What is SEC Form 13F? Ultimate Guide to Institutional Equity Filings
Learn how SEC Form 13F filings work, the $100M threshold, 45-day reporting lag, and how to track top hedge fund holdings.
CIK: 0000937886
Total reported value
$4.8B
$4.8B
179 檔
7.7%
During the Q4 2025 filing period, Oberweis Asset Management Inc/ (CIK: 0000937886) submitted its Form 13F report to the U.S. SEC, disclosing a tracked public equity portfolio valued at $4.8B across 179 reported positions.
In Q4 2025, Oberweis Asset Management Inc/ displayed an active expansion posture, initiating 21 new positions and adding to 103 existing holdings, outstripping position reductions.
| # | Ticker | Issuer | Asset Subclass | Weight | Weight Change | Shares Change | 4Q Trend |
|---|---|---|---|---|---|---|---|
| 1 | LITE | Lumentum Holdings Inc | Stock-Tech | 3.79% | -4.25% | -14.51% | |
| 2 | CRDO | Credo Technology Group Holding Ltd | Stock-Tech | 3.55% | +2.86% | +4.88% | |
| 3 | AAOI | Applied Optoelectronics Inc | Stock-Tech | 2.60% | -0.39% | +8.03% | |
| 4 | SN | SharkNinja, Inc. | Stock-Consumer Disc | 2.15% | -0.01% | +9.01% | |
| 5 | AMBA | Ambarella, Inc. | Stock-Tech | 1.60% | +0.16% | +1.06% | |
| 6 | RMBS | Rambus Inc | Stock-Tech | 1.55% | +0.11% | -9.02% | |
| 7 | SKYW | Skywest Inc | Stock-Industrials | 1.40% | -0.27% | +15.55% | |
| 8 | EHC | Encompass Health CORP | Stock-Healthcare | 1.39% | -0.17% | +0.05% | |
| 9 | SITM | Sitime CORP | Stock-Tech | 1.37% | +0.62% | — | |
| 10 | DOCN | Digitalocean Holdings Inc | Stock-Tech | 1.37% | +0.67% | +0.88% | |
| 11 | NVMI | Nova Ltd. | Stock-Other | 1.36% | -0.55% | — | |
| 12 | FTDR | Frontdoor Inc | Stock-Consumer Disc | 1.29% | +0.03% | — | |
| 13 | BTSG | Brightspring Health Services | Stock-Other | 1.24% | +0.25% | — | |
| 14 | MTSI | Macom Technology Solutions H | Stock-Tech | 1.12% | -0.01% | +0.66% | |
| 15 | VCYT | Veracyte Inc | Stock-Other | 1.12% | +0.27% | +0.70% | |
| 16 | MRCY | Mercury Systems Inc | Stock-Industrials | 1.11% | +0.15% | +3.90% | |
| 17 | FLS | Flowserve CORP | Stock-Industrials | 1.04% | -0.94% | EXIT | |
| 18 | LTH | Life Time Group Holdings Inc | Stock-Other | 1.03% | +0.08% | +22.26% | |
| 19 | WAY | Waystar Holding CORP | Stock-Other | 1.01% | -0.16% | +0.48% | |
| 20 | RSI | Rush Street Interactive Inc | Stock-Other | 1.00% | +0.08% | +18.48% | |
| 21 | CLH | Clean Harbors Inc | Stock-Industrials | 1.00% | -0.27% | +0.09% | |
| 22 | CRS | Carpenter Technology | Stock-Industrials | 0.95% | +0.09% | — | |
| 23 | TPC | Tutor Perini CORP | Stock-Other | 0.95% | -0.35% | +2.49% | |
| 24 | OSIS | Osi Systems Inc | Stock-Tech | 0.95% | -0.36% | — | |
| 25 | WGS | Genedx Holdings CORP | Stock-Other | 0.95% | -0.50% | EXIT | |
| 26 | PEGA | Pegasystems Inc | Stock-Tech | 0.93% | -0.57% | EXIT | |
| 27 | FRSH | Freshworks Inc-cl A | Stock-Other | 0.92% | — | -0.24% | |
| 28 | BROS | Dutch Bros Inc-class A | Stock-Consumer Disc | 0.91% | +0.07% | — | |
| 29 | G | Genpact Limited | Stock-Tech | 0.89% | -0.67% | EXIT | |
| 30 | QTWO | Q2 Holdings Inc | Stock-Tech | 0.89% | -0.14% | +15.26% | |
| 31 | IMAX | Imax CORP | Stock-Other | 0.88% | -0.38% | +12.54% | |
| 32 | AMSC | American Superconductor CORP | Stock-Other | 0.88% | — | +25.57% | |
