PETERS WILLIAM J
CFO, EVP & TREASURER
Sale 10b5-1
- Shares
- 4,139
- Price
- $25.00
- Value
- $103,475
SEC EDGAR · Forms 3/4/5Updated through Oct 30, 2026•37 filings
AMPH
Amphastar Pharmaceuticals, Inc.
Net sales of $763.9K over the last 3 months
3 sellers account for the net balance. There is no cluster of three distinct buyers within 30 days. We found no CEO/CFO purchases over 12 months.
How to read this signal
Only open-market P purchases and S sales count toward the signal. Vesting, options, taxes and gifts remain in the source data but do not trigger alerts. Rule 10b5-1 trades are shown as informational.
3-month balance
−$763,923
0 buyers · 3 sellers
12-month purchases
$0.00
0 distinct insiders
12-month sales
$1,695,534
4 distinct insiders
Highlighted alerts
8
6 Rule 10b5-1 trades treated as informational
Buying cluster · 30 days
Fewer than three distinct buyers
CEO/CFO purchases · 12 months
No executive purchases found
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Form 4 raw → Raspberry
The value is in what we do not call a signal.
The SEC XML stores every transaction. Raspberry keeps that evidence, reads the footnotes and separates voluntary open-market activity from vesting, option exercises, gifts, tax withholding, stock purchase and dividend reinvestment plans and pre-programmed 10b5-1 trades.
70
Raw transactions
Everything returned by the filing
14
Voluntary view
P/S trades after deterministic checks
56
Administrative noise
Stored, never alerted
8
10b5-1
Shown as informational
SEC ownership XML facts
- Code
- M
- Shares
- 10,000
- Price
- $13.35
- Footnotes
- 4
The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $23.83 to $24.05, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price. The shares are held of record by the Zhou Family Trust for which the reporting person serves as a trustee. The shares are held of record by the reporting person's spouse. Shares subject to the option are fully vested and immediately exercisable.
Recent transactions
Voluntary purchases and sales; administrative noise stays hidden.
Zhou Rong
SENIOR EVP, PRODUCTION CENTER
SaleAlert
- Shares
- 10,000
- Price
- $23.94
- Value
- $239,404
Zhou Rong
SENIOR EVP, PRODUCTION CENTER
SaleAlert
- Shares
- 3,187
- Price
- $23.63
- Value
- $75,306
PRINS RICHARD K
Director
SaleAlert
- Shares
- 7,973
- Price
- $20.30
- Value
- $161,852
PETERS WILLIAM J
CFO, EVP & TREASURER
Sale 10b5-1
- Shares
- 8,180
- Price
- $22.48
- Value
- $183,886
Zhou Rong
SENIOR EVP, PRODUCTION CENTER
SaleAlert
- Shares
- 9,787
- Price
- $26.20
- Value
- $256,379
Petersen Floyd F.
Director
SaleAlert
- Shares
- 2,426
- Price
- $25.92
- Value
- $62,888
Petersen Floyd F.
Director
SaleAlert
- Shares
- 1,737
- Price
- $25.69
- Value
- $44,620
PRINS RICHARD K
Director
SaleAlert
- Shares
- 4,179
- Price
- $27.10
- Value
- $113,253
Petersen Floyd F.
Director
SaleAlert
- Shares
- 16,679
- Price
- $26.49
- Value
- $441,837
Petersen Floyd F.
Director
Sale 10b5-1
- Shares
- 500
- Price
- $25.27
- Value
- $12,633
Petersen Floyd F.
Director
Sale 10b5-1
- Shares
- 500
- Price
- $27.20
- Value
- $13,602
Petersen Floyd F.
Director
Sale 10b5-1
- Shares
- 500
- Price
- $30.98
- Value
- $15,492
Petersen Floyd F.
Director
Sale 10b5-1
- Shares
- 500
- Price
- $20.83
- Value
- $10,416
| Date | Insider | Transaction | Shares | Price | Value | Reading |
|---|---|---|---|---|---|---|
| Sep 21, 2026 | PETERS WILLIAM J CFO, EVP & TREASURER | Sale | 4,139 | $25.00 | $103,475 | |
| Sep 16, 2026 | Zhou Rong SENIOR EVP, PRODUCTION CENTER | Sale | 10,000 | $23.94 | $239,404 | |
| Sep 02, 2026 | Zhou Rong SENIOR EVP, PRODUCTION CENTER | Sale | 3,187 | $23.63 | $75,306 | |
| Aug 11, 2026 | PRINS RICHARD K Director | Sale | 7,973 | $20.30 | $161,852 | |
| Aug 07, 2026 | PETERS WILLIAM J CFO, EVP & TREASURER | Sale | 8,180 | $22.48 | $183,886 | |
| Dec 17, 2025 | Zhou Rong SENIOR EVP, PRODUCTION CENTER | Sale | 9,787 | $26.20 | $256,379 | |
| Dec 12, 2025 | Petersen Floyd F. Director | Sale | 2,426 | $25.92 | $62,888 | |
| Dec 11, 2025 | Petersen Floyd F. Director | Sale | 1,737 | $25.69 | $44,620 | |
| Nov 25, 2025 | PRINS RICHARD K Director | Sale | 4,179 | $27.10 | $113,253 | |
| Nov 13, 2025 | Petersen Floyd F. Director | Sale | 16,679 | $26.49 | $441,837 | |
| Nov 03, 2025 | Petersen Floyd F. Director | Sale | 500 | $25.27 | $12,633 | |
| Oct 01, 2025 | Petersen Floyd F. Director | Sale | 500 | $27.20 | $13,602 | |
| Sep 02, 2025 | Petersen Floyd F. Director | Sale | 500 | $30.98 | $15,492 | |
| Aug 01, 2025 | Petersen Floyd F. Director | Sale | 500 | $20.83 | $10,416 |
“Alert” means a voluntary, unscheduled transaction according to the filing; it is not an investment recommendation. Official source: SEC EDGAR.