Oberweis Asset Management 13FHR Quarterly holdings report by institutional manager | SEC 16 Aug 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
2U, Inc.	com	90214J101	342	8,200	SH		SOLE		8,200	0	0
360 DigiTech, Inc.	com	88557W101	1,255	30,000	SH		SOLE		30,000	0	0
AMR Corp Escrow	com	001ESC102	0	18,000	SH		SOLE		18,000	0	0
Absolute Software Corp.	com	00386B109	1,166	80,500	SH		SOLE		80,500	0	0
Acadia Healthcare Co., Inc.	com	00404A109	2,698	42,995	SH		SOLE		24,910	0	18,085
Accuray Inc.	com	004397105	683	151,000	SH		SOLE		151,000	0	0
Adient Plc	com	G0084W101	271	6,000	SH		SOLE		6,000	0	0
Adtran, Inc.	com	00738A106	822	39,800	SH		SOLE		39,800	0	0
Alibaba Group Holding Ltd ADR	com	01609W102	435	1,920	SH		SOLE		130	0	1,790
Allied Motion Technologies	com	019330109	963	27,900	SH		SOLE		27,900	0	0
Alpha & Omega Semiconductor	com	G6331P104	1,368	45,000	SH		SOLE		45,000	0	0
Alphabet, Inc. Cl C	com	02079k107	251	100	SH		SOLE		0	0	100
Alphatec Hldgs Inc.	com	02081G201	6,672	435,530	SH		SOLE		390,520	0	45,010
Amazon.com	com	023135106	344	100	SH		SOLE		0	0	100
Ameresco, Inc.	com	02361E108	2,566	40,908	SH		SOLE		40,908	0	0
American Power Corp	com	02906T107	0	10,000	SH		SOLE		0	0	10,000
Amgen, Inc.	com	031162100	365	1,496	SH		SOLE		0	0	1,496
Amphastar Pharmaceuticals, Inc	com	03209R103	214	10,600	SH		SOLE		10,600	0	0
Angiodynamics, Inc.	com	03475v101	2,667	98,300	SH		SOLE		98,300	0	0
Antares Pharma, Inc.	com	036642106	875	200,600	SH		SOLE		200,600	0	0
Apple, Inc.	com	037833100	1,004	7,334	SH		SOLE		240	0	7,094
Arconic Corporation	com	03966V107	1,297	36,400	SH		SOLE		11,780	0	24,620
Avatar Ventures	com	05350B100	0	10,000	SH		SOLE		0	0	10,000
Avaya Hldgs Corp.	com	05351X101	1,971	73,260	SH		SOLE		42,060	0	31,200
Aviat Networks, Inc.	com	05366Y201	2,936	89,607	SH		SOLE		89,607	0	0
Avid Bioservices, Inc.	com	05368M106	1,018	39,700	SH		SOLE		39,700	0	0
Avid Technology, Inc.	com	05367P100	223	5,700	SH		SOLE		5,700	0	0
Axcelis Technologies	com	054540208	5,177	128,080	SH		SOLE		105,880	0	22,200
BHP Billiton Ltd. ADR	com	088606108	222	3,043	SH		SOLE		140	0	2,903
BJs Wholesale Club Holdings, I	com	05550J101	1,059	22,250	SH		SOLE		6,310	0	15,940
Bank of New York Mellon Corp.	com	064058100	218	4,248	SH		SOLE		0	0	4,248
Beacon Roofing Supply	com	073685109	266	5,000	SH		SOLE		5,000	0	0
Belden, Inc.	com	077454106	273	5,400	SH		SOLE		5,400	0	0
Bilibili, Inc. Spon ADR	com	090040106	1,474	12,100	SH		SOLE		12,100	0	0
Boot Barn Hldgs, Inc.	com	099406100	2,690	32,000	SH		SOLE		32,000	0	0
Builders Firstsource	com	12008R107	1,980	46,420	SH		SOLE		29,210	0	17,210
CRA Int'l Inc.	com	12618T105	548	6,400	SH		SOLE		6,400	0	0
CTS Corp.	com	126501105	966	26,000	SH		SOLE		26,000	0	0
Cabot Corp.	com	127055101	273	4,800	SH		SOLE		4,800	0	0
Cadence Design System, Inc.	com	127387108	2,945	21,524	SH		SOLE		21,524	0	0
