OBERWEIS ASSET MANAGEMENT INC/

CIK 0000937886 • 6 13F filings • May 15, 2025 – Aug 14, 2026

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Filer information

Filed by: OBERWEIS ASSET MANAGEMENT INC/, Chief Compliance Officer
Address: 3333 WARRENVILLE ROAD, SUITE 500, LISLE, IL, 60532
Phone: 800-323-6166
AUM: $2.73B

AUM over time

$4.84B latest

Sector allocation over time

Past 5 quarters

Q4 2025

Q3 2025

Q2 2026

Q2 2025

Q1 2026

TechnologyHealthcareConsumer DiscretionaryFinancialsIndustrialsEnergyOther

Holdings by filing

Portfolio value: $2.73B178 positionsView on SEC.gov

			% of Portfolio
1st Source Corp.	COM	$5.3M	0.2%Prev: 0.2%	84,700 SH	Increased+2,000 SH
AAR Corp.	COM	$22.6M	0.8%Prev: 0.8%	272,700 SH	Increased+36,200 SH
ACI Worldwide Inc.	COM	$15.8M	0.6%Prev: 0.7%	330,702 SH	Decreased
Adaptive Biotechnologies	COM	$12.1M	0.4%Prev: 0.4%	744,500 SH	Increased+18,000 SH
Addus Homecare Corp.	COM	$8.4M	0.3%Prev: 0.4%	78,200 SH	Decreased
Advanced Energy Industry, Inc.	COM	$8.3M	0.3%Prev: 0.5%	39,700 SH	Decreased-30,000 SH
Aflac Inc.	COM	$221K	0.0%Prev: 0.0%	2,000 SH	Decreased
Alighnment Healthcare, Inc.	COM	$14.8M	0.5%	747,500 SH	New
Alphabet, Inc. Cl A	COM	$595K	0.0%Prev: 0.0%	1,900 SH	Increased
Alphabet, Inc. Cl C	COM	$508K	0.0%Prev: 0.0%	1,620 SH	Increased
Alphatec Hldgs Inc.	COM	$21.0M	0.8%Prev: 0.3%	1,000,400 SH	Increased+539,278 SH
Ambarella, Inc.	COM	$43.8M	1.6%Prev: 1.9%	617,860 SH	Decreased+6,500 SH
American Eagle Outfitters	COM	$21.5M	0.8%Prev: 0.3%	814,500 SH	Increased+330,500 SH
American Superconductor	COM	$24.1M	0.9%Prev: 1.5%	835,900 SH	Decreased+170,200 SH
Ameris Bancorp	COM	$11.6M	0.4%Prev: 0.4%	156,400 SH	Increased
Amgen, Inc.	COM	$339K	0.0%Prev: 0.0%	1,035 SH	Increased+1 SH
ANI Pharmaceuticals, Inc.	COM	$14.9M	0.5%Prev: 0.5%	188,830 SH	Increased+49,930 SH
Apple, Inc.	COM	$945K	0.0%Prev: 0.0%	3,476 SH	Increased+88 SH
Applied Optoelectronics Inc.	COM	$71.1M	2.6%Prev: 1.9%	2,039,641 SH	Increased+151,600 SH
Arcosa, Inc.	COM	$23.6M	0.9%Prev: 0.8%	221,600 SH	Increased
Arcutis Biotherapeutics, Inc.	COM	$23.5M	0.9%	808,400 SH	New
Argan, Inc	COM	$10.3M	0.4%Prev: 0.6%	32,971 SH	Decreased-27,600 SH
Artivion, Inc	COM	$9.9M	0.4%Prev: 0.3%	217,060 SH	Increased+5,260 SH
Assurant, Inc.	COM	$20.0M	0.7%Prev: 0.7%	83,000 SH	Increased
Atricure, Inc.	COM	$8.6M	0.3%Prev: 0.2%	217,992 SH	Increased+64,492 SH
AxoGen Inc.	COM	$11.0M	0.4%Prev: 0.2%	336,200 SH	Increased+8,100 SH
Backblaze, Inc.	COM	$2.6M	0.1%Prev: 0.2%	552,023 SH	Decreased+13,323 SH
Bank of New York Mellon Corp.	COM	$296K	0.0%Prev: 0.0%	2,553 SH	Increased-55 SH
Benchmark Electronics Inc	COM	$8.5M	0.3%	198,300 SH	New
