Oberweis Asset Management 13FHR Quarterly holdings report by institutional manager | SEC 15 May 20

The Securities and Exchange Commission has not necessarily reviewed the information in this filing and has not determined if it is accurate and complete.
The reader should not assume that the information is accurate and complete.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM 13F

FORM 13F INFORMATION TABLE

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COLUMN 1	COLUMN 2	COLUMN 3	COLUMN 4	COLUMN 5			COLUMN 6	COLUMN 7	COLUMN 8
			VALUE	SHRS OR	SH/	PUT/	INVESTMENT	OTHER	VOTING AUTHORITY
NAME OF ISSUER	TITLE OF CLASS	CUSIP	(x$1000)	PRN AMT	PRN	CALL	DISCRETION	MANAGER	SOLE	SHARED	NONE
21Vianet Group, Inc. - ADR	com	90138A103	832	60,000	SH		SOLE		60,000	0	0
ACM Research, Inc. Class A	com	00108J109	740	25,000	SH		SOLE		25,000	0	0
AMR Corp Escrow	com	001esc102	0	18,000	SH		SOLE		18,000	0	0
Accuray Inc.	com	004397105	405	213,300	SH		SOLE		213,300	0	0
Addus Homecare Corp.	com	006739106	2,297	33,980	SH		SOLE		30,030	0	3,950
Adesto Technologies Corp.	com	00687D101	763	68,200	SH		SOLE		68,200	0	0
Adtran, Inc.	com	00738A106	174	22,700	SH		SOLE		22,700	0	0
Advansix, Inc.	com	00773T101	130	13,600	SH		SOLE		13,600	0	0
Agco Corp	com	001084102	404	8,555	SH		SOLE		8,555	0	0
Air Transport Services Group,	com	00922R105	860	47,030	SH		SOLE		47,030	0	0
Alibaba ADR	com	01609W102	7,002	36,005	SH		SOLE		34,130	0	1,875
Allied Motion Technologies	com	019330109	391	16,500	SH		SOLE		16,500	0	0
Allscripts Healthcare Solution	com	01988P108	189	26,800	SH		SOLE		26,800	0	0
Amedisys Inc.	com	023436108	1,155	6,295	SH		SOLE		3,240	0	3,055
Ameresco, Inc.	com	02361E108	692	40,608	SH		SOLE		40,608	0	0
American Eagle Outfitters	com	02553E106	157	19,800	SH		SOLE		19,800	0	0
American Power Corp	com	02906t107	0	10,000	SH		SOLE		0	0	10,000
Amgen, Inc.	com	031162100	307	1,512	SH		SOLE		0	0	1,512
Antares Pharma, Inc.	com	036642106	473	200,600	SH		SOLE		200,600	0	0
Apple, Inc.	com	037833100	629	2,473	SH		SOLE		60	0	2,413
Arco Platform Ltd. Com Cl A	com	G04553106	537	12,700	SH		SOLE		12,700	0	0
Associated Banc-Corp	com	045487105	440	34,440	SH		SOLE		34,440	0	0
Audio Codes ADR	com	m15342104	28,057	1,174,438	SH		SOLE		898,838	0	275,600
Avatar Ventures	com	05350B100	0	10,000	SH		SOLE		0	0	10,000
Axcelis Technologies	com	054540208	2,137	116,730	SH		SOLE		101,500	0	15,230
Bandwidth, Inc.	com	05988J103	3,893	57,849	SH		SOLE		44,969	0	12,880
Baudax Bio, Inc.	com	07160F107	227	91,620	SH		SOLE		91,620	0	0
Benchmark Electronics Inc	com	08160H101	229	11,440	SH		SOLE		11,440	0	0
BioDelivery Sciences Internati	com	09060J106	507	133,900	SH		SOLE		133,900	0	0
Boot Barn Hldgs, Inc.	com	099406100	393	30,400	SH		SOLE		30,400	0	0
Bottomline Technologies	com	101388106	2,015	54,980	SH		SOLE		42,270	0	12,710
CACI International, Inc.	com	127190304	2,833	13,415	SH		SOLE		9,850	0	3,565
CNO Financial Group, Inc.	com	12621E103	484	39,030	SH		SOLE		39,030	0	0
CRA Int'l Inc.	com	12618T105	628	18,800	SH		SOLE		18,800	0	0
Cabot Microelectronics Corp.	com	12709P103	1,097	9,612	SH		SOLE		5,845	0	3,767
