What Oberweis Asset Management does

Oberweis Asset Management, Inc. is a privately held, independent investment management firm founded in 1989 and headquartered in Lisle, Illinois (suburban Chicago), with additional equity research offices in New York, London, and Hong Kong. The firm manages approximately $8.36 billion in assets (as of 6/30/2026) across six mutual funds and six corresponding separately managed account (SMA) strategies, focusing on global small- to mid-cap equities through an investment philosophy grounded in the academically documented Post-Earnings Announcement Drift behavioral finance phenomenon. The wholly-owned subsidiaries include Oberweis Securities, Inc. (a FINRA/SIPC-registered broker-dealer that distributes the Oberweis Funds) and Oberweis Asset Management (Asia) Ltd. (supporting China/Asia mandates).

The firm operates two distinct distribution channels. The retail channel distributes no-load mutual funds directly and through Fidelity, Charles Schwab, and TD Ameritrade, with investor-class minimums of $1,000 and institutional-class minimums of $1 million; expense ratios range from 0.81% (Focused International Growth Institutional) to 1.80% (China Opportunities Investor). The institutional channel sells SMAs to pension plans, profit sharing plans, trusts, charitable organizations, and corporations, with a $25 million minimum and direct sales coverage by a dedicated institutional marketing and client service team.

Revenue is generated through management fees calculated as a percentage of AUM under a subscription/recurring model. The firm is controlled by the founding Oberweis family (with James W. Oberweis as President and CIO), has no external PE/VC ownership, and operates as a signatory to the UN Principles of Responsible Investing. The product set spans U.S. small-cap/micro-cap (Micro-Cap Fund, Small-Cap Opportunities Fund), international (International Opportunities, International Select, Focused International Growth), Greater China (China Opportunities Fund), and global (Global Opportunities Fund) strategies.

Name

Oberweis Asset Management

Legal name

Oberweis Asset Management, Inc.

Website

https://oberweisfunds.com

Company type

Private

Founded year

1989

Operating status

Operating

Headcount range

11–50 employees

Short description

Oberweis Asset Management is a privately held, independent investment management firm founded in 1989 that manages approximately $8.36 billion in global small- to mid-cap equity strategies for institutional and individual investors through mutual funds and separately managed accounts, applying a proprietary Post-Earnings Announcement Drift-based investment process.

Ownership category

akta.pro rank

Product category

Active Equity Asset Management

NAICS

Portfolio Management and Investment Advice (523940), Open-End Investment Funds (525910)

SIC

Investment Advice (6282)

akta.pro primary industry

Institutional Separate Accounts & SMAs (Mandates) (FSAAAGAL)

akta.pro secondary industries

Fee-Based Advisory (FSAEAAAM), Advisory Portfolio Management (Non-Discretionary) (FSAAABAD)

Keywords

• Active small-cap equity management
• Micro-cap mutual funds
• Separately managed accounts
• International equity strategies
• Institutional asset management

Headquarters

HQ city

Lisle

HQ country

United States

HQ region

North America

Offices5 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Marketing or Sales, Technology or R&D, Infrastructure

Revenue model

1. Investment Management Fees: Generates revenue through management fees charged on assets under management across its mutual fund family and separately managed accounts. Fees are calculated as a percentage of AUM and vary by fund class (investor vs institutional) and strategy.

Pricing tiers

Go-to-market motion1 record

Distribution channels5 records

Marketing channels3 records

Core offering

Oberweis Asset Management is an independent investment management firm that actively manages micro-, small-, and mid-cap equity portfolios on behalf of institutional and individual investors. It sells a proprietary family of six no-load mutual funds and offers the same strategies as separately managed accounts (SMAs) to institutional clients with a $25 million minimum. Revenue is generated through management fees calculated as a percentage of assets under management, varying by fund class (investor vs. institutional) and strategy.

