OBERWEIS ASSET MANAGEMENT INC/ Q1 2021 Filing

Filed May 17, 2021

Portfolio Value

$488.9B

Holdings

170

Report Date

Q1 2021

Filing Type

13F-HR

All Holdings (170 positions)

#	Stock	Shares	Value	% Portfolio
1	CSTMConstellium NV Cl A	6,203,397	$91.2B	18.65%
2	FVRRFiverr Intl Ltd.	339,624	$73.8B	15.09%
3	KRNTKornit Digital Ltd.	416,851	$41.3B	8.45%
4	DAVAEndava Plc Ads	473,031	$40.1B	8.19%
5	SESea Ltd	50,063	$11.2B	2.29%
6	—ChannelAdvisor Corporation	427,900	$10.1B	2.06%
7	ORGOOrganogenesis Hlgs, Inc.	487,420	$8.9B	1.82%
8	UPWKUpwork, Inc.	185,370	$8.3B	1.70%
9	ATECAlphatec Hldgs Inc.	435,460	$6.9B	1.41%
10	SYNASynaptics, Inc.	49,300	$6.7B	1.37%
11	CSTLCastle Biosciences, Inc.	97,070	$6.6B	1.36%
12	SSTKShutterstock, Inc.	71,169	$6.3B	1.30%
13	COHRII-VI Inc.	82,960	$5.7B	1.16%
14	DECKDeckers Outdoor Corp.	16,120	$5.3B	1.09%
15	INMDInmode Ltd.	72,160	$5.2B	1.07%
16	TUPTupperware Corp.	194,440	$5.1B	1.05%
17	UCTTUltra Clean Holdings	80,210	$4.7B	0.95%
18	CDNACareDx, Inc.	65,840	$4.5B	0.92%
19	VNET21Vianet Group, Inc. - ADR	131,800	$4.3B	0.87%
20	BJBJs Wholesale Club Holdings, I	86,830	$3.9B	0.80%
21	MBUUMalibu Boats, Inc.	45,760	$3.6B	0.75%
22	MODNEURModel N, Inc.	94,640	$3.3B	0.68%
23	SHOPShopify, Inc.	2,920	$3.2B	0.66%
24	AVNWAviat Networks, Inc.	42,500	$3.0B	0.62%
25	ACLSAxcelis Technologies	72,380	$3.0B	0.61%
26	HALOHalozyme Therapeutics, Inc.	68,900	$2.9B	0.59%
27	CDNSCadence Design System, Inc.	19,424	$2.7B	0.54%
28	DOOREURMasonite Intl Corp.	22,795	$2.6B	0.54%
29	BILIBilibili, Inc. Spon ADR	24,500	$2.6B	0.54%
30	—Golden Nugget Online Gaming, I	175,400	$2.4B	0.48%
31	ANGOAngiodynamics, Inc.	98,300	$2.3B	0.47%
32	AMRCAmeresco, Inc.	43,008	$2.1B	0.43%
33	RPDRapid7, Inc.	26,280	$2.0B	0.40%
34	MXMagnachip Semiconductor Corp.	72,300	$1.8B	0.37%
35	—Vonage Hldgs Corp	151,210	$1.8B	0.37%
36	BOOTBoot Barn Hldgs, Inc.	28,400	$1.8B	0.36%
37	SPYSPDR S&P 500 ETF Trust	4,377	$1.7B	0.35%
38	ZM3Zumiez Inc.	40,300	$1.7B	0.35%
39	TREXTrex Company, Inc.	18,240	$1.7B	0.34%
40	PPHMEURAvid Bioservices, Inc.	86,400	$1.6B	0.32%
41	TPDTempur Sealy International, In	42,865	$1.6B	0.32%
42	HSIHeidrick & Struggles	43,500	$1.6B	0.32%
43	MHOM/I Homes, Inc.	26,300	$1.6B	0.32%
44	VRTVEURVeritiv Corp.	36,000	$1.5B	0.31%
45	DBDEURDiebold, Inc.	104,300	$1.5B	0.30%
46	ACHCAcadia Healthcare Co., Inc.	25,625	$1.5B	0.30%
47	MGNIMagnite, Inc.	34,967	$1.5B	0.30%
48	ROFKForce, Inc.	27,000	$1.4B	0.30%
49	CVGICommercial Vehicle Group	143,900	$1.4B	0.28%
