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The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes (2) through (5) to this Form 4."}],"balance_after":473569,"source":{"system":"sec-edgar","filing":"0001209191-21-057033","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1816977/000120919121057033/doc4.xml","form_type":"4"}},{"id":2595096,"issuer":{"id":6040,"kind":"organization","name":"ALX ONCOLOGY HOLDINGS INC"},"owners":[{"id":82914,"kind":"person","name":"Pons Jaume","position":1,"cik":"0001816977","reported_name":"Pons Jaume","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President & CEO"}}],"security":"Common Stock","published_at":"2021-08-20T20:07:52.000Z","date":"2021-08-19","kind":"sale","acquired":false,"shares":617,"price":66.2423,"value":40871.4991,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on January 28, 2021."},{"field":"price","element":"transactionPricePerShare","label":"F9","text":"The price reported in Column 4 is a weighted average price. 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These shares were sold in multiple transactions at prices ranging from $64.87 to $65.85, inclusive."}],"balance_after":478615,"source":{"system":"sec-edgar","filing":"0001209191-21-052864","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1816977/000120919121052864/doc4.xml","form_type":"4"}},{"id":2595094,"issuer":{"id":6040,"kind":"organization","name":"ALX ONCOLOGY HOLDINGS INC"},"owners":[{"id":82914,"kind":"person","name":"Pons Jaume","position":1,"cik":"0001816977","reported_name":"Pons Jaume","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President & CEO"}}],"security":"Common Stock","published_at":"2021-08-20T20:07:52.000Z","date":"2021-08-19","kind":"sale","acquired":false,"shares":556,"price":64.2201,"value":35706.3756,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on January 28, 2021."},{"field":"price","element":"transactionPricePerShare","label":"F7","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $63.63 to $64.625, inclusive."}],"balance_after":479988,"source":{"system":"sec-edgar","filing":"0001209191-21-052864","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1816977/000120919121052864/doc4.xml","form_type":"4"}},{"id":2595093,"issuer":{"id":6040,"kind":"organization","name":"ALX ONCOLOGY HOLDINGS INC"},"owners":[{"id":82914,"kind":"person","name":"Pons Jaume","position":1,"cik":"0001816977","reported_name":"Pons Jaume","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President & CEO"}}],"security":"Common Stock","published_at":"2021-08-20T20:07:52.000Z","date":"2021-08-19","kind":"sale","acquired":false,"shares":1190,"price":62.8441,"value":74784.479,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on January 28, 2021."},{"field":"price","element":"transactionPricePerShare","label":"F6","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $62.46 to $63.34, inclusive."}],"balance_after":480544,"source":{"system":"sec-edgar","filing":"0001209191-21-052864","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1816977/000120919121052864/doc4.xml","form_type":"4"}},{"id":2595092,"issuer":{"id":6040,"kind":"organization","name":"ALX ONCOLOGY HOLDINGS INC"},"owners":[{"id":82914,"kind":"person","name":"Pons Jaume","position":1,"cik":"0001816977","reported_name":"Pons Jaume","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President & CEO"}}],"security":"Common Stock","published_at":"2021-08-20T20:07:52.000Z","date":"2021-08-19","kind":"sale","acquired":false,"shares":1324,"price":61.9122,"value":81971.7528,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on January 28, 2021."},{"field":"price","element":"transactionPricePerShare","label":"F5","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $61.45 to $62.44, inclusive."}],"balance_after":481734,"source":{"system":"sec-edgar","filing":"0001209191-21-052864","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1816977/000120919121052864/doc4.xml","form_type":"4"}},{"id":2595091,"issuer":{"id":6040,"kind":"organization","name":"ALX ONCOLOGY HOLDINGS INC"},"owners":[{"id":82914,"kind":"person","name":"Pons Jaume","position":1,"cik":"0001816977","reported_name":"Pons Jaume","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President & CEO"}}],"security":"Common Stock","published_at":"2021-08-20T20:07:52.000Z","date":"2021-08-19","kind":"sale","acquired":false,"shares":4007,"price":60.7768,"value":243532.6376,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on January 28, 2021."