# EDGAR Filing Document

**Accession Number:** 0001062806
**File Stem:** 0001752724-25-177010
**Filing Date:** 2025-7
**Character Count:** 17475
**Document Hash:** b2df6e5a266843b308284885462e542c
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001752724-25-177010.hdr.sgml**: 20250724

**ACCESSION NUMBER**: 0001752724-25-177010

**CONFORMED SUBMISSION TYPE**: NPORT-P

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20250530

**FILED AS OF DATE**: 20250724

**DATE AS OF CHANGE**: 20250724

**PERIOD START**: 20250531

**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:** NPORT-P
- **SEC ACT:** 1940 Act
- **SEC FILE NUMBER:** 811-08797
- **FILM NUMBER:** 251146619

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

## Form NPORT-P: Monthly Portfolio Investments Report

### NPORT-P: Part A: General Information

**Item A.1. Information about the Registrant.**

- **a. Name of Registrant:** BlackRock Series, Inc.

- **b. Investment Company Act file number:** 811-08797

- **c. CIK number of Registrant:** 0001062806

- **d. LEI of Registrant:** 549300NH38GBFL6FGA16

- **e. Address and telephone number of Registrant.**

  - **Street Address 1:** 100 Bellevue Parkway

  - **City:** Wilmington

  - **State:** DE

  - **Foreign country:** US

  - **Zip / Postal Code:** 19809

  - **Telephone number:** 800-441-7762

**Item A.2. Information about the Series.**

- **a. Name of Series:** BlackRock International Fund

- **b. EDGAR series identifier (if any):** S000002291

- **c. LEI of Series:** EQSGS63QMA8E5PBAP147

**Item A.3. Reporting period.**

- **a. Date of fiscal year-end:** 2025-05-31

- **b. Date as of which information is reported:** 2025-05-30

**Item A.4. Final filing**

Does the Fund anticipate that this will be its final filing on Form N-PORT? **No**

### Fund Information

**Total Assets:** $1205349131.82

**Total Liabilities:** $4806394.46

**Net Assets:** $1200542737.36

**Monthly Return Information**

| Class               | Month 1 Return (%)   | Month 2 Return (%)   | Month 3 Return (%)   |
|:---|:---|:---|:---|
| Class ID C000005981 | -5.36%               | 1.20%                | 4.01%                |
| Class ID C000005983 | -5.43%               | 1.14%                | 3.99%                |
| Class ID C000005984 | -5.37%               | 1.22%                | 4.05%                |
| Class ID C000101856 | -5.39%               | 1.14%                | 3.99%                |
| Class ID C000198221 | -5.37%               | 1.27%                | 4.00%                |

**Monthly Gains & Losses**

| Period   | Net Realized Gain/Loss   | Net Unrealized Appreciation/Depreciation   |
|:---|:---|:---|
| Month 1  | $19226544.34             | $-91579295.35                              |
| Month 2  | $1894719.84              | $7433064.35                                |
| Month 3  | $101977351.15            | $-57040792.63                              |

