Insider · CIK 0001047579
Richard K Prins
Files at AMPH (Amphastar Pharmaceuticals, Inc.), IGC (IGC Pharma, Inc.). First filing Nov 13, 2024, latest Nov 25, 2025.
Richard K Prins files SEC Form 4 as director at AMPH (Amphastar Pharmaceuticals, Inc.), and also at IGC (IGC Pharma, Inc.). Since Nov 13, 2024, Richard K Prins has reported 0 open-market buys worth $0 and 3 open-market sells worth $795k, the latest filed on Nov 25, 2025.
A track record needs three past buys with six months of prices behind them; Richard K Prins has 0, so none is measured yet.
The newest scored trade: sold $113k of AMPH on Nov 25, 2025, filed Nov 25, 2025, scored 23 (weak). In the last 12 months: 0 buys worth $0 and 1 sell worth $113k.
Where the trades landed
Last year at the company this insider has traded most, with each buy and sell on the bar it happened.
AMPH: Amphastar Pharmaceuticals, Inc.
Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value. Click a marked bar to open the signal.Charts by TradingView Lightweight Charts™
Signals
This insider’s open-market buys and sells, scored.
| Score | Company | Value | Holdings | Price context | Filed |
|---|---|---|---|---|---|
| 23Weak | Amphastar Pharmaceuticals, Inc. | $113k 4,179 shares | -11% | +34% from low-40% from high | |
| 30Weak | Amphastar Pharmaceuticals, Inc. | $438k 10,000 shares | -25% | - | |
| 33Weak | Amphastar Pharmaceuticals, Inc. | $244k 5,000 shares | -14% | - |
Planned sales
Form 144 notices this insider filed before selling restricted or control stock, newest first.
| Filed | Company | Shares | Value | Sale date | Past 3 months |
|---|---|---|---|---|---|
| Nov 25, 2025 | AMPH Amphastar Pharmaceuticals, Inc. | 4,179 0.01% of outstanding | $104k | Nov 25, 2025 | none |
| Dec 9, 2024 | AMPH Amphastar Pharmaceuticals, Inc. | 10,000 0.02% of outstanding | $440k | Dec 9, 2024 | $244k |
| Nov 12, 2024 | AMPH Amphastar Pharmaceuticals, Inc | 5,000 0.01% of outstanding | $241k | Nov 12, 2024 | none |
Transactions
Every row this insider has filed, 19 in all, newest first.
| Date | Company | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|---|
| Aug 19, 2024 | AMPH Amphastar Pharmaceuticals, Inc. | GGift Common Stock | -1,500 | $0.00 | $0 | 29,455 | Jun 3, 2026 |
| Jun 1, 2026 | AMPH Amphastar Pharmaceuticals, Inc. | AGrant or award Common Stock | +8,143 | $0.00 | $0 | 37,598 | Jun 3, 2026 |
| Jun 1, 2026 | AMPH Amphastar Pharmaceuticals, Inc. | AGrant or award Stock Option (right to buy)derivative | +17,365 | $0.00 | $0 | 17,365 | Jun 3, 2026 |
| Jan 19, 2026 | IGC IGC Pharma, Inc. | MOption exercise Common Stock | +100,000 | $0.00 | $0 | 1,371,251 | Jan 20, 2026 |
| Jan 19, 2026 | IGC IGC Pharma, Inc. | MOption exercise Restricted Stock Unitsderivative | -100,000 | $0.00 | $0 | 50,000 | Jan 20, 2026 |
| Nov 25, 2025 | AMPH Amphastar Pharmaceuticals, Inc. | MOption exercise Common Stock | +4,179 | $16.69 | $70k | 39,362 | Nov 25, 2025 |
| Nov 25, 2025 | AMPH Amphastar Pharmaceuticals, Inc. | SOpen-market sale Common Stock | -4,179 | $27.10 | $113k | 35,183 | Nov 25, 2025 |
| Nov 25, 2025 | AMPH Amphastar Pharmaceuticals, Inc. | MOption exercise Stock Option (right to buy)derivative | -4,179 | $0.00 | $0 | 0 | Nov 25, 2025 |
| Oct 17, 2025 | IGC IGC Pharma, Inc. | AGrant or award Optionsderivative | +750,000 | $0.00 | $0 | 750,000 | Oct 22, 2025 |
| Jun 2, 2025 | AMPH Amphastar Pharmaceuticals, Inc. | AGrant or award Common Stock | +5,122 | $0.00 | $0 | 35,183 | Jun 4, 2025 |
| Jun 2, 2025 | AMPH Amphastar Pharmaceuticals, Inc. | AGrant or award Stock Option (right to buy)derivative | +11,402 | $0.00 | $0 | 11,402 | Jun 4, 2025 |
| Dec 9, 2024 | AMPH Amphastar Pharmaceuticals, Inc. | MOption exercise Common Stock | +10,000 | $19.52 | $195k | 40,471 | Dec 11, 2024 |
| Dec 9, 2024 | AMPH Amphastar Pharmaceuticals, Inc. | SOpen-market sale Common Stock | -10,000 | $43.77 | $438k | 30,471 | Dec 11, 2024 |
| Dec 9, 2024 | AMPH Amphastar Pharmaceuticals, Inc. | GGift Common Stock | -410 | $0.00 | $0 | 30,061 | Dec 11, 2024 |
| Dec 9, 2024 | AMPH Amphastar Pharmaceuticals, Inc. | MOption exercise Stock Option (right to buy)derivative | -10,000 | $0.00 | $0 | 0 | Dec 11, 2024 |
| Nov 12, 2024 | AMPH Amphastar Pharmaceuticals, Inc. | MOption exercise Common Stock | +2,500 | $16.69 | $42k | 36,471 | Nov 13, 2024 |
| Nov 12, 2024 | AMPH Amphastar Pharmaceuticals, Inc. | SOpen-market sale Common Stock | -5,000 | $48.80 | $244k | 31,471 | Nov 13, 2024 |
| Nov 12, 2024 | AMPH Amphastar Pharmaceuticals, Inc. | GGift Common Stock | -1,000 | $0.00 | $0 | 30,471 | Nov 13, 2024 |
| Nov 12, 2024 | AMPH Amphastar Pharmaceuticals, Inc. | MOption exercise Stock Option (right to buy)derivative | -2,500 | $0.00 | $0 | 4,179 | Nov 13, 2024 |
Questions about Richard K Prins
Answered from the filings on this page, as of the latest one.
Is Richard K Prins buying or selling?
In the last 12 months Richard K Prins reported 0 open-market buys worth $0 and 1 open-market sell worth $113k on SEC Form 4; the latest was sold $113k of AMPH on Nov 25, 2025. Grants, option exercises and tax withholding are not counted.
How did Richard K Prins's past buys perform?
Not measured yet. InsiderTell needs three past buys with six months of prices to publish a track record, and Richard K Prins has 0.
Where does Richard K Prins file Form 4?
Richard K Prins has filed Form 4 at AMPH (Amphastar Pharmaceuticals, Inc.); IGC (IGC Pharma, Inc.). A Form 4 is required of officers, directors and holders of more than 10% of a share class within two business days of a trade.
Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.