# EDGAR Filing Document

**Accession Number:** 0001062806
**File Stem:** 0001752724-23-009974
**Filing Date:** 2023-1
**Character Count:** 14583
**Document Hash:** 2b513ee327380db26c0f557719603d6d
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001752724-23-009974.hdr.sgml**: 20230124

**ACCESSION NUMBER**: 0001752724-23-009974

**CONFORMED SUBMISSION TYPE**: NPORT-P

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20221130

**FILED AS OF DATE**: 20230124

**DATE AS OF CHANGE**: 20230124

**PERIOD START**: 20230531

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** BLACKROCK SERIES, INC.
- **CENTRAL INDEX KEY:** 0001062806
- **IRS NUMBER:** 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:** 23548937

**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:** 2023-05-31

- **b. Date as of which information is reported:** 2022-11-30

**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:** $1780276590.95

**Total Liabilities:** $12866518.07

**Net Assets:** $1767410072.88

**Monthly Return Information**

| Class               | Month 1 Return (%)   | Month 2 Return (%)   | Month 3 Return (%)   |
|:---|:---|:---|:---|
| Class ID C000005984 | -10.71%              | 6.72%                | 14.96%               |
| Class ID C000101856 | -10.74%              | 6.64%                | 14.95%               |
| Class ID C000005981 | -10.71%              | 6.67%                | 14.93%               |
| Class ID C000198221 | -10.70%              | 6.64%                | 15.03%               |
| Class ID C000005983 | -10.77%              | 6.60%                | 14.94%               |

**Monthly Gains & Losses**

| Period   | Net Realized Gain/Loss   | Net Unrealized Appreciation/Depreciation   |
|:---|:---|:---|
| Month 1  | $-83868510.10            | $-112274272.34                             |
| Month 2  | $-9106209.20             | $114772987.95                              |
| Month 3  | $9516770.55              | $229687560.69                              |

