# EDGAR Filing Document

**Accession Number:** 0001318342
**File Stem:** 0001213900-26-039075
**Filing Date:** 2026-4
**Character Count:** 24027
**Document Hash:** 34092166c10c0122ff3557b6fa5f97ca
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001213900-26-039075.hdr.sgml**: 20260402

**ACCESSION NUMBER**: 0001213900-26-039075

**CONFORMED SUBMISSION TYPE**: 497K

**PUBLIC DOCUMENT COUNT**: 3

**FILED AS OF DATE**: 20260402

**DATE AS OF CHANGE**: 20260402

**EFFECTIVENESS DATE**: 20260402

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Investment Managers Series Trust
- **CENTRAL INDEX KEY:** 0001318342

**ORGANIZATION NAME:**
- **EIN:** 000000000
- **STATE OF INCORPORATION:** DE

**FILING VALUES:**
- **FORM TYPE:** 497K
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 333-122901
- **FILM NUMBER:** 26831816

**BUSINESS ADDRESS:**
- **STREET 1:** 235 WEST GALENA STREET
- **CITY:** MILWAUKEE
- **STATE:** WI
- **ZIP:** 53212
- **BUSINESS PHONE:** 626-914-4141

**MAIL ADDRESS:**
- **STREET 1:** 235 WEST GALENA STREET
- **CITY:** MILWAUKEE
- **STATE:** WI
- **ZIP:** 53212

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** Claymore Trust
- **DATE OF NAME CHANGE:** 20050603

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** Claymore Equity Trust
- **DATE OF NAME CHANGE:** 20050218

## Series and Classes Contracts Data

### Riverbridge Growth Fund (Series ID: S000039554)

| Class ID   | Class Name          | Ticker Symbol   |
|:---|:---|:---|
| C000121983 | Institutional Class | RIVBX           |
| C000121984 | Investor Class      | RIVRX           |

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| | |
|:---|:---|
|  ![](triver_logo.jpg) | **Riverbridge Growth Fund**<br> **Investor Class: RIVRX**<br> **Institutional Class: RIVBX** |
|  **Summary Prospectus** | **March 31, 2026** |

---

*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 Statutory Prospectus and Statement of Additional Information and other information about the Fund online at https://riverbridge.com/growth*-fund*. You may also obtain this information at no cost by calling 1*-888-447-4470 *or by sending an e*-mail *request to Riverbridgefunds@umb.com. The Fund's Statutory Prospectus and Statement of Additional Information, both dated March 31, 2026, as each may be amended or supplemented, are incorporated by reference into this Summary Prospectus.*

#### Investment Objective
The investment objective of the Riverbridge Growth Fund (the "Fund") is to seek long term capital appreciation.

#### 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.**

---

| | | | | |
|:---|:---|:---|:---|:---|
|  |  | **Investor<br>Class<br>Shares** |  | **Institutional <br>Class <br>Shares** |
|  **Shareholder Fees** <br>*(fees paid directly from your investment)* |  |  |  |  |
|  Maximum sales charge (load) imposed on purchases |  |  |  |  |
|  Maximum deferred sales charge (load) |  |  |  |  |
|  Redemption fee if redeemed within 90 days of purchase (as a percentage of amount redeemed) |  | 1.00% |  | 1.00% |
|  Wire fee |  | $20 |  | $20 |
|  Overnight check delivery fee |  | $25 |  | $25 |
|  Retirement account fees (annual maintenance fee) |  | $15 |  | $15 |
|  **Annual Fund Operating Expenses** <br>*(expenses that you pay each year as a percentage of the value of your investment)* | **Annual Fund Operating Expenses** <br>*(expenses that you pay each year as a percentage of the value of your investment)* | **Annual Fund Operating Expenses** <br>*(expenses that you pay each year as a percentage of the value of your investment)* |  |  |
|  Management fees |  | 0.75% |  | 0.75% |
|  Distribution and service (Rule 12b-1) fees |  | 0.25% |  |  |
|  Other expenses |  | 0.31% |  | 0.31% |
| &nbsp;&nbsp;&nbsp;&nbsp; Shareholder service fees | 0.08% |  | 0.08% |  |
| &nbsp;&nbsp;&nbsp;&nbsp; All other expenses | 0.23% |  | 0.23% |  |
|  **Total annual fund operating expenses** |  | 1.31% |  | 1.06% |
|  Fees waived and/or expenses reimbursed<sup>1</sup> |  | (0.10)% |  | (0.10)% |
|  **Total annual fund operating expenses after waiving fees and/or reimbursing expenses**<sup>1</sup> |  | 1.21% |  | 0.96% |