Cadence Bancorporation	com	12739A100	117	17,800	SH		SOLE		17,800	0	0
Camtek, Ltd.	com	m20791105	786	93,400	SH		SOLE		93,400	0	0
Cardtronics, Inc.	com	G1991C105	619	29,600	SH		SOLE		29,600	0	0
Carpenter Technology Corp.	com	144285103	359	18,400	SH		SOLE		18,400	0	0
Castle Biosciences, Inc.	com	14843C105	2,618	87,810	SH		SOLE		67,700	0	20,110
Centerstate Bank Corp.	com	15201P109	370	21,468	SH		SOLE		13,500	0	7,968
Central Pacific Financial Corp	com	154760409	596	37,500	SH		SOLE		37,500	0	0
Ceva Inc.	com	157210105	673	27,000	SH		SOLE		27,000	0	0
ChannelAdvisor Corporation	com	159179100	581	80,000	SH		SOLE		80,000	0	0
Chart Industries Inc.	com	16115Q308	979	33,780	SH		SOLE		23,000	0	10,780
Clarus Corp.	com	18270P109	210	21,400	SH		SOLE		21,400	0	0
Cleveland-Cliffs Inc.	com	185899101	77	19,500	SH		SOLE		19,500	0	0
Coherus Biosciences, Inc.	com	19249H103	586	36,100	SH		SOLE		36,100	0	0
Collegium Pharmaceutical, Inc.	com	19459J104	885	54,200	SH		SOLE		54,200	0	0
Computer Programs & Systems	com	205306103	505	22,700	SH		SOLE		22,700	0	0
Comtech Telecommunications CP	com	205826209	348	26,200	SH		SOLE		26,200	0	0
Crocs, Inc.	com	227046109	788	46,400	SH		SOLE		46,400	0	0
CyberArk Software	com	M2682V108	496	5,800	SH		SOLE		5,800	0	0
Dana Inc.	com	235825205	383	48,980	SH		SOLE		48,980	0	0
Daqo New Energy Corp.	com	23703Q203	463	8,000	SH		SOLE		8,000	0	0
Deckers Outdoor Corp.	com	243537107	2,173	16,220	SH		SOLE		10,250	0	5,970
Digi International I	com	253798102	576	60,400	SH		SOLE		60,400	0	0
Digital Turbine, Inc.	com	25400W102	698	162,000	SH		SOLE		162,000	0	0
EPlus, Inc.	com	294268107	238	3,800	SH		SOLE		3,800	0	0
Ehealth, Inc.	com	28238P109	7,273	51,651	SH		SOLE		37,361	0	14,290
Endava Plc Ads	com	29260V105	19,018	540,900	SH		SOLE		414,000	0	126,900
Ensign Group, Inc.	com	29358p101	963	25,600	SH		SOLE		25,600	0	0
Entercom Communication	com	293639100	35	20,700	SH		SOLE		20,700	0	0
Enterprise Finl Svcs	com	293712105	796	28,520	SH		SOLE		23,550	0	4,970
EverQuote, Inc.	com	30041R108	585	22,300	SH		SOLE		22,300	0	0
Farmers National Banc Corp.	com	309627107	222	19,100	SH		SOLE		19,100	0	0
Faro Technologies, Inc.	com	311642102	872	19,600	SH		SOLE		19,600	0	0
Federal Signal Corp.	com	313855108	857	31,410	SH		SOLE		31,410	0	0
First Foundation Inc.	com	32026V104	269	26,300	SH		SOLE		26,300	0	0
Fitbit, Inc.	com	33812L102	161	24,100	SH		SOLE		24,100	0	0
Fulton Financial Corp.	com	360271100	461	40,100	SH		SOLE		40,100	0	0
GDS Holdings Ltd. ADR	com	36165L108	2,653	45,761	SH		SOLE		43,461	0	2,300
Granite Construction	com	387328107	408	26,900	SH		SOLE		26,900	0	0
Graphic Packaging Hldg., Co.	com	388689101	405	33,200	SH		SOLE		33,200	0	0
Gray Television, Inc.	com	389375106	493	45,930	SH		SOLE		18,110	0	27,820
Green Brick Partners, Inc.	com	392709101	206	25,533	SH		SOLE		25,533	0	0
Griffon Corp.	com	398433102	466	36,800	SH		SOLE		36,800	0	0
Gulfport Energy Corp.	com	402635304	38	85,900	SH		SOLE		85,900	0	0
Hancock Whitney Corp.	com	410120109	226	11,590	SH		SOLE		11,590	0	0
Harmonic, Inc.	com	413160102	464	80,600	SH		SOLE		80,600	0	0
Heritage Ins Hldgs, Inc.	com	42727J102	629	58,713	SH		SOLE		58,713	0	0
