OBERWEIS ASSET MANAGEMENT INC/

13F filer, CIK 937886, LISLE, IL

OBERWEIS ASSET MANAGEMENT INC/ reported $1,951,706,141 across 206 holdings for the quarter ended 2024-09-30, in a 13F-HR filed 2024-11-14. Its ten largest share positions make up 17.75% of the portfolio.

Filed 2024-11-14 (acceptance time not in the bulk data set), ingested 2026-10-07 18:26:56 UTC13F-HR 0001213900-24-098012

Period: 2024-09-30
Reported value: $1.95B
Holdings: 206
Top 10 weight: 17.75%
New: 35
Sold out: 26

Largest buys vs the previous quarter

Security	Shares change	Approx. value
ICUInew	+130,500	$23.8M
LNTHnew	+191,400	$21M
DOCSnew	+463,100	$20.2M
Gnew	+442,400	$17.3M
ADMAadded	+866,380	$17.3M

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
CSTMexited	-1,838,871	-$34.7M
RAMPexited	-512,630	-$15.9M
WWDexited	-81,600	-$14.2M
ATECexited	-1,327,360	-$13.9M
AZEK CO INCexited	-304,800	-$12.8M

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, Q3 2024

Share positions as resolved from 13F-HR 0001213900-24-098012, largest first. % of portfolio is the value over $1,951,706,141, the sum of the share positions whose value is usable for ratios (method).

