Andrea Pfeifer files Form 144 to sell 10,000 shares

Andrea Pfeifer reports intent to sell 10,000 common shares.

Rhea-AI Filing Summary

Andrea Pfeifer reports intent to sell 10,000 common shares. The Form 144 lists 10,000 shares with an aggregate value of $31,900 and identifies Morgan Stanley Smith Barney LLC as the broker. The filing also records 10b5-1 sales of 10,000 shares on 03/16/2026 for $31,966 and 10,000 shares on 02/17/2026 for $28,693. A 10,000-share block is noted as issuable from previously exercised options dated 06/01/2012.

Key Figures

Proposed sale: 10,000 shares Aggregate value (listing): $31,900 10b5-1 sale 03/16/2026: 10,000 shares / $31,966 +2 more

5 metrics

Proposed sale 10,000 shares listed on Form 144

Aggregate value (listing) $31,900 amount shown with 10,000-share line

10b5-1 sale 03/16/2026 10,000 shares / $31,966 recorded past sale

10b5-1 sale 02/17/2026 10,000 shares / $28,693 recorded past sale

Option exercise date 06/01/2012 previously exercised stock options linked to 10,000 shares

Key Terms

Form 144, 10b5-1 Sales, Previously Exercised Stock Options

3 terms

Form 144 regulatory

"Filer Information | 144: Filer Information"

Form 144 is a document that investors must file with the government when they plan to sell a large number of shares of a company's stock. It helps ensure transparency so everyone knows how many shares are being sold and when, which can impact the stock's price.

10b5-1 Sales regulatory

"10b5-1 Sales for ANDREA PFEIFER ... | Common | 03/16/2026"

10b5-1 sales are pre-arranged stock-trading plans that let company insiders automatically buy or sell shares according to a fixed schedule or formula, even if they later learn confidential information. Think of it as setting up an automatic thermostat for trades: it creates a clear, documented path that can protect insiders from insider-trading accusations and gives investors a signal about predictable insider activity—though it can also simply be a way for insiders to diversify or raise cash.

Previously Exercised Stock Options financial

"Securities To Be Sold | Previously Exercised Stock Options"

FAQ

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

What did Andrea Pfeifer disclose on Form 144 for ACIU?

She disclosed an intent to sell 10,000 common shares. The filing lists a reported aggregate value of $31,900, names Morgan Stanley Smith Barney LLC as broker, and references prior 10b5-1 sales on 03/16/2026 and 02/17/2026.

How many shares and what amounts were sold under 10b5-1 plans recently?

The filing records two recent 10b5-1 sales of 10,000 shares each. One sale on 03/16/2026 for $31,966 and another on 02/17/2026 for $28,693, as listed in the excerpt.

Who is the broker listed on the Form 144 for ACIU?

The broker named is Morgan Stanley Smith Barney LLC. The broker address and a 10,000-share offering are associated with that broker in the filing excerpt, including an aggregate value of $31,900 tied to the 10,000 shares.

Does the filing show how the 10,000 shares were acquired?

Yes. The excerpt notes the shares relate to previously exercised stock options dated 06/01/2012. The line lists 10,000 shares tied to cash exercise of options on that date in the provided content.

Are the recent 10b5-1 sales part of the Form 144 totals?

The Form 144 lists the intended 10,000-share sale and separately records two 10b5-1 dispositions in the past three months: 03/16/2026 (10,000 shares, $31,966) and 02/17/2026 (10,000 shares, $28,693), as shown in the excerpt.

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

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Accepted by SEC EDGAR 04/15/2026 - 04:52 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, 1015 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	10000	31900.00	101742231	04/15/2026	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			10000	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, 1015 Lausanne V8 00000	Common	03/16/2026	10000	31966.00
10b5-1 Sales for ANDREA PFEIFER EPFL Innovation Park, Building B, 1015 Lausanne V8 00000	Common	02/17/2026	10000	28693.00

144: Remarks and Signature

Remarks	The securities to be sold were acquired upon the vesting of Previously Exercised Stock Options during the period of 06/01/2012 through 05/11/2016.
Date of Notice	04/15/2026
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)