OBERWEIS ASSET MANAGEMENT INC/

Est. AUM

$3.39B

13F long equity, this entity only

Positions

180

Period

Mar 2026 (Q1)

SEC EDGAR

View filings ↗

Mar 2026 (Q1)

#	Issuer	Class	Value	Shares	% Portfolio	Discretion
1	Applied Optoelectronics Inc.	COM	$198.8M	2349969	5.87%	SOLE
2	Lumentum Hldgs, Inc.	COM	$187.1M	266222	5.53%	SOLE
3	Credo Technology Group	COM	$95.9M	1021968	2.83%	SOLE
4	DigitalOcean Holdings, Inc.	COM	$79.6M	927505	2.35%	SOLE
5	SharkNinja, Inc.	COM	$63.5M	599970	1.88%	SOLE
6	Nova Ltd.	COM	$59.9M	137955	1.77%	SOLE
7	Dana Inc.	COM	$54.2M	1611500	1.60%	SOLE
8	BrightSpring Health Services	COM	$49.4M	1158970	1.46%	SOLE
9	Macom Technology Solutions	COM	$47.9M	215886	1.42%	SOLE
10	Rambus, Inc	COM	$45.3M	526316	1.34%	SOLE
11	Clean Harbors, Inc.	COM	$41.4M	144355	1.22%	SOLE
12	SiTime Corporation	COM	$41.2M	119281	1.22%	SOLE
13	Ultra Clean Holdings	COM	$39.8M	640476	1.18%	SOLE
14	Everus Construction Group	COM	$38.5M	326533	1.14%	SOLE
15	Frontdoor, Inc.	COM	$38.0M	717960	1.12%	SOLE
16	Carpenter Technology Corp.	COM	$37.2M	94433	1.10%	SOLE
17	Skywest Inc	COM	$36.0M	392499	1.06%	SOLE
18	Lattice Semiconductor Corporat	COM	$34.7M	374436	1.03%	SOLE
19	Globus Medical, Inc.-A	COM	$33.8M	392200	1.00%	SOLE
20	Camtek, Ltd.	COM	$33.8M	222780	1.00%	SOLE
21	Arcutis Biotherapeutics, Inc.	COM	$32.2M	1365941	0.95%	SOLE
22	Flowserve Corporation	COM	$32.0M	434681	0.94%	SOLE
23	Silicon Motion Techn ADR	COM	$31.7M	282550	0.94%	SOLE
24	Life Time Holdings, Inc.	COM	$31.3M	1160500	0.92%	SOLE
25	Rush Street Interactive, Inc.	COM	$31.2M	1434560	0.92%	SOLE
26	FirstCash Holdings, Inc	COM	$31.1M	165665	0.92%	SOLE
27	Fastly, Inc.	COM	$31.1M	1071022	0.92%	SOLE
28	Tutor Perini Corp.	COM	$30.4M	393900	0.90%	SOLE
29	Dutch Bros., Inc.	COM	$30.3M	598493	0.90%	SOLE
30	Solaris Energy Infrastructur	COM	$30.1M	531889	0.89%	SOLE
31	Merit Medical System Inc	COM	$29.2M	424209	0.86%	SOLE
32	Federal Signal Corp.	COM	$28.9M	267634	0.85%	SOLE
33	American Superconductor	COM	$28.8M	849900	0.85%	SOLE
34	Mercury Systems, Inc.	COM	$28.5M	391023	0.84%	SOLE
35	Arcosa, Inc.	COM	$28.4M	267700	0.84%	SOLE
36	Osi Systems, Inc.	COM	$28.3M	106593	0.84%	SOLE
37	Core Natural Resources, Inc.	COM	$28.3M	269800	0.83%	SOLE
38	Waystar Holding Corp.	COM	$28.1M	1167474	0.83%	SOLE
39	Encompass Health Corporation	COM	$28.0M	289485	0.83%	SOLE
40	Veracyte, Inc.	COM	$27.1M	839834	0.80%	SOLE
41	AAR Corp.	COM	$26.8M	245125	0.79%	SOLE
42	ICU Medical, Inc.	COM	$26.3M	203710	0.78%	SOLE
43	Littelfuse, Inc.	COM	$24.4M	71800	0.72%	SOLE
44	Primoris Services Corp.	COM	$23.8M	166100	0.70%	SOLE
45	Remitly Global, Inc.	COM	$22.8M	1454300	0.67%	SOLE
46	Genpact Ltd.	COM	$22.6M	606832	0.67%	SOLE
47	Assurant, Inc.	COM	$22.3M	102300	0.66%	SOLE
48	Blue Bird Corporation	COM	$22.1M	389238	0.65%	SOLE
49	Imax Corp.	COM	$21.9M	577139	0.65%	SOLE
50	Levi Strauss & Co.	COM	$21.6M	1167300	0.64%	SOLE

1–50 of 180

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Values in USD (reported in $thousands on 13F). Source: SEC EDGAR.