PTC Therapeutics insider plans $201,692 stock sale

PTC Therapeutics insider Mark Boulding filed a notice to sell 2,813 shares of common stock on or after August 17, 2026, following a stock option exercise for cash.

Rhea-AI Filing Summary

PTC Therapeutics insider Mark Boulding filed a notice to sell 2,813 shares of common stock on or after August 17, 2026, following a stock option exercise for cash. The shares are held at Fidelity Brokerage Services and are listed on NASDAQ. The filing also lists prior sales of common stock during the past three months.

Those earlier transactions include 10,522 shares sold on June 17, 2026 and 5,079 shares sold on July 6, 2026, with the filing reporting the corresponding dollar values for each sale.

Key Figures

Planned shares to be sold: 2,813 shares Aggregate value of planned sale: $201,692.10 Shares sold June 17, 2026: 10,522 shares +4 more

7 metrics

Planned shares to be sold 2,813 shares Common stock covered by the Form 144 notice

Aggregate value of planned sale $201,692.10 Reported value for the 2,813 shares of common stock

Shares sold June 17, 2026 10,522 shares Securities sold during the past 3 months

Value of June 17, 2026 sale $827,606.93 Dollar amount for 10,522 shares sold

Shares sold July 6, 2026 5,079 shares Second reported sale during the past 3 months

Value of July 6, 2026 sale $432,116.62 Dollar amount for 5,079 shares sold

Planned sale date 08/17/2026 Date tied to the proposed sale and option exercise

Key Terms

Form 144, Stock Option Exercise, Securities To Be Sold, Securities Sold During The Past 3 Months

4 terms

Form 144 regulatory

"144: Securities Information Common | Fidelity Brokerage Services LLC"

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.

Stock Option Exercise financial

"Common | 08/17/2026 | Stock Option Exercise | Issuer"

A stock option exercise is the act of using a previously granted right to buy shares of a company's stock at a specific, predetermined price by paying that price and receiving the shares. It matters to investors because exercising changes who owns the shares (which can dilute existing ownership), can trigger taxable events and shift potential gains or losses, and affects voting power and the company’s outstanding share count—like turning a voucher into an actual product that becomes part of circulating supply.

Securities To Be Sold regulatory

"144: Securities To Be Sold Common | 08/17/2026"

Securities Sold During The Past 3 Months regulatory

"144: Securities Sold During The Past 3 Months Mark Boulding"

FAQ

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

What does PTCT insider Mark Boulding report in this Form 144 filing?

Mark Boulding reports an intent to sell 2,813 shares of PTCT common stock following a stock option exercise. The notice also discloses earlier stock sales over the past three months with related share counts and dollar amounts.

How many PTCT shares are planned to be sold under this Form 144?

The filing reports a planned sale of 2,813 shares of PTCT common stock. These shares are associated with a stock option exercise for cash and are held through Fidelity Brokerage Services, with the security listed on NASDAQ.

What prior PTCT stock sales by Mark Boulding are disclosed in this Form 144?

The filing lists two recent sales: 10,522 shares on June 17, 2026 for $827,606.93, and 5,079 shares on July 6, 2026 for $432,116.62. These are reported as securities sold during the past three months.

What is the aggregate value of PTCT shares in the planned Form 144 sale?

The notice shows an aggregate value of $201,692.10 for the 2,813 PTCT shares proposed to be sold. This value relates to the common stock position held at Fidelity Brokerage Services and listed on NASDAQ.

How were the PTCT shares to be sold under this Form 144 acquired?

The shares covered by the Form 144 are linked to a Stock Option Exercise from the issuer for cash on August 17, 2026. The filing describes this as the method by which these common shares were acquired.

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

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Available on EDGAR 08/17/2026 - 11:21 AM Accepted by SEC EDGAR 08/17/2026 - 11:20 AM 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	2813	201692.10	83460802	08/17/2026	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	08/17/2026	Stock Option Exercise	Issuer			2813	08/17/2026	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	06/17/2026	10522	827606.93
Mark Boulding 500 Warren Corporate Center Drive Warren NJ 07059	Common	07/06/2026	5079	432116.62

144: Remarks and Signature

Remarks
Date of Notice	08/17/2026
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)