GWMIX — AMG GW&K Municipal Bond Fund
Data updated: 2026-08-28
GWMIX — AMG GW&K Municipal Bond Fund. Long Municipal - National Bond · $999.38M AUM · 0.39% expense ratio. Holdings, fees, performance and SEC filings.
GWMIX Fund Overview
GWMIX — AMG GW&K Municipal Bond Fund is a US mutual fund managed by Amg Funds, 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: Amg Funds
- Category: Long Municipal - National Bond
- Assets under management: $999.38M
- 1-year return: 7.2%
- Ticker: GWMIX
- SEC CIK: 0001089951
- SEC series ID: S000025838
- Share class ID: C000077267
GWMIX Holdings
Top 10 holdings of AMG GW&K Municipal Bond Fund by percentage of net assets, from the fund's latest SEC N-PORT filing.
| Holding | % of net assets |
|---|---|
| Fixed Income Clearing Corporation | 4.00% |
| Southeast Energy Authority (al) | 1.48% |
| Louisiana Stad & Exposition Dist | 1.24% |
| Illinois (il), State Of | 1.09% |
| California Community Choice Financing Authority (ca) | 1.07% |
| New York Transportation Development Corp. (ny) | 1.07% |
| Chicago (il), City Of | 1.04% |
| State Board Of Administration Finance Corp. | 1.04% |
| Florida Dev Fin Corp. | 1.02% |
| Great Lakes Wtr Auth Mich | 1.02% |
GWMIX Portfolio Allocation
Asset-class allocation of AMG GW&K Municipal Bond Fund by percentage of net assets, from the latest SEC N-PORT filing.
| Asset class | Allocation |
|---|---|
| Fixed Income | 99.3% |
| Cash & Equivalents | 4.0% |
GWMIX Performance
Total returns for GWMIX (as of 2026-09-01), from SEC filings.
| Period | Total return |
|---|---|
| YTD | 1.7% |
| 1 year | 7.2% |
| 3 years (annualised) | 3.7% |
| 5 years (annualised) | 1.1% |
GWMIX Risk Information
Risk metrics for GWMIX, derived from monthly returns in SEC filings.
- 1-year volatility (annualised): 4.8%
GWMIX Costs and Fees
GWMIX costs about $39 per $10,000 invested per year in fund expenses.
- Net expense ratio: 0.39%
- Gross expense ratio: 0.46%
- Portfolio turnover: 61%
- Brokerage commissions: 0.00 bps of average net assets (SEC N-CEN)
GWMIX Cashflows
Over the 12 months to 2026-06, AMG GW&K Municipal Bond Fund had net inflows of $34.70M, from monthly SEC N-PORT filings.
| Month | Net flow |
|---|---|
| 2026-06 | $1.71M |
| 2026-05 | $1.06M |
| 2026-04 | $6.21M |
| 2026-03 | $7.50M |
| 2026-02 | $4.57M |
| 2026-01 | $4.57M |
GWMIX Debt Constituents
Largest debt holdings of AMG GW&K Municipal Bond Fund by percentage of net assets, from the latest SEC N-PORT filing.
| Debt holding | % of net assets |
|---|---|
| Southeast Energy Authority (al) | 1.48% |
| Louisiana Stad & Exposition Dist | 1.24% |
| Illinois (il), State Of | 1.09% |
| California Community Choice Financing Authority (ca) | 1.07% |
| New York Transportation Development Corp. (ny) | 1.07% |
| Chicago (il), City Of | 1.04% |
| State Board Of Administration Finance Corp. | 1.04% |
| Florida Dev Fin Corp. | 1.02% |
| Great Lakes Wtr Auth Mich | 1.02% |
| Los Angeles City Departement Of Water And Power (ca) | 1.02% |
GWMIX Prospectus and SEC Filings
Official AMG GW&K Municipal Bond Fund filings on SEC EDGAR — prospectus, portfolio holdings and annual reports.
- Prospectus (485BPOS) — filed 2026-04-30
- Prospectus (485BPOS) — filed 2025-04-30
- Prospectus (485BPOS) — filed 2024-04-29
- Portfolio holdings (N-PORT) — filed 2026-08-28
- Portfolio holdings (N-PORT) — filed 2026-06-01
- Portfolio holdings (N-PORT) — filed 2026-02-25
- Annual census (N-CEN) — filed 2026-03-16
- Annual census (N-CEN) — filed 2025-03-17
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.