OBERWEIS ASSET MANAGEMENT INC/ Portfolio Holdings
Q3 2025•181 long positions•$2.6B portfolio value
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Holding206 | Sector | Position↕ | Traded↕ | Ownership↕ | Shares Δ↕ | Shares Δ % | Market Cap↕ | Owned Since↕ |
|---|---|---|---|---|---|---|---|---|
Communication Equipment Technology | $93.8M 3.6% | -$16.7M Sold | 0.372% 643.9K shares | 758.6K → 643.9K −$16.7M | -15.11% | $25.2B Large Cap | Q1 2024 Held for 1y 8m | |
Communication Equipment Technology | $53.5M 2.05% | +$9.7M Bought | 0.47% 328.6K shares | 269.1K → 328.6K +$9.7M | +22.14% | $11.4B Large Cap | Q2 2025 Held for 5 months | |
Semiconductors Technology | $52.9M 2.03% | +$220.8K Bought | 0.472% 507.9K shares | 505.8K → 507.9K +$220.8K | +0.42% | $11.2B Large Cap | Q4 2024 Held for 11 months | |
Semiconductors Technology | $50.4M 1.94% | +$3.1M Bought | 1.43% 611.4K shares | 573.4K → 611.4K +$3.1M | +6.63% | $3.5B Mid Cap | Q3 2024 Held for 1y 2m | |
Furnishings, Fixtures & Appliances Consumer Cyclical | $49.8M 1.91% | -$180.5K Sold | 0.342% 482.8K shares | 484.6K → 482.8K −$180.5K | -0.36% | $14.6B Large Cap | Q1 2024 Held for 1y 8m | |
Semiconductors Technology | $49.0M 1.88% | — | 3.03% 1.9M shares | — | — | $1.6B Small Cap | Q3 2023 Held for 2y 2m | |
Medical - Care Facilities Healthcare | $45.6M 1.75% | -$28.6K Sold | 0.356% 358.8K shares | 359.0K → 358.8K −$28.6K | -0.06% | $12.8B Large Cap | Q2 2023 Held for 2y 5m | |
Personal Products & Services Consumer Cyclical | $41.1M 1.58% | — | 0.839% 610.9K shares | — | — | $4.9B Mid Cap | Q2 2023 Held for 2y 5m | |
Biotechnology Healthcare | $39.8M 1.53% | -$6.2M Sold | 1.14% 2.7M shares | 3.1M → 2.7M −$6.2M | -13.52% | $3.5B Mid Cap | Q4 2022 Held for 2y 11m | |
Industrial - Machinery Industrials | $39.5M 1.52% | -$148.5K Sold | 1.47% 665.7K shares | 668.2K → 665.7K −$148.5K | -0.37% | $2.7B Mid Cap | Q4 2023 Held for 1y 11m | |
Software - Application Technology | $37.1M 1.42% | +$45.7K Bought | 0.466% 1.4M shares | 1.4M → 1.4M +$45.7K | +0.12% | $8.0B Mid Cap | Q4 2024 Held for 11 months | |
Semiconductors Technology | $36.2M 1.39% | +$59.1K Bought | 0.382% 113.3K shares | 113.1K → 113.3K +$59.1K | +0.16% | $9.5B Mid Cap | Q3 2024 Held for 1y 2m | |
Hardware, Equipment & Parts Technology | $35.4M 1.36% | -$43.6K Sold | 0.622% 284.2K shares | 284.5K → 284.2K −$43.6K | -0.12% | $5.7B Mid Cap | Q1 2024 Held for 1y 8m | |
Airlines, Airports & Air Services Industrials | $33.3M 1.28% | -$21.1K Sold | 0.819% 330.8K shares | 331.0K → 330.8K −$21.1K | -0.06% | $4.1B Mid Cap | Q4 2023 Held for 1y 11m | |
Semiconductors Technology | $32.1M 1.23% | +$9.9M Bought | 0.409% 106.4K shares | 73.5K → 106.4K +$9.9M | +44.76% | $7.8B Mid Cap | Q2 2025 Held for 5 months | |
