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

About Oberweis Asset Management Inc/

Investment Activity

Oberweis Asset Management Inc/ has $3.39 billion in total holdings as of March 31, 2026.
Oberweis Asset Management Inc/ owns shares of 180 different stocks, but just 84 companies or ETFs make up 80% of its holdings.
Approximately 20.64% of the portfolio was purchased this quarter.
About 8.73% of the portfolio was sold this quarter.
This quarter, Oberweis Asset Management Inc/ has purchased 179 new stocks and bought additional shares in 129 stocks.
Oberweis Asset Management Inc/ sold shares of 19 stocks and completely divested from 22 stocks this quarter.

Largest Holdings

Applied Optoelectronics: $198,783,878
Lumentum: $187,090,173
Credo Technology Group: $95,932,136
DigitalOcean Holdings, Inc.: $79,561,379
SharkNinja: $63,536,823

Largest New Holdings this Quarter

52661A108 - Leonardo DRS: $20,011,740 Holding
45579U109 - Indivior Plc: $19,916,028 Holding
16935C109 - Chime Financial Inc.: $19,395,477 Holding
433313103 - Hinge Health, Inc.: $17,959,937 Holding
29415F104 - Envista: $16,881,198 Holding

Largest Purchases this Quarter

Credo Technology Group: 346,580 shares (about $32.53M)
Dana: 815,000 shares (about $27.42M)
Applied Optoelectronics: 310,328 shares (about $26.25M)
Leonardo DRS: 449,500 shares (about $20.01M)
Indivior Plc: 653,413 shares (about $19.92M)

Largest Sales this Quarter

Ambarella: 322,675 shares (about $16.61M)
Freshworks: 1,996,720 shares (about $16.03M)
Lumentum: 14,708 shares (about $10.34M)
Powell Industries: 14,543 shares (about $7.87M)
New York Times: 91,050 shares (about $7.62M)

