Key facts
- This page summarizes Carl C. Icahn's Form 4 filing for Viskase Holdings, Inc. (ENZN).
- 3 reported transactions and 0 derivative rows are listed below.
- Accepted by SEC: 27 Mar 2026, 19:50.
Carl C. Icahn - 25 Mar 2026 Form 4 Insider Report for Viskase Holdings, Inc. (ENZN)
- Reporting relationship
- 10%+ Owner
- Issuer ticker
- ENZN
- Reported as of
- 25 Mar 2026
- Net transaction value
- $0
- SEC form
- 4
- Accepted by SEC
- 27 Mar 2026, 19:50:39 UTC
- Prior SEC filing
- 24 Feb 2026
- Next SEC filing
- 17 Apr 2026
- Source filing
- View source filing
- Reporting owner signature
- /s/ Carl C. Icahn
Source evidence
Original filing metadata and source links for verification.
5 source fields
Reporting owner
1 detail
Key filing fact
Carl C. Icahn filed Form 4 for Viskase Holdings, Inc. (ENZN) on 27 Mar 2026.
Change
- Previous filing in this sequence was filed on 24 Feb 2026.
- Current net transaction value: $0.
Research use
- This tells you what this filing adds before you inspect full transaction and derivative tables.
- You can trace every row back to the original SEC filing document.
Evidence
Filed on Form 4
View source filing
Ownership activity is grounded in SEC Form 4 disclosures.
Reporting Owners (3)
CIK 0000921669
Primary reporting owner
ICAHN CARL C
- Relationship
- 10%+ Owner
- Address
- C/O ICAHN ASSOCIATES HOLDING LLC, 16690 COLLINS AVENUE, PH-1, SUNNY ISLES BEACH
- Signature
- /s/ Carl C. Icahn
- Signature date
- 27 Mar 2026
CIK 0001034563
ICAHN ENTERPRISES HOLDINGS L.P.
- Relationship
- 10%+ Owner
- Address
- 16690 COLLINS AVENUE, PH-1, SUNNY ISLES BEACH
- Signature
- /s/ Ted Papapostolou, for Icahn Enterprises Holdings L.P., By: Ted Papapostolou, its Chief Financial Officer and Secretary
- Signature date
- 27 Mar 2026
CIK 0001257324
ICAHN ENTERPRISES G.P. INC.
- Relationship
- 10%+ Owner
- Address
- 16690 COLLINS AVENUE, SUITE PH-1, SUNNY ISLES BEACH
- Signature
- /s/ Ted Papapostolou, for Icahn Enterprises G.P. Inc., By: Ted Papapostolou, its Chief Financial Officer and Secretary
- Signature date
- 27 Mar 2026
Reported non-derivative transactions
Shares, units, or other non-derivative securities reported in this filing.
ENZN
transaction
Preferred Stock
Disposed to Issuer
- Transaction value
- Shares
- -39,277
- Change %
- -100%
- Price
- Shares after
- 0
- Date
- 25 Mar 2026
- Ownership
- Please see footnotes
- Footnotes
- F1, F4, F5, F6
ENZN
transaction
Preferred Stock
Disposed to Issuer
- Transaction value
- Shares
- -39,277
- Change %
- -100%
- Price
- Shares after
- 0
- Date
- 25 Mar 2026
- Ownership
- Please see footnotes
- Footnotes
- F1, F4, F5, F6
ENZN
transaction
Preferred Stock
Disposed to Issuer
- Transaction value
- Shares
- -39,277
- Change %
- -100%
- Price
- Shares after
- 0
- Date
- 25 Mar 2026
- Ownership
- Please see footnotes
- Footnotes
- F1, F4, F5, F6
ENZN
transaction
Common Stock
Award
- Transaction value
- Shares
- +5,658,396
- Change %
- +1569%
- Price
- Shares after
- 6,018,962
- Date
- 25 Mar 2026
- Ownership
- Please see footnotes
- Footnotes
- F1, F2, F4, F5, F6
ENZN
transaction
Common Stock
Award
- Transaction value
- Shares
- +5,658,396
- Change %
- +1569%
- Price
- Shares after
- 6,018,962
- Date
- 25 Mar 2026
- Ownership
- Please see footnotes
- Footnotes
- F1, F2, F4, F5, F6
ENZN
transaction
Common Stock
Award
- Transaction value
- Shares
- +5,658,396
- Change %
- +1569%
- Price
- Shares after
- 6,018,962
- Date
- 25 Mar 2026
- Ownership
- Please see footnotes
- Footnotes
- F1, F2, F4, F5, F6
ENZN
transaction
Common Stock
Award
- Transaction value
- Shares
- +7,407,489
- Change %
- +123%
- Price
- Shares after
- 13,426,451
- Date
- 26 Mar 2026
- Ownership
- Please see footnotes
- Footnotes
- F3, F4, F5, F6
ENZN
transaction
Common Stock
Award
- Transaction value
- Shares
- +7,407,489
- Change %
- +123%
- Price
- Shares after
- 13,426,451
- Date
- 26 Mar 2026
- Ownership
- Please see footnotes
- Footnotes
- F3, F4, F5, F6
ENZN
transaction
Common Stock
Award
- Transaction value
- Shares
- +7,407,489
- Change %
- +123%
- Price
- Shares after
- 13,426,451
- Date
- 26 Mar 2026
- Ownership
- Please see footnotes
- Footnotes
- F3, F4, F5, F6
* marks a reported price that did not pass the local price check.
Additional SEC filing notes
Filing notes and footnotes
Explanation of responses 6 footnotes
Footnote F1
Disposed of in exchange for 5,658,396 shares of common stock of the Issuer in connection with the merger of the Issuer and Viskase Companies, Inc. (the "Merger"). Following the closing of the Merger on March 26, 2026, the combined company was renamed "Viskase Holdings, Inc."
Footnote F2
Reflects the Issuer's 1-for-100 reverse stock split effected on March 25, 2026.
Footnote F3
Received in exchange for 150,810,078 shares of Viskase Companies, Inc. in connection with the Merger.
Footnote F4
This Form 4 is being filed by, and on behalf of, Mr. Carl C. Icahn, Icahn Enterprises Holdings L.P. ("Icahn Enterprises Holdings") and Icahn Enterprises G.P. Inc. ("Icahn Enterprises GP" and, collectively with Mr. Icahn and Icahn Enterprises Holdings, the "Reporting Persons"). Shares held directly by American Entertainment Properties Corp ("AEP").
Footnote F5
AEPC Holdings LLC owns 100% of the equity of AEP. Icahn Enterprises Holdings owns a 100% interest in AEPC Holdings LLC. Icahn Enterprises L.P. owns a 99% limited partner interest in Icahn Enterprises Holdings. Carl C. Icahn is the indirect holder of approximately 87% of the issued and outstanding depositary units representing limited partnership interests in Icahn Enterprises L.P. Icahn Enterprises GP is the general partner of and owns a 1% general partner interest in each of Icahn Enterprises Holdings and Icahn Enterprises L.P. Icahn Enterprises GP is 100% owned by Beckton Corp ("Beckton"). Beckton is 100% owned by Mr. Icahn.
Footnote F6
Each of AEP, Icahn Enterprises Holdings, Icahn Enterprises GP, Beckton and Mr. Icahn disclaims beneficial ownership of the Issuer's shares of common stock except to the extent of his or its pecuniary interest therein, if any.