267,634+101,134$18.08M$28.94M0.85%+$10.86M
American Superconductor835,900849,900+14,000$24.06M$28.77M0.85%+$4.71M
Mercury Systems, Inc.(MRCY)414,040391,023-23,017$30.23M$28.51M0.84%-$1.72M
Arcosa, Inc.221,600267,700+46,100$23.56M$28.41M0.84%+$4.85M
OSI Systems, Inc.(OSIS)101,400106,593+5,193$25.86M$28.30M0.84%+$2.44M
Core Natural Resources, Inc.(CNR)178,400269,800+91,400$15.79M$28.26M0.83%+$12.47M
Waystar Holding Corp.(WAY)840,6001,167,474+326,874$27.53M$28.15M0.83%+$618.1K
Encompass Health Corporation(EHC)358,971289,485-69,486$38.10M$28.00M0.83%-$10.10M
Veracyte, Inc.(VCYT)726,740839,834+113,094$30.60M$27.05M0.80%-$3.54M
AAR Corp.272,700245,125-27,575$22.58M$26.83M0.79%+$4.25M
ICU Medical, Inc.(ICUI)168,040203,710+35,670$23.97M$26.31M0.78%+$2.33M
Littelfuse, Inc.(LFUS)62,30071,800+9,500$15.76M$24.37M0.72%+$8.61M
Primoris Services Corporation(PRIM)163,300166,100+2,800$20.27M$23.76M0.70%+$3.49M
Remitly Global, Inc.(RELY)1,002,8001,454,300+451,500$13.84M$22.79M0.67%+$8.95M
Genpact Ltd.
SHS
521,602606,832+85,230$24.40M$22.60M0.67%-$1.80M
Assurant, Inc.(AIZ)83,000102,300+19,300$19.99M$22.28M0.66%+$2.29M
Blue Bird Corporation382,638389,238+6,600$17.98M$22.10M0.65%+$4.12M
Imax Corp.652,300577,139-75,161$24.11M$21.94M0.65%-$2.17M
Levi Strauss & Co.(LEVI)993,9001,167,300+173,400$20.61M$21.58M0.64%+$969.9K
Alphatec Holdings, Inc.(ATEC)1,000,4001,908,293+907,893$21.05M$20.76M0.61%-$286.2K
nLIGHT, Inc.(LASR)356,400363,010+6,610$13.37M$20.70M0.61%+$7.33M
National Vision Holdings, Inc.(EYE)784,500797,780+13,280$20.26M$20.66M0.61%+$406.7K
Ameris Bancorp(ABCB)156,400263,500+107,100$11.62M$20.55M0.61%+$8.93M
LivaNova PLC(LIVN)212,300321,900+109,600$13.06M$20.46M0.60%+$7.40M
Leonardo DRS, Inc.(DRS)0449,500+449,500$0$20.01M0.59%+$20.01M
Urban Outfitters, Inc.(URBN)286,400314,792+28,392$21.55M$19.94M0.59%-$1.61M
Indivior Pharmaceuticals, Inc.(INDV)0653,413+653,413$0$19.92M0.59%+$19.92M
Grand Canyon Education, Inc.(LOPE)99,800116,900+17,100$16.60M$19.88M0.59%+$3.28M
Vistance Networks, Inc.(VISN)960,9121,092,012+131,100$17.42M$19.87M0.59%+$2.45M
Matador Resources Company(MTDR)253,900312,700+58,800$10.78M$19.76M0.58%+$8.98M
Viavi Solutions Inc.(VIAV)508,100593,200+85,100$9.05M$19.74M0.58%+$10.69M
Chime Financial, Inc.(CHYM)01,035,530+1,035,530$0$19.40M0.57%+$19.40M
Pegasystems Inc.(PEGA)424,840455,290+30,450$25.37M$19.38M0.57%-$5.99M
Catalyst Pharmaceuticals, Inc.586,970780,570+193,600$13.70M$19.33M0.57%+$5.63M
Q2 Holdings, Inc.(QTWO)336,860394,629+57,769$24.31M$18.67M0.55%-$5.64M
Powell Industries, Inc.(POWL)48,70034,157-14,543$15.52M$18.48M0.55%+$2.96M
