Insider plans common stock sale under Rule 144

A holder named Mark Boulding has filed a notice under Rule 144 to sell 2,747 shares of common stock through Fidelity Brokerage Services LLC, with an aggregate market value of 210,447.74.

Rhea-AI Filing Summary

A holder named Mark Boulding has filed a notice under Rule 144 to sell 2,747 shares of common stock through Fidelity Brokerage Services LLC, with an aggregate market value of 210,447.74. The shares are listed on NASDAQ and the approximate sale date is 01/08/2026.

The 2,747 shares were acquired on 01/05/2026 via restricted stock vesting from the issuer as compensation. Over the prior three months, the same seller disposed of common shares in multiple transactions: 2,812 shares on 11/17/2025, 2,266 shares on 01/05/2026, 1,739 shares on 01/06/2026, and 4,879 shares on 01/07/2026, for gross proceeds of 213,690.35, 171,190.18, 133,811.88, and 377,839.55, respectively.

FAQ

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

What does this Rule 144 notice for PTCT relate to?

It discloses that Mark Boulding plans to sell 2,747 shares of common stock on NASDAQ through Fidelity Brokerage Services LLC under Rule 144.

How many PTCT shares are planned to be sold in the new transaction?

The notice states that 2,747 shares of common stock are to be sold, with an aggregate market value of 210,447.74.

How were the PTCT shares being sold under Rule 144 acquired?

The 2,747 shares were acquired on 01/05/2026 via restricted stock vesting from the issuer as compensation.

What recent PTCT share sales has the filer reported in the last 3 months?

The filer reported selling common shares on four dates: 2,812 shares on 11/17/2025, 2,266 on 01/05/2026, 1,739 on 01/06/2026, and 4,879 on 01/07/2026.

What gross proceeds did the seller receive from recent PTCT share sales?

The filing lists gross proceeds of 213,690.35, 171,190.18, 133,811.88, and 377,839.55 from the four recent common stock sales.

Which broker is handling the planned PTCT Rule 144 sale?

The planned sale of 2,747 common shares will be handled by Fidelity Brokerage Services LLC, located in Smithfield, Rhode Island.

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

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Accepted by SEC EDGAR 01/08/2026 - 04:10 PM EST 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	2747	210447.74	80288305	01/08/2026	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	01/05/2026	Restricted Stock Vesting	Issuer			2747	01/05/2026	Compensation

* 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	11/17/2025	2812	213690.35
Mark Boulding 500 Warren Corporate Center Drive Warren NJ 07059	Common	01/05/2026	2266	171190.18
Mark Boulding 500 Warren Corporate Center Drive Warren NJ 07059	Common	01/06/2026	1739	133811.88
Mark Boulding 500 Warren Corporate Center Drive Warren NJ 07059	Common	01/07/2026	4879	377839.55

144: Remarks and Signature

Remarks
Date of Notice	01/08/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	12/04/2024
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)