{"entity":{"type":"insider","cik":"0001828865","url":"/insider/0001828865","json_url":"/insider/0001828865.json","name":"Lury Richard R.","name_source":"as-filed","also_issuer":false,"cross_url":null},"coverage_statement":{"n_transactions":9,"n_filings":9,"first":"2021-02-11","last":"2025-08-13","span_basis":"filed_date"},"name_variants":[{"name":"Lury Richard R.","source":"filing","n_filings":9,"first_seen":"2021-02-11","last_seen":"2025-08-13"}],"transactions":[{"id":4103240,"accession":"0001828865-25-000005","txn_seq":1,"anchor":"line-1","filing_url":"/filing/0001828865-25-000005","line_url":"/filing/0001828865-25-000005#line-1","is_derivative":false,"issuer_cik":"0000866291","issuer_name":"ALLEGRO MICROSYSTEMS, INC.","issuer_ticker":"ALGM","issuer_name_source":null,"issuer_url":"/issuer/0000866291","owner_cik":"0001828865","owner_name":"Lury Richard R.","owner_display_name":"Lury Richard R.","owner_url":"/insider/0001828865","role":"Director","role_mark":"D","role_mark_label":"Director","role_mark_generic":"Director","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":null,"security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":7000.0,"shares_display":"7,000","price_per_share":31.8104,"price_display":"31.81","price_state":"stated","total_value":222672.8,"total_display":"222,672.80","total_whole":"222,673","shares_owned_after":18857.0,"shares_owned_after_display":"18,857","ownership_form":"D","is_10b5_1":null,"transaction_date":"2025-08-12","filed_date":"2025-08-13","scope":"insider"},{"id":4750949,"accession":"0000950170-25-085405","txn_seq":1,"anchor":"line-1","filing_url":"/filing/0000950170-25-085405","line_url":"/filing/0000950170-25-085405#line-1","is_derivative":false,"issuer_cik":"0000866291","issuer_name":"ALLEGRO MICROSYSTEMS, INC.","issuer_ticker":"ALGM","issuer_name_source":null,"issuer_url":"/issuer/0000866291","owner_cik":"0001828865","owner_name":"Lury Richard R.","owner_display_name":"Lury Richard R.","owner_url":"/insider/0001828865","role":"Director","role_mark":"D","role_mark_label":"Director","role_mark_generic":"Director","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":null,"security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":3100.0,"shares_display":"3,100","price_per_share":30.45,"price_display":"30.45","price_state":"stated","total_value":94395.0,"total_display":"94,395.00","total_whole":"94,395","shares_owned_after":19925.0,"shares_owned_after_display":"19,925","ownership_form":"D","is_10b5_1":null,"transaction_date":"2025-06-11","filed_date":"2025-06-12","scope":"insider"},{"id":5075246,"accession":"0000950170-25-083094","txn_seq":1,"anchor":"line-1","filing_url":"/filing/0000950170-25-083094","line_url":"/filing/0000950170-25-083094#line-1","is_derivative":false,"issuer_cik":"0000866291","issuer_name":"ALLEGRO MICROSYSTEMS, INC.","issuer_ticker":"ALGM","issuer_name_source":null,"issuer_url":"/issuer/0000866291","owner_cik":"0001828865","owner_name":"Lury Richard R.","owner_display_name":"Lury Richard R.","owner_url":"/insider/0001828865","role":"Director","role_mark":"D","role_mark_label":"Director","role_mark_generic":"Director","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":null,"security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":6849.0,"shares_display":"6,849","price_per_share":27.6005,"price_display":"27.60","price_state":"stated","total_value":189035.8245,"total_display":"189,035.82","total_whole":"189,036","shares_owned_after":23025.0,"shares_owned_after_display":"23,025","ownership_form":"D","is_10b5_1":null,"transaction_date":"2025-06-04","filed_date":"2025-06-06","scope":"insider"},{"id":3254597,"accession":"0000950170-24-067331","txn_seq":1,"anchor":"line-1","filing_url":"/filing/0000950170-24-067331","line_url":"/filing/0000950170-24-067331#line-1","is_derivative":false,"issuer_cik":"0000866291","issuer_name":"ALLEGRO MICROSYSTEMS, INC.","issuer_ticker":"ALGM","issuer_name_source":null,"issuer_url":"/issuer/0000866291","owner_cik":"0001828865","owner_name":"Lury Richard R.","owner_display_name":"Lury Richard