SGSLX — Western Asset Mortgage Backed Securities Fund
Data updated: 2026-08-26
SGSLX — Western Asset Mortgage Backed Securities Fund. Long Securitized (MBS/ABS/CMBS) Bond · $328.10M AUM. Holdings, fees, performance and SEC filings.
SGSLX Fund Overview
SGSLX — Western Asset Mortgage Backed Securities Fund is a US mutual fund managed by Legg Mason Partners Income Trust, categorised as Long Securitized (MBS/ABS/CMBS) Bond. ABC INVEST provides holdings, performance, costs, cashflows, risk data, prospectus documents and SEC filings, sourced from SEC filings.
- Type: US mutual fund
- Manager: Legg Mason Partners Income Trust
- Category: Long Securitized (MBS/ABS/CMBS) Bond
- Assets under management: $328.10M
- 1-year return: 4.3%
- Ticker: SGSLX
- SEC CIK: 0000764624
- SEC series ID: S000016649
- Share class ID: C000046508
SGSLX Holdings
Top 10 holdings of Western Asset Mortgage Backed Securities Fund by percentage of net assets, from the fund's latest SEC N-PORT filing.
| Holding | % of net assets |
|---|---|
| Federal National Mortgage Association | 7.80% |
| Federal National Mortgage Association | 7.76% |
| Federal National Mortgage Association | 5.89% |
| Federal National Mortgage Association | 4.30% |
| Government National Mortgage Association | 4.29% |
| Federal National Mortgage Association | 4.04% |
| Government National Mortgage Association Remic Trust | 3.88% |
| Federal National Mortgage Association | 3.24% |
| Federal National Mortgage Association | 3.03% |
| Government National Mortgage Association | 2.40% |
SGSLX Portfolio Allocation
Asset-class allocation of Western Asset Mortgage Backed Securities Fund by percentage of net assets, from the latest SEC N-PORT filing.
| Asset class | Allocation |
|---|---|
| Securitized | 154.0% |
| Fixed Income | 2.5% |
| Equity | 1.4% |
| Cash & Equivalents | 0.5% |
| Loans | 0.2% |
| Real Estate | 0.1% |
SGSLX Performance
Total returns for SGSLX (as of 2026-09-01), from SEC filings.
| Period | Total return |
|---|---|
| YTD | 1.3% |
| 1 year | 4.3% |
| 3 years (annualised) | 4.2% |
| 5 years (annualised) | -0.5% |
SGSLX Risk Information
Risk metrics for SGSLX, derived from monthly returns in SEC filings.
- 1-year volatility (annualised): 3.1%
SGSLX Costs and Fees
SGSLX costs about $175 per $10,000 invested per year in fund expenses.
- Net expense ratio: 1.75%
- Gross expense ratio: 2.39%
- Portfolio turnover: 198%
- Brokerage commissions: 0.38 bps of average net assets (SEC N-CEN)
SGSLX Cashflows
Over the 12 months to 2026-06, Western Asset Mortgage Backed Securities Fund had net outflows of $35.19M, from monthly SEC N-PORT filings.
| Month | Net flow |
|---|---|
| 2026-06 | −$3.09M |
| 2026-05 | −$3.27M |
| 2026-04 | −$3.72M |
| 2026-03 | −$2.48M |
| 2026-02 | −$1.51M |
| 2026-01 | −$6.83M |
SGSLX Debt Constituents
Largest debt holdings of Western Asset Mortgage Backed Securities Fund by percentage of net assets, from the latest SEC N-PORT filing.
| Debt holding | % of net assets |
|---|---|
| Aligned Data Centers Issuer LLC 6.688% Bds 15/06/56 Usd25000144a | 0.37% |
| Full House Resorts, Inc. | 0.36% |
| Expand Energy Corp. | 0.33% |
| Carnival Corp. Ltd. | 0.27% |
| Venture Global Calcasieu Pass LLC | 0.27% |
| Royal Caribbean Cruises Ltd. | 0.26% |
| Arbor Realty Sr, Inc. | 0.20% |
| Zf North America Capital, Inc. | 0.20% |
| Arbor Realty Sr, Inc. | 0.12% |
| Chs/community Health Systems, Inc. | 0.08% |
SGSLX Prospectus and SEC Filings
Official Western Asset Mortgage Backed Securities Fund filings on SEC EDGAR — prospectus, portfolio holdings and annual reports.
- Prospectus (485BPOS) — filed 2026-04-24
- Prospectus (485BPOS) — filed 2025-04-24
- Prospectus (485BPOS) — filed 2024-04-24
- Portfolio holdings (N-PORT) — filed 2026-08-26
- Portfolio holdings (N-PORT) — filed 2026-05-28
- Portfolio holdings (N-PORT) — filed 2026-02-23
- Annual census (N-CEN) — filed 2026-03-11
- Annual census (N-CEN) — filed 2025-03-13
Related Funds
Other Long Securitized (MBS/ABS/CMBS) 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.