---

<sup>1</sup> The Fund's advisor has contractually agreed to waive its fees and/or pay for operating expenses of the Fund to ensure that total annual fund operating expenses (excluding any taxes, leverage interest, brokerage commissions, dividend and interest expenses on short sales, acquired fund fees and expenses (as determined in accordance with

SEC Form N-1A), expenses incurred in connection with any merger or reorganization and extraordinary expenses such as litigation expenses) do not exceed 1.21% and 0.96% of the average daily net assets of the Fund's Investor Class and Institutional Class shares, respectively. This agreement is in effect through March 31, 2027, and it may be terminated before that date only by the Trust's Board of Trustees. The Fund's advisor is permitted to seek reimbursement from the Fund, subject to certain limitations, of fees waived or payments made to the Fund for a period ending three full fiscal years after the date of the waiver or payment. This reimbursement may be requested from the Fund if the reimbursement will not cause the Fund's annual expense ratio to exceed the lesser of (a) the expense limitation in effect at the time such fees were waived or payments made, or (b) the expense limitation in effect at the time of the reimbursement.

#### Example
This example is intended to help you compare the cost 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. The example reflects the Fund's contractual fee waiver and/or expense reimbursement only for the term of the contractual fee waiver and/or expense reimbursement.

Although your actual costs may be higher or lower, based on these assumptions your costs would be:

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| | | | | |
|:---|:---|:---|:---|:---|
|  | **One Year** | **Three Years** | **Five Years** | **Ten Years** |
|  Investor Class shares | $123 | $405 | $709 | $1570 |
|  Institutional Class shares | $98 | $327 | $575 | $1285 |

---

#### 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 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, the Fund's portfolio turnover rate was 7% of the average value of its portfolio.

#### Principal Investment Strategies
Under normal circumstances, the Fund invests in equity securities of companies of any size, including small- and mid-capitalization companies. The Fund's investments in equity securities may include common stock, preferred stock and convertible securities. While the Fund invests primarily in equity securities of U.S. issuers, it may invest in securities of non-U.S. issuers. The Fund's investments in foreign securities are primarily comprised of U.S. dollar-denominated securities of foreign issuers traded in the United States and American Depositary Receipts ("ADRs"). ADRs are receipts that represent interests in foreign securities held on deposit by U.S. banks. The Fund will invest in a portfolio of securities typically spread across many economic sectors, although from time to time, the Fund may have a significant portion of its assets in one or more market sectors such as the information technology sector. The Fund's advisor seeks to diversify the Fund's exposure to earnings catalysts (e.g. consumer spending, U.S. healthcare reimbursement and energy pricing) rather than limit the Fund's exposure to individual market sectors.

The Fund's advisor believes that earnings power determines the value of a franchise. The Fund's advisor focuses on companies that it views as building their earnings power and building their intrinsic, or actual, values over long periods of time. The Fund's advisor uses a bottom-up approach that seeks to identify high quality growth companies that demonstrate the ability to sustain strong secular earnings growth, regardless of overall economic conditions.