Bioventus, Inc.	COM	$4.6M	0.2%Prev: 0.2%	616,614 SH	Increased+14,900 SH
Blue Bird Corporation	COM	$18.0M	0.7%Prev: 0.8%	382,638 SH	Decreased+9,238 SH
Boot Barn Hldgs, Inc.	COM	$9.5M	0.3%Prev: 0.3%	53,800 SH	Increased+11,700 SH
Box, Inc.	COM	$19.5M	0.7%Prev: 0.8%	652,320 SH	Decreased
BrightSpring Health Services	COM	$34.0M	1.2%Prev: 1.0%	908,000 SH	Increased
Build A Bear	COM	$8.2M	0.3%Prev: 0.2%	134,100 SH	Increased+42,500 SH
Calix, Inc.	COM	$12.9M	0.5%	244,600 SH	New
Camtek, Ltd.	COM	$23.3M	0.9%Prev: 0.9%	218,880 SH	Increased+5,300 SH
CarGurus, Inc.	COM	$19.9M	0.7%Prev: 0.7%	518,400 SH	Increased
Carpenter Technology Corp.	COM	$26.0M	1.0%Prev: 0.8%	82,611 SH	Increased
Catalyst Pharmaceuticals, Inc.	COM	$13.7M	0.5%Prev: 0.4%	586,970 SH	Increased+58,410 SH
Caterpillar, Inc.	COM	$256K	0.0%Prev: 0.0%	448 SH	Increased+22 SH
CECO Environmental Corp.	COM	$8.7M	0.3%Prev: 0.2%	145,508 SH	Increased+53,500 SH
Clean Harbors, Inc.	COM	$27.4M	1.0%Prev: 1.0%	116,870 SH	Increased+100 SH
Climb Global Solutions, Inc.	COM	$5.3M	0.2%Prev: 0.2%	51,960 SH	Increased+19,460 SH
Commvault Systems, Inc.	COM	$13.9M	0.5%Prev: 0.9%	110,900 SH	Decreased-17,700 SH
Core Natural Resources, Inc.	COM	$15.8M	0.6%	178,400 SH	New
CorMedix, Inc.	COM	$9.4M	0.3%Prev: 0.3%	805,115 SH	Increased+19,415 SH
Coursera, Inc.	COM	$5.9M	0.2%Prev: 0.3%	806,800 SH	Decreased+245,800 SH
CRA Int'l Inc.	COM	$7.2M	0.3%Prev: 0.3%	35,770 SH	Decreased+870 SH
Credo Technology Group	COM	$97.2M	3.6%Prev: 3.6%	675,388 SH	Increased+31,440 SH
Dana Inc.	COM	$18.9M	0.7%	796,500 SH	New
Dave, Inc.	COM	$13.0M	0.5%Prev: 0.3%	58,922 SH	Increased+13,300 SH
Digital Ocean Holdings, Inc.	COM	$37.5M	1.4%Prev: 1.0%	778,830 SH	Increased+6,830 SH
Diodes, Inc.	COM	$7.5M	0.3%Prev: 0.4%	151,900 SH	Decreased-66,800 SH
Ducommun Inc.	COM	$9.3M	0.3%Prev: 0.4%	98,100 SH	Increased+2,400 SH
Dutch Bros., Inc.	COM	$24.8M	0.9%Prev: 0.8%	404,500 SH	Increased
Encompass Health Corporation	COM	$38.1M	1.4%Prev: 1.7%	358,971 SH	Decreased+171 SH
EPlus, Inc.	COM	$9.7M	0.4%	110,898 SH	New
Eton Pharmaceuticals, Inc.	COM	$7.3M	0.3%Prev: 0.2%	431,300 SH	Increased+238,940 SH
Everus Construction Group	COM	$22.2M	0.8%Prev: 0.9%	259,800 SH	Decreased
Evolv Technologies Holdings	COM	$7.7M	0.3%Prev: 0.3%	1,077,900 SH	Increased+129,500 SH
Expro Group Holdings N.V.	COM	$6.0M	0.2%Prev: 0.2%	446,300 SH	Increased+10,800 SH
EZCorp, Inc.	COM	$12.2M	0.4%Prev: 0.5%	627,900 SH	Decreased-57,600 SH
Fabrinet	COM	$11.5M	0.4%Prev: 0.6%	25,200 SH	Decreased-20,700 SH
Fastly, Inc.	COM	$7.0M	0.3%	689,800 SH	New
FB Financial Corp.	COM	$8.9M	0.3%Prev: 0.3%	159,200 SH	Increased+35,700 SH
Federal Signal Corp.	COM	$18.1M	0.7%Prev: 0.8%	166,500 SH	Decreased
