OBERWEIS ASSET MANAGEMENT INC/

13F filer, CIK 937886, LISLE, IL

OBERWEIS ASSET MANAGEMENT INC/ reported $2,121,356,727 across 196 holdings for the quarter ended 2024-12-31, in a 13F-HR filed 2025-02-14. Its ten largest share positions make up 17.9% of the portfolio.

Filed 2025-02-14 (acceptance time not in the bulk data set), ingested 2026-10-07 18:25:55 UTC13F-HR 0001213900-25-013939

Period: 2024-12-31
Reported value: $2.12B
Holdings: 196
Top 10 weight: 17.9%
New: 30
Sold out: 40

Largest buys vs the previous quarter

Security	Shares change	Approx. value
DORMnew	+179,720	$23.3M
RMBSnew	+409,400	$21.6M
ACAnew	+203,000	$19.6M
CARGnew	+500,000	$18.3M
GAPnew	+726,500	$17.2M

Ranked by the share change valued at this quarter's implied price (value over shares in the 13F). A position sold out is valued at the previous quarter's price, its last report.

Largest sells vs the previous quarter

Security	Shares change	Approx. value
TMDXexited	-168,690	-$26.5M
CROXexited	-152,900	-$22.1M
LNTHexited	-191,400	-$21M
TDWexited	-211,505	-$15.2M
IBPexited	-55,700	-$13.7M

Ranked by the share change valued at this quarter's implied price (value over shares in the 13F). A position sold out is valued at the previous quarter's price, its last report.

Holdings, Q4 2024

Share positions as resolved from 13F-HR 0001213900-25-013939, largest first. % of portfolio is the value over $2,121,356,727, the sum of the share positions whose value is usable for ratios (method).