Security	Shares	Value	% of portfolio	Change	Latest event	Timeline
ADMAADMA BIOLOGICS INC	2,907,080	$58.1M	2.98%	+866,380		Timeline
SNSHARKNINJA INC	462,190	$50.2M	2.57%	+67,530		Timeline
ZETAZETA GLOBAL HOLDINGS CORP	1,604,130	$47.9M	2.45%	+15,750		Timeline
EHCENCOMPASS HEALTH CORP	306,608	$29.6M	1.52%	+14,421		Timeline
WFRDWEATHERFORD INTL PLC	336,714	$28.6M	1.47%	+43,944		Timeline
PSNPARSONS CORP DEL	267,720	$27.8M	1.42%	+118,600		Timeline
ONTOONTO INNOVATION INC	129,235	$26.8M	1.37%	-310		Timeline
TMDXTRANSMEDICS GROUP INC	168,690	$26.5M	1.36%	-18,400		Timeline
CRDOCREDO TECHNOLOGY GROUP HOLDI	828,314	$25.5M	1.31%	+47,984		Timeline
CLHCLEAN HARBORS INC	105,370	$25.5M	1.3%	+2,125		Timeline
VCYTVERACYTE INC	715,920	$24.4M	1.25%	+61,820		Timeline
ICUIICU MED INC	130,500	$23.8M	1.22%	new		Timeline
SKYWSKYWEST INC	277,650	$23.6M	1.21%	-13,400		Timeline
CROXCROCS INC	152,900	$22.1M	1.13%	+25,800		Timeline
FLSFLOWSERVE CORP	409,962	$21.2M	1.09%	+39,828		Timeline
LNTHLANTHEUS HLDGS INC	191,400	$21M	1.08%	new		Timeline
OLEDUNIVERSAL DISPLAY CORP	98,172	$20.6M	1.06%	-1,876		Timeline
DOCSDOXIMITY INC	463,100	$20.2M	1.03%	new		Timeline
MMSIMERIT MED SYS INC	202,140	$20M	1.02%	+8,300		Timeline
ITRIITRON INC	186,910	$20M	1.02%	+34,510		Timeline
CCSCENTURY COMMUNITIES INC	192,700	$19.8M	1.02%	+2,600		Timeline
FTDRFRONTDOOR INC	411,400	$19.7M	1.01%	+115,900		Timeline
YOUCLEAR SECURE INC	579,400	$19.2M	0.98%	+56,200		Timeline
ICFIICF INTL INC	115,000	$19.2M	0.98%	+3,100		Timeline
TNDMTANDEM DIABETES CARE INC	448,050	$19M	0.97%	+166,050		Timeline
AVAVAEROVIRONMENT INC	92,740	$18.6M	0.95%	+16,700		Timeline
ANFABERCROMBIE & FITCH CO	128,500	$18M	0.92%	+37,800		Timeline
FSSFEDERAL SIGNAL CORP	189,730	$17.7M	0.91%	+34,400		Timeline
UCTTULTRA CLEAN HLDGS INC	440,100	$17.6M	0.9%	+120,500		Timeline
HIMSHIMS & HERS HEALTH INC	943,600	$17.4M	0.89%	+158,600		Timeline
GGENPACT LIMITED	442,400	$17.3M	0.89%	new		Timeline
BOXBOX INC	522,000	$17.1M	0.88%	new		Timeline
CBTCABOT CORP	152,800	$17.1M	0.88%	+18,300		Timeline
DOCNDIGITALOCEAN HLDGS INC	422,200	$17.1M	0.87%	new		Timeline
MTSIMACOM TECH SOLUTIONS HLDGS I	153,100	$17M	0.87%	new		Timeline
SIMOSILICON MOTION TECHNOLOGY CO	277,300	$16.8M	0.86%	0		Timeline
AMSCAMERICAN SUPERCONDUCTOR CORP	664,400	$15.7M	0.8%	0		Timeline
FORMFORMFACTOR INC	330,780	$15.2M	0.78%	+25,000		Timeline
TDWTIDEWATER INC NEW	211,505	$15.2M	0.78%	+63,410		Timeline
LIVNLIVANOVA PLC	284,685	$15M	0.77%	-38,000		Timeline
BLBDBLUE BIRD CORP	299,100	$14.3M	0.73%	0		Timeline
HAEHAEMONETICS CORP MASS	177,795	$14.3M	0.73%	+12,500		Timeline
CAMTCAMTEK LTD	178,180	$14.2M	0.73%	0		Timeline
IBPINSTALLED BLDG PRODS INC	55,700	$13.7M	0.7%	0		Timeline
AIZASSURANT INC	68,400	$13.6M	0.7%	+6,500		Timeline
FNFABRINET	57,200	$13.5M	0.69%	+29,300		Timeline
MR COOPER GROUP INCMR COOPER GROUP INC	144,600	$13.3M	0.68%	new
BMIBADGER METER INC	60,300	$13.2M	0.67%	+9,100		Timeline
BFAMBRIGHT HORIZONS FAM SOL IN D	93,304	$13.1M	0.67%	new		Timeline
