MARTIN MARIETTA MATERIALS INC (MLM) is a publicly traded company in the Unknown sector. Across all available filings, 31 corporate insiders have executed 1026 transactions totaling $107.7M, demonstrating a bearish sentiment with -$92.6M in net insider flow. The most recent transaction on Feb 24, 2026 involved a transaction of 103 shares valued at $71.8K.
No significant insider buying has been recorded for MLM in the recent period.
No significant insider selling has been recorded for MLM in the recent period.
Based on recent SEC filings, insider sentiment for MLM is bearish with an Insider Alignment Score of 7/100 and a net flow of -$92.6M. Insiders are reducing their positions, though this can be driven by factors unrelated to company outlook.
Insider trading at MARTIN MARIETTA MATERIALS INC (MLM) refers to stock transactions made by corporate insiders—executives, directors, and beneficial owners holding more than 10% of the company's shares. These individuals have access to material non-public information and are required by law to report their trades to the SEC within two business days. Currently, 31 insiders are actively trading MLM stock, having executed 1026 transactions in the past 90 days. The most active insider is C. Howard Nye (Executive), who has made 110 transactions totaling $102.4M.
Get notified when executives and directors at MLM file new Form 4 transactions
Date | Insider | Title | Type | Shares | Price | Value | Flags |
|---|---|---|---|---|---|---|---|
| Feb 24, 2026 | J. Cardin Robert | SVP, Controller & CAO | Payment | 103 | $696.85 | $71.8K | |
| Feb 24, 2026 | Paul Flynn Jason | SVP and CIO | Payment | 30 | $696.85 | $20.9K | |
| Feb 24, 2026 | Howard Nye C. | Executive | Payment | 1,221 | $696.85 | $850.9K | Large |
| Feb 24, 2026 | J. Petro Michael | SVP and CFO | Payment | 94 | $696.85 | $65.5K | C-Suite |
| Feb 23, 2026 | J. Cardin Robert | SVP, Controller & CAO | Payment | 209 | $683.60 | $142.9K | |
| Feb 23, 2026 | Paul Flynn Jason | SVP and CIO | Payment | 177 | $683.60 | $121.0K | |
| Feb 23, 2026 | A. Mccunniff Donald | EVP and CHRO | Payment | 192 | $683.60 | $131.3K | |
| Feb 23, 2026 | Howard Nye C. | Executive | Payment | 1,805 | $683.60 | $1.2M | Large |
| Feb 23, 2026 | J. Petro Michael | SVP and CFO | Payment | 211 | $683.60 | $144.2K | C-Suite |
| Feb 20, 2026 | A. Mccunniff Donald | EVP and CHRO | Award | 1,277 | $N/A | $0 | |
| Feb 20, 2026 | J. Petro Michael | SVP and CFO | Award | 931 | $N/A | $0 | C-Suite |
| Dec 16, 2025 | R. Bar Roselyn | Executive | Payment | 66 | $629.49 | $41.5K | |
| Dec 16, 2025 | J. Cardin Robert | Executive | Payment | 32 | $629.49 | $20.1K | |
| Dec 16, 2025 | A. Mccunniff Donald | Executive | Payment | 50 | $629.49 | $31.5K | |
| Dec 16, 2025 | Howard Nye C. | Executive | Payment | 298 | $629.49 | $187.6K |
| TYPE | COUNT | VALUE | % |
|---|---|---|---|
Sale(S) | 93 | $100.1M | 45.6% |
Payment(F) | 277 | $85.1M | 38.8% |
Award(A) | 519 | $24.8M | 11.3% |
Purchase(P) | 48 | $7.5M | 3.4% |
Exercise(M) | 71 | $1.9M | 0.9% |
Small Acquisition(L) | 8 | $24.3K | 0.0% |
Gift(G) | 8 | $0 | 0.0% |
Other(J) | 2 | $0 | 0.0% |
Insider selling pressure at MARTIN MARIETTA MATERIALS INC has increased, with 31 insiders executing 1026 transactions across all time. Total sales of $100.1M significantly outpace purchases of $7.5M, resulting in a net outflow of $92.6M. This selling activity appears largely discretionary, which may warrant closer attention from investors.