Security	Shares	Value	% of portfolio	Change	Latest event	Timeline
CRDOCREDO TECHNOLOGY GROUP HOLDI	959,594	$64.5M	3.04%	+131,280		Timeline
ADMAADMA BIOLOGICS INC	3,342,560	$57.3M	2.7%	+435,480		Timeline
SNSHARKNINJA INC	499,290	$48.6M	2.29%	+37,100		Timeline
ZETAZETA GLOBAL HOLDINGS CORP	1,840,040	$33.1M	1.56%	+235,910		Timeline
SKYWSKYWEST INC	319,150	$32M	1.51%	+41,500		Timeline
EHCENCOMPASS HEALTH CORP	340,829	$31.5M	1.48%	+34,221		Timeline
DOCSDOXIMITY INC	573,100	$30.6M	1.44%	+110,000		Timeline
VCYTVERACYTE INC	748,720	$29.6M	1.4%	+32,800		Timeline
FLSFLOWSERVE CORP	468,590	$27M	1.27%	+58,628		Timeline
FTDRFRONTDOOR INC	467,500	$25.6M	1.2%	+56,100		Timeline
PSNPARSONS CORP DEL	267,470	$24.7M	1.16%	-250		Timeline
ICUIICU MED INC	156,680	$24.3M	1.15%	+26,180		Timeline
CLHCLEAN HARBORS INC	102,430	$23.6M	1.11%	-2,940		Timeline
DORMDORMAN PRODS INC	179,720	$23.3M	1.1%	new		Timeline
MTSIMACOM TECH SOLUTIONS HLDGS I	179,070	$23.3M	1.1%	+25,970		Timeline
GGENPACT LIMITED	523,600	$22.5M	1.06%	+81,200		Timeline
UCTTULTRA CLEAN HLDGS INC	613,300	$22M	1.04%	+173,200		Timeline
ANFABERCROMBIE & FITCH CO	147,300	$22M	1.04%	+18,800		Timeline
NVMINOVA LTD	111,000	$21.9M	1.03%	+48,600		Timeline
RMBSRAMBUS INC DEL	409,400	$21.6M	1.02%	new		Timeline
ITRIITRON INC	199,110	$21.6M	1.02%	+12,200		Timeline
LRNSTRIDE INC	207,300	$21.5M	1.02%	+92,500		Timeline
ONTOONTO INNOVATION INC	129,235	$21.5M	1.02%	0		Timeline
FSSFEDERAL SIGNAL CORP	229,830	$21.2M	1%	+40,100		Timeline
LIVNLIVANOVA PLC	440,535	$20.4M	0.96%	+155,850		Timeline
HIMSHIMS & HERS HEALTH INC	843,600	$20.4M	0.96%	-100,000		Timeline
MMSIMERIT MED SYS INC	208,760	$20.2M	0.95%	+6,620		Timeline
WFRDWEATHERFORD INTL PLC	275,888	$19.8M	0.93%	-60,826		Timeline
ACAARCOSA INC	203,000	$19.6M	0.93%	new		Timeline
PRMBPRIMO BRANDS CORPORATION	632,400	$19.5M	0.92%	+193,600		Timeline
BRBRBELLRING BRANDS INC	253,100	$19.1M	0.9%	+47,100		Timeline
PRIMPRIMORIS SVCS CORP	242,900	$18.6M	0.87%	+33,000		Timeline
AAOIAPPLIED OPTOELECTRONICS INC	495,815	$18.3M	0.86%	-370,100		Timeline
CARGCARGURUS INC	500,000	$18.3M	0.86%	new		Timeline
TNDMTANDEM DIABETES CARE INC	506,600	$18.2M	0.86%	+58,550		Timeline
CCSCENTURY COMMUNITIES INC	248,000	$18.2M	0.86%	+55,300		Timeline
BOXBOX INC	558,500	$17.6M	0.83%	+36,500		Timeline
HAEHAEMONETICS CORP MASS	224,920	$17.6M	0.83%	+47,125		Timeline
ELFE L F BEAUTY INC	137,700	$17.3M	0.81%	+99,300		Timeline
ACIWACI WORLDWIDE INC	333,012	$17.3M	0.81%	+127,300		Timeline
AIZASSURANT INC	81,000	$17.3M	0.81%	+12,600		Timeline
GAPGAP INC	726,500	$17.2M	0.81%	new		Timeline
OSISOSI SYSTEMS INC	100,400	$16.8M	0.79%	+31,200		Timeline
DECKDECKERS OUTDOOR CORP	82,340	$16.7M	0.79%	+30,500		Timeline
AMSCAMERICAN SUPERCONDUCTOR CORP	664,400	$16.4M	0.77%	0		Timeline
YOUCLEAR SECURE INC	609,400	$16.2M	0.77%	+30,000		Timeline
CAMTCAMTEK LTD	199,980	$16.2M	0.76%	+21,800		Timeline
AVAVAEROVIRONMENT INC	102,720	$15.8M	0.75%	+9,980		Timeline
