Oberweis Asset Management 13FHR Quarterly holdings report by institutional manager | SEC 15 May 23

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	1,810,455	264,300	SH		SOLE		264,300	0	0
A10 Networks, Inc.	com	002121101	3,310,213	213,700	SH		SOLE		213,700	0	0
ABM Industries, Inc.	com	000957100	2,602,026	57,900	SH		SOLE		57,900	0	0
ACM Research, Inc. Class A	com	00108J109	2,522,520	215,600	SH		SOLE		215,600	0	0
ADMA Biologics, Inc.	com	000899104	3,871,045	1,169,500	SH		SOLE		1,169,500	0	0
AMR Corp Escrow	com	001ESC102	0	18,000	SH		SOLE		18,000	0	0
ATI, Inc.	com	01741R102	2,876,634	72,900	SH		SOLE		72,900	0	0
Acadia Healthcare Co., Inc.	com	00404A109	2,514,300	34,800	SH		SOLE		34,800	0	0
Adtran, Inc.	com	00486H105	2,082,418	131,300	SH		SOLE		131,300	0	0
Aehr Test Systems	com	00760J108	21,686,330	699,108	SH		SOLE		698,808	0	300
Alight, Inc.	com	01626W101	2,226,573	241,756	SH		SOLE		241,756	0	0
Allegro MicroSystems, Inc.	com	01749D105	5,926,765	123,500	SH		SOLE		123,500	0	0
Allied Motion Technologies	com	019330109	2,187,590	56,600	SH		SOLE		56,600	0	0
Allison Transmission Holdings,	com	01973R101	3,003,936	66,400	SH		SOLE		66,400	0	0
Alphatec Hldgs Inc.	com	02081G201	10,585,068	678,530	SH		SOLE		608,160	0	70,370
Alta Equipment Group, Inc.	com	02128L106	1,711,800	108,000	SH		SOLE		108,000	0	0
Alteryx, Inc. Com Cl A	com	02156B103	3,315,634	56,350	SH		SOLE		56,200	0	150
Amazon.com	com	023135106	206,580	2,000	SH		SOLE		0	0	2,000
American Power Corp	com	02906T107	0	10,000	SH		SOLE		0	0	10,000
Amgen, Inc.	com	031162100	334,035	1,382	SH		SOLE		0	0	1,382
Amphastar Pharmaceuticals, Inc	com	03209R103	6,682,500	178,200	SH		SOLE		178,200	0	0
Amtech Systems, Inc.	com	032332504	1,134,306	118,900	SH		SOLE		118,900	0	0
Amylyx Pharmaceuticals, Inc.	com	03237H101	1,769,349	60,305	SH		SOLE		60,305	0	0
Apple, Inc.	com	037833100	903,526	5,479	SH		SOLE		240	0	5,239
Applied Industrial	com	03820c105	2,672,044	18,800	SH		SOLE		18,800	0	0
Avatar Ventures	com	05350B100	0	10,000	SH		SOLE		0	0	10,000
Aviat Networks, Inc.	com	05366Y201	3,256,711	94,507	SH		SOLE		94,507	0	0
Avid Technology, Inc.	com	05367P100	2,078,700	65,000	SH		SOLE		65,000	0	0
Axcelis Technologies	com	054540208	36,242,534	271,989	SH		SOLE		239,909	0	32,080
Axonics, Inc.	com	05465P101	5,223,574	95,740	SH		SOLE		80,450	0	15,290
Bel Fuse, Inc.	com	077347300	4,565,970	121,500	SH		SOLE		121,500	0	0
Belden, Inc.	com	077454106	8,041,188	92,672	SH		SOLE		72,926	0	19,747
Blue Bird Corporation	com	095306106	2,600,739	127,300	SH		SOLE		127,300	0	0
Boot Barn Hldgs, Inc.	com	099406100	3,157,568	41,200	SH		SOLE		41,200	0	0