Hope Bancorp, Inc.	com	43940T109	435	52,900	SH		SOLE		52,900	0	0
Huron Consulting Group, Inc.	com	447462102	744	16,400	SH		SOLE		16,400	0	0
INPHI Corp.	com	45772F107	5,247	66,270	SH		SOLE		46,600	0	19,670
Imax Corp.	com	45245E109	103	11,400	SH		SOLE		11,400	0	0
Impinj, Inc.	com	453204109	351	21,000	SH		SOLE		21,000	0	0
Inmode Ltd.	com	M5425M103	1,304	60,670	SH		SOLE		45,680	0	14,990
Intel Corporation	com	458140100	329	6,082	SH		SOLE		0	0	6,082
Iridium Communications Inc.	com	46269C102	290	13,000	SH		SOLE		13,000	0	0
JD.com ADR	com	47215P106	1,833	45,250	SH		SOLE		45,000	0	250
JP Morgan Chase & Company Inc.	com	46625H100	404	4,486	SH		SOLE		140	0	4,346
Jabil Inc.	com	466313103	251	10,200	SH		SOLE		10,200	0	0
Johnson & Johnson	com	478160104	315	2,406	SH		SOLE		0	0	2,406
Limelight Networks, Inc.	com	53261M104	1,182	207,300	SH		SOLE		207,300	0	0
LiqTech International, Inc	com	53632A201	1,085	252,980	SH		SOLE		252,980	0	0
M/I Homes, Inc.	com	55305B101	392	23,700	SH		SOLE		23,700	0	0
MRC Global, Inc.	com	55345K103	88	20,700	SH		SOLE		20,700	0	0
MYR Group, Inc.	com	55405W104	492	18,800	SH		SOLE		18,800	0	0
Malibu Boats, Inc.	com	56117J100	1,683	58,460	SH		SOLE		45,150	0	13,310
Mastec, Inc.	com	576323109	960	29,340	SH		SOLE		29,340	0	0
MasterCraft Boat Holdings, Inc	com	57637H103	220	30,100	SH		SOLE		30,100	0	0
Mastercard, Inc.	com	57636Q104	421	1,743	SH		SOLE		0	0	1,743
Matson, Inc.	com	57686g105	231	7,545	SH		SOLE		7,145	0	400
McGrath RentCorp	com	580589109	801	15,300	SH		SOLE		15,300	0	0
Mercury Systems, Inc.	com	589378108	572	8,015	SH		SOLE		3,870	0	4,145
Meta Financial Group, Inc.	com	59100U108	673	31,000	SH		SOLE		31,000	0	0
Microsoft Corp.	com	594918104	574	3,640	SH		SOLE		0	0	3,640
Model N, Inc.	com	607525102	1,753	78,940	SH		SOLE		66,800	0	12,140
Monmouth Real Estate Invt Corp	com	609720107	158	13,100	SH		SOLE		13,100	0	0
Napco Sec Technologies, Inc.	com	630402105	753	49,637	SH		SOLE		49,637	0	0
National Health Investors, Inc	com	63633d104	344	6,940	SH		SOLE		6,940	0	0
National Healthcare	com	635906100	481	6,700	SH		SOLE		6,700	0	0
Navient Corp.	com	63938c108	149	19,600	SH		SOLE		19,600	0	0
Netease.Com, Inc. ADR	com	64110W102	928	2,890	SH		SOLE		2,500	0	390
New Jersey Res Corp.	com	646025106	507	14,930	SH		SOLE		14,930	0	0
New Oriental Education ADR	com	647581107	1,569	14,500	SH		SOLE		14,500	0	0
Newmont Mining	com	651639106	277	6,118	SH		SOLE		400	0	5,718
Northwest Pipe Co.	com	667746101	612	27,500	SH		SOLE		27,500	0	0
Old National Bancorp	com	680033107	654	49,615	SH		SOLE		49,615	0	0
OneSpan, Inc.	com	68287N100	1,332	73,400	SH		SOLE		70,700	0	2,700
Oshkosh Corp.	com	688239201	511	7,940	SH		SOLE		7,940	0	0
Oxford Immunotec Global Plc	com	G6855A103	438	47,300	SH		SOLE		47,300	0	0
PBF Energy Inc., Cl A	com	69318g106	85	11,960	SH		SOLE		11,600	0	360
Perdoceo Education Corp.	com	71363P106	3,147	291,659	SH		SOLE		229,239	0	62,420
Perficient Inc.	com	71375U101	610	22,500	SH		SOLE		22,500	0	0
Pfenex, Inc.	com	717071104	399	45,200	SH		SOLE		45,200	0	0
Physicians Realty Trust	com	71943u104	493	35,331	SH		SOLE		35,331	0	0
