[144] PTC Therapeutics, Inc. SEC Filing

Rhea-AI Filing Summary

PTC Therapeutics (PTCT) filed a Form 144 notifying the proposed sale of 2,813 common shares held at Fidelity Brokerage Services, with an aggregate market value of $136,646.45, and an approximate sale date of 08/15/2025 on NASDAQ. The shares were acquired on 08/15/2025 via an option granted 02/15/2024 and payment will be in cash. The filing also lists two prior sales by the same person in May 2025 totaling 2,812 shares for gross proceeds of $129,715.92. The filer affirms no undisclosed material adverse information.

Positive

• Disclosure compliance: The filer submitted a Form 144 detailing the proposed sale, acquisition source, broker, and approximate sale date.
• Transaction transparency: Includes prior sales in May 2025, showing recent disposition history rather than a single undisclosed event.

Negative

• Insider sale: The person intends to sell 2,813 shares, which may be viewed negatively by some investors despite small size.
• Concentration of holdings: All reported shares are held at a single broker (Fidelity Brokerage Services LLC), which could concentrate execution risk.

Insights

Securities Analyst

TL;DR: Insider plans a modest sale of 2,813 shares, previously sold ~2,812 shares in May; likely limited market impact.

The filing documents a planned sale tied to an option exercise and subsequent cash sale of 2,813 common shares valued at $136,646.45. Recent sales in May of similar aggregate size suggest this is personal liquidity rather than a signal of company-wide issues. The quantity represents a very small portion of the outstanding share count (2,813 of 79,438,094), so market and valuation impact should be minimal. Compliance with Rule 144 is properly documented.

Corporate Governance Expert

TL;DR: Documentation appears complete and includes the required insider representation; no governance red flags disclosed.

The Form 144 includes acquisition details, broker information, and recent disposition history, and the signer affirms absence of undisclosed material information. The sale stems from stock options granted in 2024 and is scheduled for August 15, 2025. From a governance perspective, the filing is routine and transparent; it does not disclose any departures, related-party transactions, or compliance exceptions.

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
Filer CCC
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer

SEC File Number

Address of Issuer

Phone

Name of Person for Whose Account the Securities are To Be Sold

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

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	136646.45	79438094	08/15/2025	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	08/15/2025	Option Granted - 02/15/2024	Issuer			2813	08/15/2025	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	05/15/2025	1929	89076.20
Mark Boulding 500 Warren Corporate Center Drive Warren NJ 07059	Common	05/16/2025	883	40639.72

144: Remarks and Signature

Remarks

Date of Notice

Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1

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

ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)

FAQ

What does the PTCT Form 144 report?

The filing reports a proposed sale of 2,813 PTCT common shares with aggregate market value of $136,646.45, expected on 08/15/2025 on NASDAQ.

Who is the broker handling the sale in the PTCT filing?

The broker listed is Fidelity Brokerage Services LLC, 900 Salem Street, Smithfield RI.

How and when were the shares being sold acquired?

The shares were acquired on 08/15/2025 via an option granted on 02/15/2024, and the planned payment method is cash.

Has the filer sold PTCT shares recently?

Yes; the filing lists two sales in May 2025: 1,929 shares on 05/15/2025 for $89,076.20 and 883 shares on 05/16/2025 for $40,639.72.

How large is the proposed sale relative to outstanding shares?

The proposed 2,813 shares compare to 79,438,094 shares outstanding, representing a very small fraction of total shares.