CLBTCELLEBRITE DI LTD	692,910	$15.3M	0.72%	+8,100		Timeline
FORMFORMFACTOR INC	337,480	$14.8M	0.7%	+6,700		Timeline
IMAXIMAX CORP	579,600	$14.8M	0.7%	+132,600		Timeline
OMCLOMNICELL COM	333,200	$14.8M	0.7%	new		Timeline
DOCNDIGITALOCEAN HLDGS INC	425,700	$14.5M	0.68%	+3,500		Timeline
BFAMBRIGHT HORIZONS FAM SOL IN D	129,904	$14.4M	0.68%	+36,600		Timeline
OLEDUNIVERSAL DISPLAY CORP	97,993	$14.3M	0.68%	-179		Timeline
CRSCARPENTER TECHNOLOGY CORP	83,441	$14.2M	0.67%	+6,201		Timeline
DLBDOLBY LABORATORIES INC	181,000	$14.1M	0.67%	new		Timeline
MR COOPER GROUP INCMR COOPER GROUP INC	147,100	$14.1M	0.67%	+2,500
FNFABRINET	63,800	$14M	0.66%	+6,600		Timeline
FRPTFRESHPET INC	94,300	$14M	0.66%	new		Timeline
CBTCABOT CORP	152,800	$14M	0.66%	0		Timeline
BLBDBLUE BIRD CORP	358,900	$13.9M	0.65%	+59,800		Timeline
SFMSPROUTS FMRS MKT INC	108,500	$13.8M	0.65%	0		Timeline
RSIRUSH STREET INTERACTIVE INC	991,900	$13.6M	0.64%	+20,000		Timeline
PEGAPEGASYSTEMS INC	145,500	$13.6M	0.64%	new		Timeline
FRSHFRESHWORKS INC	826,600	$13.4M	0.63%	new		Timeline
AMBAAMBARELLA INC	182,800	$13.3M	0.63%	+20,800		Timeline
NEONEOGENOMICS INC	768,700	$12.7M	0.6%	+50,000		Timeline
SRADSPORTRADAR GROUP AG	728,900	$12.6M	0.6%	new		Timeline
STRASTRATEGIC ED INC	134,500	$12.6M	0.59%	+31,500		Timeline
WEAVWEAVE COMMUNICATIONS INC	770,150	$12.3M	0.58%	+160,750		Timeline
QTWOQ2 HLDGS INC	116,500	$11.7M	0.55%	+16,910		Timeline
TILEINTERFACE INC	480,100	$11.7M	0.55%	+70,200		Timeline
LOPEGRAND CANYON ED INC	71,200	$11.7M	0.55%	+2,800		Timeline
BROSDUTCH BROS INC	219,000	$11.5M	0.54%	0		Timeline
GDYNGRID DYNAMICS HLDGS INC	503,000	$11.2M	0.53%	+99,100		Timeline
SPXCSPX TECHNOLOGIES INC	75,400	$11M	0.52%	+13,600		Timeline
ICHRICHOR HOLDINGS	337,800	$10.9M	0.51%	new		Timeline
CBSHCOMMERCE BANCSHARES INC	167,790	$10.5M	0.49%	+49,490		Timeline
OSPNONESPAN INC	545,450	$10.1M	0.48%	+174,750		Timeline
DUOLDUOLINGO INC	31,000	$10.1M	0.47%	0		Timeline
CPRXCATALYST PHARMACEUTICALS INC	467,100	$9.75M	0.46%	+8,700		Timeline
UAAUNDER ARMOUR INC	1,153,200	$9.55M	0.45%	new		Timeline
WGSGENEDX HOLDINGS CORP	123,500	$9.49M	0.45%	+1,500		Timeline
LMBLIMBACH HLDGS INC	110,800	$9.48M	0.45%	0		Timeline
LMATLEMAITRE VASCULAR INC	102,305	$9.43M	0.44%	+1,601		Timeline
OSWONESPAWORLD HOLDINGS LIMITED	465,400	$9.26M	0.44%	+42,600		Timeline
CDNACAREDX INC	423,471	$9.07M	0.43%	+128,971		Timeline
ABCBAMERIS BANCORP	144,100	$9.02M	0.43%	+16,200		Timeline
AORTARTIVION INC	312,900	$8.95M	0.42%	+30,500		Timeline
FIVEFIVE BELOW INC	85,000	$8.92M	0.42%	new		Timeline
PLAYA HOTELS & RESORTS NVPLAYA HOTELS & RESORTS NV	705,100	$8.92M	0.42%	-67,400
HQYHEALTHEQUITY INC	91,500	$8.78M	0.41%	+7,100		Timeline
PAYOPAYONEER GLOBAL INC	858,691	$8.62M	0.41%	0		Timeline
SPSCSPS COMM INC	46,600	$8.57M	0.4%	+11,900		Timeline
COCOVITA COCO CO INC	231,500	$8.54M	0.4%	+65,800		Timeline
