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OBERWEIS ASSET MANAGEMENT INC/ 13F 持仓明细(2026-03-31) · 小隐寺数据中心
OBERWEIS ASSET MANAGEMENT INC/
报告期 2026-03-31 · CIK 0000937886
持仓数
180
前50大市值合计
$2.09B
报告期
2026-03-31
当前持仓
调仓
组合演变
前 6 大持仓 + 其他 逐季市值($B) · 点图或下方季度看该季调仓
看某季调仓:
26Q1
25Q4
25Q3
25Q2
25Q1
24Q4
24Q3
24Q2
24Q1
23Q4
23Q3
23Q2
23Q1
22Q4
22Q3
22Q2
22Q1
21Q4
21Q3
23Q4 调仓
2023-09-30 → 2023-12-31 · 共 150 项
建仓 38
增持 63
减持 11
清仓 38
方向
标的
Δ市值
现股数(环比)
减持
—
Constellium NV Cl A
-$16.4M
1,850,371
-37%
增持
AMPH
Amphastar Pharmaceuticals, Inc
+$14.0M
340,265
+123%
增持
AEHR
Aehr Test Systems
-$12.6M
1,091,202
+20%
调仓由相邻两季 13F 持仓相减推导(非逐笔成交);方向按股数增减,Δ市值受股价波动影响、符号可与方向相反;13F 申报滞后最长 45 天。
增持
AAOI
Applied Optoelectronics Inc.
+$12.1M
891,915
+90%
清仓
LNTH
Lantheus Hldgs Inc.
-$11.8M
0
-100%
清仓
EXTR
Extreme Networks, Inc.
-$9.2M
0
-100%
清仓
BDC
Belden, Inc.
-$8.8M
0
-100%
增持
TMDX
TransMedics Group, Inc.
+$8.5M
212,900
+41%
增持
ATEC
Alphatec Hldgs Inc.
+$8.3M
1,607,820
+30%
建仓
ITGR
Integer Holdings Corporation
+$7.0M
71,000
建仓
SKYW
Skywest Inc
+$7.0M
133,700
建仓
ESAB
ESAB Corporation
+$6.9M
79,100
建仓
YOU
Clear Secure, Inc.
+$6.3M
303,500
建仓
—
Thermon Group Hldgs Inc.
+$6.2M
190,700
清仓
—
Model N, Inc.
-$5.9M
0
-100%
增持
—
Weatherford International PLC
+$5.7M
240,060
+22%
清仓
ALSN
Allison Transmission Holdings,
-$5.6M
0
-100%
增持
OSK
Oshkosh Corp.
+$5.6M
98,899
+83%
清仓
—
SeaWorld Entertainment Inc.
-$5.5M
0
-100%
清仓
—
Inmode Ltd.
-$5.5M
0
-100%
清仓
—
CIRCOR International, Inc.
-$5.5M
0
-100%
建仓
RAMP
Liveramp Hldgs, Inc.
+$5.3M
139,000
建仓
AIZ
Assurant, Inc.
+$5.2M
30,700
建仓
—
Informatica Corp.
+$5.2M
182,100
减持
DECK
Deckers Outdoor Corp.
-$5.2M
12,045
-53%
建仓
CVSA
Adtalem Global Education Inc.
+$5.1M
86,500
建仓
—
Carrols Restaurant Group, Inc.
+$4.9M
623,500
清仓
—
Earthstone Energy Inc.
-$4.9M
0
-100%
增持
ADMA
ADMA Biologics, Inc.
+$4.8M
2,710,700
+30%
清仓
HXL
Hexcel Corporation
-$4.8M
0
-100%
建仓
MSA
MSA Safety Inc
+$4.7M
28,100
清仓
LYTS
LSI Industries Inc.
-$4.7M
0
-100%
增持
VCYT
Veracyte, Inc.
+$4.7M
656,810
+10%
清仓
—
Applied Industrial
-$4.7M
0
-100%
建仓
SIMO
Silicon Motion Techn ADR
+$4.7M
76,400
清仓
TMCI
Treace Medical Concepts, Inc.
-$4.7M
0
-100%
清仓
TCMD
Tactile Sys Technology, Inc.
-$4.6M
0
-100%
建仓
PRLB
Proto Labs Inc.
+$4.6M
117,400
建仓
—
Vital Energy, Inc.
+$4.5M
99,700
建仓
LMB
Limbach Hldgs, Inc.
+$4.5M
99,494
增持
FTDR
Frontdoor, Inc.
