13D·WATCH Activist + Insider Intelligence Live feed Blog About Pricing
ISSUER PROFILE · CIK 0000015615 · CUSIP 576323109

MasTec, Inc.MTZ

3 13D/G filings 2 distinct filers 0 insider transactions (365d)

Post-Filing Returns · across 1 activist filings on this issuer

Median 30d
0.0%
avg 0.0%
Median 60d
0.0%
avg 0.0%
Median 90d
0.0%
avg 0.0%
Median 180d
0.0%
avg 0.0%

Returns measured from each activist filing's date_of_event, split + dividend adjusted via Yahoo Finance.

Cross-Reference Snapshot

Activist filings
3
2 SCHEDULE 13D/A · 1 SCHEDULE
Distinct filers
2
multi-activist cluster
Insiders (365d)
0
0 buys · 0 sales
Latest short DTC
3.61
as of 2026-08-31

Institutional Consensus · 2026-06-30

Held by elite portfolio managers
4 holders · $840.41M
Lone Pine CapitalPoint72 Asset MgmtSoros Fund ManagementThird Point

13D/G Filings Timeline · 3 total

FiledFormFilerStakeSharesIntent
2026-08-13 SCHEDULE 13D/A MAS JORGE 11,872,111 view →
2026-08-13 SCHEDULE 13D/A MAS JOSE RAMON 6,185,090 view →
2025-08-22 SCHEDULE MAS JORGE 15.00% 11,872,231 view →

FINRA Short Interest History

SettlementShort InterestDays to Cover% Δ vs prior
2026-08-31 5,309,659 3.61 +1.1%
2026-08-14 5,253,497 3.23 +18.7%
2026-07-31 4,427,169 2.67 +4.5%
2026-07-15 4,236,441 4.25 -3.8%
2026-06-30 4,404,328 3.20 +19.6%
2026-06-15 3,682,003 3.53 +10.5%
2026-05-29 3,333,421 2.36 +3.0%
2026-05-15 3,236,026 2.89 +4.1%
2026-04-30 3,107,809 3.66 +3.1%
2026-04-15 3,014,187 4.59 +6.3%
2026-03-31 2,834,389 2.67 +10.5%
2026-03-13 2,564,253 2.35 -0.2%

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