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