Brookline Bancorp, Inc.	com	11373M107	1,578,150	150,300	SH		SOLE		150,300	0	0
CECO Environmental Corp.	com	125141101	3,114,174	222,600	SH		SOLE		222,600	0	0
CVD Equipment Corp.	com	126601103	429,590	32,300	SH		SOLE		32,300	0	0
Cabot Corp.	com	127055101	4,625,297	60,351	SH		SOLE		49,537	0	10,814
Cadence Design System, Inc.	com	127387108	3,718,593	17,700	SH		SOLE		17,700	0	0
Caleres Inc.	com	129500104	1,245,888	57,600	SH		SOLE		57,600	0	0
Calix, Inc.	com	13100M509	3,274,349	61,100	SH		SOLE		61,100	0	0
Camtek, Ltd.	com	M20791105	3,336,228	117,680	SH		SOLE		117,680	0	0
Catalyst Pharmaceuticals, Inc.	com	14888U101	2,443,892	147,400	SH		SOLE		147,400	0	0
Ciena Corporation	com	171779309	6,213,379	118,305	SH		SOLE		99,390	0	18,915
Clean Harbors, Inc.	com	184496107	7,247,038	50,835	SH		SOLE		43,630	0	7,205
Clearwater Paper Corp	com	18538R103	1,888,230	56,500	SH		SOLE		56,500	0	0
Comstock Res	com	205768302	2,186,315	202,624	SH		SOLE		202,624	0	0
Constellium NV Cl A	com	F21107101	69,581,850	4,553,786	SH		SOLE		3,018,754	0	1,535,032
Controladora Vuela Comp de Avi	com	21240E105	231,384	18,600	SH		SOLE		18,600	0	0
Crocs, Inc.	com	227046109	13,320,454	105,350	SH		SOLE		83,150	0	22,200
Dada Nexus Limited	com	23344D108	2,970,531	350,712	SH		SOLE		349,312	0	1,400
Deckers Outdoor Corp.	com	243537107	12,713,274	28,280	SH		SOLE		21,980	0	6,300
Destination XL Group, Inc.	com	25065K104	2,262,500	410,617	SH		SOLE		410,617	0	0
Dynavax Technologies Corp.	com	268158201	1,735,389	176,900	SH		SOLE		176,900	0	0
EZCorp, Inc.	com	302301106	3,194,900	371,500	SH		SOLE		371,500	0	0
Earthstone Energy Inc.	com	27032D304	2,496,619	191,900	SH		SOLE		191,900	0	0
Eli Lilly & Company	com	532457108	209,109	609	SH		SOLE		0	0	609
Employers Holdings, Inc.	com	292218104	2,413,851	57,900	SH		SOLE		57,900	0	0
Everi Hldgs, Inc.	com	30034T103	5,167,295	301,300	SH		SOLE		301,300	0	0
Evolent Health, Inc.	com	30050B101	5,442,190	167,710	SH		SOLE		147,360	0	20,350
Extreme Networks, Inc.	com	30226D106	3,843,120	201,000	SH		SOLE		201,000	0	0
Fabrinet	com	G3323L100	4,767,620	40,145	SH		SOLE		32,360	0	7,785
Federal Signal Corp.	com	313855108	3,160,443	58,300	SH		SOLE		58,300	0	0
First Merchants Corporation	com	320817109	1,387,195	42,100	SH		SOLE		42,100	0	0
FirstCash Holdings, Inc	com	33768G107	2,040,918	21,400	SH		SOLE		21,400	0	0
Formfactor Inc.	com	346375108	3,232,775	101,500	SH		SOLE		101,500	0	0
Franklin Covey Co.	com	353469109	2,623,654	68,200	SH		SOLE		68,200	0	0
Franklin Electric	com	353514102	3,246,450	34,500	SH		SOLE		34,500	0	0
Full House Resorts, Inc.	com	359678109	1,613,324	223,143	SH		SOLE		223,143	0	0