Camtek, Ltd.	com	M20791105	1,545	40,980	SH		SOLE		40,980	0	0
CareDx, Inc.	com	14167L103	4,286	46,830	SH		SOLE		31,470	0	15,360
Castle Biosciences, Inc.	com	14843C105	5,431	74,060	SH		SOLE		55,660	0	18,400
Central Garden & Pet Co.	com	153527106	201	3,800	SH		SOLE		3,800	0	0
ChannelAdvisor Corporation	com	159179100	10,252	418,280	SH		SOLE		326,960	0	91,320
Clean Harbors, Inc.	com	184496107	335	3,600	SH		SOLE		3,600	0	0
Clearfield, Inc.	com	18482P103	1,682	44,900	SH		SOLE		44,900	0	0
Cohu, Inc.	com	192576106	1,165	31,676	SH		SOLE		31,676	0	0
Commercial Vehicle Group	com	202608105	1,401	131,800	SH		SOLE		131,800	0	0
Commvault Systems, Inc.	com	204166102	305	3,900	SH		SOLE		3,900	0	0
Constellium NV Cl A	com	F21107101	124,920	6,592,097	SH		SOLE		4,917,339	0	1,674,758
Cornerstone Ondemand, Inc.	com	21925Y103	304	5,900	SH		SOLE		5,900	0	0
Crocs, Inc.	com	227046109	5,683	48,770	SH		SOLE		41,640	0	7,130
Cross Country Healthcare, Inc.	com	227483104	1,418	85,900	SH		SOLE		85,900	0	0
Cyberoptics Corp.	com	232517102	991	24,200	SH		SOLE		24,200	0	0
DZS, Inc.	com	268211109	1,359	65,500	SH		SOLE		65,500	0	0
Dada Nexus Limited	com	23344D108	287	9,900	SH		SOLE		9,900	0	0
Deckers Outdoor Corp.	com	243537107	7,355	19,150	SH		SOLE		13,680	0	5,470
Diebold, Inc.	com	253651103	1,339	104,300	SH		SOLE		104,300	0	0
El Pollo Loco Hldgs, Inc.	com	268603107	1,152	63,000	SH		SOLE		63,000	0	0
Employers Holdings, Inc.	com	292218104	942	22,000	SH		SOLE		22,000	0	0
EnPro Industries, Inc.	com	29355x107	1,205	12,400	SH		SOLE		12,400	0	0
Endava Plc Ads	com	29260V105	67,770	597,721	SH		SOLE		448,872	0	148,849
Entravision Communications	com	29382r107	2,214	331,400	SH		SOLE		331,400	0	0
Extreme Networks, Inc.	com	30226D106	1,185	106,200	SH		SOLE		106,200	0	0
Farfetch Ltd.	com	30744W107	1,294	25,700	SH		SOLE		25,700	0	0
First Foundation Inc.	com	32026V104	754	33,500	SH		SOLE		33,500	0	0
Flexsteel Inds, Inc.	com	339382103	1,212	30,000	SH		SOLE		30,000	0	0
Full House Resorts, Inc.	com	359678109	1,516	152,543	SH		SOLE		152,543	0	0
Futu Holdings Ltd.	com	36118L106	1,164	6,500	SH		SOLE		6,500	0	0
Golden Nugget Online Gaming, I	com	38113L107	1,535	120,300	SH		SOLE		120,300	0	0
Griffon Corp.	com	398433102	943	36,800	SH		SOLE		36,800	0	0
Guess, Inc	com	401617105	3,899	147,708	SH		SOLE		105,739	0	41,969
Hackett Group, Inc.	com	404609109	1,297	72,000	SH		SOLE		72,000	0	0
Halozyme Therapeutics, Inc.	com	40637H109	3,142	69,200	SH		SOLE		46,310	0	22,890
Headhunter Group Plc Spon ADR	com	42207L106	288	6,800	SH		SOLE		6,800	0	0
Healthstream Inc.	com	42222N103	911	32,600	SH		SOLE		32,600	0	0
Heidrick & Struggles	com	422819102	1,938	43,500	SH		SOLE		43,500	0	0
Helix Energy Solutions Group,	com	42330p107	476	83,300	SH		SOLE		83,300	0	0
Helmerich & Payne	com	423452101	750	22,982	SH		SOLE		9,160	0	13,822
