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Holder clone rankings through .
Of the 15 tracked institutions holding MTSI, 7 have a 3-year clone track record — 7 of them beat the S&P. Average holder's clone alpha: +4.1pt. 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
2.6+15.0%
3.40M shares short · FINRA 2026-09-30
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 | Sep 29, 2026 |
| Gilbert Cisneros | Sell | Sep 21, 2026 |
| Gilbert Cisneros | Sell | Jul 16, 2026 |
| Gilbert Cisneros | Sell |
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.
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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 →
| — |
| 6.4% |
| 2026-08-12 |
SEC Schedule 13D (activist) and 13G (passive) filings for MTSI. Filed when an investor acquires 5%+ ownership.
| May 22, 2026 |
| Gilbert Cisneros | Sell | Mar 27, 2026 |
| Gilbert Cisneros | Buy | Mar 3, 2026 |
| Gilbert Cisneros | Sell | Jan 20, 2026 |
| Gilbert Cisneros | Sell | Nov 13, 2025 |
Showing 8 of 11. STOCK Act disclosures lag up to 45 days.
Last Close
$236.24
2026-10-23
YTD
+35.0%
37% of 52-week range