Information Technology Services Technology | $31.7M 1.22% | +$3.5M Bought | 0.48% 836.6K shares | 745.0K → 836.6K +$3.5M | +12.29% | $6.6B Mid Cap | Q4 2024 Held for 11 months | |
Aerospace & Defense Industrials | $30.8M 1.18% | — | 0.664% 398.5K shares | — | — | $4.6B Mid Cap | Q1 2025 Held for 8 months | |
Waste Management Industrials | $27.1M 1.04% | -$123.1K Sold | 0.218% 116.8K shares | 117.3K → 116.8K −$123.1K | -0.45% | $12.5B Large Cap | Q4 2020 Held for 4y 11m | |
Education & Training Services Consumer Defensive | $27.1M 1.04% | — | 0.417% 181.8K shares | — | — | $6.5B Mid Cap | Q4 2023 Held for 1y 11m | |
Medical - Healthcare Information Services Healthcare | $26.8M 1.03% | +$3.9M Bought | 0.513% 908.0K shares | 775.8K → 908.0K +$3.9M | +17.04% | $5.2B Mid Cap | Q2 2025 Held for 5 months | |
Engineering & Construction Industrials | $26.4M 1.01% | — | 0.356% 192.4K shares | — | — | $7.4B Mid Cap | Q3 2023 Held for 2y 2m | |
Software - Infrastructure Technology | $26.4M 1.01% | +$4.8M Bought | 0.848% 772.0K shares | 631.9K → 772.0K +$4.8M | +22.17% | $3.1B Mid Cap | Q3 2024 Held for 1y 2m | |
Hardware, Equipment & Parts Technology | $25.3M 0.97% | -$1.9M Sold | 0.603% 101.4K shares | 109.0K → 101.4K −$1.9M | -6.97% | $4.2B Mid Cap | Q3 2023 Held for 2y 2m | |
Engineering & Construction Industrials | $24.8M 0.951% | — | 0.716% 377.8K shares | — | — | $3.5B Mid Cap | Q1 2025 Held for 8 months | |
Biotechnology Healthcare | $24.8M 0.951% | -$164.8K Sold | 0.917% 721.7K shares | 726.5K → 721.7K −$164.8K | -0.66% | $2.7B Mid Cap | Q4 2022 Held for 2y 11m | |
Gambling, Resorts & Casinos Consumer Cyclical | $24.4M 0.936% | +$2.5M Bought | 1.25% 1.2M shares | 1.1M → 1.2M +$2.5M | +11.39% | $2.0B Small Cap | Q1 2024 Held for 1y 8m | |
Software - Application Technology | $24.3M 0.932% | +$509.7K Bought | 0.289% 128.6K shares | 125.9K → 128.6K +$509.7K | +2.14% | $8.4B Mid Cap | Q1 2025 Held for 8 months | |
Software - Application Technology | $24.2M 0.93% | +$101.8K Bought | — 2.1M shares | 2.1M → 2.1M +$101.8K | +0.42% | — — | Q4 2024 Held for 11 months | |
Leisure Consumer Cyclical | $23.9M 0.918% | +$1.5M Bought | 0.394% 866.4K shares | 812.3K → 866.4K +$1.5M | +6.66% | $6.1B Mid Cap | Q1 2025 Held for 8 months | |
Semiconductors Technology | $23.8M 0.912% | +$5.5M Bought | 0.282% 260.9K shares | 200.3K → 260.9K +$5.5M | +30.25% | $8.4B Mid Cap | Q2 2025 Held for 5 months | |
Industrial - Machinery Industrials | $22.6M 0.868% | -$946.9K Sold | 0.255% 272.7K shares | 284.2K → 272.7K −$946.9K | -4.02% | $8.9B Mid Cap | Q2 2023 Held for 2y 5m | |
Semiconductors Technology | $22.4M 0.861% | — | 0.467% 213.6K shares | — | — | $4.8B Mid Cap | Q1 2018 Held for 7y 8m | |