Granite Construction	com	387328107	1,951,300	47,500	SH		SOLE		47,500	0	0
Grupo Aeroportuario del Centro	com	400501102	268,530	3,000	SH		SOLE		3,000	0	0
Guess, Inc	com	401617105	1,872,052	96,200	SH		SOLE		96,200	0	0
H&E Equipment Services, Inc.	com	404030108	2,468,034	55,800	SH		SOLE		55,800	0	0
Haemonetics Corp.	com	405024100	3,053,475	36,900	SH		SOLE		36,900	0	0
Halozyme Therapeutics, Inc.	com	40637H109	6,264,688	164,040	SH		SOLE		138,850	0	25,190
Harmonic, Inc.	com	413160102	2,224,975	152,500	SH		SOLE		152,500	0	0
Haynes Intl, Inc.	com	420877201	2,549,581	50,900	SH		SOLE		50,900	0	0
Heritage Financial Corporation	com	42722X106	2,052,174	95,896	SH		SOLE		95,896	0	0
Hexcel Corporation	com	428291108	2,361,450	34,600	SH		SOLE		34,600	0	0
ICF International, Inc.	com	44925C103	6,954,980	63,400	SH		SOLE		63,400	0	0
Impinj, Inc.	com	453204109	19,823,188	146,275	SH		SOLE		126,190	0	20,085
Inmode Ltd.	com	M5425M103	4,122,840	129,000	SH		SOLE		118,660	0	10,340
Insperity, Inc.	com	45778Q107	2,321,605	19,100	SH		SOLE		19,100	0	0
Inspire Medical Systems, Inc.	com	457730109	1,392,717	5,950	SH		SOLE		5,950	0	0
Inter Parfums	com	458334109	3,470,656	24,400	SH		SOLE		24,400	0	0
International Money Express, I	com	46005L101	2,366,604	91,800	SH		SOLE		91,800	0	0
International Seaways, Inc.	com	Y41053102	2,142,352	51,400	SH		SOLE		51,400	0	0
JP Morgan Chase & Company Inc.	com	46625H100	533,204	4,092	SH		SOLE		140	0	3,952
Janus International Group, Inc	com	47103N106	2,090,320	212,000	SH		SOLE		212,000	0	0
Johnson & Johnson	com	478160104	419,729	2,708	SH		SOLE		0	0	2,708
KE Holdings, Inc.	com	482497104	753,600	40,000	SH		SOLE		40,000	0	0
KVH Industries, Inc.	com	482738101	1,035,580	91,000	SH		SOLE		91,000	0	0
Kontoor Brands, Inc.	com	50050N103	2,240,457	46,300	SH		SOLE		46,300	0	0
LSI Industries Inc.	com	50216C108	2,517,151	180,700	SH		SOLE		180,700	0	0
Lantheus Hldgs Inc.	com	516544103	14,740,262	178,540	SH		SOLE		164,020	0	14,520
LeMaitre Vascular, Inc.	com	525558201	1,477,189	28,700	SH		SOLE		28,700	0	0
Liberty Energy, Inc.	com	53115L104	1,407,819	109,900	SH		SOLE		109,900	0	0
M/I Homes, Inc.	com	55305B101	1,526,778	24,200	SH		SOLE		24,200	0	0
MGP Ingredients, Inc.	com	55303J106	3,090,204	31,950	SH		SOLE		31,800	0	150
MINISO Group Holding Limited	com	66981J102	2,249,432	126,800	SH		SOLE		126,800	0	0
MP Materials Corp.	com	553368101	1,482,794	52,600	SH		SOLE		52,600	0	0
MRC Global, Inc.	com	55345K103	1,703,916	175,300	SH		SOLE		175,300	0	0
Macom Technology Solutions	com	55405Y100	3,124,044	44,100	SH		SOLE		44,100	0	0