**Designated Index Information**

- **Index Name:** MSCI ACWI ex USA Index

- **Index Identifier:** NDUEACWZ

### Schedule of Portfolio Investments

| Name                             | Title                                     | Identifiers                                   | Payoff Profile   | Asset Category   | Issuer Category   | Country   |   Balance | Units   | Value (USD)   | % of Net Assets   | Maturity Date   | Coupon Type   | Annualized Rate (%)   | Restricted?   |   Fair Value Level | Lending Status   |
|:---|:---|:---|:---|:---|:---|:---|---:|:---|:---|:---|:---|:---|:---|:---|---:|:---|
| UBS Group AG                     | UBS Group AG                              | CUSIP: 000000000<br>LEI: 549300SZJ9VS8SGXAN81 | Long             | EC               | CORP              | CH        |    716811 | NS      | $22866658.48  | 1.90%             |  |  |  | No            |                  2 | On Loan: No      |
| Sanofi SA                        | Sanofi SA                                 | CUSIP: 000000000<br>LEI: 549300E9PC51EN656011 | Long             | EC               | CORP              | FR        |    271155 | NS      | $26855449.77  | 2.24%             |  |  |  | No            |                  2 | On Loan: No      |
| BlackRock Liquidity Funds T-Fund | BlackRock Liquidity Funds T-Fund          | CUSIP: 09248U718<br>LEI: 5493002L9DNZ83RX7V61 | Long             | STIV             | RF                | US        |  11465749 | NS      | $11465748.63  | 0.96%             |  |  |  | No            |                  1 | On Loan: No      |
| Haleon PLC                       | Haleon PLC                                | CUSIP: 000000000<br>LEI: 549300PSB3WWEODCUP19 | Long             | EC               | CORP              | GB        |   4477969 | NS      | $24997487.46  | 2.08%             |  |  |  | No            |                  2 | On Loan: No      |
| Axis Bank Ltd                    | Axis Bank Ltd                             | CUSIP: 000000000<br>LEI: 549300HVNWMJPOFVNI41 | Long             | EC               | CORP              | IN        |   1527424 | NS      | $21311141.00  | 1.78%             |  |  |  | No            |                  2 | On Loan: No      |
| TSMC                             | Taiwan Semiconductor Manufacturing Co Ltd | CUSIP: 000000000<br>LEI: 549300KB6NK5SBD14S87 | Long             | EC               | CORP              | TW        |   1935000 | NS      | $61714968.06  | 5.14%             |  |  |  | No            |                  2 | On Loan: No      |
| Taylor Wimpey PLC                | Taylor Wimpey PLC                         | CUSIP: 000000000<br>LEI: 21380089BTRXTD8S3R66 | Long             | EC               | CORP              | GB        |  11863434 | NS      | $19124980.78  | 1.59%             |  |  |  | No            |                  2 | On Loan: No      |
| Koninklijke KPN NV               | Koninklijke KPN NV                        | CUSIP: 000000000<br>LEI: 549300YO0JZHAL7FVP81 | Long             | EC               | CORP              | NL        |   8013206 | NS      | $37673814.31  | 3.14%             |  |  |  | No            |                  2 | On Loan: No      |
| Otis Worldwide Corp              | Otis Worldwide Corp                       | CUSIP: 68902V107<br>LEI: 549300ZLBKR8VSU25153 | Long             | EC               | CORP              | US        |    245692 | NS      | $23426732.20  | 1.95%             |  |  |  | No            |                  1 | On Loan: No      |
| British American Tobacco PLC     | British American Tobacco PLC              | CUSIP: 000000000<br>LEI: 213800FKA5MF17RJKT63 | Long             | EC               | CORP              | GB        |    433497 | NS      | $19515345.69  | 1.63%             |  |  |  | No            |                  2 | On Loan: No      |
| Waste Connections Inc            | Waste Connections Inc                     | CUSIP: 94106B101<br>LEI: 549300HDLRTPBQU69P29 | Long             | EC               | CORP              | CA        |    145566 | NS      | $28666642.74  | 2.39%             |  |  |  | No            |                  1 | On Loan: No      |
| HDFC Bank Ltd                    | HDFC Bank Ltd                             | CUSIP: 000000000<br>LEI: 335800ZQ6I4E2JXENC50 | Long             | EC               | CORP              | IN        |    955739 | NS      | $21810016.97  | 1.82%             |  |  |  | No            |                  2 | On Loan: No      |
