Filed: 2/14/2024ACC: 0001213900-24-014028
📋 What this filing means
OBERWEIS ASSET MANAGEMENT INC/ filed this quarterly 13F‑HR report disclosing 192 equity positions with a total reported market value of $1.07B. This filing provides a transparent view of the manager's long equity holdings as of the quarter end.
192
Positions
$1.07B
Total AUM (reported)
35.89M
Total Shares
Allocation by class
COM$1.07B100.0%
Portfolio Concentration
Top 3$97.70M9.1%
4–10$135.02M12.6%
11–25$153.25M14.3%
Rest$687.63M64.0%
Top 3 weight
9.1%
Top 10 weight
21.7%
Voting Authority Distribution
Total shares with voting rights: 35.89M
Sole
Full voting authority
34.44M
shares
% of voting shares96.0%
Shared
Joint voting authority
0.00
shares
% of voting shares0.0%
None
No voting authority
1.45M
shares
% of voting shares4.0%
Investment Discretion (by position count)
Sole192
Shared0
Other0
Dominant voting typeSole · 96.0% of voting shares
Institutional Holdings192
Rows:
Constellium NV Cl A
SOLEShares1.85M
TypeSH
Market value$36.93M
3.44%
Sole
1.19M
Shared
0.00
None
660.23K
Axcelis Technologies
SOLEShares245.33K
TypeSH
Market value$31.82M
2.96%
Sole
217.04K
Shared
0.00
None
28.29K
Aehr Test Systems
SOLEShares1.09M
TypeSH
Market value$28.95M
2.70%
Sole
1.07M
Shared
0.00
None
19.09K
Alphatec Hldgs Inc.
SOLEShares1.61M
TypeSH
Market value$24.29M
2.26%
Sole
1.47M
Shared
0.00
None
142.50K
Weatherford International PLC
SOLEShares240.06K
TypeSH
Market value$23.49M
2.19%
Sole
219.86K
Shared
0.00
None
20.20K
Amphastar Pharmaceuticals, Inc
SOLEShares340.26K
TypeSH
Market value$21.05M
1.96%
Sole
322.52K
Shared
0.00
None
17.75K
Veracyte, Inc.
SOLEShares656.81K
TypeSH
Market value$18.07M
1.68%
Sole
623.74K
Shared
0.00
None
33.07K
Applied Optoelectronics Inc.
SOLEShares891.91K
TypeSH
Market value$17.23M
1.61%
Sole
891.91K
Shared
0.00
None
0.00
TransMedics Group, Inc.
SOLEShares212.90K
TypeSH
Market value$16.80M
1.57%
Sole
212.90K
Shared
0.00
None
0.00
Perion Network, Ltd.
SOLEShares456.29K
TypeSH
Market value$14.09M
1.31%
Sole
426.82K
Shared
0.00
None
29.47K
Universal Display Corp.
SOLEShares66.54K
TypeSH
Market value$12.73M
1.19%
Sole
60.52K
Shared
0.00
None
6.02K
ADMA Biologics, Inc.
SOLEShares2.71M
TypeSH
Market value$12.25M
1.14%
Sole
2.71M
Shared
0.00
None
0.00
Camtek, Ltd.
SOLEShares174.48K
TypeSH
Market value$12.11M
1.13%
Sole
174.48K
Shared
0.00
None
0.00
Vertiv Holdings Co.
SOLEShares233.67K
TypeSH
Market value$11.22M
1.05%
Sole
218K
Shared
0.00
None
15.67K
Axonics, Inc.
SOLEShares178.47K
TypeSH
Market value$11.11M
1.03%
Sole
159.45K
Shared
0.00
None
19.02K
Oshkosh Corp.
SOLEShares98.90K
TypeSH
Market value$10.72M
1.00%
Sole
90K
Shared
0.00
None
8.90K
Flowserve Corporation
SOLEShares245.27K
TypeSH
Market value$10.11M
0.94%
Sole
228.58K
Shared
0.00
None
16.69K
Clean Harbors, Inc.
SOLEShares57.05K
TypeSH
Market value$9.96M
0.93%
Sole
48.78K
Shared
0.00
None
8.28K
Encompass Health Corporation
SOLEShares145.25K
TypeSH
Market value$9.69M
0.90%
Sole
135.30K
Shared
0.00
None
9.95K
Frontdoor, Inc.
SOLEShares271.10K
TypeSH
Market value$9.55M
0.89%
Sole
268K
Shared
0.00
None
3.10K
Haemonetics Corp.
