OBERWEIS ASSET MANAGEMENT INC/
Filing Date
Global Rank
#690
/ 8,232
▲ 190
Top Industry
Communication Equipment
12.6%
3Y Alpha vs SPY
-1.0%
Period ended 2 months ago
Filed May 15, 2026 · 30d
25 quarters · since Mar 2020
Clone Performance
Jun 2023–Jun 2026 · vs SPYHypothetical growth of cloning every reported 13F position and rebalancing on each filing, indexed to the same start.
Cloned portfolio
+72.2%
SPY
+76.3%
Annualised alpha
-1.0%
Max drawdown
−28.1%
Estimate. 13F holdings are quarter-lagged and long-only, so the clone rebalances about 45 days after each period end — when the filing becomes public — and excludes options and short positions. Past performance does not predict future results.
Portfolio Concentration
176 positions · as of Mar 31, 2026 · Δ vs Dec 31, 2025Top Position
5.9%
+2.1 pts
Top 5
18.5%
+4.7 pts
Top 10
26.1%
+5.1 pts
HHI
144
Diversified+37
Portfolio Trend
25 quarters · across all stocks
Sector Breakdown
As of Mar 31, 2026| Sector | % Portfolio | Value |
|---|---|---|
| Technology | 40.0% | $1,348,262,065 |
| Industrials | 18.5% | $622,319,740 |
| Healthcare | 18.2% | $613,646,922 |
| Consumer Cyclical | 12.5% | $419,950,562 |
| Financial Services | 4.3% | $144,332,468 |
| Energy | 3.7% | $125,545,425 |
| Communication Services | 1.4% | $47,898,359 |
| Consumer Defensive | 1.4% | $47,487,278 |
| Unclassified | 0.1% | $1,834,352 |
| Basic Materials | 0.0% | $522,238 |
Last Quarter's Activity
Export CSVAdded To
Positions the filer increased
25 positions
| Ticker | Company | Δ Shares | Shares | Value | Open |
|---|---|---|---|---|---|
| ATEC | Alphatec Holdings, Inc. | +907,893 | 1,908,293 | $20,762,227 | |
| DAN | DANA Inc | +815,000 | 1,611,500 | $54,226,975 | |
| EVLV | Evolv Technologies Holdings, Inc. | +594,049 | 1,671,949 | $10,115,291 | |
| ARQT | Arcutis Biotherapeutics, Inc. | +557,541 | 1,365,941 | $32,181,569 | |
| RELY | Remitly Global, Inc. | +451,500 | 1,454,300 | $22,788,881 | |
| CRMD | CorMedix Inc. | +406,000 | 1,211,115 | $8,223,470 | |
| FSLY | Fastly, Inc. | +381,222 | 1,071,022 | $31,123,899 | |
| CRDO | Credo Technology Group Holding Ltd | +346,580 | 1,021,968 | $95,932,136 | |
| WAY | Waystar Holding Corp. | +326,874 | 1,167,474 | $28,147,798 | |
| AAOI | Applied Optoelectronics, Inc. | +310,328 | 2,349,969 | $198,783,877 | |
| BTSG | BrightSpring Health Services, Inc. | +250,970 | 1,158,970 | $49,383,711 | |
| SGHC | Super Group (SGHC) Ltd | +245,900 | 1,514,400 | $16,355,520 | |
| AEO | American Eagle Outfitters Inc | +230,400 | 1,044,900 | $17,449,830 | |
| ALHC | Alignment Healthcare, Inc. | +219,100 | 966,600 | $17,031,492 | |
| BROS | Dutch Bros Inc. | +193,993 | 598,493 | $30,319,655 | |
| CPRX | Catalyst Pharmaceuticals, Inc. | +193,600 | 780,570 | $19,326,913 | |
| LEVI | Levi Strauss & Co | +173,400 | 1,167,300 | $21,583,377 | |
| SEI | Solaris Energy Infrastructure, Inc. | +164,989 | 531,889 | $30,057,047 | |
| CLMB | Climb Global Solutions, Inc. | +159,880 | 211,840 | $4,198,668 | |
| MMSI | Merit Medical Systems Inc | +155,449 | 424,209 | $29,240,726 | |
