SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
SCHEDULE 13D
Under the Securities Exchange Act of 1934
(Amendment No. 9)*
Enzon Pharmaceuticals, Inc.
(Name of Issuer)
Common Stock, Par Value $0.01
(Title of Class of Securities)
293904108
(CUSIP Number)
Jesse Lynn, Esq.
Icahn Capital LP
767 Fifth Avenue, 47th Floor
New York, New York 10153
(212) 702-4300
(Name, Address and Telephone Number of Person Authorized to
Receive Notices and Communications)
November 28, 2016
(Date of Event which Requires Filing of this Statement)
If the filing person has previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule because of Section 240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the following box / /.
NOTE: Schedules filed in paper format shall include a signed original and five copies of the schedule, including all exhibits. See Rule 13d‑7 for other parties to whom copies are to be sent.
*The remainder of this cover page shall be filled out for a reporting person's initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter disclosures provided in a prior cover page.
The information required on the remainder of this cover page shall not be deemed to be "filed" for the purpose of Section 18 of the Securities Exchange Act of 1934 ("Act") or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).
SCHEDULE 13D
CUSIP No. 293904108
1 NAME OF REPORTING PERSON
High River Limited Partnership
2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
(a) / /
(b) / /
3 SEC USE ONLY
4 SOURCE OF FUNDS
WC
| 5 |
CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) or 2(e)/ /
|
6 CITIZENSHIP OR PLACE OF ORGANIZATION
Delaware
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH:
7 SOLE VOTING POWER
1,319,777
8 SHARED VOTING POWER
0
9 SOLE DISPOSITIVE POWER
1,319,777
10 SHARED DISPOSITIVE POWER
0
11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
1,319,777
| 12 |
CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES/ /
|
13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
2.98%
14 TYPE OF REPORTING PERSON
PN
SCHEDULE 13D
CUSIP No. 293904108
1 NAME OF REPORTING PERSON
Hopper Investments LLC
2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
(a) / /
(b) / /
3 SEC USE ONLY
4 SOURCE OF FUNDS
OO
| 5 |
CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) or 2(e)/ /
|
6 CITIZENSHIP OR PLACE OF ORGANIZATION
Delaware
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH:
7 SOLE VOTING POWER
0
8 SHARED VOTING POWER
1,319,777
9 SOLE DISPOSITIVE POWER
0
10 SHARED DISPOSITIVE POWER
1,319,777
11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
1,319,777
| 12 |
CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES/ /
|
13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
2.98%
14 TYPE OF REPORTING PERSON
OO
SCHEDULE 13D
CUSIP No. 293904108
1 NAME OF REPORTING PERSON
Barberry Corp.
2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
(a) / /
(b) / /
3 SEC USE ONLY
4 SOURCE OF FUNDS
OO
| 5 |
CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) or 2(e)/ /
|
6 CITIZENSHIP OR PLACE OF ORGANIZATION
Delaware
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH:
7 SOLE VOTING POWER
0
8 SHARED VOTING POWER
1,319,777
9 SOLE DISPOSITIVE POWER
0
10 SHARED DISPOSITIVE POWER
1,319,777
11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
1,319,777
| 12 |
CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES/ /
|
13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
2.98%
14 TYPE OF REPORTING PERSON
CO
SCHEDULE 13D
CUSIP No. 293904108
1 NAME OF REPORTING PERSON
Icahn Partners Master Fund LP
2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
(a) / /
(b) / /
3 SEC USE ONLY
4 SOURCE OF FUNDS
WC
| 5 |
CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) or 2(e)/ /
|
6 CITIZENSHIP OR PLACE OF ORGANIZATION
Delaware
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH:
7 SOLE VOTING POWER
2,147,937
8 SHARED VOTING POWER
0
9 SOLE DISPOSITIVE POWER
2,147,937
10 SHARED DISPOSITIVE POWER
0
11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
2,147,937
| 12 |
CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES/ /
|
13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
4.86%
14 TYPE OF REPORTING PERSON
PN
SCHEDULE 13D
CUSIP No. 293904108
1 NAME OF REPORTING PERSON
Icahn Offshore LP
