美国 · SEC FORM 4
Amphastar Pharmaceuticals, Inc.
AMPH · Nasdaq · CIK 0001297184 · Healthcare · Drug Manufacturers—Specialty & Generic
内部人信号
0 qualifying P purchase groups
当前 180 天评分窗口
15 同一窗口内观察到的 Form 4 交易行
5 sales · 10 期权、代扣税、授予、赠与或其他交易行
为什么没有活跃信号？
评分构成
活跃窗口内没有合资格买入，因此不计算分数。缺失的输入不会被当作零分或看空信号。
为什么没有分数？
- 没有合资格公开市场买入可提供聚集度、规模、角色、近期性或确信度输入。
- 卖出及其他 Form 4 活动继续作为背景显示，不会形成负分。
卖出和其他 Form 4 活动会单独显示，不会形成负面买入信号。没有买入不会被评分为看空。
内部人活动时间轴
申报人轨道展示最近 180 天。符号形状区分交易类型；卖出仅作为背景。
Showing the six most active owners; 3 additional owner(s) remain in Form 4 申报证据.
买方广度、集中度与聚集买入
合资格买入进入 180 天研究窗口后，这些模块才会启用。
信号历史
Scores are archived only when the company qualifies for a published US buy-signal snapshot. 最近一次合资格买入: 2020-08-14 · Maris David.
近期 Form 4 活动
P is an open-market or private purchase. S is a sale. M, F, A and G usually describe exercises, tax withholding, awards and gifts. These categories remain visually separate.
市场背景
市场背景补充近期价格表现与风险信息，不影响内部人信号。
价格表现
- 1M
- +7.1%
- 3M
- +29.7%
- 6M
- +24.4%
- 12M
- —
波动率与流动性
- 波动率
- 51.9%
- Beta
- 0.92
- 平均每日成交额
- USD 11.8M
估值
- 市值
- USD 1.1B
- P/E
- 15.0×
基本面
- 利润率
- 13.6%
- ROE
- 12.4%
- 细分行业
- Drug Manufacturers—Specialty & Generic
市场数据
价格数据截至：2026-10-03 · 价格来源：OpenBB/yfinance · 来自 SEC 申报文件：利润率, ROE · 财年截止日：2025-12-31 · 来自 Yahoo Finance：市值, P/E · Status: PASS
空头余额
空头余额是券商向 FINRA 申报的外部背景数据，不影响内部人信号。
- 空头股数
- 4,405,038
- 上期报告
- 4,994,808
- 日均成交量
- 620,832
- 回补天数
- 7.1
FINRA 结算日：2026-09-30 · 获取日期 2026-10-12 · FINRA 股票空头余额 ↗. 这是股数，每月两个结算日之后约一周公布；不是占已发行股份的比例。
历史股票买入
Qualifying code P transactions in the local Form 4 history, including purchases outside the current signal window.
| Transaction date | Reporting owner | 类型 | 证券 | 股数 | 平均价格 | 估算金额 | 来源 |
|---|---|---|---|---|---|---|---|
| 2020-08-14 | Maris David | 买入 (P) | Common Stock | 1,000 | USD 20.26 | USD 20,260 | SEC 申报 ↗ |
Form 4 申报证据
49 transaction lines in the latest 365-day window; 614 in local history.
| 日期 | 申报人 | 类型 | 证券 | 股数 | 平均价格 | 估算金额 | 来源 |
|---|---|---|---|---|---|---|---|
| 2026-09-21 | PETERS WILLIAM J | 卖出 (S) | Common Stock | 4,139 | USD 25.00 | USD 103,475 | SEC 申报 ↗ |
| 2026-09-16 | Zhou Rong | 卖出 (S) | Common Stock | 10,000 | USD 23.94 | USD 239,400 | SEC 申报 ↗ |
| 2026-09-16 | Zhou Rong | 期权行权／转换 (M) | Common Stock | 10,000 | USD 13.35 | USD 133,500 | SEC 申报 ↗ |
展开近期 Form 4 证据 (30 grouped rows)
| 日期 | 申报人 | 类型 | 证券 | 股数 | 平均价格 | 估算金额 | 来源 |
|---|---|---|---|---|---|---|---|
| 2026-09-21 | PETERS WILLIAM J | 卖出 (S) | Common Stock | 4,139 | USD 25.00 | USD 103,475 | SEC 申报 ↗ |
| 2026-09-16 | Zhou Rong | 卖出 (S) | Common Stock | 10,000 | USD 23.94 | USD 239,400 | SEC 申报 ↗ |
| 2026-09-16 | Zhou Rong | 期权行权／转换 (M) | Common Stock | 10,000 | USD 13.35 | USD 133,500 | SEC 申报 ↗ |
| 2026-09-02 | Zhou Rong | 卖出 (S) | Common Stock | 3,187 | USD 23.63 | USD 75,309 | SEC 申报 ↗ |
| 2026-08-11 | PRINS RICHARD K | 卖出 (S) | Common Stock | 7,973 | USD 20.30 | USD 161,852 | SEC 申报 ↗ |
| 2026-08-07 | PETERS WILLIAM J | 卖出 (S) | Common Stock | 8,180 | USD 22.48 | USD 183,886 | SEC 申报 ↗ |
| 2026-08-07 | PETERS WILLIAM J | 期权行权／转换 (M) | Common Stock | 5,053 | USD 19.79 | USD 99,999 | SEC 申报 ↗ |
