Filed: 8/14/2025ACC: 0001213900-25-076460
📋 What this filing means
OBERWEIS ASSET MANAGEMENT INC/ filed this quarterly 13F‑HR report disclosing 185 equity positions with a total reported market value of $2.30B. This filing provides a transparent view of the manager's long equity holdings as of the quarter end.
185
Positions
$2.30B
Total AUM (reported)
58.06M
Total Shares
Allocation by class
COM$2.30B99.9%
ETF$1.34M0.1%
Portfolio Concentration
Top 3$175.84M7.7%
4–10$276.09M12.0%
11–25$406.32M17.7%
Rest$1.44B62.7%
Top 3 weight
7.7%
Top 10 weight
19.7%
Voting Authority Distribution
Total shares with voting rights: 58.06M
Sole
Full voting authority
56.74M
shares
% of voting shares97.7%
Shared
Joint voting authority
0.00
shares
% of voting shares0.0%
None
No voting authority
1.32M
shares
% of voting shares2.3%
Investment Discretion (by position count)
Sole185
Shared0
Other0
Dominant voting typeSole · 97.7% of voting shares
Institutional Holdings185
Rows:
Credo Technology Group
SOLEShares758.57K
TypeSH
Market value$70.24M
3.06%
Sole
731.67K
Shared
0.00
None
26.90K
ADMA Biologics, Inc.
SOLEShares3.14M
TypeSH
Market value$57.10M
2.48%
Sole
3.08M
Shared
0.00
None
60.03K
Applied Optoelectronics Inc.
SOLEShares1.89M
TypeSH
Market value$48.50M
2.11%
Sole
1.89M
Shared
0.00
None
0.00
SharkNinja, Inc.
SOLEShares484.56K
TypeSH
Market value$47.97M
2.09%
Sole
469.51K
Shared
0.00
None
15.04K
Encompass Health Corporation
SOLEShares359.02K
TypeSH
Market value$44.03M
1.92%
Sole
347.70K
Shared
0.00
None
11.32K
Sportradar Group
SOLEShares1.38M
TypeSH
Market value$38.68M
1.68%
Sole
810.50K
Shared
0.00
None
566.90K
Ambarella, Inc.
SOLEShares573.36K
TypeSH
Market value$37.88M
1.65%
Sole
558.05K
Shared
0.00
None
15.30K
Itron Inc
SOLEShares284.50K
TypeSH
Market value$37.45M
1.63%
Sole
284.39K
Shared
0.00
None
110.00
Frontdoor, Inc.
SOLEShares610.86K
TypeSH
Market value$36.00M
1.57%
Sole
607.90K
Shared
0.00
None
2.96K
Skywest Inc
SOLEShares331K
TypeSH
Market value$34.08M
1.48%
Sole
323.92K
Shared
0.00
None
7.08K
Rambus, Inc
SOLEShares505.78K
TypeSH
Market value$32.38M
1.41%
Sole
492.52K
Shared
0.00
None
13.26K
Nova Ltd.
SOLEShares113.10K
TypeSH
Market value$31.13M
1.35%
Sole
113.10K
Shared
0.00
None
0.00
Freshworks, Inc.
SOLEShares2.05M
TypeSH
Market value$30.58M
1.33%
Sole
1.99M
Shared
0.00
None
65.50K
Waystar Holding Corp.
SOLEShares744.98K
TypeSH
Market value$30.45M
1.32%
Sole
723.99K
Shared
0.00
None
20.99K
Flowserve Corporation
SOLEShares522.17K
TypeSH
Market value$27.34M
1.19%
Sole
503.30K
Shared
0.00
None
18.87K
Q2 Holdings, Inc.
SOLEShares292.01K
TypeSH
Market value$27.33M
1.19%
Sole
281.36K
Shared
0.00
None
10.65K
Clean Harbors, Inc.
SOLEShares117.30K
TypeSH
Market value$27.12M
1.18%
Sole
110K
Shared
0.00
None
7.30K
Stride, Inc.
SOLEShares181.80K
TypeSH
Market value$26.40M
1.15%
Sole
181.80K
Shared
0.00
None
0.00
Macom Technology Solutions
SOLEShares179.52K
TypeSH
Market value$25.72M
1.12%
Sole
171.42K
Shared
0.00
None
8.10K
Lumentum Hldgs, Inc.
SOLEShares269.05K
TypeSH
Market value$25.58M
1.11%
Sole
259.58K
Shared
0.00
None
9.47K
Fabrinet
SOLEShares86.20K
TypeSH
Market value$25.40M
1.11%
Sole
86.20K
Shared
0.00
None
0.00
Life Time Holdings, Inc.
