Insider · CIK 0001611286
Floyd F. Petersen
Files at AMPH (Amphastar Pharmaceuticals, Inc.). First filing Mar 7, 2025, latest Dec 15, 2025.
Floyd F. Petersen files SEC Form 4 as director at AMPH (Amphastar Pharmaceuticals, Inc.). Since Mar 7, 2025, Floyd F. Petersen has reported 0 open-market buys worth $0 and 11 open-market sells worth $680k, the latest filed on Dec 15, 2025.
A track record needs three past buys with six months of prices behind them; Floyd F. Petersen has 0, so none is measured yet.
The newest scored trade: sold $108k of AMPH on Dec 11, 2025, filed Dec 15, 2025, scored 33 (weak). In the last 12 months: 0 buys worth $0 and 3 sells worth $562k.
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 |
|---|---|---|---|---|---|
| 33Weak | Amphastar Pharmaceuticals, Inc. | $108k 4,163 shares | -6% | +26% from low-42% from high | |
| 30Weak | Amphastar Pharmaceuticals, Inc. | $442k 16,679 shares | -18% | +28% from low-43% from high | |
| 0Weak | Amphastar Pharmaceuticals, Inc. | $13k 500 shares | -1% | +23% from low-53% from high | |
| 0Weak | Amphastar Pharmaceuticals, Inc. | $14k 500 shares | -1% | +31% from low-49% from high | |
| 0Weak | Amphastar Pharmaceuticals, Inc. | $15k 500 shares | -1% | +49% from low-42% from high | |
| 0Weak | Amphastar Pharmaceuticals, Inc. | $10k 500 shares | -1% | +3% from low-60% from high | |
| 0Weak | Amphastar Pharmaceuticals, Inc. | $12k 500 shares | -1% | +3% from low-56% from high | |
| 0Weak | Amphastar Pharmaceuticals, Inc. | $13k 500 shares | -1% | +10% from low-52% from high | |
| 0Weak | Amphastar Pharmaceuticals, Inc. | $12k 500 shares | -1% | +4% from low-55% from high | |
| 0Weak | Amphastar Pharmaceuticals, Inc. | $14k 500 shares | -1% | +8% from low-47% from high | |
| 8Weak | Amphastar Pharmaceuticals, Inc. | $28k 1,000 shares | -1% | +3% from low-47% from high |
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 |
|---|---|---|---|---|---|
| Dec 11, 2025 | AMPH Amphastar Pharmaceuticals, Inc. | 4,163 0.01% of outstanding | $333k | Dec 11, 2025 | $513k |
| Dec 10, 2025 | AMPH Amphastar Pharmaceuticals, Inc. | 1,737 0.00% of outstanding | $43k | Dec 10, 2025 | $438k |
| Nov 13, 2025 | AMPH Amphastar Pharmaceuticals, Inc. | 16,679 0.04% of outstanding | $442k | Nov 13, 2025 | $42k |
| Nov 3, 2025 | AMPH Amphastar Pharmaceuticals, Inc. | 500 0.00% of outstanding | $13k | Nov 3, 2025 | $41k |
| Oct 1, 2025 | AMPH Amphastar Pharmaceuticals, Inc. | 500 0.00% of outstanding | $13k | Oct 1, 2025 | $38k |
| Sep 2, 2025 | AMPH Amphastar Pharmaceuticals, Inc. | 500 0.00% of outstanding | $15k | Sep 2, 2025 | $35k |
| Aug 1, 2025 | AMPH Amphastar Pharmaceuticals, Inc. | 500 0.00% of outstanding | $10k | Aug 1, 2025 | $37k |
| Jul 2, 2025 | AMPH Amphastar Pharmaceuticals, Inc. | 500 0.00% of outstanding | $12k | Jul 2, 2025 | $67k |
| Jun 2, 2025 | AMPH Amphastar Pharmaceuticals, Inc. | 500 0.00% of outstanding | $13k | Jun 2, 2025 | $54k |
| May 1, 2025 | AMPH Amphastar Pharmaceuticals, Inc. | 500 0.00% of outstanding | $12k | May 1, 2025 | $42k |
| Apr 1, 2025 | AMPH Amphastar Pharmaceuticals, Inc. | 500 0.00% of outstanding | $14k | Apr 1, 2025 | $28k |
| Mar 6, 2025 | AMPH Amphastar Pharmaceuticals, Inc. | 1,000 0.00% of outstanding | $28k | Mar 6, 2025 | none |
Transactions
Every row this insider has filed, 16 in all, newest first.
