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These shares were sold in multiple transactions at prices ranging from $5.825 to $6.05, 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 this footnote."}],"balance_after":516626,"source":{"system":"sec-edgar","filing":"0001209191-18-063022","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1352447/000120919118063022/doc4.xml","form_type":"4"}},{"id":3778899,"issuer":{"id":155913,"kind":"organization","name":"ARATANA THERAPEUTICS, INC.","symbol":"PETX"},"owners":[{"id":161718,"kind":"person","name":"St Peter Steven","position":1,"cik":"0001352447","reported_name":"St Peter Steven","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"PRESIDENT AND CEO"}}],"security":"Common Stock","published_at":"2018-10-31T18:00:28.000Z","date":"2018-10-30","kind":"sale","acquired":false,"shares":11513,"price":5.8589,"value":67453.5157,"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 September 13, 2017."},{"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 $5.84 to $5.90, 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 this footnote."}],"balance_after":562720,"source":{"system":"sec-edgar","filing":"0001209191-18-056699","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1352447/000120919118056699/doc4.xml","form_type":"4"}},{"id":3809722,"issuer":{"id":155913,"kind":"organization","name":"ARATANA THERAPEUTICS, INC.","symbol":"PETX"},"owners":[{"id":161718,"kind":"person","name":"St Peter Steven","position":1,"cik":"0001352447","reported_name":"St Peter Steven","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"PRESIDENT AND CEO"}}],"security":"Common Stock","published_at":"2018-09-21T18:31:01.000Z","date":"2018-09-21","kind":"sale","acquired":false,"shares":75000,"price":6.0574,"value":454305.0,"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."},{"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 $6.00 to $6.25, 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 this footnote."}],"balance_after":574233,"source":{"system":"sec-edgar","filing":"0001209191-18-051980","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1352447/000120919118051980/doc4.xml","form_type":"4"}},{"id":3858887,"issuer":{"id":155913,"kind":"organization","name":"ARATANA THERAPEUTICS, INC.","symbol":"PETX"},"owners":[{"id":161718,"kind":"person","name":"St Peter Steven","position":1,"cik":"0001352447","reported_name":"St Peter Steven","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"PRESIDENT AND CEO"}}],"security":"Common Stock","published_at":"2018-07-30T17:51:10.000Z","date":"2018-07-30","kind":"sale","acquired":false,"shares":11513,"price":4.3292,"value":49842.0796,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sale reported in this Form 4 was effected pursuant to a 10b5-1 plan adopted by the Reporting Person on September 13, 2017."},{"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 $4.30 to $4.35, 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 this footnote."}],"balance_after":649233,"source":{"system":"sec-edgar","filing":"0001209191-18-044452","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1352447/000120919118044452/doc4.xml","form_type":"4"}},{"id":3951733,"issuer":{"id":155913,"kind":"organization","name":"ARATANA THERAPEUTICS, INC.","symbol":"PETX"},"owners":[{"id":161718,"kind":"person","name":"St Peter Steven","position":1,"cik":"0001352447","reported_name":"St Peter Steven","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"PRESIDENT AND CEO"}}],"security":"Common Stock","published_at":"2018-05-01T20:00:36.000Z","date":"2018-04-30","kind":"sale","acquired":false,"shares":11513,"price":5.0015,"value":57582.2695,"ownership":{"direct":true},"footnotes":[{"field":"date","element":"transactionDate","label":"F1","text":"This Form 4/A has been filed solely to change the code reported in Column 4 of Table I of the Reporting Person's Form 4 filed on April 30, 2018, which had inadvertently noted an \"A\" instead of \"D\" to reflect a disposition of the Issuer's common stock, due to an administrative error."},{"field":"kind","element":"transactionCoding","label":"F2","text":"The sale reported in this Form 4 was effected pursuant to a 10b5-1 plan adopted by the Reporting Person on September 13, 2017."},{"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 $4.99 to $5.05, 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 this footnote."},{"field":"acquired","element":"transactionAcquiredDisposedCode","label":"F1","text":"This Form 4/A has been filed solely to change the code reported in Column 4 of Table I of the Reporting Person's Form 4 filed on April 30, 2018, which had inadvertently noted an \"A\" instead of \"D\" to reflect a disposition of the Issuer's common stock, due to an administrative error."}],"balance_after":660746,"source":{"system":"sec-edgar","filing":"0001209191-18-027217","document":"doc4a.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1352447/000120919118027217/doc4a.xml","form_type":"4/A","original_submission_date":"2018-04-30"}},{"id":3953466,"issuer":{"id":155913,"kind":"organization","name":"ARATANA THERAPEUTICS, INC.","symbol":"PETX"},"owners":[{"id":161718,"kind":"person","name":"St Peter Steven","position":1,"cik":"0001352447","reported_name":"St Peter Steven","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"PRESIDENT AND CEO"}}],"security":"Common Stock","published_at":"2018-04-30T17:49:31.000Z","date":"2018-04-30","kind":"sale","acquired":true,"shares":11513,"price":5.0015,"value":57582.2695,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sale reported in this Form 4 was effected pursuant to a 10b5-1 plan adopted by the Reporting Person on September 13, 2017."},{"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 $4.99 to $5.05, 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 this footnote."