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
AAOI Applied Optoelectronics	$198,783,878	$26,250,646 â–²	15.2%	2,349,969	5.9%	Computer and Technology
LITE Lumentum	$187,090,173	$10,336,194 â–¼	-5.2%	266,222	5.5%	Computer and Technology
CRDO Credo Technology Group	$95,932,136	$32,533,465 â–²	51.3%	1,021,968	2.8%	Computer and Technology
DigitalOcean Holdings, Inc.	$79,561,379	$12,753,342 â–²	19.1%	927,505	2.3%	COM
SN SharkNinja	$63,536,823	$7,800,594 â–²	14.0%	599,970	1.9%	Retail/Wholesale
NVMI Nova	$59,911,097	$10,713,688 â–²	21.8%	137,955	1.8%	Computer and Technology
DAN Dana	$54,226,975	$27,424,750 â–²	102.3%	1,611,500	1.6%	Auto/Tires/Trucks
BrightSpring Health Services	$49,383,712	$10,693,832 â–²	27.6%	1,158,970	1.5%	COM
MTSI MACOM Technology Solutions	$47,941,804	$8,200,157 â–²	20.6%	215,886	1.4%	Computer and Technology
RMBS Rambus	$45,278,965	$5,524,502 â–²	13.9%	526,316	1.3%	Computer and Technology
CLH Clean Harbors	$41,390,909	$7,880,774 â–²	23.5%	144,355	1.2%	Business Services
SITM SiTime	$41,193,693	$4,449,835 â–²	12.1%	119,281	1.2%	Computer and Technology
UCTT Ultra Clean	$39,824,798	$744,668 â–²	1.9%	640,476	1.2%	Computer and Technology
Everus Construction Group	$38,550,486	$7,878,498 â–²	25.7%	326,533	1.1%	COM
FTDR Frontdoor	$37,951,366	$5,661,306 â–²	17.5%	717,960	1.1%	Construction
CRS Carpenter Technology	$37,220,897	$4,659,658 â–²	14.3%	94,433	1.1%	Basic Materials
SKYW SkyWest	$36,043,183	$943,921 â–²	2.7%	392,499	1.1%	Transportation
LSCC Lattice Semiconductor	$34,732,683	$5,547,048 â–²	19.0%	374,436	1.0%	Computer and Technology
GMED Globus Medical	$33,791,952	$10,528,752 â–²	45.3%	392,200	1.0%	Medical
CAMT Camtek	$33,775,676	$591,279 â–²	1.8%	222,780	1.0%	Computer and Technology
ARQT Arcutis Biotherapeutics	$32,181,570	$13,135,666 â–²	69.0%	1,365,941	1.0%	Medical
FLS Flowserve	$31,953,415	$1,818,638 â–²	6.0%	434,681	0.9%	Industrials
SIMO Silicon Motion Technology	$31,727,540	$5,193,413 â–²	19.6%	282,550	0.9%	Computer and Technology
LTH Life Time Group	$31,263,870	$2,726,328 â–²	9.6%	1,160,500	0.9%	Consumer Discretionary
RSI Rush Street Interactive	$31,201,680	$496,988 â–²	1.6%	1,434,560	0.9%	Consumer Discretionary
FCFS FirstCash	$31,145,020	$6,460,620 â–²	26.2%	165,665	0.9%	Business Services
FSLY Fastly	$31,123,899	$11,078,311 â–²	55.3%	1,071,022	0.9%	Computer and Technology
TPC Tutor Perini	$30,405,141	$517,173 â–²	1.7%	393,900	0.9%	Construction
BROS Dutch Bros	$30,319,655	$9,827,685 â–²	48.0%	598,493	0.9%	Retail/Wholesale
Solaris Energy Infrastructur	$30,057,047	$9,323,528 â–²	45.0%	531,889	0.9%	COM
MMSI Merit Medical Systems	$29,240,726	$10,715,099 â–²	57.8%	424,209	0.9%	Medical
FSS Federal Signal	$28,941,941	$10,936,631 â–²	60.7%	267,634	0.9%	Multi-Sector Conglomerates
AMSC American Superconductor	$28,769,115	$473,900 â–²	1.7%	849,900	0.8%	Computer and Technology
MRCY Mercury Systems	$28,509,487	$1,678,169 â–¼	-5.6%	391,023	0.8%	Aerospace
ACA Arcosa	$28,413,678	$4,893,054 â–²	20.8%	267,700	0.8%	Construction
OSIS OSI Systems	$28,301,507	$1,378,793 â–²	5.1%	106,593	0.8%	Computer and Technology
Core Natural Resources, Inc.	$28,256,154	$9,572,322 â–²	51.2%	269,800	0.8%	COM
Waystar Holding Corp.	$28,147,798	$7,880,932 â–²	38.9%	1,167,474	0.8%	COM
EHC Encompass Health	$28,001,892	$6,721,383 â–¼	-19.4%	289,485	0.8%	Medical
VCYT Veracyte	$27,051,053	$3,642,758 â–²	15.6%	839,834	0.8%	Medical
AIR AAR	$26,831,383	$3,018,360 â–¼	-10.1%	245,125	0.8%	Aerospace
ICUI ICU Medical	$26,309,147	$4,606,781 â–²	21.2%	203,710	0.8%	Medical
LFUS Littelfuse	$24,365,330	$3,223,825 â–²	15.2%	71,800	0.7%	Computer and Technology
Primoris Services Corp.	$23,758,944	$400,512 â–²	1.7%	166,100	0.7%	COM
Remitly Global, Inc.	$22,788,881	$7,075,005 â–²	45.0%	1,454,300	0.7%	COM
G Genpact	$22,604,496	$3,174,818 â–²	16.3%	606,832	0.7%	Computer and Technology
AIZ Assurant	$22,281,963	$4,203,733 â–²	23.3%	102,300	0.7%	Finance
BLBD Blue Bird	$22,104,826	$374,814 â–²	1.7%	389,238	0.7%	Auto/Tires/Trucks
IMAX IMAX	$21,937,053	$2,856,870 â–¼	-11.5%	577,139	0.6%	Consumer Discretionary
LEVI Levi Strauss & Co.	$21,583,377	$3,206,166 â–²	17.4%	1,167,300	0.6%	Retail/Wholesale
ATEC Alphatec	$20,762,228	$9,877,876 â–²	90.8%	1,908,293	0.6%	Medical
LASR nLight	$20,698,830	$376,902 â–²	1.9%	363,010	0.6%	Computer and Technology
EYE National Vision	$20,662,502	$343,952 â–²	1.7%	797,780	0.6%	Consumer Staples
ABCB Ameris Bancorp	$20,550,365	$8,352,729 â–²	68.5%	263,500	0.6%	Finance
LIVN LivaNova	$20,459,964	$6,966,176 â–²	51.6%	321,900	0.6%	Medical
