# EDGAR Filing Document

**Accession Number:** 0000100334
**File Stem:** 0001410368-25-041805
**Filing Date:** 2025-12
**Character Count:** 10286
**Document Hash:** c4aa73f1123149b974014babeeb079fa
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001410368-25-041805.hdr.sgml**: 20251223

**ACCESSION NUMBER**: 0001410368-25-041805

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

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20251031

**FILED AS OF DATE**: 20251223

**DATE AS OF CHANGE**: 20251223

**EFFECTIVENESS DATE**: 20251223

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** AMERICAN CENTURY MUTUAL FUNDS, INC.
- **CENTRAL INDEX KEY:** 0000100334

**ORGANIZATION NAME:**
- **EIN:** 446006315
- **STATE OF INCORPORATION:** MD
- **FISCAL YEAR END:** 1031

**FILING VALUES:**
- **FORM TYPE:** 24F-2NT
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 002-14213
- **FILM NUMBER:** 251596335

**BUSINESS ADDRESS:**
- **STREET 1:** 4500 MAIN STREET
- **CITY:** KANSAS CITY
- **STATE:** MO
- **ZIP:** 64111
- **BUSINESS PHONE:** 816-531-5575

**MAIL ADDRESS:**
- **STREET 1:** 4500 MAIN STREET
- **CITY:** KANSAS CITY
- **STATE:** MO
- **ZIP:** 64111

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** AMERICAN CENTURY MUTUAL FUNDS INC
- **DATE OF NAME CHANGE:** 19970107

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** TWENTIETH CENTURY INVESTORS INC
- **DATE OF NAME CHANGE:** 19920703

## Series and Classes Contracts Data

### BALANCED FUND (Series ID: S000006192)

---

|  |  |  |
|:---|:---|:---|
| Class Name     | Ticker Symbol | Class ID   |
| INVESTOR CLASS | TWBIX         | C000017045 |
| I CLASS        | ABINX         | C000017047 |
| R5 CLASS       | ABGNX         | C000189734 |

---

### SMALL CAP GROWTH FUND (Series ID: S000006193)

---

|  |  |  |
|:---|:---|:---|
| Class Name     | Ticker Symbol | Class ID   |
| I CLASS        | ANONX         | C000017048 |
| INVESTOR CLASS | ANOIX         | C000017049 |
| A CLASS        | ANOAX         | C000017050 |
| C CLASS        | ANOCX         | C000017052 |
| R CLASS        | ANORX         | C000055516 |
| R6 CLASS       | ANODX         | C000131596 |
| R5 CLASS       | ANOGX         | C000189735 |
| Y CLASS        | ANOYX         | C000189736 |
| G Class        | ANOHX         | C000212512 |

---

### SELECT FUND (Series ID: S000006194)

---

|  |  |  |
|:---|:---|:---|
| Class Name     | Ticker Symbol | Class ID   |
| INVESTOR CLASS | TWCIX         | C000017053 |
| A CLASS        | TWCAX         | C000017054 |
| I CLASS        | TWSIX         | C000017055 |
| C CLASS        | ACSLX         | C000017058 |
| R CLASS        | ASERX         | C000017059 |
| R6 CLASS       | ASDEX         | C000131597 |
| R5 CLASS       | ASLGX         | C000189737 |
| Y CLASS        | ASLWX         | C000189738 |
| G Class        | ASLDX         | C000247666 |

---

### ULTRA FUND (Series ID: S000006195)

---

|  |  |  |
|:---|:---|:---|
| Class Name     | Ticker Symbol | Class ID   |
| INVESTOR CLASS | TWCUX         | C000017060 |
| A CLASS        | TWUAX         | C000017061 |
| I CLASS        | TWUIX         | C000017062 |
| C CLASS        | TWCCX         | C000017063 |
| R CLASS        | AULRX         | C000017064 |
| R6 CLASS       | AULDX         | C000131598 |
| R5 CLASS       | AULGX         | C000189739 |
| Y CLASS        | AULYX         | C000189740 |
| G Class        | AULNX         | C000214991 |

---

### LARGE CAP EQUITY FUND (Series ID: S000006203)

---

|  |  |  |
|:---|:---|:---|
| Class Name     | Ticker Symbol | Class ID   |
| INVESTOR CLASS | AFDIX         | C000017094 |
| I CLASS        | AFEIX         | C000017095 |
| A CLASS        | AFDAX         | C000017096 |
| C CLASS        | AFDCX         | C000017098 |
| R CLASS        | AFDRX         | C000017099 |
| R5 CLASS       | AFDGX         | C000189741 |
| Y CLASS        | AFYDX         | C000189742 |
| G Class        | AFEGX         | C000212513 |
| R6 Class       | AFEDX         | C000212514 |

---

### GROWTH FUND (Series ID: S000006205)

---

|  |  |  |
|:---|:---|:---|
| Class Name     | Ticker Symbol | Class ID   |
| INVESTOR CLASS | TWCGX         | C000017101 |
| A CLASS        | TCRAX         | C000017102 |
| I CLASS        | TWGIX         | C000017103 |
| R CLASS        | AGWRX         | C000017105 |
| C CLASS        | TWRCX         | C000088050 |
| R6 CLASS       | AGRDX         | C000131599 |
| R5 CLASS       | AGWUX         | C000189743 |
| Y CLASS        | AGYWX         | C000189744 |
| G Class        | ACIHX         | C000236113 |

