Holdings Channel



Size ($ in 1000's)
At 12/31/2023: $1,073,585
At 09/30/2023: $941,464

Oberweis Asset Management Inc. holdings changes, total fund size, and other information presented on HoldingsChannel.com was derived from Oberweis Asset Management Inc. 13F filings. Link to 13F filings: SEC filings

Oberweis Asset Management Inc. Top Holdings
As of  12/31/2023, below is a summary of the Oberweis Asset Management Inc. top holdings by largest position size, as per the latest 13f filing made by Oberweis Asset Management Inc.. In the Oberweis Asset Management Inc.-top-holdings-table below, each of the top holdings by name is presented in the first column, followed by the amount of shares held by Oberweis Asset Management Inc. in that top holding, then the share count change between reporting periods, and finally the Oberweis Asset Management Inc. top holding position size for that row.

   EntityAmountChange
 09/30/2023 to 12/31/2023
Position Size
($ in 1000's)
Constellium NV Cl A 1,850,371 -1,082,700 $36,933
     CSTM1,850,371-1,082,700$36,933
Axcelis Technologies 245,329 +51,770 $31,817
     ACLS245,329+51,770$31,817
Aehr Test Systems 1,091,202 +181,094 $28,950
     AEHR1,091,202+181,094$28,950
Alphatec Hldgs Inc. 1,607,820 +371,780 $24,294
     ATEC1,607,820+371,780$24,294
Weatherford International PLC 240,060 +43,140 $23,485
     WFRD240,060+43,140$23,485
Amphastar Pharmaceuticals Inc 340,265 +187,765 $21,045
     AMPH340,265+187,765$21,045
Veracyte Inc. 656,810 +59,270 $18,069
     VCYT656,810+59,270$18,069
Applied Optoelectronics Inc. 891,915 +423,500 $17,232
     AAOI891,915+423,500$17,232
TransMedics Group Inc. 212,900 +61,800 $16,804
     TMDX212,900+61,800$16,804
Perion Network Ltd. 456,290 -14,000 $14,086
     PERI456,290-14,000$14,086
Universal Display Corp. 66,542 +4,527 $12,727
     OLED66,542+4,527$12,727
ADMA Biologics Inc. 2,710,700 +632,300 $12,252
     ADMA2,710,700+632,300$12,252
Camtek Ltd. 174,480 +8,100 $12,105
     CAMT174,480+8,100$12,105
Vertiv Holdings Co. 233,672 -147,318 $11,223
     VRT233,672-147,318$11,223
Axonics Inc. 178,470 +16,850 $11,106
     AXNX178,470+16,850$11,106
Oshkosh Corp. 98,899 +44,763 $10,722
     OSK98,899+44,763$10,722
Flowserve Corporation 245,271 +34,431 $10,110
     FLS245,271+34,431$10,110
Clean Harbors Inc. 57,055 +11,640 $9,957
     CLH57,055+11,640$9,957
Encompass Health Corporation 145,245 +33,645 $9,691
     EHC145,245+33,645$9,691
Frontdoor Inc. 271,100 +106,400 $9,548
     FTDR271,100+106,400$9,548
Haemonetics Corp. 105,880 +28,480 $9,054
     HAE105,880+28,480$9,054
ICF International Inc. 66,100 -29,600 $8,863
     ICFI66,100-29,600$8,863
Aerovironment Inc. 69,800 +700 $8,798
     AVAV69,800+700$8,798
CECO Environmental Corp. 426,700 +10,000 $8,653
     CECO426,700+10,000$8,653
Ultra Clean Holdings 247,100 +29,000 $8,436
     UCTT247,100+29,000$8,436
Parsons Corp. 133,000 +1,700 $8,340
     PSN133,000+1,700$8,340
Bel Fuse Inc. 124,300 +2,800 $8,300
     BELFB124,300+2,800$8,300
Zeta Global Holdings Corp. 935,480 +260,780 $8,251
     ZETA935,480+260,780$8,251
Merit Medical System Inc 107,090 +11,430 $8,135
     MMSI107,090+11,430$8,135
Power Integrations 98,195 +3,622 $8,063
     POWI98,195+3,622$8,063
Deckers Outdoor Corp. 12,045 -13,655 $8,051
     DECK12,045-13,655$8,051
FirstCash Holdings Inc 74,200 +12,500 $8,043
     FCFS74,200+12,500$8,043
Allegro MicroSystems Inc. 257,980 +32,050 $7,809
     ALGM257,980+32,050$7,809
Photronics Inc. 247,500 +17,400 $7,764
     PLAB247,500+17,400$7,764
Navitas Semiconductor Corp. 959,900 +47,400 $7,746
     NVTS959,900+47,400$7,746
Sterling Construction Co. Inc 88,000 -22,000 $7,738
     STRL88,000-22,000$7,738
Blue Bird Corporation 286,700 -19,800 $7,729
     BLBD286,700-19,800$7,729
ACM Research Inc. Class A 393,400 +51,600 $7,687
     ACMR393,400+51,600$7,687
Federal Signal Corp. 98,830 +7,430 $7,584
     FSS98,830+7,430$7,584
Veeco Instruments Inc. 240,000 +13,200 $7,447
     VECO240,000+13,200$7,447
SPX Technologies Inc. 73,000 +5,000 $7,374
     SPXC73,000+5,000$7,374
Evolent Health Inc. 214,540 -40,920 $7,086
     EVH214,540-40,920$7,086
Woodward Inc. 52,000 +3,200 $7,079
     WWD52,000+3,200$7,079
Integer Holdings Corporation 71,000 +71,000 $7,035
     ITGR71,000+71,000$7,035
Acadia Healthcare Co. Inc. 90,200 +12,400 $7,014
     ACHC90,200+12,400$7,014
Weave Communications Inc. 609,400 +85,800 $6,990
     WEAV609,400+85,800$6,990
Skywest Inc 133,700 +133,700 $6,979
     SKYW133,700+133,700$6,979
Primoris Services Corp. 209,900 +31,300 $6,971
     PRIM209,900+31,300$6,971
Inter Parfums 48,400 +6,800 $6,970
     IPAR48,400+6,800$6,970
Janus International Group Inc 528,400 +149,800 $6,896
     JBI528,400+149,800$6,896

See Full List: All Stocks Held By Oberweis Asset Management Inc.
— Including:
     • Biggest new positions
     • Biggest exits
     • Biggest increased positions
     • Biggest decreased positions

See Details: Top 10 Stocks Held By Oberweis Asset Management Inc.

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