DRS Leonardo DRS	$20,011,740	$20,011,740 â–²	New Holding	449,500	0.6%	Aerospace
URBN Urban Outfitters	$19,942,073	$1,798,633 â–²	9.9%	314,792	0.6%	Retail/Wholesale
Indivior Plc	$19,916,028	$19,916,028 â–²	New Holding	653,413	0.6%	COM
LOPE Grand Canyon Education	$19,876,507	$2,907,513 â–²	17.1%	116,900	0.6%	Consumer Discretionary
COMM CommScope	$19,874,618	$2,386,020 â–²	13.6%	1,092,012	0.6%	Computer and Technology
MTDR Matador Resources	$19,756,386	$3,714,984 â–²	23.2%	312,700	0.6%	Energy
VIAV Viavi Solutions	$19,741,696	$2,832,128 â–²	16.7%	593,200	0.6%	Computer and Technology
Chime Financial Inc.	$19,395,477	$19,395,477 â–²	New Holding	1,035,530	0.6%	COM
PEGA Pegasystems	$19,377,157	$1,295,953 â–²	7.2%	455,290	0.6%	Computer and Technology
CPRX Catalyst Pharmaceuticals	$19,326,913	$4,793,536 â–²	33.0%	780,570	0.6%	Medical
QTWO Q2	$18,665,952	$2,732,474 â–²	17.1%	394,629	0.6%	Computer and Technology
POWL Powell Industries	$18,481,670	$7,868,927 â–¼	-29.9%	34,157	0.5%	Industrials
IRTC iRhythm Technologies	$18,411,592	$4,284,598 â–²	30.3%	156,004	0.5%	Medical
BOX BOX	$18,238,733	$2,817,888 â–²	18.3%	771,520	0.5%	Computer and Technology
AGX Argan	$18,148,603	$191,170 â–²	1.1%	33,322	0.5%	Construction
Hinge Health, Inc.	$17,959,937	$17,959,937 â–²	New Holding	465,766	0.5%	COM
NYT New York Times	$17,721,455	$7,623,617 â–¼	-30.1%	211,650	0.5%	Consumer Staples
AEO American Eagle Outfitters	$17,449,830	$3,847,680 â–²	28.3%	1,044,900	0.5%	Retail/Wholesale
ALHC Alignment Healthcare	$17,031,492	$3,860,542 â–²	29.3%	966,600	0.5%	Medical
ANIP ANI Pharmaceuticals	$17,024,583	$2,503,556 â–²	17.2%	221,386	0.5%	Medical
NVST Envista	$16,881,198	$16,881,198 â–²	New Holding	665,400	0.5%	Medical
WGS GeneDx	$16,785,181	$4,020,172 â–²	31.5%	261,370	0.5%	Medical
SPXC SPX Technologies	$16,683,194	$1,307,808 â–²	8.5%	83,441	0.5%	Business Services
SHAK Shake Shack	$16,594,318	$16,594,318 â–²	New Holding	187,570	0.5%	Retail/Wholesale
CALX Calix	$16,413,120	$4,430,166 â–²	37.0%	335,030	0.5%	Computer and Technology
SGHC Super Group (SGHC)	$16,355,520	$2,655,720 â–²	19.4%	1,514,400	0.5%	Consumer Discretionary
EZPW EZCORP	$16,227,972	$291,870 â–²	1.8%	639,400	0.5%	Finance
LMAT LeMaitre Vascular	$16,222,819	$3,526,201 â–²	27.8%	148,601	0.5%	Medical
AEIS Advanced Energy Industries	$15,871,846	$3,060,259 â–²	23.9%	49,183	0.5%	Computer and Technology
ZWS Zurn Elkay Water Solutions Cor	$15,791,886	$3,864,446 â–²	32.4%	352,183	0.5%	Business Services
FN Fabrinet	$15,782,760	$2,640,456 â–²	20.1%	30,263	0.5%	Computer and Technology
Kiniksa Pharmaceuticals, Ltd.	$15,342,227	$280,907 â–²	1.9%	318,634	0.5%	COM
PAHC Phibro Animal Health	$15,326,401	$3,722,363 â–²	32.1%	277,100	0.5%	Medical
DIOD Diodes	$15,310,718	$4,942,024 â–²	47.7%	224,300	0.5%	Computer and Technology
AMBA Ambarella	$15,194,648	$16,609,696 â–¼	-52.2%	295,185	0.4%	Computer and Technology
MD Pediatrix Medical Group	$14,996,251	$3,018,129 â–²	25.2%	701,087	0.4%	Medical
MGY Magnolia Oil & Gas	$14,347,492	$2,467,701 â–²	20.8%	454,466	0.4%	Energy
SKWD Skyward Specialty Insurance Group	$14,287,728	$3,913,728 â–²	37.7%	327,100	0.4%	Finance
HALO Halozyme Therapeutics	$14,214,076	$6,614,881 â–²	87.0%	219,930	0.4%	Medical
LQDA Liquidia	$14,043,054	$1,619,046 â–²	13.0%	372,100	0.4%	Medical
ARLO Arlo Technologies	$13,978,129	$13,978,129 â–²	New Holding	982,300	0.4%	Computer and Technology
HQY HealthEquity	$13,926,188	$2,094,348 â–²	17.7%	166,641	0.4%	Medical
PUMP ProPetro	$13,912,855	$253,616 â–²	1.9%	965,500	0.4%	Energy
Zeta Global Holdings Corp.	$13,867,275	$1,656,317 â–²	13.6%	871,060	0.4%	COM
MIR Mirion Technologies	$13,835,924	$2,536,922 â–²	22.5%	744,267	0.4%	Business Services

Showing largest 100 holdings. View all holdings.

More Institutional Buying and Selling Information

SEC Filings and Trading Data

Get 30 Days of MarketBeat All Access for Free

Start Your 30-Day Trial

In-depth profiles and analysis for 20,000 public companies.
Real-time analyst ratings, insider transactions, earnings data, and more.
Our daily ratings and market update email newsletter.

Sign In
Create Account

Your Email Address:

Your Password:

Forgot your password?

Your Email Address:

Choose a Password:

By creating a free account, you agree to our terms of service. This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.

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

About MarketBeat

MarketBeat Products

Popular Tools

Financial Calendars

Terms & Info

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