Richard K. Prins
CIK: 0001047579
Transaction Breakdown
High conviction signal
Position reduction
Derivative conversions
Compensation grants
Gifts, tax withholding, conversions, dispositions to the issuer and other codes
Discretionary Trading P&L
Holdings
Transaction History (19 total)
- Aug 11, 2026AMPH
Amphastar Pharmaceuticals, Inc.
Sale(S)Direct8K shares at avg. $20.30$162K - Jun 1, 2026AMPH
Amphastar Pharmaceuticals, Inc.
Award(A)Direct8.1K shares- - Apr 1, 2026IGC
IGC Pharma, Inc.
Exercise(M)Direct100K shares- - Apr 1, 2026IGC
IGC Pharma, Inc.
Exercise(M)Direct70K shares- - Jan 19, 2026IGC
IGC Pharma, Inc.
Exercise(M)Direct100K shares- - Nov 25, 2025AMPH
Amphastar Pharmaceuticals, Inc.
Sale(S)Direct4.2K shares at avg. $27.10$113K - Nov 25, 2025AMPH
Amphastar Pharmaceuticals, Inc.
Exercise(M)Direct4.2K shares at avg. $16.69$70K - Oct 17, 2025IGC
IGC Pharma, Inc.
Award(A)DirectOptions
750K shares- - Jun 2, 2025AMPH
Amphastar Pharmaceuticals, Inc.
Award(A)Direct5.1K shares- - Mar 31, 2025IGC
IGC Pharma, Inc.
Exercise(M)Direct58.3K shares- - Mar 31, 2025IGC
IGC Pharma, Inc.
Exercise(M)Direct100K shares- - Mar 31, 2025IGC
IGC Pharma, Inc.
Exercise(M)Direct70K shares- - Dec 9, 2024AMPH
Amphastar Pharmaceuticals, Inc.
Gift(G)Direct410 shares- - Dec 9, 2024AMPH
Amphastar Pharmaceuticals, Inc.
Exercise(M)Direct10K shares at avg. $19.52$195K - Dec 9, 2024AMPH
Amphastar Pharmaceuticals, Inc.
Sale(S)Direct10K shares at avg. $43.77$438K - Nov 12, 2024AMPH
Amphastar Pharmaceuticals, Inc.
Exercise(M)Direct2.5K shares at avg. $16.69$42K - Nov 12, 2024AMPH
Amphastar Pharmaceuticals, Inc.
Gift(G)Direct1K shares- - Nov 12, 2024AMPH
Amphastar Pharmaceuticals, Inc.
Sale(S)Direct5K shares at avg. $48.80$244K - Aug 19, 2024AMPH
Amphastar Pharmaceuticals, Inc.
Gift(G)Direct1.5K shares-
| Type | Shares | Price | Ownership | |||
|---|---|---|---|---|---|---|
| Aug 11, 2026 |  AMPH Amphastar Pharmaceuticals, Inc. | Sale(S) | 7,973 | $20.30 | $161,852 | Direct |
| Jun 1, 2026 | AMPH Amphastar Pharmaceuticals, Inc. | Award(A) | 8,143 | - | $0 | Direct |
| Apr 1, 2026 |  IGC IGC Pharma, Inc. | Exercise(M) | 100,000 | - | $0 | Direct |
| Apr 1, 2026 | IGC IGC Pharma, Inc. | Exercise(M) | 70,000 | - | $0 | Direct |
| Jan 19, 2026 | IGC IGC Pharma, Inc. | Exercise(M) | 100,000 | - | $0 | Direct |
| Nov 25, 2025 | AMPH Amphastar Pharmaceuticals, Inc. | Sale(S) | 4,179 | $27.10 | $113,253 | Direct |
| Nov 25, 2025 | AMPH Amphastar Pharmaceuticals, Inc. | Exercise(M) | 4,179 | $16.69 | $69,748 | Direct |
| Oct 17, 2025 | IGC IGC Pharma, Inc. | Award(A) Options | 750,000 | - | - | Direct |
| Jun 2, 2025 | AMPH Amphastar Pharmaceuticals, Inc. | Award(A) | 5,122 | - | - | Direct |
| Mar 31, 2025 | IGC IGC Pharma, Inc. | Exercise(M) | 58,333 | - | - | Direct |
| Mar 31, 2025 | IGC IGC Pharma, Inc. | Exercise(M) | 100,000 | - | - | Direct |
| Mar 31, 2025 | IGC IGC Pharma, Inc. | Exercise(M) | 70,000 | - | - | Direct |
| Dec 9, 2024 | AMPH Amphastar Pharmaceuticals, Inc. | Gift(G) | 410 | - | $0 | Direct |
| Dec 9, 2024 | AMPH Amphastar Pharmaceuticals, Inc. | Exercise(M) | 10,000 | $19.52 | $195,200 | Direct |
| Dec 9, 2024 | AMPH Amphastar Pharmaceuticals, Inc. | Sale(S) | 10,000 | $43.77 | $437,702 | Direct |
| Nov 12, 2024 | AMPH Amphastar Pharmaceuticals, Inc. | Exercise(M) | 2,500 | $16.69 | $41,725 | Direct |
| Nov 12, 2024 | AMPH Amphastar Pharmaceuticals, Inc. | Gift(G) | 1,000 | - | $0 | Direct |
| Nov 12, 2024 | AMPH Amphastar Pharmaceuticals, Inc. | Sale(S) | 5,000 | $48.80 | $243,986 | Direct |
| Aug 19, 2024 | AMPH Amphastar Pharmaceuticals, Inc. | Gift(G) | 1,500 | - | $0 | Direct |
1-19 of 19 transactions
About PRINS RICHARD K
PRINS RICHARD K (SEC CIK 0001047579) files insider reports with the SEC as Director of Amphastar Pharmaceuticals, Inc. (AMPH) and Director of IGC Pharma, Inc. (IGC).
Signal8 holds 10 ownership filings by PRINS RICHARD K (9 Form 4, 1 Form 5), filed between Nov 13, 2024 and Aug 12, 2026. Those filings report 19 transactions, from Aug 19, 2024 to Aug 11, 2026. Signal8's Form 4 history starts in Sep 2024.
The business address on PRINS RICHARD K's filings is in RANCHO CUCAMONGA, CA.
Recent filings by PRINS RICHARD K
- Aug 11, 2026: Open-market sale of AMPH shares (Form 4, code S).
- Jun 1, 2026: Grant or award of AMPH shares (Form 4, code A).
- Apr 1, 2026: Option exercises of IGC shares (2 lines, Form 4, code M).
- Jan 19, 2026: Option exercise of IGC shares (Form 4, code M).
- Nov 25, 2025: Open-market sale of AMPH shares (Form 4, code S).
Other insiders filing for Amphastar Pharmaceuticals, Inc. (AMPH)
- PETERS WILLIAM J, CFO, EVP & TREASURER
- Zhou Rong, SENIOR EVP, PRODUCTION CENTER
- Pierce Anthony T, Director
- Lee Howard, Director
- ZASLOFF MICHAEL A, Director
- Gerst Diane G., Director