},{"field":"price","element":"transactionPricePerShare","label":"F4","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $60.44 to $61.43, inclusive."}],"balance_after":483058,"source":{"system":"sec-edgar","filing":"0001209191-21-052864","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1816977/000120919121052864/doc4.xml","form_type":"4"}},{"id":2595090,"issuer":{"id":6040,"kind":"organization","name":"ALX ONCOLOGY HOLDINGS INC"},"owners":[{"id":82914,"kind":"person","name":"Pons Jaume","position":1,"cik":"0001816977","reported_name":"Pons Jaume","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President & CEO"}}],"security":"Common Stock","published_at":"2021-08-20T20:07:52.000Z","date":"2021-08-19","kind":"sale","acquired":false,"shares":7633,"price":59.793,"value":456399.969,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on January 28, 2021."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $59.44 to $60.435, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes (2) and (4) through (9) to this Form 4."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"Includes 152 shares acquired under the Issuer's employee stock purchase plan on June 30, 2021."}],"balance_after":487065,"source":{"system":"sec-edgar","filing":"0001209191-21-052864","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1816977/000120919121052864/doc4.xml","form_type":"4"}},{"id":2618030,"issuer":{"id":6040,"kind":"organization","name":"ALX ONCOLOGY HOLDINGS INC"},"owners":[{"id":82914,"kind":"person","name":"Pons Jaume","position":1,"cik":"0001816977","reported_name":"Pons Jaume","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President & CEO"}}],"security":"Employee Stock Option (right to buy)","published_at":"2021-08-03T17:04:18.000Z","date":"2021-07-30","kind":"grant","acquired":true,"shares":225000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"Shares subject to the option vest in 48 equal monthly installments beginning on August 30, 2021."}],"balance_after":225000,"derivative":{"exercise_price":58.56,"expiration_date":"2031-07-29","underlying":"Common Stock","underlying_shares":225000},"source":{"system":"sec-edgar","filing":"0001209191-21-049385","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1816977/000120919121049385/doc4.xml","form_type":"4"}},{"id":2629351,"issuer":{"id":6040,"kind":"organization","name":"ALX ONCOLOGY HOLDINGS INC"},"owners":[{"id":82914,"kind":"person","name":"Pons Jaume","position":1,"cik":"0001816977","reported_name":"Pons Jaume","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President & CEO"}}],"security":"Common Stock","published_at":"2021-07-20T16:12:58.000Z","date":"2021-07-19","kind":"sale","acquired":false,"shares":5900,"price":55.082,"value":324983.8,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on January 28, 2021."},{"field":"price","element":"transactionPricePerShare","label":"F4","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $55.03 to $55.23, inclusive."}],"balance_after":494546,"source":{"system":"sec-edgar","filing":"0001209191-21-047365","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1816977/000120919121047365/doc4.xml","form_type":"4"}},{"id":2629350,"issuer":{"id":6040,"kind":"organization","name":"ALX ONCOLOGY HOLDINGS INC"},"owners":[{"id":82914,"kind":"person","name":"Pons Jaume","position":1,"cik":"0001816977","reported_name":"Pons Jaume","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President & CEO"}}],"security":"Common Stock","published_at":"2021-07-20T16:12:58.000Z","date":"2021-07-19","kind":"sale","acquired":false,"shares":9500,"price":54.374,"value":516553.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on January 28, 2021."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $54.00 to $54.95, inclusive."}],"balance_after":500446,"source":{"system":"sec-edgar","filing":"0001209191-21-047365","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1816977/000120919121047365/doc4.xml","form_type":"4"}},{"id":2629349,"issuer":{"id":6040,"kind":"organization","name":"ALX ONCOLOGY HOLDINGS INC"},"owners":[{"id":82914,"kind":"person","name":"Pons Jaume","position":1,"cik":"0001816977","reported_name":"Pons Jaume","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President & CEO"}}],"security":"Common Stock","published_at":"2021-07-20T16:12:58.000Z","date":"2021-07-19","kind":"sale","acquired":false,"shares":1300,"price":53.6217,"value":69708.21,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on January 28, 2021."