PTCT Form 144: Insider sales and restricted vesting

PTCT Rule 144 notice reporting proposed and recent transactions in Common Stock.

Rhea-AI Filing Summary

PTCT Rule 144 notice reporting proposed and recent transactions in Common Stock. The filing shows two restricted stock vesting events of 4,384 shares on 12/01/2025 and 5,616 shares on 12/29/2025. It also discloses three market sales by Matthew Klein during the prior three months: 7,371 shares for $511,227.50 on 02/18/2026, 2,662 shares for $170,572.44 on 03/12/2026, and 2,850 shares for $202,171.31 on 04/21/2026.

Insights

Securities Counsel

Rule 144 notice lists vesting and recent dispositions by an affiliated holder.

The filing records two restricted stock vesting events totaling 9,999 shares by issuer-sourced grants on 12/01/2025 and 12/29/2025. The document separately lists three open-market sales by Matthew Klein in Feb–Apr 2026 with exact share counts and gross proceeds.

These entries are procedural: they notify the market of vesting and reported sales under Rule 144. Filing does not state whether remaining lock-up, holding period, or volume limits apply beyond the listed trades; subsequent filings would show any additional transactions.

Key Figures

Restricted shares vested: 4,384 shares Restricted shares vested: 5,616 shares Sale by Matthew Klein: 7,371 shares +2 more

5 metrics

Restricted shares vested 4,384 shares vested on 12/01/2025

Restricted shares vested 5,616 shares vested on 12/29/2025

Sale by Matthew Klein 7,371 shares sold on 02/18/2026 for $511,227.50

Sale by Matthew Klein 2,662 shares sold on 03/12/2026 for $170,572.44

Sale by Matthew Klein 2,850 shares sold on 04/21/2026 for $202,171.31

Key Terms

Rule 144, Restricted Stock Vesting, Issuer

3 terms

Rule 144 regulatory

"144: Securities To Be Sold"

Rule 144 is a U.S. securities regulation that sets conditions under which restricted or insider-held shares can be legally resold to the public, such as required holding periods, availability of public information, limits on how much can be sold at once, and certain filing requirements. For investors it matters because it determines when previously locked-up shares can enter the market — like a release valve that can increase supply, affect share price, and signal insider intent.

Restricted Stock Vesting financial

"Common | 12/01/2025 | Restricted Stock Vesting"

Restricted stock vesting is the timetable and conditions under which shares granted to employees or insiders become fully owned and can be sold, typically requiring continued work or meeting performance goals. It matters to investors because large blocks of shares can become tradable at once, which can change share supply and price, and because vesting aligns insiders’ incentives with the company’s long‑term performance—think of it like a timed unlock that both rewards and locks in key people.

Issuer legal

"Restricted Stock Vesting | Issuer"

FAQ

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

What does PTCT's Form 144 disclose about recent insider sales?

The Form 144 reports three sales by Matthew Klein: 7,371 shares for $511,227.50 on 02/18/2026, 2,662 shares for $170,572.44 on 03/12/2026, and 2,850 shares for $202,171.31 on 04/21/2026. These are the exact transactions listed in the excerpt.

Does the filing show any recent vesting of PTCT restricted stock?

Yes. The excerpt shows two restricted stock vesting events: 4,384 shares vested on 12/01/2025 and 5,616 shares vested on 12/29/2025. Both are labeled as Issuer compensation vesting.

Who is the reported seller in the Form 144 excerpt for PTCT?

The reported seller named in the sales table is Matthew Klein with an address shown as 500 Warren Corporate Center Drive, Warren, NJ. His three listed dispositions include share counts and gross proceeds for each trade.

Are proceeds or prices provided for the reported PTCT sales?

Yes. The filing lists gross proceeds for each sale: $511,227.50, $170,572.44, and $202,171.31 tied to the respective share counts and trade dates shown in the excerpt.

Does this Form 144 state any sale limitations or holding‑period status?

The provided excerpt does not include explicit language about holding‑period status, volume limitations, or the applicability of Rule 144 safe-harbors; such qualifiers are not shown in the visible content.

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 05/14/2026 - 12:43 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	0001808968
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	Klein Matthew B.
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
Relationship to Issuer	Director

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	10000	730769.00	82949338	05/14/2026	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	12/01/2025	Restricted Stock Vesting	Issuer			4384	12/01/2025	Compensation
Common	12/29/2025	Restricted Stock Vesting	Issuer			5616	12/29/2025	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
Matthew Klein 500 Warren Corporate Center Drive Warren NJ 07059	Common	02/18/2026	7371	511227.50
Matthew Klein 500 Warren Corporate Center Drive Warren NJ 07059	Common	03/12/2026	2662	170572.44
Matthew Klein 500 Warren Corporate Center Drive Warren NJ 07059	Common	04/21/2026	2850	202171.31

144: Remarks and Signature

Remarks
Date of Notice	05/14/2026
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/Wade Moss, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Matthew Klein
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)