{"schema_version":"secwatch.filing_event.v1","accession":"0001104659-23-010898","form_type":"8-K","ticker":"MASI","cik":"0000937556","company_name":"MASIMO CORP","filed_at":"2023-02-06T23:59:59+00:00","discovered_at":"2026-05-14T18:03:48.657175+00:00","generated_at":"2026-06-20T00:45:00.862520+00:00","sec_items":["5.03","9.01"],"event_type":"other","sentiment":"neutral","materiality_score":0.25,"calibrated_materiality_score":0.25,"confidence":"high","headline":"Masimo amends bylaws, sets 2023 stockholder proposal window March 24–April 24","bullets":["Board adopted Fifth Amended and Restated Bylaws on Feb. 5, 2023, reverting to Oct. 2019 version.","Advance notice submissions for 2023 annual meeting open March 24 and close April 24, 2023, at 6:00 p.m. ET.","Change applies only to stockholder nominations and proposals; other bylaw provisions return to prior state."],"urls":{"canonical":"https://secwatch.observer/filing/0001104659-23-010898","json":"https://secwatch.observer/filing/0001104659-23-010898.json","markdown":"https://secwatch.observer/filing/0001104659-23-010898.md","text":"https://secwatch.observer/filing/0001104659-23-010898.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/937556/000110465923010898/0001104659-23-010898-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/937556/000110465923010898/tm235562d1_8k.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-20T00:45:00.862520+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":"453ccd4c09ba4bce2ed949bd98ba355302e446d1","claim":"MASIMO CORP: Board approved amended and restated bylaws reverting to Second Amended and Restated Bylaws dated October 24, 2019, but with a specific notice period for the 2023 annual meeting of stockholders (March 24, 2023 to April 24, 2023) (effective 2023-02-05).","evidence_excerpt":"On February 5, 2023, the Board of Directors (the “Board”) of Masimo Corporation, a Delaware corporation (the “Corporation”) approved and adopted amended and restated bylaws (the “Amended and Restated Bylaws”) which revert to the Second Amended and Restated Bylaws of the Corporation, dated as of October 24, 2019 (included as Exhibit 3.1 to the Current Report on Form 8-K, filed by the Corporation with the U.S. Securities and Exchange Commission on October 30, 2019), except that the Amended and Restated Bylaws continue to provide that the period for stockholders to give notice of their intention to nominate directors to stand for election and to submit stockholder proposals for consideration at the 2023 annual meeting of stockholders will begin on March 24, 2023 and will remain open for one month, closing at 6:00 p.m. local time in Wilmington, Delaware on April 24, 2023.","evidence_source":"SEC 8-K Item 5.03/5.05/5.06","evidence_url":"https://www.sec.gov/Archives/edgar/data/937556/000110465923010898/0001104659-23-010898-index.htm","confidence":0.9,"family_label":"Governance Changes","details":[{"label":"Change","value":"bylaw amendment"},{"label":"Effective","value":"2023-02-05"}],"fact_type":"governance_change"}],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}