Magnolia Oil & Gas Corp.	com	559663109	1,693,512	77,400	SH		SOLE		77,400	0	0
Mastercard, Inc.	com	57636Q104	350,688	965	SH		SOLE		0	0	965
Matador Resources Company	com	576485205	1,782,110	37,400	SH		SOLE		37,400	0	0
Maximus, Inc.	com	577933104	3,210,960	40,800	SH		SOLE		40,800	0	0
Maxlinear, Inc. Class A	com	57776J100	4,945,597	140,460	SH		SOLE		111,220	0	29,240
McDonald's Corporation	com	580135101	234,745	840	SH		SOLE		0	0	840
Mercantile Bank Corp.	com	587376104	1,835,833	60,034	SH		SOLE		39,400	0	20,634
Merit Medical System Inc	com	589889104	3,239,010	43,800	SH		SOLE		43,800	0	0
Microsoft Corp.	com	594918104	880,757	3,055	SH		SOLE		0	0	3,055
Model N, Inc.	com	607525102	4,894,653	146,240	SH		SOLE		121,410	0	24,830
Modine Mfg Co Com	com	607828100	2,208,190	95,800	SH		SOLE		95,800	0	0
Monarch Casino & Resort, Inc.	com	609027107	2,624,910	35,400	SH		SOLE		35,400	0	0
Murphy USA, Inc.	com	626755102	1,032,200	4,000	SH		SOLE		4,000	0	0
NOV, Inc.	com	62955J103	1,674,692	90,475	SH		SOLE		90,475	0	0
NerdWallet, Inc.	com	64082B102	3,716,546	229,700	SH		SOLE		229,700	0	0
New Relic, Inc.	com	64829B100	2,205,997	29,300	SH		SOLE		29,300	0	0
Newmont Mining	com	651639106	289,046	5,896	SH		SOLE		400	0	5,496
Nine Energy Service, Inc.	com	65441V101	1,252,112	225,200	SH		SOLE		225,200	0	0
Novanta, Inc.	com	67000B104	1,113,630	7,000	SH		SOLE		7,000	0	0
O-I Glass, Inc.	com	67098H104	2,725,200	120,000	SH		SOLE		120,000	0	0
OneSpan, Inc.	com	68287N100	6,322,750	361,300	SH		SOLE		361,300	0	0
Option Care Health Inc.	com	68404L201	3,094,398	97,400	SH		SOLE		97,400	0	0
Oxford Inds, Inc.	com	691497309	2,597,514	24,600	SH		SOLE		24,600	0	0
PDC Energy, Inc.	com	69327R101	2,564,634	39,960	SH		SOLE		26,460	0	13,500
Patterson-Uti Energy, Inc.	com	703481101	1,917,560	163,894	SH		SOLE		163,894	0	0
Pdf Solutions, Inc.	com	693282105	1,823,200	43,000	SH		SOLE		43,000	0	0
Perion Network, Ltd.	com	M78673114	15,324,189	387,170	SH		SOLE		358,740	0	28,430
Photronics, Inc.	com	719405102	2,806,994	169,300	SH		SOLE		169,300	0	0
Pinduoduo Inc.	com	722304102	1,897,500	25,000	SH		SOLE		25,000	0	0
Playa Hotels & Resorts N.V.	com	N70544106	3,678,720	383,200	SH		SOLE		383,200	0	0
Preferred Bank	com	740367404	2,822,715	51,500	SH		SOLE		51,500	0	0
Quaker Chemical Corporation	com	747316107	2,850,480	14,400	SH		SOLE		14,400	0	0
RF Industries Ltd.	com	749552105	277,640	63,100	SH		SOLE		63,100	0	0
RPC, Inc.	com	749660106	4,727,700	614,785	SH		SOLE		539,701	0	75,084
Resmed Inc.	com	761152107	317,536	1,450	SH		SOLE		0	0	1,450
Rocky Brands, Inc.	com	774515100	832,827	36,100	SH		SOLE		36,100	0	0