}],"balance_after":660746,"source":{"system":"sec-edgar","filing":"0001209191-18-026909","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1352447/000120919118026909/doc4.xml","form_type":"4"}},{"id":4081564,"issuer":{"id":155913,"kind":"organization","name":"ARATANA THERAPEUTICS, INC.","symbol":"PETX"},"owners":[{"id":161718,"kind":"person","name":"St Peter Steven","position":1,"cik":"0001352447","reported_name":"St Peter Steven","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"PRESIDENT AND CEO"}}],"security":"Common Stock","published_at":"2018-02-01T17:29:47.000Z","date":"2018-01-30","kind":"sale","acquired":false,"shares":19367,"price":4.7659,"value":92301.1853,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sale reported in this Form 4 was effected pursuant to a 10b5-1 plan adopted by the Reporting Person on September 13, 2017."},{"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 $4.700 to $4.865, 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 this footnote."}],"balance_after":672259,"source":{"system":"sec-edgar","filing":"0001209191-18-006531","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1352447/000120919118006531/doc4.xml","form_type":"4"}},{"id":4087941,"issuer":{"id":155913,"kind":"organization","name":"ARATANA THERAPEUTICS, INC.","symbol":"PETX"},"owners":[{"id":161718,"kind":"person","name":"St Peter Steven","position":1,"cik":"0001352447","reported_name":"St Peter Steven","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"PRESIDENT AND CEO"}}],"security":"Stock Option (Right to 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This sale constitutes the final sale under such trading plan."},{"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 $6.005 to $6.355, 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 this footnote."}],"balance_after":579359,"source":{"system":"sec-edgar","filing":"0001209191-17-055949","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1352447/000120919117055949/doc4.xml","form_type":"4"}},{"id":4350482,"issuer":{"id":155913,"kind":"organization","name":"ARATANA THERAPEUTICS, INC.","symbol":"PETX"},"owners":[{"id":161718,"kind":"person","name":"St Peter Steven","position":1,"cik":"0001352447","reported_name":"St Peter Steven","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"PRESIDENT AND CEO"}}],"security":"Stock Option (Right to Buy)","published_at":"2017-04-18T18:06:17.000Z","date":"2017-04-17","kind":"exercise","acquired":false,"shares":46666,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"Vests as to 25% of the total number of shares (rounded down to the nearest whole share) on January 29, 2017 and as to an additional 1/48th of the total number of shares (rounded down to the nearest whole share) on the same day of each of the 36 successive calendar months thereafter, such that the stock option shall be vested as to all shares on January 29, 2020, subject to continued service with the Issuer through the applicable vesting dates."}],"balance_after":113334,"derivative":{"exercise_price":3.14,"expiration_date":"2026-01-21","underlying":"Common Stock","underlying_shares":46666},"source":{"system":"sec-edgar","filing":"0001209191-17-027348","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1352447/000120919117027348/doc4.xml","form_type":"4"}},{"id":4350481,"issuer":{"id":155913,"kind":"organization","name":"ARATANA THERAPEUTICS, INC.","symbol":"PETX"},"owners":[{"id":161718,"kind":"person","name":"St Peter Steven","position":1,"cik":"0001352447","reported_name":"St Peter Steven","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"PRESIDENT AND CEO"}}],"security":"Common Stock","published_at":"2017-04-18T18:06:17.000Z","date":"2017-04-17","kind":"exercise","acquired":true,"shares":46666,"price":3.14,"value":146531.24,"ownership":{"direct":true},"balance_after":629359,"source":{"system":"sec-edgar","filing":"0001209191-17-027348","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1352447/000120919117027348/doc4.xml","form_type":"4"}},{"id":4350480,"issuer":{"id":155913,"kind":"organization","name":"ARATANA THERAPEUTICS, INC.","symbol":"PETX"},"owners":[{"id":161718,"kind":"person","name":"St Peter Steven","position":1,"cik":"0001352447","reported_name":"St Peter Steven","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"PRESIDENT AND CEO"}}],"security":"Common Stock","published_at":"2017-04-18T18:06:17.000Z","date":"2017-04-17","kind":"sale","acquired":false,"shares":50000,"price":5.543,"value":277150.0,"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 November 8, 2016."},{"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 $5.47 to $5.70, 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 this footnote."}],"balance_after":582693,"source":{"system":"sec-edgar","filing":"0001209191-17-027348","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1352447/000120919117027348/doc4.xml","form_type":"4"}},{"id":4475037,"issuer":{"id":155913,"kind":"organization","name":"ARATANA THERAPEUTICS, INC.","symbol":"PETX"},"owners":[{"id":161718,"kind":"person","name":"St Peter Steven","position":1,"cik":"0001352447","reported_name":"St Peter Steven","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"PRESIDENT AND CEO"}}],"security":"Common Stock","published_at":"2017-01-31T18:03:49.000Z","date":"2017-01-27","kind":"sale","acquired":false,"shares":50000,"price":7.7175,"value":385875.0,"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."},{"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 $7.70 to $7.87, 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 this footnote."}],"balance_after":632693,"source":{"system":"sec-edgar","filing":"0001209191-17-006464","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1352447/000120919117006464/doc4.xml","form_type":"4"}},{"id":4489684,"issuer":{"id":155913,"kind":"organization","name":"ARATANA THERAPEUTICS, INC.","symbol":"PETX"},"owners":[{"id":161718,"kind":"person","name":"St Peter Steven","position":1,"cik":"0001352447","reported_name":"St Peter Steven","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"PRESIDENT AND CEO"}}],"security":"Stock Option (Right to 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