Sec Amendments Review

SEC Amendments Review

Review amendments to SEC filings and identify material changes or corrections for public companies using the Octagon MCP server.

Prerequisites

Ensure Octagon MCP is configured in your AI agent (Cursor, Claude Desktop, Windsurf, etc.). See references/mcp-setup.md for installation instructions.

Workflow

1. Identify Analysis Parameters

Determine the following before querying:

• Ticker: Stock symbol (e.g., AAPL, MSFT, GOOGL)
• Time Period (optional): Recent amendments, specific date range
• Filing Type (optional): Specific amendment types of interest

2. Execute Query via Octagon MCP

Use the octagon-agent tool with a natural language prompt:

Review recent amendments to SEC filings for <TICKER> and identify material changes or corrections.

MCP Call Format:

{
  "server": "octagon-mcp",
  "toolName": "octagon-agent",
  "arguments": {
    "prompt": "Review recent amendments to SEC filings for AMZN and identify material changes or corrections."
  }
}

3. Expected Output

The agent returns structured amendment analysis including:

Recent Amendments:

• Form 144/A: Amended report of proposed securities sales
• Filing date and description
• Material changes identified

Related Filings:

• Original filings being amended
• Subsequent transactions (e.g., bond offerings)

Data Sources: octagon-sec-agent, octagon-web-search-agent

4. Interpret Results

See references/interpreting-results.md for guidance on:

• Understanding amendment types
• Assessing materiality of changes
• Tracking restatement patterns
• Evaluating correction significance

Example Queries

General Amendment Review:

Review recent amendments to SEC filings for AMZN and identify material changes or corrections.

10-K Amendments:

Has TSLA filed any 10-K/A amendments in the past year and what changes were made?

Restatement Search:

Identify any financial restatements or 10-Q/A amendments filed by META in 2025.

S-1 Amendment Tracking:

Track the S-1/A amendments filed by Reddit during their IPO process.

8-K Corrections:

Find any 8-K/A amendments for NVDA that corrected prior disclosures.

Proxy Amendments:

Review DEF 14A amendments for AAPL and identify changes to compensation disclosures.

Amendment Types

Periodic Report Amendments

Registration Statement Amendments

Proxy Statement Amendments

Other Amendments

Reasons for Amendments

Financial Restatements

Disclosure Updates

Registration Statement Updates

Materiality Assessment

High Materiality Amendments

Medium Materiality Amendments

Low Materiality Amendments

Amendment Analysis Framework

Key Questions

1. What changed? - Specific sections modified 2. Why? - Stated reason for amendment 3. When? - Timing relative to original 4. How material? - Impact on financials/operations 5. Pattern? - History of amendments

Red Flags

1. Frequent restatements - Recurring accuracy issues 2. Delayed amendments - Long gaps from original 3. Material weakness - Control deficiencies 4. SEC comment response - Regulatory concerns 5. Multiple rounds - Repeated amendments 6. Downward revisions - Reduced financials

S-1/A Amendment Tracking

IPO Amendment Progression

Key Changes to Track

10-K/A and 10-Q/A Analysis

Common Amendment Reasons

Financial Impact Assessment

8-K/A Analysis

Amendment Purposes

Timing Considerations

Tracking Amendment Patterns

Company History

Track over time:

• Frequency of amendments
• Types filed
• Reasons stated
• Time to amend

Peer Comparison

Compare to industry:

• Amendment frequency
• Types of corrections
• Materiality levels
• Response times

Analysis Tips

1. Compare versions: Use SEC compare tools to see exact changes.

2. Read cover page: Amendment reason often stated upfront.

3. Check exhibits: Often key documents added/corrected.

4. Note timing: Gaps between filings reveal issues.

5. Track patterns: Recurring amendments signal problems.

6. Cross-reference 8-Ks: Material amendments often disclosed.

Use Cases

• Due diligence: Identify correction history
• Risk assessment: Track restatement patterns
• IPO analysis: Monitor S-1 amendment progression
• Governance review: Evaluate filing quality
• Compliance monitoring: Track regulatory responses

SEC Amendments Review Skill

Review amendments to SEC filings and identify material changes or corrections using the Octagon MCP server.

Installation

npx skills add OctagonAI/skills --skill sec-amendments-review

<details> <summary>bun</summary>

bunx skills add OctagonAI/skills --skill sec-amendments-review

</details>

<details> <summary>pnpm</summary>

pnpm dlx skills add OctagonAI/skills --skill sec-amendments-review

</details>

What This Skill Does

This skill analyzes SEC filing amendments:

• Material change identification
• Restatement analysis
• Error corrections
• Amendment reason categorization

Example Usage

Review amendments to recent SEC filings for material changes

---

Octagon MCP Setup

This skill requires the Octagon MCP server to be configured in your AI agent.