SIMOSILICON MOTION TECHNOLOGY CO	157,900	$8.53M	0.4%	-119,400		Timeline
WAYWAYSTAR HLDG CORP	231,300	$8.49M	0.4%	new		Timeline
EXLSEXLSERVICE HLDGS INC	190,800	$8.47M	0.4%	+9,800		Timeline
EZPWEZCORP INC	685,500	$8.38M	0.39%	0		Timeline
MTDRMATADOR RES CO	144,800	$8.15M	0.38%	+7,900		Timeline
ICFIICF INTL INC	67,671	$8.07M	0.38%	-47,329		Timeline
OSCROSCAR HEALTH INC	593,850	$7.98M	0.38%	+17,000		Timeline
WINGWINGSTOP INC	28,000	$7.96M	0.38%	+3,600		Timeline
MHOM/I HOMES INC	58,200	$7.74M	0.36%	+13,900		Timeline
BOOTBOOT BARN HLDGS INC	50,800	$7.71M	0.36%	-18,600		Timeline
ADUSADDUS HOMECARE CORP	59,900	$7.51M	0.35%	+11,400		Timeline
DESPEGAR COM CORPDESPEGAR COM CORP	389,300	$7.49M	0.35%	+113,700
EOLSEVOLUS INC	677,600	$7.48M	0.35%	+162,700		Timeline
KRYSKRYSTAL BIOTECH INC	46,800	$7.33M	0.35%	0		Timeline
ACMRACM RESH INC	485,200	$7.33M	0.35%	+68,700		Timeline
FCFSFIRSTCASH HOLDINGS INC	70,100	$7.26M	0.34%	-27,800		Timeline
MGYMAGNOLIA OIL & GAS CORP	306,300	$7.16M	0.34%	+42,800		Timeline
AMPHAMPHASTAR PHARMACEUTICALS IN	184,595	$6.85M	0.32%	+23,440		Timeline
QLYSQUALYS INC	47,800	$6.7M	0.32%	new		Timeline
SKWDSKYWARD SPECIALTY INS GROUP	131,600	$6.65M	0.31%	+5,000		Timeline
AOSLALPHA & OMEGA SEMICONDUCTOR	177,700	$6.58M	0.31%	-27,000		Timeline
BLUEPRINT MEDICINES CORPBLUEPRINT MEDICINES CORP	75,000	$6.54M	0.31%	new
VRNSVARONIS SYS INC	145,800	$6.48M	0.31%	+6,000		Timeline
FBKFB FINL CORP	123,500	$6.36M	0.3%	+4,800		Timeline
BVSBIOVENTUS INC	601,714	$6.32M	0.3%	+90,800		Timeline
AGXARGAN INC	45,900	$6.29M	0.3%	+1,500		Timeline
MBUUMALIBU BOATS INC	166,900	$6.27M	0.3%	new		Timeline
MNKDMANNKIND CORP	968,400	$6.23M	0.29%	+169,600		Timeline
RDWRRADWARE LTD	274,700	$6.19M	0.29%	+10,000		Timeline
MDPEDIATRIX MEDICAL GROUP INC	466,600	$6.12M	0.29%	new		Timeline
DCODUCOMMUN INC DEL	95,700	$6.09M	0.29%	new		Timeline
PRGPROG HOLDINGS INC	143,600	$6.07M	0.29%	+16,800		Timeline
KEXKIRBY CORP	56,950	$6.03M	0.28%	+3,700		Timeline
FRMEFIRST MERCHANTS CORP	145,600	$5.81M	0.27%	+18,400		Timeline
NICNICOLET BANKSHARES INC	55,200	$5.79M	0.27%	+8,800		Timeline
HWKNHAWKINS INC	45,700	$5.61M	0.26%	+1,700		Timeline
VSECVSE CORP	58,600	$5.57M	0.26%	+13,400		Timeline
VERINT SYS INCVERINT SYS INC	201,700	$5.54M	0.26%	+51,700
VECOVEECO INSTRS INC DEL	205,800	$5.52M	0.26%	-120,800		Timeline
ARIS WATER SOLUTIONS INCARIS WATER SOLUTIONS INC	227,635	$5.45M	0.26%	+2,435
Vital Energy IncVital Energy Inc	168,700	$5.22M	0.25%	+54,800
CLWCLEARWATER PAPER CORP	175,200	$5.22M	0.25%	0		Timeline
QNSTQUINSTREET INC	225,000	$5.19M	0.24%	new		Timeline
HURNHURON CONSULTING GROUP INC	40,500	$5.03M	0.24%	0		Timeline
AXGNAXOGEN INC	300,500	$4.95M	0.23%	+72,500		Timeline
EIGEMPLOYERS HLDGS INC	96,100	$4.92M	0.23%	+3,600		Timeline
AVPTAVEPOINT INC	296,300	$4.89M	0.23%	0		Timeline
KNSAKINIKSA PHARMACEUTICALS INTL	237,200	$4.69M	0.22%	+36,200		Timeline
HOSHORNBECK OFFSHORE SERVICES I	501,700	$4.68M	0.22%	+94,200		Timeline
