8-K

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section

13 or 15(d) of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported):

March 31, 2026

ALEXANDRIA REAL ESTATE EQUITIES, INC.

(Exact name of registrant as specified in its charter)

Registrant’s telephone number, including

area code: (626) 578-0777

N/A

(Former name or former address, if changed since last report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

Securities registered pursuant to Section 12(b) of the Exchange Act:

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company                   ¨

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ¨

On and effective March 31, 2026, Alexandria Real Estate Equities, Inc. (“Alexandria,” or the “Company”) filed Articles Supplementary (the “Articles Supplementary”) with the State Department of Assessments and Taxation of Maryland.

The Articles Supplementary reflect the Company’s election to opt out (the “opt out”) of Section 3-804(a) of the Maryland General Corporation Law (“MGCL”), the statutory provision that requires the affirmative vote of at least two-thirds of all of the votes entitled to be cast by stockholders generally in the election of directors to remove directors. As a result of the opt-out, the Company is no longer subject to the two-thirds director-removal voting requirement under MGCL Section 3-804(a). Director removal is now governed by the Company’s charter, which provides for the removal of directors by the affirmative vote of a majority of all votes entitled to be cast on the matter.

The Articles Supplementary were approved by the Company’s Board of Directors on March 30, 2026, following the stockholder approval of a “Simple Majority Vote” proposal at the 2025 Annual Meeting of Stockholders.

The foregoing summary of the Articles Supplementary is qualified in its entirety by reference to the Articles Supplementary filed as Exhibit 3.1 hereto.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

Exhibit 3.1

ALEXANDRIA REAL ESTATE EQUITIES, INC.

ARTICLES SUPPLEMENTARY

Alexandria Real Estate Equities, Inc., a Maryland corporation (the “Corporation”), hereby certifies to the State Department of Assessments and Taxation of Maryland that:

FIRST: Pursuant to Section 3-802(b)(3) of the Maryland General Corporation Law (the “MGCL”), the Corporation, by a resolution of its Board of Directors (the “Board”), elected to no longer be subject to Section 3-804(a) of the MGCL.

SECOND: The Corporation’s election to no longer be subject to Section 3-804(a) of the MGCL has been approved by the Board in the manner and by the vote required by law.

THIRD: These Articles Supplementary shall become effective on March 31, 2026.

FOURTH: The undersigned acknowledges these Articles Supplementary to be the act of the Corporation and, as to all matters or facts required to be verified under oath, the undersigned acknowledges that, to the best of his knowledge, information and belief, these matters and facts are true in all material respects and that this statement is made under the penalties for perjury.

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IN WITNESS WHEREOF, the Corporation has caused these Articles Supplementary to be executed in its name and on its behalf by its Chairman of the Board and attested by its Chief Financial Officer on this 31st day of March, 2026.