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $53.00 to $53.98, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes (2), (3) and (4) to this Form 4."}],"balance_after":509946,"source":{"system":"sec-edgar","filing":"0001209191-21-047365","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1816977/000120919121047365/doc4.xml","form_type":"4"}},{"id":2659126,"issuer":{"id":6040,"kind":"organization","name":"ALX ONCOLOGY HOLDINGS INC"},"owners":[{"id":82914,"kind":"person","name":"Pons Jaume","position":1,"cik":"0001816977","reported_name":"Pons Jaume","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President & CEO"}}],"security":"Common Stock","published_at":"2021-06-22T16:26:18.000Z","date":"2021-06-21","kind":"sale","acquired":false,"shares":10353,"price":58.9178,"value":609975.9834,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on January 28, 2021."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $58.58 to $59.22, inclusive."}],"balance_after":511246,"source":{"system":"sec-edgar","filing":"0001209191-21-042395","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1816977/000120919121042395/doc4.xml","form_type":"4"}},{"id":2659125,"issuer":{"id":6040,"kind":"organization","name":"ALX ONCOLOGY HOLDINGS INC"},"owners":[{"id":82914,"kind":"person","name":"Pons Jaume","position":1,"cik":"0001816977","reported_name":"Pons Jaume","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President & CEO"}}],"security":"Common Stock","published_at":"2021-06-22T16:26:18.000Z","date":"2021-06-21","kind":"sale","acquired":false,"shares":6347,"price":58.0596,"value":368504.2812,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on January 28, 2021."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $57.56 to $58.51, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes (2) and (3) to this Form 4."}],"balance_after":521599,"source":{"system":"sec-edgar","filing":"0001209191-21-042395","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1816977/000120919121042395/doc4.xml","form_type":"4"}},{"id":2703477,"issuer":{"id":6040,"kind":"organization","name":"ALX ONCOLOGY HOLDINGS INC"},"owners":[{"id":82914,"kind":"person","name":"Pons Jaume","position":1,"cik":"0001816977","reported_name":"Pons Jaume","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President & CEO"}}],"security":"Common Stock","published_at":"2021-05-20T19:52:37.000Z","date":"2021-05-19","kind":"sale","acquired":false,"shares":979,"price":56.7054,"value":55514.5866,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on January 28, 2021."},{"field":"shares","element":"transactionShares","label":"F4","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $56.59 to $56.83, inclusive."}],"balance_after":527946,"source":{"system":"sec-edgar","filing":"0001209191-21-034662","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1816977/000120919121034662/doc4.xml","form_type":"4"}},{"id":2703476,"issuer":{"id":6040,"kind":"organization","name":"ALX ONCOLOGY HOLDINGS INC"},"owners":[{"id":82914,"kind":"person","name":"Pons Jaume","position":1,"cik":"0001816977","reported_name":"Pons Jaume","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President & CEO"}}],"security":"Common Stock","published_at":"2021-05-20T19:52:37.000Z","date":"2021-05-19","kind":"sale","acquired":false,"shares":15221,"price":55.6901,"value":847659.0121,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on January 28, 2021."},{"field":"shares","element":"transactionShares","label":"F3","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $55.50 to $56.35, inclusive."}],"balance_after":528925,"source":{"system":"sec-edgar","filing":"0001209191-21-034662","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1816977/000120919121034662/doc4.xml","form_type":"4"}},{"id":2703475,"issuer":{"id":6040,"kind":"organization","name":"ALX ONCOLOGY HOLDINGS INC"},"owners":[{"id":82914,"kind":"person","name":"Pons Jaume","position":1,"cik":"0001816977","reported_name":"Pons Jaume","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President & CEO"}}],"security":"Common Stock","published_at":"2021-05-20T19:52:37.000Z","date":"2021-05-19","kind":"sale","acquired":false,"shares":500,"price":54.2048,"value":27102.4,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on January 28, 2021."