{"entity":{"type":"insider","cik":"0001473289","url":"/insider/0001473289","json_url":"/insider/0001473289.json","name":"SEIFERT THOMAS J","name_source":"as-filed","also_issuer":false,"cross_url":null},"coverage_statement":{"n_transactions":585,"n_filings":136,"first":"2016-12-15","last":"2026-08-19","span_basis":"filed_date"},"name_variants":[{"name":"SEIFERT THOMAS J","source":"filing","n_filings":136,"first_seen":"2016-12-15","last_seen":"2026-08-19"}],"transactions":[{"id":9298194,"accession":"0001473289-26-000025","txn_seq":7,"anchor":"line-7","filing_url":"/filing/0001473289-26-000025","line_url":"/filing/0001473289-26-000025","is_derivative":false,"issuer_cik":"0001477333","issuer_name":"Cloudflare, Inc.","issuer_ticker":"NET","issuer_name_source":null,"issuer_url":"/issuer/0001477333","owner_cik":"0001473289","owner_name":"SEIFERT THOMAS J","owner_display_name":"SEIFERT THOMAS J","owner_url":"/insider/0001473289","role":"Officer (Chief Financial Officer)","role_mark":"O","role_mark_label":"Officer (Chief Financial Officer)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"Chief Financial Officer","security_title":"Class A Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":10000.0,"shares_display":"10,000","price_per_share":307.31758884,"price_display":"307.32","price_state":"stated","total_value":3073175.8884,"total_display":"3,073,175.89","total_whole":"3,073,176","shares_owned_after":110846.0,"shares_owned_after_display":"110,846","ownership_form":"D","is_10b5_1":null,"transaction_date":"2026-08-17","filed_date":"2026-08-19","scope":"insider","n_lines":7},{"id":5812887,"accession":"0001473289-26-000021","txn_seq":3,"anchor":"line-3","filing_url":"/filing/0001473289-26-000021","line_url":"/filing/0001473289-26-000021","is_derivative":false,"issuer_cik":"0001473289","issuer_name":"Cloudflare, Inc.","issuer_ticker":"NET","issuer_name_source":null,"issuer_url":"/issuer/0001473289","owner_cik":"0001473289","owner_name":"SEIFERT THOMAS J","owner_display_name":"SEIFERT THOMAS J","owner_url":"/insider/0001473289","role":"Officer (Chief Financial Officer)","role_mark":"O","role_mark_label":"Officer (Chief Financial Officer)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"Chief Financial Officer","security_title":"Class A Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":55000.0,"shares_display":"55,000","price_per_share":300.29608569454547,"price_display":"300.30","price_state":"stated","total_value":16516284.7132,"total_display":"16,516,284.71","total_whole":"16,516,285","shares_owned_after":114929.0,"shares_owned_after_display":"114,929","ownership_form":"D","is_10b5_1":null,"transaction_date":"2026-08-04","filed_date":"2026-08-06","scope":"insider","n_lines":2},{"id":5777494,"accession":"0001473289-26-000018","txn_seq":12,"anchor":"line-12","filing_url":"/filing/0001473289-26-000018","line_url":"/filing/0001473289-26-000018","is_derivative":false,"issuer_cik":"0001473289","issuer_name":"Cloudflare, Inc.","issuer_ticker":"NET","issuer_name_source":null,"issuer_url":"/issuer/0001473289","owner_cik":"0001473289","owner_name":"SEIFERT THOMAS J","owner_display_name":"SEIFERT THOMAS J","owner_url":"/insider/0001473289","role":"Officer (Chief Financial Officer)","role_mark":"O","role_mark_label":"Officer (Chief Financial Officer)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"Chief Financial Officer","security_title":"Class A Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":10000.0,"shares_display":"10,000","price_per_share":276.91947512,"price_display":"276.92","price_state":"stated","total_value":2769194.7512,"total_display":"2,769,194.75","total_whole":"2,769,195","shares_owned_after":116091.0,"shares_owned_after_display":"116,091","ownership_form":"D","is_10b5_1":null,"transaction_date":"2026-07-17","filed_date":"2026-07-17","scope":"insider","n_lines":10},{"id":5916432,"accession":"0001473289-26-000016","txn_seq":10,"anchor":"line-10","filing_url":"/filing/0001473289-26-000016","line_url":"/filing/0001473289-26-000016","is_derivative":false,"issuer_cik":"0001473289","issuer_name":"Cloudflare, Inc.","issuer_ticker":"NET","issuer_name_source":null,"issuer_url":"/issuer/0001473289","owner_cik":"0001473289","owner_name":"SEIFERT THOMAS