TLMIX — Thornburg Short Duration Municipal Fund
Data updated: 2026-08-24
TLMIX — Thornburg Short Duration Municipal Fund. Long Municipal - National Bond · $90.63M AUM. Holdings, fees, performance and SEC filings.
TLMIX Fund Overview
TLMIX — Thornburg Short Duration Municipal Fund is a US mutual fund managed by Thornburg Investment Trust, categorised as Long Municipal - National Bond. ABC INVEST provides holdings, performance, costs, cashflows, risk data, prospectus documents and SEC filings, sourced from SEC filings.
- Type: US mutual fund
- Manager: Thornburg Investment Trust
- Category: Long Municipal - National Bond
- Assets under management: $90.63M
- 1-year return: 3.3%
- Ticker: TLMIX
- SEC CIK: 0000816153
- SEC series ID: S000043669
- Share class ID: C000135384
TLMIX Holdings
Top 10 holdings of Thornburg Short Duration Municipal Fund by percentage of net assets, from the fund's latest SEC N-PORT filing.
| Holding | % of net assets |
|---|---|
| Kentucky Public Energy Authority | 2.56% |
| Tennergy Corp/TN | 2.38% |
| City of Los Angeles Department of Airports | 2.37% |
| Travis County Housing Finance Corp | 2.34% |
| Black Belt Energy Gas District | 2.31% |
| Harris County Cultural Education Facilities Finance Corp | 2.25% |
| County of Montgomery OH | 1.99% |
| Halifax County Industrial Development Authority | 1.81% |
| Arizona Industrial Development Authority | 1.67% |
| Pennsylvania Economic Development Financing Authority | 1.66% |
TLMIX Portfolio Allocation
Asset-class allocation of Thornburg Short Duration Municipal Fund by percentage of net assets, from the latest SEC N-PORT filing.
| Asset class | Allocation |
|---|---|
| Fixed Income | 100.0% |
TLMIX Performance
Total returns for TLMIX (as of 2026-09-01), from SEC filings.
| Period | Total return |
|---|---|
| YTD | 1.4% |
| 1 year | 3.3% |
| 3 years (annualised) | 3.4% |
| 5 years (annualised) | 1.8% |
TLMIX Risk Information
Risk metrics for TLMIX, derived from monthly returns in SEC filings.
- 1-year volatility (annualised): 1.2%
TLMIX Costs and Fees
TLMIX costs about $50 per $10,000 invested per year in fund expenses.
- Net expense ratio: 0.50%
- Gross expense ratio: 0.64%
- Portfolio turnover: 55%
- Brokerage commissions: 0.00 bps of average net assets (SEC N-CEN)
TLMIX Cashflows
Over the 12 months to 2026-06, Thornburg Short Duration Municipal Fund had net outflows of $24.76M, from monthly SEC N-PORT filings.
| Month | Net flow |
|---|---|
| 2026-06 | $307.78K |
| 2026-05 | −$1.30M |
| 2026-04 | −$2.48M |
| 2026-03 | −$4.27M |
| 2026-02 | −$12.30M |
| 2026-01 | $234.69K |
TLMIX Debt Constituents
Largest debt holdings of Thornburg Short Duration Municipal Fund by percentage of net assets, from the latest SEC N-PORT filing.
| Debt holding | % of net assets |
|---|---|
| Kentucky Public Energy Authority | 2.56% |
| Tennergy Corp/TN | 2.38% |
| City of Los Angeles Department of Airports | 2.37% |
| Travis County Housing Finance Corp | 2.34% |
| Black Belt Energy Gas District | 2.31% |
| Harris County Cultural Education Facilities Finance Corp | 2.25% |
| County of Montgomery OH | 1.99% |
| Halifax County Industrial Development Authority | 1.81% |
| Arizona Industrial Development Authority | 1.67% |
| Pennsylvania Economic Development Financing Authority | 1.66% |
TLMIX Prospectus and SEC Filings
Official Thornburg Short Duration Municipal Fund filings on SEC EDGAR — prospectus, portfolio holdings and annual reports.
- Prospectus (485BPOS) — filed 2026-01-28
- Prospectus (485BPOS) — filed 2026-01-27
- Prospectus (485BPOS) — filed 2025-01-28
- Portfolio holdings (N-PORT) — filed 2026-08-24
- Portfolio holdings (N-PORT) — filed 2026-05-26
- Portfolio holdings (N-PORT) — filed 2026-02-20
- Annual census (N-CEN) — filed 2025-12-02
- Annual census (N-CEN) — filed 2024-12-02
Related Funds
Other Long Municipal - National Bond funds tracked on ABC INVEST:
Data Sources
ABC INVEST compiles this page from public filings made to the U.S. Securities and Exchange Commission (SEC) through EDGAR: portfolio holdings and monthly cashflows from Form N-PORT, expenses and returns from fund prospectuses (Form 485BPOS) and the SEC DERA Risk/Return Summary data sets, annual data from Form N-CEN, and shareholder reports from Form N-CSR.