Software - Application Technology | $22.4M 0.859% | -$23.0K Sold | 0.228% 389.4K shares | 389.8K → 389.4K −$23.0K | -0.1% | $9.8B Mid Cap | Q4 2024 Held for 11 months | |
Unknown Unknown | $22.3M 0.855% | +$2.5M Bought | 0.509% 259.8K shares | 230.1K → 259.8K +$2.5M | +12.91% | $4.4B Mid Cap | Q2 2025 Held for 5 months | |
Semiconductors Technology | $22.1M 0.849% | -$215.4K Sold | 0.239% 177.8K shares | 179.5K → 177.8K −$215.4K | -0.96% | $9.3B Mid Cap | Q3 2024 Held for 1y 2m | |
Education & Training Services Consumer Defensive | $21.9M 0.841% | +$2.1M Bought | 0.355% 99.8K shares | 90.4K → 99.8K +$2.1M | +10.4% | $6.2B Mid Cap | Q4 2023 Held for 1y 11m | |
Unknown Unknown | $21.9M 0.839% | — | — 230.6K shares | — | — | — — | Q4 2023 Held for 1y 11m | |
Industrial - Machinery Industrials | $21.7M 0.835% | -$6.0M Sold | 0.313% 409.3K shares | 522.2K → 409.3K −$6.0M | -21.62% | $6.9B Mid Cap | Q2 2023 Held for 2y 5m | |
Information Technology Services Technology | $21.6M 0.831% | +$8.8M Bought | 0.297% 516.8K shares | 306.1K → 516.8K +$8.8M | +68.83% | $7.3B Mid Cap | Q3 2024 Held for 1y 2m | |
Auto - Manufacturers Consumer Cyclical | $21.5M 0.825% | — | 1.18% 373.4K shares | — | — | $1.8B Small Cap | Q1 2023 Held for 2y 8m | |
Aerospace & Defense Industrials | $21.2M 0.814% | — | 0.655% 236.5K shares | — | — | $3.2B Mid Cap | Q1 2025 Held for 8 months | |
Restaurants Consumer Cyclical | $21.2M 0.812% | +$8.7M Bought | 0.319% 404.5K shares | 238.0K → 404.5K +$8.7M | +69.96% | $6.6B Mid Cap | Q2 2024 Held for 1y 5m | |
Software - Application Technology | $21.2M 0.812% | +$18.1K Bought | 0.468% 292.3K shares | 292.0K → 292.3K +$18.1K | +0.09% | $4.5B Mid Cap | Q2 2024 Held for 1y 5m | |
Apparel - Manufacturers Consumer Cyclical | $21.1M 0.808% | +$21.1M New | 0.228% 903.5K shares | 0 → 903.5K +$21.1M | New | $9.2B Mid Cap | Q3 2025 Held for 2 months | |
Software - Infrastructure Technology | $21.1M 0.808% | -$51.6K Sold | 0.45% 652.3K shares | 653.9K → 652.3K −$51.6K | -0.24% | $4.7B Mid Cap | Q3 2024 Held for 1y 2m | |
Medical - Healthcare Information Services Healthcare | $20.9M 0.802% | +$3.3M Bought | 0.675% 193.9K shares | 162.9K → 193.9K +$3.3M | +19.04% | $3.1B Mid Cap | Q2 2024 Held for 1y 5m | |
Industrial - Infrastructure Operations Industrials | $20.8M 0.797% | — | 0.452% 221.6K shares | — | — | $4.6B Mid Cap | Q4 2024 Held for 11 months | |
Manufacturing - Metal Fabrication Industrials | $20.3M 0.778% | -$73.7K Sold | 0.166% 82.6K shares | 82.9K → 82.6K −$73.7K | -0.36% | $12.2B Large Cap | Q4 2023 Held for 1y 11m | |
Semiconductors Technology | $20.2M 0.775% | +$20.2M Bought | 0.201% 275.5K shares | — | — | $10.0B Large Cap | Q3 2025 Held for 2 months | |
Industrial - Pollution & Treatment Controls Industrials | $19.8M 0.76% | — | 0.274% 166.5K shares | — | — | $7.2B Mid Cap | Q3 2022 Held for 3y 2m |
