OBERWEIS ASSET MANAGEMENT INC/ Q1 2023 Filing

Filed May 15, 2023

Portfolio Value

$644.5M

Holdings

174

Report Date

Q1 2023

Filing Type

13F-HR

All Holdings (174 positions)

#	Stock	Shares	Value	% Portfolio
1	CSTMConstellium NV Cl A	4,553,786	$69.0M	10.71%
2	ACLSAxcelis Technologies	271,989	$36.0M	5.59%
3	AEHRAehr Test Systems	699,108	$21.0M	3.26%
4	PIImpinj, Inc.	146,275	$19.0M	2.95%
5	PERIPerion Network, Ltd.	387,170	$15.0M	2.33%
6	LNTHLantheus Hldgs Inc.	178,540	$14.0M	2.17%
7	CROXCrocs, Inc.	105,350	$13.0M	2.02%
8	DECKDeckers Outdoor Corp.	28,280	$12.0M	1.86%
9	ATECAlphatec Hldgs Inc.	678,530	$10.0M	1.55%
10	VRTVEURVeritiv Corp.	67,490	$9.0M	1.40%
11	TMDXTransMedics Group, Inc.	108,300	$8.0M	1.24%
12	BDCBelden, Inc.	92,672	$8.0M	1.24%
13	CLHClean Harbors, Inc.	50,835	$7.0M	1.09%
14	ICFIICF International, Inc.	63,400	$6.0M	0.93%
15	VCVisteon Corp.	39,400	$6.0M	0.93%
16	AMPHAmphastar Pharmaceuticals, Inc	178,200	$6.0M	0.93%
17	HALOHalozyme Therapeutics, Inc.	164,040	$6.0M	0.93%
18	CIENCiena Corporation	118,305	$6.0M	0.93%
19	OSPNOneSpan, Inc.	361,300	$6.0M	0.93%
20	G2CEveri Hldgs, Inc.	301,300	$5.0M	0.78%
21	ALGMAllegro MicroSystems, Inc.	123,500	$5.0M	0.78%
22	AXNX*Axonics, Inc.	95,740	$5.0M	0.78%
23	EVHEvolent Health, Inc.	167,710	$5.0M	0.78%
24	SYNASynaptics, Inc.	40,260	$4.0M	0.62%
25	PRKSSeaWorld Entertainment Inc.	80,800	$4.0M	0.62%
26	MODNEURModel N, Inc.	146,240	$4.0M	0.62%
27	CBTCabot Corp.	60,351	$4.0M	0.62%
28	TCMDTactile Sys Technology, Inc.	259,550	$4.0M	0.62%
29	INMDInmode Ltd.	129,000	$4.0M	0.62%
30	FNFabrinet	40,145	$4.0M	0.62%
31	VCYTVeracyte, Inc.	212,180	$4.0M	0.62%
32	UCTTUltra Clean Holdings	132,700	$4.0M	0.62%
33	BELFBBel Fuse, Inc.	121,500	$4.0M	0.62%
34	RESRPC, Inc.	614,785	$4.0M	0.62%
35	MXLMaxlinear, Inc. Class A	140,460	$4.0M	0.62%
36	CECOCECO Environmental Corp.	222,600	$3.0M	0.47%
37	HAEHaemonetics Corp.	36,900	$3.0M	0.47%
38	ATENA10 Networks, Inc.	213,700	$3.0M	0.47%
39	SLABSilicon Laboratories, Inc.	20,810	$3.0M	0.47%
40	FMFFormfactor Inc.	101,500	$3.0M	0.47%
41	MMSIMerit Medical System Inc	43,800	$3.0M	0.47%
42	NRDSNerdWallet, Inc.	229,700	$3.0M	0.47%
43	CALXCalix, Inc.	61,100	$3.0M	0.47%
44	PLYAPlaya Hotels & Resorts N.V.	383,200	$3.0M	0.47%
45	VVXV2X, Inc.	77,800	$3.0M	0.47%
46	CAMTCamtek, Ltd.	117,680	$3.0M	0.47%
47	EZPWEZCorp, Inc.	371,500	$3.0M	0.47%
48	CHEFThe Chefs Warehouse, Inc.	103,600	$3.0M	0.47%
49	SITMSiTime Corporation	21,800	$3.0M	0.47%
50	FELEFranklin Electric	34,500	$3.0M	0.47%
