# EDGAR Filing Document

**Accession Number:** 0000811030
**File Stem:** 0000894189-25-004855
**Filing Date:** 2025-6
**Character Count:** 24174
**Document Hash:** 7947f1b80e451409916d8b262b3319e4
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0000894189-25-004855.hdr.sgml**: 20250630

**ACCESSION NUMBER**: 0000894189-25-004855

**CONFORMED SUBMISSION TYPE**: 497K

**PUBLIC DOCUMENT COUNT**: 3

**FILED AS OF DATE**: 20250630

**DATE AS OF CHANGE**: 20250630

**EFFECTIVENESS DATE**: 20250630

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** PROFESSIONALLY MANAGED PORTFOLIOS
- **CENTRAL INDEX KEY:** 0000811030

**ORGANIZATION NAME:**
- **EIN:** 566415270
- **STATE OF INCORPORATION:** MA
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 497K
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 033-12213
- **FILM NUMBER:** 251091990

**BUSINESS ADDRESS:**
- **STREET 1:** 615 EAST MICHIGAN STREET
- **CITY:** MILWAUKEE
- **STATE:** WI
- **ZIP:** 53202
- **BUSINESS PHONE:** 414-218-3770

**MAIL ADDRESS:**
- **STREET 1:** 615 EAST MICHIGAN STREET
- **CITY:** MILWAUKEE
- **STATE:** WI
- **ZIP:** 53202

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** AVONDALE INVESTMENT TRUST
- **DATE OF NAME CHANGE:** 19910529

## Series and Classes Contracts Data

### Osterweis Fund (Series ID: S000004931)

| Class ID   | Class Name     | Ticker Symbol   |
|:---|:---|:---|
| C000013346 | Investor Class | OSTFX           |

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| | |
|:---|:---|
| ![ostlogoweba.jpg](ostlogoweba.jpg) | Osterweis Fund<br>(OSTFX)<br>Summary Prospectus \| June 30, 2025  |

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Before you invest, you may want to review the Fund's Prospectus, which contains more information about the Fund and its risks. You can find the Fund's Prospectus, Statement of Additional Information, Reports to Shareholders and other information about the Fund online at www.osterweis.com/prospectus. You may also obtain this information at no cost by calling (866) 236-0050 or by e-mail at marketing@osterweis.com. The Fund's Prospectus and Statement of Additional Information, both dated June 30, 2025 are incorporated by reference into this Summary Prospectus.

**OSTERWEIS FUND** 

**Investment Objective** 

The Osterweis Fund (the "Fund") seeks long-term total returns.

**Fees and Expenses of the Fund** 

This table describes the fees and expenses that you may pay if you buy, hold and sell shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the table and example below.

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| | |
|:---|:---|
| &nbsp;&nbsp;**Shareholder Fees**<br>*(fees paid directly from your investment)* |  |
| &nbsp;&nbsp;**Annual Fund Operating Expenses**<br>*(expenses that you pay each year as a percentage of the value of your investment)* |  |
| &nbsp;&nbsp;Management Fees | 0.75% |
| &nbsp;&nbsp;Distribution and Service (12b-1) Fees |  |
| &nbsp;&nbsp;Other Expenses<sup>(1)</sup> | 0.20% |
| &nbsp;&nbsp;Acquired Fund Fees and Expenses<sup>(2)</sup> | 0.01% |
| &nbsp;&nbsp;Total Annual Fund Operating Expenses<sup>(3)</sup> | 0.96% |

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<sup>(1)&nbsp;&nbsp;&nbsp;&nbsp;</sup>"Other Expenses" include expenses incurred by the Fund in the normal course of its operations together with recoupment of management fees previously waived or reimbursed to the Fund. Such expenses are borne by the Fund separately from the management fees paid to Osterweis Capital Management, Inc. (the "Adviser").

