Form 144: Proposed sale of 2,812 common shares

Filer submitted a Form 144 notifying the sale of Common stock.

Rhea-AI Filing Summary

Filer submitted a Form 144 notifying the sale of Common stock. The notice lists 2,812 shares identified for sale on 05/15/2026 and shows prior reported sales by Mark Boulding of 2,265 shares on 04/06/2026 and 3,540 shares on 05/08/2026. The filing records cash settlement methods.

Insights

Securities Attorney

Rule 144 notice of proposed resale by an affiliate or broker-dealer; transaction details shown.

The filing is a Form 144 notice listing 2,812 shares offered for sale on 05/15/2026, with the method of sale indicated as cash. It also documents recent reported dispositions by Mark Boulding on 04/06/2026 (2,265 shares) and 05/08/2026 (3,540 shares).

Form 144s are procedural notices required when affiliates or control persons intend to sell restricted or control securities under Rule 144; the filing itself does not confirm completed trades or market impact. Subsequent transaction confirmations or broker reports would show execution details.

Key Figures

Proposed shares to be sold: 2,812 shares Recent sale by Mark Boulding: 2,265 shares Recent sale by Mark Boulding: 3,540 shares +2 more

5 metrics

Proposed shares to be sold 2,812 shares listed for sale on 05/15/2026

Recent sale by Mark Boulding 2,265 shares sale dated 04/06/2026 for $157,282.96

Recent sale by Mark Boulding 3,540 shares sale dated 05/08/2026 for $279,564.92

Recorded dollar value (example) $157,282.96 associated with 2,265-share sale on 04/06/2026

Recorded dollar value (example) $279,564.92 associated with 3,540-share sale on 05/08/2026

Key Terms

Form 144, Rule 144, cash settlement

3 terms

Form 144 regulatory

"Filer submitted a Form 144 notifying the sale of Common stock."

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.

Rule 144 regulatory

"Form 144 notice listing shares offered for sale under Rule 144 procedures."

Rule 144 is a U.S. securities regulation that sets conditions under which restricted or insider-held shares can be legally resold to the public, such as required holding periods, availability of public information, limits on how much can be sold at once, and certain filing requirements. For investors it matters because it determines when previously locked-up shares can enter the market — like a release valve that can increase supply, affect share price, and signal insider intent.

cash settlement financial

"The filing records cash settlement methods for the securities to be sold."

Cash settlement is a process where, instead of exchanging physical assets like stocks or commodities, the parties involved settle the difference in value with money after a contract ends. For investors, it simplifies transactions by avoiding the need to handle or deliver the actual asset, making it quicker and more convenient to complete trades. This method ensures a straightforward way to settle agreements based on their final value.

FAQ

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

What does PTCT's Form 144 report?

It reports a proposed resale of 2,812 shares of Common stock dated 05/15/2026. The form lists the sale method as cash and includes recent reported dispositions by Mark Boulding.

Who reported recent share sales in the filing for PTCT?

The filing shows reported sales by Mark Boulding: 2,265 shares on 04/06/2026 and 3,540 shares on 05/08/2026, with dollar amounts recorded in the notice.

Does the Form 144 confirm the shares were sold for PTCT?

No. Form 144 is a notice of intent to sell under Rule 144; it does not itself confirm that those shares have been executed or settled. Execution details appear in broker or trade confirmations.

What sale method is listed on PTCT's Form 144?

The notice identifies the sale method as cash for the listed securities on 05/15/2026. The form does not detail specific brokers' execution instructions beyond the sale method.

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

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Accepted by SEC EDGAR 05/15/2026 - 10:06 AM EDT 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	0001578852
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	PTC THERAPEUTICS, INC.
SEC File Number	001-35969
Address of Issuer	500 WARREN CORPORATE CENTER DRIVE WARREN NEW JERSEY 07059
Phone	9082227000
Name of Person for Whose Account the Securities are To Be Sold	Boulding Mark Elliott
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	Fidelity Brokerage Services LLC 900 Salem Street Smithfield RI 02917	2812	203729.40	82949338	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	05/15/2026	Option Granted - 02/15/2024	Issuer			2812	05/15/2026	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	04/06/2026	2265	157282.96
Mark Boulding 500 Warren Corporate Center Drive Warren NJ 07059	Common	05/08/2026	3540	279564.92

144: Remarks and Signature

Remarks
Date of Notice	05/15/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	09/10/2025
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/ Corey Walter, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Mark Boulding
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)