Oberweis Asset Management Inc/ Top Holdings and 13F Report (2026)

About Oberweis Asset Management Inc/

Investment Activity

Oberweis Asset Management Inc/ has $4.84 billion in total holdings as of June 30, 2026.
Oberweis Asset Management Inc/ owns shares of 176 different stocks, but just 81 companies or ETFs make up 80% of its holdings.
Approximately 19.05% of the portfolio was purchased this quarter.
About 13.23% of the portfolio was sold this quarter.
This quarter, Oberweis Asset Management Inc/ has purchased 180 new stocks and bought additional shares in 113 stocks.
Oberweis Asset Management Inc/ sold shares of 27 stocks and completely divested from 28 stocks this quarter.

Largest Holdings

Credo Technology Group: $275,601,745
Applied Optoelectronics: $265,373,376
DigitalOcean Holdings, Inc.: $146,038,685
Silicon Motion Technology: $105,448,946
Ultra Clean: $92,295,085

Largest New Holdings this Quarter

57776J100 - Maxlinear, Inc. Class A: $40,905,585 Holding
67000B104 - Novanta: $39,628,742 Holding
090168105 - Billiontoone, Inc.: $35,877,619 Holding
28618M106 - Element Solutions: $35,339,775 Holding
68989M202 - Ouster, Inc.: $34,124,041 Holding

Largest Purchases this Quarter

Powell Industries: 145,364 shares (about $41.63M)
Maxlinear, Inc. Class A: 319,500 shares (about $40.91M)
Novanta: 244,260 shares (about $39.63M)
Billiontoone, Inc.: 299,030 shares (about $35.88M)
Element Solutions: 740,100 shares (about $35.34M)

Largest Sales this Quarter

Lumentum: 194,037 shares (about $166.50M)
Applied Optoelectronics: 558,842 shares (about $82.80M)
Nova: 29,280 shares (about $15.90M)
Catalyst Pharmaceuticals: 486,900 shares (about $15.30M)
MACOM Technology Solutions: 36,530 shares (about $13.89M)