Get Your API Key

1. Sign up at Octagon 2. Navigate to API Keys from the left menu 3. Generate and save your API key

Configure Cursor

1. Open Cursor Settings → Features > MCP Servers 2. Click + Add New MCP Server 3. Enter:

• Name: octagon-mcp
• Type: command
• Command: env OCTAGON_API_KEY=<your-api-key> npx -y octagon-mcp

Windows: cmd /c "set OCTAGON_API_KEY=<your-api-key> && npx -y octagon-mcp"

Configure Claude Desktop

Add to claude_desktop_config.json:

{
  "mcpServers": {
    "octagon-mcp-server": {
      "command": "npx",
      "args": ["-y", "octagon-mcp@latest"],
      "env": {
        "OCTAGON_API_KEY": "YOUR_API_KEY_HERE"
      }
    }
  }
}

Documentation

• Octagon Docs
• Octagon MCP GitHub

Interpreting Amendments Review Results

Reading the Output

The octagon-agent returns structured amendment analysis with source citations:

Amendments Identified:

• Form type and amendment designation
• Filing date
• Description of changes

Material Changes:

• Nature of corrections or updates
• Impact assessment
• Related filings

Understanding Amendment Designations

Amendment Suffixes

Common Amendment Forms

Evaluating Amendment Materiality

Severity Scale

Materiality Indicators

Restatement Analysis

Types of Restatements

Restatement Red Flags

1. Revenue-related - Core business impact 2. Multiple periods - Systemic issues 3. Fraud indicators - Intentional misstatement 4. Control weakness - Underlying problems 5. Recurring - Pattern of issues

Impact Assessment

S-1/A Amendment Interpretation

IPO Amendment Cycle

Key Changes Between Amendments

SEC Comment Patterns

10-K/A and 10-Q/A Analysis

Common Amendment Contents

Timing Interpretation

8-K/A Analysis

Amendment Purposes

Evaluating 8-K/A Changes

Ownership Amendment Analysis (13D/A, 13G/A)

What Triggers Amendments

What to Track

Insider Filing Amendments (Form 4/A)

Common Corrections

Significance Assessment

Amendment Pattern Analysis

Company History Assessment

Track over time:

Benchmarking

Red Flags Summary

Immediate Concerns

1. Restatement of revenue - Core earnings quality 2. Material weakness - Control environment 3. Multiple amendments - Recurring issues 4. Auditor qualification - Changed opinion 5. SEC enforcement - Regulatory action

Watch Items

1. Delayed amendments - Long gaps 2. Frequent minor amendments - Process issues 3. Pattern changes - Increasing frequency 4. Concentrated amendments - Same areas 5. Exhibit-only amendments - Completeness issues

Using Results for Analysis

Due Diligence Checklist

Investment Implications

Next Steps After Analysis

1. Read full amendment: Understand complete changes 2. Compare versions: Use SEC tools for diff 3. Check 8-Ks: Related current reports 4. Review auditor letter: Opinion changes 5. Track resolution: How issues addressed 6. Monitor future filings: Recurrence check

Octagon MCP Setup

Get Your Octagon API Key

1. Sign up for a free account at Octagon 2. After logging in, from left menu, navigate to API Keys 3. Generate a new API key 4. Save the key securely - you'll need it for configuration

Prerequisites

Before installing or running Octagon MCP, you need to have npx (which comes with Node.js and npm) installed on your system.

Mac (macOS)

1. Install Homebrew (if you don't have it):

   /bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"

2. Install Node.js (includes npm and npx):

   brew install node

3. Verify installation:

   node -v
   npm -v
   npx -v

Windows

1. Download the Node.js installer:

• Go to https://nodejs.org/ and download the LTS version for Windows.

2. Run the installer and follow the prompts. This will install Node.js, npm, and npx. 3. Verify installation: Open Command Prompt and run:

   node -v
   npm -v
   npx -v

If you see version numbers for all three, you are ready to proceed.

Configure Cursor

1. Open Cursor Settings 2. Go to Features > MCP Servers 3. Click + Add New MCP Server 4. Enter:

• Name: octagon-mcp
• Type: command
• Command: env OCTAGON_API_KEY=<your-api-key> npx -y octagon-mcp

Replace <your-api-key> with your actual Octagon API key.

Windows users: Use this command format instead:

cmd /c "set OCTAGON_API_KEY=<your-api-key> && npx -y octagon-mcp"

After adding, refresh the MCP server list to see the new tools. The Composer Agent will automatically use Octagon MCP when appropriate. Access the Composer via Command+L (Mac), select "Agent" next to the submit button, and enter your query.

Configure Claude Desktop

1. Open Claude Desktop 2. Go to Settings > Developer > Edit Config 3. Add the following to your claude_desktop_config.json:

{
  "mcpServers": {
    "octagon-mcp-server": {
      "command": "npx",
      "args": ["-y", "octagon-mcp@latest"],
      "env": {
        "OCTAGON_API_KEY": "YOUR_API_KEY_HERE"
      }
    }
  }
}

4. Restart Claude for the changes to take effect

Configure Windsurf

Add this to your ./codeium/windsurf/model_config.json:

{
  "mcpServers": {
    "octagon-mcp-server": {
      "command": "npx",
      "args": ["-y", "octagon-mcp@latest"],
      "env": {
        "OCTAGON_API_KEY": "YOUR_API_KEY_HERE"
      }
    }
  }
}

Verify Setup

1. Refresh the MCP server list 2. The octagon-agent tool should appear in available tools 3. Test with a simple query:

   Retrieve the current stock price for AAPL

Available Tools

Troubleshooting

API Key Issues: Verify the key is correctly set in the command string with no extra spaces.

Connection Issues: Ensure you have internet connectivity and the Octagon API is accessible.

Rate Limiting: Reduce query frequency if encountering rate limit errors.

Documentation

Full documentation: https://docs.octagonagents.com