THMMX — Thornburg Municipal Managed Account Fund
Data updated: 2026-08-24
THMMX — Thornburg Municipal Managed Account Fund. Long Municipal - National Bond · $12.50M AUM. Holdings, fees, performance and SEC filings.
THMMX Fund Overview
THMMX — Thornburg Municipal Managed Account 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: $12.50M
- 1-year return: 7.5%
- Ticker: THMMX
- SEC CIK: 0000816153
- SEC series ID: S000079976
- Share class ID: C000241473
THMMX Holdings
Top 10 holdings of Thornburg Municipal Managed Account Fund by percentage of net assets, from the fund's latest SEC N-PORT filing.
| Holding | % of net assets |
|---|---|
| Energy Southeast A Cooperative District | 2.58% |
| City of Detroit MI | 2.22% |
| Kentucky Public Energy Authority | 2.14% |
| Black Belt Energy Gas District | 2.13% |
| California Community Choice Financing Authority | 2.12% |
| Southeast Alabama Gas Supply District/The | 2.12% |
| Indiana Finance Authority | 2.09% |
| County of Washoe NV | 2.04% |
| City of Farmington NM | 2.04% |
| New Mexico Mortgage Finance Authority | 2.01% |
THMMX Portfolio Allocation
Asset-class allocation of Thornburg Municipal Managed Account Fund by percentage of net assets, from the latest SEC N-PORT filing.
| Asset class | Allocation |
|---|---|
| Fixed Income | 99.1% |
| Equity | 0.6% |
THMMX Performance
Total returns for THMMX (as of 2026-09-01), from SEC filings.
| Period | Total return |
|---|---|
| YTD | 3.0% |
| 1 year | 7.5% |
| 3 years (annualised) | 5.8% |
THMMX Risk Information
Risk metrics for THMMX, derived from monthly returns in SEC filings.
- 1-year volatility (annualised): 3.7%
THMMX Costs and Fees
THMMX costs about $0 per $10,000 invested per year in fund expenses.
- Net expense ratio: 0.00%
- Gross expense ratio: 1.20%
- Portfolio turnover: 51%
- Brokerage commissions: 0.00 bps of average net assets (SEC N-CEN)
THMMX Cashflows
Over the 12 months to 2026-06, Thornburg Municipal Managed Account Fund had net inflows of $545.83K, from monthly SEC N-PORT filings.
| Month | Net flow |
|---|---|
| 2026-06 | $49.73K |
| 2026-05 | $49.64K |
| 2026-04 | −$82.69K |
| 2026-03 | $49.08K |
| 2026-02 | $48.91K |
| 2026-01 | $48.86K |
THMMX Debt Constituents
Largest debt holdings of Thornburg Municipal Managed Account Fund by percentage of net assets, from the latest SEC N-PORT filing.
| Debt holding | % of net assets |
|---|---|
| Energy Southeast A Cooperative District | 2.58% |
| City of Detroit MI | 2.22% |
| Kentucky Public Energy Authority | 2.14% |
| Black Belt Energy Gas District | 2.13% |
| California Community Choice Financing Authority | 2.12% |
| Southeast Alabama Gas Supply District/The | 2.12% |
| Indiana Finance Authority | 2.09% |
| County of Washoe NV | 2.04% |
| City of Farmington NM | 2.04% |
| New Mexico Mortgage Finance Authority | 2.01% |
THMMX Prospectus and SEC Filings
Official Thornburg Municipal Managed Account Fund filings on SEC EDGAR — prospectus, portfolio holdings and annual reports.
- Prospectus (485BPOS) — filed 2026-01-28
- Prospectus (485BPOS) — filed 2026-01-27
- Prospectus supplement (497) — filed 2025-01-31
- 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.