#### Principal Risks of Investing
Risk is inherent in all investing and you could lose money by investing in the Fund. A summary description of certain principal risks of investing in the Fund is set forth below. Before you decide whether to invest in the Fund, carefully consider these risk factors associated with investing in the Fund, which may cause investors to lose money. There can be no assurance that the Fund will achieve its investment objective.

***Market risk.*** The market price of a security or instrument may decline, sometimes rapidly or unpredictably, due to general market conditions that are not specifically related to a particular company, such as real or perceived adverse economic, political, or geopolitical conditions throughout the world, changes in the general outlook for corporate earnings, changes in interest or currency rates, or adverse investor sentiment generally. The market value of a security or instrument also may decline because of factors that affect a particular industry or industries, such as tariffs, labor shortages or increased production costs and competitive conditions within an industry. In addition, local, regional or global events such as war, acts of terrorism, international conflicts, the effects of climate change, trade disputes, supply chain disruptions, cybersecurity events, technological advances (such as artificial intelligence and machine learning), the spread of infectious illness or other public health issues, natural disasters or climate events, or other events could have a significant impact on a security or instrument. The increasing interconnectivity between global economies and financial markets increases the likelihood that events or conditions in one region or financial market may adversely impact issuers in a different country, region or financial market.

***Equity risk.*** The value of the equity securities held by the Fund may fall due to general market and economic conditions, perceptions regarding the industries in which the issuers of securities held by the Fund participate, or factors relating to specific companies in which the Fund invests.

***Growth***-oriented ***investment strategies risk.*** Growth funds generally focus on stocks of companies believed to have above-average potential for growth in revenue and earnings. Growth securities typically are very sensitive to market movements because their market prices frequently reflect projections of future earnings or revenues, and when it appears that those expectations will not be met, the prices of growth securities typically fall.

***Sector focus risk.*** The Fund may invest a larger portion of its assets in one or more sectors than many other mutual funds, and thus will be more susceptible to negative events affecting those sectors. For example, as of November 30, 2025, 35.8% of the Fund's net assets were invested in the information technology sector. Companies in the information technology sector can be significantly affected by intense competition, consumer preferences, problems with product compatibility and government regulation.

***Small***-cap ***and mid***-cap ***company risk.*** The securities of small-capitalization and mid-capitalization companies may be subject to more abrupt or erratic market movements and may have lower trading volumes or more erratic trading than securities of larger, more established companies or market averages in general. In addition, such companies typically are more likely to be adversely affected than large capitalization companies by changes in earning results, business prospects, investor expectations or poor economic or market conditions.

***Management and strategy risk.*** The value of your investment depends on the judgment of the Fund's advisor about the quality, relative yield, value or market trends affecting a particular security, industry, sector or region, which may prove to be incorrect.

***Foreign investment risk.*** The prices of foreign securities may be more volatile than the prices of securities of U.S. issuers because of economic and social conditions abroad, political developments, and changes in the regulatory environments of foreign countries. Changes in exchange rates and interest rates, and the imposition of sanctions, confiscations, trade restrictions (including tariffs) and other government restrictions by the United States and/or other governments may adversely affect the values of the Fund's foreign investments. Foreign companies are generally subject to different legal and accounting standards than U.S. companies, and foreign financial intermediaries may be subject to less supervision and regulation than U.S. financial firms. Foreign securities include ADRs. Unsponsored ADRs are organized independently and without the cooperation of the foreign issuer of the

underlying securities, and involve additional risks because U.S. reporting requirements do not apply. In addition, the issuing bank may deduct shareholder distribution, custody, foreign currency exchange, and other fees from the payment of dividends. Emerging markets tend to be more volatile than the markets of more mature economies and generally have less diverse and less mature economic structures and less stable political systems than those of developed countries.