Sector Allocation Over Time

Selling

Neutral

Buying

Latest 13F Holdings and Changes Since Previous Quarterly Filing

Issuer Name	Holdings Value	Approximate Purchase/Sale	Change in Shares	Shares Held	% of Portfolio	Sector
CRDO Credo Technology Group	$275,601,745	$2,322,453 ▼	-0.8%	1,013,428	5.7%	Technology
AAOI Applied Optoelectronics	$265,373,376	$82,798,031 ▼	-23.8%	1,791,127	5.5%	Technology
DigitalOcean Holdings, Inc.	$146,038,685	$392,575 ▲	0.3%	930,005	3.0%	COM
SIMO Silicon Motion Technology	$105,448,946	$11,266,554 ▲	12.0%	316,350	2.2%	Technology
UCTT Ultra Clean	$92,295,085	$969,612 ▲	1.1%	647,276	1.9%	Technology
SN SharkNinja	$90,372,245	$985,187 ▼	-1.1%	593,500	1.9%	Consumer Discretionary
SITM SiTime	$89,095,166	$164,023 ▲	0.2%	119,501	1.8%	Technology
BrightSpring Health Services	$82,661,427	$1,834,859 ▲	2.3%	1,185,280	1.7%	COM
Hinge Health, Inc.	$71,004,508	$32,345,930 ▲	83.7%	855,476	1.5%	COM
RMBS Rambus	$69,956,104	$92,918 ▲	0.1%	527,016	1.4%	Technology
MTSI MACOM Technology Solutions	$68,221,642	$13,894,916 ▼	-16.9%	179,356	1.4%	Technology
LITE Lumentum	$61,939,061	$166,495,388 ▼	-72.9%	72,185	1.3%	Technology
LSCC Lattice Semiconductor	$59,932,175	$2,658,445 ▲	4.6%	391,816	1.2%	Technology
NVMI Nova	$59,004,005	$15,897,283 ▼	-21.2%	108,675	1.2%	Technology
CRS Carpenter Technology	$57,534,775	$715,538 ▼	-1.2%	93,273	1.2%	Industrials
FTDR Frontdoor	$55,791,865	$85,349 ▲	0.2%	719,060	1.2%	Consumer Discretionary
Everus Construction Group	$54,461,969	$273,818 ▲	0.5%	328,183	1.1%	COM
VCYT Veracyte	$51,549,318	$2,225,867 ▲	4.5%	877,734	1.1%	Healthcare
POWL Powell Industries	$51,407,634	$41,626,435 ▲	425.6%	179,521	1.1%	Industrials
LTH Life Time Group	$48,584,081	$1,189,261 ▲	2.5%	1,189,620	1.0%	Consumer Discretionary
RSI Rush Street Interactive	$48,414,638	$5,750,824 ▲	13.5%	1,627,930	1.0%	Consumer Discretionary
MRCY Mercury Systems	$48,041,805	$207,961 ▲	0.4%	392,723	1.0%	Industrials
BROS Dutch Bros	$47,114,038	$4,136,256 ▲	9.6%	656,093	1.0%	Consumer Discretionary
CLH Clean Harbors	$45,850,656	$2,724,600 ▲	6.3%	153,475	0.9%	Industrials
Solaris Energy Infrastructur	$45,426,174	$2,630,398 ▲	6.1%	564,581	0.9%	COM
DIOD Diodes	$45,280,800	$20,733,408 ▲	84.5%	413,750	0.9%	Technology
ACA Arcosa	$42,925,931	$4,031,798 ▲	10.4%	295,450	0.9%	Materials
BLBD Blue Bird	$41,836,008	$11,101,776 ▲	36.1%	529,838	0.9%	Industrials
CAMT Camtek	$41,331,346	$4,991,472 ▲	13.7%	253,380	0.9%	Technology
LIVN LivaNova	$41,127,335	$14,657,498 ▲	55.4%	500,150	0.8%	Healthcare
AMSC American Superconductor	$40,991,125	$5,711,776 ▲	16.2%	987,500	0.8%	Industrials
Maxlinear, Inc. Class A	$40,905,585	$40,905,585 ▲	New Holding	319,500	0.8%	COM
GMED Globus Medical	$40,461,021	$9,473,299 ▲	30.6%	512,100	0.8%	Healthcare
NOVT Novanta	$39,628,742	$39,628,742 ▲	New Holding	244,260	0.8%	Technology
SKYW SkyWest	$38,122,755	$864,171 ▼	-2.2%	383,799	0.8%	Industrials
VIAV Viavi Solutions	$37,894,400	$9,569,100 ▲	33.8%	793,600	0.8%	Technology
MOG.A Moog	$36,761,762	$17,727,108 ▲	93.1%	86,735	0.8%	Industrials
