# EDGAR Filing Document

**Accession Number:** 0001062806
**File Stem:** 0000940400-26-002206
**Filing Date:** 2026-1
**Character Count:** 19120
**Document Hash:** c89b63d4b5185d8cc2cb941620633306
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0000940400-26-002206.hdr.sgml**: 20260126

**ACCESSION NUMBER**: 0000940400-26-002206

**CONFORMED SUBMISSION TYPE**: NPORT-P

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20251128

**FILED AS OF DATE**: 20260126

**DATE AS OF CHANGE**: 20260126

**PERIOD START**: 20260531

**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:** 26559267

**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:** 2026-05-31

- **b. Date as of which information is reported:** 2025-11-28

**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:** $1150680113.06

**Total Liabilities:** $7449417.88

**Net Assets:** $1143230695.18

**Cash Not Reported:** $4378926.52

**Monthly Return Information**

| Class               | Month 1 Return (%)   | Month 2 Return (%)   | Month 3 Return (%)   |
|:---|:---|:---|:---|
| Class ID C000005981 | 3.66%                | 1.19%                | 0.00%                |
| Class ID C000005983 | 3.58%                | 1.10%                | -0.05%               |
| Class ID C000005984 | 3.67%                | 1.21%                | 0.05%                |
| Class ID C000101856 | 3.60%                | 1.14%                | 0.00%                |
| Class ID C000198221 | 3.62%                | 1.26%                | 0.05%                |

**Monthly Gains & Losses**

| Period   | Net Realized Gain/Loss   | Net Unrealized Appreciation/Depreciation   |
|:---|:---|:---|
| Month 1  | $-5398832.08             | $45314031.57                               |
| Month 2  | $16375557.69             | $-3667276.47                               |
| Month 3  | $4753144.76              | $-4986501.77                               |