**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   |
|:---|:---|:---|:---|:---|:---|:---|---:|:---|:---|:---|:---|:---|:---|:---|---:|:---|
| GXO Logistics Inc                | GXO Logistics Inc                | CUSIP: 36262G101<br>LEI: 5493007CNWMXN78JRN66 | Long             | EC               | CORP              | US        |    631582 | NS      | $29595932.52  | 1.67%             |  |  |  | No            |                  1 | On Loan: No      |
| Novo Nordisk A/S                 | Novo Nordisk A/S                 | CUSIP: 000000000<br>LEI: 549300DAQ1CVT6CXN342 | Long             | EC               | CORP              | DK        |    685442 | NS      | $85980562.72  | 4.86%             |  |  |  | No            |                  2 | On Loan: No      |
| Equinix Inc                      | Equinix Inc                      | CUSIP: 29444U700<br>LEI: 549300EVUN2BTLJ3GT74 | Long             | EC               | CORP              | US        |     68836 | NS      | $47541583.40  | 2.69%             |  |  |  | No            |                  1 | On Loan: No      |
| Intesa Sanpaolo SpA              | Intesa Sanpaolo SpA              | CUSIP: 000000000<br>LEI: 2W8N8UU78PMDQKZENC08 | Long             | EC               | CORP              | IT        |  34123621 | NS      | $75763401.61  | 4.29%             |  |  |  | No            |                  2 | On Loan: No      |
| Thermo Fisher Scientific Inc     | Thermo Fisher Scientific Inc     | CUSIP: 883556102<br>LEI: HCHV7422L5HDJZCRFL38 | Long             | EC               | CORP              | US        |    111593 | NS      | $62516630.46  | 3.54%             |  |  |  | No            |                  1 | On Loan: No      |
| Kering SA                        | Kering SA                        | CUSIP: 000000000<br>LEI: 549300VGEJKB7SVUZR78 | Long             | EC               | CORP              | FR        |    128757 | NS      | $77361997.18  | 4.38%             |  |  |  | No            |                  2 | On Loan: No      |
| Tencent Holdings Ltd             | Tencent Holdings Ltd             | CUSIP: 000000000<br>LEI: 254900N4SLUMW4XUYY11 | Long             | EC               | CORP              | CN        |   2072300 | NS      | $78366751.26  | 4.43%             |  |  |  | No            |                  2 | On Loan: No      |
| Epiroc AB                        | Epiroc AB                        | CUSIP: 000000000<br>LEI: 5493004Q73OEYW1SPE91 | Long             | EC               | CORP              | SE        |   2041579 | NS      | $39312628.58  | 2.22%             |  |  |  | No            |                  2 | On Loan: No      |
| UniCredit SpA                    | UniCredit SpA                    | CUSIP: 000000000<br>LEI: 549300TRUWO2CD2G5692 | Long             | EC               | CORP              | IT        |   3019489 | NS      | $41239966.71  | 2.33%             |  |  |  | No            |                  2 | On Loan: No      |
| Daiichi Sankyo Co Ltd            | Daiichi Sankyo Co Ltd            | CUSIP: 000000000<br>LEI: 353800XGIU2IHQGC9504 | Long             | EC               | CORP              | JP        |   1582900 | NS      | $52426537.37  | 2.97%             |  |  |  | No            |                  2 | On Loan: No      |
| Canadian National Railway Co     | Canadian National Railway Co     | CUSIP: 136375102<br>LEI: 3SU7BEP7TH9YEQOZCS77 | Long             | EC               | CORP              | CA        |    341849 | NS      | $43886483.89  | 2.48%             |  |  |  | No            |                  1 | On Loan: No      |
| Marel HF                         | Marel HF                         | CUSIP: 000000000<br>LEI: 5299008YTLEN09WTHW26 | Long             | EC               | CORP              | IS        |   5442013 | NS      | $20160133.07  | 1.14%             |  |  |  | No            |                  1 | On Loan: No      |
| BlackRock Liquidity Funds T-Fund | BlackRock Liquidity Funds T-Fund | CUSIP: 09248U718<br>LEI: 5493002L9DNZ83RX7V61 | Long             | STIV             | RF                | US        |  38069622 | NS      | $38069621.84  | 2.15%             |  |  |  | No            |                  1 | On Loan: No      |
| Koninklijke DSM NV               | Koninklijke DSM NV               | CUSIP: 000000000<br>LEI: 724500SNT1MK246AHP04 | Long             | EC               | CORP              | NL        |    663350 | NS      | $86038684.59  | 4.87%             |  |  |  | No            |                  2 | On Loan: No      |
| MTU Aero Engines AG              | MTU Aero Engines AG              | CUSIP: 000000000<br>LEI: 529900807L67JY81RD65 | Long             | EC               | CORP              | DE        |    182332 | NS      | $38447122.75  | 2.18%             |  |  |  | No            |                  2 | On Loan: No      |
| Recruit Holdings Co Ltd          | Recruit Holdings Co Ltd          | CUSIP: 000000000<br>LEI: 353800R2LRSMVVC4I806 | Long             | EC               | CORP              | JP        |   2256000 | NS      | $72993475.31  | 4.13%             |  |  |  | No            |                  2 | On Loan: No      |
