OBERWEIS ASSET MANAGEMENT INC/

LISLE, IL · CIK 937886 · 13F filing filed 2026-08-14

SEC-registered investment adviser since 1990 · corporation

Assets managed$5.1bn
Staff31 · 17 in investment roles
Main clients (by assets)Mutual funds and ETFs 64%, State and local governments 28%, Companies 5%
Private funds1 · $48.8m gross assets
Websiteoberweis.net
Form ADV · 2026-09-08SEC adviser record

Legal entityOBERWEIS ASSET MANAGEMENT, INC. (US)

Kindmutual funds
Others nearbyLisle, IL
FamilyOBERWEIS ASSET MANAGEMENT INC/ · 2 related pages

As an employer

Offices in1 country
Private fundsother private 1

$4.8bn reported value +42.9% vs Q1 2026

176positions

26.6%in top 10

23 new 113 added 27 reduced 27 sold out vs Q1 2026

Holdings, Q2 2026

The small lines show how much was held over the last 4 quarters (adjusted for stock splits).

#	Security	Ticker	Shares	Value	% of portfolio	Change	Shares change
1	CREDO TECHNOLOGY GROUP HOLDI ORDINARY SHARES CRDO	CRDO	1,013,428	$275.6m5.69%	5.69%	Reduced -8.5k	-8,540 -0.8%
2	APPLIED OPTOELECTRONICS INC COM AAOI	AAOI	1,791,127	$265.4m5.48%	5.48%	Reduced -558.8k	-558,842 -23.8%
3	DIGITALOCEAN HLDGS INC COM DOCN	DOCN	930,005	$146.0m3.02%	3.02%	Added +2.5k	+2,500 0.3%
4	SILICON MOTION TECHNOLOGY CO SPONSORED ADR SIMO	SIMO	316,350	$105.4m2.18%	2.18%	Added +33.8k	+33,800 12.0%
5	ULTRA CLEAN HLDGS INC COM UCTT	UCTT	647,276	$92.3m1.91%	1.91%	Added +6.8k	+6,800 1.1%
6	SHARKNINJA INC COM SHS SN	SN	593,500	$90.4m1.87%	1.87%	Reduced -6.5k	-6,470 -1.1%
7	SITIME CORP COM SITM	SITM	119,501	$89.1m1.84%	1.84%	Added +220	+220 0.2%
8	BRIGHTSPRING HEALTH SVCS INC COM BTSG	BTSG	1,185,280	$82.7m1.71%	1.71%	Added +26.3k	+26,310 2.3%
9	HINGE HEALTH INC CL A HNGE	HNGE	855,476	$71.0m1.47%	1.47%	Added +389.7k	+389,710 83.7%
10	RAMBUS INC DEL COM RMBS	RMBS	527,016	$70.0m1.45%	1.45%	Added +700	+700 0.1%
11	MACOM TECH SOLUTIONS HLDGS I COM MTSI	MTSI	179,356	$68.2m1.41%	1.41%	Reduced -36.5k	-36,530 -16.9%
12	LUMENTUM HLDGS INC COM LITE	LITE	72,185	$61.9m1.28%	1.28%	Reduced -194.0k	-194,037 -72.9%
13	LATTICE SEMICONDUCTOR CORP COM LSCC	LSCC	391,816	$59.9m1.24%	1.24%	Added +17.4k	+17,380 4.6%
14	NOVA LTD COM NVMI	NVMI	108,675	$59.0m1.22%	1.22%	Reduced -29.3k	-29,280 -21.2%
15	CARPENTER TECHNOLOGY CORP COM CRS	CRS	93,273	$57.5m1.19%	1.19%	Reduced -1.2k	-1,160 -1.2%
16	FRONTDOOR INC COM FTDR	FTDR	719,060	$55.8m1.15%	1.15%	Added +1.1k	+1,100 0.1%
17	EVERUS CONSTR GROUP COM ECG	ECG	328,183	$54.5m1.13%	1.13%	Added +1.6k	+1,650 0.5%
18	VERACYTE INC COM VCYT	VCYT	877,734	$51.5m1.07%	1.07%	Added +37.9k	+37,900 4.5%
19	POWELL INDS INC COM POWL	POWL	179,521	$51.4m1.06%	1.06%	Added +77.0k	+77,050 75.2%
20	LIFE TIME GROUP HOLDINGS INC COMMON STOCK LTH	LTH	1,189,620	$48.6m1.00%	1.00%	Added +29.1k	+29,120 2.5%
21	RUSH STREET INTERACTIVE INC COM RSI	RSI	1,627,930	$48.4m1.00%	1.00%	Added +193.4k	+193,370 13.5%
22	MERCURY SYS INC COM MRCY	MRCY	392,723	$48.0m0.99%	0.99%	Added +1.7k	+1,700 0.4%
23	DUTCH BROS INC CL A BROS	BROS	656,093	$47.1m0.97%	0.97%	Added +57.6k	+57,600 9.6%
24	CLEAN HARBORS INC COM CLH	CLH	153,475	$45.9m0.95%	0.95%	Added +9.1k	+9,120 6.3%
25	SOLARIS ENERGY INFRAS INC COM CL A SEI	SEI	564,581	$45.4m0.94%	0.94%	Added +32.7k	+32,692 6.2%
