Exhibit 1(r)

BLACKROCK LARGE CAP SERIES FUNDS, INC.

ARTICLES SUPPLEMENTARY

BLACKROCK LARGE CAP SERIES FUNDS, INC., a Maryland corporation (the “Corporation”), hereby certifies to the State Department of Assessments and Taxation of the State of Maryland that:

FIRST: The Corporation is registered as an open-ended company under the Investment Company Act of 1940, as amended, with the authority to issue Eleven Billion Six Hundred Fifty Million (11,650,000,000) shares of capital stock as follows:

The remainder of the authorized capital stock of the Corporation, Three Billion Five Hundred Fifty Million (3,550,000,000) shares, is not designated or classified as to any class or series. All shares of capital stock of the Corporation have a par value of Ten Cents ($0.10) per share and an aggregate par value of One Billion One Hundred Sixty-Five Million Dollars ($1,165,000,000).

SECOND: Pursuant to authority expressly vested in the Board of Directors of the Corporation by Section 2-105(c) of the Maryland General Corporation Law and the Corporation’s charter, the Board of Directors hereby reclassifies (a) Fifty Million (50,000,000) authorized but unissued shares of Service Common Stock of BlackRock Advantage Large Cap Core Fund as shares of the Corporation’s common stock, without designation as to class or series, and (b) Fifty Million (50,000,000) authorized but unissued shares of Service Common Stock of BlackRock Advantage Large Cap Value Fund as shares of the Corporation’s common stock, without designation as to class or series.

THIRD: After the reclassification of authorized but unissued shares of capital stock of the Corporation as set forth herein, the Corporation will have the authority to issue Eleven Billion Six Hundred Fifty Million (11,650,000,000) shares of capital stock as follows:

The remainder of the authorized capital stock of the Corporation, Three Billion Six Hundred Fifty Million (3,650,000,000) shares, is not designated or classified as to any class or series. All shares of capital stock of the Corporation will have a par value of Ten Cents ($0.10) per share and an aggregate par value of One Billion One Hundred Sixty-Five Million Dollars ($1,165,000,000).

FOURTH: All of the shares of the Corporation’s capital stock continue to have the same preferences, conversion and other rights, voting powers, restrictions, limitations as to dividends, qualifications, and terms and conditions of redemption as currently set forth in the Corporation’s charter.

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IN WITNESS WHEREOF, BLACKROCK LARGE CAP SERIES FUNDS, INC. has caused these Articles Supplementary to be signed in its name and on its behalf by the person named below who acknowledges that these Articles Supplementary are the act of the Corporation and that, as to all matters and facts required to be verified under oath and to the best of his knowledge, information, and belief under the penalties of perjury, the matters and facts set forth herein are true in all material respects, as of this 6^th day of July 2021.

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Exhibit (10)(a)

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in this Registration Statement No. 333-89389 on Form N-1A of our report dated July 21, 2021, relating to the financial statements and financial highlights of BlackRock Advantage Large Cap Value Fund of BlackRock Large Cap Series Funds, Inc (the “Fund”), appearing in the Annual Report on Form N-CSR of the Funds for the year ended May 31, 2021, and to the references to us under the headings “Financial Highlights” and “Independent Registered Public Accounting Firm” in the Prospectuses and “Independent Registered Public Accounting Firm” and “Financial Statements” in the Statement of Additional Information, which are part of such Registration Statement.

/s/ Deloitte & Touche LLP

Boston, Massachusetts

September 21, 2021