Oberweis Asset Management 13FHR Quarterly holdings report by institutional manager | SEC 16 Feb 21

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	3,785	109,100	SH		SOLE		109,100	0	0
A10 Networks, Inc.	com	002121101	869	88,100	SH		SOLE		88,100	0	0
AMR Corp Escrow	com	001ESC102	0	18,000	SH		SOLE		18,000	0	0
ASGN, Inc.	com	00191U102	267	3,200	SH		SOLE		3,200	0	0
Acadia Healthcare Co., Inc.	com	00404A109	1,317	26,195	SH		SOLE		7,410	0	18,785
Accuray Inc.	com	004397105	349	83,800	SH		SOLE		83,800	0	0
Addus Homecare Corp.	com	006739106	2,646	22,600	SH		SOLE		18,110	0	4,490
Adtran, Inc.	com	00738A106	588	39,800	SH		SOLE		39,800	0	0
Air Transport Services Group,	com	00922R105	1,141	36,400	SH		SOLE		36,400	0	0
Alibaba Group Holding Ltd ADR	com	01609W102	468	2,010	SH		SOLE		130	0	1,880
Allied Motion Technologies	com	019330109	950	18,600	SH		SOLE		18,600	0	0
Alphatec Hldgs Inc.	com	02081G201	3,825	263,400	SH		SOLE		260,500	0	2,900
Amazon.com	com	023135106	326	100	SH		SOLE		0	0	100
Amedisys Inc.	com	023436108	837	2,852	SH		SOLE		2,852	0	0
Ameresco, Inc.	com	02361E108	1,923	36,808	SH		SOLE		36,808	0	0
American Power Corp	com	02906T107	0	10,000	SH		SOLE		0	0	10,000
Amgen, Inc.	com	031162100	344	1,494	SH		SOLE		0	0	1,494
Antares Pharma, Inc.	com	036642106	800	200,600	SH		SOLE		200,600	0	0
Apple, Inc.	com	037833100	1,060	7,991	SH		SOLE		240	0	7,751
Arco Platform Ltd. Com Cl A	com	G04553106	625	17,620	SH		SOLE		17,620	0	0
Arcosa, Inc.	com	039653100	253	4,600	SH		SOLE		4,600	0	0
Autohome, Inc. ADR	com	05278c107	897	9,000	SH		SOLE		9,000	0	0
Avatar Ventures	com	05350B100	0	10,000	SH		SOLE		0	0	10,000
Avid Bioservices, Inc.	com	05368M106	1,102	95,500	SH		SOLE		95,500	0	0
Axcelis Technologies	com	054540208	1,436	49,320	SH		SOLE		37,180	0	12,140
BHP Billiton Ltd. ADR	com	088606108	209	3,192	SH		SOLE		140	0	3,052
BJs Wholesale Club Holdings, I	com	05550J101	1,727	46,330	SH		SOLE		31,950	0	14,380
Bandwidth, Inc.	com	05988J103	4,479	29,150	SH		SOLE		20,130	0	9,020
Bilibili, Inc. Spon ADR	com	090040106	1,903	22,200	SH		SOLE		22,200	0	0
BioDelivery Sciences Internati	com	09060J106	372	88,600	SH		SOLE		88,600	0	0
Boot Barn Hldgs, Inc.	com	099406100	1,231	28,400	SH		SOLE		28,400	0	0
Builders Firstsource	com	12008R107	241	5,900	SH		SOLE		5,900	0	0
CACI International, Inc.	com	127190304	2,549	10,225	SH		SOLE		6,830	0	3,395
CRA Int'l Inc.	com	12618T105	942	18,500	SH		SOLE		18,500	0	0
Cadence Design System, Inc.	com	127387108	540	3,956	SH		SOLE		3,956	0	0
Camtek, Ltd.	com	M20791105	1,292	58,980	SH		SOLE		58,980	0	0
CareDx, Inc.	com	14167L103	8,929	123,240	SH		SOLE		105,550	0	17,690
Castle Biosciences, Inc.	com	14843C105	10,953	163,110	SH		SOLE		123,370	0	39,740
Ceva Inc.	com	157210105	755	16,600	SH		SOLE		16,600	0	0
ChannelAdvisor Corporation	com	159179100	5,031	314,810	SH		SOLE		267,280	0	47,530
Chegg, Inc.	com	163092109	307	3,400	SH		SOLE		3,400	0	0
Clean Harbors, Inc.	com	184496107	304	4,000	SH		SOLE		4,000	0	0
Clearfield, Inc.	com	18482P103	534	21,600	SH		SOLE		21,600	0	0
Cohu, Inc.	com	192576106	1,209	31,676	SH		SOLE		31,676	0	0
Collegium Pharmaceutical, Inc.	com	19459J104	921	46,000	SH		SOLE		46,000	0	0