| 33 | ICUI | Icu Medical Inc | Stock-Other | 0.88% | -0.06% | +12.68% | |
| 34 | MMSI | Merit Medical Systems Inc | Stock-Healthcare | 0.87% | -0.18% | +15.84% | |
| 35 | GMED | Globus Medical Inc - A | Stock-Healthcare | 0.86% | -0.16% | — | |
| 36 | ACA | Arcosa Inc | Stock-Industrials | 0.86% | +0.05% | — | |
| 37 | ARQT | Arcutis Biotherapeutics Inc | Stock-Other | 0.86% | -0.21% | — | |
| 38 | CAMT | Camtek Ltd. | Stock-Other | 0.85% | -0.15% | +2.48% | |
| 39 | LSCC | Lattice Semiconductor CORP | Stock-Tech | 0.85% | +0.21% | +14.19% | |
| 40 | AIR | Aar CORP | Stock-Industrials | 0.83% | -0.06% | +15.31% | |
| 41 | ECG | Everus Construction Group | Stock-Industrials | 0.81% | -0.01% | — | |
| 42 | SIMO | Silicon Motion Technol-adr | Stock-Other | 0.80% | +1.24% | +2.47% | |
| 43 | URBN | Urban Outfitters Inc | Stock-Consumer Disc | 0.79% | -0.13% | +22.24% | |
| 44 | AEO | American Eagle Outfitters | Stock-Consumer Disc | 0.79% | -0.52% | EXIT | |
| 45 | IRTC | Irhythm Holdings Inc | Stock-Healthcare | 0.78% | -0.04% | +47.41% | |
| 46 | ATEC | Alphatec Holdings Inc | Stock-Other | 0.77% | -0.61% | EXIT | |
| 47 | NYT | New York Times Co-a | Stock-Comm Services | 0.77% | -0.12% | +20.12% | |
| 48 | FCFS | Firstcash Holdings Inc | Stock-Financials | 0.77% | -0.18% | +34.25% | |
| 49 | LEVI | Levi Strauss & Co- Class A | Stock-Other | 0.75% | +0.06% | +10.01% | |
| 50 | PRIM | Primoris Services CORP | Stock-Industrials | 0.74% | -0.70% | EXIT |
| # | Ticker | Issuer | Weight Change | Shares Change | Action |
|---|---|---|---|---|---|
| 1 | LITE | Lumentum Holdings Inc | +1.7% | -14.51% | Trim |
| 2 | AAOI | Applied Optoelectronics Inc | +0.7% | +8.03% | Add |
| 3 | ATEC | Alphatec Holdings Inc | +0.5% | +116.95% | Add |
| 4 | AEO | American Eagle Outfitters | +0.5% | +68.29% | Add |
| 5 | DOCN | Digitalocean Holdings Inc | +0.4% | +0.88% | Add |
| 6 | MTSI | Macom Technology Solutions H | +0.3% | +0.66% | Add |
| 7 | IRTC | Irhythm Holdings Inc | +0.3% | +47.41% | Add |
| 8 | SN | SharkNinja, Inc. | +0.2% | +9.01% | Add |
| 9 | NYT | New York Times Co-a | +0.2% | +20.12% | Add |
| 10 | BTSG | Brightspring Health Services | +0.2% | — | Unchanged |
| 11 | FLS | Flowserve CORP | +0.2% | +0.16% | Add |
| 12 | ICUI | Icu Medical Inc | +0.2% | +12.68% | Add |
| 13 | LASR | Nlight Inc | +0.2% | +33.98% | Add |
| 14 | FCFS | Firstcash Holdings Inc | +0.2% | +34.25% | Add |
| 15 | AXGN | Axogen Inc | +0.2% | +2.47% | Add |
| 16 | VCYT | Veracyte Inc | +0.2% | +0.70% | Add |
| 17 | CRS | Carpenter Technology | +0.2% | — | Unchanged |
| 18 | VISN | Vistance Networks Inc | +0.2% | +21.49% | Add |
| 19 | SXT | Sensient Technologies CORP | +0.2% | +40.09% | Add |
| 20 | GENI | Genius Sports Limited | +0.2% | +56.23% | Add |
| 21 | IMAX | Imax CORP | +0.2% | +12.54% | Add |
| 22 | WGS | Genedx Holdings CORP | +0.2% | +2.50% | Add |
| 23 | URBN | Urban Outfitters Inc | +0.2% | +22.24% | Add |
| 24 | SITM | Sitime CORP | +0.1% | — | Unchanged |
| 25 | LQDA | Liquidia CORP | +0.1% | +2.49% | Add |
| 26 | CECO | Ceco Environmental CORP | +0.1% | +58.15% | Add |
| 27 | SKYW | Skywest Inc | +0.1% | +15.55% | Add |
| 28 | MMSI | Merit Medical Systems Inc | +0.1% | +15.84% | Add |
