8-K filed March 26, 2026, 7:59 PM ET ticker ENZN CIK 0000727510

M&A confidence high sentiment neutral materiality 0.90

Enzon completes all-stock merger with Viskase; combined company renamed Viskase Holdings

Viskase Holdings, Inc.

Enzon shareholders own ~45%, Viskase shareholders ~55% of combined company.
Thomas D. Davis appointed CEO; Richard Feinstein resigned as CEO/CFO/Secretary.
Board expanded to seven members; Robert Flint named Chair; new directors appointed.
Company renamed Viskase Holdings, Inc.; common stock trades as ENZND for 20 days.
Series C Preferred exchanged for 5,658,396 common shares; Series A-1 Preferred eliminated.

item 2.01 item 3.02 item 5.01 item 5.02 item 5.03 item 7.01 item 9.01

Machine-readable event card

schema_version: secwatch.filing_event.v1
accession: 0001104659-26-035301
form_type: 8-K
ticker: ENZN
cik: 0000727510
company_name: Viskase Holdings, Inc.
filed_at: 2026-03-26T23:59:59+00:00
discovered_at: 2026-05-14T18:02:37.597553+00:00
generated_at: 2026-05-15T08:55:57.944419+00:00
sec_items: ["2.01", "3.02", "5.01", "5.02", "5.03", "7.01", "9.01"]
event_type: m_and_a
sentiment: neutral
materiality_score: 0.9
calibrated_materiality_score: 0.9
confidence: high
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Source-grounded claims

3cb1c48e9a3a645cf0c3395cba6c799dc2c48893

Viskase Holdings, Inc.: Eliminated Certificate of Designation for Series A-1 Junior Participating Preferred Stock via Certificate of Elimination.

the Company filed a Certificate of Elimination (the “ Certificate of Elimination ”) to its Certificate of Incorporation with the Secretary of State of the State of Delaware eliminating from the Certificate of Incorporation all matters set forth in the Certificate of Designation with respect to the Company’s Series A-1 Junior Participating Preferred Stock

SEC 8-K Item 5.03/5.05/5.06 confidence 1.0 SEC evidence

debba8c22fd72176d92f147951e27a548353ff37

Viskase Holdings, Inc.: Changed company name to Viskase Holdings, Inc. via Certificate of Amendment to Amended Certificate of Incorporation.

the Company filed a Certificate of Amendment (the “ Certificate of Amendment ”) to its Amended Certificate of Incorporation (the “ Certificate of Incorporation ”) with the Secretary of State of the State of Delaware to change its name to “Viskase Holdings, Inc.”

SEC 8-K Item 5.03/5.05/5.06 confidence 1.0 SEC evidence

0d0110ef8e2faf4befd923764b697365493577f1

Viskase Holdings, Inc. completed an acquisition involving Viskase Companies, Inc. for all-stock transaction (closed 2026-03-26).

On March 26, 2026 (the " Closing Date "), Viskase Holdings, Inc. (formerly known as Enzon Pharmaceuticals, Inc.) (the " Company " or the " Combined Company ") consummated the previously announced transactions pursuant to the Agreement and Plan of Merger, dated as of June 20, 2025, by and among the Company, EPSC Acquisition Corp. (" Merger Sub "), and Viskase Companies, Inc. (" Viskase "), as amended by the First Amendment to the Agreement and Plan of Merger, dated as of October 24, 2025 (as amended, the " Merger Agreement ").

SEC 8-K Item 2.01/5.01 confidence 0.9 SEC evidence

d15be21534c7768fc9ffe1f0b45db73fe66d95e4

Viskase Holdings, Inc. underwent a change of control involving Viskase Companies, Inc. for all-stock transaction (closed 2026-03-26).

On March 26, 2026 (the " Closing Date "), Viskase Holdings, Inc. (formerly known as Enzon Pharmaceuticals, Inc.) (the " Company " or the " Combined Company ") consummated the previously announced transactions pursuant to the Agreement and Plan of Merger, dated as of June 20, 2025, by and among the Company, EPSC Acquisition Corp. (" Merger Sub "), and Viskase Companies, Inc. (" Viskase "), as amended by the First Amendment to the Agreement and Plan of Merger, dated as of October 24, 2025 (as amended, the " Merger Agreement ").

