13F 申报指南13F 概念全攻略
什么是 SEC Form 13F 申报？美股机构大户持股全攻略
完整解读 Form 13F 申报规范、1 亿美元门槛与 45 天延迟申报机制，学会如何追踪顶级对冲基金与机构法人持仓动向。
AlphaSMO 权威研究指南阅读专题
CIK: 0001486083
申报总市值
US$3.4亿
US$3.4亿
103 檔
27.2%
Q3 2025 季度申报显示，Corundum Group, Inc. 披露的美股组合总市值为 US$3.4亿，涵盖 103 个不同之权益投资仓位。
Corundum Group, Inc. 在 Q3 2025 进行了结构性的板块轮动与仓位换股。在开立 5 个全新仓位及加仓 19 档持股的同时，亦同步清仓 2 档并减仓 19 档标的。
在资产配置集中度方面，Corundum Group, Inc. 的前 5 大核心持股（包含 IWF, IWD, 等）合计占整体申报市值的 27.2%，反映机构在主要关键仓位上的权重分布。
本季最大新建仓标的
市值: US$69.3万
本季最大获利了结 / 清仓标的
UNP
前期市值: US$30.0万
| # | 代码 | 标的名称 | 资产子类别 | 占比 | 占比变动 | 持仓量变化 | 4Q Trend |
|---|---|---|---|---|---|---|---|
| 1 | IWF | Ishares Russell 1000 Growth | ETF-其他 | 12.47% | +0.42% | — | |
| 2 | IWD | Ishares Russell 1000 Value E | ETF-其他 | 10.27% | +0.18% | +5.60% | |
| 3 | ✓ | 股票-其他 | 6.24% | — | -0.31% | ||
| 4 | EFA | Ishares Msci Eafe ETF | ETF-其他 | 4.93% | -0.19% | +1.59% | |
| 5 | IWO | Ishares Russell 2000 Growth | ETF-中小型股 | 3.80% | +0.36% | -0.50% | |
| 6 | SUSA | Ishares Esg Optimized Msci U | ETF-其他 | 3.51% | -0.02% | -1.75% | |
| 7 | ✓ | 股票-其他 | 3.26% | — | -5.90% | ||
| 8 | MSFT | Microsoft CORP | 股票-科技 | 3.18% | -0.16% | -1.19% | |
| 9 | IWN | Ishares Russell 2000 Value E | ETF-中小型股 | 3.17% | +0.09% | +1.97% | |
| 10 | IWP | Ishares Russell Mid-cap Grow | ETF-其他 | 3.16% | +0.08% | — | |
| 11 | IWS | Ishares Russell Mid-cap Valu | ETF-其他 | 2.99% | -0.33% | +4.21% | |
| 12 | AAPL | Apple Inc | 股票-科技 | 2.45% | +0.11% | -1.96% | |
| 13 | ✓ | 股票-其他 | 1.54% | — | +0.75% | ||
| 14 | ✓ | 股票-其他 | 1.34% | — | -0.58% | ||
| 15 | IWB | Ishares Russell 1000 ETF | ETF-其他 | 1.28% | +0.05% | +1.51% | |
| 16 | ✓ | 股票-其他 | 1.27% | — | -2.17% | ||
| 17 | ✓ | 股票-其他 | 1.26% | — | -4.66% | ||
| 18 | ✓ | 股票-其他 | 1.21% | — | +1.00% | ||
| 19 | ✓ | 股票-其他 | 1.10% | — | +0.82% | ||
| 20 | ✓ | 股票-其他 | 1.04% | — | -1.73% | ||
| 21 | IWM | Ishares Russell 2000 ETF | ETF-中小型股 | 1.03% | +0.12% | +2.82% | |
| 22 | IVW | Ishares S&p 500 Growth ETF | ETF-大型股与成长 | 1.02% | +0.05% | — | |
| 23 | ✓ | 股票-其他 | 0.96% | — | -1.34% | ||
| 24 | ✓ | 股票-其他 | 0.88% | — | -2.03% | ||
| 25 | ✓ | 股票-其他 | 0.82% | — | +0.78% | ||
| 26 | IJH | Ishares Core S&p Midcap ETF | ETF-其他 | 0.81% | — | -2.84% | |
| 27 | AMZN | Amazon.com Inc | 股票-周期性消费 | 0.81% | +0.02% | -0.42% | |
