MUNX — AMG GW&K Muni Income ETF
Data updated: 2026-08-28
MUNX — AMG GW&K Muni Income ETF. Long Municipal - National Bond · $20.14M AUM · 0.29% expense ratio. Holdings, fees, performance and SEC filings.
MUNX Fund Overview
MUNX — AMG GW&K Muni Income ETF is a US ETF managed by AMG ETF 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 ETF
- Manager: AMG ETF Trust
- Category: Long Municipal - National Bond
- Assets under management: $20.14M
- Ticker: MUNX
- SEC CIK: 0000879947
- SEC series ID: S000095116
- Share class ID: C000263709
MUNX Holdings
Top 10 holdings of AMG GW&K Muni Income ETF by percentage of net assets, from the fund's latest SEC N-PORT filing.
| Holding | % of net assets |
|---|---|
| Commonwealth Financing Authority (pa) | 3.12% |
| Fixed Income Clearing Corporation | 2.99% |
| Jefferson (al), County Of | 2.61% |
| Pennsylvania Economic Development Financing Authority (pa) | 2.57% |
| Houston Tex | 2.21% |
| North Dakota St Hsg Fin Agy | 2.14% |
| New York Transportation Development Corp. (ny) | 2.12% |
| Philadelphia (pa), City Of | 2.12% |
| Jea (fl) | 2.07% |
| Massachusetts St Dev Fin Agy | 2.04% |
MUNX Portfolio Allocation
Asset-class allocation of AMG GW&K Muni Income ETF by percentage of net assets, from the latest SEC N-PORT filing.
| Asset class | Allocation |
|---|---|
| Fixed Income | 97.0% |
| Cash & Equivalents | 3.0% |
MUNX Performance
Total returns for MUNX (as of 2026-09-01), from SEC filings.
| Period | Total return |
|---|---|
| YTD | 2.4% |
MUNX Costs and Fees
MUNX costs about $29 per $10,000 invested per year in fund expenses.
- Net expense ratio: 0.29%
- Gross expense ratio: 0.29%
- Portfolio turnover: 23%
- Brokerage commissions: 0.00 bps of average net assets (SEC N-CEN)
MUNX Cashflows
Over the 12 months to 2026-06, AMG GW&K Muni Income ETF had net inflows of $10.53M, from monthly SEC N-PORT filings.
| Month | Net flow |
|---|---|
| 2026-06 | $2.00M |
| 2026-05 | $0 |
| 2026-04 | $991.53K |
| 2026-03 | $0 |
| 2026-02 | $2.53M |
| 2026-01 | $4.81K |
MUNX Debt Constituents
Largest debt holdings of AMG GW&K Muni Income ETF by percentage of net assets, from the latest SEC N-PORT filing.
| Debt holding | % of net assets |
|---|---|
| Commonwealth Financing Authority (pa) | 3.12% |
| Jefferson (al), County Of | 2.61% |
| Pennsylvania Economic Development Financing Authority (pa) | 2.57% |
| Houston Tex | 2.21% |
| North Dakota St Hsg Fin Agy | 2.14% |
| New York Transportation Development Corp. (ny) | 2.12% |
| Philadelphia (pa), City Of | 2.12% |
| Jea (fl) | 2.07% |
| Massachusetts St Dev Fin Agy | 2.04% |
| Texas Private Activity Bd Surface Transportation Corp. | 1.96% |
MUNX Prospectus and SEC Filings
Official AMG GW&K Muni Income ETF filings on SEC EDGAR — prospectus, portfolio holdings and annual reports.
- Prospectus (485BPOS) — filed 2026-04-30
- Prospectus (485BPOS) — filed 2025-09-15
- Prospectus supplement (497) — filed 2025-09-25
- Portfolio holdings (N-PORT) — filed 2026-08-28
- Portfolio holdings (N-PORT) — filed 2026-06-01
- Portfolio holdings (N-PORT) — filed 2026-02-26
- Annual census (N-CEN) — filed 2026-03-16
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.