26	DIODES INC COM DIOD	DIOD	413,750	$45.3m0.94%	0.94%	Added +189.4k	+189,450 84.5%
27	ARCOSA INC COM ACA	ACA	295,450	$42.9m0.89%	0.89%	Added +27.8k	+27,750 10.4%
28	BLUE BIRD CORP COM BLBD	BLBD	529,838	$41.8m0.86%	0.86%	Added +140.6k	+140,600 36.1%
29	CAMTEK LTD ORD CAMT	CAMT	253,380	$41.3m0.85%	0.85%	Added +30.6k	+30,600 13.7%
30	LIVANOVA PLC SHS LIVN	LIVN	500,150	$41.1m0.85%	0.85%	Added +178.2k	+178,250 55.4%
31	AMERICAN SUPERCONDUCTOR CORP SHS NEW AMSC	AMSC	987,500	$41.0m0.85%	0.85%	Added +137.6k	+137,600 16.2%
32	MAXLINEAR INC COM MXL	MXL	319,500	$40.9m0.85%	0.85%	New
33	GLOBUS MED INC CL A GMED	GMED	512,100	$40.5m0.84%	0.84%	Added +119.9k	+119,900 30.6%
34	NOVANTA INC COM NOVT	NOVT	244,260	$39.6m0.82%	0.82%	New
35	SKYWEST INC COM SKYW	SKYW	383,799	$38.1m0.79%	0.79%	Reduced -8.7k	-8,700 -2.2%
36	VIAVI SOLUTIONS INC COM VIAV	VIAV	793,600	$37.9m0.78%	0.78%	Added +200.4k	+200,400 33.8%
37	MOOG INC CL A MOG.A	MOG.A	86,735	$36.8m0.76%	0.76%	Added +41.8k	+41,825 93.1%
38	LITTELFUSE INC COM LFUS	LFUS	79,800	$36.3m0.75%	0.75%	Added +8.0k	+8,000 11.1%
39	ARCUTIS BIOTHERAPEUTICS INC COM ARQT	ARQT	1,372,941	$36.0m0.74%	0.74%	Added +7.0k	+7,000 0.5%
40	FIRSTCASH HOLDINGS INC COM FCFS	FCFS	166,105	$35.9m0.74%	0.74%	Added +440	+440 0.3%
41	BILLIONTOONE INC CL A BLLN	BLLN	299,030	$35.9m0.74%	0.74%	New
42	DANA INC COM DAN	DAN	1,318,300	$35.9m0.74%	0.74%	Reduced -293.2k	-293,200 -18.2%
43	ELEMENT SOLUTIONS INC COM ESI	ESI	740,100	$35.3m0.73%	0.73%	New
44	AAR CORP COM AIR	AIR	246,325	$35.2m0.73%	0.73%	Added +1.2k	+1,200 0.5%
45	REMITLY GLOBAL INC COM RELY	RELY	1,570,400	$35.2m0.73%	0.73%	Added +116.1k	+116,100 8.0%
46	ICU MED INC COM ICUI	ICUI	237,050	$34.8m0.72%	0.72%	Added +33.3k	+33,340 16.4%
47	FEDERAL SIGNAL CORP COM FSS	FSS	269,084	$34.6m0.71%	0.71%	Added +1.4k	+1,450 0.5%
48	OUSTER INC COM NEW OUST	OUST	545,810	$34.1m0.71%	0.71%	New
49	LEVI STRAUSS & CO NEW CL A COM STK LEVI	LEVI	1,358,100	$33.7m0.70%	0.70%	Added +190.8k	+190,800 16.4%
50	MERIT MED SYS INC COM MMSI	MMSI	473,409	$32.8m0.68%	0.68%	Added +49.2k	+49,200 11.6%
51	ASSURANT INC COM AIZ	AIZ	122,100	$32.8m0.68%	0.68%	Added +19.8k	+19,800 19.4%
52	WAYSTAR HLDG CORP COM WAY	WAY	1,589,364	$32.6m0.67%	0.67%	Added +421.9k	+421,890 36.1%
53	CECO ENVIRONMENTAL CORP COM CECO	CECO	358,072	$32.5m0.67%	0.67%	Added +223.0k	+223,040 165.2%
54	LIQUIDIA CORPORATION COM NEW LQDA	LQDA	406,400	$32.4m0.67%	0.67%	Added +34.3k	+34,300 9.2%
55	ENCOMPASS HEALTH CORP COM EHC	EHC	316,886	$32.0m0.66%	0.66%	Added +27.4k	+27,401 9.5%
56	INDIVIOR PHARMACEUTICALS INC COM INDV	INDV	779,188	$32.0m0.66%	0.66%	Added +125.8k	+125,775 19.2%
57	COGNEX CORP COM CGNX	CGNX	427,820	$31.0m0.64%	0.64%	New
58	GRANITE CONSTR INC COM GVA	GVA	193,090	$30.5m0.63%	0.63%	New
59	PDF SOLUTIONS INC COM PDFS	PDFS	426,400	$30.2m0.62%	0.62%	New
60	ENVISTA HOLDINGS CORPORATION COM NVST	NVST	1,120,782	$29.5m0.61%	0.61%	Added +455.4k	+455,382 68.4%
61	DAVE INC CLASS A COM NEW DAVE	DAVE	78,902	$29.4m0.61%	0.61%	Added +12.2k	+12,200 18.3%
62	AMBARELLA INC SHS AMBA	AMBA	342,254	$29.4m0.61%	0.61%	Added +47.1k	+47,069 15.9%
63	NLIGHT INC COM LASR	LASR	413,310	$28.8m0.59%	0.59%	Added +50.3k	+50,300 13.9%