ATRCATRICURE INC	151,500	$4.63M	0.22%	new		Timeline
STRLSTERLING INFRASTRUCTURE INC	27,300	$4.6M	0.22%	0		Timeline
REVGREV GROUP INC	139,600	$4.45M	0.21%	+7,800		Timeline
PLABPHOTRONICS INC	186,000	$4.38M	0.21%	0		Timeline
SRCE1ST SOURCE CORP	73,500	$4.29M	0.2%	+1,700		Timeline
NGVCNATURAL GROCERS BY VITAMIN	107,100	$4.25M	0.2%	+2,100		Timeline
PDSPRECISION DRILLING CORP	68,400	$4.18M	0.2%	+8,700		Timeline
BLNDBLEND LABS INC	964,700	$4.06M	0.19%	new		Timeline
RESRPC INC	629,155	$3.74M	0.18%	+20,571		Timeline
POWLPOWELL INDS INC	16,800	$3.72M	0.18%	0		Timeline
THRMGENTHERM INC	92,100	$3.68M	0.17%	0		Timeline
ANIPANI PHARMACEUTICALS INC	65,600	$3.63M	0.17%	+22,100		Timeline
AIOTPOWERFLEET INC	542,100	$3.61M	0.17%	new		Timeline
UNIVERSAL STAINLESS & ALLOYUNIVERSAL STAINLESS & ALLOY	80,900	$3.56M	0.17%	0
MGNIMAGNITE INC	205,700	$3.27M	0.15%	+5,700		Timeline
BLZEBACKBLAZE INC	538,700	$3.24M	0.15%	0		Timeline
ULHUNIVERSAL LOGISTICS HLDGS IN	70,500	$3.24M	0.15%	+1,500		Timeline
GRCGORMAN RUPP CO	83,400	$3.16M	0.15%	+14,500		Timeline
LINDLINDBLAD EXPEDITIONS HLDGS I	266,000	$3.15M	0.15%	new		Timeline
SGSWEETGREEN INC	96,201	$3.08M	0.15%	+610		Timeline
WLDNWILLDAN GROUP INC	80,100	$3.05M	0.14%	+1,000		Timeline
LQDALIQUIDIA CORPORATION	250,900	$2.95M	0.14%	0		Timeline
ARDXARDELYX INC	579,300	$2.94M	0.14%	0		Timeline
SEMRSEMRUSH HLDGS INC	233,700	$2.78M	0.13%	+39,700		Timeline
MTRXMATRIX SVC CO	221,075	$2.65M	0.12%	+10,000		Timeline
CDNSCADENCE DESIGN SYSTEM INC	8,200	$2.46M	0.12%	-1,000		Timeline
TSMTAIWAN SEMICONDUCTOR MANUFAC	10,500	$2.07M	0.1%	-2,000		Timeline
SPYSTATE STR SPDR S&P 500 ETF T	3,488	$2.04M	0.1%	-91		Timeline
SHOPSHOPIFY INC	11,500	$1.22M	0.06%	new		Timeline
PDDPDD HOLDINGS INC	12,000	$1.16M	0.05%	-5,000		Timeline
MSFTMICROSOFT CORP	2,685	$1.13M	0.05%	0		Timeline
SPOTSPOTIFY TECHNOLOGY S A	2,300	$1.03M	0.05%	new		Timeline
JPMJPMORGAN CHASE & CO	3,516	$843K	0.04%	-193		Timeline
AAPLAPPLE INC	3,243	$812K	0.04%	-49		Timeline
MMYTMAKEMYTRIP LIMITED MAURITIUS	6,350	$713K	0.03%	-7,650		Timeline
RXSTRXSIGHT INC	19,040	$655K	0.03%	-107,600		Timeline
TALTAL ED GROUP	60,000	$601K	0.03%	+20,000		Timeline
FUTUFUTU HLDGS LTD	6,500	$520K	0.02%	-5,500		Timeline
TRVTRAVELERS COMPANIES INC	1,933	$466K	0.02%	-49		Timeline
IWOISHARES TR	1,600	$461K	0.02%	new		Timeline
HSAIHESAI GROUP	28,000	$387K	0.02%	new		Timeline
MAMASTERCARD INCORPORATED	716	$377K	0.02%	-60		Timeline
RMDRESMED INC	1,450	$332K	0.02%	0		Timeline
JNJJOHNSON & JOHNSON	2,117	$306K	0.01%	+4		Timeline
AMGNAMGEN INC	1,032	$269K	0.01%	+1		Timeline
MCDMCDONALDS CORP	848	$246K	0.01%	+1		Timeline
YMMFULL TRUCK ALLIANCE CO LTD	22,000	$238K	0.01%	new		Timeline
WMTWALMART INC	2,604	$235K	0.01%	-390		Timeline
BNYBANK OF NY MELLON CORP	2,945	$226K	0.01%	-58		Timeline
AFLAFLAC INC	2,000	$207K	0.01%	0		Timeline
Xenacare Hldgs, Inc.Xenacare Hldgs, Inc.	140,000	$0	0%	0	Value filed as zero, left out of ratios.