***Issuer risk.*** Issuer-specific attributes may cause a security held by the Fund to be more volatile than the market generally. The prices of, and income generated by, securities held by the Fund may decline in response to various factors directly related to the issuers of such securities, including reduced demand for an issuer's goods or services, poor management performance, major litigation, investigations or other controversies related to the issuer, changes in the issuer's financial condition or credit rating, changes in government regulation affecting the issuer or its competitive environment, and strategic initiatives such as mergers, acquisitions or dispositions and the market response to any such initiatives. An individual security may also be affected by factors related to the industry or sector of the issuer or the securities markets as a whole, and conversely an industry or sector or the securities markets may be affected by a change in financial condition or another event affecting a single issuer. The value of an individual security or particular type of security may be more volatile than the market as a whole and may perform differently from the value of the market as a whole. At times, the Fund may invest more significantly in a single issuer, which could increase the Fund's volatility and the risk of loss arising from the factors described above.

***Preferred stock risk.*** Preferred stock represents an equity interest in a company that generally entitles the holder to receive, in preference to the holders of other stocks such as common stock, dividends and a fixed share of the proceeds resulting from a liquidation of the company. The market value of preferred stock is subject to company-specific and market risks applicable generally to equity securities and is also sensitive to changes in the company's creditworthiness, the ability of the company to make payments on the preferred stock, and changes in interest rates, typically declining in value if interest rates rise.

***Convertible securities risk.*** Convertible securities are subject to market and interest rate risk and credit risk. When the market price of the equity security underlying a convertible security decreases the convertible security tends to trade on the basis of its yield and other fixed income characteristics, and is more susceptible to credit and interest rate risks. When the market price of such equity security rises, the convertible security tends to trade on the basis of its equity conversion features and be more exposed to market risk. Convertible securities are typically issued by smaller capitalized companies with stock prices that may be more volatile than those of other companies.

***Recent market events.*** Periods of market volatility may occur in response to market events, public health emergencies, natural disasters or climate events, and other economic, political, and global macro factors. U.S. and international markets have recently experienced, and may continue to experience, periods of significant volatility due to various factors, including uncertainty regarding inflation and central banks' interest rate changes, the possibility of a national or global recession, trade tensions and tariffs, and political and geopolitical events. In addition, wars or threats of war and aggression, such as Russia's invasion of Ukraine and conflicts among nations and militant groups in the Middle East, have led, and in the future may lead, to increased short-term market volatility and may have adverse long-term effects on the U.S. and world economies and markets generally, each of which may negatively impact the Fund's investments. Additionally, since the change in the U.S. presidential administration in 2025, the administration has pursued an aggressive foreign policy agenda, including through suggestions that the United States should control certain sovereign foreign territories, attempts to restructure federal government agencies with international influence, and the imposition of tariffs and trade barriers on certain foreign countries, including China and long-time U.S. allies. These and other similar events could be prolonged and could adversely affect the value and liquidity of the Fund's investments, impair the Fund's ability to satisfy redemption requests, and negatively impact the Fund's performance.

***Cybersecurity risk.*** Cybersecurity incidents may allow an unauthorized party to gain access to Fund assets, customer data (including private shareholder information), or proprietary information, or cause the Fund, the Fund's advisor, and/or other service providers (including custodians, sub-custodians, transfer agents and financial intermediaries) to suffer data breaches, data corruption or loss of operational functionality. In an extreme case, a shareholder's ability to exchange or redeem Fund shares may be affected. The use of artificial intelligence and machine learning could exacerbate these risks. Issuers or securities in which the Fund invests are also subject to cybersecurity risks, and the value of those securities could decline is the issuers experience cybersecurity incidents.

#### Performance
The bar chart and table below provide some indication of the risks of investing in the Fund by showing changes in the Fund's performance from year to year for Institutional Class Shares and by showing how the average annual total returns of each class of the Fund compare with the average annual total returns of the S&P 500 Index, the Fund's broad-based securities market index, and the Russell 3000 Growth Index, the Fund's secondary benchmark index that more closely represents the investment exposure sought by the Fund. Performance for classes other than those shown may vary from the performance shown to the extent the expenses for those classes differ. Updated performance information is available at the Fund's website, www.riverbridge.com, or by calling the Fund at 1-888-447-4470. The Fund's past performance, before and after taxes, is not necessarily an indication of how the Fund will perform in the future.