| DOCN | DigitalOcean Holdings, Inc. | +148,675 | 927,505 | $79,561,378 | |
| MD | Pediatrix Medical Group, Inc. | +141,100 | 701,087 | $14,996,250 | |
| MIR | Mirion Technologies, Inc. | +136,467 | 744,267 | $13,835,923 | |
| VISN | Vistance Networks, Inc. | +131,100 | 1,092,012 | $19,874,618 | |
| GMED | Globus Medical Inc | +122,200 | 392,200 | $33,791,952 | |
| No positions match the current search. | |||||
Trimmed
Positions the filer reduced
19 positions
| Ticker | Company | Δ Shares | Shares | Value | Open |
|---|---|---|---|---|---|
| FRSH | Freshworks Inc. | −1,996,720 | 57,750 | $463,732 | |
| WEAV | Weave Communications, Inc. | −926,250 | 72,830 | $336,474 | |
| AMBA | Ambarella Inc | −322,675 | 295,185 | $15,196,123 | |
| IBEX | IBEX Ltd | −231,600 | 10,200 | $273,564 | |
| LINC | Lincoln Educational Services Corp | −120,653 | 188,447 | $7,666,023 | |
| NYT | New York Times Co | −91,050 | 211,650 | $17,721,454 | |
| COCO | Vita Coco Company, Inc. | −77,292 | 156,108 | $7,479,134 | |
| IMAX | Imax Corp | −75,161 | 577,139 | $21,937,053 | |
| EHC | Encompass Health Corp | −69,486 | 289,485 | $28,001,884 | |
| AIR | Aar Corp | −27,575 | 245,125 | $26,831,382 | |
| MRCY | Mercury Systems Inc | −23,017 | 391,023 | $28,509,486 | |
| LITE | Lumentum Holdings Inc. | −14,708 | 266,222 | $187,090,172 | |
| POWL | Powell Industries Inc | −14,543 | 34,157 | $18,481,669 | |
| CECO | Ceco Environmental Corp | −10,476 | 135,032 | $8,045,206 | |
| FUTU | Futu Holdings Ltd | −6,500 | 4,500 | $615,420 | |
| MU | Micron Technology Inc | −3,800 | 700 | $236,488 | |
| WMT | Walmart Inc. | −50 | 2,137 | $265,586 | |
| BNY | Bank of New York Mellon Corp | −43 | 2,510 | $297,761 | |
| CAT | Caterpillar Inc | −40 | 408 | $289,051 | |
| No positions match the current search. | |||||
New Positions
Positions the filer opened this quarter
21 positions
| Ticker | Company | Shares | Value | Open |
|---|---|---|---|---|
| DRS | Leonardo DRS, Inc. | 449,500 | $20,011,740 | |
| INDV | Indivior Pharmaceuticals, Inc. | 653,413 | $19,916,028 | |
| CHYM | Chime Financial, Inc. | 1,035,530 | $19,395,476 | |
| HNGE | Hinge Health, Inc. | 465,766 | $17,959,936 | |
| NVST | Envista Holdings Corp | 665,400 | $16,881,198 | |
| SHAK | Shake Shack Inc. | 187,570 | $16,594,317 | |
| ARLO | Arlo Technologies, Inc. | 982,300 | $13,978,129 | |
| ATEN | A10 Networks, Inc. | 504,300 | $11,659,416 | |
| SBCF | Seacoast Banking Corp Of Florida | 378,866 | $11,475,851 | |
| AMPX | Amprius Technologies, Inc. | 585,000 | $9,863,100 | |
| THR | Thermon Group Holdings, Inc. | 154,700 | $7,796,880 | |
| APEI | American Public Education Inc | 130,400 | $7,417,152 | |
| BW | Babcock & Wilcox Enterprises, Inc. | 500,200 | $7,347,938 | |
| KN | Knowles Corp | 234,200 | $6,014,256 | |
| CNXN | Pc Connection Inc | 96,200 | $5,623,852 | |
| BRCB | Black Rock Coffee Bar, Inc. | 365,600 | $4,723,552 | |
| RCKY | Rocky Brands, Inc. | 118,000 | $4,568,960 | |
| ACMR | ACM Research, Inc. | 13,000 | $511,550 | |