SOLEShares105.88K
TypeSH
Market value$9.05M
0.84%
Sole
97.81K
Shared
0.00
None
8.07K
ICF International, Inc.
SOLEShares66.10K
TypeSH
Market value$8.86M
0.83%
Sole
66.10K
Shared
0.00
None
0.00
Aerovironment, Inc.
SOLEShares69.80K
TypeSH
Market value$8.80M
0.82%
Sole
69.80K
Shared
0.00
None
0.00
CECO Environmental Corp.
SOLEShares426.70K
TypeSH
Market value$8.65M
0.81%
Sole
426.70K
Shared
0.00
None
0.00
Ultra Clean Holdings
SOLEShares247.10K
TypeSH
Market value$8.44M
0.79%
Sole
247.10K
Shared
0.00
None
0.00
| Issuer | Class | Shares | Type | Value / Portfolio % | Voting — Sole | Shared | None |
|---|---|---|---|---|---|---|---|
Constellium NV Cl ASOLE | com | 1.85M | SH | $36.93M 3.44% | 1.19M | 0.00 | 660.23K |
Axcelis TechnologiesSOLE | com | 245.33K | SH | $31.82M 2.96% | 217.04K | 0.00 | 28.29K |
Aehr Test SystemsSOLE | com | 1.09M | SH | $28.95M 2.70% | 1.07M | 0.00 | 19.09K |
Alphatec Hldgs Inc.SOLE | com | 1.61M | SH | $24.29M 2.26% | 1.47M | 0.00 | 142.50K |
Weatherford International PLCSOLE | com | 240.06K | SH | $23.49M 2.19% | 219.86K | 0.00 | 20.20K |
Amphastar Pharmaceuticals, IncSOLE | com | 340.26K | SH | $21.05M 1.96% | 322.52K | 0.00 | 17.75K |
Veracyte, Inc.SOLE | com | 656.81K | SH | $18.07M 1.68% | 623.74K | 0.00 | 33.07K |
Applied Optoelectronics Inc.SOLE | com | 891.91K | SH | $17.23M 1.61% | 891.91K | 0.00 | 0.00 |
TransMedics Group, Inc.SOLE | com | 212.90K | SH | $16.80M 1.57% | 212.90K | 0.00 | 0.00 |
Perion Network, Ltd.SOLE | com | 456.29K | SH | $14.09M 1.31% | 426.82K | 0.00 | 29.47K |
Universal Display Corp.SOLE | com | 66.54K | SH | $12.73M 1.19% | 60.52K | 0.00 | 6.02K |
ADMA Biologics, Inc.SOLE | com | 2.71M | SH | $12.25M 1.14% | 2.71M | 0.00 | 0.00 |
Camtek, Ltd.SOLE | com | 174.48K | SH | $12.11M 1.13% | 174.48K | 0.00 | 0.00 |
Vertiv Holdings Co.SOLE | com | 233.67K | SH | $11.22M 1.05% | 218K | 0.00 | 15.67K |
Axonics, Inc.SOLE | com | 178.47K | SH | $11.11M 1.03% | 159.45K | 0.00 | 19.02K |
Oshkosh Corp.SOLE | com | 98.90K | SH | $10.72M 1.00% | 90K | 0.00 | 8.90K |
Flowserve CorporationSOLE | com | 245.27K | SH | $10.11M 0.94% | 228.58K | 0.00 | 16.69K |
Clean Harbors, Inc.SOLE | com | 57.05K | SH | $9.96M 0.93% | 48.78K | 0.00 | 8.28K |
Encompass Health CorporationSOLE | com | 145.25K | SH | $9.69M 0.90% | 135.30K | 0.00 | 9.95K |
Frontdoor, Inc.SOLE | com | 271.10K | SH | $9.55M 0.89% | 268K | 0.00 | 3.10K |
Haemonetics Corp.SOLE | com | 105.88K | SH | $9.05M 0.84% | 97.81K | 0.00 | 8.07K |
ICF International, Inc.SOLE | com | 66.10K | SH | $8.86M 0.83% | 66.10K | 0.00 | 0.00 |
Aerovironment, Inc.SOLE | com | 69.80K | SH | $8.80M 0.82% | 69.80K | 0.00 | 0.00 |
CECO Environmental Corp.SOLE | com | 426.70K | SH | $8.65M 0.81% | 426.70K | 0.00 | 0.00 |
Ultra Clean HoldingsSOLE | com | 247.10K | SH | $8.44M 0.79% | 247.10K | 0.00 | 0.00 |
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