# EDGAR Filing Document

**Accession Number:** 0001062806
**File Stem:** 0000940400-25-000366
**Filing Date:** 2025-8
**Character Count:** 3674
**Document Hash:** 78d38777c3ab27924d5a68620b05281f
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0000940400-25-000366.hdr.sgml**: 20250827

**ACCESSION NUMBER**: 0000940400-25-000366

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

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20250531

**FILED AS OF DATE**: 20250827

**DATE AS OF CHANGE**: 20250827

**EFFECTIVENESS DATE**: 20250827

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** BLACKROCK SERIES, INC.
- **CENTRAL INDEX KEY:** 0001062806

**ORGANIZATION NAME:**
- **EIN:** 000000000
- **STATE OF INCORPORATION:** MD
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 24F-2NT
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 333-56203
- **FILM NUMBER:** 251263100

**BUSINESS ADDRESS:**
- **STREET 1:** 100 BELLEVUE PARKWAY
- **CITY:** WILMINGTON
- **STATE:** DE
- **ZIP:** 09809
- **BUSINESS PHONE:** 800-441-7762

**MAIL ADDRESS:**
- **STREET 1:** 100 BELLEVUE PARKWAY
- **CITY:** WILMINGTON
- **STATE:** DE
- **ZIP:** 09809

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** MERCURY FUNDS INC
- **DATE OF NAME CHANGE:** 20010827

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** MERCURY ASSET MANAGEMENT FUNDS INC
- **DATE OF NAME CHANGE:** 19980714

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** MERCURY ALPHA FUND INC
- **DATE OF NAME CHANGE:** 19980601

## Series and Classes Contracts Data

### BlackRock International Fund (Series ID: S000002291)

---

|  |  |
|:---|:---|
| Class Name     | Class ID   |
| Investor A     | C000005981 |
| Investor C     | C000005983 |
| Institutional  | C000005984 |
| Class R Shares | C000101856 |
| Class K        | C000198221 |

---

## Series and Classes Contracts Data

### BlackRock International Fund (Series ID: S000002291)

| Class ID   | Class Name     | Ticker Symbol   |
|:---|:---|:---|
| C000005981 | Investor A     |  |
| C000005983 | Investor C     |  |
| C000005984 | Institutional  |  |
| C000101856 | Class R Shares |  |
| C000198221 | Class K        |  |

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

### 24F-2NT: Filer Information

**Filer CIK:** 0001062806

**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:** BlackRock Series, Inc.

- **Address:** 100 Bellevue Parkway, Wilmington, DE 19809

**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:** 811-08797

   **Securities Act File Number:** 333-56203

**4(a). Last day of fiscal year for which this Form is filed:** 05/31/2025

**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:** $279991270.93

- **(ii) Aggregate price of securities redeemed or repurchased during the fiscal year:** $834472193.00

- **(iii) Aggregate price of securities redeemed or repurchased during any prior fiscal year:** $611003416.07

- **(iv) Total available redemption credits [add Items 5(ii) and 5(iii)]:** $1445475609.07

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

- **(vi) Redemption credits available for use in future years:** $-1165484338.14

- **(vii) Multiplier for determining registration fee:** 0.0001531

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

**Explanatory Notes (if any):**
N/A

**Signatures**

**Name and Title:** Chuck Pulsfort, Assistant Treasurer

**Date:** 08/25/2025

**Signature:** Chuck Pulsfort