Armistice Capital Discloses 5.96% Stake in PTC Therapeutics (PTCT)

Armistice Capital and Steven Boyd report collective ownership of 4,735,464 shares of PTC Therapeutics common stock, representing 5.96% of the class.

Rhea-AI Filing Summary

Armistice Capital and Steven Boyd report collective ownership of 4,735,464 shares of PTC Therapeutics common stock, representing 5.96% of the class. The shares are held by Armistice Capital Master Fund Ltd., for which Armistice Capital acts as investment manager and exercises shared voting and dispositive power. Steven Boyd, as managing member of Armistice Capital, is reported with the same shared voting and dispositive power. The filing states the securities were acquired and are held in the ordinary course of business and not for the purpose of changing or influencing control of the issuer.

Positive

• Armistice Capital reports beneficial ownership of 4,735,464 shares of PTC Therapeutics common stock
• Position represents 5.96% of the outstanding class, a material disclosure level under SEC thresholds
• Filing states shares are held in the ordinary course and not to influence control, clarifying passive intent

Negative

• None.

Insights

Financial Analyst

TL;DR: A 5.96% passive stake disclosed by an investment manager signals notable ownership but no intent to seek control.

Armistice Capital discloses beneficial ownership of 4,735,464 shares (5.96%), held via its Master Fund with Armistice exercising shared voting and dispositive power. This Schedule 13G/A presentation classifies the position as held in the ordinary course and not intended to influence control, which is consistent with passive investor behavior. For investors, a near-6% stake by an active investment manager is material for share-register concentration and potential future engagement, but the filing contains no operative actions or strategic changes.

Corporate Governance Expert

TL;DR: Disclosure clarifies voting and disposition arrangements and confirms the filer is not pursuing control.

The filing attributes shared voting and dispositive power to Armistice Capital and Steven Boyd while the Master Fund is the direct holder. The Master Fund disclaims beneficial ownership by virtue of its agreement with the manager, and the filing includes a certification that the position is not intended to change control. From a governance standpoint, this clarifies roles and responsibilities but does not indicate activism or control-seeking conduct.

FAQ

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

How many PTC Therapeutics (PTCT) shares does Armistice Capital report owning?

The filing reports 4,735,464 shares beneficially owned by the reporting persons.

What percentage of PTCT does the reported stake represent?

The reported stake represents 5.96% of the outstanding common stock, based on the filing's stated share count.

Who holds voting and dispositive power over the reported securities?

Armistice Capital exercises shared voting and shared dispositive power over the securities; Steven Boyd is reported with the same shared powers as managing member.

Are the shares held to influence control of PTC Therapeutics?

No. The filing includes a certification that the securities were acquired and are held in the ordinary course of business and not to change or influence control.

Which entity is the direct holder of the shares reported?

The direct holder is the Armistice Capital Master Fund Ltd., for which Armistice Capital acts as investment manager.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 08/14/2025 - 09:42 PM Learn about SEC filing dates

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 4)

PTC THERAPEUTICS, INC.

(Name of Issuer)

Common Stock, $0.001 par value per share

(Title of Class of Securities)

50127T109

(CUSIP Number)

06/30/2025

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

SCHEDULE 13G

CUSIP No. 50127T109

1

Names of Reporting Persons

Armistice Capital, LLC

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 4,735,464.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 4,735,464.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

4,735,464.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

5.96 %

12

Type of Reporting Person (See Instructions)

IA, OO

SCHEDULE 13G

CUSIP No. 50127T109

1

Names of Reporting Persons

Steven Boyd

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

UNITED STATES

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 4,735,464.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 4,735,464.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

4,735,464.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

5.96 %

12

Type of Reporting Person (See Instructions)

