Oberweis Micro-Cap Fund (OBMCX) is an MF managed by Independent / Boutique. Its largest position is APPLIED OPTOELECTRONICS, INC. (AAOI), representing 8.65% of fund assets.
Oberweis Micro-Cap Fund Portfolio Holdings
Source: SEC Form N-PORT institutional portfolio disclosures
- Ticker:
- OBMCX
- Type:
- MF
- Manager:
- Independent / Boutique
- Total Assets:
- —
- Report Date:
- Mar 31, 2026
- Filing Date:
- May 29, 2026
| Holding | Weight | Market Value | Shares |
|---|---|---|---|
|
-
APPLIED OPTOELECTRONICS, INC.
|
8.65% | $90,850,928.85 | 1,074,015 |
|
-
Ultra Clean Holdings, Inc.
|
3.63% | $38,134,994.00 | 613,300 |
|
-
CAMTEK LTD
|
3.08% | $32,380,863.80 | 213,580 |
|
-
Silicon Motion Technology CORP
|
2.90% | $30,453,048.00 | 271,200 |
|
-
Fastly, Inc.
|
2.84% | $29,873,680.00 | 1,028,000 |
|
-
TUTOR PERINI CORP
|
2.78% | $29,162,382.00 | 377,800 |
|
-
Rush Street Interactive, Inc.
|
2.60% | $27,344,100.00 | 1,257,200 |
|
-
AMERICAN SUPERCONDUCTOR CORP /DE/
|
2.53% | $26,579,020.00 | 785,200 |
|
-
Primoris Services Corp
|
2.17% | $22,800,576.00 | 159,400 |
|
-
Blue Bird Corp
|
2.02% | $21,205,386.00 | 373,400 |
|
-
IMAX CORP
|
2.00% | $21,046,137.00 | 553,700 |
|
-
NLIGHT, INC.
|
1.89% | $19,831,556.00 | 347,800 |
|
-
National Vision Holdings, Inc.
|
1.89% | $19,829,040.00 | 765,600 |
|
-
LivaNova PLC
|
1.87% | $19,633,684.00 | 308,900 |
|
-
POWELL INDUSTRIES INC
|
1.69% | $17,747,424.00 | 32,800 |
|
-
ARGAN INC
|
1.64% | $17,265,405.00 | 31,700 |
|
-
CATALYST PHARMACEUTICALS INC
|
1.63% | $17,091,828.00 | 690,300 |
|
-
ANI PHARMACEUTICALS INC
|
1.56% | $16,341,250.00 | 212,500 |
|
-
EZCORP INC
|
1.48% | $15,555,402.00 | 612,900 |
|
-
GeneDx Holdings Corp.
|
1.48% | $15,528,396.00 | 241,800 |
|
-
PHIBRO ANIMAL HEALTH CORP
|
1.40% | $14,701,398.00 | 265,800 |
|
-
DIODES INC /DEL/
|
1.40% | $14,696,378.00 | 215,300 |
|
-
Kiniksa Pharmaceuticals International, plc
|
1.40% | $14,695,380.00 | 305,200 |
|
-
LEMAITRE VASCULAR INC
|
1.38% | $14,486,859.00 | 132,700 |
|
-
Pediatrix Medical Group, Inc.
|
1.37% | $14,386,914.00 | 672,600 |
|
-
Skyward Specialty Insurance Group, Inc.
|
1.31% | $13,715,520.00 | 314,000 |
|
-
Liquidia Corp
|
1.28% | $13,480,728.00 | 357,200 |
|
-
Arlo Technologies, Inc.
|
1.28% | $13,416,044.00 | 942,800 |
|
-
ProPetro Holding Corp.
|
1.27% | $13,329,250.00 | 925,000 |
|
-
AMBARELLA INC
|
1.25% | $13,141,567.50 | 255,300 |
|
-
DUCOMMUN INC /DE/
|
1.11% | $11,675,400.00 | 95,700 |
|
-
A10 Networks, Inc.
|
1.07% | $11,192,392.00 | 484,100 |
|
-
Dave Inc./DE
|
1.06% | $11,145,589.98 | 64,022 |
|
-
Axogen, Inc.
|
1.04% | $10,869,953.00 | 328,100 |
|
-
BENCHMARK ELECTRONICS INC
|
1.03% | $10,853,216.00 | 193,600 |
|
-
Adaptive Biotechnologies Corp
|
1.02% | $10,751,448.00 | 774,600 |
|
-
ONESPAWORLD HOLDINGS Ltd
|
1.02% | $10,680,930.00 | 465,400 |
|
-
NICOLET BANKSHARES INC
|
1.01% | $10,641,192.00 | 71,600 |
|
-
PRECISION DRILLING Corp
|
1.01% | $10,637,040.00 | 108,100 |
|
-
INTERFACE INC
|
1.01% | $10,598,476.00 | 425,300 |
|
-
Eton Pharmaceuticals, Inc.
|
0.99% | $10,387,812.00 | 420,900 |
|
-
Alphatec Holdings, Inc.
|
0.96% | $10,111,023.36 | 929,322 |
|
-
EPLUS INC
|
0.94% | $9,917,799.50 | 131,798 |
|
-
Evolv Technologies Holdings, Inc.
|
0.92% | $9,708,435.00 | 1,604,700 |
|
-
Boot Barn Holdings, Inc.
|
0.91% | $9,586,580.00 | 65,500 |
|
-
Amprius Technologies, Inc.
|
0.90% | $9,466,890.00 | 561,500 |
|
-
M/I HOMES, INC.
|
0.85% | $8,963,340.00 | 73,200 |
|
-
FB Financial Corp
|
0.77% | $8,071,476.00 | 155,400 |
|
-
CorMedix Inc.
|
0.75% | $7,892,696.00 | 1,162,400 |
|
-
ARTIVION, INC.
|
0.74% | $7,756,116.00 | 211,800 |
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