iRhythm Holdings, Inc.(IRTC)119,700156,004+36,304$21.24M$18.41M0.54%-$2.83M
Box, Inc.(BOX)652,320771,520+119,200$19.51M$18.24M0.54%-$1.27M
Argan, Inc32,97133,322+351$10.33M$18.15M0.54%+$7.82M
Hinge Health, Inc.(HNGE)0465,766+465,766$0$17.96M0.53%+$17.96M
The New York Times Company(NYT)302,700211,650-91,050$21.01M$17.72M0.52%-$3.29M
American Eagle Outfitters814,5001,044,900+230,400$21.48M$17.45M0.52%-$4.03M
Alignment Healthcare, Inc.(ALHC)747,500966,600+219,100$14.76M$17.03M0.50%+$2.27M
ANI Pharmaceuticals, Inc.(ANIP)188,830221,386+32,556$14.91M$17.02M0.50%+$2.12M
Envista Holdings Corporation(NVST)0665,400+665,400$0$16.88M0.50%+$16.88M
GeneDx Holdings Corp.(WGS)198,770261,370+62,600$25.85M$16.79M0.50%-$9.07M
SPX Technologies, Inc.76,90083,441+6,541$15.38M$16.68M0.49%+$1.30M
Shake Shack Inc.(SHAK)0187,570+187,570$0$16.59M0.49%+$16.59M
Calix, Inc.(CALX)244,600335,030+90,430$12.95M$16.41M0.48%+$3.47M
Super Group SGHC Ltd.
ORD SHS
1,268,5001,514,400+245,900$15.16M$16.36M0.48%+$1.20M
EZCORP, Inc.(EZPW)627,900639,400+11,500$12.19M$16.23M0.48%+$4.03M
LeMaitre Vascular, Inc.(LMAT)116,301148,601+32,300$9.43M$16.22M0.48%+$6.79M
Advanced Energy Industry, Inc.39,70049,183+9,483$8.31M$15.87M0.47%+$7.56M
Zurn Elkay Water Solutions Corporation(ZWS)266,000352,183+86,183$12.37M$15.79M0.47%+$3.43M
Fabrinet(FN)25,20030,263+5,063$11.47M$15.78M0.47%+$4.31M
Kiniksa Pharmaceuticals International, plc(KNSA)312,800318,634+5,834$12.90M$15.34M0.45%+$2.44M
Phibro Animal Health Corporation(PAHC)209,800277,100+67,300$7.84M$15.33M0.45%+$7.49M
Diodes Incorporated(DIOD)151,900224,300+72,400$7.49M$15.31M0.45%+$7.82M
Ambarella, Inc.(AMBA)617,860295,185-322,675$43.77M$15.19M0.45%-$28.57M
Pediatrix Medical Group, Inc.(MD)559,987701,087+141,100$11.98M$15.00M0.44%+$3.02M
Magnolia Oil & Gas Corporation(MGY)376,300454,466+78,166$8.24M$14.35M0.42%+$6.11M
Skyward Specialty Insurance Group, Inc.(SKWD)237,500327,100+89,600$12.14M$14.29M0.42%+$2.15M
Halozyme Therapeutics, Inc.(HALO)117,580219,930+102,350$7.91M$14.21M0.42%+$6.30M
Liquidia Corporation(LQDA)329,200372,100+42,900$11.35M$14.04M0.41%+$2.69M
Arlo Technologies, Inc.(ARLO)0982,300+982,300$0$13.98M0.41%+$13.98M
HealthEquity, Inc.(HQY)141,580166,641+25,061$12.97M$13.93M0.41%+$956.0K
ProPetro Holding Corp.(PUMP)947,900965,500+17,600$9.01M$13.91M0.41%+$4.90M
Zeta Global Holdings Corp.(ZETA)767,020871,060+104,040$15.61M$13.87M0.41%-$1.74M
Mirion Technologies, Inc.(MIR)607,800744,267+136,467$14.23M$13.84M0.41%-$398.8K
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OBERWEIS ASSET MANAGEMENT INC/ — 13F Holdings — Q1 2026 | TickerTrail