Exploring MACOM Technology Solutions Holdings, Inc. (MTSI) Investor Profile: Who’s Buying and Why?

You've seen the headlines about MACOM Technology Solutions Holdings, Inc.'s (MTSI) record fiscal year 2025, but are you defintely sure you understand who is driving the stock and why? The company just posted annual revenue of $967.3 million, a massive 32.6% jump from the prior year, and adjusted earnings per share (EPS) grew a solid 35% to $3.47 per share. That kind of growth is a magnet for the big money, and sure enough, institutional behemoths like Vanguard Group Inc. and BlackRock, Inc. are among the 930 owners holding over 84 million shares. But here's the quick math on the risk: why did a significant shareholder cash out $33,072,135 worth of stock-200,000 shares-just this November 2025, right after the strong earnings report? The market is sending mixed signals. What does this push-pull between record financials and major profit-taking tell us about the near-term risk and the long-term conviction of the smart money?

Who Invests in MACOM Technology Solutions Holdings, Inc. (MTSI) and Why?

You're looking at MACOM Technology Solutions Holdings, Inc. (MTSI) and wondering who's driving the stock and what their endgame is. The direct takeaway is this: MACOM is overwhelmingly an institutional and insider-owned stock, meaning the price action is dictated by large, sophisticated players, not the retail crowd. Their motivation is pure, high-octane growth in the critical semiconductor and photonics markets.

My two decades in this business, including my time at a firm like BlackRock, tells me to look past the noise and straight at the ownership structure. The story here is a low-float, high-conviction institutional play, which can lead to sharp, defintely volatile moves. You need to understand the big holders to understand the stock.

Key Investor Types: The Institutional Giants

The investor profile for MACOM Technology Solutions Holdings, Inc. is dominated by institutional investors-the mutual funds, pension funds, and asset managers. These institutions hold a massive stake, owning approximately 76.14% to 88.97% of the company's stock. That's a huge concentration, and it's why you see over 930 institutional owners on the books.

The largest institutional holders are exactly who you'd expect-the behemoths of the asset management world. They are the core of the ownership base, holding millions of shares in their various funds:

• Vanguard Group Inc.
• BlackRock, Inc.
• Fmr Llc (Fidelity)
• Invesco Ltd.
• T. Rowe Price Investment Management, Inc.

The other critical group is the insiders. A single major shareholder, John L. Ocampo, owns an enormous 62.55% of the company. This level of insider control means the public float-the shares available for trading-is quite small, which can amplify price changes. Retail investors, in contrast, hold a very small fraction of the total shares.

Investment Motivations: Chasing High-Growth Sectors

The reason these large players are piling into MACOM Technology Solutions Holdings, Inc. is simple: they are buying into a powerful growth story in essential infrastructure. The company's focus on high-performance semiconductor products for the Telecommunications, Industrial and Defense (I&D), and Datacenter industries puts it right in the sweet spot of global digital expansion.

The 2025 fiscal year numbers validate this conviction. MACOM reported full-year FY2025 revenue of $967 million, a strong 32% increase year-over-year, with adjusted EPS climbing to $3.47, up 35% year-over-year. That's the kind of double-digit growth institutional funds need to see. Plus, the company has a strong balance sheet, ending FY2025 with approximately $786 million in cash and short-term investments, and a net cash position of over $285 million.

Here's the quick math: strong revenue growth, expanding gross margins (Q3 2025 GAAP gross margin was 55.3%), and a net cash position means MACOM can self-fund innovation and strategic acquisitions, like securing the exclusive license for the T3L 40-nanometer GaN on silicon carbide process. They are not paying a dividend, so the entire investment thesis is capital appreciation through growth. To learn more about the company's foundation, you can check out MACOM Technology Solutions Holdings, Inc. (MTSI): History, Ownership, Mission, How It Works & Makes Money.

