PTCT affiliate files Form 144 to sell 3,540 shares

PTCT affiliate submitted a Form 144 notice to sell 3,540 shares of Common Stock.

Rhea-AI Filing Summary

PTCT affiliate submitted a Form 144 notice to sell 3,540 shares of Common Stock. The filing lists an option granted on 01/03/2025 and a planned sale date of 05/08/2026. The filing also shows three recent dispositions by Mark Boulding totaling 8,097 shares sold on 02/17/2026, 02/19/2026, and 04/06/2026, and reports 82,949,338 shares outstanding as of 05/08/2026.

Insights

Securities Compliance Analyst

Form 144 filed for resale of 3,540 common shares by an affiliate.

The notice lists an option granted 01/03/2025 as the source of the shares and a planned sale date of 05/08/2026. Form 144 provides the required broker/issuer details to permit resale under Rule 144 when the conditions are met.

Cash proceeds and broker info are included; the filing references prior dispositions by Mark Boulding (2,813; 3,019; 2,265 shares). Timing and eligibility depend on Rule 144 conditions and broker-handling; subsequent SEC filings will show completed transactions.

Key Figures

Registered/offered shares: 3,540 shares Shares outstanding: 82,949,338 shares Recent sale by Mark Boulding: 2,265 shares +2 more

5 metrics

Registered/offered shares 3,540 shares Form 144 resale notice, planned sale date 05/08/2026

Shares outstanding 82,949,338 shares Shares outstanding as of 05/08/2026

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

Recent sale by Mark Boulding 2,813 shares Sold on 02/17/2026 for $194,906.02

Recent sale by Mark Boulding 3,019 shares Sold on 02/19/2026 for $209,761.74

Key Terms

Form 144, Option Granted, Fidelity Brokerage Services LLC

3 terms

Form 144 regulatory

"Form 144 notice to sell common shares under Rule 144"

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.

Option Granted financial

"Option Granted - 01/03/2025 listed as source of shares"

Fidelity Brokerage Services LLC other

"Broker/dealer listed as the selling broker at 900 Salem Street"

FAQ

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

What does PTCT's Form 144 filing mean for shareholders?

It notifies the market that an affiliate intends to sell 3,540 shares of common stock on 05/08/2026. This is a regulatory disclosure of a proposed resale under Rule 144; it does not itself report a completed public sale.

Who is selling shares according to the PTCT filing?

The filing identifies an affiliate (through Fidelity Brokerage Services LLC) as the seller of 3,540 shares. It also lists recent sales by Mark Boulding of 2,813, 3,019, and 2,265 shares on the dates shown.

How many shares outstanding does PTCT report in the filing?

The filing lists 82,949,338 shares outstanding as of 05/08/2026. This provides a baseline context for the size of the proposed resale relative to total shares outstanding.

Does the Form 144 show proceeds from recent sales?

Yes; the excerpt lists dollar amounts alongside recent dispositions, for example $157,282.96 tied to 2,265 shares sold on 04/06/2026. These numbers reflect reported sale proceeds in the excerpt.

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

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Accepted by SEC EDGAR 05/08/2026 - 04:15 PM 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	3540	279565.00	82949338	05/08/2026	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	05/08/2026	Option Granted - 01/03/2025	Issuer			3540	05/08/2026	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	02/17/2026	2813	194906.02
Mark Boulding 500 Warren Corporate Center Drive Warren NJ 07059	Common	02/19/2026	3019	209761.74

144: Remarks and Signature

Remarks
Date of Notice	05/08/2026
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/ Daniel Tucci, 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)