First Merchants Corporation	COM	$7.3M	0.3%Prev: 0.3%	196,000 SH	Decreased
FirstCash Holdings, Inc	COM	$20.9M	0.8%Prev: 0.6%	131,300 SH	Increased+33,500 SH
Flowserve Corporation	COM	$28.4M	1.0%Prev: 0.8%	409,941 SH	Increased+656 SH
Freshworks, Inc.	COM	$25.2M	0.9%Prev: 0.9%	2,054,470 SH	Increased-5,000 SH
Frontdoor, Inc.	COM	$35.2M	1.3%Prev: 1.6%	610,860 SH	Decreased
Futu Holdings Ltd.	COM	$1.8M	0.1%Prev: 0.1%	11,000 SH	Decreased
Genedx Holdings Corp.	COM	$25.9M	0.9%Prev: 0.8%	198,770 SH	Increased+4,850 SH
Genius Sports Ltd.	COM	$17.5M	0.6%Prev: 0.5%	1,585,900 SH	Increased+570,800 SH
Genpact Ltd.	COM	$24.4M	0.9%Prev: 0.8%	521,602 SH	Increased+4,802 SH
Globus Medical, Inc.-A	COM	$23.6M	0.9%	270,000 SH	New
Grand Canyon Education, Inc.	COM	$16.6M	0.6%Prev: 0.8%	99,800 SH	Decreased
Green Dot Corp. Cl A	COM	$9.8M	0.4%Prev: 0.5%	765,000 SH	Decreased-205,300 SH
H World Group Ltd.	COM	$1.1M	0.0%	24,000 SH	New
Halozyme Therapeutics, Inc.	COM	$7.9M	0.3%Prev: 0.3%	117,580 SH	Decreased
Hawkins, Inc.	COM	$6.6M	0.2%Prev: 0.3%	46,800 SH	Decreased+1,100 SH
HealthEquity Inc.	COM	$13.0M	0.5%Prev: 0.5%	141,580 SH	Decreased+1,500 SH
Huron Consulting Group, Inc.	COM	$7.2M	0.3%Prev: 0.2%	41,500 SH	Increased+1,000 SH
IBEX Ltd.	COM	$9.2M	0.3%Prev: 0.4%	241,800 SH	Decreased+5,800 SH
ICU Medical, Inc.	COM	$24.0M	0.9%Prev: 0.7%	168,040 SH	Increased+18,910 SH
Imax Corp.	COM	$24.1M	0.9%Prev: 0.7%	652,300 SH	Increased+72,700 SH
Impinj, Inc.	COM	$18.6M	0.7%Prev: 0.7%	107,120 SH	Decreased
Indivior Plc	COM	$15.2M	0.6%	424,941 SH	New
Interdigital, Inc.	COM	$9.0M	0.3%Prev: 0.5%	28,300 SH	Decreased-5,800 SH
Interface, Inc.	COM	$12.2M	0.4%Prev: 0.5%	435,800 SH	Decreased+10,500 SH
Irhythm Holdings, Inc.	COM	$21.2M	0.8%	119,700 SH	New
Johnson & Johnson	COM	$424K	0.0%Prev: 0.0%	2,050 SH	Increased+3 SH
JP Morgan Chase & Company Inc.	COM	$983K	0.0%Prev: 0.0%	3,052 SH	Decreased-69 SH
Kiniksa Pharmaceuticals, Ltd.	COM	$12.9M	0.5%Prev: 0.5%	312,800 SH	Increased+7,600 SH
Lattice Semiconductor Corporat	COM	$23.2M	0.8%Prev: 0.8%	314,636 SH	Increased+39,100 SH
LeMaitre Vascular, Inc.	COM	$9.4M	0.3%Prev: 0.4%	116,301 SH	Decreased+2,534 SH
Levi Strauss & Co.	COM	$20.6M	0.8%Prev: 0.8%	993,900 SH	Decreased+90,400 SH
Life Time Holdings, Inc.	COM	$28.2M	1.0%Prev: 0.9%	1,059,300 SH	Increased+192,900 SH
Lincoln EDL Svcs	COM	$7.5M	0.3%Prev: 0.3%	309,100 SH	Increased+7,500 SH
Lindblad Expeditions Holdings,	COM	$4.4M	0.2%Prev: 0.1%	306,800 SH	Increased+7,400 SH
Liquidia Corp.	COM	$11.4M	0.4%Prev: 0.3%	329,200 SH	Increased+8,000 SH
Littelfuse, Inc.	COM	$15.8M	0.6%Prev: 0.6%	62,300 SH	Decreased
LivaNova Plc	COM	$13.1M	0.5%Prev: 0.4%	212,300 SH	Increased+26,300 SH