Product overview

Oberweis Asset Management is an independent investment management firm offering a proprietary mutual fund family and separately managed accounts (SMAs). The product suite includes six mutual funds across investor and institutional share classes: Global Opportunities Fund, Micro-Cap Fund, Small-Cap Opportunities Fund, China Opportunities Fund, International Opportunities Fund, and Focused International Growth Fund. These funds are supplemented by six separately managed account strategies providing institutional investors access to the same investment approaches (Micro-Cap Growth, Small-Cap Opportunities, China Opportunities, International Opportunities, International Select, and Global Opportunities). The funds are distributed directly and through third-party platforms including Fidelity, Charles Schwab, and TD Ameritrade.

Differentiator

Problem solved

Functional benefit

Brands

• Global Opportunities Fund: Global small-cap equity fund investing in U.S. and international markets with market cap under $1.5 billion.
• Micro-Cap Growth Strategy
• Small-Cap Opportunities Strategy
• China Opportunities Strategy
• International Opportunities Strategy
• International Select Strategy
• Focused International Growth Fund

Products and services

• Global Opportunities Fund (OBEGX / OBGIX) No-load mutual fund seeking capital appreciation through investment in small-cap growth companies globally, investing in both U.S. and non-U.S. companies with market capitalizations under $1.5 billion; offered in Investor Class (OBEGX) and Institutional Class (OBGIX).
• Micro-Cap Fund (OBMCX / OMCIX) No-load mutual fund seeking capital appreciation through investment in micro-cap growth companies with market capitalizations within the range of the Russell Microcap Growth Index; offered in Investor Class (OBMCX) and Institutional Class (OMCIX).
• Small-Cap Opportunities Fund (OBSOX / OBSIX) No-load mutual fund seeking capital appreciation through investment in small-cap growth companies with market capitalizations within the range of the Russell 2000 Growth Index; offered in Investor Class (OBSOX) and Institutional Class (OBSIX).
• China Opportunities Fund (OBCHX / OCHIX) No-load mutual fund seeking capital appreciation through investment in companies poised to benefit from growth in Greater China, investing in China A-shares, H-shares, and ADRs across the market capitalization spectrum; offered in Investor Class (OBCHX) and Institutional Class (OCHIX).
• International Opportunities Fund (OBIOX / OBIIX) No-load mutual fund seeking capital appreciation through investment in non-U.S.-based companies, focusing on smaller companies in Europe, UK, Canada, Asia, Japan, and Latin America; offered in Investor Class (OBIOX) and Institutional Class (OBIIX).
• Focused International Growth Fund (OFIGX) No-load mutual fund (Institutional Class OFIGX, $100,000 minimum) seeking to maximize long-term capital appreciation through investment in securities of non-U.S. companies with above-average long-term growth potential.
• Micro-Cap Growth Separately Managed Account Strategy Separately managed account strategy that seeks a total return exceeding the Russell Microcap Growth Index over a full market cycle, investing in very small companies with market capitalizations under $600 million; available to institutional clients with a $25 million minimum.
• Small-Cap Opportunities Separately Managed Account Strategy Separately managed account strategy that seeks a total return exceeding the Russell 2000 Growth Index over a full market cycle, investing in smaller companies within the Russell 2000 range; available to institutional clients with a $25 million minimum.
• China Opportunities Separately Managed Account Strategy Separately managed account strategy that seeks a total return exceeding the MSCI China Index over a full market cycle, investing across the market capitalization spectrum in China A-shares, H-shares, and ADRs; available to institutional clients with a $25 million minimum.
• International Opportunities Separately Managed Account Strategy Separately managed account strategy that seeks a total return exceeding the MSCI World ex USA Small Cap Growth Index over a full market cycle, focusing on smaller non-U.S. companies in developed and emerging markets; available to institutional clients with a $25 million minimum.
• International Select Separately Managed Account Strategy Separately managed account strategy that seeks a total return exceeding the MSCI EAFE Index over a full market cycle, structured as a concentrated high-conviction portfolio of 25–40 positions in companies with market capitalizations greater than $5 billion; available to institutional clients with a $25 million minimum.
• Global Opportunities Separately Managed Account Strategy Separately managed account strategy that seeks a total return exceeding the MSCI ACWI Small-Cap Index over a full market cycle, investing in small-cap companies worldwide with market capitalizations under $1.5 billion; available to institutional clients with a $25 million minimum.