NVMINOVA LTD	62,400	$13M	0.67%	new		Timeline
VRTVERTIV HOLDINGS CO	125,961	$12.5M	0.64%	-2,849		Timeline
BRBRBELLRING BRANDS INC	206,000	$12.5M	0.64%	new		Timeline
ACLSAXCELIS TECHNOLOGIES INC	118,779	$12.5M	0.64%	+26,980		Timeline
AAOIAPPLIED OPTOELECTRONICS INC	865,915	$12.4M	0.63%	0		Timeline
NXTNEXTPOWER INC	330,300	$12.4M	0.63%	+51,400		Timeline
CRSCARPENTER TECHNOLOGY CORP	77,240	$12.3M	0.63%	+2,540		Timeline
OSCROSCAR HEALTH INC	576,850	$12.2M	0.63%	+169,350		Timeline
PRIMPRIMORIS SVCS CORP	209,900	$12.2M	0.62%	0		Timeline
SFMSPROUTS FMRS MKT INC	108,500	$12M	0.61%	0		Timeline
BOOTBOOT BARN HLDGS INC	69,400	$11.6M	0.59%	0		Timeline
CLBTCELLEBRITE DI LTD	684,810	$11.5M	0.59%	+81,210		Timeline
ITGRINTEGER HLDGS CORP	88,100	$11.5M	0.59%	-31,100		Timeline
FCFSFIRSTCASH HOLDINGS INC	97,900	$11.2M	0.58%	+15,700		Timeline
PRMBPRIMO BRANDS CORPORATION	438,800	$11.1M	0.57%	new		Timeline
VECOVEECO INSTRS INC DEL	326,600	$10.8M	0.55%	+34,700		Timeline
NEONEOGENOMICS INC	718,700	$10.6M	0.54%	+50,000		Timeline
RSIRUSH STREET INTERACTIVE INC	971,900	$10.5M	0.54%	0		Timeline
OSISOSI SYSTEMS INC	69,200	$10.5M	0.54%	0		Timeline
PETIQ INCPETIQ INC	340,700	$10.5M	0.54%	0
ACIWACI WORLDWIDE INC	205,712	$10.5M	0.54%	-206,950		Timeline
OSKOSHKOSH CORP	104,249	$10.4M	0.54%	-78,537		Timeline
WINGWINGSTOP INC	24,400	$10.2M	0.52%	0		Timeline
MMSMAXIMUS INC	106,800	$9.95M	0.51%	-3,800		Timeline
MYGNMYRIAD GENETICS INC	360,700	$9.88M	0.51%	0		Timeline
SPXCSPX TECHNOLOGIES INC	61,800	$9.85M	0.5%	-12,700		Timeline
FIXCOMFORT SYS USA INC	25,200	$9.84M	0.5%	+1,100		Timeline
LRNSTRIDE INC	114,800	$9.79M	0.5%	-8,500		Timeline
LOPEGRAND CANYON ED INC	68,400	$9.7M	0.5%	+16,800		Timeline
INSWINTERNATIONAL SEAWAYS INC	186,700	$9.63M	0.49%	+35,100		Timeline
ESABESAB CORPORATION	89,800	$9.55M	0.49%	-60,900		Timeline
STRASTRATEGIC ED INC	103,000	$9.53M	0.49%	+19,200		Timeline
LMATLEMAITRE VASCULAR INC	100,704	$9.35M	0.48%	+1		Timeline
CDNACAREDX INC	294,500	$9.2M	0.47%	+44,100		Timeline
IMAXIMAX CORP	447,000	$9.17M	0.47%	+71,000		Timeline
AMBAAMBARELLA INC	162,000	$9.14M	0.47%	new		Timeline
CPRXCATALYST PHARMACEUTICALS INC	458,400	$9.11M	0.47%	0		Timeline
DUOLDUOLINGO INC	31,000	$8.74M	0.45%	+3,500		Timeline
KRYSKRYSTAL BIOTECH INC	46,800	$8.52M	0.44%	+4,200		Timeline
ACMRACM RESH INC	416,500	$8.45M	0.43%	-24,630		Timeline
LMBLIMBACH HLDGS INC	110,800	$8.39M	0.43%	-54,000		Timeline
EOLSEVOLUS INC	514,900	$8.34M	0.43%	0		Timeline
DECKDECKERS OUTDOOR CORP	51,840	$8.27M	0.42%	+42,390		Timeline
ABCBAMERIS BANCORP	127,900	$7.98M	0.41%	new		Timeline
QTWOQ2 HLDGS INC	99,590	$7.94M	0.41%	+15,480		Timeline
VRNSVARONIS SYS INC	139,800	$7.9M	0.4%	new		Timeline
AMPHAMPHASTAR PHARMACEUTICALS IN	161,155	$7.82M	0.4%	+26,100		Timeline
WEAVWEAVE COMMUNICATIONS INC	609,400	$7.8M	0.4%	0		Timeline
TILEINTERFACE INC	409,900	$7.78M	0.4%	new		Timeline
EZPWEZCORP INC	685,500	$7.68M	0.39%	0		Timeline
AOSLALPHA & OMEGA SEMICONDUCTOR	204,700	$7.6M	0.39%	+24,700		Timeline
MHOM/I HOMES INC	44,300	$7.59M	0.39%	+4,000		Timeline