64	MYR GROUP INC DEL COM MYRG	MYRG	54,190	$27.1m0.56%	0.56%	New
65	ADAPTIVE BIOTECHNOLOGIES COR COM ADPT	ADPT	1,258,751	$27.0m0.56%	0.56%	Added +451.8k	+451,800 56.0%
66	LEONARDO DRS INC COM DRS	DRS	628,486	$26.8m0.55%	0.55%	Added +179.0k	+178,986 39.8%
67	TUTOR PERINI CORP COM TPC	TPC	323,200	$26.8m0.55%	0.55%	Reduced -70.7k	-70,700 -17.9%
68	KODIAK GAS SVCS INC COM KGS	KGS	355,870	$26.7m0.55%	0.55%	New
69	KINIKSA PHARMACEUTICALS INTL ORD SHS CL A KNSA	KNSA	413,034	$26.4m0.55%	0.55%	Added +94.4k	+94,400 29.6%
70	CHIME FINL INC COM SHS CL A CHYM	CHYM	1,268,330	$26.0m0.54%	0.54%	Added +232.8k	+232,800 22.5%
71	ALIGNMENT HEALTHCARE INC COM ALHC	ALHC	1,089,600	$25.9m0.54%	0.54%	Added +123.0k	+123,000 12.7%
72	HALOZYME THERAPEUTICS INC COM HALO	HALO	321,030	$25.1m0.52%	0.52%	Added +101.1k	+101,100 46.0%
73	IRHYTHM TECHNOLOGIES INC COM IRTC	IRTC	202,004	$24.0m0.50%	0.50%	Added +46.0k	+46,000 29.5%
74	AMERIS BANCORP COM ABCB	ABCB	264,600	$23.9m0.49%	0.49%	Added +1.1k	+1,100 0.4%
75	ZURN ELKAY WATER SOLNS CORP COM ZWS	ZWS	468,453	$23.7m0.49%	0.49%	Added +116.3k	+116,270 33.0%
76	OSI SYSTEMS INC COM OSIS	OSIS	107,143	$23.4m0.48%	0.48%	Added +550	+550 0.5%
77	OMADA HEALTH INC COM OMDA	OMDA	1,048,800	$23.0m0.48%	0.48%	New
78	URBAN OUTFITTERS INC COM URBN	URBN	316,192	$22.4m0.46%	0.46%	Added +1.4k	+1,400 0.4%
79	ANI PHARMACEUTICALS INC COM ANIP	ANIP	265,306	$22.0m0.45%	0.45%	Added +43.9k	+43,920 19.8%
80	EZCORP INC CL A NON VTG EZPW	EZPW	631,800	$21.8m0.45%	0.45%	Reduced -7.6k	-7,600 -1.2%
81	CORE NATURAL RESOURCES INC COM SHS CNR	CNR	271,170	$21.7m0.45%	0.45%	Added +1.4k	+1,370 0.5%
82	DUCOMMUN INC DEL COM DCO	DCO	113,800	$21.1m0.44%	0.44%	Added +13.9k	+13,900 13.9%
83	SKYWARD SPECIALTY INS GROUP COM SKWD	SKWD	359,100	$21.0m0.43%	0.43%	Added +32.0k	+32,000 9.8%
84	WILLDAN GROUP INC COM WLDN	WLDN	262,700	$20.8m0.43%	0.43%	New
85	A10 NETWORKS INC COM ATEN	ATEN	552,000	$20.6m0.43%	0.43%	Added +47.7k	+47,700 9.5%
86	HEALTHEQUITY INC COM HQY	HQY	228,291	$20.6m0.43%	0.43%	Added +61.6k	+61,650 37.0%
87	SUPER GROUP SGHC LIMITED ORD SHS SGHC	SGHC	1,521,000	$20.6m0.43%	0.43%	Added +6.6k	+6,600 0.4%
88	SPX TECHNOLOGIES INC COM SPXC	SPXC	83,811	$20.5m0.42%	0.42%	Added +370	+370 0.4%
89	FORMFACTOR INC COM FORM	FORM	127,330	$20.4m0.42%	0.42%	New
90	WATTS WATER TECHNOLOGIES INC CL A WTS	WTS	50,840	$19.9m0.41%	0.41%	New
91	OPENLANE INC COM OPLN	OPLN	480,580	$19.8m0.41%	0.41%	New
92	Q2 HLDGS INC COM QTWO	QTWO	410,409	$19.7m0.41%	0.41%	Added +15.8k	+15,780 4.0%
93	BOX INC CL A BOX	BOX	743,000	$19.7m0.41%	0.41%	Reduced -28.5k	-28,520 -3.7%
94	VSE CORP COM VSEC	VSEC	86,098	$19.7m0.41%	0.41%	Added +52.1k	+52,090 153.2%
95	BENCHMARK ELECTRS INC COM BHE	BHE	198,300	$19.6m0.40%	0.40%	Reduced -3.6k	-3,600 -1.8%
96	NEW YORK TIMES CO CL A NYT	NYT	277,050	$19.4m0.40%	0.40%	Added +65.4k	+65,400 30.9%
97	ADVANCED ENERGY INDS COM AEIS	AEIS	49,423	$18.4m0.38%	0.38%	Added +240	+240 0.5%
98	ETON PHARMACEUTICALS INC COM ETON	ETON	501,600	$18.2m0.38%	0.38%	Added +62.3k	+62,300 14.2%
99	AXOGEN INC COM AXGN	AXGN	388,194	$17.9m0.37%	0.37%	Added +45.8k	+45,800 13.4%
100	FABRINET SHS FN	FN	30,373	$17.1m0.35%	0.35%	Added +110	+110 0.4%