Plexus Corp.	com	729132100	273	5,000	SH		SOLE		5,000	0	0
Polyone Corp.	com	73179P106	203	10,700	SH		SOLE		10,700	0	0
Portland General Electric Co.	com	736508847	467	9,750	SH		SOLE		9,750	0	0
Quanex Building Products Corp.	com	747619104	103	10,200	SH		SOLE		10,200	0	0
Radian Group, Inc.	com	750236101	440	33,960	SH		SOLE		33,960	0	0
Rapid7, Inc.	com	753422104	1,290	29,780	SH		SOLE		17,400	0	12,380
Recro Pharma, Inc.	com	75629F109	976	119,500	SH		SOLE		119,500	0	0
Red Rock Resorts Inc	com	75700L108	95	11,070	SH		SOLE		11,070	0	0
Resmed Inc.	com	761152107	243	1,650	SH		SOLE		0	0	1,650
Rubicon Project Inc	com	78112V102	1,845	332,500	SH		SOLE		243,550	0	88,950
Ryman Hospitality Pptys. Inc.	com	78377t107	550	15,350	SH		SOLE		15,350	0	0
Science Applications Int'l. Co	com	808625107	511	6,850	SH		SOLE		6,850	0	0
Sea Ltd	com	81141R100	359	8,100	SH		SOLE		8,100	0	0
Simmons First National Corp.	com	828730200	597	32,430	SH		SOLE		32,430	0	0
Skyline Champion Corp	com	830830105	497	31,720	SH		SOLE		27,270	0	4,450
Skywest Inc	com	830879102	367	14,000	SH		SOLE		11,200	0	2,800
Southwest Gas Corp.	com	844895102	489	7,030	SH		SOLE		7,030	0	0
Spartan Motors, Inc.	com	846819100	745	57,700	SH		SOLE		57,700	0	0
Stifel Financial Corp.	com	860630102	573	13,870	SH		SOLE		13,870	0	0
Tactile Sys Technology, Inc.	com	87357P100	1,197	29,800	SH		SOLE		29,800	0	0
Tal Education Group ADR	com	874080104	1,917	36,000	SH		SOLE		36,000	0	0
Tandem Diabetes Care, Inc.	com	875372203	4,352	67,630	SH		SOLE		47,420	0	20,210
Telaria, Inc.	com	879181105	1,001	166,800	SH		SOLE		166,800	0	0
Tennant Company	com	880345103	510	8,800	SH		SOLE		8,800	0	0
The Travelers Co., Inc.	com	89417E109	248	2,498	SH		SOLE		0	0	2,498
Timken Company	com	887389104	242	7,490	SH		SOLE		7,490	0	0
Tital Oil & Gas, Inc.	com	888309101	0	10,000	SH		SOLE		0	0	10,000
Trex Company, Inc.	com	89531P105	2,357	29,405	SH		SOLE		19,370	0	10,035
Triumph Bancorp, Inc.	com	89679E300	601	23,100	SH		SOLE		23,100	0	0
Triumph Group, Inc.	com	896818101	292	43,240	SH		SOLE		43,240	0	0
Ultra Clean Holdings	com	90385V107	777	56,300	SH		SOLE		56,300	0	0
Upland Software, Inc.	com	91544A109	993	37,035	SH		SOLE		28,130	0	8,905
Vericel Corp.	com	92346J108	231	25,170	SH		SOLE		3,130	0	22,040
Viavi Solutions, Inc.	com	925550105	165	14,730	SH		SOLE		14,500	0	230
Vishay Intertechnology	com	928298108	475	32,950	SH		SOLE		32,950	0	0
W&T Offshore, Inc.	com	92922p106	259	152,100	SH		SOLE		152,100	0	0
Wal Mart Stores Inc.	com	931142103	206	1,814	SH		SOLE		0	0	1,814
Walker & Dunlop, Inc.	com	93148P102	310	7,686	SH		SOLE		7,686	0	0
Werner Enterprises, Inc.	com	950755108	308	8,500	SH		SOLE		8,500	0	0
Williams-Sonoma, Inc.	com	969904101	651	15,310	SH		SOLE		15,030	0	280
Wolverine World Wide	com	978097103	419	27,582	SH		SOLE		27,582	0	0
Xenacare Hldgs, Inc.	com	98401A106	0	140,000	SH		SOLE		0	0	140,000
Zix Corp.	com	98974P100	713	165,370	SH		SOLE		165,370	0	0
Zumiez Inc.	com	989817101	537	31,000	SH		SOLE		31,000	0	0
SPDR S&P 500 ETF Trust	com	78462F103	982	3,809	SH		SOLE		0	0	3,809

Oberweis Asset Management 13F-HRQuarterly holdings report by institutional manager