SEC 8-K Item 2.01/5.01 confidence 0.9 SEC evidence

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same fact type: governance_change, ma_transaction same SEC item: 2.01, 3.02, 5.01, 5.02, 5.03, 7.01, 9.01 same event type: m_and_a similar materiality

This filing

the Company filed a Certificate of Elimination (the “ Certificate of Elimination ”) to its Certificate of Incorporation with the Secretary of State of the State of Delaware eliminating from the Certificate of Incorporation all matters set forth in the Certificate of Designation with respect to the Company’s Series A-1 Junior Participating Preferred Stock

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same fact type: governance_change, ma_transaction same SEC item: 2.01, 5.01, 5.02, 5.03, 7.01, 9.01 same event type: m_and_a similar materiality

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the Company filed a Certificate of Elimination (the “ Certificate of Elimination ”) to its Certificate of Incorporation with the Secretary of State of the State of Delaware eliminating from the Certificate of Incorporation all matters set forth in the Certificate of Designation with respect to the Company’s Series A-1 Junior Participating Preferred Stock

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the Certificate of Incorporation of the Company that was in effect immediately before the Effective Time was amended and restated to be in the form attached hereto as Exhibit 3.1

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EKSO BIONICS HOLDINGS, INC. May 5, 2026, 7:59 PM ET m_and_a Items 1.01, 2.01, 2.02, 3.02, 3.03, 4.01, 5.01, 5.02, 5.03, 9.01

same fact type: governance_change, ma_transaction same SEC item: 2.01, 3.02, 5.01, 5.02, 5.03, 9.01 same event type: m_and_a similar materiality

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the Company filed a Certificate of Elimination (the “ Certificate of Elimination ”) to its Certificate of Incorporation with the Secretary of State of the State of Delaware eliminating from the Certificate of Incorporation all matters set forth in the Certificate of Designation with respect to the Company’s Series A-1 Junior Participating Preferred Stock

Comparable filing

on May 1, 2026, the Company filed the Second Amended and Restated Articles of Incorporation (the “A&R Articles”) with the Secretary of State of the State of Nevada with a delayed effective date and time of 3:00 a.m. (Eastern Time) on May 5, 2026.

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same fact type: governance_change, ma_transaction same SEC item: 2.01, 3.02, 5.01, 5.02, 5.03, 9.01 same event type: m_and_a similar materiality

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the Company filed a Certificate of Elimination (the “ Certificate of Elimination ”) to its Certificate of Incorporation with the Secretary of State of the State of Delaware eliminating from the Certificate of Incorporation all matters set forth in the Certificate of Designation with respect to the Company’s Series A-1 Junior Participating Preferred Stock

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Effective upon completion of the Merger, the bylaws of the Company, as in effect immediately prior to the Effective Time, were amended and restated to be in the form of the bylaws filed herewith as Exhibit 3.2.

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same fact type: governance_change, ma_transaction same SEC item: 2.01, 3.02, 5.02, 5.03, 7.01, 9.01 same event type: m_and_a similar materiality

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the Company filed a Certificate of Elimination (the “ Certificate of Elimination ”) to its Certificate of Incorporation with the Secretary of State of the State of Delaware eliminating from the Certificate of Incorporation all matters set forth in the Certificate of Designation with respect to the Company’s Series A-1 Junior Participating Preferred Stock

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The Company has filed with the Secretary of State of the State of Delaware a Certificate of Designation of Preferences, Rights and Limitations of the Company Preferred Stock (the “Certificate of Designation”) in connection with the Merger referenced in Item 1.01 above.

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same fact type: ma_transaction same SEC item: 2.01, 3.02, 5.02, 5.03, 7.01, 9.01 same event type: m_and_a similar materiality

This filing

On March 26, 2026 (the " Closing Date "), Viskase Holdings, Inc. (formerly known as Enzon Pharmaceuticals, Inc.) (the " Company " or the " Combined Company ") consummated the previously announced transactions pursuant to the Agreement and Plan of Merger, dated as of June 20, 2025, by and among the Company, EPSC Acquisition Corp. (" Merger Sub "), and Viskase Companies, Inc. (" Viskase "), as amended by the First Amendment to the Agreement and Plan of Merger, dated as of October 24, 2025 (as amended, the " Merger Agreement ").

Comparable filing

of Flushing (“ Flushing Common Stock ”) issued and outstanding immediately prior to the Effective Time, subject to certain exceptions, was converted into the right to receive 0.85 of a share (the “ Exchange Ratio ”) of common stock, par value $0.01 per share, of OceanFirst (“ OceanFirst Common Stock ” and such consideration, the “ Merger Consideration ”).

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same fact type: governance_change, ma_transaction same SEC item: 5.01, 5.02, 5.03, 7.01, 9.01 same event type: m_and_a similar materiality

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the Company filed a Certificate of Elimination (the “ Certificate of Elimination ”) to its Certificate of Incorporation with the Secretary of State of the State of Delaware eliminating from the Certificate of Incorporation all matters set forth in the Certificate of Designation with respect to the Company’s Series A-1 Junior Participating Preferred Stock

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same fact type: governance_change, ma_transaction same SEC item: 2.01, 5.02, 5.03, 7.01, 9.01 same event type: m_and_a similar materiality

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the Company filed a Certificate of Elimination (the “ Certificate of Elimination ”) to its Certificate of Incorporation with the Secretary of State of the State of Delaware eliminating from the Certificate of Incorporation all matters set forth in the Certificate of Designation with respect to the Company’s Series A-1 Junior Participating Preferred Stock

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Filing page SEC filing

Source: SEC EDGAR

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