MACOM Technology Solutions Holdings
MTSI · NASDAQ
Who owns MTSI
Largest institutional holders, from their latest 13F filings
The 10 largest institutions hold 51.1% of MTSI’s shares.
- Fidelity Management & Research Company LLC13.0%
- BlackRock Institutional Trust Company, N.A.11.1%
- Ocampo (Susan)6.4%
- Vanguard Portfolio Management, LLC4.7%
- Next 6 largest institutions15.9%
- All other shareholders48.9%
| Holder | Shares | % of shares |
|---|---|---|
| Fidelity Management & Research Company LLC | 9.95M | 13.04% |
| BlackRock Institutional Trust Company, N.A. | 8.44M | 11.06% |
| Ocampo (Susan) | 4.88M | 6.40% |
| Vanguard Portfolio Management, LLC | 3.61M | 4.73% |
| Vanguard Capital Management, LLC | 3.06M | 4.02% |
| T. Rowe Price Investment Management, Inc. | 2.85M | 3.74% |
| State Street Investment Management (US) | 2.26M | 2.96% |
| Geode Capital Management, L.L.C. | 1.41M | 1.85% |
| JP Morgan Asset Management | 1.29M | 1.69% |
| Invesco Advisers, Inc. | 1.24M | 1.63% |
Largest mutual fund holders
| Holder | Shares | % of shares |
|---|---|---|
| Fidelity Select Semiconductors Portfolio | 3.82M | 5.01% |
| iShares Core S&P Mid-Cap ETF | 2.30M | 3.01% |
| Vanguard Total Stock Market Index Fund | 2.19M | 2.87% |
| iShares Semiconductor ETF | 1.62M | 2.12% |
| Vanguard Small-Cap Index Fund | 1.58M | 2.07% |
Insider trades
Form 4 filings by officers, directors and large holders
Over the last 6 months, insiders sold $30.43M (65 trades) of MTSI on the open market, with no buys.
| Insider | Type | Shares | Value |
|---|---|---|---|
| Roth Ambra R. | Sale | 653 | $195.90K |
| Dennehy Robert | Sale | 252 | $69.35K |
| Kober John | Sale | 400 | $132.27K |
| Kober John | Sale | 300 | $98.92K |
| Kober John | Sale | 1.60K | $526.05K |
| Kober John | Sale | 1.70K | $556.90K |
| Kober John | Sale | 500 | $163.26K |
| Kober John | Sale | 900 | $292.73K |
| Kober John | Sale | 400 | $129.59K |
| Kober John | Sale | 1.59K | $509.71K |
Congressional trades
Disclosed by members of Congress over the last 12 months
| Member | Type | Amount | Traded |
|---|---|---|---|
| Gilbert CisnerosHouse | Sale | $15K–$50K | Sep 29, 2026 |
| Gilbert CisnerosHouse | Sale | $1K–$15K | Sep 21, 2026 |
| Gil CisnerosHouse | Sale | $1K–$15K | Jan 20, 2026 |
| Gil CisnerosHouse | Sale | $1K–$15K | Nov 13, 2025 |
Short interest
Settled Sep 30, 2026
- Shares short
- 3.40M
- Days to cover
- 2.62
- % of shares outstanding
- 4.46%
- Average daily volume
- 1.30M
- Change since last report
- +15.0%
Information on this page is provided for informational purposes only and is not a recommendation to buy, sell or hold any security. Investing involves risk, including possible loss of principal. Market data is delayed at least 15 minutes and is provided without warranty. Analyst ratings, price targets and company data come from third-party sources. Past performance does not guarantee future results.