<sup>(2)&nbsp;&nbsp;&nbsp;&nbsp;</sup>Acquired Fund Fees and Expenses ("AFFE") are indirect fees and expenses that the Fund incurs from investing in the shares of other investment companies, including money market funds and other mutual funds, closed end funds, business development companies or certain exchange-traded funds. The Total Annual Fund Operating Expenses do not correlate to the Ratio of Expenses to Average Net Assets provided in the Financial Highlights section of the statutory Prospectus, which reflects the operating expenses of the Fund and does not include Acquired Fund Fees and Expenses.

<sup>(3)&nbsp;&nbsp;&nbsp;&nbsp;</sup> The Adviser has contractually agreed to reduce its fees and/or pay Fund expenses (excluding any front-end or contingent deferred loads, taxes, interest expenses, brokerage commissions, acquired fund fees and expenses, expenses incurred in connection with any merger or reorganization, extraordinary expenses such as litigation, or any class-specific expenses such as Rule 12b-1 fees or shareholder servicing plan fees) in order to limit Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement for the Fund to 0.95% of the Fund's average net assets (the "Expense Cap"). The Expense Cap will remain in effect until at least June 30, 2026, except that the Agreement may be terminated at any time by the Board of Trustees upon 60 days' written notice

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to the Adviser, or by the Adviser with consent of the Board. The Adviser is permitted, with Board approval, to be reimbursed for fee reductions and/or expense payments made in the prior three years from the date the fees were waived and/or expenses were paid. This reimbursement may be requested if the aggregate amount actually paid by the Fund toward operating expenses for such period (taking into account any reimbursement) does not exceed the lesser of the Expense Cap in place at the time of waiver or at the time of reimbursement.

**Example** 

This Example is intended to help you compare the costs of investing in the Fund with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Fund's operating expenses remain the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

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| | | | |
|:---|:---|:---|:---|
| **1 Year:** $98 | **3 Years:** $293 | **5 Years:** $504 | **10 Years:** $1,113 |

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**Portfolio Turnover** 

The Fund pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the Fund's performance. During the most recent fiscal year ended March 31, 2025, the Fund's portfolio turnover rate was 42% of the average value of its portfolio.

**Principal Investment Strategies** 

The Fund invests primarily in common stocks of quality growth companies that Osterweis Capital Management, Inc. (the "Adviser") believes offer superior investment value and opportunity for growth. The Fund may invest in companies of any size – large, medium and small. The Adviser focuses on quality growth companies that it believes to be undervalued or otherwise out-of-favor in the market, but that have durable competitive advantages. The team focuses on a select group of companies that it believes have such advantages, attractive growth prospects, and strong management teams. As such companies achieve greater visibility over time and their stocks are accorded valuations more in line with their growth rates, the Adviser may choose to sell those stocks.

Other types of equity securities in which the Fund may invest include convertible securities and publicly traded Master Limited Partnerships ("MLPs"). MLPs are generally energy or natural resource-related companies and may comprise up to 15% of the Fund's assets. The Fund may also invest up to 30% of its assets in equity securities of foreign issuers and/or depositary receipts that are traded on domestic or foreign exchanges, including those in emerging markets. The Fund's investments in any one sector may exceed 25% of its net assets. As of March 31, 2025, over 25% of the Fund's assets were invested in securities within the information technology sector.

In addition to taking temporary defensive positions in cash and short-term bonds from time to time, the Fund may invest up to 50% of its assets in fixed income securities, which include, but are not limited to, U.S. government and agency debt, investment grade corporate debt and convertible debt. Up to 40% of the Fund's assets may be invested in below investment grade corporate debt (higher-risk, lower-rated fixed income securities such as those rated lower than BBB- by S&P or lower than Baa3 by Moody's), although the Fund does not expect to maintain significant positions in such securities on a normal basis.

**Principal Investment Risks** 

There is the risk that you could lose all or a portion of your investment in the Fund. The following risks are considered principal to the Fund and could affect the value of your investment in the Fund:

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&nbsp;&nbsp;&nbsp;&nbsp;• Equity Risk: Common stocks are susceptible to general stock market fluctuations and to volatile increases and decreases in value. These fluctuations may cause a security to be worth less than its cost when originally purchased or less than it was worth at an earlier time.