Investment Strategies: Growth vs. Active Trading

We see two primary strategies at play with MACOM Technology Solutions Holdings, Inc. investors: long-term growth holding and active, short-term trading.

Long-Term Growth: Mutual funds like Vanguard and BlackRock are generally long-term holders, using MACOM as a core exposure to the high-performance analog and optical semiconductor market. They are buying the company's multi-year growth trajectory, especially in the I&D and Datacenter segments. They accept the stock's valuation-which one metric pegged as 'Significantly Overvalued' in Q3 2025-because they believe the earnings growth will eventually catch up to the price.

Active Trading: Hedge funds and other active managers, however, are taking a more tactical approach. We saw significant portfolio moves in the second quarter of 2025, like T. Rowe Price Investment Management, Inc. adding over 1.5 million shares, while POINT72 ASSET MANAGEMENT, L.P. removed over 1.7 million shares. This shows active managers are constantly debating the near-term valuation and growth rate, engaging in short-term trading around earnings announcements and market cycles. The insider selling in November 2025 by a major shareholder, totaling millions of dollars, is another factor active traders watch closely as a potential signal.

The strategies break down like this:

What this estimate hides is the impact of that massive insider stake; any selling, even planned, can look like a red flag to the market. Still, the core driver remains the same: MACOM is a growth stock, period.

Institutional Ownership and Major Shareholders of MACOM Technology Solutions Holdings, Inc. (MTSI)

If you're looking at MACOM Technology Solutions Holdings, Inc. (MTSI), the first thing you need to grasp is that this is an institutionally-dominated stock. It's not a retail-driven play. As of the end of the 2025 fiscal year, institutional investors-the big mutual funds, pension funds, and asset managers-control a staggering 90.53% of the company's shares outstanding. That level of ownership means their buying and selling dictates the stock's momentum, so you defintely need to know who they are.

The top holders are exactly who you'd expect: the behemoths of the asset management world. These aren't speculative traders; they are long-term index and growth funds that view MTSI as a core holding in the high-performance analog and semiconductor space. The sheer size of these stakes shows conviction in the company's long-term play in markets like 5G, data center, and defense applications. For a deeper dive into the business model, check out the full analysis: MACOM Technology Solutions Holdings, Inc. (MTSI): History, Ownership, Mission, How It Works & Makes Money.

Here's the quick math on the top five institutional players as of the most recent 2025 filings:

The total institutional value held is substantial, sitting at approximately $10.9 billion.

Recent Shifts: Who's Buying and Who's Selling MTSI?

Looking at the recent 13F filings for the 2025 fiscal year, the picture is one of high-velocity rotation, not just passive holding. While overall institutional ownership remains high, some major players have been aggressively adjusting their stakes. This tells you that while the sector narrative is strong, portfolio managers are actively managing risk and opportunity around specific quarterly performance and forward guidance.

The clear signal is that a significant number of institutions are adding to their positions. In the most recent reporting cycle, 259 institutional investors added shares, compared to 138 that decreased their positions. That's a strong accumulation signal.

Key movements from the second quarter of fiscal year 2025 include:

• T. Rowe Price Investment Management, Inc. added a massive 1,501,185 shares, representing a 120.0% increase in their holding.
• Point72 Asset Management L.P. took the opposite tack, removing 1,746,735 shares, a sharp reduction of 62.9%.
• Even smaller moves matter: Strs Ohio boosted its position by 30.9%, acquiring an additional 10,178 shares.

These large, opposing trades show a divergence in short-term strategy. Some funds are locking in gains or reallocating, while others are doubling down on the long-term growth story, especially after the stock price increased by over 22.77% from November 2024 to November 2025.

The Institutional Impact on Stock Strategy and Price

Institutional investors are not just passive bookkeepers; they are the engine driving the stock's valuation and a key influence on corporate strategy. Their collective buying power creates the 'Big Money' inflow that has pushed MTSI shares up significantly-over 31% in the current year.

