Key features
            
            
            
            
                    
                
  
    
      Investing in U.S. mid-cap growth companies demonstrating profitability, balance sheet strength and attractive valuations
     
    
      Evaluating growth and valuation to identify Greenfield Growth, Stable Growth and Unrecognized Growth
     
    
      Applying risk management process through every stage of the investment process and portfolio construction
     
   
 
                    
                
  
    Daily pricing 
          
            as of 
            10/30/2025
    
      
      
        NAV 1-day net change
        -0.43
       
      
     
   
  
    Total net assets 
          
            as of 
            09/30/2025
    All share classes
    $4.5 billion
            
   
 
                    
                Overview
  
  
    
      
        
          | Fund identifiers | 
      
      
        
          | NASDAQ | WMGYX | 
        
          | CUSIP | 466000544 | 
      
    
   
  
  
 
            Benchmark and peer group
        
    
        
    
        
            
                Portfolio
            
            
            
            
                    
                
    
                        Market cap (median) Source: FactSet
    $20.6 billion
   
    
                        Market cap (weighted average) Source: FactSet
    $34.3 billion
   
    Portfolio turnover (last fiscal year)
    42%
   
  
  
    International equities & depositary receipts
    2.7%
   
  
    Cash, cash equivalents and other assets
    0.1%
   
 
                    
                
  
      Top 10 holdings 
        as of 09/30/2025
  Holdings are as of the date indicated and subject to change.
  List may exclude cash and cash equivalents. Please see the Fund's complete list of holdings for more information.
  Holdings based by issuer.
  
  
    
      IDEXX LABORATORIES INC.
      3.88
     
    
      ROYAL CARIBBEAN CRUISES LTD
      3.69
     
    
    
    
      ALNYLAM PHARMACEUTICALS INC
      2.87
     
    
    
      MONOLITHIC POWER SYSTEMS INC
      2.61
     
    
    
    
      HOWMET AEROSPACE INC
      2.16
     
   
  
              Total % Portfolio in Top 10 holdings - 29.08%
 
                    
                
                      Sector allocation
                    
                as of 09/30/2025
List may exclude cash, cash equivalents, and exchange-traded funds (ETFs) that are used for cash management purposes. Please see the Fund’s complete list of holdings for more information.
  
  
    
      
      
          Information technology
          23.5%
         
          Consumer discretionary
          20.4%
         
          Communication services
          1.2%
         
       
   
 
                    
                
                    
                
                    
                
                    
                
                    
                
  
          Distribution history - annual distributions (Class Y)1,2
Distributions ($ per share)
  
  
  1If a Fund makes a distribution from any source other than net income, it is required to
          provide shareholders with a notice disclosing the source of such distribution (each a "Notice"). The
          amounts and sources of distributions reported above and in each Notice are only estimates and are not
          provided for tax reporting purposes. Each Fund will send each shareholder a Form 1099 DIV for the
          calendar year that will provide definitive information on how to report the Fund's distributions for
          federal income tax purposes. The information in the table above will not be updated to reflect any
          subsequent recharacterization of dividends and distributions. Click here to see recent
          Notices pertaining to the Fund (if any).
        
  2Information on return of capital distributions (if any) is only provided from June 1, 2014 onward.
    
  3Includes both short- and long-term capital gains.
    
 
            
        
    
        
            
                Management
            
            
    
            
	
                
                    
                    
                        
                            Kimberly Scott, CFA
                        
                        
                            - 
                                Senior Portfolio Manager
                                
 
- 
                                Start date on the Fund:
                                February 2001
                            
- 
                                Years of industry experience:
                                38
                            
- 
                                Read bio
                            
 
                 
                
                
                
                    
                        
                        
                            
                                Kimberly Scott
                            
                            
                                
                            
                            
                            
                                Senior Portfolio Manager
                            
                            
                            
                                
    - Joined Ivy Investments in 1999, acquired by Macquarie in 2021
- Based in Kansas City
Kim is a Senior Portfolio Manager and Team Lead for Macquarie Asset Management’s (MAM’s) US Mid Cap Equities Team, where she is responsible for making day-to-day investment decisions for the team’s strategy.
Kim joined Ivy Investments as an Investment Analyst and was appointed Portfolio Manager in 2002.
She received a Bachelor of Science in microbiology from the University of Kansas and earned a Master of Business Administration from the University of Cincinnati. Kim holds the Chartered Financial Analyst® designation.
                            
                         
                        
                     
                 
                 
            
 
        
            
	
                
                    
                    
                        
                            Bradley Halverson, CFA
                        
                        
                            - 
                                Senior Portfolio Manager
                                
 
- 
                                Start date on the Fund:
                                November 2021
                            
- 
                                Years of industry experience:
                                23
                            
- 
                                Read bio
                            
 
                 
                
                
                
                    
                        
                        
                            
                                Bradley Halverson
                            
                            
                                
                            
                            
                            
                                Senior Portfolio Manager
                            
                            
                            
                                
    - Joined Ivy Investments in 2008, acquired by Macquarie in 2021
- Based in Kansas City
Brad is a Senior Portfolio Manager for Macquarie Asset Management’s (MAM’s) US Mid Cap Equities Team, where he is responsible for making day-to-day investment decisions for the team’s strategy.
Brad joined Ivy Investments as an Investment Analyst and was appointed Portfolio Manager in 2016.
Brad earned a Bachelor of Science and a Master of Science in accounting from Brigham Young University and a Master of Business Administration with an emphasis in finance and corporate strategy from the University of Michigan. Brad holds the Chartered Financial Analyst® designation.
                            
                         
                        
                     
                 
                 
            
 
        
 
            
            
            
        
    
        
            
                Fees
            
            
            
            
                    
                
  
  
    
                     The table below 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 below. You may
                     qualify for sales-charge discounts if you and your family invest, or agree to invest in the
                     future, at least $50,000 in Macquarie Funds. More information about these and other
                     discounts is available from your financial intermediary, in the Fund’s Prospectus under the
                     section entitled “About your account,” and in the Fund’s statement of additional information
                     (SAI) under the section entitled “Purchasing Shares.”
                  
   
 
  
    
      
        
          | Shareholder fees | 
      
      
        
          | Maximum sales charge (load) imposed on purchases as a percentage of offering price | none | 
        
          | Maximum contingent deferred sales charge (load) as a percentage of original purchase price or redemption price, whichever is lower | none | 
      
    
   
  
    
      
        
          | Annual fund operating expenses | 
      
      
        
          | Management fees | 0.79% | 
        
          | Distribution and service (12b-1) fees | 0.25% | 
        
          | Other expenses | 0.16% | 
        
          | Total annual fund operating expenses | 1.20% | 
        
          | Fee waivers and expense reimbursements1 | (0.16%) | 
        
          | Total annual fund operating expenses after fee waivers and expense reimbursements | 1.04% | 
      
    
   
 
1Net expense ratio reflects a contractual waiver of certain fees and/or expense reimbursements from July 31, 2025 through July 30, 2026. Please see the fee table in the Fund's prospectus for more information.
Class Y shares are available only to certain investors.
Please see the prospectus and SAI for additional information.
            
        
    
        
            
                Resources
            
            
    
    
        
            
                
                    Fact sheet and commentaries
                    
                 
                
                
                    Shareholder report – Annual
                    
                    Shareholder report – Semi-annual
                    
                 
                
             
         
     
 
    
    
 
            
            
                    
                
            
        
    
        
    
    
    
 
 
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