LSI Industries Inc.	COM	$3.2M	0.1%Prev: 0.2%	173,400 SH	Decreased+4,200 SH
Lumentum Hldgs, Inc.	COM	$103.5M	3.8%Prev: 2.0%	280,930 SH	Increased-47,700 SH
M/I Homes, Inc.	COM	$9.6M	0.4%Prev: 0.4%	75,000 SH	Decreased+1,800 SH
Macom Technology Solutions	COM	$30.7M	1.1%Prev: 0.8%	178,960 SH	Increased+1,170 SH
Magnite, Inc.	COM	$10.3M	0.4%Prev: 0.4%	635,800 SH	Decreased+121,800 SH
Magnolia Oil & Gas Corp.	COM	$8.2M	0.3%Prev: 0.3%	376,300 SH	Decreased
Malibu Boats, Inc.	COM	$6.9M	0.3%Prev: 0.3%	244,100 SH	Decreased+5,900 SH
Mastercard, Inc.	COM	$378K	0.0%Prev: 0.0%	662 SH	Decreased-9 SH
Matador Resources Company	COM	$10.8M	0.4%Prev: 0.4%	253,900 SH	Decreased
Matrix Service Co.	COM	$2.7M	0.1%Prev: 0.1%	226,575 SH	Decreased+5,500 SH
McDonald's Corporation	COM	$261K	0.0%Prev: 0.0%	853 SH	Increased+1 SH
Mercury Systems, Inc.	COM	$30.2M	1.1%Prev: 1.2%	414,040 SH	Decreased+15,540 SH
Merit Medical System Inc	COM	$23.7M	0.9%Prev: 0.7%	268,760 SH	Increased+36,750 SH
Micron Technology	COM	$1.3M	0.0%	4,500 SH	New
Microsoft Corp.	COM	$1.3M	0.0%Prev: 0.1%	2,665 SH	Decreased
Mirion Technologies, Inc.	COM	$14.2M	0.5%	607,800 SH	New
National Vision Holdings, Inc.	COM	$20.3M	0.7%Prev: 0.7%	784,500 SH	Increased+189,600 SH
New York Times Co. Cl A	COM	$21.0M	0.8%Prev: 0.6%	302,700 SH	Increased+50,700 SH
Newmont Mining	COM	$287K	0.0%Prev: 0.0%	2,873 SH	Increased-298 SH
Nicolet Bankshares, Inc.	COM	$7.5M	0.3%Prev: 0.3%	61,700 SH	Decreased+1,500 SH
nLIGHT Inc.	COM	$13.4M	0.5%Prev: 0.3%	356,400 SH	Increased+90,400 SH
Nova Ltd.	COM	$37.2M	1.4%Prev: 1.4%	113,285 SH	Increased
NPK International, Inc.	COM	$6.1M	0.2%Prev: 0.2%	508,750 SH	Increased+12,250 SH
OneSpaWorld Holdings Limited	COM	$9.9M	0.4%Prev: 0.4%	476,890 SH	Increased+11,490 SH
Osi Systems, Inc.	COM	$25.9M	0.9%Prev: 1.0%	101,400 SH	Increased
Pagaya Technologies Ltd.	COM	$6.4M	0.2%Prev: 0.2%	305,600 SH	Increased+115,600 SH
Pediatrix Medical Group, Inc.	COM	$12.0M	0.4%Prev: 0.3%	559,987 SH	Increased+14,387 SH
Pegasystems Inc.	COM	$25.4M	0.9%Prev: 0.9%	424,840 SH	Increased+35,440 SH
Phibro Animal Health Corp	COM	$7.8M	0.3%	209,800 SH	New
Powell Industries Inc.	COM	$15.5M	0.6%Prev: 0.6%	48,700 SH	Increased+1,200 SH
Powerfleet, Inc.	COM	$5.8M	0.2%Prev: 0.2%	1,095,252 SH	Increased+26,452 SH
Precision Drilling Corp.	COM	$7.2M	0.3%Prev: 0.2%	99,500 SH	Increased+2,400 SH
Primoris Services Corp.	COM	$20.3M	0.7%Prev: 1.0%	163,300 SH	Decreased-29,100 SH
ProPetro Holding Corp.	COM	$9.0M	0.3%	947,900 SH	New
Q2 Holdings, Inc.	COM	$24.3M	0.9%Prev: 0.8%	336,860 SH	Increased+44,600 SH
Qualys, Inc.	COM	$14.3M	0.5%Prev: 0.4%	107,800 SH	Increased+23,800 SH