| Date | Company | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|---|
| Dec 11, 2025 | AMPH Amphastar Pharmaceuticals, Inc. | SOpen-market sale Common Stock | -1,737 | $25.69 | $45k | 73,794 | Dec 15, 2025 |
| Dec 12, 2025 | AMPH Amphastar Pharmaceuticals, Inc. | SOpen-market sale Common Stock | -2,426 | $25.92 | $63k | 71,368 | Dec 15, 2025 |
| Nov 13, 2025 | AMPH Amphastar Pharmaceuticals, Inc. | MOption exercise Common Stock | +16,679 | $16.69 | $278k | 92,210 | Nov 17, 2025 |
| Nov 13, 2025 | AMPH Amphastar Pharmaceuticals, Inc. | SOpen-market sale Common Stock | -16,679 | $26.49 | $442k | 75,531 | Nov 17, 2025 |
| Nov 13, 2025 | AMPH Amphastar Pharmaceuticals, Inc. | MOption exercise Stock Option (right to buy)derivative | -16,679 | $0.00 | $0 | 0 | Nov 17, 2025 |
| Nov 3, 2025 | AMPH Amphastar Pharmaceuticals, Inc. | SOpen-market sale Common Stock10b5-1 | -500 | $25.27 | $13k | 75,531 | Nov 5, 2025 |
| Oct 1, 2025 | AMPH Amphastar Pharmaceuticals, Inc. | SOpen-market sale Common Stock10b5-1 | -500 | $27.20 | $14k | 76,031 | Oct 2, 2025 |
| Sep 2, 2025 | AMPH Amphastar Pharmaceuticals, Inc. | SOpen-market sale Common Stock10b5-1 | -500 | $30.98 | $15k | 76,531 | Sep 3, 2025 |
| Aug 1, 2025 | AMPH Amphastar Pharmaceuticals, Inc. | SOpen-market sale Common Stock10b5-1 | -500 | $20.83 | $10k | 77,031 | Aug 4, 2025 |
| Jul 2, 2025 | AMPH Amphastar Pharmaceuticals, Inc. | SOpen-market sale Common Stock10b5-1 | -500 | $23.47 | $12k | 77,531 | Jul 3, 2025 |
| Jun 2, 2025 | AMPH Amphastar Pharmaceuticals, Inc. | SOpen-market sale Common Stock10b5-1 | -500 | $25.67 | $13k | 72,909 | Jun 4, 2025 |
| Jun 2, 2025 | AMPH Amphastar Pharmaceuticals, Inc. | AGrant or award Common Stock10b5-1 | +5,122 | $0.00 | $0 | 78,031 | Jun 4, 2025 |
| Jun 2, 2025 | AMPH Amphastar Pharmaceuticals, Inc. | AGrant or award Stock Option (right to buy)derivative10b5-1 | +11,402 | $0.00 | $0 | 11,402 | Jun 4, 2025 |
| May 1, 2025 | AMPH Amphastar Pharmaceuticals, Inc. | SOpen-market sale Common Stock10b5-1 | -500 | $24.08 | $12k | 73,409 | May 2, 2025 |
| Apr 1, 2025 | AMPH Amphastar Pharmaceuticals, Inc. | SOpen-market sale Common Stock10b5-1 | -500 | $28.38 | $14k | 73,909 | Apr 2, 2025 |
| Mar 6, 2025 | AMPH Amphastar Pharmaceuticals, Inc. | SOpen-market sale Common Stock10b5-1 | -1,000 | $27.99 | $28k | 74,409 | Mar 7, 2025 |
Questions about Floyd F. Petersen
Answered from the filings on this page, as of the latest one.
Is Floyd F. Petersen buying or selling?
In the last 12 months Floyd F. Petersen reported 0 open-market buys worth $0 and 3 open-market sells worth $562k on SEC Form 4; the latest was sold $108k of AMPH on Dec 11, 2025. Grants, option exercises and tax withholding are not counted.
How did Floyd F. Petersen's past buys perform?
Not measured yet. InsiderTell needs three past buys with six months of prices to publish a track record, and Floyd F. Petersen has 0.
Where does Floyd F. Petersen file Form 4?
Floyd F. Petersen has filed Form 4 at AMPH (Amphastar Pharmaceuticals, 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.