Heska Corp Com Restrc New	com	42805E306	230	1,000	SH		SOLE		1,000	0	0
Hooker Furniture Corp	com	439038100	987	28,500	SH		SOLE		28,500	0	0
II-VI Inc.	com	902104108	5,739	79,060	SH		SOLE		59,730	0	19,330
Information Svcs Group, Inc.	com	45675Y104	1,375	235,000	SH		SOLE		235,000	0	0
Inmode Ltd.	com	M5425M103	6,690	70,660	SH		SOLE		59,260	0	11,400
Inotiv, Inc.	com	45783Q100	1,273	47,700	SH		SOLE		47,700	0	0
Intel Corporation	com	458140100	317	5,639	SH		SOLE		0	0	5,639
JP Morgan Chase & Company Inc.	com	46625H100	677	4,352	SH		SOLE		140	0	4,212
Johnson & Johnson	com	478160104	410	2,490	SH		SOLE		0	0	2,490
Johnson Outdoors, Inc.	com	479167108	1,125	9,300	SH		SOLE		9,300	0	0
KForce, Inc.	com	493732101	1,454	23,100	SH		SOLE		23,100	0	0
Karooooo Ltd.	com	Y4600W108	221	6,000	SH		SOLE		6,000	0	0
LI Auto, Inc. ADR	com	50202M102	1,922	55,000	SH		SOLE		55,000	0	0
LiqTech International, Inc	com	53632A201	1,235	168,729	SH		SOLE		168,729	0	0
Luna Innovations	com	550351100	921	85,000	SH		SOLE		85,000	0	0
M/I Homes, Inc.	com	55305B101	1,191	20,300	SH		SOLE		20,300	0	0
MYR Group, Inc.	com	55405W104	918	10,100	SH		SOLE		10,100	0	0
Macom Technology Solutions	com	55405Y100	250	3,900	SH		SOLE		3,900	0	0
Magnolia Oil & Gas Corp.	com	559663109	188	12,000	SH		SOLE		12,000	0	0
Malibu Boats, Inc.	com	56117J100	3,419	46,630	SH		SOLE		34,030	0	12,600
Masonite Intl Corp.	com	575385109	2,468	22,075	SH		SOLE		16,480	0	5,595
Mastercard, Inc.	com	57636Q104	491	1,344	SH		SOLE		0	0	1,344
Materion Corp.	com	576690101	249	3,300	SH		SOLE		3,300	0	0
Maxlinear, Inc. Class A	com	57776J100	1,506	35,450	SH		SOLE		11,350	0	24,100
McDonald's Corporation	com	580135101	249	1,079	SH		SOLE		0	0	1,079
Medifast, Inc.	com	58470H101	283	1,000	SH		SOLE		1,000	0	0
Mercantile Bank Corp.	com	587376104	1,089	36,074	SH		SOLE		21,500	0	14,574
Merit Medical System Inc	com	589889104	226	3,500	SH		SOLE		3,500	0	0
Microsoft Corp.	com	594918104	767	2,830	SH		SOLE		0	0	2,830
Model N, Inc.	com	607525102	3,198	93,310	SH		SOLE		70,110	0	23,200
Movado Group, Inc.	com	624580106	1,517	48,200	SH		SOLE		48,200	0	0
NOV, Inc.	com	62955J103	196	12,800	SH		SOLE		12,800	0	0
Natural Grocers By Vitamin C	com	63888U108	335	31,200	SH		SOLE		31,200	0	0
Neuronetics, Inc.	com	64131A105	1,258	78,500	SH		SOLE		78,500	0	0
Newmont Mining	com	651639106	392	6,183	SH		SOLE		400	0	5,783
OOMA Inc.	com	683416101	930	49,300	SH		SOLE		49,300	0	0
Option Care Health Inc.	com	68404L201	236	10,800	SH		SOLE		10,800	0	0
Organogenesis Hlgs, Inc.	com	68621F102	9,334	561,608	SH		SOLE		466,008	0	95,600
PDC Energy, Inc.	com	69327R101	201	4,400	SH		SOLE		4,400	0	0
PROG Holdings, Inc.	com	74319R101	217	4,500	SH		SOLE		4,500	0	0
Patrick Industries, Inc.	com	703343103	212	2,900	SH		SOLE		2,900	0	0
Patterson-Uti Energy, Inc.	com	703481101	1,133	114,000	SH		SOLE		114,000	0	0