**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      | $27664909.52  | 2.42%             |  |  |  | No            |                  2 | On Loan: No      |
| Toronto-Dominion Bank/The        | Toronto-Dominion Bank/The                 | CUSIP: 891160509<br>LEI: PT3QB789TSUIDF371261 | Long             | EC               | CORP              | CA        |    341187 | NS      | $28650967.44  | 2.51%             |  |  |  | No            |                  1 | On Loan: No      |
| Schneider Electric SE            | Schneider Electric SE                     | CUSIP: 000000000<br>LEI: 969500A1YF1XUYYXS284 | Long             | EC               | CORP              | FR        |    101427 | NS      | $27294580.74  | 2.39%             |  |  |  | No            |                  2 | On Loan: No      |
| Kone Oyj                         | Kone Oyj                                  | CUSIP: 000000000<br>LEI: 2138001CNF45JP5XZK38 | Long             | EC               | CORP              | FI        |    353348 | NS      | $24045415.39  | 2.10%             |  |  |  | No            |                  2 | On Loan: No      |
| Shell PLC                        | Shell PLC                                 | CUSIP: 000000000<br>LEI: 21380068P1DRHMJ8KU70 | Long             | EC               | CORP              | GB        |   1300708 | NS      | $47964682.78  | 4.20%             |  |  |  | No            |                  2 | On Loan: No      |
| Sanofi SA                        | Sanofi SA                                 | CUSIP: 000000000<br>LEI: 549300E9PC51EN656011 | Long             | EC               | CORP              | FR        |    245969 | NS      | $24532322.62  | 2.15%             |  |  |  | No            |                  2 | On Loan: No      |
| BlackRock Liquidity Funds T-Fund | BlackRock Liquidity Funds T-Fund          | CUSIP: 09248U718<br>LEI: 5493002L9DNZ83RX7V61 | Long             | STIV             | RF                | US        |   4665246 | NS      | $4665246.44   | 0.41%             |  |  |  | No            |                  1 | On Loan: No      |
| Axis Bank Ltd                    | Axis Bank Ltd                             | CUSIP: 000000000<br>LEI: 549300HVNWMJPOFVNI41 | Long             | EC               | CORP              | IN        |   1527424 | NS      | $21921038.34  | 1.92%             |  |  |  | No            |                  2 | On Loan: No      |
| BNP Paribas SA                   | BNP Paribas SA                            | CUSIP: 000000000<br>LEI: R0MUWSFPU8MPRO8K5P83 | Long             | EC               | CORP              | FR        |    200905 | NS      | $17173108.81  | 1.50%             |  |  |  | No            |                  2 | On Loan: No      |
| TSMC                             | Taiwan Semiconductor Manufacturing Co Ltd | CUSIP: 000000000<br>LEI: 549300KB6NK5SBD14S87 | Long             | EC               | CORP              | TW        |   1431000 | NS      | $65978232.68  | 5.77%             |  |  |  | No            |                  2 | On Loan: No      |
| Taylor Wimpey PLC                | Taylor Wimpey PLC                         | CUSIP: 000000000<br>LEI: 21380089BTRXTD8S3R66 | Long             | EC               | CORP              | GB        |  11863434 | NS      | $16125866.72  | 1.41%             |  |  |  | No            |                  2 | On Loan: No      |
| Anglo American PLC               | Anglo American PLC                        | CUSIP: 000000000<br>LEI: 549300S9XF92D1X8ME43 | Long             | EC               | CORP              | GB        |    465144 | NS      | $17580246.09  | 1.54%             |  |  |  | No            |                  2 | On Loan: No      |
| Koninklijke KPN NV               | Koninklijke KPN NV                        | CUSIP: 000000000<br>LEI: 549300YO0JZHAL7FVP81 | Long             | EC               | CORP              | NL        |   7409385 | NS      | $33945928.48  | 2.97%             |  |  |  | No            |                  2 | On Loan: No      |
| British American Tobacco PLC     | British American Tobacco PLC              | CUSIP: 000000000<br>LEI: 213800FKA5MF17RJKT63 | Long             | EC               | CORP              | GB        |    535724 | NS      | $31455154.96  | 2.75%             |  |  |  | No            |                  2 | On Loan: No      |
| Waste Connections Inc            | Waste Connections Inc                     | CUSIP: 94106B101<br>LEI: 549300HDLRTPBQU69P29 | Long             | EC               | CORP              | CA        |     98528 | NS      | $17403593.35  | 1.52%             |  |  |  | No            |                  1 | On Loan: No      |
| Kotak Mahindra Bank Ltd          | Kotak Mahindra Bank Ltd                   | CUSIP: 000000000<br>LEI: 335800E6GTTXKHXE2I75 | Long             | EC               | CORP              | IN        |    713905 | NS      | $17002522.19  | 1.49%             |  |  |  | No            |                  2 | On Loan: No      |
