The public view is the crawlable proof. The same sourced dataset is available through REST and MCP for agents, research scripts, and back-office tools.
| Date | Insider | Role | Action | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Aug 14, 2026 | Spiro Alex | Director | Grant(A) | 139 | — | $0 |
| Aug 14, 2026 | Dwyer Robert J | Director | Tax withholding(F) | 31 | $297.59 | $9K |
| Aug 14, 2026 | Dwyer Robert J | Director | Grant(A) | 139 | — | $0 |
| Aug 14, 2026 | Campbell C Robert | Director | Grant(A) | 139 | — | $0 |
| Aug 14, 2026 | Csiszar Ernst N | Director | Tax withholding(F) | 34 | $297.59 | $10K |
| Aug 14, 2026 | Csiszar Ernst N | Director | Grant(A) | 152 | — | $0 |
| Aug 14, 2026 | Miranda Manuel Benito | Director | Grant(A) | 152 | — | $0 |
| Aug 14, 2026 | Palomarez Javier Alberto | Director | Tax withholding(F) | 31 | $297.59 | $9K |
| Aug 14, 2026 | Palomarez Javier Alberto | Director | Grant(A) | 139 | — | $0 |
| Aug 14, 2026 | Parker Ava L | Director | Tax withholding(F) | 20 | $297.59 | $6K |
| Aug 14, 2026 | Parker Ava L | Director | Grant(A) | 177 | — | $0 |
| Aug 14, 2026 | Johnson Julia L | Director | Grant(A) | 139 | — | $0 |
| Aug 11, 2026 | Mas Jorge | Director | Other(J) | 1.1M | — | — |
| Aug 11, 2026 | Mas Jorge | Director | Other(J) | 1.1M | — | — |
| Aug 11, 2026 | Mas Jose Ramon | CEO, Director | Other(J) | 341K | — | — |
| Aug 11, 2026 | Mas Jose Ramon | CEO, Director | Other(J) | 341K | — | — |
| Jun 3, 2026 | Csiszar Ernst N | Director | Sell(S) | 7K | $371.17 | $2.4M |
| May 15, 2026 | Campbell C Robert | Director | Grant(A) | 95 | — | $0 |
| May 15, 2026 | Dwyer Robert J | Director | Grant(A) | 95 | — | $0 |
| May 15, 2026 | Dwyer Robert J | Director | Tax withholding(F) | 21 | $434.77 | $9K |
| May 15, 2026 | Csiszar Ernst N | Director | Grant(A) | 104 | — | $0 |
| May 15, 2026 | Csiszar Ernst N | Director | Tax withholding(F) | 23 | $434.77 | $10K |
| May 15, 2026 | Johnson Julia L | Director | Grant(A) | 95 | — | $0 |
| May 15, 2026 | Palomarez Javier Alberto | Director | Grant(A) | 95 | — | $0 |
| May 15, 2026 | Palomarez Javier Alberto | Director | Tax withholding(F) | 21 | $434.77 | $9K |
| May 15, 2026 | Parker Ava L | Director | Grant(A) | 121 | — | $0 |
| May 15, 2026 | Parker Ava L | Director | Tax withholding(F) | 14 | $434.77 | $6K |
| May 4, 2026 | Campbell C Robert | Director | Sell(S) | 3K | $417.00 | $1.3M |
| Mar 25, 2026 | Palomarez Javier Alberto | Director | Sell(S) | 950 | $325.43 | $309K |
| Mar 18, 2026 | Mas Jose Ramon | CEO, Director | Grant(A) | 26K | — | $0 |
| Mar 18, 2026 | Mas Jorge | Director | Grant(A) | 16K | — | $0 |
| Mar 18, 2026 | de Cardenas Alberto | EVP, General Counsel | Grant(A) | 6K | — | $0 |
| Mar 18, 2026 | Apple Robert E | COO | Grant(A) | 12K | — | $0 |
| Mar 18, 2026 | DiMarco Paul | CFO | Grant(A) | 9K | — | $0 |
| Mar 17, 2026 | Love Timothy Michael | CAO | Grant(A) | 492 | — | $0 |
