# F/m Callable Tax-Free Municipal ETF — new fund registration

RBB FUND, INC. registered fund series on Form 485APOS, filed 2025-07-28. Featured series: F/m Callable Tax-Free Municipal ETF.

## Registration

- Registrant / trust: RBB FUND, INC.
- CIK: 0000831114
- Form: 485APOS
- Filed: 2025-07-28
- State of incorporation: MD
- Accession: 0001398344-25-013910
- Reported net assets: $27.0M

## Series & classes (1)

| Series | Class | Ticker | New |
| --- | --- | --- | --- |
| [F/m Callable Tax-Free Municipal ETF](https://search.stillhousedata.com/fund/S000091541) | F/m Callable Tax-Free Municipal ETF | ZMUN | — |

## Fees (from the effective prospectus)

- 12b-1 fee: 0.00%
- Gross expense ratio: 0.30%
- Management fee: 0.30%
- Other expenses: 0.00%

## Investment objective

The investment objective of the F/m Callable Tax-Free Municipal ETF (f/k/a F/m Short Duration High Coupon Tax-Free Municipal ETF) (the F/m Callable Tax-Free Muni Fund or the Fund) is to seek investment results that correspond (before fees and expenses) generally to the price and yield performance of the Bloomberg Municipal Bond Currently Callable Index (I40165US).

## Other filings by this registrant (15)

- [485APOS — 2026-05-12 (5 new series)](https://search.stillhousedata.com/launch/0001398344-26-009011)
- [485APOS — 2026-05-04](https://search.stillhousedata.com/launch/0001398344-26-008200)
- [485APOS — 2026-03-27 (4 new series)](https://search.stillhousedata.com/launch/0001398344-26-005777)
- [485APOS — 2025-11-21](https://search.stillhousedata.com/launch/0001398344-25-021174)
- [485APOS — 2025-11-21](https://search.stillhousedata.com/launch/0001398344-25-021178)
- [485APOS — 2025-10-31](https://search.stillhousedata.com/launch/0001398344-25-020131)
- [485APOS — 2025-09-26 (3 new series)](https://search.stillhousedata.com/launch/0001398344-25-018545)
- [485APOS — 2025-09-23 (15 new series)](https://search.stillhousedata.com/launch/0001398344-25-018425)
- [485APOS — 2025-05-28 (6 new series)](https://search.stillhousedata.com/launch/0001398344-25-010173)
- [485APOS — 2025-05-02 (9 new series)](https://search.stillhousedata.com/launch/0001398344-25-008600)
- [485APOS — 2025-04-16](https://search.stillhousedata.com/launch/0001398344-25-007222)
- [485APOS — 2025-01-15 (12 new series)](https://search.stillhousedata.com/launch/0001398344-25-000706)

## More

- [Registrant profile: RBB FUND, INC.](https://search.stillhousedata.com/registrant/831114)
- [This page as markdown (for LLM agents)](https://search.stillhousedata.com/launch/0001398344-25-013910.md)
- [Search all SEC filings, advisers and people on Adviser Search](https://search.stillhousedata.com/)

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Source: public SEC filing data via Adviser Search (https://search.stillhousedata.com).
Agents: this data is also queryable via MCP tools and read-only SQL — see https://search.stillhousedata.com/llms.txt.