Sold out in Q4 2024

Positions in the previous quarter's report that this quarter's report no longer lists.

Security	Shares before	Value before	Type
TMDXTRANSMEDICS GROUP INC	168,690	$26.5M	shares
CROXCROCS INC	152,900	$22.1M	shares
LNTHLANTHEUS HLDGS INC	191,400	$21M	shares
TDWTIDEWATER INC NEW	211,505	$15.2M	shares
IBPINSTALLED BLDG PRODS INC	55,700	$13.7M	shares
BMIBADGER METER INC	60,300	$13.2M	shares
VRTVERTIV HOLDINGS CO	125,961	$12.5M	shares
ACLSAXCELIS TECHNOLOGIES INC	118,779	$12.5M	shares
NXTNEXTPOWER INC	330,300	$12.4M	shares
ITGRINTEGER HLDGS CORP	88,100	$11.5M	shares
PETIQ INCPETIQ INC	340,700	$10.5M	shares
OSKOSHKOSH CORP	104,249	$10.4M	shares
MMSMAXIMUS INC	106,800	$9.95M	shares
MYGNMYRIAD GENETICS INC	360,700	$9.88M	shares
FIXCOMFORT SYS USA INC	25,200	$9.84M	shares
INSWINTERNATIONAL SEAWAYS INC	186,700	$9.63M	shares
ESABESAB CORPORATION	89,800	$9.55M	shares
AEHRAEHR TEST SYS	534,400	$6.87M	shares
ATIATI INC	99,100	$6.63M	shares
BLKBBLACKBAUD INC	76,300	$6.46M	shares
KWRQUAKER HOUGHTON	37,700	$6.35M	shares
ERIIENERGY RECOVERY INC	363,700	$6.32M	shares
LBRTLIBERTY ENERGY INC	326,500	$6.23M	shares
MSAMSA SAFETY INC	34,900	$6.19M	shares
CECOCECO ENVIRONMENTAL CORP	201,400	$5.68M	shares
LNWOLIGHT & WONDER INC	55,300	$5.02M	shares
HLITHARMONIC INC	303,000	$4.41M	shares
AVNWAVIAT NETWORKS INC	199,307	$4.31M	shares
DVAXDYNAVAX TECHNOLOGIES CORP	366,200	$4.08M	shares
SIBNSI BONE INC	275,900	$3.86M	shares
ARLOARLO TECHNOLOGIES INC	273,400	$3.31M	shares
EPACENERPAC TOOL GROUP CORP	77,300	$3.24M	shares
LPGDORIAN LPG LTD	84,800	$2.92M	shares
AXTIAXT INC	865,721	$2.1M	shares
MPWRMONOLITHIC PWR SYS INC	750	$693K	shares
EMBJEMBRAER S.A.	10,300	$364K	shares
TBBBBBB FOODS INC	11,000	$330K	shares
VTEXVTEX	42,200	$314K	shares
ARCOARCOS DORADOS HLDGS INC	30,000	$262K	shares
FCXFREEPORT MCMORAN INC	4,027	$201K	shares

How Q4 2024 was built

Available 13F filings of this filer for the quarter and their roles: the base report is the latest original or restatement, NEW HOLDINGS amendments filed after it are added (method).

Filing	Role	Amendment	Filed	Accepted	Ingested
13F-HR 0001213900-25-013939	base		2025-02-14	acceptance time not in the bulk data set	2026-10-07 18:25:55 UTC