ACIU Form 144: Affiliate to sell 20,000 common shares

ACIU affiliate files Form 144 to sell 20,000 common shares.

Rhea-AI Filing Summary

ACIU affiliate files Form 144 to sell 20,000 common shares. The filing lists 20,000 shares proposed for sale and references prior 10b5-1 sales of 10,000 shares on 02/17/2026, 03/16/2026 and 04/15/2026 with the listed proceeds per sale. The notice identifies the shares as previously exercised stock options.

Insights

Securities Compliance Analyst

Form 144 notifies a planned resale by an affiliate under a 10b5-1 program.

The filing lists 20,000 common shares proposed for sale and records three prior 10b5-1 dispositions of 10,000 shares each on 02/17/2026 ($28,693), 03/16/2026 ($31,966), and 04/15/2026 ($31,425). The shares are described as issuable from previously exercised stock options.

Regulatory implication: this is an administrative resale notification; cash‑flow treatment and ultimate timing depend on the affiliate's selling plan. Subsequent filings may disclose completed transactions or updated quantities.

Key Figures

Proposed offered shares: 20,000 shares 10b5-1 sale on 02/17/2026: 10,000 shares 10b5-1 sale on 03/16/2026: 10,000 shares +1 more

4 metrics

Proposed offered shares 20,000 shares listed as securities to be sold

10b5-1 sale on 02/17/2026 10,000 shares proceeds <money>$28,693</money>

10b5-1 sale on 03/16/2026 10,000 shares proceeds <money>$31,966</money>

10b5-1 sale on 04/15/2026 10,000 shares proceeds <money>$31,425</money>

Key Terms

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

3 terms

10b5-1 regulatory

"10b5-1 Sales for ANDREA PFEIFER ..."

A 10b5-1 plan is a pre-set schedule that lets company insiders buy or sell shares according to written instructions made when they do not possess material, nonpublic information. Think of it as a timed automatic payment for stock trades: it helps insiders avoid accusations of trading on secret information and gives outside investors a clearer signal about whether sales are routine or potentially informative about the company’s prospects.

Form 144 regulatory

"Filer Information ... 144: Securities To Be Sold"

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.

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 does the ACIU Form 144 say about the shares being sold?

It states an affiliate proposes to sell 20,000 common shares. The filing labels the shares as from previously exercised stock options and lists the proposed amount.

Were any prior sales reported in the ACIU filing?

Yes. The filing reports three 10b5-1 sales of 10,000 shares each on 02/17/2026, 03/16/2026, and 04/15/2026 with proceeds shown per sale.

What proceeds were reported for the recent 10b5-1 sales?

The reported proceeds are $28,693 on 02/17/2026, $31,966 on 03/16/2026, and $31,425 on 04/15/2026, tied to the respective 10,000‑share sales.

Does Form 144 confirm when the 20,000 shares will be sold?

No specific sale timing is provided for the 20,000 shares in the excerpt. The filing shows the proposed amount and prior 10b5-1 dispositions but not a closing date.

Who is the reporting party on the Form 144 for ACIU?

The excerpt identifies sales executed under a 10b5-1 program for Andrea Pfeifer and lists Morgan Stanley Smith Barney LLC as an executing broker; the filing names the affiliate involved.

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

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Accepted by SEC EDGAR 05/15/2026 - 04:26 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	Director
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	20000	56000.00	101742231	05/15/2026	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			20000	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	04/15/2026	10000	31425.00
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	05/15/2026
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)