Gift or transfer — classified separately from trades.
Written from the filing's own figures. OQRO describes what was reported and never tells you what to buy or sell
View the official recordSEC Form 4 — Statement of Changes in Beneficial OwnershipAll the details
Dates, kept separate
Transaction date
Aug 19, 2024
Reporting period
Not applicable
Filed with the SEC
Jun 4, 2026
DirectorGift / transfer
Context
Classification
gift transfer
Code G — gift, bequest or transfer
Planned / mechanical clue
None found in footnotes
Only flagged when a footnote says so; never inferred
Source receipt
Record ID
0001047579-26-000003
Filed / recorded
Jun 4, 2026, 1:22 AM UTC
Added to OQRO
Oct 6, 2026, 9:54 PM UTC
Parser
form4-xml-v2
Data quality
Verified: identifiers matched exactly
Issuer
Amphastar Pharmaceuticals, Inc.
Issuer CIK
1297184
Ticker
AMPH
Reporting person
Richard K Prins
Relationship
Director
Security
Common Stock
Table
Non-derivative (Table I)
Transaction date
Aug 19, 2024
Transaction code
G
Shares / units
1,500
Price per share
$0.00
Acquired / disposed
Disposed (D)
Shares owned after
29,455
Ownership form
Direct
Amendment
No
Footnotes from the filing
The number of shares beneficially owned following the reported transaction is as of June 1, 2026 and has been reduced by 4,228 shares to reflect a reconciliation to the reporting person's account records.