CTMRX — Columbia AMT-Free Intermediate Muni Bond Fund
Data updated: 2026-06-25
CTMRX — Columbia AMT-Free Intermediate Muni Bond Fund data: holdings, portfolio allocation, expenses, performance, cashflows, risk and SEC filings. Long Municipal - National Bond · $1.50B AUM · 0.34% expense ratio · 5.6% 1-yr return. From SEC regulatory filings.
CTMRX Fund Overview
CTMRX — Columbia AMT-Free Intermediate Muni Bond Fund is a US mutual fund managed by Columbia Funds Series Trust I, 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: Columbia Funds Series Trust I
- Category: Long Municipal - National Bond
- Assets under management: $1.50B
- 1-year return: 5.6%
- Ticker: CTMRX
- SEC CIK: 0000773757
- SEC series ID: S000010623
- Share class ID: C000122658
CTMRX Holdings
Top 10 holdings of Columbia AMT-Free Intermediate Muni Bond Fund by percentage of net assets, from the fund's latest SEC N-PORT filing.
| Holding | % of net assets |
|---|---|
| Rancho Santiago Calif Cmnty College Dist | 1.59% |
| Main Street Natural Gas Inc | 0.98% |
| San Francisco City & County Airport Comm-San Francisco International Airport | 0.92% |
| California Community Choice Financing Authority | 0.84% |
| Omaha Pub Pwr Dist Neb | 0.77% |
| Houston Higher Education Finance Corp | 0.77% |
| Southeast Energy Authority A Cooperative District | 0.71% |
| Commonwealth of Massachusetts | 0.69% |
| City of Chicago IL | 0.67% |
| State of Maryland | 0.67% |
CTMRX Portfolio Allocation
Asset-class allocation of Columbia AMT-Free Intermediate Muni Bond Fund by percentage of net assets, from the latest SEC N-PORT filing.
| Asset class | Allocation |
|---|---|
| Fixed Income | 99.1% |
CTMRX Performance
Total returns for CTMRX (as of 2026-08-01), from SEC filings.
| Period | Total return |
|---|---|
| YTD | 0.9% |
| 1 year | 5.6% |
| 3 years (annualised) | 3.7% |
| 5 years (annualised) | 1.3% |
CTMRX Risk Information
Risk metrics for CTMRX, derived from monthly returns in SEC filings.
- 1-year volatility (annualised): 3.0%
CTMRX Costs and Fees
CTMRX costs about $34 per $10,000 invested per year in fund expenses.
- Net expense ratio: 0.34%
- Gross expense ratio: 0.55%
- Portfolio turnover: 14%
- Brokerage commissions: 0.00 bps of average net assets (SEC N-CEN)
CTMRX Cashflows
Over the 12 months to 2026-04, Columbia AMT-Free Intermediate Muni Bond Fund had net outflows of $44.13M, from monthly SEC N-PORT filings.
| Month | Net flow |
|---|---|
| 2026-04 | −$2.21M |
| 2026-03 | −$2.29M |
| 2026-02 | −$7.87M |
| 2026-01 | −$3.53M |
| 2025-12 | −$4.85M |
| 2025-11 | −$17.75K |
CTMRX Debt Constituents
Largest debt holdings of Columbia AMT-Free Intermediate Muni Bond Fund by percentage of net assets, from the latest SEC N-PORT filing.
| Debt holding | % of net assets |
|---|---|
| Rancho Santiago Calif Cmnty College Dist | 1.59% |
| Main Street Natural Gas Inc | 0.98% |
| San Francisco City & County Airport Comm-San Francisco International Airport | 0.92% |
| California Community Choice Financing Authority | 0.84% |
| Omaha Pub Pwr Dist Neb | 0.77% |
| Houston Higher Education Finance Corp | 0.77% |
| Southeast Energy Authority A Cooperative District | 0.71% |
| Commonwealth of Massachusetts | 0.69% |
| City of Chicago IL | 0.67% |
| State of Maryland | 0.67% |
CTMRX Prospectus and SEC Filings
Official Columbia AMT-Free Intermediate Muni Bond Fund filings on SEC EDGAR — prospectus, portfolio holdings and annual reports.
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.