LFUS Littelfuse	$36,335,334	$3,642,640 ▲	11.1%	79,800	0.8%	Technology
ARQT Arcutis Biotherapeutics	$35,998,513	$183,540 ▲	0.5%	1,372,941	0.7%	Healthcare
FCFS FirstCash	$35,931,834	$95,181 ▲	0.3%	166,105	0.7%	Finance
Billiontoone, Inc.	$35,877,619	$35,877,619 ▲	New Holding	299,030	0.7%	COM
DAN Dana	$35,870,943	$7,977,972 ▼	-18.2%	1,318,300	0.7%	Consumer Discretionary
ESI Element Solutions	$35,339,775	$35,339,775 ▲	New Holding	740,100	0.7%	Materials
AIR AAR	$35,207,232	$171,516 ▲	0.5%	246,325	0.7%	Industrials
Remitly Global, Inc.	$35,192,664	$2,601,801 ▲	8.0%	1,570,400	0.7%	COM
ICUI ICU Medical	$34,751,530	$4,887,644 ▲	16.4%	237,050	0.7%	Healthcare
FSS Federal Signal	$34,574,603	$186,310 ▲	0.5%	269,084	0.7%	Industrials
Ouster, Inc.	$34,124,041	$34,124,041 ▲	New Holding	545,810	0.7%	COM
LEVI Levi Strauss & Co.	$33,721,623	$4,737,564 ▲	16.3%	1,358,100	0.7%	Consumer Discretionary
MMSI Merit Medical Systems	$32,826,180	$3,411,528 ▲	11.6%	473,409	0.7%	Healthcare
AIZ Assurant	$32,787,513	$5,316,894 ▲	19.4%	122,100	0.7%	Finance
Waystar Holding Corp.	$32,629,643	$8,661,402 ▲	36.1%	1,589,364	0.7%	COM
CECO CECO Environmental	$32,491,453	$20,238,649 ▲	165.2%	358,072	0.7%	Industrials
LQDA Liquidia	$32,402,272	$2,734,739 ▲	9.2%	406,400	0.7%	Healthcare
EHC Encompass Health	$32,030,840	$2,769,693 ▲	9.5%	316,886	0.7%	Healthcare
Indivior Plc	$31,970,084	$5,160,548 ▲	19.2%	779,188	0.7%	COM
CGNX Cognex	$30,982,724	$30,982,724 ▲	New Holding	427,820	0.6%	Technology
GVA Granite Construction	$30,523,667	$30,523,667 ▲	New Holding	193,090	0.6%	Industrials
PDFS PDF Solutions	$30,184,856	$30,184,856 ▲	New Holding	426,400	0.6%	Technology
NVST Envista	$29,532,606	$11,999,316 ▲	68.4%	1,120,782	0.6%	Healthcare
DAVE Dave	$29,398,096	$4,545,598 ▲	18.3%	78,902	0.6%	Finance
AMBA Ambarella	$29,365,393	$4,038,520 ▲	15.9%	342,254	0.6%	Technology
LASR nLight	$28,774,642	$3,501,886 ▲	13.9%	413,310	0.6%	Technology
MYRG MYR Group	$27,116,676	$27,116,676 ▲	New Holding	54,190	0.6%	Industrials
ADPT Adaptive Biotechnologies	$27,000,209	$9,691,110 ▲	56.0%	1,258,751	0.6%	Healthcare
DRS Leonardo DRS	$26,817,498	$7,637,333 ▲	39.8%	628,486	0.6%	Industrials
TPC Tutor Perini	$26,815,904	$5,865,979 ▼	-17.9%	323,200	0.6%	Industrials
KGS Kodiak Gas Services	$26,736,513	$26,736,513 ▲	New Holding	355,870	0.6%	Energy
Kiniksa Pharmaceuticals, Ltd.	$26,413,524	$6,036,880 ▲	29.6%	413,034	0.5%	COM
Chime Financial Inc.	$25,975,398	$4,767,744 ▲	22.5%	1,268,330	0.5%	COM
ALHC Alignment Healthcare	$25,943,376	$2,928,630 ▲	12.7%	1,089,600	0.5%	Healthcare
HALO Halozyme Therapeutics	$25,127,018	$7,913,097 ▲	46.0%	321,030	0.5%	Healthcare
IRTC iRhythm Technologies	$24,028,376	$5,471,700 ▲	29.5%	202,004	0.5%	Healthcare
Ameris Bancorp	$23,882,796	$99,286 ▲	0.4%	264,600	0.5%	COM
ZWS Zurn Elkay Water Solutions Cor	$23,670,930	$5,875,123 ▲	33.0%	468,453	0.5%	Industrials
OSIS OSI Systems	$23,432,174	$120,285 ▲	0.5%	107,143	0.5%	Technology
Omada Health, Inc.	$23,021,160	$23,021,160 ▲	New Holding	1,048,800	0.5%	COM
