TSAMX — Thornburg Summit Fund
Data updated: 2026-08-24
TSAMX — Thornburg Summit Fund. Balanced Allocation · $110.66M AUM · 0.95% expense ratio · 18.4% 1-yr return. Holdings, fees, performance and SEC filings.
TSAMX Fund Overview
TSAMX — Thornburg Summit Fund is a US mutual fund managed by Thornburg Investment Trust, categorised as Balanced Allocation. 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: Balanced Allocation
- Assets under management: $110.66M
- 1-year return: 18.4%
- Ticker: TSAMX
- SEC CIK: 0000816153
- SEC series ID: S000064930
- Share class ID: C000210187
TSAMX Holdings
Top 10 holdings of Thornburg Summit Fund by percentage of net assets, from the fund's latest SEC N-PORT filing.
| Holding | % of net assets |
|---|---|
| Samsung Electronics Co Ltd | 4.25% |
| Taiwan Semiconductor Manufacturing Co Ltd | 3.68% |
| Zegona Communications plc | 2.97% |
| United States Treasury | 2.45% |
| Citigroup Inc | 2.27% |
| Amazon.com Inc | 2.27% |
| Colliers International Group Inc | 2.14% |
| Alphabet Inc | 2.13% |
| Lumine Group Inc | 2.08% |
| Orange SA | 2.04% |
TSAMX Portfolio Allocation
Asset-class allocation of Thornburg Summit Fund by percentage of net assets, from the latest SEC N-PORT filing.
| Asset class | Allocation |
|---|---|
| Equity | 64.2% |
| Fixed Income | 17.8% |
| Securitized | 17.5% |
| Cash & Equivalents | 0.2% |
| Loans | 0.2% |
TSAMX Performance
Total returns for TSAMX (as of 2026-09-01), from SEC filings.
| Period | Total return |
|---|---|
| YTD | 6.9% |
| 1 year | 18.4% |
| 3 years (annualised) | 14.5% |
TSAMX Risk Information
Risk metrics for TSAMX, derived from monthly returns in SEC filings.
- 1-year volatility (annualised): 9.0%
TSAMX Costs and Fees
TSAMX costs about $95 per $10,000 invested per year in fund expenses.
- Net expense ratio: 0.95%
- Gross expense ratio: 1.83%
- Portfolio turnover: 33%
- Brokerage commissions: 2.06 bps of average net assets (SEC N-CEN)
TSAMX Cashflows
Over the 12 months to 2026-06, Thornburg Summit Fund had net inflows of $4.84M, from monthly SEC N-PORT filings.
| Month | Net flow |
|---|---|
| 2026-06 | −$669.52K |
| 2026-05 | −$61.54K |
| 2026-04 | $892.23K |
| 2026-03 | $1.05M |
| 2026-02 | −$1.59M |
| 2026-01 | $3.21M |
TSAMX Debt Constituents
Largest debt holdings of Thornburg Summit Fund by percentage of net assets, from the latest SEC N-PORT filing.
| Debt holding | % of net assets |
|---|---|
| United States Treasury | 2.45% |
| United States Treasury | 1.56% |
| United States Treasury | 1.44% |
| United States Treasury | 0.67% |
| United States Treasury | 0.63% |
| United States Treasury | 0.61% |
| United States Treasury | 0.57% |
| United States Treasury | 0.52% |
| Cco Hldgs Llc/cap Corp. | 0.42% |
| Uzbekistan Intl Bond | 0.36% |
TSAMX Prospectus and SEC Filings
Official Thornburg Summit 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 2026-08-21
- 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 Balanced Allocation 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.