SEC Filing Analysis: MACOM Technology Solutions Holdings, Inc. (MTSI)

Executive Summary

• Trading Significance: High
• Key Takeaway: A 10% stockholder, Susan Ocampo, has filed a notice of proposed sale for $1.3M worth of stock. This action is part of a much larger, highly significant pattern of selling, with the same insider having disposed of over $188M in stock (1.82% of shares outstanding) in the preceding three months.
• Market Impact: The continued offloading of a substantial position by a major insider could place downward pressure on the stock and may signal a lack of confidence in the company's near-term prospects to investors.

Company Information

Field	Value
Company	MACOM Technology Solutions Holdings, Inc.
Ticker Symbol	MTSI
CIK	0001493594
Industry	Semiconductors & Related Devices

Insider Information

Field	Value
Name	OCAMPO SUSAN
CIK	0001252243
Title/Position	null
Relationship	10% Stockholder

Transaction Details

Field	Value
Form Type	144 (Notice of Proposed Sale)
Transaction Date	2025-10-29 (Approximate Sale Date)
Transaction Code	null
Security Type	Common Stock
Shares Involved	8,358
Price Per Share	~$154.00 (Calculated)
Total Value	$1,287,132.00
Shares Owned After	Not Disclosed
Ownership Type	Indirect (Trusts)

Financial Impact Assessment

Transaction Materiality

This analysis considers the cumulative sales by the insider over the last 3 months, as disclosed in the filing, which provides critical context.

Metric	Proposed Sale	Cumulative Sales (Last 3 Months)
Transaction Value	$1,287,132	$188,100,713
% of Market Cap ($10.90B)	0.012%	1.73%
Shares Transacted	8,358	1,352,929
% of Shares Outstanding	0.011%	1.82%
Materiality Assessment	Low (in isolation)	Highly Significant (in context)

Impact Evaluation

• Market Cap Context: For a large-cap company like MACOM ($10.90B), an individual $1.3M sale is negligible. However, the cumulative sale of $188.1M represents a substantial 1.73% of the company's entire market capitalization, making it a highly material event.
• Ownership Concentration: As a 10% stockholder, Susan Ocampo's holdings are significant. The sale of 1.82% of all outstanding shares in just three months represents a rapid and substantial reduction of this position.
• Transaction Significance: The significance is High not because of the single proposed sale, but due to the clear and aggressive pattern of divestment. The sale of over 1.35 million shares far exceeds the materiality threshold of 0.5% of shares outstanding, indicating a strong intent to liquidate a large portion of the insider's holdings.

Market Impact Analysis

Stock Impact Prediction

• Direction: Negative
• Reasoning: Consistent, heavy selling from a major insider is a classic bearish indicator. It can suggest that the insider believes the stock is fully valued or sees potential headwinds. This sustained supply of shares on the open market can create an overhang and suppress price appreciation.

Volume & Sentiment

• Expected Volume Impact: The ongoing sales have likely contributed to trading volume and will continue to do so, potentially absorbing buying interest.
• Sentiment Indicator: Bearish. The scale and consistency of the sales by a major, long-term shareholder (founder shares acquired in 2009) outweigh the fundamentals for many short-term traders.

Investment Insights

Positive Market Indicators

• The filing itself does not contain positive indicators.

Risk Factors

• Sustained Insider Selling: The primary risk is the continuation of this selling pressure from a major shareholder.
• Negative Signaling: The market may interpret these sales as a vote of no confidence from a well-informed insider, potentially leading to broader selling.
• Stock Overhang: The knowledge that a large seller is active in the market can deter new buyers and cap upward price movement.

Key Takeaways

1. A 10% owner, Susan Ocampo, is continuing a significant selling trend.
2. Over the last three months, the insider has sold over $188M worth of stock, representing 1.82% of all shares outstanding.
3. This pattern of large-scale divestment is a highly significant bearish signal, far more important than the small, individual proposed sale in this Form 144 filing.

Additional Context

Transaction Notes

• Source of Shares: The shares for the proposed sale are noted as 'Founder Shares' acquired in 2009, indicating a very low cost basis and a long holding period.
• Ownership Structure: The filing remarks state the transactions encompass two trust accounts for which Susan Ocampo is the trustee, indicating the sales are likely part of a wealth management or estate planning strategy, though the scale remains notable.