R.","owner_url":"/insider/0001828865","role":"Director","role_mark":"D","role_mark_label":"Director","role_mark_generic":"Director","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":null,"security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":8500.0,"shares_display":"8,500","price_per_share":30.0,"price_display":"30.00","price_state":"stated","total_value":255000.0,"total_display":"255,000.00","total_whole":"255,000","shares_owned_after":23001.0,"shares_owned_after_display":"23,001","ownership_form":"D","is_10b5_1":null,"transaction_date":"2024-05-30","filed_date":"2024-05-31","scope":"insider"},{"id":8212514,"accession":"0001828865-23-000002","txn_seq":1,"anchor":"line-1","filing_url":"/filing/0001828865-23-000002","line_url":"/filing/0001828865-23-000002#line-1","is_derivative":false,"issuer_cik":"0000866291","issuer_name":"ALLEGRO MICROSYSTEMS, INC.","issuer_ticker":"ALGM","issuer_name_source":null,"issuer_url":"/issuer/0000866291","owner_cik":"0001828865","owner_name":"Lury Richard R.","owner_display_name":"Lury Richard R.","owner_url":"/insider/0001828865","role":"Director","role_mark":"D","role_mark_label":"Director","role_mark_generic":"Director","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":null,"security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":6000.0,"shares_display":"6,000","price_per_share":42.58,"price_display":"42.58","price_state":"stated","total_value":255480.0,"total_display":"255,480.00","total_whole":"255,480","shares_owned_after":27663.0,"shares_owned_after_display":"27,663","ownership_form":"D","is_10b5_1":null,"transaction_date":"2023-02-08","filed_date":"2023-02-10","scope":"insider"},{"id":4808024,"accession":"0001828865-21-000007","txn_seq":1,"anchor":"line-1","filing_url":"/filing/0001828865-21-000007","line_url":"/filing/0001828865-21-000007#line-1","is_derivative":false,"issuer_cik":"0000866291","issuer_name":"ALLEGRO MICROSYSTEMS, INC.","issuer_ticker":"ALGM","issuer_name_source":null,"issuer_url":"/issuer/0000866291","owner_cik":"0001828865","owner_name":"Lury Richard R.","owner_display_name":"Lury Richard R.","owner_url":"/insider/0001828865","role":"Director","role_mark":"D","role_mark_label":"Director","role_mark_generic":"Director","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":null,"security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":11900.0,"shares_display":"11,900","price_per_share":32.6,"price_display":"32.60","price_state":"stated","total_value":387940.0,"total_display":"387,940.00","total_whole":"387,940","shares_owned_after":25300.0,"shares_owned_after_display":"25,300","ownership_form":"D","is_10b5_1":null,"transaction_date":"2021-09-13","filed_date":"2021-09-14","scope":"insider"},{"id":5272296,"accession":"0001828865-21-000005","txn_seq":1,"anchor":"line-1","filing_url":"/filing/0001828865-21-000005","line_url":"/filing/0001828865-21-000005#line-1","is_derivative":false,"issuer_cik":"0000866291","issuer_name":"ALLEGRO MICROSYSTEMS, INC.","issuer_ticker":"ALGM","issuer_name_source":null,"issuer_url":"/issuer/0000866291","owner_cik":"0001828865","owner_name":"Lury Richard R.","owner_display_name":"Lury Richard R.","owner_url":"/insider/0001828865","role":"Director","role_mark":"D","role_mark_label":"Director","role_mark_generic":"Director","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":null,"security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":35700.0,"shares_display":"35,700","price_per_share":29.51,"price_display":"29.51","price_state":"stated","total_value":1053507.0,"total_display":"1,053,507.00","total_whole":"1,053,507","shares_owned_after":37200.0,"shares_owned_after_display":"37,200","ownership_form":"D","is_10b5_1":null,"transaction_date":"2021-08-16","filed_date":"2021-08-17","scope":"insider"},{"id":5461644,"accession":"0001828865-21-000001","txn_seq":1,"anchor":"line-1","filing_url":"/filing/0001828865-21-000001","line_url":"/filing/0001828865-21-000001#line-1","is_derivative":false,"issuer_cik":"0000866291","issuer_name":"ALLEGRO MICROSYSTEMS, INC.","issuer_ticker":"ALGM","issuer_name_source":null,"issuer_url":"/issuer/0000866291","owner_cik":"0001828865","owner_name":"Lury