ALTHX — AB National Portfolio
Data updated: 2026-07-24
ALTHX — AB National Portfolio. Long Municipal - National Bond · $2.00B AUM · 0.75% expense ratio. Holdings, fees, performance and SEC filings.
ALTHX Fund Overview
ALTHX — AB National Portfolio is a US mutual fund managed by Ab Municipal Income Fund, Inc., 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: Ab Municipal Income Fund, Inc.
- Category: Long Municipal - National Bond
- Assets under management: $2.00B
- 1-year return: 6.7%
- Ticker: ALTHX
- SEC CIK: 0000798737
- SEC series ID: S000010351
- Share class ID: C000028628
ALTHX Holdings
Top 10 holdings of AB National Portfolio by percentage of net assets, from the fund's latest SEC N-PORT filing.
| Holding | % of net assets |
|---|---|
| Lamar Consolidated Independent School District | 1.01% |
| San Francisco City & County Airport Comm-San Francisco International Airport | 0.87% |
| Illinois State Toll Highway Authority | 0.80% |
| City of Tacoma WA Electric System Revenue | 0.78% |
| New York Transportation Development Corp | 0.75% |
| California Municipal Finance Authority | 0.62% |
| Private Colleges & Universities Authority | 0.62% |
| District of Columbia Income Tax Revenue | 0.59% |
| San Diego County Regional Airport Authority | 0.58% |
| Port of Seattle WA | 0.57% |
ALTHX Portfolio Allocation
Asset-class allocation of AB National Portfolio by percentage of net assets, from the latest SEC N-PORT filing.
| Asset class | Allocation |
|---|---|
| Fixed Income | 98.6% |
| Securitized | 0.6% |
| Cash & Equivalents | 0.5% |
| Real Estate | 0.2% |
ALTHX Performance
Total returns for ALTHX (as of 2026-09-01), from SEC filings.
| Period | Total return |
|---|---|
| YTD | 1.5% |
| 1 year | 6.7% |
| 3 years (annualised) | 3.9% |
| 5 years (annualised) | 0.8% |
ALTHX Risk Information
Risk metrics for ALTHX, derived from monthly returns in SEC filings.
- 1-year volatility (annualised): 3.8%
ALTHX Costs and Fees
ALTHX costs about $75 per $10,000 invested per year in fund expenses.
- Net expense ratio: 0.75%
- Gross expense ratio: 0.78%
- Portfolio turnover: 33%
- Brokerage commissions: 0.00 bps of average net assets (SEC N-CEN)
ALTHX Cashflows
Over the 12 months to 2026-05, AB National Portfolio had net inflows of $102.75M, from monthly SEC N-PORT filings.
| Month | Net flow |
|---|---|
| 2026-05 | $17.76M |
| 2026-04 | $2.05M |
| 2026-03 | $18.13M |
| 2026-02 | $9.76M |
| 2026-01 | $22.90M |
| 2025-12 | $13.69M |
ALTHX Debt Constituents
Largest debt holdings of AB National Portfolio by percentage of net assets, from the latest SEC N-PORT filing.
| Debt holding | % of net assets |
|---|---|
| Lamar Consolidated Independent School District | 1.01% |
| San Francisco City & County Airport Comm-San Francisco International Airport | 0.87% |
| Illinois State Toll Highway Authority | 0.80% |
| City of Tacoma WA Electric System Revenue | 0.78% |
| New York Transportation Development Corp | 0.75% |
| California Municipal Finance Authority | 0.62% |
| Private Colleges & Universities Authority | 0.62% |
| District of Columbia Income Tax Revenue | 0.59% |
| San Diego County Regional Airport Authority | 0.58% |
| Port of Seattle WA | 0.57% |
ALTHX Prospectus and SEC Filings
Official AB National Portfolio filings on SEC EDGAR — prospectus, portfolio holdings and annual reports.
- Prospectus (485BPOS) — filed 2025-09-26
- Prospectus (485BPOS) — filed 2024-09-26
- Prospectus (485BPOS) — filed 2023-09-27
- Portfolio holdings (N-PORT) — filed 2026-07-24
- Portfolio holdings (N-PORT) — filed 2026-04-24
- Portfolio holdings (N-PORT) — filed 2026-01-23
- Annual census (N-CEN) — filed 2025-08-14
- Annual census (N-CEN) — filed 2024-08-12
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.