J","owner_display_name":"SEIFERT THOMAS J","owner_url":"/insider/0001473289","role":"Officer (Chief Financial Officer)","role_mark":"O","role_mark_label":"Officer (Chief Financial Officer)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"Chief Financial Officer","security_title":"Class A Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":10000.0,"shares_display":"10,000","price_per_share":232.38872188,"price_display":"232.39","price_state":"stated","total_value":2323887.2188,"total_display":"2,323,887.22","total_whole":"2,323,887","shares_owned_after":119966.0,"shares_owned_after_display":"119,966","ownership_form":"D","is_10b5_1":null,"transaction_date":"2026-06-17","filed_date":"2026-06-17","scope":"insider","n_lines":8},{"id":6166549,"accession":"0001473289-26-000014","txn_seq":10,"anchor":"line-10","filing_url":"/filing/0001473289-26-000014","line_url":"/filing/0001473289-26-000014","is_derivative":false,"issuer_cik":"0001473289","issuer_name":"Cloudflare, Inc.","issuer_ticker":"NET","issuer_name_source":null,"issuer_url":"/issuer/0001473289","owner_cik":"0001473289","owner_name":"SEIFERT THOMAS J","owner_display_name":"SEIFERT THOMAS J","owner_url":"/insider/0001473289","role":"Officer (Chief Financial Officer)","role_mark":"O","role_mark_label":"Officer (Chief Financial Officer)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"Chief Financial Officer","security_title":"Class A Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":10000.0,"shares_display":"10,000","price_per_share":200.6067518,"price_display":"200.61","price_state":"stated","total_value":2006067.518,"total_display":"2,006,067.52","total_whole":"2,006,068","shares_owned_after":214284.0,"shares_owned_after_display":"214,284","ownership_form":"D","is_10b5_1":null,"transaction_date":"2026-05-18","filed_date":"2026-05-19","scope":"insider","n_lines":8},{"id":6021381,"accession":"0001473289-26-000012","txn_seq":9,"anchor":"line-9","filing_url":"/filing/0001473289-26-000012","line_url":"/filing/0001473289-26-000012","is_derivative":false,"issuer_cik":"0001473289","issuer_name":"Cloudflare, Inc.","issuer_ticker":"NET","issuer_name_source":null,"issuer_url":"/issuer/0001473289","owner_cik":"0001473289","owner_name":"SEIFERT THOMAS J","owner_display_name":"SEIFERT THOMAS J","owner_url":"/insider/0001473289","role":"Officer (Chief Financial Officer)","role_mark":"O","role_mark_label":"Officer (Chief Financial Officer)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"Chief Financial Officer","security_title":"Class A Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":10000.0,"shares_display":"10,000","price_per_share":197.97571869,"price_display":"197.98","price_state":"stated","total_value":1979757.1869,"total_display":"1,979,757.19","total_whole":"1,979,757","shares_owned_after":222081.0,"shares_owned_after_display":"222,081","ownership_form":"D","is_10b5_1":null,"transaction_date":"2026-04-17","filed_date":"2026-04-17","scope":"insider","n_lines":7},{"id":5881281,"accession":"0001473289-26-000010","txn_seq":7,"anchor":"line-7","filing_url":"/filing/0001473289-26-000010","line_url":"/filing/0001473289-26-000010","is_derivative":false,"issuer_cik":"0001473289","issuer_name":"Cloudflare, Inc.","issuer_ticker":"NET","issuer_name_source":null,"issuer_url":"/issuer/0001473289","owner_cik":"0001473289","owner_name":"SEIFERT THOMAS J","owner_display_name":"SEIFERT THOMAS J","owner_url":"/insider/0001473289","role":"Officer (Chief Financial Officer)","role_mark":"O","role_mark_label":"Officer (Chief Financial Officer)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"Chief Financial Officer","security_title":"Class A Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":10341.0,"shares_display":"10,341","price_per_share":212.30459810463205,"price_display":"212.30","price_state":"stated","total_value":2195441.849,"total_display":"2,195,441.85","total_whole":"2,195,442","shares_owned_after":226625.0,"shares_owned_after_display":"226,625","ownership_form":"D","is_10b5_1":null,"transaction_date":"2026-03-17","filed_date":"2026-03-17","scope":"insider","n_lines":5},{"id":5894936,"accession":"0001473289-26-000006","txn_seq":18,"anchor":"line-18","filing_url":"/filing/0001473289-26-000006","line_url":"/filing/0001473289-26-000006#line-18","is_derivative":false,"issuer_cik":"0001473289","issuer_name":"Cloudflare, Inc.","issuer_ticker":"NET","issuer_name_source":null,"issuer_url":"/issuer/0001473289","owner_cik":"0001473289","owner_name":"SEIFERT