{"transactions":[{"id":740086,"issuer":{"id":4427,"kind":"organization","name":"Vertex, Inc.","symbol":"VERX"},"owners":[{"id":38795,"kind":"person","name":"Radcliffe Amanda Westphal","position":1,"cik":"0001818517","reported_name":"Radcliffe Amanda Westphal","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2026-06-12T16:19:53.000Z","date":"2026-06-10","kind":"grant","planned":false,"acquired":true,"shares":15638,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents an award of restricted stock that will vest on the earlier to occur of (i) the day immediately prior to the date of the next annual meeting of the Company's stockholders, and (ii) June 10, 2027."}],"balance_after":159030,"source":{"system":"sec-edgar","filing":"0001818517-26-000002","document":"form4-06122026_080650.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1818517/000181851726000002/form4-06122026_080650.xml","form_type":"4"}},{"id":1111893,"issuer":{"id":4427,"kind":"organization","name":"Vertex, Inc.","symbol":"VERX"},"owners":[{"id":38795,"kind":"person","name":"Radcliffe Amanda Westphal","position":1,"cik":"0001818517","reported_name":"Radcliffe Amanda Westphal","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2025-06-13T16:28:13.000Z","date":"2025-06-11","kind":"grant","planned":false,"acquired":true,"shares":5327,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents an award of restricted stock that will vest on the earlier to occur of (i) the day immediately prior to the date of the next annual meeting of the Company's stockholders and (ii) June 11, 2026."}],"balance_after":143392,"source":{"system":"sec-edgar","filing":"0001415889-25-017195","document":"form4-06132025_080609.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1818517/000141588925017195/form4-06132025_080609.xml","form_type":"4"}},{"id":1479219,"issuer":{"id":4427,"kind":"organization","name":"Vertex, Inc.","symbol":"VERX"},"owners":[{"id":38795,"kind":"person","name":"Radcliffe Amanda Westphal","position":1,"cik":"0001818517","reported_name":"Radcliffe Amanda Westphal","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2024-06-14T16:17:18.000Z","date":"2024-06-12","kind":"grant","planned":false,"acquired":true,"shares":5705,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents an award of restricted stock that will vest on the earlier to occur of (i) the day immediately prior to the date of the next annual meeting of the Company's stockholders and (ii) June 12, 2025."}],"balance_after":138065,"source":{"system":"sec-edgar","filing":"0001415889-24-016890","document":"form4-06142024_080615.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1818517/000141588924016890/form4-06142024_080615.xml","form_type":"4"}},{"id":1718006,"issuer":{"id":4427,"kind":"organization","name":"Vertex, Inc.","symbol":"VERX"},"owners":[{"id":38795,"kind":"person","name":"Radcliffe Amanda Westphal","position":1,"cik":"0001818517","reported_name":"Radcliffe Amanda Westphal","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class B Common Stock","published_at":"2023-12-08T16:31:11.000Z","date":"2023-12-06","kind":"other","planned":false,"acquired":true,"shares":789000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"The Class B Common Stock is convertible at any time at the option of the holder into one share of the Issuer's Class A Common Stock and has no expiration date. The Class B Common Stock will automatically convert into shares of the Issuer's Class A Common Stock on a one-to-one basis upon either (1) any transfer of the Class B Common Stock by the holder, whether or not for value, subject to certain exceptions or (2) the voting power of the Issuer's outstanding Class B Common Stock representing less than 10% of the combined voing power of all of the Issuer's outstanding common stock."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"The Class B Common Stock is convertible at any time at the option of the holder into one share of the Issuer's Class A Common Stock and has no expiration date. The Class B Common Stock will automatically convert into shares of the Issuer's Class A Common Stock on a one-to-one basis upon either (1) any transfer of the Class B Common Stock by the holder, whether or not for value, subject to certain exceptions or (2) the voting power of the Issuer's outstanding Class B Common Stock representing less than 10% of the combined voing power of all of the Issuer's outstanding common stock."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"The Class B Common Stock is convertible at any time at the option of the holder into one share of the Issuer's Class A Common Stock and has no expiration date. The Class B Common Stock will automatically convert into shares of the Issuer's Class A Common Stock on a one-to-one basis upon either (1) any transfer of the Class B Common Stock by the holder, whether or not for value, subject to certain exceptions or (2) the voting power of the Issuer's outstanding Class B Common Stock representing less than 10% of the combined voing power of all of the Issuer's outstanding common stock."