2026 Q2 Portfolio Activity
In 2026 Q2, OBERWEIS ASSET MANAGEMENT INC/ maintained a portfolio of 202 distinct positions. The most significant new addition was Maxlinear, Inc. Class A, now representing 0.85% of the total fund value. They heavily accumulated shares in Silicon Motion Techn ADR, increasing the position by 12.0%. The fund also reduced its exposure to Lumentum Hldgs, Inc. by 72.9%.
Position History
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Total Positions
202
Quarter
2026 Q2
Top Holding
CRDO (5.7%)
Top 10 Concentration
26.6%
Turnover Rate
23.4%
Sector HHI
0.18
Items per page:
Showing 1-50 of 202
OBERWEIS ASSET MANAGEMENT INC/ Full Holdings List — 2026 Q2
| Stock | History | Sector / Type | Port % | Prev % | Rank / Prev | Conviction | Change | % Change | Influence | Shares | Mkt Value | Avg Cost | Price Held | 1st Owned | Source | Source Date | Date Reported | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
CRDO
Credo Technolog...
|
Technology | 5.69% | 2.83% |
#1
2
Prev: #3
|
4.8 |
—
|
-8,540 | -0.8% |
P
S
|
1,013,428 | $275,601,745 |
$49.38
+386.5%
|
2024 Q1 | 13F Filing | 2026-06-30 | 2026-08-14 | ||
|
AAOI
Applied Optoele...
|
Technology | 5.48% | 5.87% |
#2
1
Prev: #1
|
3.7 |
—
|
-558,842 | -23.8% |
P
S
|
1,791,127 | $265,373,376 | 2016 Q3 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
DOCN
DigitalOcean Ho...
|
Technology | 3.02% | 2.35% |
#3
1
Prev: #4
|
2.7 |
—
|
2,500 | 0.3% |
P
S
|
930,005 | $146,038,685 | 2024 Q3 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
SIMO
Silicon Motion ...
|
Technology | 2.18% | 0.94% |
#4
19
Prev: #23
|
3.4 |
—
|
33,800 | 12.0% |
P
S
|
316,350 | $105,448,946 | 2005 Q2 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
UCTT
Ultra Clean Hol...
|
Technology | 1.91% | 1.18% |
#5
8
Prev: #13
|
1.8 |
—
|
6,800 | 1.1% |
P
S
|
647,276 | $92,295,085 | 2010 Q1 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
SN
SharkNinja, Inc...
|
Consumer Cyclical | 1.87% | 1.88% |
#6
1
Prev: #5
|
1.2 |
—
|
-6,470 | -1.1% |
P
S
|
593,500 | $90,372,245 | 2014 Q1 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
SITM
SiTime Corporat...
|
Technology | 1.84% | 1.22% |
#7
5
Prev: #12
|
1.2 |
—
|
220 | 0.2% |
P
S
|
119,501 | $89,095,166 | 2023 Q1 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
BTSG
BrightSpring He...
|
Healthcare | 1.71% | 1.46% |
#8
Prev: #8
|
1.2 |
—
|
26,310 | 2.3% |
P
S
|
1,185,280 | $82,661,427 | 2025 Q2 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
HNGE
Hinge Health, I...
|
Healthcare | 1.47% | 0.53% |
#9
62
Prev: #71
|
3.6 |
—
|
389,710 | 83.7% |
P
S
|
855,476 | $71,004,508 | 2026 Q1 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
RMBS
Rambus, Inc
|
Technology | 1.45% | 1.34% |
#10
Prev: #10
|
1.1 |
—
|
700 | 0.1% |
P
S
|
527,016 | $69,956,104 | 2024 Q4 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
MTSI
Macom Technolog...
|
Technology | 1.41% | 1.42% |
#11
2
Prev: #9
|
1.1 |
—
|
-36,530 | -16.9% |
P
S
|
179,356 | $68,221,642 | 2020 Q3 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
LITE
Lumentum Hldgs,...
|
Technology | 1.28% | 5.53% |
#12
10
Prev: #2
|
0.5 |
—
|
-194,037 | -72.9% |
P
S
|
72,185 | $61,939,061 | 2017 Q1 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
LSCC
Lattice Semicon...
|
Technology | 1.24% | 1.03% |
#13
5
Prev: #18
|
1.0 |
—
|
17,380 | 4.6% |
P
S
|
391,816 | $59,932,175 | 2014 Q2 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
NVMI
Nova Ltd.
|
Technology | 1.22% | 1.77% |
#14
8
Prev: #6
|
0.5 |
—
|
-29,280 | -21.2% |
P
S
|
108,675 | $59,004,005 | 2009 Q4 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
CRS
Carpenter Techn...