Sold out since Q1 2026

Security	Ticker	Shares held before	Value then
FLOWSERVE CORP FLS	FLS	434,681	$32.0m434.7k shares
PRIMORIS SVCS CORP PRIM	PRIM	166,100	$23.8m166.1k shares
GENPACT LIMITED G	G	606,832	$22.6m606.8k shares
ALPHATEC HLDGS INC ATEC	ATEC	1,908,293	$20.8m1.9m shares
NATIONAL VISION HLDGS INC EYE	EYE	797,780	$20.7m797.8k shares
PEGASYSTEMS INC PEGA	PEGA	455,290	$19.4m455.3k shares
AMERICAN EAGLE OUTFITTERS IN AEO	AEO	1,044,900	$17.4m1.0m shares
GENEDX HOLDINGS CORP WGS	WGS	261,370	$16.8m261.4k shares
SHAKE SHACK INC SHAK	SHAK	187,570	$16.6m187.6k shares
MIRION TECHNOLOGIES INC MIR	MIR	744,267	$13.8m744.3k shares
IMPINJ INC PI	PI	118,086	$12.1m118.1k shares
QUALYS INC QLYS	QLYS	118,900	$10.4m118.9k shares
ARTIVION INC AORT	AORT	221,122	$8.1m221.1k shares
EXPRO GROUP HOLDINGS NV 96779EUR	96779EUR	454,600	$7.9m454.6k shares
THERMON GROUP HLDGS INC		154,700	$7.8m154.7k shares
LINCOLN EDL SVCS CORP LINC	LINC	188,447	$7.7m188.4k shares
CRA INTL INC CRAI	CRAI	36,470	$5.9m36.5k shares
HURON CONSULTING GROUP INC HURN	HURN	42,300	$5.4m42.3k shares
TACTILE SYS TECHNOLOGY INC TCMD	TCMD	202,839	$5.3m202.8k shares
COURSERA INC COUR	COUR	821,800	$4.8m821.8k shares
BLACK ROCK COFFEE BAR INC BRCB	BRCB	365,600	$4.7m365.6k shares
CLIMB GLOBAL SOLUTIONS INC CLMB	CLMB	211,840	$4.2m211.8k shares
FUTU HLDGS LTD FUTU	FUTU	4,500	$615.4k4.5k shares
WEAVE COMMUNICATIONS INC WEAV	WEAV	72,830	$336.5k72.8k shares
SPDR GOLD TR GLD	GLD	675	$290.4k675 shares