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Amphastar Pharmaceuticals, Inc. — Insider Transactions

Form 4 filings by directors, officers, and 10%+ shareholders

SEC rules require corporate insiders — including directors, executive officers, and any shareholder owning more than 10% of a company's shares — to report changes in their ownership within two business days of a transaction. These disclosures are filed as Form 4. Open-market purchases (code P) are generally considered the most meaningful signal, as insiders are spending their own money.

Overview All Filings Annual Quarterly Insiders
Insider Title Type Shares Price Value Owns After Date
Petersen Floyd F. Sale 400 $20.26 $8,104 59,117 Dec 1, 2016
Shandell Jason B. President and General Counsel Sale 24,292 $20.47 $497,257 202,961 Nov 28, 2016
Lee Howard Option Exercise 20,000 $14.23 $284,600 134,527 Nov 14, 2016
PRINS RICHARD K Sale 8,000 $20.06 $160,480 23,000 Nov 11, 2016
Petersen Floyd F. Sale 400 $18.09 $7,236 59,517 Nov 1, 2016
Petersen Floyd F. Sale 400 $18.75 $7,500 59,917 Oct 3, 2016
Shandell Jason B. President and General Counsel Option Exercise 56,996 $10.93 $622,966 259,957 Sep 26, 2016
Zhang Jack Y. CEO & Chief Science Officer Sale 76,152 $20.73 $1,578,631 1,219,533 Sep 20, 2016
Petersen Floyd F. Sale 3,000 $19.05 $57,150 60,317 Sep 8, 2016
Lee Howard Sale 10,381 $18.78 $194,955 114,527 Sep 1, 2016
Shandell Jason B. President and General Counsel Option Exercise 10,000 $10.46 $104,600 212,961 Aug 22, 2016
Gerst Diane G. EVP, QA & Regulatory Affairs Sale 24,046 $19.28 $463,607 28,985 Aug 19, 2016
PRINS RICHARD K Sale 3,086 $19.62 $60,547 26,000 Aug 18, 2016
Shandell Jason B. President and General Counsel Sale 5,987 $18.86 $112,915 202,961 Aug 17, 2016
Shohet Stephen B. Sale 14,788 $18.12 $267,959 18,272 Aug 16, 2016
ZASLOFF MICHAEL A Option Exercise 10,381 $15.23 $158,103 42,792 Aug 15, 2016
PETERS WILLIAM J CFO, SVP & Treasurer Sale 1,027 $18.19 $18,681 63,625 Aug 12, 2016
PRINS RICHARD K Option Exercise 2,595 $15.23 $39,522 31,681 Aug 11, 2016
Shandell Jason B. President Sale 5,636 $18.01 $101,504 208,948 Aug 11, 2016
PETERS WILLIAM J CFO, SVP & Treasurer Sale 2,297 $17.76 $40,795 64,652 Jul 18, 2016
Shandell Jason B. President and General Counsel Tax Withholding 3,394 $16.33 $55,424 214,584 Jul 5, 2016
Gerst Diane G. EVP, QA & Regulatory Affairs Tax Withholding 146 $15.76 $2,301 28,985 Jun 15, 2016
Zhou Rong EVP, Production Center Sale 1,551 $15.85 $24,583 37,137 Jun 15, 2016
PRINS RICHARD K Award / Grant 6,086 29,086 Jun 13, 2016
Shandell Jason B. President Sale 9,904 $16.43 $162,723 216,610 Jun 9, 2016
Koo Richard Award / Grant 6,086 229,494 Jun 9, 2016
Lee Howard Award / Grant 6,086 114,527 Jun 9, 2016
Petersen Floyd F. Award / Grant 6,086 63,317 Jun 9, 2016
ZASLOFF MICHAEL A Award / Grant 6,086 32,411 Jun 9, 2016
Shohet Stephen B. Award / Grant 6,086 18,272 Jun 9, 2016
PETERS WILLIAM J CFO, SVP & Treasurer Sale 2,297 $16.00 $36,752 66,949 Jun 2, 2016
Lee Howard Tax Withholding 1,460 $15.75 $22,995 108,441 May 27, 2016
Shandell Jason B. President Sale 1,074 $15.60 $16,754 226,514 May 25, 2016
Gerst Diane G. EVP, QA & Regulatory Affairs Sale 1,427 $13.97 $19,935 28,649 May 18, 2016
PRINS RICHARD K Sale 3,200 $13.56 $43,392 23,000 May 17, 2016
PETERS WILLIAM J CFO, SVP & Treasurer Tax Withholding 1,383 $13.05 $18,048 69,246 Apr 21, 2016
Gerst Diane G. EVP, QA & Regulatory Affairs Option Exercise 5,607 $10.48 $58,761 35,683 Apr 18, 2016
Gerst Diane G. EVP, QA & Regulatory Affairs Tax Withholding 741 $12.66 $9,381 31,503 Apr 14, 2016
Zhang Jack Y. CEO & Chief Science Officer Tax Withholding 8,641 $11.96 $103,346 752,321 Mar 27, 2016
Shandell Jason B. President Tax Withholding 4,714 $11.96 $56,379 233,526 Mar 27, 2016
Zhou Rong EVP, Production Tax Withholding 568 $11.96 $6,793 37,137 Mar 26, 2016
PETERS WILLIAM J CFO, SVP & Treasurer Tax Withholding 1,823 $11.96 $21,803 70,629 Mar 26, 2016
Gerst Diane G. EVP, QA & Regulatory Affairs Tax Withholding 614 $11.96 $7,343 32,244 Mar 26, 2016
PRINS RICHARD K Sale 2,400 $11.25 $27,000 26,200 Mar 17, 2016
Gerst Diane G. EVP, QA & Regulatory Affairs Award / Grant 11,253 32,858 Mar 17, 2016
Zhou Rong EVP, Production Award / Grant 11,473 37,705 Mar 17, 2016
PETERS WILLIAM J CFO, SVP & Treasurer Award / Grant 39,717 72,452 Mar 17, 2016
Shandell Jason B. President Award / Grant 75,022 238,240 Mar 17, 2016
Zhang Jack Y. CEO & Chief Science Officer Award / Grant 184,466 1,129,902 Mar 17, 2016
ZASLOFF MICHAEL A Sale 16,538 $14.19 $234,674 26,325 Dec 16, 2015