+$4.5M
271,100
+65%
清仓
—
SP Plus Corporation
-$4.4M
0
-100%
建仓
ACIW
ACI Worldwide Inc.
+$4.4M
144,262
清仓
ALGT
Allegiant Travel Co.
-$4.4M
0
-100%
清仓
GVA
Granite Construction
-$4.4M
0
-100%
清仓
DGII
Digi International I
-$4.3M
0
-100%
增持
UPWK
Upwork, Inc.
+$4.3M
396,900
+177%
清仓
BOOM
DMC Global, Inc.
-$4.3M
0
-100%
建仓
AMSC
American Superconductor
+$4.2M
375,800
建仓
EOLS
Evolus, Inc.
+$3.9M
371,400
建仓
—
LivaNova Plc
+$3.8M
74,200
清仓
UNM
UNUM Group
-$3.8M
0
-100%
清仓
PTEN
Patterson-Uti Energy, Inc.
-$3.6M
0
-100%
清仓
—
Haynes Intl, Inc.
-$3.5M
0
-100%
建仓
LOPE
Grand Canyon Education, Inc.
+$3.5M
26,800
建仓
—
OneSpaWorld Holdings Limited
+$3.5M
248,400
建仓
RXST
RxSight, Inc.
+$3.4M
83,100
清仓
CIEN
Ciena Corporation
-$3.3M
0
-100%
清仓
—
Everi Hldgs, Inc.
-$3.3M
0
-100%
建仓
PDS
Precision Drilling Corp.
+$3.2M
59,700
清仓
ATEN
A10 Networks, Inc.
-$3.2M
0
-100%
清仓
SHLS
Shoals Technology Group, Inc.
-$3.2M
0
-100%
增持
PLAB
Photronics, Inc.
+$3.1M
247,500
+8%
清仓
AMLX
Amylyx Pharmaceuticals, Inc.
-$3.1M
0
-100%
清仓
CHEF
The Chefs Warehouse, Inc.
-$3.1M
0
-100%
增持
GIII
G-III Apparel Group Ltd.
+$3.1M
196,600
+37%
增持
MHO
M/I Homes, Inc.
+$3.0M
48,800
+10%
增持
OLED
Universal Display Corp.
+$3.0M
66,542
+7%
减持
VRT
Vertiv Holdings Co.
-$2.9M
233,672
-39%
清仓
SCSC
Scansource, Inc.
-$2.9M
0
-100%
建仓
—
Dorian LPG Ltd.
+$2.9M
65,500
增持
JBI
Janus International Group, Inc
+$2.8M
528,400
+40%
建仓
SKWD
Skyward Specialty Ins Group
+$2.8M
81,800
建仓
—
Rev Group, Inc.
+$2.8M
151,700
增持
NEO
NeoGenomics, Inc.
+$2.7M
392,700
+34%
建仓
COCO
The Vita Coco Co., Inc.
+$2.7M
106,600
增持
WEAV
Weave Communications, Inc.
+$2.7M
609,400
+16%
增持
BJRI
BJ's Restaurants, Inc.
+$2.7M
148,600
+32%
减持
ICFI
ICF International, Inc.
-$2.7M
66,100
-31%
建仓
AAON
AAON, Inc.
+$2.7M
36,300
建仓
DY
Dycom Industries, Inc.
+$2.6M
23,000
增持
—
Fabrinet
+$2.6M
33,200
+50%
增持
ZETA
Zeta Global Holdings Corp.
+$2.6M
935,480
+39%
建仓
BLKB
Blackbaud
+$2.6M
30,100
建仓
HQY
HealthEquity Inc.
+$2.6M
38,700
减持
VC
Visteon Corp.
-$2.5M
43,770
-24%
建仓
CRS
Carpenter Technology Corp.
+$2.5M
35,700
建仓
LRN
Stride, Inc.
+$2.5M
42,500
增持
—
Rover Group, Inc.
+$2.5M
466,200
+14%
增持
BELFB
Bel Fuse, Inc.
+$2.5M
124,300
+2%
建仓
LNWO
Light & Wonder Inc.
+$2.5M
30,100
建仓
—
Hibbett, Inc.
+$2.5M
34,100
增持
CPRX
Catalyst Pharmaceuticals, Inc.
+$2.4M
348,600
+19%
建仓
TRNS
Transcat, Inc.
+$2.4M
21,800
增持
CLH
Clean Harbors, Inc.
+$2.4M
57,055
+26%
清仓
ARRY
Array Biopharma
-$2.3M
0
-100%
清仓
MUSA
Murphy USA, Inc.
