Amphastar Pharmaceuticals, Inc. (AMPH) on GreekSoup https://greeksoup.ai/stocks/us/amph/ Every dated entry in the public record on Amphastar Pharmaceuticals, Inc.: results, filings, insider trades and the rest, from the filings, the last 90 days. en Mon, 12 Oct 2026 00:00:00 +0000 Amphastar Pharmaceuticals, Inc.: short interest 4,405,038 shares at the 30 September 2026 settlement, 7.10 days to coverhttps://greeksoup.ai/stocks/us/amph/short-interest/us:AMPH:short-interest:2026-09-30:e557fb553dWed, 30 Sep 2026 00:00:00 +0000Short interestShort interest. The filing. The page on GreekSoup.

]]> Amphastar Pharmaceuticals, Inc.: Peters William J (CFO, EVP & TREASURER) sold 4,139 shares at $25.00 on 21 September 2026, $103,475https://greeksoup.ai/stocks/us/amph/insiders/us:AMPH:insider:2026-09-23:bedf1b90d7Wed, 23 Sep 2026 00:00:00 +0000Insider tradeInsider trade. The filing. The page on GreekSoup.

]]> Amphastar Pharmaceuticals, Inc.: Form 144, PETERS WILLIAM J plans to sell 4,139 shares worth $103,475 around 21 September 2026https://greeksoup.ai/stocks/us/amph/planned-sales/us:AMPH:planned-sale:2026-09-21:f60ebebb89Mon, 21 Sep 2026 00:00:00 +0000Form 144Form 144. The filing. The page on GreekSoup.

]]> Amphastar Pharmaceuticals, Inc.: Zhou Rong (SENIOR EVP, PRODUCTION CENTER) sold 10,000 shares at $23.94 on 16 September 2026, $239,404https://greeksoup.ai/stocks/us/amph/insiders/us:AMPH:insider:2026-09-17:a68708ba40Thu, 17 Sep 2026 00:00:00 +0000Insider tradeInsider trade. The filing. The page on GreekSoup.

]]> Amphastar Pharmaceuticals, Inc.: short interest 4,994,808 shares at the 15 September 2026 settlement, 10.75 days to coverhttps://greeksoup.ai/stocks/us/amph/short-interest/us:AMPH:short-interest:2026-09-15:f328b66c26Tue, 15 Sep 2026 00:00:00 +0000Short interestShort interest. The filing. The page on GreekSoup.

]]> Amphastar Pharmaceuticals, Inc.: Zhou Rong (SENIOR EVP, PRODUCTION CENTER) sold 3,187 shares at $23.63 on 2 September 2026, $75,306https://greeksoup.ai/stocks/us/amph/insiders/us:AMPH:insider:2026-09-03:01f0dbd48aThu, 03 Sep 2026 00:00:00 +0000Insider tradeInsider trade. The filing. The page on GreekSoup.

]]> Amphastar Pharmaceuticals, Inc.: Form 144, Rong Zhou plans to sell 13,187 shares worth $290,114 around 1 September 2026https://greeksoup.ai/stocks/us/amph/planned-sales/us:AMPH:planned-sale:2026-09-01:a0415b6121Tue, 01 Sep 2026 00:00:00 +0000Form 144Form 144. The filing. The page on GreekSoup.

]]> Amphastar Pharmaceuticals, Inc.: short interest 5,134,473 shares at the 31 August 2026 settlement, 15.36 days to coverhttps://greeksoup.ai/stocks/us/amph/short-interest/us:AMPH:short-interest:2026-08-31:9b2bb1884cMon, 31 Aug 2026 00:00:00 +0000Short interestShort interest. The filing. The page on GreekSoup.

]]> Amphastar Pharmaceuticals, Inc.: Form 144, Floyd Petersen plans to sell 47,101 shares worth $989,121 around 18 August 2026https://greeksoup.ai/stocks/us/amph/planned-sales/us:AMPH:planned-sale:2026-08-18:7c8a677f9dTue, 18 Aug 2026 00:00:00 +0000Form 144Form 144. The filing. The page on GreekSoup.