| XOM | Exxon Mobil Corp | 1,303 | $221,066 | |
| FCX | Freeport-Mcmoran Inc | 3,590 | $211,020 | |
| MRK | Merck & Co., Inc. | 1,730 | $208,101 | |
| No positions match the current search. | ||||
Sold Out
Positions the filer fully exited
19 positions
| Ticker | Company | Shares | Value | Open |
|---|---|---|---|---|
| CARG | CarGurus, Inc. | 518,400 | $19,880,640 | |
| SXT | Sensient Technologies Corp | 188,000 | $17,662,600 | |
| GENI | Genius Sports Ltd | 1,585,900 | $17,476,618 | |
| ACIW | Aci Worldwide, Inc. | 330,702 | $15,810,862 | |
| CVLT | Commvault Systems Inc | 110,900 | $13,902,424 | |
| TPB | Turning Point Brands, Inc. | 103,500 | $11,219,400 | |
| WK | Workiva Inc | 127,500 | $10,996,875 | |
| GDOT | Green Dot Corp | 765,000 | $9,799,650 | |
| ATRC | AtriCure, Inc. | 217,992 | $8,623,763 | |
| BBW | Build-A-Bear Workshop Inc | 134,100 | $8,216,307 | |
| FRME | First Merchants Corp | 196,000 | $7,346,080 | |
| MBUU | Malibu Boats, Inc. | 244,100 | $6,886,061 | |
| HWKN | Hawkins Inc | 46,800 | $6,648,408 | |
| PGY | Pagaya Technologies Ltd. | 305,600 | $6,387,040 | |
| AIOT | Powerfleet, Inc. | 1,095,252 | $5,826,740 | |
| LYTS | Lsi Industries Inc | 173,400 | $3,176,688 | |
| MTRX | Matrix Service Co | 226,575 | $2,650,927 | |
| BLZE | Backblaze, Inc. | 552,023 | $2,572,427 | |
| SHOP | Shopify Inc. | 13,100 | $2,108,707 | |
| No positions match the current search. | ||||
176 positions ·
$3,371,799,409 total
· as of Mar 31, 2026
All sectors
Basic Materials
Communication Services
Consumer Cyclical
Consumer Defensive
Energy
Financial Services
Healthcare
Industrials
Technology
Showing 1–50
of 176 positions by value
· page 1 of 4
| Ticker | Company | Type | Shares | Value (USD) | % of Portfolio | History |
|---|---|---|---|---|---|---|
| AAOI |
Applied Optoelectronics, Inc.
Technology
|
Added | 2,349,969 | $198,783,877 | 5.90% | |
| LITE |
Lumentum Holdings Inc.
Technology
|
Reduced | 266,222 | $187,090,172 | 5.55% | |
| CRDO |
Credo Technology Group Holding Ltd
Technology
|
Added | 1,021,968 | $95,932,136 | 2.85% | |
| DOCN |
DigitalOcean Holdings, Inc.
Technology
|
Added | 927,505 | $79,561,378 | 2.36% | |
| SN |
SharkNinja, Inc.
Consumer Cyclical
|
Added | 599,970 | $63,536,823 | 1.88% | |
| NVMI |
Nova Ltd.
Technology
|
Added | 137,955 | $59,911,097 | 1.78% | |
| DAN |
DANA Inc
Consumer Cyclical
|
Added | 1,611,500 | $54,226,975 | 1.61% | |
| BTSG |
BrightSpring Health Services, Inc.
Healthcare
|
Added | 1,158,970 | $49,383,711 | 1.46% | |
| MTSI |
MACOM Technology Solutions Holdings, Inc.
Technology
|
Added | 215,886 | $47,941,804 | 1.42% | |
| RMBS |
Rambus Inc
Technology
|
Added | 526,316 | $45,278,965 | 1.34% | |
| CLH |
Clean Harbors Inc
Industrials
|
Added | 144,355 | $41,390,909 | 1.23% | |
| SITM |
SITIME Corp
Technology
|
Added | 119,281 | $41,193,693 | 1.22% | |
| UCTT |
Ultra Clean Holdings, Inc.
Technology
|
Added | 640,476 | $39,824,797 | 1.18% | |
| ECG |
Everus Construction Group, Inc.
Industrials
|
Added | 326,533 | $38,550,485 | 1.14% | |
| FTDR |
Frontdoor, Inc.
