# UBS Ultra Short Income Fund — new fund registration

UBS Series Funds registered 1 new fund series on Form 485APOS, filed 2018-03-09. Featured series: UBS Ultra Short Income Fund.

## Registration

- Registrant / trust: UBS Series Funds
- CIK: 0001060517
- Form: 485APOS
- Filed: 2018-03-09
- State of incorporation: DE
- Accession: 0001193125-18-077501
- Reported net assets: $294.0M

## Series & classes (3)

| Series | Class | Ticker | New |
| --- | --- | --- | --- |
| [UBS Ultra Short Income Fund](https://search.stillhousedata.com/fund/S000061955) | Class A | USIAX | Yes |
| [UBS Ultra Short Income Fund](https://search.stillhousedata.com/fund/S000061955) | Class P | USIPX | Yes |
| [UBS Ultra Short Income Fund](https://search.stillhousedata.com/fund/S000061955) | Class I | USDIX | Yes |

## Fees (from the effective prospectus)

- 12b-1 fee: 0.10%
- Gross expense ratio: 0.53%
- Management fee: 0.20%
- Net expense ratio: 0.35%
- Other expenses: 0.23%

## Investment objective

To provide current income while seeking to maintain low volatility of principal.

## Advisers

- [UBS Asset Management (Americas) LLC (Advisor)](https://search.stillhousedata.com/firm/106838)

## Other filings by this registrant (15)

- [485APOS — 2026-05-29 (3 new series)](https://search.stillhousedata.com/launch/0001193125-26-248454)
- [485APOS — 2025-11-26](https://search.stillhousedata.com/launch/0001193125-25-300561)
- [485APOS — 2024-01-22](https://search.stillhousedata.com/launch/0001193125-24-012234)
- [485APOS — 2023-12-26 (2 new series)](https://search.stillhousedata.com/launch/0001193125-23-302829)
- [485APOS — 2023-09-29 (1 new series)](https://search.stillhousedata.com/launch/0001193125-23-247319)
- [485APOS — 2019-10-15 (3 new series)](https://search.stillhousedata.com/launch/0001193125-19-267798)
- [485APOS — 2016-06-23](https://search.stillhousedata.com/launch/0001193125-16-630206)
- [485APOS — 2015-12-30 (5 new series)](https://search.stillhousedata.com/launch/0001193125-15-417634)
- [485APOS — 2015-10-16 (3 new series)](https://search.stillhousedata.com/launch/0001193125-15-345801)
- [485APOS — 2012-06-29](https://search.stillhousedata.com/launch/0001206774-12-002855)
- [485APOS — 2011-06-29](https://search.stillhousedata.com/launch/0001104659-11-037077)
- [485APOS — 2010-06-24](https://search.stillhousedata.com/launch/0001209286-10-000299)

## More

- [Registrant profile: UBS Series Funds](https://search.stillhousedata.com/registrant/1060517)
- [This page as markdown (for LLM agents)](https://search.stillhousedata.com/launch/0001193125-18-077501.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.