Perficient Inc.	com	71375U101	1,809	22,500	SH		SOLE		22,500	0	0
Preformed Line Prods Co.	com	740444104	519	7,000	SH		SOLE		7,000	0	0
RPC, Inc.	com	749660106	938	189,400	SH		SOLE		189,400	0	0
Radnet, Inc.	com	750491102	2,405	71,400	SH		SOLE		71,400	0	0
Rapid7, Inc.	com	753422104	1,610	17,010	SH		SOLE		5,350	0	11,660
Realogy Hldgs Corp.	com	75605Y106	211	11,600	SH		SOLE		11,600	0	0
Red Robin Gourmet Burger	com	75689M101	2,622	79,200	SH		SOLE		79,200	0	0
Resmed Inc.	com	761152107	357	1,450	SH		SOLE		0	0	1,450
Sea Ltd	com	81141R100	15,615	56,863	SH		SOLE		56,863	0	0
Select Medical Hldgs. Corp	com	81619Q105	347	8,200	SH		SOLE		8,200	0	0
Shopify, Inc.	com	82509L107	4,850	3,320	SH		SOLE		3,320	0	0
Shutterstock, Inc.	com	825690100	7,489	76,282	SH		SOLE		50,999	0	25,283
Shyft Group, Inc.	com	825698103	1,025	27,400	SH		SOLE		27,400	0	0
Skyline Champion Corporation	com	830830105	298	5,600	SH		SOLE		5,600	0	0
Sterling Construction Co., Inc	com	859241101	1,486	61,600	SH		SOLE		61,600	0	0
Stewart Information Services	com	860372101	249	4,400	SH		SOLE		4,400	0	0
Strattec Security Corp.	com	863111100	716	16,100	SH		SOLE		16,100	0	0
Stride, Inc.	com	86333M108	254	7,900	SH		SOLE		7,900	0	0
Summit Materials, Inc.	com	86614U100	268	7,700	SH		SOLE		7,700	0	0
Superior Industries Intl. Inc.	com	868168105	1,315	152,498	SH		SOLE		152,498	0	0
Synaptics, Inc.	com	87157D109	8,644	55,560	SH		SOLE		44,840	0	10,720
TTEC Hldgs, Inc.	com	89854H102	278	2,700	SH		SOLE		2,700	0	0
Tempur Sealy International, In	com	88023U101	1,547	39,471	SH		SOLE		39,201	0	270
Teradata Corp	com	88076W103	330	6,600	SH		SOLE		6,600	0	0
The Travelers Co., Inc.	com	89417E109	355	2,373	SH		SOLE		0	0	2,373
Titan Machinery, Inc.	com	88830R101	897	29,000	SH		SOLE		29,000	0	0
Titan Oil & Gas, Inc.	com	888309101	0	10,000	SH		SOLE		0	0	10,000
Trex Company, Inc.	com	89531P105	1,844	18,040	SH		SOLE		9,780	0	8,260
TrueBlue, Inc.	com	89785X101	1,026	36,500	SH		SOLE		36,500	0	0
Tupperware Corp.	com	899896104	1,757	73,990	SH		SOLE		73,990	0	0
Ultra Clean Holdings	com	90385V107	4,651	86,580	SH		SOLE		85,970	0	610
Upwork, Inc.	com	91688F104	4,959	85,070	SH		SOLE		63,100	0	21,970
VOXX International Corporation	com	91829F104	1,177	84,000	SH		SOLE		84,000	0	0
Varex Imaging Corp.	com	92214X106	1,534	57,200	SH		SOLE		57,200	0	0
Veritiv Corp.	com	923454102	2,549	41,500	SH		SOLE		41,500	0	0
Vishay Precision Group	com	92835K103	1,117	32,800	SH		SOLE		32,800	0	0
Vocera Communications, Inc.	com	92857F107	1,611	40,426	SH		SOLE		40,426	0	0
Wal Mart Stores Inc.	com	931142103	241	1,710	SH		SOLE		0	0	1,710
Xenacare Hldgs, Inc.	com	98401A106	0	140,000	SH		SOLE		0	0	140,000
Zumiez Inc.	com	989817101	2,342	47,800	SH		SOLE		47,800	0	0
SPDR S&P 500 ETF Trust	com	78462F103	1,878	4,388	SH		SOLE		0	0	4,388

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