Comparable stake leader
Carl C. Icahn
SEC ownership of Viskase Holdings, Inc.
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0000727510.
Disclosed value leader
Jonathan Couchman
Comparable rows
5/7
Latest evidence
26 Mar 2026
- Public ticker
- ENZN on OTC
- Parsed ownership sources
-
3/4/5 and 13D/G
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
- Largest SEC-reported holder
-
Carl C. Icahn
Ranking: Comparable ownership first, then disclosed value
- Comparable ownership rows
-
5 of 7
Meaning: Rows with safely comparable ownership %
- Latest 13D/G holder
-
Carl C. Icahn
Source: Latest parsed Schedule 13D/G stake
- Latest parsed ownership date
-
26 Mar 2026
Freshness: Most recent filing date in this holder set
- Issuer CIK
- 0000727510
- Issuer location
- Lombard, IL
Ownership snapshot
CIK-linked ownership evidence from parsed SEC filings.
3 signals
Issuer
Names, identifiers, and filing context for this profile.
2 identity fields
Ownership snapshot
Top shareholders of Viskase Holdings, Inc. (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
Carl C. Icahn
Disclosed value leader
Jonathan Couchman
Comparable rows
5/7
Latest evidence
26 Mar 2026
3/4/5
13D/G
Lead comparable stake: 94%
2 rows are not safely comparable across share classes.
13D/G row: Carl C. Icahn
Quick read
Carl C. Icahn leads the comparable SEC ownership view at 94%.
5 of 7 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens Carl C. Icahn's linked filing trail.
Comparable ownership
Top 5
Carl C. Icahn
94%
ICAHN ENTERPRISES G.P. INC.
94%
ICAHN ENTERPRISES HOLDINGS L.P.
94%
Thomas Dale Davis
0.12%
Michael Blecic
0%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-7 of 7 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| Carl C. Icahn |
3/4/5
13D/G
10%+ Owner
|
94%
from 13D/G
|
$939,852
13,426,451 shares
|
— | 25 Mar 2026 |
| ICAHN ENTERPRISES G.P. INC. |
3/4/5
10%+ Owner
|
94%
|
$939,852
13,426,451 shares
|
— | 25 Mar 2026 |
| ICAHN ENTERPRISES HOLDINGS L.P. |
3/4/5
10%+ Owner
|
94%
|
$939,852
13,426,451 shares
|
— | 25 Mar 2026 |
| Thomas Dale Davis |
3/4/5
President, Chief Executive Officer. Exhibit 24.1 - Power of Attorney
|
0.12%
|
$1,167
16,678 shares
|
— | 26 Mar 2026 |
| Michael Blecic |
3/4/5
Vice President, Chief Accounting Officer and Treasurer. Exhibit 24.1 - Power of Attorney
|
0%
|
$7
98 shares
|
— | 26 Mar 2026 |
| Jonathan Couchman |
3/4/5
10%+ Owner
|
—
class O/S missing
|
$1,091,897
7,743,954 shares
|
— | 13 Aug 2021 |
| Randolph C. Read |
3/4/5
Director
|
—
class O/S missing
|
$28,200
200,000 shares
|
— | 14 Jun 2023 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
Forms 3/4/5 flow
Insider trading overview
Insider buy and sell flow is broadly balanced over the last 12 months. No Buy or Sell transactions have been reported since 13 Aug 2025.
Buys
$0
Insiders: 0
Sells
$0
Insiders: 0
Net
$0
Shares: 0
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 0
Shares: 0
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 0 | 0 | $0 | $0 | $0 |
| 3-6 | 0 | 0 | $0 | $0 | $0 |
| 6-9 | 0 | 0 | $0 | $0 | $0 |
| 9-12 | 0 | 0 | $0 | $0 | $0 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-20 of 21 reporting-owner rows connected to Viskase Holdings, Inc.. Open a relationship link for the CIK-to-CIK filing trail.
Rows
21
Largest Forms 3/4/5 holder
Jonathan Couchman
Net 12M change
$0
Latest report
30 Apr 2026
Recent insider transactions for Viskase Holdings, Inc.
Showing up to 300 recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | SEC-reported value | SEC-reported price | Shares | Shares owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| Icahn Carl C | ENZN | Common Stock | Award | 123.1% | 7,407,489 | 13,426,451 | 26 Mar 2026 | Please see footnotes | ||
| Icahn Carl C | ENZN | Common Stock | Award | 123.1% | 7,407,489 | 13,426,451 | 26 Mar 2026 | Please see footnotes | ||
| Carl C. Icahn | ENZN | Common Stock | Award | 123.1% | 7,407,489 | 13,426,451 | 26 Mar 2026 | Please see footnotes | ||
| Icahn Carl C | ENZN | Common Stock | Award | 1569.3% | 5,658,396 | 6,018,962 | 25 Mar 2026 | Please see footnotes | ||
| Icahn Carl C | ENZN | Common Stock | Award | 1569.3% | 5,658,396 | 6,018,962 | 25 Mar 2026 | Please see footnotes | ||
| Carl C. Icahn | ENZN | Common Stock | Award | 1569.3% | 5,658,396 | 6,018,962 | 25 Mar 2026 | Please see footnotes | ||
| Icahn Carl C | ENZN | Preferred Stock | Disposed to Issuer | -100% | -39,277 | 0 | 25 Mar 2026 | Please see footnotes | ||
| Icahn Carl C | ENZN | Preferred Stock | Disposed to Issuer | -100% | -39,277 | 0 | 25 Mar 2026 | Please see footnotes | ||
| Carl C. Icahn | ENZN | Preferred Stock | Disposed to Issuer | -100% | -39,277 | 0 | 25 Mar 2026 | Please see footnotes |
* marks a reported price that did not pass the local price check.