| Mar 10, 2026 | de Cardenas Alberto | EVP, General Counsel | Tax withholding(F) | 5K | $297.81 | $1.4M |
| Mar 10, 2026 | Apple Robert E | COO | Tax withholding(F) | 12K | $297.81 | $3.6M |
| Mar 10, 2026 | Mas Jose Ramon | CEO, Director | Tax withholding(F) | 28K | $297.81 | $8.4M |
| Mar 10, 2026 | Mas Jorge | Director | Tax withholding(F) | 16K | $297.81 | $4.8M |
| Mar 3, 2026 | Csiszar Ernst N | Director | Sell(S) | 7K | $300.40 | $2.0M |
| Feb 13, 2026 | Parker Ava L | Director | Tax withholding(F) | 22 | $269.53 | $6K |
| Feb 13, 2026 | Parker Ava L | Director | Grant(A) | 195 | — | $0 |
| Feb 13, 2026 | Campbell C Robert | Director | Grant(A) | 154 | — | $0 |
| Feb 13, 2026 | Csiszar Ernst N | Director | Tax withholding(F) | 37 | $269.53 | $10K |
| Feb 13, 2026 | Csiszar Ernst N | Director | Grant(A) | 168 | — | $0 |
| Feb 13, 2026 | Dwyer Robert J | Director | Grant(A) | 154 | — | $0 |
| Feb 13, 2026 | Dwyer Robert J | Director | Tax withholding(F) | 34 | $269.53 | $9K |
| Feb 13, 2026 | Johnson Julia L | Director | Grant(A) | 154 | — | $0 |
| Feb 13, 2026 | Palomarez Javier Alberto | Director | Tax withholding(F) | 34 | $269.53 | $9K |
| Feb 13, 2026 | Palomarez Javier Alberto | Director | Grant(A) | 154 | — | $0 |
| Nov 14, 2025 | Csiszar Ernst N | Director | Tax withholding(F) | 52 | $192.22 | $10K |
| Nov 14, 2025 | Csiszar Ernst N | Director | Grant(A) | 235 | — | $0 |
| Nov 14, 2025 | Parker Ava L | Director | Grant(A) | 274 | — | $0 |
| Nov 14, 2025 | Parker Ava L | Director | Tax withholding(F) | 31 | $192.22 | $6K |
| Nov 14, 2025 | Campbell C Robert | Director | Grant(A) | 215 | — | $0 |
| Nov 14, 2025 | Palomarez Javier Alberto | Director | Grant(A) | 215 | — | $0 |
| Nov 14, 2025 | Palomarez Javier Alberto | Director | Tax withholding(F) | 48 | $192.22 | $9K |
| Nov 14, 2025 | Johnson Julia L | Director | Grant(A) | 215 | — | $0 |
| Nov 14, 2025 | Dwyer Robert J | Director | Grant(A) | 215 | — | $0 |
| Nov 14, 2025 | Dwyer Robert J | Director | Tax withholding(F) | 48 | $192.22 | $9K |
| Nov 3, 2025 | Love Timothy Michael | CAO | Sell(S) | 2K | $206.15 | $398K |
| Oct 10, 2025 | DiMarco Paul | CFO | Tax withholding(F) | 3K | $210.09 | $615K |
| Oct 10, 2025 | Love Timothy Michael | CAO | Tax withholding(F) | 621 | $210.09 | $130K |
| Sep 29, 2025 | Campbell C Robert | Director | Sell(S) | 2K | $210.39 | $421K |
| Sep 18, 2025 | Apple Robert E | COO | Sell(S) | 10K | $200.43 | $2.0M |
| Sep 18, 2025 | Apple Robert E | COO | Sell(S) | 100 | $201.06 | $20K |
| Sep 11, 2025 | Campbell C Robert | Director | Sell(S) | 3K | $190.39 | $571K |
| Aug 21, 2025 | Mas Jose Ramon | CEO, Director | Other(J) | 341K | — | — |
| Aug 21, 2025 | Mas Jose Ramon | CEO, Director | Other(J) | 365K | — | — |
| Aug 21, 2025 | Mas Jorge | Director | Other(J) | 1.2M | — | — |
| Aug 21, 2025 | Mas Jorge | Director | Other(J) | 1.1M | — | — |
