# EDGAR Filing Document

**Accession Number:** 0000732697
**File Stem:** 0001954889-26-000014
**Filing Date:** 2026-3
**Character Count:** 8185
**Document Hash:** 59d1e03d642ba6e2a1b4d62031de3b30
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001954889-26-000014.hdr.sgml**: 20260320

**ACCESSION NUMBER**: 0001954889-26-000014

**CONFORMED SUBMISSION TYPE**: 24F-2NT

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20251231

**FILED AS OF DATE**: 20260320

**DATE AS OF CHANGE**: 20260320

**EFFECTIVENESS DATE**: 20260320

**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:** 24F-2NT
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 002-87775
- **FILM NUMBER:** 26776820

**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 Name                                  | Class ID   |
| Madison Target Retirement 2020 Fund Class I | C000052853 |

---

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

---

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

---

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

---

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

---

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

---

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

---

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

---

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

---

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

---

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

---

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

---

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

---

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

---

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

---

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

---

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

---

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

---

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

---

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

---

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

---

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

---

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

---

## 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 |  |

## FORM 24F-2NT: Annual Notice of Securities Sold Pursuant to Rule 24f-2

### 24F-2NT: Filer Information

**Filer CIK:** 0000732697

**Is this a LIVE or TEST Filing?:** LIVE

**Filer Investment Company Type:** N-1A

### 24F-2NT: Annual Filing Information

**1. Name and address of issuer:**

- **Name of Issuer:** ULTRA SERIES FUND

- **Address:** 550 Science Drive, Madison, WI 53711

**2. The Name and EDGAR Identifier of each series or class of securities for which this Form is filed:**

- [ ] Check box if the Form is being filed for all series and classes of the issuer.

**3. Investment Company Act File Number:** 811-04815

   **Securities Act File Number:** 002-87775

**4(a). Last day of fiscal year for which this Form is filed:** 12/31/2025

**4(b). Check box if this Form is being filed late:** [ ]

**4(c). Check box if this is the last time the issuer will be filing this Form:** [ ]

**5. Calculation of registration fee:**

- **(i) Aggregate sale price of securities sold during the fiscal year:** $157164522.00

- **(ii) Aggregate price of securities redeemed or repurchased during the fiscal year:** $184758347.00

- **(iii) Aggregate price of securities redeemed or repurchased during any prior fiscal year:** $796224699.00

- **(iv) Total available redemption credits [add Items 5(ii) and 5(iii)]:** $980983046.00

- **(v) Net sales:** $0.00

- **(vi) Redemption credits available for use in future years:** $-823818524.00

- **(vii) Multiplier for determining registration fee:** 0.0001381

- **(viii) Registration fee due:** $0.00

**Signatures**

**Name and Title:** Greg Hoppe, Chief Financial Officer

**Date:** 03/02/2026

**Signature:** Greg Hoppe