AORTARTIVION INC	282,400	$7.52M	0.39%	0		Timeline
CBSHCOMMERCE BANCSHARES INC	118,300	$7.03M	0.36%	new		Timeline
BROSDUTCH BROS INC	219,000	$7.01M	0.36%	+66,300		Timeline
OSWONESPAWORLD HOLDINGS LIMITED	422,800	$6.98M	0.36%	+2,400		Timeline
HQYHEALTHEQUITY INC	84,400	$6.91M	0.35%	+19,800		Timeline
EXLSEXLSERVICE HLDGS INC	181,000	$6.91M	0.35%	0		Timeline
AEHRAEHR TEST SYS	534,400	$6.87M	0.35%	0		Timeline
MTDRMATADOR RES CO	136,900	$6.77M	0.35%	+25,800		Timeline
SPSCSPS COMM INC	34,700	$6.74M	0.35%	+2,900		Timeline
ATIATI INC	99,100	$6.63M	0.34%	+10,400		Timeline
KEXKIRBY CORP	53,250	$6.52M	0.33%	+8,900		Timeline
PAYOPAYONEER GLOBAL INC	858,691	$6.47M	0.33%	new		Timeline
BLKBBLACKBAUD INC	76,300	$6.46M	0.33%	+8,500		Timeline
ADUSADDUS HOMECARE CORP	48,500	$6.45M	0.33%	+1,000		Timeline
MGYMAGNOLIA OIL & GAS CORP	263,500	$6.43M	0.33%	0		Timeline
KWRQUAKER HOUGHTON	37,700	$6.35M	0.33%	-16,700		Timeline
ERIIENERGY RECOVERY INC	363,700	$6.32M	0.32%	new		Timeline
RXSTRXSIGHT INC	126,640	$6.26M	0.32%	0		Timeline
LBRTLIBERTY ENERGY INC	326,500	$6.23M	0.32%	+45,400		Timeline
MSAMSA SAFETY INC	34,900	$6.19M	0.32%	-16,100		Timeline
OSPNONESPAN INC	370,700	$6.18M	0.32%	0		Timeline
PRGPROG HOLDINGS INC	126,800	$6.15M	0.32%	new		Timeline
BVSBIOVENTUS INC	510,914	$6.11M	0.31%	+130,000		Timeline
PLAYA HOTELS & RESORTS NVPLAYA HOTELS & RESORTS NV	772,500	$5.99M	0.31%	0
RDWRRADWARE LTD	264,700	$5.9M	0.3%	new		Timeline
CECOCECO ENVIRONMENTAL CORP	201,400	$5.68M	0.29%	-193,300		Timeline
GDYNGRID DYNAMICS HLDGS INC	403,900	$5.65M	0.29%	new		Timeline
HWKNHAWKINS INC	44,000	$5.61M	0.29%	0		Timeline
FBKFB FINL CORP	118,700	$5.57M	0.29%	new		Timeline
WGSGENEDX HOLDINGS CORP	122,000	$5.18M	0.27%	0		Timeline
SKWDSKYWARD SPECIALTY INS GROUP	126,600	$5.16M	0.26%	0		Timeline
MNKDMANNKIND CORP	798,800	$5.02M	0.26%	0		Timeline
KNSAKINIKSA PHARMACEUTICALS INTL	201,000	$5.02M	0.26%	new		Timeline
LNWOLIGHT & WONDER INC	55,300	$5.02M	0.26%	0		Timeline
CLWCLEARWATER PAPER CORP	175,200	$5M	0.26%	+63,000		Timeline
FRMEFIRST MERCHANTS CORP	127,200	$4.73M	0.24%	+3,800		Timeline
COCOVITA COCO CO INC	165,700	$4.69M	0.24%	+300		Timeline
PLABPHOTRONICS INC	186,000	$4.61M	0.24%	-80,000		Timeline
HOSHORNBECK OFFSHORE SERVICES I	407,500	$4.52M	0.23%	0		Timeline
AGXARGAN INC	44,400	$4.5M	0.23%	new		Timeline
NICNICOLET BANKSHARES INC	46,400	$4.44M	0.23%	new		Timeline
EIGEMPLOYERS HLDGS INC	92,500	$4.44M	0.23%	0		Timeline
HLITHARMONIC INC	303,000	$4.41M	0.23%	new		Timeline
HURNHURON CONSULTING GROUP INC	40,500	$4.4M	0.23%	0		Timeline
AVNWAVIAT NETWORKS INC	199,307	$4.31M	0.22%	0		Timeline
SRCE1ST SOURCE CORP	71,800	$4.3M	0.22%	+7,900		Timeline
THRMGENTHERM INC	92,100	$4.29M	0.22%	0		Timeline
ELFE L F BEAUTY INC	38,400	$4.19M	0.21%	-31,520		Timeline
DVAXDYNAVAX TECHNOLOGIES CORP	366,200	$4.08M	0.21%	+34,900		Timeline
ARDXARDELYX INC	579,300	$3.99M	0.2%	+207,500		Timeline
STRLSTERLING INFRASTRUCTURE INC	27,300	$3.96M	0.2%	0		Timeline
RESRPC INC	608,584	$3.87M	0.2%	-29,579		Timeline