Their buying is grounded in solid fundamentals, not speculation. The institutional support is a direct endorsement of the company's strong fiscal year 2025 performance, which saw annual revenue of $967 million (a 32% year-over-year rise) and annual per-share earnings (EPS) of $3.47 (a 35% yearly jump). When you see this kind of institutional demand, it's a vote of confidence in two things:

• The Growth Trajectory: They believe MTSI can execute on its strategy to capture market share in high-growth areas like electronic warfare, radar, and next-generation data center connectivity.
• Corporate Governance: Their sheer size gives them a voice. They closely monitor execution on operational targets, like the ongoing improvements at the company's RTP fabrication facility, which is a major catalyst for margin expansion.

So, what's your action? Monitor the next round of 13F filings closely. If the accumulation trend continues, especially from the largest holders like Vanguard and BlackRock, it signals a strong conviction that the stock's current price of around $149.68 (as of November 5, 2025) has more room to run based on the fiscal 2026 outlook.

Key Investors and Their Impact on MACOM Technology Solutions Holdings, Inc. (MTSI)

The investor profile for MACOM Technology Solutions Holdings, Inc. (MTSI) is split into two distinct camps: the controlling insider ownership and the massive, yet mostly passive, institutional giants. The key takeaway is that while institutional money validates the stock's growth story, the company's strategic direction is defintely dictated by its major individual shareholders.

Institutional investors and hedge funds collectively own approximately 76.14% of the company's stock, showing strong confidence in MACOM's exposure to high-growth sectors like AI-driven data centers and high-speed connectivity. But the real power lies with the individuals who founded or have long-standing ties to the firm.

The Dominant Stakeholders: Insider and Passive Giants

The most notable investor isn't a BlackRock or a Vanguard, but rather a major individual shareholder, John L. Ocampo, who holds a staggering 46.53 million shares, representing a controlling 62.55% of the company. This level of insider ownership is unusual for a publicly traded company of this size, and it means he and his related entities essentially steer the ship.

Behind this dominant insider stake are the behemoths of the asset management world-the index funds and mutual fund managers. These are the funds that provide the stock's liquidity and stability, and they hold significant positions as of September 29, 2025:

• Vanguard Group Inc.: 7,067,757 shares (9.49% ownership).
• BlackRock, Inc.: 7,051,486 shares (9.47% ownership).
• FMR LLC (Fidelity): 5,394,809 shares (7.24% ownership).
• T. Rowe Price Group, Inc.: 5,014,260 shares (6.73% ownership).

Here's the quick math: Vanguard and BlackRock alone hold nearly 14.1 million shares. That's a huge vote of confidence in MACOM's long-term play in the semiconductor space.

Investor Influence: Stability Over Activism

The influence of these investors is twofold. The passive institutional holders-Vanguard and BlackRock-are primarily concerned with long-term performance and governance, not activist demands. They own the stock because MACOM Technology Solutions Holdings, Inc. is a key component in major indexes, reflecting the company's strong market capitalization, which was around $12.1 billion as of November 2025.

The real decision-making power rests with the major individual shareholder. This structure means the company is largely insulated from the kind of short-term activist pressure that often plagues firms with more dispersed ownership. You won't see a hedge fund demanding a massive share buyback or a board shakeup here, so the focus remains on execution of the core strategy, which you can read more about in the Mission Statement, Vision, & Core Values of MACOM Technology Solutions Holdings, Inc. (MTSI).

The institutional buying, however, is a critical market signal. For example, following the strong Fiscal Year 2025 results-which saw annual revenue hit $967.3 million and adjusted net income reach $263.4 million-institutional investors responded with significant buying activity, validating the company's improved fundamentals.

Recent Notable Moves: The Insider Sell-Off

The most noteworthy recent activity has been a wave of insider selling by a major shareholder, Susan Ocampo. In late 2025, she executed several large transactions. This is a crucial data point, and you need to look at the numbers precisely:

• Sold 107,376 shares for a value of $15,554,750 on October 27, 2025.
• Sold 43,289 shares for approximately $7.42 million on November 10, 2025.

