[144] PTC THERAPEUTICS, INC. SEC Filing

Rhea-AI Filing Summary

Form 144 notice reports a proposed sale of 3,375 common shares by an affiliated person, scheduled approximately on 10/07/2025 through Fidelity Brokerage Services LLC on NASDAQ. The filing records the securities were acquired as an option granted on 01/07/2022 and that payment on the planned sale will be in cash. The form also lists five recent open-market sales by the same seller totaling 73,983 shares across dates from 08/15/2025 to 10/06/2025 with individual gross proceeds shown (largest single-day gross proceeds $1,508,093.64 on 09/12/2025).

The document includes the seller's representation about lack of undisclosed material adverse information and mentions Rule 10b5-1 plan language but provides no further corporate financial metrics or forward guidance. The filing is procedural and focused on disclosure of insider sales activity rather than company operational results.

Positive

• Required disclosure filed, showing compliance with Rule 144 and transparency about intended insider sales
• Acquisition source is documented (option grant dated 01/07/2022), clarifying the legal basis for the shares

Negative

• Material insider selling: 73,983 shares sold in past two months, which could add selling pressure
• Largest recent single-day gross proceeds reported $1,508,093.64 on 09/12/2025, indicating sizable dispositions

Insights

Insider Transactions Analyst

Significant ongoing insider sales, disclosed under Rule 144, may increase share supply near-term.

3,375 shares are scheduled for proposed sale on 10/07/2025, acquired under an option granted on 01/07/2022, and recent open-market disposals by the same seller total 73,983 shares across five trades with multi-hundred-thousand dollar proceeds each. These figures show active monetization of holdings rather than a single isolated disposition.

Market impact depends on trade execution size versus average daily volume and whether the sales follow a 10b5-1 plan; the filing references plan adoption language but gives no adoption date. Watch short-term volume and exchange reports over the next few trading days for price impact and whether additional Form 144s or 4s are filed.

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	3375	214094.69	79438094	10/07/2025	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	10/07/2025	Option Granted - 01/07/2022	Issuer			3375	10/07/2025	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	136646.45
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
Mark Boulding 500 Warren Corporate Center Drive Warren NJ 07059	Common	10/03/2025	22655	1491105.66
Mark Boulding 500 Warren Corporate Center Drive Warren NJ 07059	Common	10/06/2025	2266	147453.15

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 does the PTCT Form 144 filed on 10/07/2025 disclose?

It discloses a proposed sale of 3,375 common shares planned for 10/07/2025 through Fidelity Brokerage Services LLC on NASDAQ.

How were the 3,375 shares acquired according to the Form 144 for PTCT?

The shares were acquired via an option grant with the option granted on 01/07/2022 and payment for the proposed sale listed as cash.

How many shares did the insider sell in the past three months per the filing?

The filing lists five prior sales totaling 73,983 shares between 08/15/2025 and 10/06/2025.

What were the reported gross proceeds from recent insider sales?

Individual gross proceeds shown include amounts up to $1,508,093.64 on 09/12/2025; other single-day proceeds range from about $136,646.45 to $1,491,105.66.

Does the Form 144 state whether a 10b5-1 trading plan was used?

The filing contains standard 10b5-1 plan language but does not specify a plan adoption date or provide plan details.