SIBNSI BONE INC	275,900	$3.86M	0.2%	0		Timeline
VERINT SYS INCVERINT SYS INC	150,000	$3.8M	0.19%	0
ARIS WATER SOLUTIONS INCARIS WATER SOLUTIONS INC	225,200	$3.8M	0.19%	0
VSECVSE CORP	45,200	$3.74M	0.19%	-21,100		Timeline
POWLPOWELL INDS INC	16,800	$3.73M	0.19%	0		Timeline
REVGREV GROUP INC	131,800	$3.7M	0.19%	+21,700		Timeline
PDSPRECISION DRILLING CORP	59,700	$3.68M	0.19%	0		Timeline
AVPTAVEPOINT INC	296,300	$3.49M	0.18%	0		Timeline
BLZEBACKBLAZE INC	538,700	$3.44M	0.18%	0		Timeline
DESPEGAR COM CORPDESPEGAR COM CORP	275,600	$3.42M	0.18%	0
SGSWEETGREEN INC	95,591	$3.39M	0.17%	+3,340		Timeline
ARLOARLO TECHNOLOGIES INC	273,400	$3.31M	0.17%	0		Timeline
WLDNWILLDAN GROUP INC	79,100	$3.24M	0.17%	0		Timeline
EPACENERPAC TOOL GROUP CORP	77,300	$3.24M	0.17%	0		Timeline
AXGNAXOGEN INC	228,000	$3.2M	0.16%	new		Timeline
UNIVERSAL STAINLESS & ALLOYUNIVERSAL STAINLESS & ALLOY	80,900	$3.13M	0.16%	0
NGVCNATURAL GROCERS BY VITAMIN	105,000	$3.12M	0.16%	new		Timeline
Vital Energy IncVital Energy Inc	113,900	$3.06M	0.16%	0
SEMRSEMRUSH HLDGS INC	194,000	$3.05M	0.16%	+34,800		Timeline
ULHUNIVERSAL LOGISTICS HLDGS IN	69,000	$2.97M	0.15%	+6,800		Timeline
LPGDORIAN LPG LTD	84,800	$2.92M	0.15%	0		Timeline
MGNIMAGNITE INC	200,000	$2.77M	0.14%	0		Timeline
GRCGORMAN RUPP CO	68,900	$2.68M	0.14%	0		Timeline
ANIPANI PHARMACEUTICALS INC	43,500	$2.6M	0.13%	0		Timeline
LQDALIQUIDIA CORPORATION	250,900	$2.51M	0.13%	+67,700		Timeline
CDNSCADENCE DESIGN SYSTEM INC	9,200	$2.49M	0.13%	-3,600		Timeline
MTRXMATRIX SVC CO	211,075	$2.43M	0.12%	0		Timeline
PDDPDD HOLDINGS INC	17,000	$2.29M	0.12%	+5,000		Timeline
TSMTAIWAN SEMICONDUCTOR MANUFAC	12,500	$2.17M	0.11%	-6,000		Timeline
AXTIAXT INC	865,721	$2.1M	0.11%	+206,700		Timeline
SPYSTATE STR SPDR S&P 500 ETF T	3,579	$2.05M	0.11%	-6		Timeline
MMYTMAKEMYTRIP LIMITED MAURITIUS	14,000	$1.3M	0.07%	-3,400		Timeline
MSFTMICROSOFT CORP	2,685	$1.16M	0.06%	-40		Timeline
FUTUFUTU HLDGS LTD	12,000	$1.15M	0.06%	new		Timeline
JPMJPMORGAN CHASE & CO	3,709	$782K	0.04%	-98		Timeline
AAPLAPPLE INC	3,292	$767K	0.04%	-90		Timeline
MPWRMONOLITHIC PWR SYS INC	750	$693K	0.04%	new		Timeline
TALTAL ED GROUP	40,000	$474K	0.02%	new		Timeline
TRVTRAVELERS COMPANIES INC	1,982	$464K	0.02%	-58		Timeline
MAMASTERCARD INCORPORATED	776	$383K	0.02%	0		Timeline
EMBJEMBRAER S.A.	10,300	$364K	0.02%	0		Timeline
RMDRESMED INC	1,450	$354K	0.02%	0		Timeline
JNJJOHNSON & JOHNSON	2,113	$342K	0.02%	-58		Timeline
AMGNAMGEN INC	1,031	$332K	0.02%	-40		Timeline
TBBBBBB FOODS INC	11,000	$330K	0.02%	0		Timeline
VTEXVTEX	42,200	$314K	0.02%	0		Timeline
ARCOARCOS DORADOS HLDGS INC	30,000	$262K	0.01%	0		Timeline
MCDMCDONALDS CORP	847	$258K	0.01%	+1		Timeline
WMTWALMART INC	2,994	$242K	0.01%	-239		Timeline
AFLAFLAC INC	2,000	$224K	0.01%	new		Timeline
BNYBANK OF NY MELLON CORP	3,003	$216K	0.01%	new		Timeline
FCXFREEPORT MCMORAN INC	4,027	$201K	0.01%	new		Timeline
Xenacare Hldgs, Inc.Xenacare Hldgs, Inc.	140,000	$0	0%	0	Value filed as zero, left out of ratios.