---

### HERITAGE FUND (Series ID: S000006206)

---

|  |  |  |
|:---|:---|:---|
| Class Name     | Ticker Symbol | Class ID   |
| INVESTOR CLASS | TWHIX         | C000017106 |
| A CLASS        | ATHAX         | C000017107 |
| I CLASS        | ATHIX         | C000017108 |
| C CLASS        | AHGCX         | C000017109 |
| R CLASS        | ATHWX         | C000055524 |
| R6 CLASS       | ATHDX         | C000129042 |
| R5 CLASS       | ATHGX         | C000189745 |
| Y CLASS        | ATHYX         | C000189746 |
| G Class        | ACILX         | C000236114 |

---

## Series and Classes Contracts Data

### BALANCED FUND (Series ID: S000006192)

| Class ID   | Class Name     | Ticker Symbol   |
|:---|:---|:---|
| C000017045 | INVESTOR CLASS | TWBIX           |
| C000017047 | I CLASS        | ABINX           |
| C000189734 | R5 CLASS       | ABGNX           |

### SMALL CAP GROWTH FUND (Series ID: S000006193)

| Class ID   | Class Name     | Ticker Symbol   |
|:---|:---|:---|
| C000017048 | I CLASS        | ANONX           |
| C000017049 | INVESTOR CLASS | ANOIX           |
| C000017050 | A CLASS        | ANOAX           |
| C000017052 | C CLASS        | ANOCX           |
| C000055516 | R CLASS        | ANORX           |
| C000131596 | R6 CLASS       | ANODX           |
| C000189735 | R5 CLASS       | ANOGX           |
| C000189736 | Y CLASS        | ANOYX           |
| C000212512 | G Class        | ANOHX           |

### SELECT FUND (Series ID: S000006194)

| Class ID   | Class Name     | Ticker Symbol   |
|:---|:---|:---|
| C000017053 | INVESTOR CLASS | TWCIX           |
| C000017054 | A CLASS        | TWCAX           |
| C000017055 | I CLASS        | TWSIX           |
| C000017058 | C CLASS        | ACSLX           |
| C000017059 | R CLASS        | ASERX           |
| C000131597 | R6 CLASS       | ASDEX           |
| C000189737 | R5 CLASS       | ASLGX           |
| C000189738 | Y CLASS        | ASLWX           |
| C000247666 | G Class        | ASLDX           |

### ULTRA FUND (Series ID: S000006195)

| Class ID   | Class Name     | Ticker Symbol   |
|:---|:---|:---|
| C000017060 | INVESTOR CLASS | TWCUX           |
| C000017061 | A CLASS        | TWUAX           |
| C000017062 | I CLASS        | TWUIX           |
| C000017063 | C CLASS        | TWCCX           |
| C000017064 | R CLASS        | AULRX           |
| C000131598 | R6 CLASS       | AULDX           |
| C000189739 | R5 CLASS       | AULGX           |
| C000189740 | Y CLASS        | AULYX           |
| C000214991 | G Class        | AULNX           |

### LARGE CAP EQUITY FUND (Series ID: S000006203)

| Class ID   | Class Name     | Ticker Symbol   |
|:---|:---|:---|
| C000017094 | INVESTOR CLASS | AFDIX           |
| C000017095 | I CLASS        | AFEIX           |
| C000017096 | A CLASS        | AFDAX           |
| C000017098 | C CLASS        | AFDCX           |
| C000017099 | R CLASS        | AFDRX           |
| C000189741 | R5 CLASS       | AFDGX           |
| C000189742 | Y CLASS        | AFYDX           |
| C000212513 | G Class        | AFEGX           |
| C000212514 | R6 Class       | AFEDX           |

### GROWTH FUND (Series ID: S000006205)

| Class ID   | Class Name     | Ticker Symbol   |
|:---|:---|:---|
| C000017101 | INVESTOR CLASS | TWCGX           |
| C000017102 | A CLASS        | TCRAX           |
| C000017103 | I CLASS        | TWGIX           |
| C000017105 | R CLASS        | AGWRX           |
| C000088050 | C CLASS        | TWRCX           |
| C000131599 | R6 CLASS       | AGRDX           |
| C000189743 | R5 CLASS       | AGWUX           |
| C000189744 | Y CLASS        | AGYWX           |
| C000236113 | G Class        | ACIHX           |

### HERITAGE FUND (Series ID: S000006206)

| Class ID   | Class Name     | Ticker Symbol   |
|:---|:---|:---|
| C000017106 | INVESTOR CLASS | TWHIX           |
| C000017107 | A CLASS        | ATHAX           |
| C000017108 | I CLASS        | ATHIX           |
| C000017109 | C CLASS        | AHGCX           |
| C000055524 | R CLASS        | ATHWX           |
| C000129042 | R6 CLASS       | ATHDX           |
| C000189745 | R5 CLASS       | ATHGX           |
| C000189746 | Y CLASS        | ATHYX           |
| C000236114 | G Class        | ACILX           |

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

### 24F-2NT: Filer Information

**Filer CIK:** 0000100334

**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:** American Century Mutual Funds, Inc.

- **Address:** 4500 Main Street, Kansas City, MO 64111

**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:** 811-00816

   **Securities Act File Number:** 002-14213

**4(a). Last day of fiscal year for which this Form is filed:** 10/31/2025

**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:** $8713438101.00

- **(ii) Aggregate price of securities redeemed or repurchased during the fiscal year:** $12941935767.00

- **(iii) Aggregate price of securities redeemed or repurchased during any prior fiscal year:** $19674097927.00

- **(iv) Total available redemption credits [add Items 5(ii) and 5(iii)]:** $32616033694.00

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

- **(vi) Redemption credits available for use in future years:** $-23902595593.00

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

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

**Signatures**

**Name and Title:** Assistant Treasurer

**Date:** 12/19/2025

**Signature:** Amy R. Bitter