PTCT insider sale notice — 22,655 shares planned on 10/03/2025

Rhea-AI Filing Summary

PTC Therapeutics, Inc. submitted a Form 144 disclosing a proposed sale of 22,655 common shares through Fidelity Brokerage Services LLC on 10/03/2025 with an aggregate market value of $1,491,104.96. The filing reports the shares were acquired under an option granted on 01/05/2023 and will be sold for cash. The issuer's outstanding shares are listed as 79,438,094.

The filing also lists prior sales by the same person in the past three months: 2,813 shares on 08/15/2025 (gross proceeds $136,646.54), 22,664 shares on 09/11/2025 (gross proceeds $1,382,537.63), and 24,585 shares on 09/12/2025 (gross proceeds $1,508,093.64). The filer attests there is no undisclosed material adverse information.

Positive

• Form 144 filed demonstrating compliance with Rule 144 disclosure requirements
• Sale details disclosed: broker (Fidelity), exact share count (22,655), sale date (10/03/2025), and aggregate market value ($1,491,104.96)
• Acquisition method disclosed (option granted 01/05/2023) and cash payment indicated

Negative

• None.

Insights

Securities Compliance Analyst

TL;DR: Insider filed a standard Rule 144 notice for a scheduled sale of 22,655 shares on 10/03/2025.

The Form 144 shows the securities were acquired via an option granted on 01/05/2023 and the planned sale will be executed through Fidelity Brokerage Services LLC for cash. The filing includes the issuer's total outstanding shares of 79,438,094, which provides context for the sale's size.

This notice is a regulatory disclosure required before certain insider sales; it documents recent insider transactions including three sales totaling 50,062 shares in the prior three months with combined reported gross proceeds of $3,027,277.81, as shown in the filing.

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

144: Issuer Information

Name of Issuer

SEC File Number

Address of Issuer

Phone

Name of Person for Whose Account the Securities are To Be Sold

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

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	Fidelity Brokerage Services LLC 900 Salem Street Smithfield RI 02917	22655	1491104.96	79438094	10/03/2025	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	10/03/2025	Option Granted - 01/05/2023	Issuer			22655	10/03/2025	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
Mark Boulding 500 Warren Corporate Center Drive Warren NJ 07059	Common	08/15/2025	2813	136646.54
Mark Boulding 500 Warren Corporate Center Drive Warren NJ 07059	Common	09/11/2025	22664	1382537.63
Mark Boulding 500 Warren Corporate Center Drive Warren NJ 07059	Common	09/12/2025	24585	1508093.64

144: Remarks and Signature

Remarks

Date of Notice

Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1

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

ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)

FAQ

What did PTC Therapeutics (PTCT) disclose in the Form 144?

The Form 144 discloses a proposed sale of 22,655 common shares through Fidelity on 10/03/2025 with an aggregate market value of $1,491,104.96.

How were the shares being sold by the PTCT filer acquired?

The filing states the shares were acquired via an option granted on 01/05/2023 and the sale consideration is cash.

Does the filing show other recent insider sales for PTCT?

Yes. The filer sold 2,813 shares on 08/15/2025 (proceeds $136,646.54), 22,664 shares on 09/11/2025 (proceeds $1,382,537.63), and 24,585 shares on 09/12/2025 (proceeds $1,508,093.64).

What is the issuer's total shares outstanding reported in the filing?

The Form 144 lists the issuer's shares outstanding as 79,438,094.

Who is the broker handling the proposed sale in the Form 144?

The broker named in the filing is Fidelity Brokerage Services LLC, located at 900 Salem Street, Smithfield, RI.