| 2026-07-09 | Pierce Anthony T | 奖励／授予 (A) | Common Stock | 7,886 | USD 0.00 | USD 0 | SEC 申报 ↗ |
| 2026-06-02 | Lee Howard | 代扣税 (F) | Common Stock | 769 | USD 18.45 | USD 14,188 | SEC 申报 ↗ |
| 2026-06-01 | ZASLOFF MICHAEL A | 奖励／授予 (A) | Common Stock | 8,143 | USD 0.00 | USD 0 | SEC 申报 ↗ |
| 2026-06-01 | PRINS RICHARD K | 奖励／授予 (A) | Common Stock | 8,143 | USD 0.00 | USD 0 | SEC 申报 ↗ |
| 2026-06-01 | Lee Howard | 奖励／授予 (A) | Common Stock | 8,143 | USD 0.00 | USD 0 | SEC 申报 ↗ |
| 2026-06-01 | Gerst Diane G. | 奖励／授予 (A) | Common Stock | 8,143 | USD 0.00 | USD 0 | SEC 申报 ↗ |
| 2026-06-01 | Gaugh David Russell | 奖励／授予 (A) | Common Stock | 8,143 | USD 0.00 | USD 0 | SEC 申报 ↗ |
| 2026-06-01 | Deflin Gayle | 奖励／授予 (A) | Common Stock | 8,143 | USD 0.00 | USD 0 | SEC 申报 ↗ |
| 2026-03-15 | Zhou Rong | 代扣税 (F) | Common Stock | 1,225 | USD 18.18 | USD 22,270 | SEC 申报 ↗ |
| 2026-03-15 | PETERS WILLIAM J | 代扣税 (F) | Common Stock | 1,973 | USD 18.18 | USD 35,869 | SEC 申报 ↗ |
| 2026-03-15 | Luo Mary Z.; Zhang Jack Y. | 代扣税 (F) | Common Stock | 12,692 | USD 18.18 | USD 230,741 | SEC 申报 ↗ |
| 2026-03-15 | Liawatidewi Yakob | 代扣税 (F) | Common Stock | 1,033 | USD 18.18 | USD 18,780 | SEC 申报 ↗ |
| 2026-03-10 | Zhou Rong | 代扣税 (F) | Common Stock | 2,215 | USD 18.91 | USD 41,886 | SEC 申报 ↗ |
| 2026-03-10 | PETERS WILLIAM J | 代扣税 (F) | Common Stock | 3,297 | USD 18.91 | USD 62,346 | SEC 申报 ↗ |
| 2026-03-10 | Luo Mary Z.; Zhang Jack Y. | 代扣税 (F) | Common Stock | 19,180 | USD 18.91 | USD 362,694 | SEC 申报 ↗ |
| 2026-03-10 | Liawatidewi Yakob | 代扣税 (F) | Common Stock | 1,870 | USD 18.91 | USD 35,362 | SEC 申报 ↗ |
| 2026-03-09 | Zhou Rong | 奖励／授予 (A) | Common Srock | 39,432 | USD 0.00 | USD 0 | SEC 申报 ↗ |
| 2026-03-09 | PETERS WILLIAM J | 奖励／授予 (A) | Common Stock | 58,693 | USD 0.00 | USD 0 | SEC 申报 ↗ |
| 2026-03-09 | Luo Mary Z.; Zhang Jack Y. | 奖励／授予 (A) | Common Stock | 252,966 | USD 0.00 | USD 0 | SEC 申报 ↗ |
| 2026-03-09 | Liawatidewi Yakob | 奖励／授予 (A) | Common Stock | 35,450 | USD 0.00 | USD 0 | SEC 申报 ↗ |
| 2026-03-06 | Zhou Rong | 代扣税 (F) | Common Stock | 1,357 | USD 19.34 | USD 26,244 | SEC 申报 ↗ |
| 2026-03-06 | PETERS WILLIAM J | 代扣税 (F) | Common Stock | 2,146 | USD 19.34 | USD 41,504 | SEC 申报 ↗ |
| 2026-03-06 | Luo Mary Z.; Zhang Jack Y. | 代扣税 (F) | Common Stock | 10,850 | USD 19.34 | USD 209,839 | SEC 申报 ↗ |
Multiple price lines in one filing are grouped and share-weighted. Price and value are blank when a grouped filing line lacks price evidence.
快照与身份
| 快照日期 | 2026-10-18 |
|---|---|
| 排名版本 | US-v1.2 |
| 数据质量 | PASS ELIGIBLE · — |
| 股票代码 | AMPH |
| CIK | 0001297184 |
| 行业 | Healthcare |
| 细分行业 | Drug Manufacturers—Specialty & Generic Yahoo Finance |
| SEC SIC | 2834 Pharmaceutical Preparations |
| 交易所 | Nasdaq |
数据覆盖
| 本地 Form 4 历史 | 614 transaction lines from 2020-01-02 to 2026-09-21 1 P purchase lines · 255 S sale lines · 358 other lines |
|---|---|
| SEC 公司申报 | 打开 SEC 申报 ↗ |
Local ledger as of 2026-10-18. Mapping status is an audit field and does not erase SEC filing evidence.