MACOM Technology Solutions Holdings, Inc. (MTSI) Ownership
MTSI ownership summary
as of October 18, 2026- Institutions
- 97.5% of shares outstanding
- Insiders
- 6.55% of shares outstanding
- Shares outstanding
- 76.4M
- Float
- 71.3M shares available to trade
- Short interest
- 5.00% 3.4M shares short
- Days to cover
- 2.65 short interest up 15.0% vs prior month
- Institutions 97.48%
- Insiders 6.55%
MTSI top institutional holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | FMR Inc | 13.78% | 10.5M | $2.76B | −83,296 (−0.8%) | June 30, 2026 |
| 2 | BlackRock Inc | 12.46% | 9.5M | $2.49B | +946,616 (+11.1%) | June 30, 2026 |
| 3 | Vanguard Portfolio Management, LLC | 4.72% | 3.6M | $945.5M | +18,243 (+0.5%) | June 30, 2026 |
| 4 | Vanguard Capital Management, LLC | 4.01% | 3.1M | $803.7M | +71,832 (+2.4%) | June 30, 2026 |
| 5 | T. Rowe Price Investment Management,Inc. | 3.73% | 2.9M | $747.4M | −1.6M (−36.5%) | June 30, 2026 |
| 6 | State Street Corp | 2.96% | 2.3M | $593.3M | +109,491 (+5.1%) | June 30, 2026 |
| 7 | Amvescap Plc. | 2.81% | 2.1M | $563.7M | −1.5M (−41.5%) | June 30, 2026 |
| 8 | JPMorgan Chase & Co | 2.78% | 2.1M | $557.3M | +109,461 (+5.4%) | June 30, 2026 |
| 9 | Geode Capital Management, LLC | 1.85% | 1.4M | $369.7M | +50,207 (+3.7%) | June 30, 2026 |
| 10 | Wellington Management Company LLP | 1.58% | 1.2M | $316.2M | −342,324 (−22.1%) | June 30, 2026 |
| 11 | Massachusetts Financial Services Company | 1.53% | 1.2M | $305.8M | +337,794 (+40.8%) | June 30, 2026 |
| 12 | Capital Research Global Investors | 1.42% | 1.1M | $284.8M | −136,523 (−11.2%) | June 30, 2026 |
| 13 | NORGES BANK | 1.31% | 997K | $261.4M | +428,088 (+75.3%) | June 30, 2026 |
| 14 | Whale Rock Capital Management LLC | 1.29% | 989K | $259.3M | −186,206 (−15.8%) | June 30, 2026 |
| 15 | T. Rowe Price Associates, Inc. | 1.28% | 980K | $257.0M | +65,284 (+7.1%) | June 30, 2026 |
| 16 | Neuberger Berman Group LLC | 1.08% | 827K | $216.9M | +38,150 (+4.8%) | June 30, 2026 |
| 17 | The Goldman Sachs Group Inc | 1.06% | 812K | $213.0M | +381,621 (+88.6%) | June 30, 2026 |
| 18 | Franklin Templeton Inc | 1.05% | 799K | $209.5M | +296,922 (+59.2%) | June 30, 2026 |
| 19 | Qube Research & Technologies | 1.04% | 791K | $207.3M | +790,678 (0.0%) | June 30, 2026 |
| 20 | HHG PLC | 1.03% | 784K | $205.6M | +105,032 (+15.5%) | March 31, 2026 |
Value at the latest close. Change = shares bought or sold in the latest quarterly filing (13F). In the top 20, 14 holders added 3.7M shares and 6 cut 3.9M.
MTSI top mutual fund and ETF holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | Fidelity Select Semiconductors | 4.89% | 3.7M | $979.4M | −85,100 (−2.2%) | August 31, 2026 |
| 2 | iShares Core S&P Mid-Cap ETF | 3.24% | 2.5M | $649.2M | −888 (−0.0%) | September 30, 2026 |
| 3 | Vanguard MStar Total Stk Mkt Idx Invest | 2.86% | 2.2M | $572.1M | −4,980 (−0.2%) | August 31, 2026 |
| 4 | iShares Semiconductor ETF | 2.20% | 1.7M | $441.6M | −16,966 (−1.0%) | September 30, 2026 |
| 5 | Vanguard Small Cap Index | 2.14% | 1.6M | $428.2M | +52,893 (+3.3%) | September 30, 2026 |
| 6 | T. Rowe Price Mid-Cap Growth | 1.50% | 1.1M | $300.3M | — | September 30, 2026 |
| 7 | Vanguard MStar Small Cap Growth Indx Inv | 1.19% | 909K | $238.3M | +1,994 (+0.2%) | September 30, 2026 |
| 8 | American Funds SMALLCAP World A | 1.08% | 826K | $216.5M | −231,657 (−21.9%) | September 30, 2026 |
| 9 | Fidelity OTC | 1.07% | 818K | $214.4M | −41,100 (−4.8%) | August 31, 2026 |
| 10 | Vanguard Explorer Inv | 1.07% | 815K | $213.7M | −38,073 (−4.5%) | June 30, 2026 |
| 11 | iShares A.I. Innovation and Tech Act ETF | 0.92% | 706K | $185.1M | — | September 30, 2026 |
| 12 | Vanguard Information Technology ETF | 0.86% | 659K | $172.9M | +1,518 (+0.2%) | September 30, 2026 |
| 13 | Direxion Daily Semicondct Bull 3X ETF | 0.77% | 587K | $153.8M | −3,542 (−0.6%) | September 30, 2026 |
| 14 | Fidelity Advisor Semiconductors I | 0.77% | 584K | $153.3M | −8,300 (−1.4%) | August 31, 2026 |
| 15 | State Street® SPDR® S&P MIDCAP 400® ETF | 0.67% | 514K | $134.8M | +34,015 (+7.1%) | September 30, 2026 |
| 16 | Fidelity Select Technology | 0.56% | 427K | $112.0M | +427,100 (0.0%) | August 31, 2026 |
| 17 | MFS Mid Cap Growth A | 0.56% | 426K | $111.7M | −74,926 (−15.0%) | August 31, 2026 |
| 18 | Fidelity Blue Chip Growth | 0.54% | 414K | $108.5M | — | August 31, 2026 |
| 19 | Franklin Technology A Acc USD | 0.53% | 405K | $106.2M | — | August 31, 2026 |
| 20 | iShares S&P Mid-Cap 400 Growth ETF | 0.53% | 401K | $105.2M | −428 (−0.1%) | September 30, 2026 |
Funds report holdings monthly or quarterly; dates differ by fund.