URBN Urban Outfitters	$22,405,365	$99,204 ▲	0.4%	316,192	0.5%	Consumer Discretionary
ANIP ANI Pharmaceuticals	$21,962,031	$3,635,698 ▲	19.8%	265,306	0.5%	Healthcare
EZPW EZCORP	$21,841,326	$262,732 ▼	-1.2%	631,800	0.5%	Finance
Core Natural Resources, Inc.	$21,699,023	$109,627 ▲	0.5%	271,170	0.4%	COM
DCO Ducommun	$21,076,898	$2,574,419 ▲	13.9%	113,800	0.4%	Industrials
SKWD Skyward Specialty Insurance Group	$20,953,485	$1,867,200 ▲	9.8%	359,100	0.4%	Finance
WLDN Willdan Group	$20,779,570	$20,779,570 ▲	New Holding	262,700	0.4%	Industrials
ATEN A10 Networks	$20,622,720	$1,782,072 ▲	9.5%	552,000	0.4%	Technology
HQY HealthEquity	$20,619,243	$5,568,228 ▲	37.0%	228,291	0.4%	Healthcare
SGHC Super Group (SGHC)	$20,609,550	$89,430 ▲	0.4%	1,521,000	0.4%	Consumer Discretionary
SPXC SPX Technologies	$20,547,943	$90,713 ▲	0.4%	83,811	0.4%	Industrials
FORM FormFactor	$20,363,887	$20,363,887 ▲	New Holding	127,330	0.4%	Technology
WTS Watts Water Technologies	$19,901,318	$19,901,318 ▲	New Holding	50,840	0.4%	Industrials
KAR OPENLANE	$19,819,119	$19,819,119 ▲	New Holding	480,580	0.4%	Industrials
QTWO Q2	$19,740,673	$759,018 ▲	4.0%	410,409	0.4%	Technology
BOX BOX	$19,719,220	$756,921 ▼	-3.7%	743,000	0.4%	Technology
VSEC VSE	$19,673,393	$11,902,565 ▲	153.2%	86,098	0.4%	Industrials
BHE Benchmark Electronics	$19,566,261	$355,212 ▼	-1.8%	198,300	0.4%	Technology
NYT New York Times	$19,387,959	$4,576,692 ▲	30.9%	277,050	0.4%	Communication Services
AEIS Advanced Energy Industries	$18,428,354	$89,489 ▲	0.5%	49,423	0.4%	Technology
ETON Eton Pharmaceuticals	$18,157,920	$2,255,260 ▲	14.2%	501,600	0.4%	Healthcare
AXGN AxoGen	$17,930,681	$2,115,502 ▲	13.4%	388,194	0.4%	Healthcare
FN Fabrinet	$17,072,056	$61,829 ▲	0.4%	30,373	0.4%	Technology

Showing largest 100 holdings. View all holdings.

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Oberweis Asset Management Inc/ Top Holdings and 13F Report (2026)

About Oberweis Asset Management Inc/

Investment Activity

Largest Holdings

Largest New Holdings this Quarter

Largest Purchases this Quarter

Largest Sales this Quarter

Sector Allocation Over Time

Latest 13F Holdings and Changes Since Previous Quarterly Filing

More Institutional Buying and Selling Information

Best-in-Class Portfolio Monitoring

Stock Ideas and Recommendations

Advanced Stock Screeners and Research Tools

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Oberweis Asset Management Inc/ Top Holdings and 13F Report (2026)

About Oberweis Asset Management Inc/

Investment Activity

Largest Holdings

Largest New Holdings this Quarter

Largest Purchases this Quarter

Largest Sales this Quarter

Sector Allocation Over Time

Map of 500 Largest Holdings ofOberweis Asset Management Inc/

Latest 13F Holdings and Changes Since Previous Quarterly Filing

More Institutional Buying and Selling Information

MarketBeat All Access Features

Best-in-Class Portfolio Monitoring

Stock Ideas and Recommendations

Advanced Stock Screeners and Research Tools