&nbsp;&nbsp;&nbsp;&nbsp;• Large Company Risk: Larger, more established companies may be unable to respond quickly to new competitive challenges like changes in consumer tastes or innovative smaller competitors. Also, large-cap companies are sometimes unable to attain the high growth rates of successful, smaller companies, especially during extended periods of economic expansion.

&nbsp;&nbsp;&nbsp;&nbsp;• Small and Medium Company Risk: Investing in securities of small- and medium-sized companies, even indirectly, may involve greater volatility than investing in larger and more established companies.

&nbsp;&nbsp;&nbsp;&nbsp;• Economic and Market Risk: Economies and financial markets throughout the world are becoming increasingly interconnected, which increases the likelihood that events or conditions in one country or region will adversely impact markets or issuers in other countries or regions. Securities in the Fund's portfolio may underperform in comparison to securities in the general financial markets, a particular financial market, or other asset classes, due to a number of factors, including inflation (or expectations for inflation), deflation (or expectations for deflation), interest rates, global demand for particular products or resources, market instability, financial system instability, debt crises and downgrades, embargoes, tariffs, sanctions and other trade barriers, regulatory events, other governmental trade or market control programs, and related geopolitical events. In addition, the value of the Fund's investments may be negatively affected by the occurrence of global events such as war, terrorism, environmental disasters, natural disasters or events, country instability, and infectious disease epidemics or pandemics. The imposition by the U.S. of tariffs on goods imported from foreign countries and reciprocal tariffs levied on U.S. goods by those countries also may lead to volatility and instability in domestic and foreign markets.

&nbsp;&nbsp;&nbsp;&nbsp;• Management Risk: The risk that the Adviser may fail to implement the Fund's investment strategies and meet its investment objective.

The remaining principal risks are presented in alphabetical order. Each risk summarized below is considered a "principal risk" of investing in the Fund, regardless of the order in which it appears.

&nbsp;&nbsp;&nbsp;&nbsp;• Below Investment Grade Securities Risk: Investing in fixed income securities that are rated below investment grade involves risks such as increased possibility of default, decreased liquidity of the security and changes in value based on public perception of the issuer.

&nbsp;&nbsp;&nbsp;&nbsp;• Convertible Security Risk: As with a straight debt security, a convertible security tends to increase in market value when interest rates decline and decrease in value when interest rates rise. Like a common stock, the value of a convertible security also tends to increase as the market value of the underlying stock rises, and it tends to decrease as the market value of the underlying stock declines.

&nbsp;&nbsp;&nbsp;&nbsp;• Currency Risk: Fluctuations in currency exchange rates may adversely affect the value of the Fund's investments in foreign securities as well as the value of the Fund's investments in domestic securities whose issuers earn at least a portion of their revenue in foreign currency.

&nbsp;&nbsp;&nbsp;&nbsp;• Debt Securities Risks:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;◦ Credit Risk: The risk that an issuer of a fixed income security will fail to make interest payments or repay principal when due, in whole or in part. Changes in an issuer's financial strength, the market's perception of an issuer's creditworthiness, or in a security's credit rating may affect a security's value. In addition, investments in sovereign debt involves a heightened risk that the issuer responsible for repayment of the debt may be unable or unwilling to pay interest and repay principal when due, and the Fund may lack recourse against the issuer in the event of default. Investments in sovereign debt are also subject to the risk that the issuer will default independently of its sovereign. Below investment grade securities have speculative characteristics, and changes in economic conditions or other circumstances are more likely to impair the