2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
(a) / /
(b) / /
3 SEC USE ONLY
4 SOURCE OF FUNDS
OO
| 5 |
CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) or 2(e)/ /
|
6 CITIZENSHIP OR PLACE OF ORGANIZATION
Delaware
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH:
7 SOLE VOTING POWER
0
8 SHARED VOTING POWER
2,147,937
9 SOLE DISPOSITIVE POWER
0
10 SHARED DISPOSITIVE POWER
2,147,937
11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
2,147,937
| 12 |
CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES/ /
|
13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
4.86%
14 TYPE OF REPORTING PERSON
PN
SCHEDULE 13D
CUSIP No. 293904108
1 NAME OF REPORTING PERSON
Icahn Partners LP
2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
(a) / /
(b) / /
3 SEC USE ONLY
4 SOURCE OF FUNDS
WC
| 5 |
CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) or 2(e)/ /
|
6 CITIZENSHIP OR PLACE OF ORGANIZATION
Delaware
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH:
7 SOLE VOTING POWER
3,131,172
8 SHARED VOTING POWER
0
9 SOLE DISPOSITIVE POWER
3,131,172
10 SHARED DISPOSITIVE POWER
0
11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
3,131,172
| 12 |
CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES/ /
|
13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
7.08%
14 TYPE OF REPORTING PERSON
PN
SCHEDULE 13D
CUSIP No. 293904108
1 NAME OF REPORTING PERSON
Icahn Onshore LP
2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
(a) / /
(b) / /
3 SEC USE ONLY
4 SOURCE OF FUNDS
OO
| 5 |
CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) or 2(e)/ /
|
6 CITIZENSHIP OR PLACE OF ORGANIZATION
Delaware
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH:
7 SOLE VOTING POWER
0
8 SHARED VOTING POWER
3,131,172
9 SOLE DISPOSITIVE POWER
0
10 SHARED DISPOSITIVE POWER
3,131,172
11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
3,131,172
| 12 |
CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES/ /
|
13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
7.08%
14 TYPE OF REPORTING PERSON
PN
SCHEDULE 13D
CUSIP No. 293904108
1 NAME OF REPORTING PERSON
Icahn Capital LP
2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
(a) / /
(b) / /
3 SEC USE ONLY
4 SOURCE OF FUNDS
OO
| 5 |
CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) or 2(e)/ /
|
6 CITIZENSHIP OR PLACE OF ORGANIZATION
Delaware
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH:
7 SOLE VOTING POWER
0
8 SHARED VOTING POWER
5,279,109
9 SOLE DISPOSITIVE POWER
0
10 SHARED DISPOSITIVE POWER
5,279,109
11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
5,279,109
| 12 |
CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES/ /
|
13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
11.94%
14 TYPE OF REPORTING PERSON
PN
SCHEDULE 13D
CUSIP No. 293904108
1 NAME OF REPORTING PERSON
IPH GP LLC
2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
(a) / /
(b) / /
3 SEC USE ONLY
4 SOURCE OF FUNDS
OO
| 5 |
CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) or 2(e)/ /
|
6 CITIZENSHIP OR PLACE OF ORGANIZATION
Delaware
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH:
7 SOLE VOTING POWER
0
8 SHARED VOTING POWER
5,279,109
9 SOLE DISPOSITIVE POWER
0
10 SHARED DISPOSITIVE POWER
5,279,109
11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
5,279,109
| 12 |
CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES/ /
|
13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
11.94%
14 TYPE OF REPORTING PERSON
OO
SCHEDULE 13D
CUSIP No. 293904108
1 NAME OF REPORTING PERSON
Icahn Enterprises Holdings L.P.
2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
(a) / /
(b) / /
3 SEC USE ONLY
4 SOURCE OF FUNDS
OO
| 5 |
CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) or 2(e)/ /
|
6 CITIZENSHIP OR PLACE OF ORGANIZATION
Delaware
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH:
7 SOLE VOTING POWER
0
8 SHARED VOTING POWER
5,279,109
9 SOLE DISPOSITIVE POWER
0
10 SHARED DISPOSITIVE POWER
5,279,109
11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
5,279,109
| 12 |
CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES/ /
|
13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
11.94%
14 TYPE OF REPORTING PERSON
PN
SCHEDULE 13D
CUSIP No. 293904108
1 NAME OF REPORTING PERSON
Icahn Enterprises G.P. Inc.