-$2.3M
0
-100%
建仓
MIRM
Mirum Pharmaceuticals, Inc.
+$2.3M
77,400
减持
CROX
Crocs, Inc.
-$2.3M
50,000
-36%
建仓
EPAC
Enerpac Tool Group Corp.
+$2.2M
71,300
增持
EHC
Encompass Health Corporation
+$2.2M
145,245
+30%
减持
CRK
Comstock Res
-$2.1M
72,295
-71%
增持
FSS
Federal Signal Corp.
+$2.1M
98,830
+8%
增持
HAE
Haemonetics Corp.
+$2.1M
105,880
+37%
增持
CDRE
Cadre Hldgs, Inc.
+$2.1M
102,400
+116%
清仓
WAFD
Washington Federal, Inc.
-$2.0M
0
-100%
增持
—
Axonics, Inc.
+$2.0M
178,470
+10%
增持
CECO
CECO Environmental Corp.
+$2.0M
426,700
+2%
清仓
TXRH
Texas Roadhouse
-$2.0M
0
-100%
增持
UCTT
Ultra Clean Holdings
+$2.0M
247,100
+13%
清仓
PI
Impinj, Inc.
-$2.0M
0
-100%
增持
VSEC
VSE Corp.
+$1.9M
66,300
+39%
清仓
DXLG
Destination XL Group, Inc.
-$1.9M
0
-100%
清仓
ASTE
Astec Inds Inc.
-$1.9M
0
-100%
增持
FCFS
FirstCash Holdings, Inc
+$1.8M
74,200
+20%
增持
SPXC
SPX Technologies, Inc.
+$1.8M
73,000
+7%
清仓
VPG
Vishay Precision Group
-$1.8M
0
-100%
增持
—
Camtek, Ltd.
+$1.7M
174,480
+5%
增持
FLS
Flowserve Corporation
+$1.7M
245,271
+16%
增持
ELF
e.l.f. Beauty, Inc.
+$1.7M
28,500
+31%
增持
—
PetlQ Inc
+$1.7M
304,400
+39%
增持
KWR
Quaker Chemical Corporation
+$1.7M
27,000
+6%
增持
HALO
Halozyme Therapeutics, Inc.
+$1.6M
96,300
+91%
增持
JELD
JELD-WEN Holding, Inc.
+$1.6M
260,200
+5%
减持
OPCH
Option Care Health Inc.
-$1.6M
113,700
-32%
增持
ONTO
Onto Innovation, Inc.
+$1.6M
44,600
+9%
增持
OSIS
Osi Systems, Inc.
+$1.6M
35,300
+39%
增持
ACHC
Acadia Healthcare Co., Inc.
+$1.5M
90,200
+16%
增持
MMSI
Merit Medical System Inc
+$1.5M
107,090
+12%
增持
WING
Wingstop, Inc.
+$1.5M
15,900
+12%
增持
ACMR
ACM Research, Inc. Class A
+$1.5M
393,400
+15%
增持
TREX
Trex Company, Inc.
+$1.4M
40,100
+32%
增持
NVTS
Navitas Semiconductor Corp.
+$1.4M
959,900
+5%
增持
PFBC
Preferred Bank
+$1.4M
89,600
+8%
增持
IPAR
Inter Parfums
+$1.4M
48,400
+16%
清仓
ALTG
Alta Equipment Group, Inc.
-$1.3M
0
-100%
增持
MOD
Modine Mfg Co Com
+$1.3M
86,500
+2%
增持
FIX
Comfort Systems USA Inc.
+$1.3M
17,700
+26%
减持
EIG
Employers Holdings, Inc.
-$1.2M
82,500
-26%
增持
PSN
Parsons Corp.
+$1.2M
133,000
+1%
增持
—
H&E Equipment Services, Inc.
+$1.2M
98,900
+7%
减持
BLBD
Blue Bird Corporation
+$1.2M
286,700
-6%
增持
FSLY
Fastly, Inc.
+$1.2M
249,800
+47%
减持
VVX
V2X, Inc.
-$1.1M
100,700
-10%
增持
PRIM
Primoris Services Corp.
+$1.1M
209,900
+18%
增持
—
Super Micro Computer Inc.
+$1.1M
19,100
+22%
增持
SSD
Simpson Manufacturing
+$1.1M
16,800
+14%
增持
AVAV
Aerovironment, Inc.
+$1.1M
69,800
+1%
增持
VECO
Veeco Instruments, Inc.
+$1.1M
240,000
+6%
增持
WWD
Woodward, Inc.
+$1.0M
52,000
+7%
