UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 6-K

REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934

For the month of August, 2023

Commission file number: 001-37891

AC IMMUNE SA

(Exact Name of Registrant as Specified in Its Charter)

EPFL Innovation Park

Building B

1015 Lausanne, Switzerland

(Address of Principal Executive Offices)

Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F.

Form 20-F ☒     Form 40-F ☐

This Report on Form 6-K (other than Exhibit 99.3 hereto) shall be deemed to be incorporated by reference into the registration statements on Form F-3 (File No. 333- 255576, File No. 333-227016 and File No. 333-249655) and Form S-8 (File No. 333-233019) of AC Immune SA and to be a part thereof from the date on which this report is filed, to the extent not superseded by documents or reports subsequently filed or furnished.

SIGNATURE

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, thereunto duly authorized.

	AC IMMUNE SA
	By:	/s/ Andrea Pfeifer
		Name:  Andrea Pfeifer
		Title:    Chief Executive Officer
	By:	/s/ Christopher Roberts
		Name:  Christopher Roberts
		Title:    Vice President, Finance and Interim Chief Financial Officer
Date:     August 4, 2023

EXHIBIT INDEX

Exhibit Number	Description
99.1	Interim Condensed Consolidated Financial Statements (Unaudited) (IFRS) as of and for the three and six months ended June 30, 2023
99.2	Management’s Discussion and Analysis of Financial Condition and Results of Operations
99.3	Press Release dated August 4, 2023