Commercial Vehicle Group	com	202608105	848	98,000	SH		SOLE		98,000	0	0
Constellium NV Cl A	com	F21107101	89,267	6,380,797	SH		SOLE		4,670,539	0	1,710,258
Crocs, Inc.	com	227046109	1,961	31,300	SH		SOLE		31,300	0	0
Cross Country Healthcare, Inc.	com	227483104	566	63,800	SH		SOLE		63,800	0	0
Dada Nexus Limited	com	23344D108	726	19,900	SH		SOLE		19,900	0	0
Daseke, Inc.	com	23753F107	407	70,000	SH		SOLE		70,000	0	0
Deckers Outdoor Corp.	com	243537107	4,643	16,190	SH		SOLE		10,600	0	5,590
Digital Turbine, Inc.	com	25400W102	2,900	51,275	SH		SOLE		51,275	0	0
El Pollo Loco Hldgs, Inc.	com	268603107	688	38,000	SH		SOLE		38,000	0	0
EnPro Industries, Inc.	com	29355x107	1,239	16,400	SH		SOLE		16,400	0	0
Endava Plc Ads	com	29260V105	36,029	469,431	SH		SOLE		346,582	0	122,849
Ensign Group, Inc.	com	29358P101	1,035	14,200	SH		SOLE		14,200	0	0
Enterprise Finl Svcs	com	293712105	498	14,256	SH		SOLE		1,320	0	12,936
Farfetch Ltd.	com	30744W107	504	7,900	SH		SOLE		7,900	0	0
First Foundation Inc.	com	32026V104	656	32,800	SH		SOLE		32,800	0	0
Fiverr Intl Ltd.	com	M4R82T106	68,134	349,224	SH		SOLE		255,594	0	93,630
Flexsteel Inds, Inc.	com	339382103	1,049	30,000	SH		SOLE		30,000	0	0
Full House Resorts, Inc.	com	359678109	393	100,000	SH		SOLE		100,000	0	0
Geopark Ltd.	com	G38327105	162	12,500	SH		SOLE		12,500	0	0
Golden Nugget Online Gaming, I	com	38113L107	2,366	120,100	SH		SOLE		120,100	0	0
Green Dot Corp. Cl A	com	39304D102	268	4,800	SH		SOLE		4,800	0	0
Griffon Corp.	com	398433102	750	36,800	SH		SOLE		36,800	0	0
Heidrick & Struggles	com	422819102	793	27,000	SH		SOLE		27,000	0	0
Helix Energy Solutions Group,	com	42330p107	350	83,300	SH		SOLE		83,300	0	0
Hillenbrand, Inc.	com	431571108	275	6,900	SH		SOLE		6,900	0	0
II-VI Inc.	com	902104108	2,738	36,040	SH		SOLE		24,680	0	11,360
INPHI Corp.	com	45772F107	3,708	23,110	SH		SOLE		15,510	0	7,600
Inmode Ltd.	com	M5425M103	1,643	34,600	SH		SOLE		34,600	0	0
Inovalon Holdings, Inc.	com	45781D101	401	22,080	SH		SOLE		2,900	0	19,180
Intel Corporation	com	458140100	296	5,936	SH		SOLE		0	0	5,936
International Money Express, I	com	46005L101	745	48,000	SH		SOLE		48,000	0	0
JP Morgan Chase & Company Inc.	com	46625H100	569	4,477	SH		SOLE		140	0	4,337
Johnson & Johnson	com	478160104	391	2,484	SH		SOLE		0	0	2,484
LiqTech International, Inc	com	53632A201	1,350	168,729	SH		SOLE		168,729	0	0
M/I Homes, Inc.	com	55305B101	1,165	26,300	SH		SOLE		26,300	0	0
MYR Group, Inc.	com	55405W104	1,058	17,600	SH		SOLE		17,600	0	0
Magnachip Semiconductor Corp.	com	55933J203	1,153	85,300	SH		SOLE		85,300	0	0
Magnite, Inc.	com	55955D100	8,472	275,857	SH		SOLE		194,187	0	81,670
Malibu Boats, Inc.	com	56117J100	1,193	19,100	SH		SOLE		19,100	0	0
Masonite Intl Corp.	com	575385109	1,406	14,300	SH		SOLE		14,300	0	0
Mastercard, Inc.	com	57636Q104	480	1,344	SH		SOLE		0	0	1,344
Matson, Inc.	com	57686g105	291	5,100	SH		SOLE		4,700	0	400
Maxlinear, Inc. Class A	com	57776J100	290	7,600	SH		SOLE		7,600	0	0
McDonald's Corporation	com	580135101	230	1,072	SH		SOLE		0	0	1,072
Mercantile Bank Corp.	com	587376104	530	19,500	SH		SOLE		19,500	0	0
Mercury Systems, Inc.	com	589378108	422	4,790	SH		SOLE		710	0	4,080
