Mark Elliott Boulding - 06 Jan 2026 Form 4 Insider Report for PTC THERAPEUTICS, INC. (PTCT)

Role
EXEC. VP AND CLO
Signature
/s/ Avraham S. Adler, Attorney-in-Fact
Issuer symbol
PTCT
Transactions as of
06 Jan 2026
Net transactions value
-$383,016
Form type
4
Filing time
08 Jan 2026, 17:20:08 UTC
Previous filing
06 Jan 2026
Next filing
12 Jan 2026
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Boulding Mark Elliott EXEC. VP AND CLO C/O PTC THERAPEUTICS, INC., 500 WARREN CORPORATE CENTER DRIVE, WARREN /s/ Avraham S. Adler, Attorney-in-Fact 08 Jan 2026 0001578852

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction PTCT Common Stock Sale $133,816 -1,739 -1.4% $76.95 119,162 06 Jan 2026 Direct F1
transaction PTCT Common Stock Sale $116,452 -1,503 -1.3% $77.48 117,659 07 Jan 2026 Direct F2
transaction PTCT Common Stock Options Exercise $100,012 +2,625 +2.2% $38.10 120,284 07 Jan 2026 Direct F3
transaction PTCT Common Stock Sale $126,306 -1,638 -1.4% $77.11 118,646 07 Jan 2026 Direct F3, F4
transaction PTCT Common Stock Sale $73,937 -949 -0.8% $77.91 117,697 07 Jan 2026 Direct F3, F5
transaction PTCT Common Stock Sale $2,987 -38 -0.03% $78.60 117,659 07 Jan 2026 Direct F3
transaction PTCT Common Stock Options Exercise $28,613 +751 +0.64% $38.10 118,410 07 Jan 2026 Direct F3
transaction PTCT Common Stock Sale $36,314 -471 -0.4% $77.10 117,939 07 Jan 2026 Direct F3, F6
transaction PTCT Common Stock Sale $20,960 -269 -0.23% $77.92 117,670 07 Jan 2026 Direct F3, F7
transaction PTCT Common Stock Sale $869 -11 -0.01% $78.98 117,659 07 Jan 2026 Direct F3

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Underlying Class Amount Exercise Price Ownership Footnotes
transaction PTCT Stock Option (Right to Buy) Options Exercise $0 -2,625 -78% $0.000000 751 07 Jan 2026 Common Stock 2,627 $38.10 Direct F3, F8
transaction PTCT Stock Option (Right to Buy) Options Exercise $0 -751 -100% $0.000000 0 07 Jan 2026 Common Stock 751 $38.10 Direct F3, F8
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Buy Plan / Sale Plan: These are also open market purchases/sales of shares, but in this case the transaction is part of a trading plan. Rule 10b5-1 allows insiders to setup a trading plan to buy/sell stocks over a certain period of time. Since the purchases/sales are predetermined, this protects the insiders from violating insider trading law.

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).

Explanation of Responses:

Id Content
F1 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 4,500 RSUs from a January 3, 2025 grant of 18,000 RSUs.
F2 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 4,250 RSUs from a January 5, 2023 grant of 17,000 RSUs.
F3 This transaction was effected pursuant to a written Rule 10b5-1 plan adopted by the Reporting Person on December 4, 2024.
F4 This price represents the weighted average price of sale transactions that were executed in multiple trades at prices ranging from $76.56 to $77.55 per share. The Reporting Person hereby undertakes, upon request by the SEC staff, the issuer or a security holder of the issuer, to provide full information regarding the number of shares sold at each separate price.
F5 This price represents the weighted average price of sale transactions that were executed in multiple trades at prices ranging from $77.58 to $78.54 per share. The Reporting Person hereby undertakes, upon request by the SEC staff, the issuer or a security holder of the issuer, to provide full information regarding the number of shares sold at each separate price.
F6 This price represents the weighted average price of sale transactions that were executed in multiple trades at prices ranging from $76.54 to $77.52 per share. The Reporting Person hereby undertakes, upon request by the SEC staff, the issuer or a security holder of the issuer, to provide full information regarding the number of shares sold at each separate price.
F7 This price represents the weighted average price of sale transactions that were executed in multiple trades at prices ranging from $77.54 to $78.47 per share. The Reporting Person hereby undertakes, upon request by the SEC staff, the issuer or a security holder of the issuer, to provide full information regarding the number of shares sold at each separate price.
F8 Currently exercisable.