# EDGAR Filing Document

**Accession Number:** 0000732697
**File Stem:** 0001753926-26-000755
**Filing Date:** 2026-5
**Character Count:** 5085
**Document Hash:** 1a67d72ae842308ecf055f492d5c6451
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001753926-26-000755.hdr.sgml**: 20260501

**ACCESSION NUMBER**: 0001753926-26-000755

**CONFORMED SUBMISSION TYPE**: 497J

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20260501

**DATE AS OF CHANGE**: 20260501

**EFFECTIVENESS DATE**: 20260501

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** ULTRA SERIES FUND
- **CENTRAL INDEX KEY:** 0000732697

**ORGANIZATION NAME:**
- **EIN:** 392004659
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 497J
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 002-87775
- **FILM NUMBER:** 26928964

**BUSINESS ADDRESS:**
- **STREET 1:** 550 SCIENCE DRIVE
- **CITY:** MADISON
- **STATE:** WI
- **ZIP:** 53711
- **BUSINESS PHONE:** 6082740300

**MAIL ADDRESS:**
- **STREET 1:** 550 SCIENCE DRIVE
- **CITY:** MADISON
- **STATE:** WI
- **ZIP:** 53711

## Series and Classes Contracts Data

### Madison Target Retirement 2020 Fund (Series ID: S000019110)

| Class ID   | Class Name                                  | Ticker Symbol   |
|:---|:---|:---|
| C000052853 | Madison Target Retirement 2020 Fund Class I |  |

### Madison Target Retirement 2030 Fund (Series ID: S000019111)

| Class ID   | Class Name                                  | Ticker Symbol   |
|:---|:---|:---|
| C000052854 | Madison Target Retirement 2030 Fund Class I |  |

### Madison Target Retirement 2040 Fund (Series ID: S000019112)

| Class ID   | Class Name                                  | Ticker Symbol   |
|:---|:---|:---|
| C000052855 | Madison Target Retirement 2040 Fund Class I |  |

### Core Bond Fund (Series ID: S000019978)

| Class ID   | Class Name              | Ticker Symbol   |
|:---|:---|:---|
| C000056036 | Core Bond Fund Class I  |  |
| C000074783 | Core Bond Fund Class II |  |

### Diversified Income Fund (Series ID: S000019980)

| Class ID   | Class Name                       | Ticker Symbol   |
|:---|:---|:---|
| C000056038 | Diversified Income Fund Class I  |  |
| C000074785 | Diversified Income Fund Class II |  |

### Large Cap Value Fund (Series ID: S000019981)

| Class ID   | Class Name                    | Ticker Symbol   |
|:---|:---|:---|
| C000056039 | Large Cap Value Fund Class I  |  |
| C000074786 | Large Cap Value Fund Class II |  |

### Large Cap Growth Fund (Series ID: S000019982)

| Class ID   | Class Name                     | Ticker Symbol   |
|:---|:---|:---|
| C000056040 | Large Cap Growth Fund Class I  |  |
| C000074787 | Large Cap Growth Fund Class II |  |

### Mid Cap Fund (Series ID: S000019983)

| Class ID   | Class Name            | Ticker Symbol   |
|:---|:---|:---|
| C000056041 | Mid Cap Fund Class I  |  |
| C000074788 | Mid Cap Fund Class II |  |

### Conservative Allocation Fund (Series ID: S000019999)

| Class ID   | Class Name                            | Ticker Symbol   |
|:---|:---|:---|
| C000056077 | Conservative Allocation Fund Class I  |  |
| C000074791 | Conservative Allocation Fund Class II |  |

### Aggressive Allocation Fund (Series ID: S000020000)

| Class ID   | Class Name                          | Ticker Symbol   |
|:---|:---|:---|
| C000056078 | Aggressive Allocation Fund Class I  |  |
| C000074792 | Aggressive Allocation Fund Class II |  |

### Moderate Allocation Fund (Series ID: S000020001)

| Class ID   | Class Name                        | Ticker Symbol   |
|:---|:---|:---|
| C000056079 | Moderate Allocation Fund Class I  |  |
| C000074793 | Moderate Allocation Fund Class II |  |

### Madison Target Retirement 2050 Fund (Series ID: S000030254)

| Class ID   | Class Name                                  | Ticker Symbol   |
|:---|:---|:---|
| C000093111 | Madison Target Retirement 2050 Fund Class I |  |

Ultra Series Fund

550 Science Drive

Madison, WI 53711

608-216-9109

May 1, 2026

BY EDGAR

Securities and Exchange Commission

100 F Street, NE

Washington, DC 20549

RE: Ultra Series Fund (SEC File Nos. 002-87775; 811-04815) Rule 497(j) Filing

Ladies and Gentlemen:

In lieu of filing the form of Prospectus and the form of Statement of Additional Information which will be used by the Ultra Series Fund (the "Company") after the effective date of the most recently filed post-effective amendment to the Company's Registration Statement on Form N-1A as required by Rule 497(c) under the Securities Act of 1933, as amended, in accordance with Rule 497(j) under such Act, we hereby provide you with notice that (1) the form of Prospectus and the form of Statement of Additional Information for the Company that would have been filed under Rule 497(c) by the Company would not have differed from the Prospectus and Statement of Additional Information contained in the Company's most recently filed post-effective amendment and (2) the text of the Company's most recently filed post-effective amendment was filed electronically via EDGAR and will become effective on May 1, 2025.

Please do not hesitate to contact me at 608-216-9109 if you have any questions regarding this letter.

Very truly yours,

/s/ Steven J. Fredricks

Steven J. Fredricks

Chief Legal Officer & Chief Compliance Officer