| MediaTek Inc                     | MediaTek Inc                              | CUSIP: 000000000<br>LEI: 254900UEGBK1I4DM4E14 | Long             | EC               | CORP              | TW        |    392000 | NS      | $16094981.92  | 1.34%             |  |  |  | No            |                  2 | On Loan: No      |
| SAP SE                           | SAP SE                                    | CUSIP: 000000000<br>LEI: 529900D6BF99LW9R2E68 | Long             | EC               | CORP              | DE        |    121122 | NS      | $36641847.91  | 3.05%             |  |  |  | No            |                  2 | On Loan: No      |
| Keyence Corp                     | Keyence Corp                              | CUSIP: 000000000<br>LEI: 529900M7PQBS7A89DZ11 | Long             | EC               | CORP              | JP        |     68300 | NS      | $28588354.10  | 2.38%             |  |  |  | No            |                  2 | On Loan: No      |
| Air Liquide SA                   | Air Liquide SA                            | CUSIP: 000000000<br>LEI: 969500MMPQVHK671GT54 | Long             | EC               | CORP              | FR        |    199765 | NS      | $41393091.71  | 3.45%             |  |  |  | No            |                  2 | On Loan: No      |
| United Overseas Bank Ltd         | United Overseas Bank Ltd                  | CUSIP: 000000000<br>LEI: IO66REGK3RCBAMA8HR66 | Long             | EC               | CORP              | SG        |    788300 | NS      | $21654408.78  | 1.80%             |  |  |  | No            |                  2 | On Loan: No      |
| Industria de Diseno Textil SA    | Industria de Diseno Textil SA             | CUSIP: 000000000<br>LEI: 549300TTCXZOGZM2EY83 | Long             | EC               | CORP              | ES        |    494958 | NS      | $26814488.61  | 2.23%             |  |  |  | No            |                  2 | On Loan: No      |
| BBVA                             | Banco Bilbao Vizcaya Argentaria SA        | CUSIP: 000000000<br>LEI: K8MS7FD7N5Z2WQ51AZ71 | Long             | EC               | CORP              | ES        |   2368783 | NS      | $35560071.32  | 2.96%             |  |  |  | No            |                  2 | On Loan: No      |
| Atlas Copco AB                   | Atlas Copco AB                            | CUSIP: 000000000<br>LEI: 213800T8PC8Q4FYJZR07 | Long             | EC               | CORP              | SE        |   1621226 | NS      | $26041491.99  | 2.17%             |  |  |  | No            |                  2 | On Loan: No      |
| adidas AG                        | adidas AG                                 | CUSIP: 000000000<br>LEI: 549300JSX0Z4CW0V5023 | Long             | EC               | CORP              | DE        |    109082 | NS      | $27206500.37  | 2.27%             |  |  |  | No            |                  2 | On Loan: No      |
| AstraZeneca PLC                  | AstraZeneca PLC                           | CUSIP: 000000000<br>LEI: PY6ZZQWO2IZFZC3IOL08 | Long             | EC               | CORP              | GB        |    261857 | NS      | $38357877.67  | 3.20%             |  |  |  | No            |                  2 | On Loan: No      |
| Zurich Insurance Group AG        | Zurich Insurance Group AG                 | CUSIP: 000000000<br>LEI: 529900QVNRBND50TXP03 | Long             | EC               | CORP              | CH        |     35771 | NS      | $25091130.70  | 2.09%             |  |  |  | No            |                  2 | On Loan: No      |
| Sony Group Corp                  | Sony Group Corp                           | CUSIP: 000000000<br>LEI: 529900R5WX9N2OI2N910 | Long             | EC               | CORP              | JP        |   1406500 | NS      | $37646282.14  | 3.14%             |  |  |  | No            |                  2 | On Loan: No      |
| Tencent Holdings Ltd             | Tencent Holdings Ltd                      | CUSIP: 000000000<br>LEI: 254900N4SLUMW4XUYY11 | Long             | EC               | CORP              | CN        |    531400 | NS      | $33500866.38  | 2.79%             |  |  |  | No            |                  2 | On Loan: No      |
| RELX PLC                         | RELX PLC                                  | CUSIP: 000000000<br>LEI: 549300WSX3VBUFFJOO66 | Long             | EC               | CORP              | GB        |    713049 | NS      | $38415931.58  | 3.20%             |  |  |  | No            |                  2 | On Loan: No      |
