PTCT Form 144: Affiliate Plans Stock Option Sale

PTCT affiliate submitted a Form 144 reporting proposed sales of Common Stock by an affiliate and several recent dispositions.

Rhea-AI Filing Summary

PTCT affiliate submitted a Form 144 reporting proposed sales of Common Stock by an affiliate and several recent dispositions. The filing lists a planned sale tied to a Stock Option Exercise on 07/06/2026 and multiple sales by Mark Boulding on 04/06/2026, 05/08/2026, 05/15/2026, and 06/17/2026.

The excerpt shows specific share counts and dollar amounts for those transactions, including 2,265 shares for $157,282.96 on 04/06/2026 and 10,522 shares for $827,607.27 on 06/17/2026.

Insights

Securities Compliance Attorney

Form 144 notifies the market of affiliate sales and a stock option exercise.

Form 144 is a required notice under federal securities law when certain affiliates or control persons propose to sell restricted or control securities; this excerpt lists the proposed sale method as Stock Option Exercise on 07/06/2026.

Cash treatment for the exercise is stated as Cash. Subsequent filings or broker confirmations will show completion; timing and final purchaser details are not included in the excerpt.

Key Figures

Planned exercise date: 07/06/2026 Planned sale quantity (broker line): 5,079 shares Sale — 04/06/2026: 2,265 shares +5 more

8 metrics

Planned exercise date 07/06/2026 Stock Option Exercise listed

Planned sale quantity (broker line) 5,079 shares Securities To Be Sold line shows 5079

Sale — 04/06/2026 2,265 shares Mark Boulding sale on 04/06/2026

Proceeds — 04/06/2026 $157,282.96 Proceeds reported for 2,265 shares on 04/06/2026

Sale — 05/08/2026 3,540 shares Mark Boulding sale on 05/08/2026

Proceeds — 05/08/2026 $279,564.92 Proceeds reported for 3,540 shares on 05/08/2026

Sale — 06/17/2026 10,522 shares Mark Boulding sale on 06/17/2026

Proceeds — 06/17/2026 $827,607.27 Proceeds reported for 10,522 shares on 06/17/2026

Key Terms

Form 144, Stock Option Exercise, Cash

3 terms

Form 144 regulatory

"144: Securities To Be Sold"

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 | 07/06/2026 | Stock Option Exercise"

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.

Cash financial

"5079 | 07/06/2026 | Cash"

FAQ

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

What does PTCT's Form 144 report?

The Form 144 reports proposed sales of Common Stock by an affiliate and recent dispositions by Mark Boulding. It lists a stock option exercise on 07/06/2026 and multiple sales on 04/06/2026, 05/08/2026, 05/15/2026, and 06/17/2026.

How many shares did Mark Boulding sell on 06/17/2026 (PTCT)?

On 06/17/2026, Mark Boulding sold 10,522 shares for $827,607.27. The filing provides each sale's share count and gross dollar amount for the listed dates.

What method is used for the planned sale in PTCT's filing?

The planned sale method is listed as a Stock Option Exercise scheduled on 07/06/2026. The excerpt also indicates the exercise will be settled in Cash.

Who is the broker/dealer handling the transactions in the PTCT excerpt?

The excerpt names Fidelity Brokerage Services LLC at 900 Salem Street, Smithfield RI, as a securities line in the filing. The broker entry includes numerical references shown in the excerpt.

Do these Form 144 entries confirm completed sales for PTCT?

The Form 144 lists proposed and recent sales dates and amounts but does not itself confirm settlement. Broker confirmations or subsequent filings are required to verify completed transactions.

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

See more from StockTitan in Google Search and AI answers. Adds StockTitan as a preferred source · opens Google

Add on Google Not now

Accepted by SEC EDGAR 07/06/2026 - 03:17 PM 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	5079	427321.67	82949338	07/06/2026	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	07/06/2026	Stock Option Exercise	Issuer			5079	07/06/2026	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
Mark Boulding 500 Warren Corporate Center Drive Warren NJ 07059	Common	05/15/2026	2812	202964.54
Mark Boulding 500 Warren Corporate Center Drive Warren NJ 07059	Common	06/17/2026	10522	827607.27

144: Remarks and Signature

Remarks
Date of Notice	07/06/2026
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/ Jennifer Ruchti, 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)