Consumer Cyclical
|
Added | 717,960 | $37,951,365 | 1.13% | |
| CRS |
Carpenter Technology Corp
Industrials
|
Added | 94,433 | $37,220,766 | 1.10% | |
| SKYW |
Skywest Inc
Industrials
|
Added | 392,499 | $36,043,183 | 1.07% | |
| LSCC |
Lattice Semiconductor Corp
Technology
|
Added | 374,436 | $34,732,683 | 1.03% | |
| GMED |
Globus Medical Inc
Healthcare
|
Added | 392,200 | $33,791,952 | 1.00% | |
| CAMT |
Camtek Ltd
Technology
|
Added | 222,780 | $33,775,675 | 1.00% | |
| ARQT |
Arcutis Biotherapeutics, Inc.
Healthcare
|
Added | 1,365,941 | $32,181,569 | 0.95% | |
| FLS |
Flowserve Corp
Industrials
|
Added | 434,681 | $31,953,400 | 0.95% | |
| SIMO |
Silicon Motion Technology CORP
Technology
|
Added | 282,550 | $31,727,539 | 0.94% | |
| LTH |
Life Time Group Holdings, Inc.
Consumer Cyclical
|
Added | 1,160,500 | $31,263,870 | 0.93% | |
| RSI |
Rush Street Interactive, Inc.
Consumer Cyclical
|
Added | 1,434,560 | $31,201,680 | 0.93% | |
| FCFS |
FirstCash Holdings, Inc.
Financial Services
|
Added | 165,665 | $31,145,020 | 0.92% | |
| FSLY |
Fastly, Inc.
Technology
|
Added | 1,071,022 | $31,123,899 | 0.92% | |
| TPC |
Tutor Perini Corp
Industrials
|
Added | 393,900 | $30,405,141 | 0.90% | |
| BROS |
Dutch Bros Inc.
Consumer Cyclical
|
Added | 598,493 | $30,319,655 | 0.90% | |
| SEI |
Solaris Energy Infrastructure, Inc.
Energy
|
Added | 531,889 | $30,057,047 | 0.89% | |
| MMSI |
Merit Medical Systems Inc
Healthcare
|
Added | 424,209 | $29,240,726 | 0.87% | |
| FSS |
Federal Signal Corp /De/
Industrials
|
Added | 267,634 | $28,941,940 | 0.86% | |
| AMSC |
American Superconductor Corp /De/
Industrials
|
Added | 849,900 | $28,769,115 | 0.85% | |
| MRCY |
Mercury Systems Inc
Industrials
|
Reduced | 391,023 | $28,509,486 | 0.85% | |
| ACA |
Arcosa, Inc.
Industrials
|
Added | 267,700 | $28,413,678 | 0.84% | |
| OSIS |
Osi Systems Inc
Technology
|
Added | 106,593 | $28,301,507 | 0.84% | |
| CNR |
Core Natural Resources, Inc.
Energy
|
Added | 269,800 | $28,256,154 | 0.84% | |
| WAY |
Waystar Holding Corp.
Healthcare
|
Added | 1,167,474 | $28,147,798 | 0.83% | |
| EHC |
Encompass Health Corp
Healthcare
|
Reduced | 289,485 | $28,001,884 | 0.83% | |
| VCYT |
Veracyte, Inc.
Healthcare
|
Added | 839,834 | $27,051,053 | 0.80% | |
| AIR |
Aar Corp
Industrials
|
Reduced | 245,125 | $26,831,382 | 0.80% | |
| ICUI |
Icu Medical Inc/De
Healthcare
|
Added | 203,710 | $26,309,146 | 0.78% | |
| LFUS |
Littelfuse Inc /De
Technology
|
Added | 71,800 | $24,365,330 | 0.72% | |
| PRIM |
Primoris Services Corp
Industrials
|
Added | 166,100 | $23,758,944 | 0.70% | |
| RELY |
Remitly Global, Inc.
Technology
|
Added | 1,454,300 | $22,788,881 | 0.68% | |
| G |
Genpact LTD
Technology
|
Added | 606,832 | $22,604,492 | 0.67% | |
| AIZ |
Assurant, Inc.
Financial Services
|
Added | 102,300 | $22,281,963 | 0.66% | |
| BLBD |
Blue Bird Corp
Industrials
|
Added | 389,238 | $22,104,826 | 0.66% | |
| IMAX |
Imax Corp
Communication Services
|
Reduced | 577,139 | $21,937,053 | 0.65% | |
| LEVI |
Levi Strauss & Co
Consumer Cyclical
|
Added | 1,167,300 | $21,583,377 | 0.64% |