]]> Amphastar Pharmaceuticals, Inc.: short interest 5,385,239 shares at the 14 August 2026 settlement, 9.96 days to coverhttps://greeksoup.ai/stocks/us/amph/short-interest/us:AMPH:short-interest:2026-08-14:233db02037Fri, 14 Aug 2026 00:00:00 +0000Short interestShort interest. The filing. The page on GreekSoup.

]]> Amphastar Pharmaceuticals, Inc.: Prins Richard K (Director) sold 7,973 shares at $20.30 on 11 August 2026, $161,852https://greeksoup.ai/stocks/us/amph/insiders/us:AMPH:insider:2026-08-12:4b0cc69f56Wed, 12 Aug 2026 00:00:00 +0000Insider tradeInsider trade. The filing. The page on GreekSoup.

]]> Amphastar Pharmaceuticals, Inc.: Form 144, Richard Prins plans to sell 7,973 shares worth $161,932 around 11 August 2026https://greeksoup.ai/stocks/us/amph/planned-sales/us:AMPH:planned-sale:2026-08-11:a1c18a4c95Tue, 11 Aug 2026 00:00:00 +0000Form 144Form 144. The filing. The page on GreekSoup.

]]> Amphastar Pharmaceuticals, Inc.: Peters William J (CFO, EVP & TREASURER) sold 8,180 shares at $22.48 on 7 August 2026, $183,886https://greeksoup.ai/stocks/us/amph/insiders/us:AMPH:insider:2026-08-11:cffaaa36b9Tue, 11 Aug 2026 00:00:00 +0000Insider tradeInsider trade. The filing. The page on GreekSoup.

]]> Amphastar Pharmaceuticals, Inc.: Form 144, PETERS WILLIAM J plans to sell 8,180 shares worth $183,886 around 7 August 2026https://greeksoup.ai/stocks/us/amph/planned-sales/us:AMPH:planned-sale:2026-08-07:5d6b7fa1b4Fri, 07 Aug 2026 00:00:00 +0000Form 144Form 144. The filing. The page on GreekSoup.

]]> Amphastar Pharmaceuticals, Inc. Q2 FY2026 results: revenue $184 million, net income $30 millionhttps://greeksoup.ai/stocks/us/amph/results/fy2026-q2/us:AMPH:result:2026-08-06:4029a705c8Thu, 06 Aug 2026 00:00:00 +0000ResultsResults. The filing. The page on GreekSoup.

]]> Amphastar Pharmaceuticals, Inc. filed 10-Q: 10-qhttps://greeksoup.ai/stocks/us/amph/filings/us:AMPH:filing:2026-08-06:7fc65a705eThu, 06 Aug 2026 00:00:00 +0000SEC filingSEC filing. The filing. The page on GreekSoup.

]]> Amphastar Pharmaceuticals, Inc. filed 8-K: results of operationshttps://greeksoup.ai/stocks/us/amph/filings/us:AMPH:filing:2026-08-06:c7298b8df3Thu, 06 Aug 2026 00:00:00 +0000SEC filingSEC filing. The filing. The page on GreekSoup.

]]> Amphastar Pharmaceuticals, Inc.: short interest 4,928,331 shares at the 31 July 2026 settlement, 11.89 days to coverhttps://greeksoup.ai/stocks/us/amph/short-interest/us:AMPH:short-interest:2026-07-31:8c578912a0Fri, 31 Jul 2026 00:00:00 +0000Short interestShort interest. The filing. The page on GreekSoup.

]]> Amphastar Pharmaceuticals, Inc.: short interest 4,174,460 shares at the 15 July 2026 settlement, 11.15 days to coverhttps://greeksoup.ai/stocks/us/amph/short-interest/us:AMPH:short-interest:2026-07-15:9372e7be3eWed, 15 Jul 2026 00:00:00 +0000Short interestShort interest. The filing. The page on GreekSoup.

]]> Amphastar Pharmaceuticals, Inc.: Schedule 13G filed by Dimensional Fund Advisors LP, 5.2% of the classhttps://greeksoup.ai/stocks/us/amph/holders/us:AMPH:schedule-13:2026-07-14:9c719ffe3fTue, 14 Jul 2026 00:00:00 +0000Schedule 13D/13GSchedule 13D/13G. The filing. The page on GreekSoup.

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