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Of the 17 tracked institutions holding MTZ, 10 have a 3-year clone track record — 7 of them beat the S&P. Average holder's clone alpha: +2.7pt. It's a gauge of who owns the name, not just how many.
Among the 17 tracked institutional investors we monitor, MTZ (MASTEC INC) is held with a combined value of $7.22B across 20,208,050 shares. The largest holder is BlackRock, Inc. with a position worth $3.18B (0.05% of their portfolio). 2 funds opened new positions in the most recent quarter. 6 funds increased their holdings. 9 funds reduced their position.
Total Institutional Value
$7.22B
Total Shares Held
20,208,050
Institutional Holders
17
% of Shares Outstanding
25.2%
of 80.30M shares · SEC 2026-07-27
Days to Cover
3.2+18.7%
5.25M shares short · FINRA 2026-08-14
Tracked 13F institutions hold 25.2% of MTZ'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 2026-07-27), 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 | BlackRock, Inc. | $3.18B | 0.05% | +4.5% |
| 2 | VANGUARD GROUP INC | $1.29B | 0.02% | -1.2% |
| 3 | STATE STREET CORP | $933.96M | 0.03% | +20.1% |
| 4 | LONE PINE CAPITAL LLC | $559.67M | 3.42% | -12.1% |
| 5 | FMR LLC | $370.34M | 0.02% | +41.8% |
| 6 | AQR CAPITAL MANAGEMENT LLC | $273.60M | 0.10% | -0.4% |
| 7 | COATUE MANAGEMENT LLC | $215.21M | 0.44% | -11.4% |
| 8 | Third Point LLC | $120.66M | 2.59% | -9.4% |
| 9 | PRICE T ROWE ASSOCIATES INC /MD/ | $117.51M | 0.01% | +364.5% |
| 10 | Point72 Asset Management, L.P. | $65.03M | 0.10% | -63.9% |
| Member | Type | Date |
|---|---|---|
| Markwayne Mullin | Sell | Feb 4, 2026 |
| Markwayne Mullin | Sell | Dec 18, 2025 |
| Lisa McClain | Sell | Oct 31, 2025 |
| Lisa McClain | Sell |
As of the latest SEC 13F filings, BlackRock, Inc. is the largest institutional holder of MTZ with a position worth $3.18B, representing 0.05% of their portfolio. In total, 17 institutional investors hold MTZ with a combined value of $7.22B.
In the most recent quarter, 2 funds opened a new position in MTZ. Additionally, 6 increased their holdings and 9 reduced their positions.
Institutional investors hold $7.22B worth of MTZ stock across 17 positions. The largest institutional holder is BlackRock, Inc. with $3.18B 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 MTZ, these filings reveal which major funds are accumulating or reducing positions, providing insights into institutional sentiment.
Get notified when hedge funds change their MTZ 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 →
| 2026-08-13 |
| 8.1% | 2026-07-29 |
SEC Schedule 13D (activist) and 13G (passive) filings for MTZ. Filed when an investor acquires 5%+ ownership.
| Oct 30, 2025 |
| Lisa McClain | Buy | Oct 30, 2025 |
| Lisa McClain | Buy | Jun 11, 2025 |
| Markwayne Mullin | Buy | Feb 3, 2025 |
| Markwayne Mullin | Buy | Jan 2, 2025 |
Last Close
$240.68
2026-09-09
YTD
+5.7%
25% of 52-week range