What this estimate hides is the context: insider selling can be for personal liquidity or diversification, but a sustained pattern is something to monitor closely, even as the company reports record adjusted EPS of $3.47 for FY2025. Another move was by Artisan Small Cap Fund, which saw a temporary share price weakness after MACOM had to assume operational control of an acquired fabrication facility early; they took advantage of this dip to increase their position. That's smart money buying the short-term noise.

The action you should take is clear: track the insider selling, but prioritize the operational performance-especially the continued growth in the Data Center and Industrial & Defense segments, which drove full-year revenue up 32.6% over the prior fiscal year.

Market Impact and Investor Sentiment

You're looking at MACOM Technology Solutions Holdings, Inc. (MTSI) and seeing a stock that's running hot, but you need to know who's driving the bus. The current investor sentiment is a clear 'Moderate Buy' to 'Strong Buy' from the Street, which is a strong signal. But honestly, the picture is more nuanced than a simple rating, especially when you factor in major insider selling.

Institutional investors-the big money like Vanguard Group Inc. and Invesco Ltd.-are the backbone here, owning approximately 76.14% of the company's stock. That level of institutional conviction is what you want to see, as it suggests deep-pocketed players believe in the long-term growth story, particularly in the AI-driven data center and defense markets. This is defintely a stock where the smart money has a large stake.

Recent Market Reactions: The Earnings Jolt and Insider Sell-Off

The market's reaction to MACOM Technology Solutions Holdings' performance has been volatile but largely positive, especially around earnings. The stock surged 14.2% after the company reported its strong fourth-quarter and full-year 2025 earnings in November 2025. This was a direct response to the record fiscal year 2025 revenue of $967 million, which was an increase of over 32% year-over-year, and adjusted EPS of $3.47, up over 35%.

But here's the quick math on the risk side: while institutional buying is strong, a significant insider, 10% owner Susan Ocampo, sold a total of 199,400 shares between November 6 and November 10, 2025, for gross proceeds of over $33 million. This kind of large-scale selling, even by a non-executive, can spook the market, but the stock's overall momentum has largely absorbed it, a testament to the strong underlying fundamentals and analyst support.

A good example of volatility is the stock's reaction to the Q3 2025 results, where it declined despite beating earnings estimates. Investors focused on short-term margin pressures from a recent acquisition and a slower industrial market recovery, proving the market is hyper-sensitive to operational execution risks. You have to watch the margins very closely.

Analyst Perspectives: Why the Price Targets are Rising

The Street's bullish outlook is grounded in MACOM Technology Solutions Holdings' strategic positioning in high-growth, high-value markets. Analysts are consistently raising their price targets, signaling confidence that the company will execute on its growth vectors. The average analyst price target is currently around $171.43, with the high-end reaching $200.00.

The core of the bullish case rests on three pillars:

• Accelerating data center momentum, particularly in 800G and 1.6T interconnects.
• Strong demand in the Industrial & Defense segment, driven by electronic warfare and radar applications.
• Anticipated sequential gross margin improvement of roughly 25-50 basis points per quarter in fiscal year 2026.

To be fair, the main limit analysts point out is the ongoing challenge of achieving sustainable gross margin improvement while ramping up the RTP fabrication facility (fab). This is an execution risk, not a demand problem. For a deeper dive into the company's financial footing, you should check out Breaking Down MACOM Technology Solutions Holdings, Inc. (MTSI) Financial Health: Key Insights for Investors.

Here's a snapshot of the recent analyst moves and the company's fiscal year 2025 performance:

The clear action for you is to monitor the quarterly gross margin progression and the utilization rates at the RTP fab. If those numbers consistently improve in the coming quarters, the analyst price targets will likely be hit, or even exceeded. If onboarding takes 14+ days, churn risk rises.