Radware, Ltd.	COM	$6.8M	0.2%Prev: 0.3%	281,500 SH	Decreased+6,800 SH
Rambus, Inc	COM	$42.5M	1.6%Prev: 2.0%	462,100 SH	Decreased-45,799 SH
Red Violet, Inc.	COM	$5.9M	0.2%Prev: 0.2%	102,800 SH	Increased+2,500 SH
Remitly Global, Inc.	COM	$13.8M	0.5%Prev: 0.6%	1,002,800 SH	Decreased
Resmed Inc.	COM	$349K	0.0%Prev: 0.0%	1,450 SH	Decreased
Rev Group, Inc.	COM	$8.4M	0.3%Prev: 0.3%	137,800 SH	Increased+3,300 SH
Rush Street Interactive, Inc.	COM	$27.4M	1.0%Prev: 0.9%	1,411,710 SH	Increased+220,150 SH
Sensient Technologies Corp.	COM	$17.7M	0.6%Prev: 0.5%	188,000 SH	Increased+53,800 SH
SharkNinja, Inc.	COM	$58.9M	2.2%Prev: 1.9%	526,310 SH	Increased+43,500 SH
Shopify, Inc.	COM	$2.1M	0.1%Prev: 0.1%	13,100 SH	Increased+3,100 SH
Silicon Motion Techn ADR	COM	$21.9M	0.8%Prev: 0.8%	236,300 SH	Increased+5,700 SH
SiTime Corporation	COM	$37.6M	1.4%Prev: 1.2%	106,396 SH	Increased
Skyward Specialty Ins Group	COM	$12.1M	0.4%Prev: 0.4%	237,500 SH	Increased+5,700 SH
Skywest Inc	COM	$38.4M	1.4%Prev: 1.3%	382,220 SH	Increased+51,430 SH
Solaris Energy Infrastructur	COM	$16.9M	0.6%Prev: 0.6%	366,900 SH	Increased
SPDR Gold Shares ETF	ETF	$268K	0.0%	675 SH	New
SPDR S&P 500 ETF Trust	ETF	$1.4M	0.1%	2,055 SH	New
SPX Technologies, Inc.	COM	$15.4M	0.6%Prev: 0.5%	76,900 SH	Increased
Super Group SGHC Ltd.	COM	$15.2M	0.6%	1,268,500 SH	New
Tactile Sys Technology, Inc.	COM	$5.8M	0.2%	199,100 SH	New
The Gorman-Rupp Co.	COM	$4.5M	0.2%Prev: 0.2%	93,200 SH	Increased+2,300 SH
The Travelers Co., Inc.	COM	$459K	0.0%Prev: 0.0%	1,581 SH	Decreased-89 SH
The Vita Coco Co., Inc.	COM	$12.4M	0.5%Prev: 0.4%	233,400 SH	Increased+5,100 SH
Turning PT Brands, Inc.	COM	$11.2M	0.4%Prev: 0.4%	103,500 SH	Increased+2,500 SH
Tutor Perini Corp.	COM	$26.0M	0.9%Prev: 0.9%	387,200 SH	Increased+9,400 SH
Ultra Clean Holdings	COM	$15.9M	0.6%Prev: 0.6%	628,500 SH	Decreased+15,200 SH
Urban Outfitters, Inc.	COM	$21.6M	0.8%Prev: 0.6%	286,400 SH	Increased+52,100 SH
Veracyte, Inc.	COM	$30.6M	1.1%Prev: 0.9%	726,740 SH	Increased+5,050 SH
Viavi Solutions, Inc.	COM	$9.1M	0.3%	508,100 SH	New
Vistance Networks, Inc.	COM	$17.4M	0.6%	960,912 SH	New
VSE Corp.	COM	$5.8M	0.2%Prev: 0.3%	33,400 SH	Decreased-11,200 SH
Wal Mart Stores Inc.	COM	$244K	0.0%Prev: 0.0%	2,187 SH	Increased-170 SH
Waystar Holding Corp.	COM	$27.5M	1.0%Prev: 1.2%	840,600 SH	Decreased+4,050 SH
Weave Communications, Inc.	COM	$7.6M	0.3%Prev: 0.3%	999,080 SH	Increased+13,130 SH
Wells Fargo Co New Perp Pfd	PFD	$273K	0.0%	225 SH	New
Workiva, Inc.	COM	$11.0M	0.4%	127,500 SH	New
Zeta Global Holdings Corp.	COM	$15.6M	0.6%Prev: 0.6%	767,020 SH	Increased+5,820 SH
Zurn Elkay Water Solutions Cor	COM	$12.4M	0.5%Prev: 0.5%	266,000 SH	Decreased