|
Industrials | 1.19% | 1.10% |
#15
1
Prev: #16
|
1.0 |
—
|
-1,160 | -1.2% |
P
S
|
93,273 | $57,534,775 | 2017 Q4 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
FTDR
Frontdoor, Inc.
|
Consumer Cyclical | 1.15% | 1.12% |
#16
1
Prev: #15
|
1.0 |
—
|
1,100 | 0.2% |
P
S
|
719,060 | $55,791,865 | 2023 Q2 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
ECG
Everus Construc...
|
Industrials | 1.13% | 1.14% |
#17
3
Prev: #14
|
1.0 |
—
|
1,650 | 0.5% |
P
S
|
328,183 | $54,461,969 | 2025 Q2 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
VCYT
Veracyte, Inc.
|
Healthcare | 1.07% | 0.80% |
#18
22
Prev: #40
|
0.9 |
—
|
37,900 | 4.5% |
P
S
|
877,734 | $51,549,318 | 2018 Q3 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
POWL
Powell Industri...
|
Industrials | 1.06% | 0.55% |
#19
48
Prev: #67
|
3.4 |
—
|
145,364 | 425.6% |
P
S
|
179,521 | $51,407,634 | 2018 Q3 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
LTH
Life Time Holdi...
|
Consumer Cyclical | 1.00% | 0.92% |
#20
4
Prev: #24
|
0.9 |
—
|
29,120 | 2.5% |
P
S
|
1,189,620 | $48,584,081 | 2025 Q1 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
RSI
Rush Street Int...
|
Consumer Cyclical | 1.00% | 0.92% |
#21
4
Prev: #25
|
2.4 |
—
|
193,370 | 13.5% |
P
S
|
1,627,930 | $48,414,638 | 2024 Q1 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
MRCY
Mercury Systems...
|
Industrials | 0.99% | 0.84% |
#22
12
Prev: #34
|
0.9 |
—
|
1,700 | 0.4% |
P
S
|
392,723 | $48,041,805 | 1999 Q4 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
BROS
Dutch Bros., In...
|
Consumer Cyclical | 0.97% | 0.90% |
#23
6
Prev: #29
|
2.4 |
—
|
57,600 | 9.6% |
P
S
|
656,093 | $47,114,038 | 2024 Q2 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
CLH
Clean Harbors, ...
|
Industrials | 0.95% | 1.22% |
#24
13
Prev: #11
|
2.4 |
—
|
9,120 | 6.3% |
P
S
|
153,475 | $45,850,656 | 2019 Q1 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
SEI
Solaris Energy ...
|
Energy | 0.94% | 0.89% |
#25
5
Prev: #30
|
2.4 |
—
|
32,692 | 6.1% |
P
S
|
564,581 | $45,426,174 | 2018 Q3 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
DIOD
Diodes, Inc.
|
Technology | 0.94% | 0.45% |
#26
63
Prev: #89
|
3.4 |
—
|
189,450 | 84.5% |
P
S
|
413,750 | $45,280,800 | 2000 Q2 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
ACA
Arcosa, Inc.
|
Industrials | 0.89% | 0.84% |
#27
8
Prev: #35
|
2.4 |
—
|
27,750 | 10.4% |
P
S
|
295,450 | $42,925,931 | 2019 Q4 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
BLBD
Blue Bird Corpo...
|
Industrials | 0.86% | 0.65% |
#28
20
Prev: #48
|
2.8 |
—
|
140,600 | 36.1% |
P
S
|
529,838 | $41,836,008 | 2023 Q1 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
CAMT
Camtek, Ltd.
|
Technology | 0.85% | 1.00% |
#29
9
Prev: #20
|
2.3 |
—
|
30,600 | 13.7% |
P
S
|
253,380 | $41,331,346 | 2018 Q1 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
LIVN
LivaNova Plc
|
Healthcare | 0.85% | 0.60% |
#30
25
Prev: #55
|
3.3 |
—
|
178,250 | 55.4% |
P
S
|
500,150 | $41,127,335 | 2023 Q4 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
AMSC
American Superc...
|
Industrials | 0.85% | 0.85% |
#31
2
Prev: #33
|
2.3 |
—
|
137,600 | 16.2% |
P
S
|
987,500 | $40,991,125 | 2009 Q2 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
MXL
Maxlinear, Inc....
|
Technology | 0.85% | — |
#32
Prev: #—
|
3.8 |
—
|
319,500 | — |
NEW
|
319,500 | $40,905,585 | 2012 Q3 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
GMED
Globus Medical,...
