PTC Therapeutics (PTCT) CMO executes 829-share tax sell-to-cover

Rhea-AI Filing Summary

PTC Therapeutics, Inc. executive Lee Scott Golden reported an automatic sale of 829 shares of Common Stock at $67.99 per share. According to the disclosure, these shares were sold pursuant to an irrevocable sell-to-cover election to satisfy tax withholding obligations tied to the vesting of 2,100 restricted stock units (RSUs) from an April 24, 2023 grant of 8,400 RSUs. Following this tax-related sale, Golden directly holds 79,115 shares of PTC Therapeutics common stock, so the transaction represents a small portion of his overall reported holdings.

Insider Trade Summary 10b5-1

Net Seller: 829 shares ($56,364)

Net Sell 1 txn

Insider Golden Lee Scott

Role EVP & CHIEF MEDICAL OFFICER

Sold 829 shs ($56K)

Type	Security	Shares	Price	Value
Sale	Common Stock	829	$67.99	$56K

Holdings After Transaction: Common Stock — 79,115 shares (Direct)

Footnotes (1)

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Key Figures

Shares sold: 829 shares Sale price: $67.99 per share Post-transaction holdings: 79,115 shares +2 more

5 metrics

Shares sold 829 shares Automatic sell-to-cover on April 2, 2026

Sale price $67.99 per share Price for the 829 shares sold

Post-transaction holdings 79,115 shares Common Stock held directly after transaction

RSUs vested 2,100 RSUs Vesting from April 24, 2023 grant

Original RSU grant 8,400 RSUs Grant dated April 24, 2023

Key Terms

sell to cover, RSUs, tax withholding obligations

3 terms

sell to cover financial

"Represents shares automatically sold pursuant to an irrevocable sell to cover election"

Sell to cover is when a person who receives company stock through options or awards sells just enough shares immediately to pay required taxes, exercise costs, or fees, keeping the rest. Think of it like cashing part of a bonus to cover the tax bill so you can keep the remainder. For investors, it can create predictable small selling pressure and slightly change the number of shares actually held by insiders without increasing long‑term dilution.

RSUs financial

"in connection with the vesting of 2,100 RSUs from an April 24, 2023 grant of 8,400 RSUs"

RSUs, or restricted stock units, are a form of company shares given to employees as part of their compensation. They are typically awarded with certain restrictions, such as a waiting period before they can be fully owned or sold, similar to earning a gift that becomes fully yours over time. For investors, RSUs can impact a company's stock offerings and reflect how much the company relies on stock-based incentives to attract and retain talent.

tax withholding obligations financial

"to satisfy tax withholding obligations in connection with the vesting of 2,100 RSUs"

Form 4 Insider Transactions: What Each Field Means →

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

X

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Golden Lee Scott

(Last) (First) (Middle)

C/O PTC THERAPEUTICS, INC.

500 WARREN CORPORATE CENTER DRIVE

(Street)

WARREN NEW JERSEY 07059

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
PTC THERAPEUTICS, INC. [ PTCT ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	EVP & CHIEF MEDICAL OFFICER

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
04/02/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	04/02/2026		S(1)		829	D	$67.99	79,115	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. Represents shares automatically sold pursuant to an irrevocable sell to cover election entered into upon acceptance of the grant to satisfy tax withholding obligations in connection with the vesting of 2,100 RSUs from an April 24, 2023 grant of 8,400 RSUs.

	/s/ Avraham S. Adler, Attorney-in-Fact	04/06/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)

FAQ

What insider transaction did PTC Therapeutics (PTCT) report for Lee Scott Golden?

PTC Therapeutics reported that EVP & Chief Medical Officer Lee Scott Golden had 829 shares of Common Stock sold at $67.99 per share. The shares were sold automatically to cover tax withholding obligations from the vesting of 2,100 RSUs granted in April 2023.

Was the PTCT insider sale by Lee Scott Golden a discretionary sale or tax-related?

The 829-share sale reported for Lee Scott Golden was tax-related, not discretionary. It was executed automatically under an irrevocable sell-to-cover election to satisfy tax withholding obligations arising from the vesting of 2,100 RSUs from an April 24, 2023 grant.

How many PTCT shares does Lee Scott Golden hold after the reported transaction?

After the reported transaction, Lee Scott Golden directly holds 79,115 shares of PTC Therapeutics Common Stock. The 829 shares sold to cover taxes represent a small fraction of his total reported holdings, indicating this was primarily a routine tax-withholding event.

What RSU grant is connected to the PTCT insider tax-related sale?

The tax-related sale is tied to an April 24, 2023 grant of 8,400 RSUs to Lee Scott Golden. On the transaction date, 2,100 of those RSUs vested, and an automatic sell-to-cover mechanism sold 829 shares to satisfy associated tax withholding obligations.

At what price were the PTCT shares sold in Lee Scott Golden’s Form 4 filing?

The 829 PTCT Common Stock shares associated with Lee Scott Golden’s Form 4 filing were sold at $67.99 per share. This price applies to the automatic sell-to-cover transaction executed to meet tax withholding obligations related to the vesting of 2,100 RSUs.