Amphastar Pharmaceuticals, Inc. (AMPH)

Nasdaq · Pharmaceutical Preparations

What they're doing

Between 2026-06-21 and 2026-09-19, public records show 1 signal for Amphastar Pharmaceuticals, Inc.. Most notable: 2026-07-13: Filed 8-K disclosing director or officer change. Federal contract obligations over the last 24 months total $0. This summary was assembled automatically from SEC EDGAR, USAspending.gov, U.S. Senate lobbying disclosures and Wikimedia pageview counts.

Generated 2026-09-19 from public records.

Signals, last 12 months

  1. Material 8-K filing
    Filed 8-K disclosing director or officer change
  2. Material 8-K filing
    Filed 8-K disclosing director or officer change
  3. Material 8-K filing
    Filed 8-K disclosing material agreement
  4. Material 8-K filing
    Filed 8-K disclosing material agreement
  5. Material 8-K filing
    Filed 8-K disclosing material agreement

Insider transactions

DateInsiderRoleCodeSharesPriceValue
2026-09-16Zhou RongofficerS10,00023.94$239,404
2026-09-16Zhou RongofficerM10,00013.35$133,500
2026-09-02Zhou RongofficerS3,18723.63$75,306
2026-08-11PRINS RICHARD KdirectorS7,97320.3$161,852
2026-08-07PETERS WILLIAM JdirectorM5,05319.79$99,999
2026-08-07PETERS WILLIAM JdirectorS8,18022.48$183,886
2026-07-09Pierce Anthony TdirectorA7,8860$0
2026-06-02Lee HowarddirectorF76918.45$14,188
2026-06-02Lee HowarddirectorF76918.45$14,188
2026-06-01PRINS RICHARD KdirectorA8,1430$0
2026-06-01Lee HowarddirectorA8,1430$0
2026-06-01ZASLOFF MICHAEL AdirectorA8,1430$0
2026-06-01Gerst Diane G.directorA8,1430$0
2026-06-01Gaugh David RusselldirectorA8,1430$0
2026-06-01Deflin GayledirectorA8,1430$0
2026-06-01PRINS RICHARD KdirectorA8,1430$0
2026-06-01Lee HowarddirectorA8,1430$0
2026-06-01ZASLOFF MICHAEL AdirectorA8,1430$0
2026-06-01Gerst Diane G.directorA8,1430$0
2026-06-01Gaugh David RusselldirectorA8,1430$0
2026-06-01Deflin GayledirectorA8,1430$0
2026-03-15Liawatidewi YakobdirectorF1,03318.18$18,780
2026-03-15Zhou RongofficerF1,22518.18$22,271
2026-03-15PETERS WILLIAM JdirectorF1,97318.18$35,869
2026-03-15Zhang Jack Y.directorF9,78418.18$177,873
2026-03-15Zhang Jack Y.directorF2,90818.18$52,867
2026-03-15Liawatidewi YakobdirectorF1,03318.18$18,780
2026-03-15Zhou RongofficerF1,22518.18$22,271
2026-03-15PETERS WILLIAM JdirectorF1,97318.18$35,869
2026-03-15Zhang Jack Y.; Luo Mary Z.directorF9,78418.18$177,873
2026-03-15Zhang Jack Y.; Luo Mary Z.directorF2,90818.18$52,867
2026-03-10PETERS WILLIAM JdirectorF3,29718.91$62,346
2026-03-10Zhou RongofficerF2,21518.91$41,886
2026-03-10Liawatidewi YakobdirectorF1,87018.91$35,362
2026-03-10Zhang Jack Y.directorF4,39518.91$83,109
2026-03-10Zhang Jack Y.directorF14,78518.91$279,584
2026-03-10PETERS WILLIAM JdirectorF3,29718.91$62,346
2026-03-10Zhou RongofficerF2,21518.91$41,886
2026-03-10Liawatidewi YakobdirectorF1,87018.91$35,362
2026-03-10Zhang Jack Y.; Luo Mary Z.directorF14,78518.91$279,584
2026-03-10Zhang Jack Y.; Luo Mary Z.directorF4,39518.91$83,109
2026-03-09PETERS WILLIAM JdirectorA58,6930$0
2026-03-09Zhou RongofficerA39,4320$0
2026-03-09Liawatidewi YakobdirectorA35,4500$0
2026-03-09Zhang Jack Y.directorA180,5040$0
2026-03-09Zhang Jack Y.directorA72,4620$0
2026-03-09PETERS WILLIAM JdirectorA58,6930$0
2026-03-09Zhou RongofficerA39,4320$0
2026-03-09Liawatidewi YakobdirectorA35,4500$0
2026-03-09Zhang Jack Y.; Luo Mary Z.directorA180,5040$0

Federal contracts

No federal contract actions on record for this recipient mapping.

Lobbying

No federal lobbying filings on record for this client mapping.

Public attention

No Wikipedia pageview data linked to this company.

Recent filings

  • 2026-09-21 144
  • 2026-09-17 4
  • 2026-09-03 4
  • 2026-09-01 144
  • 2026-08-18 144
  • 2026-08-12 4
  • 2026-08-11 4
  • 2026-08-11 144
  • 2026-08-07 144
  • 2026-08-06 10-Q
  • 2026-08-06 8-K
  • 2026-07-14 SCHEDULE 13G
  • 2026-07-13 4
  • 2026-07-13 3
  • 2026-07-13 8-K
  • 2026-07-08 8-K
  • 2026-06-03 4
  • 2026-06-03 4
  • 2026-06-03 4
  • 2026-06-03 4