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ability of issuers of those securities to make principal and interest payments than is the case with issuers of investment grade securities.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;◦ Defaulted Securities Risk: The risk of the uncertainty of repayment of defaulted securities (*e.g.,* a security on which a principal or interest payment is not made when due) and obligations of distressed issuers.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;◦ Extension Risk: The risk that if interest rates rise, repayments of principal on certain debt securities, including, but not limited to, floating rate loans and mortgage-related securities, may occur at a slower rate than expected and the expected maturity of those securities could lengthen as a result. Securities that are subject to extension risk generally have a greater potential for loss when prevailing interest rates rise, which could cause their values to fall sharply.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;◦ Interest Rate Risk: The risk that debt instruments will change in value because of changes in interest rates. The value of an instrument with a longer duration (whether positive or negative) will be more sensitive to changes in interest rates than a similar instrument with a shorter duration. Bonds and other debt instruments typically have a positive duration. The value of a debt instrument with positive duration will generally decline if interest rates increase. Certain other investments, such as interest-only securities and certain derivative instruments, may have a negative duration. The value of instruments with a negative duration will generally decline if interest rates decrease. Inverse floaters, interest-only and principal-only securities are especially sensitive to interest rate changes, which can affect not only their prices but can also change the income flows and repayment assumptions about those investments.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;◦ Prepayment Risk: The risk that the issuer of a debt security, including floating rate loans and mortgage-related securities, repays all or a portion of the principal prior to the security's maturity. In times of declining interest rates, there is a greater likelihood that the Fund's higher yielding securities will be pre-paid with the Fund being unable to reinvest the proceeds in an investment with as great a yield. Prepayments can therefore result in lower yields to shareholders of the Fund.

&nbsp;&nbsp;&nbsp;&nbsp;• Foreign Securities: Investing in foreign securities, including depositary receipts, may involve increased risks due to political, social and economic developments abroad, and differences between United States and foreign regulatory practices. Given the global interrelationships of today's economy, volatility or threats to stability of any significant currency, such as occurred in the recent past with the European Monetary Union, or significant political instability, may affect other markets and affect the risk of an investment in the Fund.

&nbsp;&nbsp;&nbsp;&nbsp;• Emerging Markets Risk: Emerging markets may involve greater risk and volatility than more developed markets. Some emerging markets countries may have fixed or managed currencies that are not free-floating against the U.S. dollar. Certain of these currencies have experienced, and may experience in the future, substantial fluctuations or a steady devaluation relative to the U.S. dollar.

&nbsp;&nbsp;&nbsp;&nbsp;• Liquidity Risk: Securities purchased by the Fund may become illiquid particularly during periods of market turbulence. Illiquid investments may be more difficult to trade and value than liquid ones and, if the Fund is forced to sell these investments promptly to meet redemption requests or for other needs, the Fund may incur a loss.

&nbsp;&nbsp;&nbsp;&nbsp;• Master Limited Partnership Risk: Investments held by an MLP may be relatively illiquid, limiting the MLP's ability to vary its portfolio promptly in response to changes in economic or other conditions. In addition, MLPs may have limited financial resources, their securities may trade infrequently and in limited volume and they may be subject to more abrupt or erratic price movements than securities of larger or more broadly-based companies. The risks of investing in an MLP are generally those inherent in investing in a partnership as opposed to a corporation. For example, state law governing partnerships is often less restrictive than state law governing corporations. Accordingly, there may be fewer protections afforded investors in an MLP than investors in a corporation. Additional risks involved with investing in an MLP are risks associated with the specific industry or industries in which the partnership invests, such as the risks of investing in real estate or oil and gas industries.

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&nbsp;&nbsp;&nbsp;&nbsp;• Sector Emphasis Risk: The Fund, from time to time, may invest 25% or more of its assets in one or more sectors subjecting the Fund to sector emphasis risk. This is the risk that the Fund is subject to a greater risk of loss as a result of adverse economic, business or other developments affecting a specific sector the Fund has a focused position in, than if its investments were diversified across a greater number of industry sectors. Some sectors possess particular risks that may not affect other sectors.

–Information Technology Sector Risk. The information technology sector can be significantly affected by rapid obsolescence of existing technology, short product cycles, falling prices and profits, competition from new market entrants, government regulation, and general economic conditions.

**Performance** 

The following performance information provides some indication of the risks of investing in the Fund. The bar chart below illustrates how the Fund's total returns have varied from year to year for the past ten calendar years. The table below illustrates how the Fund's average annual total returns over time compare with a domestic broad-based market index. The Fund's past performance, before and after taxes, is not necessarily an indication of how the Fund will perform in the future. Updated performance is available on the Fund's website at www.osterweis.com.

