Insider trading · Q3 2026 · CIK 1297184

Amphastar Pharmaceuticals, Inc. (AMPH) insider trading.

Name: Amphastar Pharmaceuticals, Inc. insider transactions, Q3 2026
Creator: U.S. Securities and Exchange Commission

In Q3 2026, insiders at Amphastar Pharmaceuticals, Inc. reported 8 non-derivative transactions on 7 Forms 3, 4 and 5: 0 open-market purchases and 5 sales worth $764K.

Transactions: 8
Purchases (P): 0
Sales (S): 5
Net shares, P minus S: -33,479
Insiders: 4
Last filed: 2026-09-23

Insiders

Insider	Relationship	Transactions	Sales
Peters William J	Director, Officer · CFO, EVP & TREASURER	3	2
Zhou Rong	Officer · SENIOR EVP, PRODUCTION CENTER	3	2
Prins Richard K	Director	1	1
Pierce Anthony T	Director	1	0

Transactions

8 non-derivative rows, newest transaction first. Shares and prices as filed.
Date	Insider	Code	Shares	Price	Owned after	Filing
2026-09-21	Peters William J	S (D)	4,139	$25	168,707	Form 4
2026-09-16	Zhou Rong	S (D)	10,000	$23.94	169,203	Form 4
2026-09-16	Zhou Rong	M (A)	10,000	$13.35	179,203	Form 4
2026-09-02	Zhou Rong	S (D)	3,187	$23.63	169,203	Form 4
2026-08-11	Prins Richard K	S (D)	7,973	$20.3	29,625	Form 4
2026-08-07	Peters William J	M (A)	5,053	$19.79	181,026	Form 4
2026-08-07	Peters William J	S (D)	8,180	$22.48	172,846	Form 4
2026-07-09	Pierce Anthony T	A (A)	7,886	$0	7,886	Form 4

Transaction codes in this quarter

S: 5 M: 2 A: 1

Get AMPH insider transactions through the API

Request with your API key

curl "https://sec-api.dev/api/v1/insider-transactions?period=2026q3&cik=1297184&limit=100" \
  -H "Authorization: Bearer $SEC_API_KEY"

Insider trading API guide · AMPH company page · Amphastar Pharmaceuticals, Inc. on SEC.gov

Questions

Are insiders buying or selling Amphastar Pharmaceuticals, Inc. (AMPH)?

In Q3 2026, insiders at Amphastar Pharmaceuticals, Inc. reported 8 non-derivative transactions on 7 Forms 3, 4 and 5: 0 open-market purchases and 5 sales worth $764K. Grants, tax withholding and option exercises are counted as transactions but are not purchases or sales.

Where do these Amphastar Pharmaceuticals, Inc. insider trades come from?

From the SEC Insider Transactions Data Sets for Q3 2026, which republish the Forms 3, 4 and 5 filed on EDGAR. Each row links to its filing on SEC.gov.

Source: SEC Insider Transactions Data Sets, Q3 2026, retrieved 2026-10-27. Footnotes, derivative holdings and amendments are in the linked filings. Not investment advice.

Plain-text version for agents and LLMs: /insider-trading/amph.md

Independent. Not affiliated with, endorsed by, or sponsored by the U.S. Securities and Exchange Commission. Data is reproduced from public SEC filings and datasets. Not investment advice.