# EDGAR Filing Document

**Accession Number:** 0000319108
**File Stem:** 0001193125-25-287138
**Filing Date:** 2025-11
**Character Count:** 6778
**Document Hash:** a86a6de697c362b94cf7250196c23c97
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-25-287138.hdr.sgml**: 20251119

**ACCESSION NUMBER**: 0001193125-25-287138

**CONFORMED SUBMISSION TYPE**: 497

**PUBLIC DOCUMENT COUNT**: 11

**FILED AS OF DATE**: 20251119

**DATE AS OF CHANGE**: 20251119

**EFFECTIVENESS DATE**: 20251119

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** BlackRock Series Fund, Inc.
- **CENTRAL INDEX KEY:** 0000319108

**ORGANIZATION NAME:**
- **EIN:** 133051800
- **STATE OF INCORPORATION:** MD
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 497
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 002-69062
- **FILM NUMBER:** 251496804

**BUSINESS ADDRESS:**
- **STREET 1:** 100 BELEVUE PARKWAY
- **CITY:** WILMINGTON
- **STATE:** DE
- **ZIP:** 19809
- **BUSINESS PHONE:** 800-441-7762

**MAIL ADDRESS:**
- **STREET 1:** 100 BELEVUE PARKWAY
- **CITY:** WILMINGTON
- **STATE:** DE
- **ZIP:** 19809

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** FAM Series Fund, Inc.
- **DATE OF NAME CHANGE:** 20050720

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** MERRILL LYNCH SERIES FUNDS INC
- **DATE OF NAME CHANGE:** 20000229

## Series and Classes Contracts Data

### BlackRock Capital Appreciation Portfolio (Series ID: S000003867)

---

|  |  |
|:---|:---|
| Class Name                               | Class ID   |
| BlackRock Capital Appreciation Portfolio | C000010833 |

---

## Series and Classes Contracts Data

### BlackRock Capital Appreciation Portfolio (Series ID: S000003867)

| Class ID   | Class Name                               | Ticker Symbol   |
|:---|:---|:---|
| C000010833 | BlackRock Capital Appreciation Portfolio |  |

?xml version='1.0' encoding='ASCII'? BlackRock Capital Appreciation Portfolio

------

#### BLACKROCK SERIES FUND, INC.
BlackRock Capital Appreciation Portfolio

(the "Fund")

#### Supplement dated November 19, 2025 (the "Supplement") to the Fund's

#### Prospectus, dated May 1, 2025, as amended or supplemented to date

#### Effective immediately, the following changes are made to the Fund's Prospectus:
**The fourth paragraph of the section of the Prospectus entitled "Fund Overview — Key Facts About BlackRock Capital Appreciation Portfolio — Principal Investment Strategies of the Fund" is deleted in its entirety and replaced with the following:** 

The Fund may invest in companies of any size but emphasizes investments in companies that have large stock market capitalizations (currently, approximately $2 billion or more).

**The section of the Prospectus entitled "Fund Overview — Key Facts About BlackRock Capital Appreciation Portfolio— Portfolio Managers" is deleted in its entirety and replaced with the following:** 

#### Portfolio Managers

---

| | | |
|:---|:---|:---|
| **Portfolio Manager** | **Portfolio Manager of<br>the Fund Since** | **Title** |
| Sally Du, CFA | 2025 | Director of BlackRock, Inc. |
| Reid Menge | 2025 | Managing Director of BlackRock, Inc. |

---

**The section of the Prospectus entitled "Details About the Fund — How the Fund Invests — Investment Process" is deleted in its entirety and replaced with the following:** 

#### Investment Process
Fund management seeks to identify long-term, structural investment themes that are reshaping the global economy. Within these themes, management looks to invest in fundamentally sound companies that have above-average return potential based on factors such as revenue and earnings growth, estimate revisions, profitability and relative value. The factors and the weight assigned to a factor may change depending on market conditions. The disciplined investment process uses bottom-up stock selection as the primary driver of returns, while incorporating quantitative tools to enhance decision-making. The Fund emphasizes large companies that exhibit above-average growth and accelerating earnings.

When constructing the portfolio, the Fund uses a quantitative, optimization-assisted process that considers the risk and factor profile of individual securities. This supports the portfolio managers in the construction of a portfolio that expresses the highest conviction stock-specific views while mitigating style and macro exposure.

While the Fund generally expects to invest across a broad range of industries, it may favor companies in those industries that appear to offer higher potential for long-term growth.

The Fund generally will sell a stock when, in the Fund management team's opinion, the stock reaches its price target, there is a deterioration in the company's future growth prospects, an inability to sustain earnings momentum, less attractive valuation, a significant price change or more compelling investment opportunities elsewhere.

------

**The fourth paragraph of the section of the Prospectus entitled "Details About the Fund — How the Fund Invests — Principal Investment Strategies" is deleted in its entirety and replaced with the following:** 

The Fund may invest in companies of any size but emphasizes investments in companies that have large stock market capitalizations (currently, approximately $2 billion or more).

**The section of the Prospectus entitled "Details About the Fund — How the Fund Invests — About the Portfolio Management Team of the Fund" is deleted in its entirety and replaced with the following:** 

---

| |
|:---|
| &nbsp;&nbsp;&nbsp;**ABOUT THE PORTFOLIO MANAGEMENT TEAM OF THE FUND** |
| &nbsp;&nbsp;&nbsp;The Fund is managed by a team of financial professionals. Sally Du, CFA, and Reid Menge are the portfolio managers and are jointly and primarily responsible for the day-to-day management of the Fund. Please see "Management of the Fund — Portfolio Manager Information" for additional information about the portfolio management team. |

---

**The section of the Prospectus entitled "Management of the Funds — Portfolio Manager Information — Capital Appreciation Portfolio" is deleted in its entirety and replaced with the following:** 

#### Capital Appreciation Portfolio

---

| | | | |
|:---|:---|:---|:---|
| **Portfolio Manager** | **Primary Role** | **Since** | **Title and Recent Biography** |
| Sally Du, CFA | Jointly and primarily responsible for the day-to-day management of the Fund's portfolio, including setting the Fund's overall investment strategy and overseeing the management of the Fund. | 2025 | Director of BlackRock, Inc. since 2019. |
| Reid Menge | Jointly and primarily responsible for<br> the day-to-day management of the<br> Fund's portfolio, including setting the<br> Fund's overall investment strategy<br> and overseeing the management of<br> the Fund. | 2025 | Managing Director of BlackRock, Inc. since 2023; Director of BlackRock, Inc. from 2020 to 2022. |

---

#### Shareholders should retain this Supplement for future reference.