OBERWEIS ASSET MANAGEMENT INC/
Top Portfolio Positions
177 positions ·
$3,384,941,871 total
· as of Mar 31, 2026
| Ticker | Company | Shares | Value (USD) | % of Portfolio | Open |
|---|---|---|---|---|---|
| AAOI |
Applied Optoelectronics, Inc.
Technology
|
2,349,969 | $198,783,877 | 5.87% | |
| LITE |
Lumentum Holdings Inc.
Technology
|
266,222 | $187,090,172 | 5.53% | |
| CRDO |
Credo Technology Group Holding Ltd
Technology
|
1,021,968 | $95,932,136 | 2.83% | |
| DOCN |
DigitalOcean Holdings, Inc.
Technology
|
927,505 | $79,561,378 | 2.35% | |
| SN |
SharkNinja, Inc.
Consumer Cyclical
|
599,970 | $63,536,823 | 1.88% | |
| NVMI |
Nova Ltd.
Technology
|
137,955 | $59,911,097 | 1.77% | |
| DAN |
DANA Inc
Consumer Cyclical
|
1,611,500 | $54,226,975 | 1.60% | |
| BTSG |
BrightSpring Health Services, Inc.
Healthcare
|
1,158,970 | $49,383,711 | 1.46% | |
| MTSI |
MACOM Technology Solutions Holdings, Inc.
Technology
|
215,886 | $47,941,804 | 1.42% | |
| RMBS |
Rambus Inc
Technology
|
526,316 | $45,278,965 | 1.34% |
Portfolio Trend
25 quarters · across all stocks
Holdings in ATEC
Shares Held
Position Value (USD)
19 quarters on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-03-31 | $20,762,227 | 1,908,293 | Shares | Sole | 2026-05-15 | |
| 2025-12-31 | $21,048,416 | 1,000,400 | Shares | Sole | 2026-02-17 | |
| 2025-09-30 | $6,704,713 | 461,122 | Shares | Sole | 2025-11-17 | |
| 2024-06-30 | $13,870,912 | 1,327,360 | Shares | Sole | 2024-08-14 | |
| 2024-03-31 | $19,111,285 | 1,385,880 | Shares | Sole | 2024-05-15 | |
| 2023-12-31 | $24,294,160 | 1,607,820 | Shares | Sole | 2024-02-14 | |
| 2023-09-30 | $16,031,438 | 1,236,040 | Shares | Sole | 2023-11-14 | |
| 2023-06-30 | $17,628,850 | 980,470 | Shares | Sole | 2023-08-14 | |
| 2023-03-31 | $10,585,068 | 678,530 | Shares | Sole | 2023-05-15 | |
| 2022-12-31 | $6,215,631 | 503,290 | Shares | Sole | 2023-02-14 | |
| 2022-09-30 | $3,955,374 | 452,560 | Shares | Sole | 2022-11-14 | |
| 2022-06-30 | $2,630,126 | 402,160 | Shares | Sole | 2022-08-15 | |
| 2022-03-31 | $5,129,690 | 446,060 | Shares | Sole | 2022-05-16 | |
| 2021-12-31 | $7,705,763 | 674,170 | Shares | Sole | 2022-02-14 | |
| 2021-09-30 | $7,070,565 | 580,030 | Shares | Sole | 2021-11-15 | |
| 2021-06-30 | $6,672,319 | 435,530 | Shares | Sole | 2021-08-16 | |
| 2021-03-31 | $6,875,913 | 435,460 | Shares | Sole | 2021-05-17 | |
| 2020-12-31 | $3,824,568 | 263,400 | Shares | Sole | 2021-02-16 | |
| 2020-09-30 | $913,664 | 137,600 | Shares | Sole | 2020-11-16 | |
| No 13F history on record for this holder in this stock. | ||||||