Insider plans sale of 30,000 common shares

A planned insider sale of common stock has been disclosed under Rule 144.

Rhea-AI Filing Summary

A planned insider sale of common stock has been disclosed under Rule 144. The person named in the notice, Andrea Pfeifer, plans to sell 30,000 shares of common stock through Morgan Stanley Smith Barney LLC on or around 01/15/2026, with an indicated aggregate market value of $110,100.00. The filing notes that 100,600,000 shares of this class are outstanding and lists NASDAQ as the securities exchange.

The shares to be sold were originally acquired on 06/01/2012 by exercising stock options issued by the company and paid for in cash. Over the past three months, there was a separate 10b5-1 sale for Andrea Pfeifer of 500 common shares on 10/29/2025 for gross proceeds of $2,000.00. By signing the notice, the seller represents that they are not aware of any undisclosed material adverse information about the issuer’s current or prospective operations.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What does this Rule 144 filing indicate for ACIU shareholders?

This notice indicates that an insider, Andrea Pfeifer, plans to sell 30,000 common shares on or around 01/15/2026 under Rule 144, using Morgan Stanley Smith Barney LLC as broker.

How many ACIU shares are planned to be sold and what is their market value?

The filing covers a planned sale of 30,000 common shares with an indicated aggregate market value of $110,100.00.

When and how were the shares in this Rule 144 notice originally acquired?

The 30,000 shares were acquired on 06/01/2012 through previously exercised stock options from the issuer and were paid for in cash on the same date.

What prior sales by this seller are disclosed in the past three months?

The document reports a 10b5-1 sale for Andrea Pfeifer of 500 common shares on 10/29/2025, with gross proceeds of $2,000.00.

On which exchange are these ACIU shares listed and how many are outstanding?

The filing identifies NASDAQ as the securities exchange for the common stock and states that 100,600,000 shares of this class are outstanding.

What representation does the seller make about inside information in this Rule 144 notice?

By signing, the seller represents that they do not know any material adverse information about the issuer’s current or prospective operations that has not been publicly disclosed.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 01/15/2026 - 04:25 PM Learn about SEC filing dates

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK	0001697107
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	AC IMMUNE SA
SEC File Number	001-37891
Address of Issuer	EPFL Innovation Park, Building B Lausanne SWITZERLAND 00000
Phone	41213459121
Name of Person for Whose Account the Securities are To Be Sold	ANDREA M.A PFEIFER
See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.
Relationship to Issuer	Officer

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common	Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza 8th Floor New York NY 10004	30000	110100.00	100600000	01/15/2026	NASDAQ

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common	06/01/2012	Previously Exercised Stock Options	Issuer			30000	06/01/2012	Cash

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
10b5-1 Sales for ANDREA PFEIFER EPFL Innovation Park, Building B Lausanne V8 00000	Common	10/29/2025	500	2000.00

144: Remarks and Signature

Remarks	The securities to be sold were acquired upon the vesting of previously exercised options during the period of 06/01/2012 through 05/11/2016.
Date of Notice	01/15/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	03/27/2025
ATTENTION:
The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.
Signature	/s/ Andrea M.A. Pfeifer
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)