Sold (vs prior filing)

ADMA Biologics, Inc. — $39.8M
Alpha & Omega Semiconductor — $7.6M
Aris Water Solutions, Inc. — $547K
AvePoint, Inc. — $4.4M
Badger Meter — $13.0M
Cadence Design System, Inc. — $2.6M
Cellebrite DI Ltd. — $7.7M
Commerce Bancshares, Inc. — $10.6M
CommScope Holding Company, Inc — $12.2M
Exlservice Holdings — $8.6M
Five9, Inc. — $9.6M
Hesai Group — $787K
Insteel Industries Inc. — $5.1M
Irhythm Technologies Inc — $14.0M
Itron Inc — $35.4M
Limbach Hldgs, Inc. — $8.1M
Natural Grocers by Vitamin Cot — $8.8M
OneSpan, Inc. — $10.2M
Parsons Corp. — $22.6M
PDD Holdings Inc. ADR — $925K
… and 8 more

All filings

Open a filing on Jive Data

Filing Date	Quarter	Form	Accession	Portfolio	Filing
Feb 17, 2026	Q4 2025	13F-HR	0001213900-26-017101	$2.73B	View
Nov 17, 2025	Q3 2025	13F-HR	0001213900-25-111225	$2.61B	View
Aug 14, 2026	Q2 2026