Ranked by reported Q1 2026 13F market value
Share of total reported institutional value in MTZ held by the largest 10 / 25 filers.
| # | Institution | Shares Held | Market Value | QoQ Change | Ownership % | % of Fund |
|---|---|---|---|---|---|---|
| 1 | BlackRock, Inc. | 7.3M | $2.35B | +2.8% | 9.273% | 0.04% |
| 2 | PECONIC PARTNERS LLC | 3.6M | $1.15B | +123.6% | 4.540% | 19.92% |
| 3 | VANGUARD CAPITAL MANAGEMENT LLC | 2.8M | $902.3M | β | 3.558% | 0.02% |
| 4 | VANGUARD PORTFOLIO MANAGEMENT LLC | 2.8M | $891.2M | β | 3.514% | 0.05% |
| 5 | Hill City Capital, LP | 2.2M | $693.3M | 0.0% | 2.734% | 24.77% |
| 6 | STATE STREET CORP | 1.9M | $601.6M | +2.4% | 2.372% | 0.02% |
| 7 | VICTORY CAPITAL MANAGEMENT INC | 1.6M | $512.4M | -39.6% | 2.020% | 0.33% |
| 8 | LONE PINE CAPITAL LLC | 1.5M | $492.6M | β | 1.942% | 3.93% |
| 9 | FIRST TRUST ADVISORS LP | 1.4M | $454.2M | +7.6% | 1.791% | 0.32% |
| 10 | GEODE CAPITAL MANAGEMENT, LLC | 1.4M | $441.5M | +12.4% | 1.740% | 0.03% |
| 11 | BANK OF AMERICA CORP /DE/ | 1.3M | $427.9M | +6.0% | 1.687% | 0.03% |
| 12 | Hood River Capital Management LLC | 1.3M | $416.8M | -12.7% | 1.643% | 4.18% |
| 13 | Invesco Ltd. | 1.2M | $394.4M | -19.4% | 1.555% | 0.06% |
| 14 | DIMENSIONAL FUND ADVISORS LP | 732K | $235.3M | -16.0% | 0.928% | 0.05% |
| 15 | Electron Capital Partners, LLC | 713K | $229.4M | -11.3% | 0.904% | 10.34% |
| 16 | NORDEA INVESTMENT MANAGEMENT AB | 734K | $228.8M | -36.2% | 0.931% | 0.21% |
| 17 | Bank of New York Mellon Corp | 656K | $211.1M | +3.1% | 0.832% | 0.04% |
| 18 | AQR CAPITAL MANAGEMENT LLC | 660K | $209.5M | -9.7% | 0.837% | 0.10% |
| 19 | CANADA PENSION PLAN INVESTMENT BOARD | 639K | $205.6M | +325.6% | 0.811% | 0.13% |
| 20 | FMR LLC | 628K | $202.0M | -5.5% | 0.796% | 0.01% |
| 21 | MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | 605K | $194.5M | +8.4% | 0.767% | 0.26% |
| 22 | MORGAN STANLEY | 587K | $188.8M | +19.8% | 0.744% | 0.01% |
| 23 | COATUE MANAGEMENT LLC | 584K | $187.8M | -13.9% | 0.740% | 0.65% |
| 24 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 511K | $164.5M | +1.8% | 0.649% | 0.03% |
| 25 | MILLENNIUM MANAGEMENT LLC | 504K | $162.2M | -31.2% | 0.639% | 0.11% |
denotes a marquee investor (Buffett, Burry, ARK, Tiger Global, Pershing Square, Baupost and other widely-followed managers). β% of Fundβ shows how much of that investorβs total 13F portfolio is invested in MTZ β a direct measure of their conviction.
Filings activity in MTZ during Q1 2026, grouped by how each filer changed its position.
Institutions that opened a new MTZ position in Q1 2026
Institutions that fully closed their MTZ position in Q1 2026
8 quarters of 13F filings Β· Ξ columns show change vs prior quarter
| Quarter | Inst. Holders | Ξ Holders | Ownership % | Ξ Ownership | Total 13F Value | Ξ Value |
|---|---|---|---|---|---|---|
| Q1 2026 | 783 | +16% | 64.00% | +20.70 pp | $18.31B | +48% |
| Q4 2025 | 676 | +8.9% | 43.30% | +2.57 pp | $12.39B | +6.3% |
| Q3 2025 | 621 | +7.4% | 40.73% | +9.13 pp | $11.65B | +29% |
| Q2 2025 | 578 | +14% | 31.60% | +9.87 pp | $9.04B | +45% |
| Q1 2025 | 509 | 1.4% | 21.73% | 3.81 pp | $6.22B | 15% |
| Q4 2024 | 516 | +14% | 25.54% | +1.92 pp | $7.31B | +8.1% |
| Q3 2024 | 453 | +8.6% | 23.62% | +3.05 pp | $6.76B | +15% |
| Q2 2024 | 417 | β | 20.57% | β | $5.89B | β |
Source: SEC 13F institutional filings. Ownership % requires market cap data and will show once linked. Ξ columns compare to the immediately prior filed quarter.
Quick answers to the most common questions about buying MTZ stock.
Based on Q1 2026 13F filings, institutional ownership of MasTec, Inc. stands at 64.0%, held across 783 reporting institutions.
BlackRock, Inc. is the largest reported institutional holder of MTZ, with approximately 7,309,609 shares worth $2.35B as of Q1 2026.
Yes β 3 widely-followed marquee investors appear among the top 25 institutional holders of MTZ, including LONE PINE CAPITAL LLC, COATUE MANAGEMENT LLC, MILLENNIUM MANAGEMENT LLC.
Our composite Smart Money Score for MTZ is 85 out of 100 (Strong Smart Money). It combines net institutional buying activity, ownership shift, marquee investor presence, and holder-count growth.
187 institutions opened new positions in MTZ during Q1 2026, while 80 fully exited. 513 added to existing positions and 79 trimmed.
MTZ institutional ownership rose by 20.70 percentage points quarter-over-quarter, with a net change of +107 holders.
The top 10 institutions account for 46.4% of all reported 13F value in MTZ, and the top 25 account for 66.4%.
All data is sourced from SEC Form 13F filings, which institutional investment managers with at least $100M in assets are required to file each quarter. We process every 13F filing from EDGAR and recompute the aggregates after each cycle. Insider transactions are sourced from Form 4 filings.
MasTec, Inc. (MTZ) Institutional Ownership