| 29 | DAVE | Dave Inc | +0.1% | +29.15% | Add |
| 30 | LTH | Life Time Group Holdings Inc | +0.1% | +22.26% | Add |
| 31 | LIVN | LivaNova PLC | +0.1% | +14.14% | Add |
| 32 | ATRC | Atricure Inc | +0.1% | +42.01% | Add |
| 33 | ETON | Eton Pharmaceuticals Inc | +0.1% | +124.22% | Add |
| 34 | BROS | Dutch Bros Inc-class A | +0.1% | — | Unchanged |
| 35 | CPRX | Catalyst Pharmaceuticals Inc | +0.1% | +11.05% | Add |
| 36 | QLYS | Qualys Inc | +0.1% | +28.33% | Add |
| 37 | MD | Pediatrix Medical Group Inc | +0.1% | +2.64% | Add |
| 38 | QTWO | Q2 Holdings Inc | +0.1% | +15.26% | Add |
| 39 | LSCC | Lattice Semiconductor CORP | +0.1% | +14.19% | Add |
| 40 | EYE | National Vision Holdings Inc | +0.1% | +31.87% | Add |
| 41 | COCO | Vita Coco Co Inc/the | +0.1% | +2.23% | Add |
| 42 | BOOT | Boot Barn Holdings Inc | +0.1% | +27.79% | Add |
| 43 | RSI | Rush Street Interactive Inc | +0.1% | +18.48% | Add |
| 44 | PEGA | Pegasystems Inc | +0.1% | +9.10% | Add |
| 45 | BBW | Build-a-bear Workshop Inc | +0.1% | +46.40% | Add |
| 46 | ACA | Arcosa Inc | +0.1% | — | Unchanged |
| 47 | G | Genpact Limited | +0.1% | +0.93% | Add |
| 48 | SEI | Solaris Energy Infrastructur | +0.1% | — | Unchanged |
| 49 | ANIP | Ani Pharmaceuticals Inc | +0.1% | +35.95% | Add |
| 50 | FBK | Fb Financial CORP | +0.1% | +28.91% | Add |
According to official SEC Form 13F filings, Oberweis Asset Management Inc/ reported a total U.S. public equity portfolio value of $4.8B across 179 disclosed positions in Q4 2025.
Expert Analysis & Guides for Tracking Wall Street Smart Money Movements
Learn how SEC Form 13F filings work, the $100M threshold, 45-day reporting lag, and how to track top hedge fund holdings.
In terms of portfolio concentration, the top 5 core holdings (including LITE, CRDO, AAOI) accounted for 7.7% of total reported equity market value during Q4 2025.
Top New Position Initiated
GMED
市值: $23.6M
Top Position Liquidated / Trimmed
ADMA
前期市值: $39.8M
During Q4 2025, Oberweis Asset Management Inc/'s top holdings by market value included LITE (3.8%)、CRDO (3.5%)、AAOI (2.6%). The largest single position, LITE, represented 3.8% of total portfolio value.
In Q4 2025, Oberweis Asset Management Inc/ made 167 total portfolio adjustments, initiating 21 new buys, adding to 103 positions, trimming 18 holdings, and fully liquidating 25 stocks.
All holding records on this page are fetched directly from the U.S. Securities and Exchange Commission (SEC) EDGAR system (Form 13F-HR). AlphaSMO parses CUSIP identifiers and formats data into Schema.org-compliant datasets.
Understand SEC Form 4 insider disclosures for corporate officers, directors, and 10% owners to track executive transactions.
Understand Rule 144 restricted stock sale notices to spot planned insider liquidations before market sell pressure arrives.
Explore the 5% beneficial ownership threshold, 13D vs 13G filing differences, and recent SEC accelerated deadline rules.
Best practices for analyzing 13F quarterly changes without getting misled by stock splits, options, or market valuation drift.
Learn how AlphaSMO's flagship signal detects high-conviction stocks where 13F hedge funds and corporate insiders buy at the same time.