}],"balance_after":838000,"derivative":{"underlying":"Class A Common Stock","underlying_shares":789000},"source":{"system":"sec-edgar","filing":"0001104659-23-124730","document":"tm2331951-6_4seq1.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1818517/000110465923124730/tm2331951-6_4seq1.xml","form_type":"4"}},{"id":1854578,"issuer":{"id":4427,"kind":"organization","name":"Vertex, Inc.","symbol":"VERX"},"owners":[{"id":38795,"kind":"person","name":"Radcliffe Amanda Westphal","position":1,"cik":"0001818517","reported_name":"Radcliffe Amanda Westphal","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2023-06-15T16:17:49.000Z","date":"2023-06-13","kind":"grant","planned":false,"acquired":true,"shares":8815,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents an award of restricted stock that will vest on the earlier to occur of (i) the day immediately prior to the date of the next annual meeting of the Company's stockholders and (ii) June 13, 2024."}],"balance_after":132360,"source":{"system":"sec-edgar","filing":"0001415889-23-009820","document":"form4-06152023_080646.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1818517/000141588923009820/form4-06152023_080646.xml","form_type":"4"}},{"id":2231581,"issuer":{"id":4427,"kind":"organization","name":"Vertex, Inc.","symbol":"VERX"},"owners":[{"id":38795,"kind":"person","name":"Radcliffe Amanda Westphal","position":1,"cik":"0001818517","reported_name":"Radcliffe Amanda Westphal","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2022-06-15T16:22:48.000Z","date":"2022-06-14","kind":"grant","acquired":true,"shares":15121,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents an award of restricted stock that will vest on the earlier to occur of (i) the day immediately prior to the date of the next annual meeting of the Company's stockholders and (ii) June 14, 2023."}],"balance_after":123545,"source":{"system":"sec-edgar","filing":"0001415889-22-006595","document":"form4-06152022_010637.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1818517/000141588922006595/form4-06152022_010637.xml","form_type":"4"}},{"id":2330968,"issuer":{"id":4427,"kind":"organization","name":"Vertex, Inc.","symbol":"VERX"},"owners":[{"id":38795,"kind":"person","name":"Radcliffe Amanda Westphal","position":1,"cik":"0001818517","reported_name":"Radcliffe Amanda Westphal","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2022-03-16T16:06:47.000Z","date":"2022-03-15","kind":"purchase","acquired":true,"shares":7825,"price":12.9137,"value":101049.7025,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The price reported in Column 4 is a weighted average price.  These shares were purchased in multiple transactions ranging from $12.785 to $13.04, inclusive.  The Reporting Person undertakes to provide to the Issuer, any securityholder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the range set forth above."}],"balance_after":108424,"source":{"system":"sec-edgar","filing":"0001415889-22-003048","document":"form4-03162022_010336.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1818517/000141588922003048/form4-03162022_010336.xml","form_type":"4"}},{"id":2714681,"issuer":{"id":4427,"kind":"organization","name":"Vertex, Inc.","symbol":"VERX"},"owners":[{"id":38795,"kind":"person","name":"Radcliffe Amanda Westphal","position":1,"cik":"0001818517","reported_name":"Radcliffe Amanda Westphal","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Class A Common Stock","published_at":"2021-05-13T17:41:56.000Z","date":"2021-05-11","kind":"grant","acquired":true,"shares":8494,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F2","text":"Represents an award of restricted stock that will vest on the earlier to occur of (i) the day immediately prior to the date of the next annual meeting of the Company's stockholders and (ii) May 11, 2022."}],"balance_after":100599,"source":{"system":"sec-edgar","filing":"0001104659-21-066089","document":"tm2115866-2_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1818517/000110465921066089/tm2115866-2_4seq1.xml","form_type":"4"}},{"id":2714680,"issuer":{"id":4427,"kind":"organization","name":"Vertex, Inc.","symbol":"VERX"},"owners":[{"id":38795,"kind":"person","name":"Radcliffe Amanda Westphal","position":1,"cik":"0001818517","reported_name":"Radcliffe Amanda Westphal","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Class A Common Stock","published_at":"2021-05-13T17:41:56.000Z","date":"2020-07-31","kind":"purchase","acquired":true,"shares":84210,"price":19,"value":1599990.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents shares held jointly by the Reporting Person and her spouse."}],"balance_after":92105,"source":{"system":"sec-edgar","filing":"0001104659-21-066089","document":"tm2115866-2_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1818517/000110465921066089/tm2115866-2_4seq1.xml","form_type":"4"}}]}