},{"field":"shares","element":"transactionShares","label":"F2","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $53.53 to $54.52, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes (2) through (4) to this Form 4."}],"balance_after":544146,"source":{"system":"sec-edgar","filing":"0001209191-21-034662","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1816977/000120919121034662/doc4.xml","form_type":"4"}},{"id":2743182,"issuer":{"id":6040,"kind":"organization","name":"ALX ONCOLOGY HOLDINGS INC"},"owners":[{"id":82914,"kind":"person","name":"Pons Jaume","position":1,"cik":"0001816977","reported_name":"Pons Jaume","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President & CEO"}}],"security":"Common Stock","published_at":"2021-04-21T16:14:46.000Z","date":"2021-04-19","kind":"sale","acquired":false,"shares":837,"price":60.4753,"value":50617.8261,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on January 28, 2021."},{"field":"price","element":"transactionPricePerShare","label":"F6","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $60.27 to $61.01, inclusive."}],"balance_after":544646,"source":{"system":"sec-edgar","filing":"0000899243-21-016591","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1816977/000089924321016591/doc4.xml","form_type":"4"}},{"id":2743181,"issuer":{"id":6040,"kind":"organization","name":"ALX ONCOLOGY HOLDINGS INC"},"owners":[{"id":82914,"kind":"person","name":"Pons Jaume","position":1,"cik":"0001816977","reported_name":"Pons Jaume","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President & CEO"}}],"security":"Common Stock","published_at":"2021-04-21T16:14:46.000Z","date":"2021-04-19","kind":"sale","acquired":false,"shares":663,"price":59.5174,"value":39460.0362,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on January 28, 2021."},{"field":"price","element":"transactionPricePerShare","label":"F5","text":"The price reported in Column 4 is a weighted average price. 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The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes (2) through (8) to this Form 4."}],"balance_after":566846,"source":{"system":"sec-edgar","filing":"0000899243-21-013283","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1816977/000089924321013283/doc4.xml","form_type":"4"}},{"id":2773313,"issuer":{"id":6040,"kind":"organization","name":"ALX ONCOLOGY HOLDINGS INC"},"owners":[{"id":82914,"kind":"person","name":"Pons Jaume","position":1,"cik":"0001816977","reported_name":"Pons Jaume","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Common 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Issuer's initial public offering of Common Stock and had no expiration date."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F4","text":"Includes 4,982 shares of Common Stock issued as payment of accrued dividends upon conversion of the preferred stock on July 21, 2020."}],"balance_after":541346,"source":{"system":"sec-edgar","filing":"0000899243-20-019904","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1816977/000089924320019904/doc4.xml","form_type":"4"}},{"id":3080680,"issuer":{"id":6040,"kind":"organization","name":"ALX ONCOLOGY HOLDINGS INC"},"owners":[{"id":82914,"kind":"person","name":"Pons Jaume","position":1,"cik":"0001816977","reported_name":"Pons Jaume","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President &CEO"}}],"security":"Employee Stock Option (right to buy)","published_at":"2020-07-17T19:00:22.000Z","date":"2020-07-16","kind":"grant","acquired":true,"shares":272771,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"Shares subject to the option vest in 48 equal monthly installments beginning on August 16, 2020."}],"balance_after":272771,"derivative":{"exercise_price":19,"expiration_date":"2030-07-16","underlying":"Common Stock","underlying_shares":272771},"source":{"system":"sec-edgar","filing":"0000899243-20-019572","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1816977/000089924320019572/doc4.xml","form_type":"4"}}]}