EXHIBIT 15.1

May 21, 2026

The Board of Directors and Stockholders of Alexander’s, Inc.

210 Route 4 East

Paramus, New Jersey 07652

We are aware that our report dated May 4, 2026, on our review of the interim financial information of Alexander’s, Inc. appearing in Alexander’s, Inc.’s Quarterly Report on Form 10-Q for the quarter ended March 31, 2026, is incorporated by reference in this Registration Statement.

/s/ DELOITTE & TOUCHE LLP

New York, New York