Richard R.","owner_display_name":"Lury Richard R.","owner_url":"/insider/0001828865","role":"Director","role_mark":"D","role_mark_label":"Director","role_mark_generic":"Director","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":null,"security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":11900.0,"shares_display":"11,900","price_per_share":26.06,"price_display":"26.06","price_state":"stated","total_value":310114.0,"total_display":"310,114.00","total_whole":"310,114","shares_owned_after":66592.0,"shares_owned_after_display":"66,592","ownership_form":"D","is_10b5_1":null,"transaction_date":"2021-05-26","filed_date":"2021-05-27","scope":"insider"},{"id":4866843,"accession":"0000899243-21-006114","txn_seq":1,"anchor":"line-1","filing_url":"/filing/0000899243-21-006114","line_url":"/filing/0000899243-21-006114#line-1","is_derivative":false,"issuer_cik":"0000866291","issuer_name":"ALLEGRO MICROSYSTEMS, INC.","issuer_ticker":"ALGM","issuer_name_source":null,"issuer_url":"/issuer/0000866291","owner_cik":"0001828865","owner_name":"Lury Richard R.","owner_display_name":"Lury Richard R.","owner_url":"/insider/0001828865","role":"Director","role_mark":"D","role_mark_label":"Director","role_mark_generic":"Director","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":null,"security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":11709.0,"shares_display":"11,709","price_per_share":29.1638,"price_display":"29.16","price_state":"stated","total_value":341478.9342,"total_display":"341,478.93","total_whole":"341,479","shares_owned_after":78492.0,"shares_owned_after_display":"78,492","ownership_form":"D","is_10b5_1":null,"transaction_date":"2021-02-09","filed_date":"2021-02-11","scope":"insider"}],"collapsed":true,"next_cursor":null,"ledger_fault":false,"count":{"value":9,"kind":"exact"},"open_market_only":false,"composition":{"kind":"exact","rows":[{"code":"P","label":"Open-market purchase","n":0,"open_market":true},{"code":"S","label":"Open-market sale","n":9,"open_market":true},{"code":"M","label":"Option exercise","n":0,"open_market":false},{"code":"A","label":"Grant or award","n":0,"open_market":false},{"code":"F","label":"Tax withholding","n":0,"open_market":false},{"code":"D","label":"Disposition to the issuer","n":0,"open_market":false},{"code":"X","label":"In-the-money option exercise","n":0,"open_market":false}],"total":9},"affiliations":[{"type":"issuer","type_label":"ISSUER","cik":"0000866291","name":"ALLEGRO MICROSYSTEMS, INC.","url":"/issuer/0000866291","role":"Director","n_filings":9,"first_seen":"2021-02-11","last_seen":"2025-08-13"}],"order_statement":"Newest transaction date first, id breaking the tie.","canonical_url":"https://ebomi.com/insider/0001828865","retrieved_at":"2026-08-26T19:29:38+00:00","coverage":{"filings":1506293,"transactions":4290787,"issuers":28597,"insiders":152303,"first_filed_date":"2003-06-30","last_filed_date":"2026-08-25","last_ingest":"2026-08-26T05:24:25.741053+00:00","counts_are":{"filings":"estimate","transactions":"estimate","issuers":"estimate","insiders":"estimate"},"source":"SEC EDGAR Form 4 filings, parsed by ebomi","fault":false},"license":{"underlying_records":"US SEC filings are public records of the United States government and are not subject to copyright. The transactional facts in them are not ours to license.","this_presentation":"The parsing, normalisation, curation, and presentation are ebomi's own work.","grant":"undecided","grant_note":"The open licence for ebomi's own layer is an open owner decision (SPEC-20260731T1159Z open question 3: CC BY 4.0 or CC0 with a citation request). Until it is taken, no grant is asserted here.","citation_request":"Balogh, A. Insider trading. Scientific Data 10, 237 (2023)","url":"https://ebomi.com/license"},"fair_use":{"policy":"These JSON endpoints are open and unauthenticated. Please read them at a human pace, identify your client in the User-Agent header, and use the published dataset for bulk work rather than crawling page by page.","bulk_alternative":"doi:10.1038/s41597-023-02147-6"}}