| 28 | ✓ | 股票-其他 | 0.78% | — | +1.19% | ||
| 29 | ✓ | 股票-其他 | 0.78% | — | -1.64% | ||
| 30 | ✓ | 股票-其他 | 0.76% | — | -0.02% | ||
| 31 | ✓ | 股票-其他 | 0.74% | — | -1.65% | ||
| 32 | ✓ | 股票-其他 | 0.71% | — | -0.29% | ||
| 33 | VOO | Vanguard S&p 500 ETF | ETF-大型股与成长 | 0.70% | +0.06% | +1.20% | |
| 34 | CAT | Caterpillar Inc | 股票-工业 | 0.65% | +0.25% | -0.99% | |
| 35 | HD | Home Depot Inc | 股票-周期性消费 | 0.64% | -0.02% | +1.55% | |
| 36 | ✓ | 股票-其他 | 0.60% | — | -3.04% | ||
| 37 | ECL | Ecolab Inc | 股票-原材料 | 0.57% | -0.03% | -0.47% | |
| 38 | JNJ | Johnson & Johnson | 股票-医疗保健 | 0.56% | -0.06% | -0.88% | |
| 39 | ✓ | 股票-其他 | 0.55% | — | -0.11% | ||
| 40 | ✓ | 股票-其他 | 0.55% | — | -2.46% | ||
| 41 | USB | US Bancorp | 股票-金融 | 0.54% | +0.02% | -2.54% | |
| 42 | BRK-B | Berkshire Hathaway Inc-cl B | 股票-其他 | 0.54% | -0.03% | +0.19% | |
| 43 | ✓ | 股票-其他 | 0.52% | — | -0.28% | ||
| 44 | BAC | Bank Of America CORP | 股票-金融 | 0.51% | +0.02% | -2.43% | |
| 45 | ✓ | 股票-其他 | 0.51% | — | -1.90% | ||
| 46 | IVE | Ishares S&p 500 Value ETF | ETF-大型股与成长 | 0.51% | -0.03% | -3.13% | |
| 47 | LLY | Eli Lilly & Co | 股票-医疗保健 | 0.51% | +0.09% | -0.98% | |
| 48 | ✓ | 股票-其他 | 0.49% | — | -0.27% | ||
| 49 | ABT | Abbott Laboratories | 股票-医疗保健 | 0.48% | -0.08% | -0.33% | |
| 50 | BMY | Bristol-myers Squibb Co | 股票-医疗保健 | 0.47% | -0.08% | -0.13% |
| # | 代码 | 标的名称 | 占比变动 | 持仓量变化 | 异动类型 |
|---|---|---|---|---|---|
| 1 | IWF | Ishares Russell 1000 Growth | +1.3% | — | 不变 |
| 2 | ✓ | +0.4% | +0.82% | 加仓 | |
| 3 | ✓ | +0.4% | -1.34% | 减仓 | |
| 4 | ✓ | +0.4% | -4.66% | 减仓 | |
| 5 | MSFT | Microsoft CORP | +0.3% | -1.19% | 减仓 |
| 6 | ✓ | +0.3% | -0.02% | 不变 | |
| 7 | ✓ | +0.3% | -3.04% | 加仓 | |
| 8 | IWO | Ishares Russell 2000 Growth | +0.3% | -0.50% | 加仓 |
| 9 | IWN | Ishares Russell 2000 Value E | +0.2% | +1.97% | 加仓 |
| 10 | ✓ | +0.2% | -2.03% | 减仓 | |
| 11 | ✓ | +0.2% | -0.29% | 加仓 | |
| 12 | CAT | Caterpillar Inc | +0.1% | -0.99% | 加仓 |
| 13 | IWP | Ishares Russell Mid-cap Grow | +0.1% | — | 不变 |
| 14 | AMGN | Amgen Inc | +0.1% | +0.23% | 加仓 |
| 15 | IVW | Ishares S&p 500 Growth ETF | +0.1% | — | 不变 |
| 16 | ✓ | +0.1% | -2.46% | 加仓 | |
| 17 | ADP | Automatic Data Processing | +0.1% | +0.18% | 加仓 |