| Aug 15, 2025 | Csiszar Ernst N | Director | Grant(A) | 254 | — | $0 |
| Aug 15, 2025 | Csiszar Ernst N | Director | Tax withholding(F) | 56 | $178.00 | $10K |
| Aug 15, 2025 | Dwyer Robert J | Director | Grant(A) | 232 | — | $0 |
| Aug 15, 2025 | Dwyer Robert J | Director | Tax withholding(F) | 52 | $178.00 | $9K |
| Aug 15, 2025 | Johnson Julia L | Director | Grant(A) | 232 | — | $0 |
| Aug 15, 2025 | Palomarez Javier Alberto | Director | Tax withholding(F) | 52 | $178.00 | $9K |
| Aug 15, 2025 | Palomarez Javier Alberto | Director | Grant(A) | 232 | — | $0 |
| Aug 15, 2025 | Campbell C Robert | Director | Grant(A) | 232 | — | $0 |
| Aug 15, 2025 | Parker Ava L | Director | Tax withholding(F) | 33 | $178.00 | $6K |
| Aug 15, 2025 | Parker Ava L | Director | Grant(A) | 295 | — | $0 |
| Aug 5, 2025 | de Cardenas Alberto | EVP, General Counsel | Sell(S) | 10K | $180.70 | $1.8M |
| Aug 5, 2025 | de Cardenas Alberto | EVP, General Counsel | Sell(S) | 100 | $180.70 | $18K |
| Jul 16, 2025 | Apple Robert E | COO | Sell(S) | 10K | $175.00 | $1.8M |
| May 15, 2025 | Parker Ava L | Director | Grant(A) | 334 | — | $0 |
| May 15, 2025 | Parker Ava L | Director | Tax withholding(F) | 37 | $157.32 | $6K |
| May 15, 2025 | Campbell C Robert | Director | Grant(A) | 263 | — | $0 |
| May 15, 2025 | Palomarez Javier Alberto | Director | Grant(A) | 263 | — | $0 |
| May 15, 2025 | Palomarez Javier Alberto | Director | Tax withholding(F) | 58 | $157.32 | $9K |
| May 15, 2025 | Johnson Julia L | Director | Grant(A) | 263 | — | $0 |
| May 15, 2025 | Dwyer Robert J | Director | Grant(A) | 263 | — | $0 |
| May 15, 2025 | Dwyer Robert J | Director | Tax withholding(F) | 58 | $157.32 | $9K |
| May 15, 2025 | Csiszar Ernst N | Director | Grant(A) | 287 | — | $0 |
| May 15, 2025 | Csiszar Ernst N | Director | Tax withholding(F) | 64 | $157.32 | $10K |
| May 13, 2025 | Campbell C Robert | Director | Sell(S) | 2K | $155.00 | $310K |
| May 12, 2025 | Campbell C Robert | Director | Sell(S) | 3K | $153.89 | $462K |
| Mar 24, 2025 | Csiszar Ernst N | Director | Sell(S) | 3K | $131.63 | $331K |
| Mar 24, 2025 | de Cardenas Alberto | EVP, General Counsel | Tax withholding(F) | 4K | $124.03 | $536K |
| Mar 24, 2025 | Mas Jose Ramon | CEO, Director | Tax withholding(F) | 24K | $124.03 | $2.9M |
| Mar 24, 2025 | Apple Robert E | COO | Tax withholding(F) | 10K | $124.03 | $1.3M |
Insider transactions sourced from SEC EDGAR Form 4 filings, normalized within minutes of acceptance. "Buy"/"Sell" mark open-market transactions (codes P/S), the tradeable signal. Awards, option exercises and tax-withholding are shown with their raw code. All data is public domain.
Coverage: Form 4 filings indexed 2006-01-02 → 2026-09-02. Earlier history is backfilling; this window widens as it deepens.
Programmatic access via the Arkolith API & MCP server (insider.transactions, insider.company).
Connected pages for MTZ