Quantifiable outcome

• Micro-Cap Fund 1-year return of 78.14% (Investor Class) vs benchmark
• +2 more outcomes

Segments3 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Partnerships

Six partnerships are on record, tiered core and minor.

• Fidelity InvestmentscoreChannel Partner/ Reseller/ DistributorFidelity Investments serves as a distribution platform for Oberweis mutual funds, providing individual investors access to Oberweis funds through its brokerage platform.
• Charles Schwab & Co.coreChannel Partner/ Reseller/ DistributorCharles Schwab & Co. provides distribution services for Oberweis mutual funds, offering individual investors access through its Schwab platform.
• TD AmeritradecoreChannel Partner/ Reseller/ DistributorTD Ameritrade distributes Oberweis mutual funds to individual investors through its investment platform.
• UMB Fund Services, Inc.coreImplementation/ SI/ Consulting PartnerUMB Fund Services provides fund administration services including transfer agent, fund accounting, and custody services for Oberweis Funds.
• Oberweis Securities, Inc.coreChannel Partner/ Reseller/ DistributorOberweis Securities, Inc. is the registered broker-dealer and distributor of The Oberweis Funds, member FINRA and SIPC.
• UN Principles of Responsible Investing (UNPRI)minorStrategic or Co-development PartnerOberweis is a signatory to the UN Principles of Responsible Investing, demonstrating commitment to ESG integration in investment processes.

Scale indicators8 records

Recent moves6 records

Expansion highlights6 records

Direct peers

• Brown Capital Management: Baltimore-based small-cap growth specialist with mutual fund and SMA offerings. Comparable concentrated, bottom-up growth style and institutional/retail distribution architecture.
• Ariel Investments: Independent, employee-owned boutique running small- and mid-cap mutual fund strategies. Comparable structure (private, founder-led) and target investor base to Oberweis.
• Harding Loevner: International and global equity specialist managing pooled funds and SMAs. Directly comparable to Oberweis's International Opportunities, International Select, and Global Opportunities strategies.
• Royce Investment Partners: Long-standing small-cap specialist (formerly Royce & Associates) running mutual funds focused on US small- and micro-cap equities. Directly comparable to Oberweis's Micro-Cap and Small-Cap Opportunities strategies in mandate, distribution (third-party platforms), and boutique positioning.
• Wasatch Advisors: Salt Lake City-based active small-cap growth manager with mutual fund and SMA products for institutional and retail investors. Closely comparable investment universe and behavioral-finance-tilted process.
• Driehaus Capital Management: Chicago-based boutique explicitly applying behavioral finance to small- and mid-cap growth investing globally. Highly comparable philosophy and product set to Oberweis's PEAD-anchored process.
• Matthews Asia: Asia-focused equity specialist with a broad fund lineup including China strategies. Directly comparable to Oberweis's China Opportunities Fund in mandate and distribution approach.

Broad incumbents

• Artisan Partners: Multi-boutique public asset manager with global small-cap growth product offerings. Comparable small/mid-cap growth capabilities but at significantly greater AUM scale and with broader portfolio breadth.
• Lord Abbett: Large, established active asset manager with small- and mid-cap growth and value funds. Broader incumbent with overlapping small/mid-cap capabilities but covering many other asset classes.
• T. Rowe Price: Public global asset manager with active small-cap growth product lines (e.g., T. Rowe Price New Horizons). Larger-scale incumbent offering comparable small-cap mandates as part of a much broader product set.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat3 records

Key risks6 records

Key highlights6 records

Customer concentration

• LinkedInlinkedin.com/company/oberweis-asset-management

Revenue estimate

Valuation estimate

Number of profiles

Profiles17 records

Subsidiaries2 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Oberweis Asset Management