Sold out in Q3 2024

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

Security	Shares before	Value before	Type
CSTMCONSTELLIUM SE	1,838,871	$34.7M	shares
RAMPLIVERAMP HLDGS INC	512,630	$15.9M	shares
WWDWOODWARD INC	81,600	$14.2M	shares
ATECALPHATEC HLDGS INC	1,327,360	$13.9M	shares
AZEK CO INCAZEK CO INC	304,800	$12.8M	shares
SLABSILICON LABORATORIES INC	109,500	$12.1M	shares
INFORMATICA INCINFORMATICA INC	379,800	$11.7M	shares
PFBCPREFERRED BK LOS ANGELES CA	95,000	$7.17M	shares
JBIJANUS INTERNATIONAL GROUP IN	560,900	$7.08M	shares
PRIMO WATER CORPORATIONPRIMO WATER CORPORATION	323,500	$7.07M	shares
TREXTREX INC	89,500	$6.63M	shares
ALGMALLEGRO MICROSYSTEMS INC	226,100	$6.39M	shares
ROCKGIBRALTAR INDS INC	88,100	$6.04M	shares
UPWKUPWORK INC	469,200	$5.04M	shares
NVTSNAVITAS SEMICONDUCTOR CORP	1,013,200	$3.98M	shares
MBWMMERCANTILE BK CORP	89,891	$3.65M	shares
TRNSTRANSCAT INC	29,100	$3.48M	shares
PRLBPROTO LABS INC	97,500	$3.01M	shares
BJRIBJS RESTAURANTS INC	72,600	$2.52M	shares
OXMOXFORD INDS INC	23,400	$2.34M	shares
TMETENCENT MUSIC ENTMT GROUP	80,000	$1.12M	shares
DIDIYDIDI GLOBAL INC SPONSORED ADS	130,000	$538K	shares
BZKANZHUN LIMITED	24,000	$451K	shares
MUMICRON TECHNOLOGY INC	3,000	$395K	shares
MRKMERCK & CO INC	1,730	$214K	shares
AMR Corp EscrowAMR Corp Escrow	18,000	$0	shares

How Q3 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 0001213900-24-098012	base		2024-11-14	acceptance time not in the bulk data set	2026-10-07 18:26:56 UTC