|
Healthcare | 0.84% | 1.00% |
#33
14
Prev: #19
|
2.8 |
—
|
119,900 | 30.6% |
P
S
|
512,100 | $40,461,021 | 2015 Q4 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
NOVT
Novanta, Inc.
|
Technology | 0.82% | — |
#34
Prev: #—
|
3.8 |
—
|
244,260 | — |
NEW
|
244,260 | $39,628,742 | 2022 Q3 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
SKYW
Skywest Inc
|
Industrials | 0.79% | 1.06% |
#35
18
Prev: #17
|
0.8 |
—
|
-8,700 | -2.2% |
P
S
|
383,799 | $38,122,755 | 2015 Q2 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
VIAV
Viavi Solutions...
|
Technology | 0.78% | 0.58% |
#36
26
Prev: #62
|
2.8 |
—
|
200,400 | 33.8% |
P
S
|
793,600 | $37,894,400 | 2019 Q3 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
MOG/A
Moog Inc. - A
|
Industrials | 0.76% | 0.39% |
#37
64
Prev: #101
|
3.3 |
—
|
41,825 | 93.1% |
P
S
|
86,735 | $36,761,762 | 2026 Q1 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
LFUS
Littelfuse, Inc...
|
Technology | 0.75% | 0.72% |
#38
5
Prev: #43
|
2.3 |
—
|
8,000 | 11.1% |
P
S
|
79,800 | $36,335,334 | 2023 Q2 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
ARQT
Arcutis Biother...
|
Healthcare | 0.74% | 0.95% |
#39
18
Prev: #21
|
0.8 |
—
|
7,000 | 0.5% |
P
S
|
1,372,941 | $35,998,513 | 2025 Q4 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
FCFS
FirstCash Holdi...
|
Financial Services | 0.74% | 0.92% |
#40
14
Prev: #26
|
0.8 |
—
|
440 | 0.3% |
P
S
|
166,105 | $35,931,834 | 2022 Q2 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
BLLN
Billiontoone, I...
|
Healthcare | 0.74% | — |
#41
Prev: #—
|
3.8 |
—
|
299,030 | — |
NEW
|
299,030 | $35,877,619 | 2026 Q2 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
DAN
Dana Inc.
|
Consumer Cyclical | 0.74% | 1.60% |
#42
35
Prev: #7
|
0.8 |
—
|
-293,200 | -18.2% |
P
S
|
1,318,300 | $35,870,943 | 2018 Q2 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
ESI
Element Solutio...
|
Basic Materials | 0.73% | — |
#43
Prev: #—
|
3.8 |
—
|
740,100 | — |
NEW
|
740,100 | $35,339,775 | 2026 Q2 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
AIR
AAR Corp.
|
Industrials | 0.73% | 0.79% |
#44
3
Prev: #41
|
0.8 |
—
|
1,200 | 0.5% |
P
S
|
246,325 | $35,207,232 | 2006 Q1 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
RELY
Remitly Global,...
|
Technology | 0.73% | 0.67% |
#45
Prev: #45
|
2.3 |
—
|
116,100 | 8.0% |
P
S
|
1,570,400 | $35,192,664 | 2025 Q2 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
ICUI
ICU Medical, In...
|
Healthcare | 0.72% | 0.78% |
#46
4
Prev: #42
|
2.3 |
—
|
33,340 | 16.4% |
P
S
|
237,050 | $34,751,530 | 2024 Q3 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
FSS
Federal Signal ...
|
Industrials | 0.71% | 0.85% |
#47
15
Prev: #32
|
0.8 |
—
|
1,450 | 0.5% |
P
S
|
269,084 | $34,574,603 | 2017 Q4 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
OUST
Ouster, Inc.
|
Technology | 0.71% | — |
#48
Prev: #—
|
3.8 |
—
|
545,810 | — |
NEW
|
545,810 | $34,124,041 | 2026 Q2 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
LEVI
Levi Strauss & ...
|
Consumer Cyclical | 0.70% | 0.64% |
#49
1
Prev: #50
|
2.3 |
—
|
190,800 | 16.3% |
P
S
|
1,358,100 | $33,721,623 | 2025 Q3 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
MMSI
Merit Medical S...
|
Healthcare | 0.68% | 0.86% |
#50
19
Prev: #31
|
2.3 |
—
|
49,200 | 11.6% |
P
S
|
473,409 | $32,826,180 | 2014 Q1 | 13F Filing | 2026-06-30 | 2026-08-14 |
Showing 1-50 of 202 holdings