MTSI insider transactions
latest 20| Date | Name | Transaction | Price | Shares | Value |
|---|---|---|---|---|---|
| 2026-03-27 | Gilbert Ray Cisneros, Jr. | Sell | $225.44 | — | — |
| 2026-03-03 | Gilbert Ray Cisneros, Jr. | Buy | $241.01 | — | — |
| 2026-02-26 | Robert Dennehy | Sell | $245.25 | 18,398 | $4.5M |
| 2026-02-25 | Geoffrey G Ribar | Sell | $253.59 | 2,244 | $569,056 |
| 2026-02-25 | John Ritchie | Sell | $255.00 | 1,573 | $401,115 |
| 2026-02-25 | Susan Ocampo | Sell | $254.43 | 261,763 | $66.6M |
| 2026-02-24 | Susan Ocampo | Sell | $250.08 | 53,509 | $13.4M |
| 2026-02-18 | Susan Ocampo | Sell | $250.00 | 3,156 | $789,000 |
| 2026-02-17 | John Kober | Sell | $243.07 | 7,196 | $1.7M |
| 2026-02-17 | Susan Ocampo | Sell | $245.32 | 80,123 | $19.7M |
| 2026-02-13 | Susan Ocampo | Sell | $241.85 | 62,050 | $15.0M |
| 2026-02-12 | Susan Ocampo | Sell | $240.32 | 57,827 | $13.9M |
| 2026-02-06 | Susan Ocampo | Sell | $235.85 | 100,000 | $23.6M |
| 2026-02-03 | Susan Ocampo | Sell | $230.29 | 100,000 | $23.0M |
| 2026-02-02 | Donghyun Thomas Hwang | Sell | $226.06 | 5,274 | $1.2M |
| 2026-01-20 | Gilbert Ray Cisneros, Jr. | Sell | $221.70 | — | — |
| 2025-12-09 | Susan Ocampo | Sell | $190.07 | 121,067 | $23.0M |
| 2025-12-05 | Susan Ocampo | Sell | $190.10 | 76,642 | $14.6M |
| 2025-12-04 | Donghyun Thomas Hwang | Sell | $185.63 | 4,372 | $811,574 |
| 2025-12-04 | Susan Ocampo | Sell | $190.00 | 2,291 | $435,290 |
Reported trades by company officers, directors and other filers (including disclosures by members of Congress where EODHD lists them). "—" where the filing gives no share count.
MTSI shares outstanding
Year-end shares outstanding, adjusted for splits.
Who owns MTSI
Institutional investors own 97.5% of MACOM Technology Solutions's shares and insiders 6.55%. The largest holder is FMR Inc with 13.78% of the shares (10.5M), as of June 30, 2026. Among the top 20 institutions, 14 added shares and 6 reduced their stake in the latest filings. Short interest is 5.00% of the float, or 2.65 days of average trading volume. The share count rose 61.2% since 2014.
Related: MTSI analyst forecast, MTSI key metrics. See the MTSI stock overview for the latest quote and news.
MTSI ownership FAQ
Who owns the most MACOM Technology Solutions stock?
The largest shareholders of MACOM Technology Solutions are FMR Inc (13.78%), BlackRock Inc (12.46%), Vanguard Portfolio Management, LLC (4.72%), Vanguard Capital Management, LLC (4.01%), T. Rowe Price Investment Management,Inc. (3.73%).
What percentage of MACOM Technology Solutions is owned by institutions?
Institutions hold 97.5% of MACOM Technology Solutions's shares outstanding; insiders hold 6.55%.
Which funds own MACOM Technology Solutions?
The largest fund holders of MACOM Technology Solutions are Fidelity Select Semiconductors (4.89%), iShares Core S&P Mid-Cap ETF (3.24%), Vanguard MStar Total Stk Mkt Idx Invest (2.86%), iShares Semiconductor ETF (2.20%), Vanguard Small Cap Index (2.14%).
What is MACOM Technology Solutions's short interest?
3.4M shares of MACOM Technology Solutions were sold short, 5.00% of the float; at the average daily volume it would take 2.65 days to cover.
Are insiders buying or selling MACOM Technology Solutions?
Of the latest 20 reported insider transactions in MACOM Technology Solutions (since December 4, 2025), 1 were purchases and 19 were sales.
How many shares of MACOM Technology Solutions are outstanding?
MACOM Technology Solutions has 76.4M shares outstanding, of which 71.3M are in the public float.