| MediaTek Inc                     | MediaTek Inc                              | CUSIP: 000000000<br>LEI: 254900UEGBK1I4DM4E14 | Long             | EC               | CORP              | TW        |    487000 | NS      | $21702156.37  | 1.90%             |  |  |  | No            |                  2 | On Loan: No      |
| SAP SE                           | SAP SE                                    | CUSIP: 000000000<br>LEI: 529900D6BF99LW9R2E68 | Long             | EC               | CORP              | DE        |    151707 | NS      | $36623593.65  | 3.20%             |  |  |  | No            |                  2 | On Loan: No      |
| Air Liquide SA                   | Air Liquide SA                            | CUSIP: 000000000<br>LEI: 969500MMPQVHK671GT54 | Long             | EC               | CORP              | FR        |     86499 | NS      | $16577335.04  | 1.45%             |  |  |  | No            |                  2 | On Loan: No      |
| Honda Motor Co Ltd               | Honda Motor Co Ltd                        | CUSIP: 000000000<br>LEI: 549300P7ZYCQJ36CCS16 | Long             | EC               | CORP              | JP        |   2278100 | NS      | $22972408.19  | 2.01%             |  |  |  | No            |                  2 | On Loan: No      |
| Keyence Corp                     | Keyence Corp                              | CUSIP: 000000000<br>LEI: 529900M7PQBS7A89DZ11 | Long             | EC               | CORP              | JP        |     68300 | NS      | $23249968.08  | 2.03%             |  |  |  | No            |                  2 | On Loan: No      |
| United Overseas Bank Ltd         | United Overseas Bank Ltd                  | CUSIP: 000000000<br>LEI: IO66REGK3RCBAMA8HR66 | Long             | EC               | CORP              | SG        |    788300 | NS      | $20691608.16  | 1.81%             |  |  |  | No            |                  2 | On Loan: No      |
| HDFC Bank Ltd                    | HDFC Bank Ltd                             | CUSIP: 000000000<br>LEI: 335800ZQ6I4E2JXENC50 | Long             | EC               | CORP              | IN        |   1911478 | NS      | $21599812.52  | 1.89%             |  |  |  | No            |                  2 | On Loan: No      |
| Industria de Diseno Textil SA    | Industria de Diseno Textil SA             | CUSIP: 000000000<br>LEI: 549300TTCXZOGZM2EY83 | Long             | EC               | CORP              | ES        |    412018 | NS      | $23116397.82  | 2.02%             |  |  |  | No            |                  2 | On Loan: No      |
| BBVA                             | Banco Bilbao Vizcaya Argentaria SA        | CUSIP: 000000000<br>LEI: K8MS7FD7N5Z2WQ51AZ71 | Long             | EC               | CORP              | ES        |   1055356 | NS      | $22810088.19  | 2.00%             |  |  |  | No            |                  2 | On Loan: No      |
| Alibaba Group Holding Ltd        | Alibaba Group Holding Ltd                 | CUSIP: 01609W102<br>LEI: 5493001NTNQJDH60PM02 | Long             | EC               | CORP              | HK        |    194945 | NS      | $30664848.50  | 2.68%             |  |  |  | No            |                  1 | On Loan: No      |
| Atlas Copco AB                   | Atlas Copco AB                            | CUSIP: 000000000<br>LEI: 213800T8PC8Q4FYJZR07 | Long             | EC               | CORP              | SE        |   1691120 | NS      | $28739000.91  | 2.51%             |  |  |  | No            |                  2 | On Loan: No      |
| AstraZeneca PLC                  | AstraZeneca PLC                           | CUSIP: 000000000<br>LEI: PY6ZZQWO2IZFZC3IOL08 | Long             | EC               | CORP              | GB        |    188328 | NS      | $34917700.49  | 3.05%             |  |  |  | No            |                  2 | On Loan: No      |
| Sony Group Corp                  | Sony Group Corp                           | CUSIP: 000000000<br>LEI: 529900R5WX9N2OI2N910 | Long             | EC               | CORP              | JP        |   1320300 | NS      | $38742343.26  | 3.39%             |  |  |  | No            |                  2 | On Loan: No      |
| Tencent Holdings Ltd             | Tencent Holdings Ltd                      | CUSIP: 000000000<br>LEI: 254900N4SLUMW4XUYY11 | Long             | EC               | CORP              | CN        |    464400 | NS      | $36692960.58  | 3.21%             |  |  |  | No            |                  2 | On Loan: No      |
| RELX PLC                         | RELX PLC                                  | CUSIP: 000000000<br>LEI: 549300WSX3VBUFFJOO66 | Long             | EC               | CORP              | GB        |    421711 | NS      | $16948939.34  | 1.48%             |  |  |  | No            |                  2 | On Loan: No      |