Microsoft Corp.	com	594918104	649	2,920	SH		SOLE		0	0	2,920
Model N, Inc.	com	607525102	3,014	84,480	SH		SOLE		68,530	0	15,950
NIO Inc	com	62914V106	975	20,000	SH		SOLE		20,000	0	0
NOV, Inc.	com	62955J103	176	12,800	SH		SOLE		12,800	0	0
Natural Grocers By Vitamin C	com	63888U108	429	31,200	SH		SOLE		31,200	0	0
Newmont Mining	com	651639106	374	6,238	SH		SOLE		400	0	5,838
OOMA Inc.	com	683416101	855	59,400	SH		SOLE		59,400	0	0
Patterson-Uti Energy, Inc.	com	703481101	600	114,000	SH		SOLE		114,000	0	0
Perficient Inc.	com	71375U101	1,072	22,500	SH		SOLE		22,500	0	0
Pinduoduo Inc.	com	722304102	1,954	11,000	SH		SOLE		11,000	0	0
Preformed Line Prods Co.	com	740444104	479	7,000	SH		SOLE		7,000	0	0
RPC, Inc.	com	749660106	316	100,283	SH		SOLE		100,283	0	0
Rapid7, Inc.	com	753422104	2,485	27,560	SH		SOLE		15,150	0	12,410
Realogy Hldgs Corp.	com	75605Y106	165	12,600	SH		SOLE		12,600	0	0
Resmed Inc.	com	761152107	308	1,450	SH		SOLE		0	0	1,450
Ribbon Communications, Inc.	com	762544104	472	72,000	SH		SOLE		72,000	0	0
Sea Ltd	com	81141R100	2,143	10,764	SH		SOLE		10,764	0	0
Select Medical Hldgs. Corp	com	81619Q105	252	9,100	SH		SOLE		9,100	0	0
Shopify, Inc.	com	82509L107	567	501	SH		SOLE		501	0	0
Shutterstock, Inc.	com	825690100	4,103	57,230	SH		SOLE		38,073	0	19,157
Shyft Group, Inc.	com	825698103	1,890	66,600	SH		SOLE		66,600	0	0
Sonic Automotive 'a'	com	83545G102	1,084	28,100	SH		SOLE		28,100	0	0
Stewart Information Services	com	860372101	242	5,000	SH		SOLE		5,000	0	0
Synaptics, Inc.	com	87157D109	1,921	19,930	SH		SOLE		14,230	0	5,700
TTEC Hldgs, Inc.	com	89854H102	292	4,000	SH		SOLE		4,000	0	0
Tal Education Group ADR	com	874080104	2,145	30,000	SH		SOLE		30,000	0	0
Tandem Diabetes Care, Inc.	com	875372203	3,538	36,980	SH		SOLE		25,030	0	11,950
Tempur Sealy International, In	com	88023U101	1,193	44,190	SH		SOLE		44,190	0	0
The Joint Corp.	com	47973J102	525	20,000	SH		SOLE		20,000	0	0
The Travelers Co., Inc.	com	89417E109	349	2,488	SH		SOLE		0	0	2,488
Titan Oil & Gas, Inc.	com	888309101	0	10,000	SH		SOLE		0	0	10,000
Trex Company, Inc.	com	89531P105	1,774	21,190	SH		SOLE		12,180	0	9,010
Trinet Group, Inc.	com	896288107	226	2,800	SH		SOLE		2,800	0	0
Tupperware Corp.	com	899896104	4,722	145,780	SH		SOLE		118,560	0	27,220
Ultra Clean Holdings	com	90385V107	1,153	37,000	SH		SOLE		37,000	0	0
Unity Software, Inc.	com	91332U101	409	2,664	SH		SOLE		2,664	0	0
Upland Software, Inc.	com	91544A109	1,312	28,600	SH		SOLE		28,600	0	0
Upwork, Inc.	com	91688F104	13,844	401,050	SH		SOLE		322,080	0	78,970
VOXX International Corporation	com	91829F104	1,050	82,300	SH		SOLE		82,300	0	0
Verizon Communications	com	92343V104	201	3,421	SH		SOLE		0	0	3,421
Vishay Precision Group	com	92835K103	560	17,800	SH		SOLE		17,800	0	0
Vocera Communications, Inc.	com	92857F107	1,167	28,100	SH		SOLE		28,100	0	0
Vonage Hldgs Corp	com	92886T201	155	12,000	SH		SOLE		12,000	0	0
Wal Mart Stores Inc.	com	931142103	253	1,757	SH		SOLE		0	0	1,757
Xenacare Hldgs, Inc.	com	98401A106	0	140,000	SH		SOLE		0	0	140,000
Zumiez Inc.	com	989817101	1,482	40,300	SH		SOLE		40,300	0	0
SPDR S&P 500 ETF Trust	com	78462F103	1,641	4,390	SH		SOLE		0	0	4,390

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