William Blair Ultra-Short Duration Bond Fund Class N
WBLNX
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USD
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Capital Structure
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in mil. unless spec.Quarterly Earnings Per Share
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in mil. unless spec.- Sector
- Financial Services
- Industry
- Asset Management - Bonds
- Address
- 150 North Riverside Plaza Chicago IL United States of America 60606
- IPO Date
- Jan 2, 2019
- CIK
- 0000822632
- Similar Companies
- Business
- William Blair Ultra-Short Duration Bond Fund Class N (WBLNX) is an open-end mutual fund that seeks to maximize total return, consisting of current income and capital appreciation, through investments in ultra-short duration fixed income securities. The fund normally invests at least 80% of its net assets (plus any borrowings for investment purposes) in a diversified portfolio of investment-grade debt obligations, including U.S. government securities, corporate bonds, mortgage-backed securities, asset-backed securities, and money market instruments with effective durations typically under one year; it may allocate up to 10% in below-investment-grade securities for yield enhancement. Managed by William Blair & Company, L.L.C., a Chicago-based independent investment firm founded in 1935 and headquartered at the Franklin Center in Chicago, Illinois, the fund targets institutional and retail investors seeking low volatility income solutions within the ultrashort bond category. The fund offers Class N shares with an expense ratio of approximately 0.35% to 0.72%, monthly dividend distributions, and a focus on preservation of capital amid fluctuating interest rates; as of recent data, it maintains net assets around $40.5 million, with portfolio characteristics including an average yield to worst of over 4%, effective duration of about 0.5 years, and holdings diversified across high-quality sectors like U.S. Treasuries, agencies, and corporates. Geographically, the fund primarily invests in U.S. dollar-denominated securities issued by domestic and foreign entities, serving a broad base of taxable fixed income investors across the United States. In recent years, the fund underwent a name change from William Blair Low Duration Fund to William Blair Ultra-Short Duration Bond Fund, reflecting a refined emphasis on ultra-short maturities; it was closed to new investors effective February 14, 2022, with a brief extension for existing shareholders until February 28, 2022, to manage capacity and asset growth. Amid broader firm developments, William Blair & Company has expanded its private capital advisory and investment management operations, including senior hires in Europe and new coverage initiations in biotechnology, though no specific partnerships, funding rounds, or product launches directly impacted WBLNX in 2024-2025. The fund continues monthly income distributions, with yields supported by prevailing short-term rates, positioning it within William Blair's lineup of fixed income strategies offered globally through over 20 offices.