{"schema_version":"secwatch.filing_event.v1","accession":"0001140361-26-033377","form_type":"8-K","ticker":null,"cik":"0000931182","company_name":"ERP OPERATING LTD PARTNERSHIP","filed_at":"2026-08-17T20:01:49+00:00","discovered_at":"2026-08-17T20:03:00.375790+00:00","generated_at":"2026-08-17T20:03:38.653587+00:00","sec_items":["2.01","3.03","5.03","5.02","7.01","9.01","1.01"],"event_type":"m_and_a","sentiment":"neutral","materiality_score":1.0,"calibrated_materiality_score":1.0,"confidence":"high","headline":"Equity Residential closes AvalonBay merger, renames to Vivmark Residential, ticker VMRK","bullets":["Merger closed Aug 17, 2026; AvalonBay shareholders receive 2.793 Vivmark shares per share; ~400M shares issued.","Company renamed Vivmark Residential; ticker changes to VMRK on NYSE effective Aug 18, 2026.","Board expanded to 14 trustees, 7 from each legacy board; Stephen E. Sterrett named Chairman.","Benjamin W. Schall (ex-AvalonBay CEO) becomes President & CEO; CFO Kevin P. O'Shea, COO Sean J. Breslin, CDO Matthew H. Birenbaum from AvalonBay.","AvalonBay audited and unaudited financial statements and pro forma financials included as exhibits."],"urls":{"canonical":"https://secwatch.observer/filing/0001140361-26-033377","json":"https://secwatch.observer/filing/0001140361-26-033377.json","markdown":"https://secwatch.observer/filing/0001140361-26-033377.md","text":"https://secwatch.observer/filing/0001140361-26-033377.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/931182/000114036126033377/0001140361-26-033377-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/906107/000114036126033377/ef20080318_8k.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-08-17T20:03:38.653587+00:00"},"review":{"review_status":"machine_generated","human_reviewed":false,"corrected":false,"correction_note":null,"correction_timestamp":null,"superseded_by":null,"related_filings":[]},"source_grounded_claims":[{"claim_id":"1dd40e7c15","claim":"Mark J. Parrell resigned as Trustee at ERP OPERATING LTD PARTNERSHIP.","evidence_excerpt":"prior to the Effective Time, each of Tahsinul Zia Huque, Mark J. Parrell and Mark S. Shapiro tendered resignations to the Board, effective as of immediately prior to the Effective Time.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/931182/000114036126033377/0001140361-26-033377-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"resigned"},{"label":"Role","value":"Trustee"}],"fact_type":"executive_change"},{"claim_id":"479afa15e1","claim":"Stephen E. 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Schall and Susan Swanezy (collectively, the “New Trustees”) were directors of the AvalonBay board of directors prior to the Effective Time and were appointed to the Board, effective as of the Effective Time.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/931182/000114036126033377/0001140361-26-033377-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"appointed"},{"label":"Role","value":"Trustee"}],"fact_type":"executive_change"},{"claim_id":"57e64a3c47","claim":"Susan Swanezy was appointed as Trustee at ERP OPERATING LTD PARTNERSHIP.","evidence_excerpt":"Each of Terry S. Brown, Conor C. Flynn, Christopher B. Howard, Charles E. Mueller, Jr., Timothy J. Naughton, Benjamin W. Schall and Susan Swanezy (collectively, the “New Trustees”) were directors of the AvalonBay board of directors prior to the Effective Time and were appointed to the Board, effective as of the Effective Time.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/931182/000114036126033377/0001140361-26-033377-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"appointed"},{"label":"Role","value":"Trustee"}],"fact_type":"executive_change"},{"claim_id":"79c6cf0507","claim":"Tahsinul Zia Huque resigned as Trustee at ERP OPERATING LTD PARTNERSHIP.","evidence_excerpt":"prior to the Effective Time, each of Tahsinul Zia Huque, Mark J. Parrell and Mark S. 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Shapiro tendered resignations to the Board, effective as of immediately prior to the Effective Time.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/931182/000114036126033377/0001140361-26-033377-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"resigned"},{"label":"Role","value":"Trustee"}],"fact_type":"executive_change"},{"claim_id":"97a39e5caa","claim":"Charles E. Mueller, Jr. was appointed as Trustee at ERP OPERATING LTD PARTNERSHIP.","evidence_excerpt":"Each of Terry S. Brown, Conor C. Flynn, Christopher B. Howard, Charles E. Mueller, Jr., Timothy J. Naughton, Benjamin W. 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Schall and Susan Swanezy (collectively, the “New Trustees”) were directors of the AvalonBay board of directors prior to the Effective Time and were appointed to the Board, effective as of the Effective Time.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/931182/000114036126033377/0001140361-26-033377-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"appointed"},{"label":"Role","value":"Trustee"}],"fact_type":"executive_change"}],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}