| Baker Hughes Co                  | Baker Hughes Co                  | CUSIP: 05722G100<br>LEI: N/A                  | Long             | EC               | CORP              | US        |   1711184 | NS      | $49658559.68  | 2.81%             |  |  |  | No            |                  1 | On Loan: No      |
| Standard Chartered PLC           | Standard Chartered PLC           | CUSIP: 000000000<br>LEI: U4LOSYZ7YG4W3S5F2G91 | Long             | EC               | CORP              | GB        |   7587456 | NS      | $56519247.94  | 3.20%             |  |  |  | No            |                  2 | On Loan: No      |
| Lonza Group AG                   | Lonza Group AG                   | CUSIP: 000000000<br>LEI: 549300EFW4H2TCZ71055 | Long             | EC               | CORP              | CH        |     98648 | NS      | $51897971.26  | 2.94%             |  |  |  | No            |                  2 | On Loan: No      |
| ASML Holding NV                  | ASML Holding NV                  | CUSIP: 000000000<br>LEI: 724500Y6DUVHQD6OXN27 | Long             | EC               | CORP              | NL        |    175318 | NS      | $107035172.77 | 6.06%             |  |  |  | No            |                  2 | On Loan: No      |
| Industria de Diseno Textil SA    | Industria de Diseno Textil SA    | CUSIP: 000000000<br>LEI: 549300TTCXZOGZM2EY83 | Long             | EC               | CORP              | ES        |   1152503 | NS      | $30084720.54  | 1.70%             |  |  |  | No            |                  2 | On Loan: No      |
| BNP PARIBAS SECURITIES CORP.     | USD/EUR FORWARD                  | CUSIP: 000000000<br>LEI: RCNB6OTYUAMMP879YW96 | N/A              | DFE              | CORP              | US        |         1 | NC      | $3672652.36   | 0.21%             |  |  |  | No            |                  2 | On Loan: No      |
| Vestas Wind Systems A/S          | Vestas Wind Systems A/S          | CUSIP: 000000000<br>LEI: 549300DYMC8BGZZC8844 | Long             | EC               | CORP              | DK        |   2142965 | NS      | $55678992.08  | 3.15%             |  |  |  | No            |                  2 | On Loan: No      |
| Roche Holding AG                 | Roche Holding AG                 | CUSIP: 000000000<br>LEI: 549300U41AUUVOAAOB37 | Long             | EC               | CORP              | CH        |    310247 | NS      | $101334083.01 | 5.73%             |  |  |  | No            |                  2 | On Loan: No      |
| Sony Group Corp                  | Sony Group Corp                  | CUSIP: 000000000<br>LEI: 529900R5WX9N2OI2N910 | Long             | EC               | CORP              | JP        |   1476900 | NS      | $122346653.42 | 6.92%             |  |  |  | No            |                  2 | On Loan: No      |
| Air Liquide SA                   | Air Liquide SA                   | CUSIP: 000000000<br>LEI: 969500MMPQVHK671GT54 | Long             | EC               | CORP              | FR        |    650141 | NS      | $94654750.39  | 5.36%             |  |  |  | No            |                  2 | On Loan: No      |
| Suncor Energy Inc                | Suncor Energy Inc                | CUSIP: 867224107<br>LEI: 549300W70ZOQDVLCHY06 | Long             | EC               | CORP              | CA        |   1520550 | NS      | $49997343.42  | 2.83%             |  |  |  | No            |                  1 | On Loan: No      |
| Beiersdorf AG                    | Beiersdorf AG                    | CUSIP: 000000000<br>LEI: L47NHHI0Z9X22DV46U41 | Long             | EC               | CORP              | DE        |    347625 | NS      | $37805388.55  | 2.14%             |  |  |  | No            |                  2 | On Loan: No      |
| Cellnex Telecom SA               | Cellnex Telecom SA               | CUSIP: 000000000<br>LEI: 5493008T4YG3AQUI7P67 | Long             | EC               | CORP              | ES        |    769175 | NS      | $26450810.57  | 1.50%             |  |  |  | No            |                  2 | On Loan: No      |
| J.P. MORGAN SECURITIES LLC       | USD/EUR FORWARD                  | CUSIP: 000000000<br>LEI: ZBUT11V806EZRVTWT807 | N/A              | DFE              | CORP              | US        |         1 | NC      | $-6175664.72  | -0.35%            |  |  |  | No            |                  2 | On Loan: No      |
| Infineon Technologies AG         | Infineon Technologies AG         | CUSIP: 000000000<br>LEI: TSI2PJM6EPETEQ4X1U25 | Long             | EC               | CORP              | DE        |   2036623 | NS      | $68411083.89  | 3.87%             |  |  |  | No            |                  2 | On Loan: No      |
| Prudential PLC                   | Prudential PLC                   | CUSIP: 000000000<br>LEI: 5493001Z3ZE83NGK8Y12 | Long             | EC               | CORP              | GB        |   2479460 | NS      | $29493156.63  | 1.67%             |  |  |  | No            |                  2 | On Loan: No      |

### Signature

**Date Signed:** 2023-01-24

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

**Signature:** Ann Frechette

**Name of Signer:** Ann Frechette

**Title:** Assistant Treasurer