50	CRAICRA Int'l Inc.	18,500	$1.4B	0.28%
51	CAMTCamtek, Ltd.	45,980	$1.4B	0.28%
52	XXYCross Country Healthcare, Inc.	109,900	$1.4B	0.28%
53	—LiqTech International, Inc	168,729	$1.4B	0.28%
54	UPLDUpland Software, Inc.	28,600	$1.4B	0.28%
55	RDNTRadnet, Inc.	62,000	$1.3B	0.28%
56	CROXCrocs, Inc.	16,470	$1.3B	0.27%
57	COHUCohu, Inc.	31,676	$1.3B	0.27%
58	PRFTUSDPerficient Inc.	22,500	$1.3B	0.27%
59	FLLFull House Resorts, Inc.	152,543	$1.3B	0.27%
60	—VOXX International Corporation	67,400	$1.3B	0.26%
61	MXLMaxlinear, Inc. Class A	37,050	$1.3B	0.26%
62	APPSDigital Turbine, Inc.	15,075	$1.2B	0.25%
63	MOVMovado Group, Inc.	42,500	$1.2B	0.25%
64	CLVTrip.com Group Limited	30,000	$1.2B	0.24%
65	VCRAUSDVocera Communications, Inc.	30,826	$1.2B	0.24%
66	—Entravision Communications	293,300	$1.2B	0.24%
67	MBWMMercantile Bank Corp.	36,472	$1.2B	0.24%
68	DSKEUSDDaseke, Inc.	137,600	$1.2B	0.24%
69	HIMXHiMax Technolgies ADR	85,000	$1.2B	0.24%
70	PDDPinduoduo Inc.	8,500	$1.1B	0.23%
71	BLDRBuilders Firstsource	22,900	$1.1B	0.22%
72	—EnPro Industries, Inc.	12,400	$1.1B	0.22%
73	FLXSFlexsteel Inds, Inc.	30,000	$1.0B	0.21%
74	FTCHQFarfetch Ltd.	19,300	$1.0B	0.21%
75	RESRPC, Inc.	189,400	$1.0B	0.21%
76	SHYFShyft Group, Inc.	27,400	$1.0B	0.21%
77	HCKTHackett Group, Inc.	62,000	$1.0B	0.21%
78	GFFGriffon Corp.	36,800	$1.0B	0.20%
79	NOTVInotiv, Inc.	50,000	$1.0B	0.20%
80	COLLCollegium Pharmaceutical, Inc.	41,200	$976.0M	0.20%
81	STIMNeuronetics, Inc.	78,500	$971.0M	0.20%
82	ALNTAllied Motion Technologies	18,600	$955.0M	0.20%
83	EIGEmployers Holdings, Inc.	22,000	$947.0M	0.19%
84	OOMAOOMA Inc.	59,400	$941.0M	0.19%
85	CEVACeva Inc.	16,600	$932.0M	0.19%
86	EXTRExtreme Networks, Inc.	106,200	$929.0M	0.19%
87	ABT2EURAbsolute Software Corp.	66,300	$920.0M	0.19%
88	DQDaqo New Energy Corp.	12,000	$906.0M	0.19%
89	AAPLApple, Inc.	7,413	$905.0M	0.19%
90	—Luna Innovations	85,000	$895.0M	0.18%
91	VPGVishay Precision Group	29,000	$893.0M	0.18%
92	JOUTJohnson Outdoors, Inc.	6,000	$857.0M	0.18%
93	RBBNRibbon Communications, Inc.	101,400	$832.0M	0.17%
94	—Antares Pharma, Inc.	200,600	$824.0M	0.17%
95	PTENPatterson-Uti Energy, Inc.	114,000	$813.0M	0.17%
96	FFWMFirst Foundation Inc.	32,800	$769.0M	0.16%
97	STRTStrattec Security Corp.	16,100	$755.0M	0.15%
98	MYRGMYR Group, Inc.	10,100	$724.0M	0.15%
99	IMXIInternational Money Express, I	48,000	$720.0M	0.15%
100	TMETencent Music Entertainment	35,000	$717.0M	0.15%

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