Enzon Pharmaceuticals extends poison pill expiration to Jan 31, 2026

Viskase Holdings, Inc.

Sixth Amendment extends Section 382 Rights Agreement Final Expiration Date from Dec 31, 2025 to Jan 31, 2026.
Rights plan terms otherwise unchanged; adopted to preserve tax attributes under Section 382.
This is the sixth extension of the original August 2020 rights agreement; prior amendments extended expiration sequentially.
The amendment was entered into on Dec 23, 2025 between Enzon and Continental Stock Transfer & Trust Company.

Key facts

Extracted from this filing and checked against the source text.

Material Agreements SEC 8-K Item 1.01/1.02 confidence 0.9

Viskase Holdings, Inc. entered into Sixth Amendment with Continental Stock Transfer & Trust Company (effective 2025-12-23).

Action: entry
Counterparty: Continental Stock Transfer & Trust Company
Effective: 2025-12-23

Exact text from the filing

On December 23, 2025, Enzon Pharmaceuticals, Inc. (the “ Company ”) entered into the Sixth Amendment to the Section 382 Rights Agreement (the “ Sixth Amendment ”), which amends the Section 382 Rights Agreement, dated as of August 14, 2020 (the “ Rights Agreement ”), by and between the Company and Continental Stock Transfer & Trust Company, as rights agent.

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Viskase Holdings, Inc. filing history →

Source: SEC EDGAR

accession 0001104659-25-124254

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