# EDGAR Filing Document

**Accession Number:** 0000774013
**File Stem:** 0001193125-23-058160
**Filing Date:** 2023-3
**Character Count:** 6580
**Document Hash:** ff96a45efee4ecc548b49a6ec3d9cd4b
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-23-058160.hdr.sgml**: 20230302

**ACCESSION NUMBER**: 0001193125-23-058160

**CONFORMED SUBMISSION TYPE**: 497

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20230302

**DATE AS OF CHANGE**: 20230302

**EFFECTIVENESS DATE**: 20230302

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** BLACKROCK MULTI STATE MUNICIPAL SERIES TRUST
- **CENTRAL INDEX KEY:** 0000774013
- **IRS NUMBER:** 226437104
- **STATE OF INCORPORATION:** MA
- **FISCAL YEAR END:** 0731

**FILING VALUES:**
- **FORM TYPE:** 497
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 002-99473
- **FILM NUMBER:** 23698977

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

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

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** MERRILL LYNCH MULTI STATE MUNICIPAL SERIES TRUST
- **DATE OF NAME CHANGE:** 20051212

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** MERRILL LYNCH N Y MUNI BD FD OF M L MULTI ST MUNI SER TRUST
- **DATE OF NAME CHANGE:** 19930225

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** MERRILL LYNCH MULTI STATE TAX EXEMPT SERIES TRUST
- **DATE OF NAME CHANGE:** 19871206

## Series and Classes Contracts Data

### BlackRock New York Municipal Opportunities Fund (Series ID: S000004034)

---

|  |  |
|:---|:---|
| Class Name    | Class ID   |
| Investor A1   | C000011313 |
| Institutional | C000011316 |
| Investor A    | C000038358 |
| Investor C    | C000038359 |
| Class K       | C000199771 |

---

## Series and Classes Contracts Data

### BlackRock New York Municipal Opportunities Fund (Series ID: S000004034)

| Class ID   | Class Name    | Ticker Symbol   |
|:---|:---|:---|
| C000011313 | Investor A1   |  |
| C000011316 | Institutional |  |
| C000038358 | Investor A    |  |
| C000038359 | Investor C    |  |
| C000199771 | Class K       |  |

**BLACKROCK MULTI-STATE MUNICIPAL SERIES TRUST** 

**BlackRock New York Municipal Opportunities Fund** 

(the "Fund")

**Supplement dated March 2, 2023 (the "Supplement") to the Fund's** 

**Summary Prospectuses and Prospectuses, each dated October 28, 2022, as supplemented to date** 

**The following changes are made to the Fund's Summary Prospectuses and Prospectuses, as applicable:** 

**The section of the Summary Prospectuses entitled "Key Facts About BlackRock New York Municipal Opportunities Fund — Portfolio Managers" and the section of the Prospectuses entitled "Fund Overview — Key Facts About BlackRock New York Municipal Opportunities Fund — Portfolio Managers" are deleted in their entirety and replaced with the following:** 

***Portfolio Managers***

---

| | | |
|:---|:---|:---|
| **Name** | **Portfolio Manager of<br>the Fund Since** | **Title** |
| Peter Hayes | 2015 | Managing Director of BlackRock, Inc. |
| Michael Kalinoski, CFA | 2015 | Director of BlackRock, Inc. |
| Kevin Maloney, CFA | 2022 | Director of BlackRock, Inc. |
| Ryan McDonald, CFA | 2023 | Managing Director of BlackRock, Inc. |
| Christian Romaglino, CFA | 2023 | Director of BlackRock, Inc. |

---

**The section of the Prospectuses 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. Peter Hayes, Michael Kalinoski, CFA, Kevin Maloney, CFA, Ryan McDonald, CFA, and Christian Romaglino, CFA, 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 Prospectuses entitled "Management of the Fund — Portfolio Manager Information" is deleted in its entirety and replaced with the following:** 

***Portfolio Manager Information***

Information regarding the portfolio managers of the Fund is set forth below. Further information regarding the portfolio managers, including other accounts managed, compensation, ownership of Fund shares, and possible conflicts of interest, is available in the Fund's SAI.

The Fund is managed by a team of financial professionals led by Peter Hayes, Michael Kalinoski, CFA, Kevin Maloney, CFA, Ryan McDonald, CFA, and Christian Romaglino, CFA, who are jointly and primarily responsible for the day-to-day management of the Fund.

------

---

| | | | |
|:---|:---|:---|:---|
| **Portfolio Manager** | **Primary Role** | **Since** | **Title and Recent Biography** |
| Peter Hayes | 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. | 2015 | Managing Director of BlackRock, Inc. since 2006; Head of Municipal Bonds within BlackRock Fixed Income Portfolio Management Group since 2006. |
| Michael Kalinoski, CFA | 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. | 2015 | Director of BlackRock, Inc. since 2006. |
| Kevin Maloney, CFA | 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. | 2022 | Director of BlackRock, Inc. since 2021; Vice President of BlackRock, Inc. from 2018 to 2020; Associate of BlackRock, Inc. from 2014 to 2017; Analyst of BlackRock, Inc. from 2011 to 2013. |
| Ryan McDonald, CFA | 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. | 2023 | Managing Director of BlackRock, Inc. since 2023; Director of BlackRock, Inc. from 2017 to 2022; Vice President of BlackRock, Inc. from 2014 to 2016; Vice President of Moelis & Co. from 2013 to 2014. |
| Christian Romaglino, CFA | 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 | 2023 | Director at BlackRock, Inc. since 2017; portfolio manager at Brown Brothers Harriman from 2010 to 2017. |

---

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

PRO-NYM-0323SUP