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Of the 15 tracked institutions holding MTSI, 9 have a 3-year clone track record — 9 of them beat the S&P. Average holder's clone alpha: +6.6pt. It's a gauge of who owns the name, not just how many.
Among the 15 tracked institutional investors we monitor, MTSI (MACOM TECH SOLUTIONS HLDGS I) is held with a combined value of $11.70B across 34,737,990 shares. The largest holder is FMR LLC with a position worth $4.00B (0.17% of their portfolio). MAVERICK CAPITAL LTD opened a new position in the most recent quarter. 8 funds increased their holdings. 6 funds reduced their position.
Total Institutional Value
$11.70B
Total Shares Held
34,737,990
Institutional Holders
15
% of Shares Outstanding
45.5%
of 76.37M shares · SEC 2026-08-03
Days to Cover
1.6-3.2%
2.43M shares short · FINRA 2026-08-14
Tracked 13F institutions hold 45.5% of MTSI's shares outstanding. This is a floor: 13F filings arrive on a ~45-day lag and we track only a subset of institutional filers, so true institutional ownership is higher. Shares-outstanding is the latest SEC cover-page figure (as of 2026-08-03), not a live float.
Ranked by estimated dollars moved (share change × implied price). 13F data lags up to 45 days.
| # | Fund | Value↓ | Portfolio % | Change |
|---|---|---|---|---|
| 1 | FMR LLC | $4.00B | 0.17% | -0.8% |
| 2 | BlackRock, Inc. | $3.62B | 0.05% | +11.1% |
| 3 | VANGUARD GROUP INC | $1.24B | 0.02% | +2.2% |
| 4 | STATE STREET CORP | $860.49M | 0.03% | +5.1% |
| 5 | WELLINGTON MANAGEMENT GROUP LLP | $458.62M | 0.08% | -22.1% |
| 6 | Capital Research Global Investors | $413.14M | 0.06% | -11.2% |
| 7 | Whale Rock Capital Management LLC | $376.10M | 3.02% | -15.8% |
| 8 | PRICE T ROWE ASSOCIATES INC /MD/ | $372.81M | 0.04% | +7.1% |
| 9 | MILLENNIUM MANAGEMENT LLC | $163.71M | 0.11% | +28.4% |
| 10 | AQR CAPITAL MANAGEMENT LLC | $88.01M | 0.03% | +10.3% |
| Member | Type | Date |
|---|---|---|
| Gilbert Cisneros | Sell | Jul 16, 2026 |
| Gilbert Cisneros | Sell | May 22, 2026 |
| Gilbert Cisneros | Sell | Mar 27, 2026 |
| Gilbert Cisneros | Buy |
As of the latest SEC 13F filings, FMR LLC is the largest institutional holder of MTSI with a position worth $4.00B, representing 0.17% of their portfolio. In total, 15 institutional investors hold MTSI with a combined value of $11.70B.
In the most recent quarter, 1 fund opened a new position in MTSI. Additionally, 8 increased their holdings and 6 reduced their positions.
Institutional investors hold $11.70B worth of MTSI stock across 15 positions. The largest institutional holder is FMR LLC with $4.00B in holdings.
A 13F filing is a quarterly report required by the SEC from institutional investment managers with over $100 million in assets. It discloses their holdings in U.S. equities. For MTSI, these filings reveal which major funds are accumulating or reducing positions, providing insights into institutional sentiment.
Get notified when hedge funds change their MTSI positions.
Alpha = the manager's 3-year clone return minus the S&P 500. A skilled roster is a stronger tell than a crowded one — though even skilled managers' edge doesn't reliably survive the 13F disclosure lag. Why →
| 2026-08-12 |
SEC Schedule 13D (activist) and 13G (passive) filings for MTSI. Filed when an investor acquires 5%+ ownership.
| Mar 3, 2026 |
| Gilbert Cisneros | Sell | Jan 20, 2026 |
| Gilbert Cisneros | Sell | Nov 13, 2025 |
| Josh Gottheimer | Sell | Apr 9, 2025 |
| Rob Bresnahan | Buy | Feb 10, 2025 |
Showing 8 of 9. STOCK Act disclosures lag up to 45 days.
Last Close
$274.80
2026-09-08
YTD
+57.1%
53% of 52-week range