#### Calendar Year Total Return (before taxes) for Institutional Class Shares
For each calendar year at net asset value per share ("NAV")

![](tbarchart_001.jpg)

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| | | |
|:---|:---|:---|
|  **Institutional Class Shares** |  |  |
|  Highest Calendar Quarter Return at NAV | 27.48% | Quarter Ended 06/30/2020 |
|  Lowest Calendar Quarter Return at NAV | (20.70)% | Quarter Ended 06/30/2022 |

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| | | | |
|:---|:---|:---|:---|
|  **Average Annual Total Returns <br>(for periods ended December 31, 2025)** | **One <br>Year** | **Five <br>Years** | **Ten <br>Years** |
|  Institutional Class Shares **–** Return Before Taxes | &nbsp;&nbsp;&nbsp;&nbsp;4.57% | &nbsp;&nbsp;&nbsp;&nbsp;4.56% | 12.49% |
|  Institutional Class Shares **–** Return After Taxes on Distributions\* | &nbsp;&nbsp;&nbsp;&nbsp;(0.65)% | &nbsp;&nbsp;&nbsp;&nbsp;3.19% | 11.35% |
|  Institutional Class Shares **–** Return After Taxes on Distributions and Sale of Fund Shares\* | &nbsp;&nbsp;&nbsp;&nbsp;6.51% | &nbsp;&nbsp;&nbsp;&nbsp;3.54% | 10.29% |
|  Investor Class Shares – Return Before Taxes | &nbsp;&nbsp;&nbsp;&nbsp;4.30% | &nbsp;&nbsp;&nbsp;&nbsp;4.30% | 12.24% |
|  S&P 500 Index (Reflects No Deductions for Fees, Expenses or Taxes) | 17.88% | 14.42% | 14.82% |
|  Russell 3000 Growth Index (Reflects No Deductions for Fees, Expenses or Taxes) | 18.15% | 14.59% | 17.59% |

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\* After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor's tax situation and may differ from those shown. After-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. After-tax returns are shown for Institutional Class Shares only and after-tax returns for classes other than Institutional Class will vary from returns shown for Institutional Class.

#### Investment Advisor
Riverbridge Partners, LLC (the "Advisor" or "Riverbridge")

#### Portfolio Manager
Ross Johnson, CFA, has served as portfolio manager of the Fund since January 1, 2021, and is primarily responsible for the day-to-day management of the Fund's portfolio.

#### Purchase and Sale of Fund Shares
To purchase shares of the Fund, you must invest at least the minimum amount.

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| | | |
|:---|:---|:---|
|  **Minimum Investments** | **To Open <br>Your Account** | **To Add to <br>Your Account** |
|  **Investor Class Shares** |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp; Direct Regular Accounts | $1000 | $100 |
| &nbsp;&nbsp;&nbsp;&nbsp; Direct Retirement Accounts | $1000 | $100 |
| &nbsp;&nbsp;&nbsp;&nbsp; Gift Account For Minors | $1000 | $100 |
|  **Institutional Class Shares** |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp; All Accounts | $2500 |  |

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Fund shares are redeemable on any business day the New York Stock Exchange (the "NYSE") is open for business, by written request or by telephone.

#### Tax Information
The Fund's distributions are generally taxable, and will ordinarily be taxed as ordinary income, qualified dividend income or capital gains, unless you are investing through a tax-advantaged arrangement, such as a 401(k) plan or an individual retirement account. Shareholders investing through such tax-advantaged arrangements may be taxed later upon withdrawal of monies from those arrangements.

#### Payments to Broker-Dealers and Other Financial Intermediaries
If you purchase shares of the Fund through a broker-dealer or other financial intermediary (such as a bank), 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.