THOMAS J","owner_display_name":"SEIFERT THOMAS J","owner_url":"/insider/0001473289","role":"Officer (Chief Financial Officer)","role_mark":"O","role_mark_label":"Officer (Chief Financial Officer)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"Chief Financial Officer","security_title":"Class A Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":8279.0,"shares_display":"8,279","price_per_share":177.1821,"price_display":"177.18","price_state":"stated","total_value":1466890.6059,"total_display":"1,466,890.61","total_whole":"1,466,891","shares_owned_after":118730.0,"shares_owned_after_display":"118,730","ownership_form":"D","is_10b5_1":null,"transaction_date":"2026-02-20","filed_date":"2026-02-24","scope":"insider"},{"id":5894935,"accession":"0001473289-26-000006","txn_seq":17,"anchor":"line-17","filing_url":"/filing/0001473289-26-000006","line_url":"/filing/0001473289-26-000006#line-17","is_derivative":false,"issuer_cik":"0001473289","issuer_name":"Cloudflare, Inc.","issuer_ticker":"NET","issuer_name_source":null,"issuer_url":"/issuer/0001473289","owner_cik":"0001473289","owner_name":"SEIFERT THOMAS J","owner_display_name":"SEIFERT THOMAS J","owner_url":"/insider/0001473289","role":"Officer (Chief Financial Officer)","role_mark":"O","role_mark_label":"Officer (Chief Financial Officer)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"Chief Financial Officer","security_title":"Class A Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":8133.0,"shares_display":"8,133","price_per_share":191.128,"price_display":"191.13","price_state":"stated","total_value":1554444.024,"total_display":"1,554,444.02","total_whole":"1,554,444","shares_owned_after":93484.0,"shares_owned_after_display":"93,484","ownership_form":"D","is_10b5_1":null,"transaction_date":"2026-02-20","filed_date":"2026-02-24","scope":"insider"},{"id":5894933,"accession":"0001473289-26-000006","txn_seq":16,"anchor":"line-16","filing_url":"/filing/0001473289-26-000006","line_url":"/filing/0001473289-26-000006#line-16","is_derivative":false,"issuer_cik":"0001473289","issuer_name":"Cloudflare, Inc.","issuer_ticker":"NET","issuer_name_source":null,"issuer_url":"/issuer/0001473289","owner_cik":"0001473289","owner_name":"SEIFERT THOMAS J","owner_display_name":"SEIFERT THOMAS J","owner_url":"/insider/0001473289","role":"Officer (Chief Financial Officer)","role_mark":"O","role_mark_label":"Officer (Chief Financial Officer)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"Chief Financial Officer","security_title":"Class A Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":4771.0,"shares_display":"4,771","price_per_share":192.1801,"price_display":"192.18","price_state":"stated","total_value":916891.2571,"total_display":"916,891.26","total_whole":"916,891","shares_owned_after":88713.0,"shares_owned_after_display":"88,713","ownership_form":"D","is_10b5_1":null,"transaction_date":"2026-02-20","filed_date":"2026-02-24","scope":"insider"}],"collapsed":true,"next_cursor":"2026-02-20|5894933","ledger_fault":false,"count":{"value":585,"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":585,"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":585},"affiliations":[{"type":"issuer","type_label":"ISSUER","cik":"0001477333","name":"Cloudflare, Inc.","url":"/issuer/0001477333","role":"Officer (Chief Financial Officer)","n_filings":132,"first_seen":"2020-03-04","last_seen":"2026-08-19"},{"type":"issuer","type_label":"ISSUER","cik":"0001111928","name":"IPG PHOTONICS CORP","url":"/issuer/0001111928","role":"Director","n_filings":4,"first_seen":"2016-12-15","last_seen":"2020-12-08"}],"order_statement":"Newest transaction date first, id breaking the tie.","canonical_url":"https://ebomi.com/insider/0001473289","retrieved_at":"2026-08-22T18:54:11+00:00","coverage":{"filings":1506293,"transactions":4290787,"issuers":28597,"insiders":152303,"first_filed_date":"2003-06-30","last_filed_date":"2026-08-21","last_ingest":"2026-08-22T05:23:40.159918+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"}}