SP Plus Corporation	com	78469C103	2,976,372	86,800	SH		SOLE		86,800	0	0
Scansource, Inc.	com	806037107	2,219,076	72,900	SH		SOLE		72,900	0	0
SeaWorld Entertainment Inc.	com	81282v100	4,953,848	80,800	SH		SOLE		62,320	0	18,480
ShockWave Medical, Inc.	com	82489T104	1,485,286	6,850	SH		SOLE		6,850	0	0
SiTime Corporation	com	82982T106	3,100,614	21,800	SH		SOLE		21,800	0	0
Silicon Laboratories, Inc.	com	826919102	3,643,623	20,810	SH		SOLE		20,810	0	0
Sterling Construction Co., Inc	com	859241101	3,708,452	97,900	SH		SOLE		97,900	0	0
SunOpta, Inc.	com	8676EP108	3,240,160	420,800	SH		SOLE		420,800	0	0
Synaptics, Inc.	com	87157D109	4,474,899	40,260	SH		SOLE		34,040	0	6,220
Tactile Sys Technology, Inc.	com	87357P100	4,261,811	259,550	SH		SOLE		259,550	0	0
Tencent Music Entertainment	com	88034P109	1,283,400	155,000	SH		SOLE		155,000	0	0
Texas Roadhouse	com	882681109	1,437,198	13,300	SH		SOLE		13,300	0	0
The Chefs Warehouse, Inc.	com	163086101	3,527,580	103,600	SH		SOLE		103,600	0	0
The Travelers Co., Inc.	com	89417E109	382,054	2,229	SH		SOLE		0	0	2,229
Titan Machinery, Inc.	com	88830R101	1,830,045	60,100	SH		SOLE		60,100	0	0
Titan Oil & Gas, Inc.	com	888309101	0	10,000	SH		SOLE		0	0	10,000
Topgolf Callaway Brands Corp.	com	131193104	2,990,046	138,300	SH		SOLE		138,300	0	0
TransMedics Group, Inc.	com	89377M109	8,201,559	108,300	SH		SOLE		108,300	0	0
Treace Medical Concepts, Inc.	com	89455T109	3,886,817	154,300	SH		SOLE		154,300	0	0
UNUM Group	com	91529Y106	2,017,560	51,000	SH		SOLE		51,000	0	0
Ultra Clean Holdings	com	90385V107	4,400,332	132,700	SH		SOLE		132,700	0	0
Univar Solutions, Inc.	com	91336L107	1,807,548	51,600	SH		SOLE		51,600	0	0
V2X, Inc.	com	92242T101	3,090,216	77,800	SH		SOLE		77,800	0	0
VSE Corp.	com	918284100	1,728,650	38,500	SH		SOLE		38,500	0	0
Veracyte, Inc.	com	92337F107	4,731,614	212,180	SH		SOLE		186,620	0	25,560
Veritiv Corp.	com	923454102	9,120,599	67,490	SH		SOLE		67,490	0	0
Viad Corp.	com	92552R406	247,704	11,886	SH		SOLE		11,886	0	0
Vishay Precision Group	com	92835K103	2,229,984	53,400	SH		SOLE		53,400	0	0
Visteon Corp.	com	92839U206	6,179,102	39,400	SH		SOLE		39,400	0	0
Wal Mart Stores Inc.	com	931142103	233,932	1,587	SH		SOLE		0	0	1,587
Washington Federal, Inc.	com	938824109	1,752,984	58,200	SH		SOLE		58,200	0	0
Weatherford International PLC	com	G48833118	1,738,955	29,300	SH		SOLE		29,300	0	0
Xenacare Hldgs, Inc.	com	98401A106	0	140,000	SH		SOLE		0	0	140,000
Zeta Global Holdings Corp.	com	98956A105	2,310,039	213,300	SH		SOLE		213,300	0	0
SPDR S&P 500 ETF Trust	com	78462F103	1,468,357	3,587	SH		SOLE		0	0	3,587

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