MACOM Technology Solutions Holdings, Inc.
Ownership
Ownership Structure
Who owns MACOM Technology Solutions Holdings, Inc. (MTSI)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 93.3% of the shares are freely tradable; institutional investors hold 99.6%.
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| FMR Inc | 13.89 | 10,610,440 | +63.7 | 03/31/2026 |
| BlackRock Inc | 11.22 | 8,566,283 | +13.8 | 03/31/2026 |
| T. Rowe Price Investment Management,Inc. | 5.87 | 4,486,082 | -45.5 | 03/31/2026 |
| Amvescap Plc. | 4.81 | 3,673,815 | +7.3 | 03/31/2026 |
| Vanguard Portfolio Management, LLC | 4.70 | 3,587,081 | +0.0 | 03/31/2026 |
| Vanguard Capital Management, LLC | 3.92 | 2,992,851 | +0.0 | 03/31/2026 |
| State Street Corp | 2.82 | 2,152,751 | +1.6 | 03/31/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Fidelity Select Semiconductors | 5.00 | 3,819,964 | -0.4 | 07/31/2026 |
| iShares Core S&P Mid-Cap ETF | 3.01 | 2,297,742 | +0.0 | 08/31/2026 |
| Vanguard MStar Total Stk Mkt Idx Invest | 2.86 | 2,186,435 | +0.3 | 07/31/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Insider holdings
| Person | Role | Shares | Value | As of | Type |
|---|---|---|---|---|---|
| Kober John | Senior VP and CFO | 33,983 | 9,375,910 $ | Aug 17, 2026 | direct |
| Dennehy Robert | Senior VP and COO | 12,758 | 3,519,932 $ | Aug 28, 2026 | direct |
Holdings as of each person's most recent SEC Form 4 filing — excluding options and RSUs, which are not shares yet. Holdings may have changed between two filings.
Insiders
Insider Transactions
| Date | Person | Role | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Aug 28, 2026 | Dennehy Robert | Senior VP and COO | Sell | 252 | 275.20 | 69,350 |
| Aug 17, 2026 | Kober John | Senior VP and CFO | Sell | 300 | 329.75 | 98,925 |
| Aug 17, 2026 | Kober John | Senior VP and CFO | Sell | 1,600 | 328.78 | 526,048 |
| Aug 17, 2026 | Kober John | Senior VP and CFO | Sell | 1,699 | 327.78 | 556,898 |
| Aug 17, 2026 | Kober John | Senior VP and CFO | Sell | 500 | 326.51 | 163,255 |
| Aug 17, 2026 | Kober John | Senior VP and CFO | Sell | 900 | 325.26 | 292,734 |
| Aug 17, 2026 | Kober John | Senior VP and CFO | Sell | 400 | 330.67 | 132,268 |
| Aug 17, 2026 | Kober John | Senior VP and CFO | Sell | 1,590 | 320.57 | 509,706 |
Reportable transactions by officers and major shareholders from SEC Form 4 filings. "Other" includes things like stock grants and option exercises without a buy/sell character. View all insider transactions →
Data as of: September 18, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.