2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
(a) / /
(b) / /
3 SEC USE ONLY
4 SOURCE OF FUNDS
OO
| 5 |
CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) or 2(e)/ /
|
6 CITIZENSHIP OR PLACE OF ORGANIZATION
Delaware
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH:
7 SOLE VOTING POWER
0
8 SHARED VOTING POWER
5,279,109
9 SOLE DISPOSITIVE POWER
0
10 SHARED DISPOSITIVE POWER
5,279,109
11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
5,279,109
| 12 |
CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES/ /
|
13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
11.94%
14 TYPE OF REPORTING PERSON
CO
SCHEDULE 13D
CUSIP No. 293904108
1 NAME OF REPORTING PERSON
Beckton Corp.
2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
(a) / /
(b) / /
3 SEC USE ONLY
4 SOURCE OF FUNDS
OO
| 5 |
CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) or 2(e)/ /
|
6 CITIZENSHIP OR PLACE OF ORGANIZATION
Delaware
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH:
7 SOLE VOTING POWER
0
8 SHARED VOTING POWER
5,279,109
9 SOLE DISPOSITIVE POWER
0
10 SHARED DISPOSITIVE POWER
5,279,109
11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
5,279,109
| 12 |
CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES/ /
|
13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
11.94%
14 TYPE OF REPORTING PERSON
CO
SCHEDULE 13D
CUSIP No. 293904108
1 NAME OF REPORTING PERSON
Carl C. Icahn
2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
(a) / /
(b) / /
3 SEC USE ONLY
4 SOURCE OF FUNDS
OO
| 5 |
CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) or 2(e)/ /
|
6 CITIZENSHIP OR PLACE OF ORGANIZATION
United States of America
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH:
7 SOLE VOTING POWER
0
8 SHARED VOTING POWER
6,598,886
9 SOLE DISPOSITIVE POWER
0
10 SHARED DISPOSITIVE POWER
6,598,886
11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
6,598,886
| 12 |
CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES/ /
|
13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
14.92%
14 TYPE OF REPORTING PERSON
IN
SCHEDULE 13D
Item 1. Security and Issuer
This statement constitutes Amendment No. 9 to the Schedule 13D relating to the shares of Common Stock, par value $0.01 per share (the "Shares"), issued by Enzon Pharmaceuticals, Inc., a Delaware corporation (the "Issuer"), and amends the Schedule 13D relating to the Shares filed on March 14, 2008 and amended by Amendment Nos. 1 through 8 thereto (as amended, the "Original 13D"), on behalf of the Reporting Persons (as defined in the Original 13D). Capitalized terms used herein and not otherwise defined have the respective meanings ascribed thereto in the Original 13D.
Item 3. Source and Amount of Funds or Other Consideration
Item 3 of the Original 13D is hereby amended by replacing it in its entirety with the following:
The Reporting Persons may be deemed to be the beneficial owner of, in the aggregate, 6,598,886 Shares. The aggregate purchase price paid by the Reporting Persons for the Shares was approximately $54.8 million (including commissions and premiums for options to purchase Shares). The source of funding for the Shares held by the Reporting Persons was the general working capital of the respective purchasers. The Shares held by the Reporting Persons are held in margin accounts together with other securities. Such margin accounts may from time to time have debit balances. Part of the purchase price of such Shares was obtained through margin borrowing.
Item 5. Interest in Securities of the Issuer
Items 5(a) and (b) of the Original 13D are hereby amended by replacing them in their entirety with the following:
(a) The Reporting Persons may be deemed to beneficially own, in the aggregate, 6,598,886 Shares, representing approximately 14.92% of the Issuer's outstanding Shares (based upon the 44,214,603 Shares stated to be outstanding as of October 31, 2016 by the Issuer in the Issuer's Form 10-Q for the quarterly period ended September 30, 2016 filed with the Securities and Exchange Commission on November 10, 2016).
(b) High River has sole voting power and sole dispositive power with regard to 1,319,777 Shares. Each of Hopper, Barberry and Mr. Icahn has shared voting power and shared dispositive power with regard to such Shares. Icahn Master has sole voting power and sole dispositive power with regard to 2,147,937 Shares. Each of Icahn Offshore, Icahn Capital, IPH, Icahn Enterprises Holdings, Icahn Enterprises GP, Beckton and Mr. Icahn has shared voting power and shared dispositive power with regard to such Shares. Icahn Partners has sole voting power and sole dispositive power with regard to 3,131,172 Shares. Each of Icahn Onshore, Icahn Capital, IPH, Icahn Enterprises Holdings, Icahn Enterprises GP, Beckton and Mr. Icahn has shared voting power and shared dispositive power with regard to such Shares.