| Cie de Saint-Gobain SA           | Cie de Saint-Gobain SA                    | CUSIP: 000000000<br>LEI: NFONVGN05Z0FMN5PEC35 | Long             | EC               | CORP              | FR        |    156027 | NS      | $17566138.36  | 1.46%             |  |  |  | No            |                  2 | On Loan: No      |
| Beiersdorf AG                    | Beiersdorf AG                             | CUSIP: 000000000<br>LEI: L47NHHI0Z9X22DV46U41 | Long             | EC               | CORP              | DE        |    265691 | NS      | $36443573.87  | 3.04%             |  |  |  | No            |                  2 | On Loan: No      |
| General Electric Co              | General Electric Co                       | CUSIP: 369604301<br>LEI: 3C7474T6CDKPR9K6YT90 | Long             | EC               | CORP              | US        |    105699 | NS      | $25992441.09  | 2.17%             |  |  |  | No            |                  1 | On Loan: No      |
| Teck Resources Ltd               | Teck Resources Ltd                        | CUSIP: 878742204<br>LEI: T8KI5SQ2JRWHL7XY0E11 | Long             | EC               | CORP              | CA        |    759049 | NS      | $28130748.09  | 2.34%             |  |  |  | No            |                  1 | On Loan: No      |
| Mastercard Inc                   | Mastercard Inc                            | CUSIP: 57636Q104<br>LEI: AR5L2ODV9HN37376R084 | Long             | EC               | CORP              | US        |     48759 | NS      | $28553270.40  | 2.38%             |  |  |  | No            |                  1 | On Loan: No      |
| Nestle SA                        | Nestle SA                                 | CUSIP: 000000000<br>LEI: KY37LUS27QQX7BB93L28 | Long             | EC               | CORP              | CH        |    346049 | NS      | $36867070.67  | 3.07%             |  |  |  | No            |                  2 | On Loan: No      |
| Deutsche Telekom AG              | Deutsche Telekom AG                       | CUSIP: 000000000<br>LEI: 549300V9QSIG4WX4GJ96 | Long             | EC               | CORP              | DE        |    979426 | NS      | $37089332.00  | 3.09%             |  |  |  | No            |                  2 | On Loan: No      |
| Assa Abloy AB                    | Assa Abloy AB                             | CUSIP: 000000000<br>LEI: 549300YECS8HKCIMMB67 | Long             | EC               | CORP              | SE        |    745481 | NS      | $23662005.66  | 1.97%             |  |  |  | No            |                  2 | On Loan: No      |
| FinecoBank Banca Fineco SpA      | FinecoBank Banca Fineco SpA               | CUSIP: 000000000<br>LEI: 549300L7YCATGO57ZE10 | Long             | EC               | CORP              | IT        |   1660829 | NS      | $35917017.92  | 2.99%             |  |  |  | No            |                  2 | On Loan: No      |
| SMC Corp                         | SMC Corp                                  | CUSIP: 000000000<br>LEI: 353800O40V08DOZ70X62 | Long             | EC               | CORP              | JP        |     97000 | NS      | $36371307.02  | 3.03%             |  |  |  | No            |                  2 | On Loan: No      |
| Novo Nordisk A/S                 | Novo Nordisk A/S                          | CUSIP: 000000000<br>LEI: 549300DAQ1CVT6CXN342 | Long             | EC               | CORP              | DK        |    452773 | NS      | $32168543.19  | 2.68%             |  |  |  | No            |                  2 | On Loan: No      |
| ASM International NV             | ASM International NV                      | CUSIP: 000000000<br>LEI: 7245001I22ND6ZFHX623 | Long             | EC               | CORP              | NL        |     53615 | NS      | $29179756.67  | 2.43%             |  |  |  | No            |                  2 | On Loan: No      |
| Toronto-Dominion Bank/The        | Toronto-Dominion Bank/The                 | CUSIP: 891160509<br>LEI: PT3QB789TSUIDF371261 | Long             | EC               | CORP              | CA        |    458443 | NS      | $31658573.33  | 2.64%             |  |  |  | No            |                  1 | On Loan: No      |
| Shell PLC                        | Shell PLC                                 | CUSIP: 000000000<br>LEI: 21380068P1DRHMJ8KU70 | Long             | EC               | CORP              | GB        |   1429775 | NS      | $47428128.20  | 3.95%             |  |  |  | No            |                  2 | On Loan: No      |

### Signature

**Date Signed:** 2025-07-24

**Name of Applicant:** BlackRock Series, Inc.

**Signature:** Chuck Pulsfort

**Name of Signer:** Chuck Pulsfort

**Title:** Assistant Treasurer