Significant Ownership of Jack Y. Zhang

Large-stake snapshot 1 signal
Large-stake filing summary
  • Recent SEC Schedule 13D/G filings for Jack Y. Zhang focus on large-stake beneficial ownership disclosures and amendments.
  • Use this view to spot new large holders, amended positions, and activist-style ownership evidence.
Manager Names, identifiers, and filing context for this profile. 1 identity field
Manager location
Rancho Cucamonga, CA

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Significant Ownership of Jack Y. Zhang

Sym Company Class Ownership Holdings Value Net Change Nb Shares Change % Reporting Name Report Period
AMPH Amphastar Pharmaceuticals, Inc. Common Stock 25% $301,456,363 12,524,153 Jack Y. Zhang 31 Dec 2024

Schedules 13D/G Reported by Jack Y. Zhang:

Sym Target Class Ownership Change Current shares Change Value Reporting name Form Report period Filing date
Schedule rows are parsed from SEC 13D/G filings. Open the linked filing or target page to verify the reported ownership and shares.
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