Each of Hopper, Barberry and Mr. Icahn, by virtue of their relationships to High River (as disclosed in Item 2), may be deemed to indirectly beneficially own (as that term is defined in Rule 13d-3 under the Securities Exchange Act of 1934, as amended, the "Act") the Shares which High River directly beneficially owns. Each of Hopper, Barberry and Mr. Icahn disclaims beneficial ownership of such Shares for all other purposes. Each of Icahn Offshore, Icahn Capital, IPH, Icahn Enterprises Holdings, Icahn Enterprises GP, Beckton and Mr. Icahn, by virtue of their relationships to Icahn Master (as disclosed in Item 2), may be deemed to indirectly beneficially own (as that term is defined in Rule 13d-3 under the Act) the Shares which Icahn Master directly beneficially owns. Each of Icahn Offshore, Icahn Capital, IPH, Icahn Enterprises Holdings, Icahn Enterprises GP, Beckton and Mr. Icahn disclaims beneficial ownership of such Shares for all other purposes. Each of Icahn Onshore, Icahn Capital, IPH, Icahn Enterprises Holdings, Icahn Enterprises GP, Beckton and Mr. Icahn, by virtue of their relationships to Icahn Partners (as disclosed in Item 2), may be deemed to indirectly beneficially own (as that term is defined in Rule 13d-3 under the Act) the Shares which Icahn Partners directly beneficially owns. Each of Icahn Onshore, Icahn Capital, IPH, Icahn Enterprises Holdings, Icahn Enterprises GP, Beckton and Mr. Icahn disclaims beneficial ownership of such Shares for all other purposes.
Item 5(c) of the Original 13D is herby amended by the addition of the following:
(c) The following table sets forth all transactions with respect to Shares effected by the Reporting Persons within the last 60 days. Except as otherwise noted below, all such transactions were purchases of Shares effected in the open market, and the table includes commissions paid in per share prices.
|
Name of Reporting Person
|
Date of Transaction
|
Amount of Securities
|
Price Per Share
|
|
High River Limited Partnership
|
11/28/2016
|
138,805
|
$0.4050
|
|
Icahn Partners LP
|
11/28/2016
|
434,594
|
$0.4050
|
|
Icahn Partners Master Fund LP
|
11/28/2016
|
120,624
|
$0.4050
|
Item 6. Contracts, Arrangements, Understandings or Relationship with Respect to Securities of the Issuer
Item 6 of the Original 13D is hereby amended by the addition of the following:
On November 28, 2016, all of the Total Return Swap agreements previously described in this Item 6 settled. As a result, the Reporting Persons no longer have economic exposure to any Shares through such agreements.
SIGNATURE
After reasonable inquiry and to the best of each of the undersigned knowledge and belief, each of the undersigned certifies that the information set forth in this statement is true, complete and correct.
Dated: November 29, 2016
ICAHN PARTNERS MASTER FUND LP
ICAHN OFFSHORE LP
ICAHN PARTNERS LP
ICAHN ONSHORE LP
BECKTON CORP.
HOPPER INVESTMENTS LLC
BARBERRY CORP.
HIGH RIVER LIMITED PARTNERSHIP
By: Hopper Investments LLC, general partner
By: Barberry Corp.
By: /s/ Edward E. Mattner
Name: Edward E. Mattner
Title: Authorized Signatory
ICAHN CAPITAL LP
By: IPH GP LLC, its general partner
By: Icahn Enterprises Holdings L.P., its sole member
By: Icahn Enterprises G.P. Inc., its general partner
IPH GP LLC
By: Icahn Enterprises Holdings L.P., its sole member
By: Icahn Enterprises G.P. Inc., its general partner
ICAHN ENTERPRISES HOLDINGS L.P.
By: Icahn Enterprises G.P. Inc., its general partner
ICAHN ENTERPRISES G.P. INC.
By: /s/ SungHwan Cho
Name: SungHwan Cho
Title: Chief Financial Officer
/s/ Carl C. Icahn
CARL C. ICAHN
[Signature Page of Amendment No. 9 to Schedule 13D – Enzon Pharmaceuticals, Inc.]