PTCT insider files Form 144 to sell 10,522 shares

PTCT insider filing reports a proposed sale of 10,522 shares via a stock option exercise on 06/17/2026.

Rhea-AI Filing Summary

PTCT insider filing reports a proposed sale of 10,522 shares via a stock option exercise on 06/17/2026. The filing also lists prior dispositions by Mark Boulding of 2,265, 3,540 and 2,812 shares on 04/06/2026, 05/08/2026 and 05/15/2026, respectively. The exercise method is listed as cash.

Insights

Securities Attorney

Form 144 notice for a stock option exercise and recent insider dispositions.

The filing lists a proposed sale of 10,522 shares by means described as a Stock Option Exercise to occur on 06/17/2026, with the method noted as Cash. The filing separately itemizes three prior dispositions by Mark Boulding totaling 8,617 shares across 04/06/2026, 05/08/2026, and 05/15/2026

Form 144 is a regulatory notice of proposed sale under the securities laws; the filing lists transaction mechanics and dates but does not itself confirm completed market sales. Subsequent trade reports or Forms 4/5 would show completed transactions and resulting holdings.

Key Figures

Proposed shares to be sold: 10,522 shares Prior disposition: 2,265 shares Prior disposition: 3,540 shares +2 more

5 metrics

Proposed shares to be sold 10,522 shares Stock Option Exercise on <date>06/17/2026</date>

Prior disposition 2,265 shares Sold by Mark Boulding on <date>04/06/2026</date>

Prior disposition 3,540 shares Sold by Mark Boulding on <date>05/08/2026</date>

Prior disposition 2,812 shares Sold by Mark Boulding on <date>05/15/2026</date>

Aggregate prior dispositions (sum of listed rows) 8,617 shares Aggregate of the three listed dispositions in the filing

Key Terms

Form 144, Stock Option Exercise, Securities To Be Sold

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 | 06/17/2026 | 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"

FAQ

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

What does the PTCT Form 144 report say?

The filing reports a proposed sale of 10,522 shares by stock option exercise on 06/17/2026, and prior dispositions of 2,265, 3,540, and 2,812 shares on the listed spring 2026 dates.

Who made recent sales reported for PTCT?

The filing shows recent dispositions by Mark Boulding of 2,265, 3,540, and 2,812 shares on 04/06/2026, 05/08/2026, and 05/15/2026, respectively, with dollar values listed alongside each trade.

How will the 10,522 shares for PTCT be issued or sold?

The entry describes the 10,522 shares as resulting from a Stock Option Exercise and lists Cash as the payment method, dated 06/17/2026. The filing lists mechanics, not execution confirmation.

Does Form 144 mean the shares were already sold?

A Form 144 is a notice of proposed sale under securities rules. It lists the intended sale method and date (06/17/2026) but does not by itself prove the shares were sold in the market.

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 06/17/2026 - 04:09 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	10522	827606.93	82949338	06/17/2026	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	06/17/2026	Stock Option Exercise	Issuer			10522	06/17/2026	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	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

144: Remarks and Signature

Remarks
Date of Notice	06/17/2026
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)