The Allstate Corporation (ALL) 10-Q 2021 Q2 Quarterly report

Exhibit 15

The Allstate Corporation

2775 Sanders Road

Northbrook, IL 60062

We have reviewed, in accordance with the standards of the Public Company Accounting Oversight Board (United States), the unaudited interim financial information of The Allstate Corporation and subsidiaries for the periods ended June 30, 2021 and 2020, as indicated in our report dated August 4, 2021; because we did not perform an audit, we expressed no opinion on that information.

We are aware that our report referred to above, which is included in your Quarterly Report on Form 10-Q for the quarter ended June 30, 2021, is incorporated by reference in the following Registration Statements:

Form S-3 Registration Statement Nos.	Form S-8 Registration Statement Nos.
333-255698	333-04919
	333-40283
	333-134243
	333-175526
	333-188821
	333-200390
	333-218343
	333-228490
	333-228491
	333-228492
	333-231753

We also are aware that the aforementioned report, pursuant to Rule 436(c) under the Securities Act of 1933, is not considered a part of the Registration Statement prepared or certified by an accountant or a report prepared or certified by an accountant within the meaning of Sections 7 and 11 of that Act.

/s/ DELOITTE & TOUCHE LLP

Chicago, Illinois

August 4, 2021