51	ADMAADMA Biologics, Inc.	1,169,500	$3.0M	0.47%
52	FSSFederal Signal Corp.	58,300	$3.0M	0.47%
53	MGPIMGP Ingredients, Inc.	31,950	$3.0M	0.47%
54	IPARInter Parfums	24,400	$3.0M	0.47%
55	AYXEURAlteryx, Inc. Com Cl A	56,350	$3.0M	0.47%
56	OPCHOption Care Health Inc.	97,400	$3.0M	0.47%
57	STRLSterling Construction Co., Inc	97,900	$3.0M	0.47%
58	EXTRExtreme Networks, Inc.	201,000	$3.0M	0.47%
59	MTSIMacom Technology Solutions	44,100	$3.0M	0.47%
60	MMSMaximus, Inc.	40,800	$3.0M	0.47%
61	AVNWAviat Networks, Inc.	94,507	$3.0M	0.47%
62	TMCITreace Medical Concepts, Inc.	154,300	$3.0M	0.47%
63	SOYSunOpta, Inc.	420,800	$3.0M	0.47%
64	ALSNAllison Transmission Holdings,	66,400	$3.0M	0.47%
65	BOOTBoot Barn Hldgs, Inc.	41,200	$3.0M	0.47%
66	CDNSCadence Design System, Inc.	17,700	$3.0M	0.47%
67	NEWREURNew Relic, Inc.	29,300	$2.0M	0.31%
68	CALYTopgolf Callaway Brands Corp.	138,300	$2.0M	0.31%
69	FCFSFirstCash Holdings, Inc	21,400	$2.0M	0.31%
70	SPUSDSP Plus Corporation	86,800	$2.0M	0.31%
71	HFWAHeritage Financial Corporation	95,896	$2.0M	0.31%
72	KWRQuaker Chemical Corporation	14,400	$2.0M	0.31%
73	VPGVishay Precision Group	53,400	$2.0M	0.31%
74	OXMOxford Inds, Inc.	24,600	$2.0M	0.31%
75	FCFranklin Covey Co.	68,200	$2.0M	0.31%
76	ESTEEUREarthstone Energy Inc.	191,900	$2.0M	0.31%
77	DXLGDestination XL Group, Inc.	410,617	$2.0M	0.31%
78	ALITAlight, Inc.	241,756	$2.0M	0.31%
79	CRKComstock Res	202,624	$2.0M	0.31%
80	UNMUNUM Group	51,000	$2.0M	0.31%
81	ADTNAdtran, Inc.	131,300	$2.0M	0.31%
82	HEESEURH&E Equipment Services, Inc.	55,800	$2.0M	0.31%
83	ACHCAcadia Healthcare Co., Inc.	34,800	$2.0M	0.31%
84	HLITHarmonic, Inc.	152,500	$2.0M	0.31%
85	LYTSLSI Industries Inc.	180,700	$2.0M	0.31%
86	JBIJanus International Group, Inc	212,000	$2.0M	0.31%
87	INSWInternational Seaways, Inc.	51,400	$2.0M	0.31%
88	PFBCPreferred Bank	51,500	$2.0M	0.31%
89	PLABPhotronics, Inc.	169,300	$2.0M	0.31%
90	HAYNUSDHaynes Intl, Inc.	50,900	$2.0M	0.31%
91	—Avid Technology, Inc.	65,000	$2.0M	0.31%
92	IMXIInternational Money Express, I	91,800	$2.0M	0.31%
93	MODModine Mfg Co Com	95,800	$2.0M	0.31%
94	ACMRACM Research, Inc. Class A	215,600	$2.0M	0.31%
95	PDCEUSDPDC Energy, Inc.	39,960	$2.0M	0.31%
96	HXLHexcel Corporation	34,600	$2.0M	0.31%
97	CPRXCatalyst Pharmaceuticals, Inc.	147,400	$2.0M	0.31%
98	BLBDBlue Bird Corporation	127,300	$2.0M	0.31%
99	KTBKontoor Brands, Inc.	46,300	$2.0M	0.31%
100	SCSCScansource, Inc.	72,900	$2.0M	0.31%

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