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{"aggregator_url":"https://www.sec.gov {"aggregator_url":"https://www.sec.gov/Archives/edgar/data/2036042/0000947871-26-000458.txt","as_of":"2026-04-22T03:03:32.063787+00:00","canonical_url":"https://www.sec.gov/Archives/edgar/data/2036042/0000947871-26-000458.txt","company":"Sionna Therapeutics, Inc.","enrichment":{"aggregator_url":"https://www.sec.gov/Archives/edgar/data/2036042/0000947871-26-000458.txt","article_chars":3698,"article_truncated":false,"blocked_reason":null,"candidate_id":"sc_3fe08b08d079758f","canonical_host":"sec.gov","canonical_is_aggregator":false,"canonical_url":"https://www.sec.gov/Archives/edgar/data/2036042/0000947871-26-000458.txt","content_type":"text/plain","enriched_at":"2026-04-22T03:29:17.283769+00:00","extraction_method":"trafilatura","fetched_description":"","fetched_title":"","final_url":"https://www.sec.gov/Archives/edgar/data/2036042/0000947871-26-000458.txt","html_truncated":false,"paywall_likely":false,"publisher_domain":"sec.gov","publisher_resolution":"canonical_url","requested_url":"https://www.sec.gov/Archives/edgar/data/2036042/0000947871-26-000458.txt","source_event_id":"evt_52df221f4600","source_quality":"high","status_code":200,"version":"signal_enrichment_v2"},"form_type":"4","fp":"a0e1a3f592970802","kind":"sec_filing","published_at":"20260421","publisher_domain":"sec.gov","signal_understanding":{"analysis_basis":"article","claim_confidence":0.78,"dates_mentioned":["2026-04-17","2026-04-18","2026-04-21","2026-04-22T03:03:32.063787+00:00"],"entities":[{"asset_class":"equity","name":"Sionna Therapeutics, Inc.","relevance":"high","symbol":"SION","type":"issuer"},{"asset_class":"equity","name":"OrbiMed Advisors LLC","relevance":"high","symbol":"","type":"reporting_owner"},{"asset_class":"equity","name":"OrbiMed Capital GP VIII LLC","relevance":"high","symbol":"","type":"reporting_owner"},{"asset_class":"equity","name":"OrbiMed Private Investments VIII, LP (OPI VIII)","relevance":"medium","symbol":"","type":"entity_relationship"},{"asset_class":"equity","name":"Carl L. Gordon","relevance":"medium","symbol":"","type":"individual"},{"asset_class":"equity","name":"Sven H. Borho","relevance":"medium","symbol":"","type":"individual"},{"asset_class":"equity","name":"W. Carter Neild","relevance":"medium","symbol":"","type":"individual"},{"asset_class":"equity","name":"Peter A. Thompson","relevance":"low","symbol":"","type":"individual"}],"event_type":"listing","information_gaps":["The provided text does not explicitly label the transaction type (e.g., sale vs purchase) beyond the statement that \u201cThese securities were sold pursuant to a 10b5-1 plan,\u201d and it does not clearly map each numeric line to a specific transaction type (e.g., sale vs other) beyond the generic \u201csold\u201d statement.","The \u201cSION filed 4\u201d headline is not fully corroborated in the extracted text beyond the issuer name and the presence of Form 4; the exact headline text content is not included in the article text.","No explicit \u201cchange vs prior known state\u201d is provided in the supplied text (no prior Form 4 baseline or comparison data is included)."],"key_facts":["SEC accession document shows CONFORMED SUBMISSION TYPE: 4 and CONFORMED PERIOD OF REPORT: 20260417, FILED AS OF DATE: 20260421.","Reporting persons include OrbiMed Advisors LLC and OrbiMed Capital GP VIII LLC, both listed as Form 4 reporting owners for issuer Sionna Therapeutics, Inc. (SION).","The filing states: \u201cThese securities were sold pursuant to a 10b5-1 plan.\u201d","The filing states the securities are held of record by OrbiMed Private Investments VIII, LP (\u201cOPI VIII\u201d).","The filing states OrbiMed Capital GP VIII LLC is the general partner of OPI VIII and OrbiMed Advisors LLC is the managing member of GP VIII, and that they may be deemed to have voting and investment power with respect to shares held by OPI VIII.","The filing states that Carl L. Gordon, Sven H. Borho, and W. Carter Neild exercise investment and voting power through a management committee and each disclaims beneficial ownership of the shares held by OPI VIII.","The filing states it is jointly filed by OrbiMed Advisors and GP VIII and includes signatures dated 2026-04-21 by Carl L. Gordon (Member of OrbiMed Advisors LLC and Member of OrbiMed Capital GP VIII LLC).","The filing includes a statement that a representative (Peter A. Thompson) has been designated to serve on the issuer\u2019s board of directors."],"numeric_claims":[{"label":"Conformed period of report","value":"20260417"},{"label":"Filed as of date","value":"20260421"},{"label":"Issuer fiscal year end","value":"1231"},{"label":"Common stock transaction date shown (first line)","value":"2026-04-17"},{"label":"Common stock transaction date shown (second line)","value":"2026-04-18"},{"label":"Common stock quantity shown (first line)","value":"52397"},{"label":"Common stock price shown (first line)","value":"44.68"},{"label":"Common stock quantity shown (second line)","value":"2948"},{"label":"Common stock price shown (second line)","value":"44.52"}],"primary_claim":"Form 4 for Sionna Therapeutics, Inc. was filed on 2026-04-21 (covering period of report 2026-04-17) reporting common stock transactions by OrbiMed Advisors LLC and OrbiMed Capital GP VIII LLC under a 10b5-1 plan.","relevance_score":0.62,"sentiment":"neutral","source_quality":"high","summary":"Sionna Therapeutics, Inc. (SION) reported a Form 4 filed on 2026-04-21 covering common stock transactions by OrbiMed-related reporting persons under a 10b5-1 plan. The filing indicates the shares are held through OrbiMed Private Investments VIII, LP and that OrbiMed Advisors/GP VIII may be deemed to have beneficial ownership, with certain individuals disclaiming beneficial ownership.","topics":["SEC Form 4","insider/beneficial ownership","10b5-1 plan","OrbiMed","common stock transactions"]},"source":"sec_edgar","source_domain":"sec.gov","summary":"Form 4 \u00b7 Sionna Therapeutics, Inc. \u00b7 Filed 20260421","ticker":"SION","tickers":["SION"],"title":"SION filed 4","url":"https://www.sec.gov/Archives/edgar/data/2036042/0000947871-26-000458.txt"}... |