**Osterweis Fund** 

**Calendar Year Total Returns as of December 31,\***![chart-78c20000bc984cf1bc5a.jpg](chart-78c20000bc984cf1bc5a.jpg)

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| | | |
|:---|:---|:---|
| **Best Quarter:** | **2Q, 2020** | **17.85%** |
| **Worst Quarter:** | **1Q, 2020** | **-16.16%** |

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\* The **Osterweis Fund's** calendar year-to-date return as of March 31, 2025 was -3.27%.

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| | | | |
|:---|:---|:---|:---|
| **Average Annual Total Returns as of December 31, 2024** | **Average Annual Total Returns as of December 31, 2024** | **Average Annual Total Returns as of December 31, 2024** | **Average Annual Total Returns as of December 31, 2024** |
| | **1 Year** | **5 Years** | **10 Years** |
| Return Before Taxes | 13.38% | 9.80% | 8.27% |
| Return After Taxes on Distributions | 9.98% | 7.78% | 4.95% |
| Return After Taxes on Distributions and Sale of Fund Shares | 10.51% | 7.59% | 5.65% |
| S&P 500<sup>®</sup> Index (reflects no deduction for fees, expenses or taxes) | 25.02% | 14.53% | 13.10% |

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The "Return After Taxes on Distributions" shows the effect of taxable distributions (dividends and capital gains distributions) but assumes that you still hold Fund shares at the end of the period. The "Return After Taxes on Distributions and Sale of Fund Shares" shows the effect of both taxable distributions and any taxable gain or loss that would be realized if a Fund's shares were sold at the end of the specified period. The "Return After Taxes on Distributions and Sale of Fund Shares" is higher than other return figures when a capital loss occurs upon the redemption of Fund shares because there is an assumed tax benefit for the investor.

After-tax returns are calculated using the highest historical individual federal marginal income tax rate and do not reflect the impact of state and local taxes. Actual after-tax returns depend on your tax situation and may differ from those shown. Furthermore, the after-tax returns shown are not relevant to those who hold their shares through tax-deferred arrangements such as 401(k) plans or Individual Retirement Accounts ("IRAs").

**Investment Adviser** 

Osterweis Capital Management, Inc.

**Portfolio Managers** 

John S. Osterweis, Chairman and Co-Chief Investment Officer, Core Equity – Lead Portfolio Manager of the Fund since 1993

Gregory S. Hermanski, Co-Chief Investment Officer – Co-Lead Portfolio Manager of the Fund since 2022

Nael Fakhry, Co-Chief Investment Officer – Co-Lead Portfolio Manager of the Fund since 2022

**Purchase and Sale of Fund Shares** 

You may purchase, exchange or redeem Fund shares on any business day by written request via mail (Osterweis Funds, c/o U.S. Bank Global Fund Services, P.O. Box 219252, Kansas City, MO 64121-9252), by wire transfer, by telephone toll-free at (866) 236-0050 or through a financial intermediary. The minimum initial and subsequent investment amounts are shown in the table below.

**Minimum Investments** 

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| | | |
|:---|:---|:---|
| **** | **To Open A <br>New Account** | **To Add to An Existing Account** |
| Regular Accounts | $5000 | $100 |
| Automatic Investment Plan | $5000 | $100 |
| Retirement, Tax-Deferred and UGMA/UTMA Accounts | $1500 | $100 |

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**Tax Information** 

The Fund's distributions are taxed as ordinary income or capital gains, unless you are investing through a tax-deferred arrangement, such as a 401(k) plan or an IRA. Distributions on investments made through tax-deferred arrangements may be taxed later upon withdrawal of assets from those accounts.

**Payments to Broker-Dealers and Other Financial Intermediaries** 

If you purchase shares of the Fund through a broker-dealer or other financial intermediary, the Fund and its related companies may pay the intermediary for the sale of Fund shares and related services. These payments may create a conflict of interest by influencing the broker-dealer or other intermediary and your salesperson to recommend the Fund over another investment. Ask your salesperson or visit your financial intermediary's website for more information.

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