SOLEShares812.30K
TypeSH
Market value$24.64M
1.07%
Sole
812.30K
Shared
0.00
None
0.00
American Superconductor
SOLEShares668.20K
TypeSH
Market value$24.52M
1.07%
Sole
668.20K
Shared
0.00
None
0.00
Osi Systems, Inc.
SOLEShares109K
TypeSH
Market value$24.51M
1.07%
Sole
109K
Shared
0.00
None
0.00
Mr. Cooper Group Inc.
SOLEShares155.80K
TypeSH
Market value$23.25M
1.01%
Sole
155.80K
Shared
0.00
None
0.00
| Issuer | Class | Shares | Type | Value / Portfolio % | Voting — Sole | Shared | None |
|---|---|---|---|---|---|---|---|
Credo Technology GroupSOLE | COM | 758.57K | SH | $70.24M 3.06% | 731.67K | 0.00 | 26.90K |
ADMA Biologics, Inc.SOLE | COM | 3.14M | SH | $57.10M 2.48% | 3.08M | 0.00 | 60.03K |
Applied Optoelectronics Inc.SOLE | COM | 1.89M | SH | $48.50M 2.11% | 1.89M | 0.00 | 0.00 |
SharkNinja, Inc.SOLE | COM | 484.56K | SH | $47.97M 2.09% | 469.51K | 0.00 | 15.04K |
Encompass Health CorporationSOLE | COM | 359.02K | SH | $44.03M 1.92% | 347.70K | 0.00 | 11.32K |
Sportradar GroupSOLE | COM | 1.38M | SH | $38.68M 1.68% | 810.50K | 0.00 | 566.90K |
Ambarella, Inc.SOLE | COM | 573.36K | SH | $37.88M 1.65% | 558.05K | 0.00 | 15.30K |
Itron IncSOLE | COM | 284.50K | SH | $37.45M 1.63% | 284.39K | 0.00 | 110.00 |
Frontdoor, Inc.SOLE | COM | 610.86K | SH | $36.00M 1.57% | 607.90K | 0.00 | 2.96K |
Skywest IncSOLE | COM | 331K | SH | $34.08M 1.48% | 323.92K | 0.00 | 7.08K |
Rambus, IncSOLE | COM | 505.78K | SH | $32.38M 1.41% | 492.52K | 0.00 | 13.26K |
Nova Ltd.SOLE | COM | 113.10K | SH | $31.13M 1.35% | 113.10K | 0.00 | 0.00 |
Freshworks, Inc.SOLE | COM | 2.05M | SH | $30.58M 1.33% | 1.99M | 0.00 | 65.50K |
Waystar Holding Corp.SOLE | COM | 744.98K | SH | $30.45M 1.32% | 723.99K | 0.00 | 20.99K |
Flowserve CorporationSOLE | COM | 522.17K | SH | $27.34M 1.19% | 503.30K | 0.00 | 18.87K |
Q2 Holdings, Inc.SOLE | COM | 292.01K | SH | $27.33M 1.19% | 281.36K | 0.00 | 10.65K |
Clean Harbors, Inc.SOLE | COM | 117.30K | SH | $27.12M 1.18% | 110K | 0.00 | 7.30K |
Stride, Inc.SOLE | COM | 181.80K | SH | $26.40M 1.15% | 181.80K | 0.00 | 0.00 |
Macom Technology SolutionsSOLE | COM | 179.52K | SH | $25.72M 1.12% | 171.42K | 0.00 | 8.10K |
Lumentum Hldgs, Inc.SOLE | COM | 269.05K | SH | $25.58M 1.11% | 259.58K | 0.00 | 9.47K |
FabrinetSOLE | COM | 86.20K | SH | $25.40M 1.11% | 86.20K | 0.00 | 0.00 |
Life Time Holdings, Inc.SOLE | COM | 812.30K | SH | $24.64M 1.07% | 812.30K | 0.00 | 0.00 |
American SuperconductorSOLE | COM | 668.20K | SH | $24.52M 1.07% | 668.20K | 0.00 | 0.00 |
Osi Systems, Inc.SOLE | COM | 109K | SH | $24.51M 1.07% | 109K | 0.00 | 0.00 |
Mr. Cooper Group Inc.SOLE | COM | 155.80K | SH | $23.25M 1.01% | 155.80K | 0.00 | 0.00 |
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