| Mitsubishi UFJ Financial Group   | Mitsubishi UFJ Financial Group Inc        | CUSIP: 000000000<br>LEI: 353800V2V8PUY9TK3E06 | Long             | EC               | CORP              | JP        |   1447300 | NS      | $22693000.48  | 1.98%             |  |  |  | No            |                  2 | On Loan: No      |
| Allianz SE                       | Allianz SE                                | CUSIP: 000000000<br>LEI: 529900K9B0N5BT694847 | Long             | EC               | CORP              | DE        |     69125 | NS      | $29838214.30  | 2.61%             |  |  |  | No            |                  2 | On Loan: No      |
| Assa Abloy AB                    | Assa Abloy AB                             | CUSIP: 000000000<br>LEI: 549300YECS8HKCIMMB67 | Long             | EC               | CORP              | SE        |    812294 | NS      | $30894804.10  | 2.70%             |  |  |  | No            |                  2 | On Loan: No      |
| General Electric Co              | General Electric Co                       | CUSIP: 369604301<br>LEI: 3C7474T6CDKPR9K6YT90 | Long             | EC               | CORP              | US        |     61561 | NS      | $18372880.45  | 1.61%             |  |  |  | No            |                  1 | On Loan: No      |
| SK hynix Inc                     | SK hynix Inc                              | CUSIP: 000000000<br>LEI: 988400XAIK6XISWQV045 | Long             | EC               | CORP              | KR        |     43729 | NS      | $15839485.97  | 1.39%             |  |  |  | No            |                  2 | On Loan: No      |
| Teck Resources Ltd               | Teck Resources Ltd                        | CUSIP: 878742204<br>LEI: T8KI5SQ2JRWHL7XY0E11 | Long             | EC               | CORP              | CA        |    450632 | NS      | $19325468.36  | 1.69%             |  |  |  | No            |                  1 | On Loan: No      |
| Mastercard Inc                   | Mastercard Inc                            | CUSIP: 57636Q104<br>LEI: AR5L2ODV9HN37376R084 | Long             | EC               | CORP              | US        |     41247 | NS      | $22707710.91  | 1.99%             |  |  |  | No            |                  1 | On Loan: No      |
| Deutsche Telekom AG              | Deutsche Telekom AG                       | CUSIP: 000000000<br>LEI: 549300V9QSIG4WX4GJ96 | Long             | EC               | CORP              | DE        |    661616 | NS      | $21335657.19  | 1.87%             |  |  |  | No            |                  2 | On Loan: No      |
| FinecoBank Banca Fineco SpA      | FinecoBank Banca Fineco SpA               | CUSIP: 000000000<br>LEI: 549300L7YCATGO57ZE10 | Long             | EC               | CORP              | IT        |   1398033 | NS      | $34388898.09  | 3.01%             |  |  |  | No            |                  2 | On Loan: No      |
| Grupo Financiero Banorte SAB d   | Grupo Financiero Banorte SAB de CV        | CUSIP: 000000000<br>LEI: N/A                  | Long             | EC               | CORP              | MX        |   1882100 | NS      | $18116536.58  | 1.58%             |  |  |  | No            |                  1 | On Loan: No      |
| EssilorLuxottica SA              | EssilorLuxottica SA                       | CUSIP: 000000000<br>LEI: 549300M3VH1A3ER1TB49 | Long             | EC               | CORP              | FR        |     63481 | NS      | $22769032.91  | 1.99%             |  |  |  | No            |                  2 | On Loan: No      |
| ASM International NV             | ASM International NV                      | CUSIP: 000000000<br>LEI: 7245001I22ND6ZFHX623 | Long             | EC               | CORP              | NL        |     47076 | NS      | $26041434.51  | 2.28%             |  |  |  | No            |                  2 | On Loan: No      |
| Kia Corp                         | Kia Corp                                  | CUSIP: 000000000<br>LEI: 988400V8MJK9N7OI5X76 | Long             | EC               | CORP              | KR        |    233825 | NS      | $18168097.59  | 1.59%             |  |  |  | No            |                  2 | On Loan: No      |
| ASR Nederland NV                 | ASR Nederland NV                          | CUSIP: 000000000<br>LEI: 7245000G0HS48PZWUD53 | Long             | EC               | CORP              | NL        |    310574 | NS      | $20969359.91  | 1.83%             |  |  |  | No            |                  2 | On Loan: No      |

### Signature

**Date Signed:** 2026-01-23

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

**Signature:** Chuck Pulsfort

**Name of Signer:** Chuck Pulsfort

**Title:** Assistant Treasurer