| 18 | LLY | Eli Lilly & Co | +0.1% | -0.98% | 加仓 |
| 19 | ✓ | +0.1% | -2.17% | 减仓 | |
| 20 | INTC | Intel CORP | +0.1% | -2.21% | 加仓 |
| 21 | ANET | Arista Networks Inc | +0.1% | — | 不变 |
| 22 | IWB | Ishares Russell 1000 ETF | +0.1% | +1.51% | 加仓 |
| 23 | VOO | Vanguard S&p 500 ETF | +0.1% | +1.20% | 加仓 |
| 24 | ✓ | +0.1% | -0.58% | 减仓 | |
| 25 | IWS | Ishares Russell Mid-cap Valu | 0% | +4.21% | 加仓 |
| 26 | BAC | Bank Of America CORP | 0% | -2.43% | 减仓 |
| 27 | ✓ | 0% | -1.65% | 加仓 | |
| 28 | EFA | Ishares Msci Eafe ETF | — | +1.59% | 加仓 |
| 29 | ✓ | -0.1% | -1.73% | 减仓 | |
| 30 | AAPL | Apple Inc | -0.1% | -1.96% | 减仓 |
| 31 | ✓ | -0.1% | -5.90% | 减仓 | |
| 32 | ✓ | -0.1% | +0.75% | 加仓 | |
| 33 | IWD | Ishares Russell 1000 Value E | -0.1% | +5.60% | 加仓 |
| 34 | SUSA | Ishares Esg Optimized Msci U | -0.1% | -1.75% | 减仓 |
| 35 | ✓ | -0.2% | +7.80% | 减仓 | |
| 36 | ✓ | -0.2% | -30.07% | 减仓 | |
| 37 | HON | Honeywell International Inc | -0.2% | +2.13% | 减仓 |
| 38 | UPS | United Parcel Service-cl B | -0.2% | +3.51% | 减仓 |
| 39 | ✓ | -0.2% | +1.37% | 减仓 | |
| 40 | BMY | Bristol-myers Squibb Co | -0.3% | -0.13% | 加仓 |
| 41 | ✓ | -0.5% | -7.13% | 减仓 | |
| 42 | IWM | Ishares Russell 2000 ETF | -0.5% | +2.82% | 减仓 |
| 43 | ✓ | -0.8% | -0.31% | 减仓 | |
| 44 | ✓ | — | NEW | 新建仓 | |
| 45 | MU | Micron Technology Inc | — | NEW | 新建仓 |
| 46 | ✓ | — | NEW | 新建仓 | |
| 47 | UNP | Union Pacific CORP | — | EXIT | 清仓 |
| 48 | TMO | Thermo Fisher Scientific Inc | — | EXIT | 清仓 |
| 49 | TSM | Taiwan Semiconductor-sp Adr | — | NEW | 新建仓 |
| 50 | MPWR | Monolithic Power Systems Inc | — | NEW | 新建仓 |
根据 SEC 官方 Form 13F 申报备案，Corundum Group, Inc. 在 Q3 2025 季度的美股持仓总市值约为 US$3.4亿，共申报了 103 个公开持股仓位。
在 Q3 2025 季度，Corundum Group, Inc. 按市值排列的前三大核心持股分别为：IWF (12.5%)、IWD (10.3%)、 (6.2%)。其中最大持股仓位 IWF 占据整体投资组合约 12.5% 的权重。
在 Q3 2025 季度中，Corundum Group, Inc. 共进行了 45 项持仓异动，包含新建仓 5 个仓位、加仓 19 个仓位、减仓 19 个仓位以及清仓 2 个仓位。 其中最大新建仓标的为 。 本季清仓仓位包含 UNP。
本页面所有持股数据均直接同步自美国证券交易委员会（SEC）EDGAR 官方系统之 13F-HR / 13F-HR/A 季度申报文件。AlphaSMO 通过机器解析 CUSIP 与个股对照，提供 100% 精准对齐的历史时序数据集，并支持 Schema.org 结构化数据格式。
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完整解读 Form 13F 申报规范、1 亿美元门槛与 45 天延迟申报机制，学会如何追踪顶级对冲基金与机构法人持仓动向。
深入剖析 5% 股权申报门槛、13D 与 13G 之差异，以及最新 SEC 申报时程规范，洞察机构法人的激进投资动向。