HC, IN

SCHEDULE 13G

Item 1.
(a)	Name of issuer: PTC THERAPEUTICS, INC.
(b)	Address of issuer's principal executive offices: 500 WARREN CORPORATE CENTER DRIVE, WARREN, NJ, 07059
Item 2.
(a)	Name of person filing: Armistice Capital, LLC Steven Boyd Collectively, the "Reporting Persons"
(b)	Address or principal business office or, if none, residence: Armistice Capital, LLC 510 Madison Avenue, 7th Floor New York, New York 10022 United States of America Steven Boyd c/o Armistice Capital, LLC 510 Madison Avenue, 7th Floor New York, New York 10022 United States of America
(c)	Citizenship: Armistice Capital, LLC - Delaware; Steven Boyd - United States of America
(d)	Title of class of securities: Common Stock, $0.001 par value per share
(e)	CUSIP No.: 50127T109
Item 3.	If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
(a)	Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b)	Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)	Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)	Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)	An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
(f)	An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)	A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)	A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)	A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j)	A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J), please specify the type of institution:
(k)	Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
Item 4.	Ownership
(a)	Amount beneficially owned: 4,735,464
(b)	Percent of class: 5.96 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 0
	(ii) Shared power to vote or to direct the vote: 4,735,464
	(iii) Sole power to dispose or to direct the disposition of: 0
	(iv) Shared power to dispose or to direct the disposition of: 4,735,464 The percentage of Shares reported to be beneficially owned by the Reporting Persons are based on 79,257,019. Shares outstanding as of August 5, 2025 as reported on the Issuer's Form 10-Q filed with the Securities and Exchange Commission on August 7, 2025. Armistice Capital, LLC ("Armistice Capital") is the investment manager of Armistice Capital Master Fund Ltd. (the "Master Fund"), the direct holder of the Shares, and pursuant to an Investment Management Agreement, Armistice Capital exercises voting and investment power over the securities of the Issuer held by the Master Fund and thus may be deemed to beneficially own the securities of the Issuer held by the Master Fund. Mr. Boyd, as the managing member of Armistice Capital, may be deemed to beneficially own the securities of the Issuer held by the Master Fund. The Master Fund specifically disclaims beneficial ownership of the securities of the Issuer directly held by it by virtue of its inability to vote or dispose of such securities as a result of its Investment Management Agreement with Armistice Capital.
Item 5.	Ownership of 5 Percent or Less of a Class.
Item 6.	Ownership of more than 5 Percent on Behalf of Another Person.
	If any other person is known to have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, such securities, a statement to that effect should be included in response to this item and, if such interest relates to more than 5 percent of the class, such person should be identified. A listing of the shareholders of an investment company registered under the Investment Company Act of 1940 or the beneficiaries of employee benefit plan, pension fund or endowment fund is not required. The Master Fund, a Cayman Islands exempted company that is an investment advisory client of Armistice Capital, has the right to receive dividends from, or the proceeds from the sale of, the reported securities.
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
	Not Applicable
Item 8.	Identification and Classification of Members of the Group.
	Not Applicable
Item 9.	Notice of Dissolution of Group.
	Not Applicable

Item 10.

Certifications:

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under ?? 240.14a-11.

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

Armistice Capital, LLC

Signature:	/s/ Steven Boyd
Name/Title:	Steven Boyd - Managing Member
Date:	08/14/2025

Steven Boyd

Signature:	/s/ Steven Boyd
Name/Title:	Steven Boyd
Date:	08/14/2025

Exhibit Information

JOINT FILING STATEMENT PURSUANT TO RULE 13d-1(k) The undersigned acknowledge and agree that the foregoing statement on Schedule 13G/A, is filed on behalf of each of the undersigned and that all subsequent amendments to this statement on Schedule 13G/A, shall be filed on behalf of each of the undersigned without the necessity of filing additional joint acquisition statements. The undersigned acknowledge that each shall be responsible for the timely filing of such amendments, and for the completeness and accuracy of the information concerning him or it contained therein, but shall not be responsible for the completeness and accuracy of the information concerning the others, except to the extent that he or it knows or has reason to believe that such information is inaccurate. Dated: August 14, 2025 Armistice Capital, LLC By: /s/ Steven Boyd Steven Boyd - Managing Member Steven Boyd By: /s/ Steven Boyd