Insider buying last 90 days
No open-market insider purchases were filed for MLM in the last 90 days.
From Form 4 filings, dated to when each was filed.
Close on Sep 18, 2026. Page updated Sep 19, 9:19 pm ET.
Martin Marietta Materials closes at $490.64, down 0.8%, and sits below both its 50-day average of $537.03 and 200-day average of $596.23, with the 50-day itself below the 200-day. The stock is near its 52-week low of $488.74, well off its 52-week high of $710.97, with one-month return at -8.4% and three-month return at -19.5%. The GekkoIndex reads 69.4, placing MLM in the Accumulation zone, and price sits 10.1% below Gekko Fair Value of $546.02.
This week's news centers on the stock touching a 52-week low of $491.41, a level flagged alongside a PEG ratio some view as suggesting undervaluation relative to growth. Separately, Martin Marietta extended its $500 million trade receivables securitization facility through 15 September 2027, updating the rate to Adjusted Term SOFR plus 0.700%. BNP Paribas adjusted its price target on MLM to $565 from $590 while maintaining a Neutral rating.
Looking ahead 44 days to the next earnings date of 3 November 2026, that report falls outside a typical 20-trading-day holding window. In the last 90 days, Congress members recorded 4 buys and 0 sells, while the last 30 days show 1 unusual options signal with call premium of $1,480,900 and no put premium. Seasonally, the next 20 trading days from this point in the calendar averaged +2.6% over 5 years, rising in 4 of those years. Analyst coverage includes 12 buy ratings, 4 holds, and no sells among 16 firms, with a consensus target of $658.12.
Written by AI and checked automatically against the figures on this page. Generated Sep 20, 2026 from the data above.
Martin Marietta Materials scores 5 supportive, 0 mixed and 1 headwind across the 6 checklist items with data.
Six things swing traders check before a 20-day hold, read from the latest data.
5 supportive0 mixed1 headwind
Below 50 and 200-day
Close $490.64 is below the 50-day ($537.03) and 200-day ($596.23) averages, and the 50-day is below the 200-day.
See the chart69.4, Accumulation
Reading 69.4 is in the Accumulation zone.
See the GekkoIndex10.1% below
Price is 10.1% below Gekko Fair Value (more than 5% below).
See fair valueLeans bullish
Last 90 days: Congress 4 buys / 0 sales. Last 30 days: 1 unusual options signal.
See smart moneyReports in 44 days
Next report Nov 3, 2026, 44 days away — outside a typical 20-trading-day hold.
See earnings+2.6% on average
From this point in the calendar, the next 20 trading days averaged +2.6% over 5 years, rising in 4 of them.
See seasonalityA description of current data, not a recommendation. How this page works
Martin Marietta Materials closed at $490.64 on Sep 18, 2026, −19.5% over the past year, inside a 52-week range of $488.74 to $710.97.
Use the left and right arrow keys to read daily values.
Put MLM on a Gekko watchlist and see its GekkoIndex, Gekko Fair Value and smart money signals update on the chart as they change.
Martin Marietta Materials produces and distributes materials sourced from the earth for use in construction and infrastructure. It provides crushed stone, sand and gravel as basic inputs, plus processed goods like ready-mix concrete, asphalt and paving products. These items support roadbuilding, commercial and residential projects, and industries such as rail, farming, utilities and environmental work, reaching customers at home and overseas.
The company also makes chemicals based on magnesia for use in industry, farming and environmental settings, and it produces dolomitic lime, which finds use in steelmaking and in stabilizing soil. Additional chemical lines feed into flame retardant products, treatment of wastewater, and paper and pulp manufacturing, among other environmental purposes.
Founded in 1939, the company keeps its headquarters in Raleigh, North Carolina. Its stock trades on the NYSE under the ticker MLM.
Martin Marietta Materials’s GekkoIndex — Gekko’s 0 to 100 smart money score — reads 69.4, in the Accumulation zone, up 4.2 points over five sessions.
Up 4.2 points over five sessions.
Reading for Sep 18, 2026
| Zone | Readings | 5 days | 20 days | ||
|---|---|---|---|---|---|
| Buying | 45 | −0.1% | +4.3% | ||
| Accumulation (current zone) | 204 | 0.0% | +0.3% | ||
| Neutral | 383 | +0.2% | −0.3% | ||
| Distribution | 29 | 0.0% | +2.1% | ||
| Selling | 1 | Too few readings yet | |||
Average MLM share-price change over the trading days after each daily reading in its GekkoIndex history. Across every stock Gekko tracks, Accumulation readings averaged +2.3% over 20 days. Past behaviour doesn’t guarantee future results.
Accumulation zone: Institutional interest building. About the five zones →
Martin Marietta Materials trades 10.1% below Gekko Fair Value of $546.02, so the shares are undervalued on Gekko’s estimate.
Gekko’s own estimate of what Martin Marietta Materials shares are worth, recalculated every trading day.
$546.02
Gekko Fair Value, Sep 19, 2026
10.1% Undervalued
No open-market insider purchases were filed for Martin Marietta Materials, and members of Congress disclosed 4 purchases and 0 sales, in the last 90 days.
Plus buybacks, unusual options and fund positions, each dated to when it became public.
No open-market insider purchases were filed for MLM in the last 90 days.
From Form 4 filings, dated to when each was filed.
4trades disclosed: 4 purchases and 0 sales.
| Member | Amount | Disclosed |
|---|---|---|
| April Delaney House, MD, purchase | $1,001 - $15,000 | Sep 10 traded Aug 19 |
| April McClain Delaney House, MD, purchase | $15,001 - $50,000 | Aug 4 traded Jul 24 |
| April McClain Delaney House, MD, purchase | $1,001 - $15,000 | Aug 4 traded Jul 20 |
| April McClain Delaney House, MD, purchase | $1,001 - $15,000 | Aug 4 traded Jul 17 |
From congressional disclosures, which report amounts as ranges.
Martin Marietta Materials has been buying back its own shares.
From company filings.
1signal, 100% of the flagged premium in calls.
Latest: Bullish flow on Sep 16, $1.48M in unusual premium.
4of the funds Gekko tracks hold MLM.
Martin Marietta Materials reports on Nov 3, 2026 (44 days away), and beat the EPS estimate in 6 of its last 8 reports.
Nov 3, 2026
44 days away
| Reported | EPS | Revenue | Move |
|---|---|---|---|
| Jul 30, 2026 | $5.00 est $4.62 | $1.95B est $1.87B | −7.8% |
| Apr 30, 2026 | $1.93 est $1.86 | $1.36B est $1.31B | +0.3% |
| Feb 11, 2026 | $4.62 est $4.84 | $1.53B est $1.65B | −6.8% |
| Nov 4, 2025 | $6.85 est $6.64 | $1.85B est $2.07B | −1.4% |
| Aug 7, 2025 | $5.43 est $5.31 | $1.81B est $1.87B | +2.2% |
| Apr 30, 2025 | $1.93 est $1.83 | $1.35B est $1.36B | +3.6% |
| Feb 12, 2025 | $4.81 est $4.56 | $1.63B est $1.65B | +0.5% |
| Oct 30, 2024 | $5.91 est $6.28 | $1.89B est $1.93B | +1.4% |
“Move” is the close of the first session after the report compared with the close of the last session before it, so it reads the same whether the company reported before the open or after the close.
Analysts’ average 12-month price target for Martin Marietta Materials is $658.12, +34.1% from the last close, from 16 firms rating the stock in the last 90 days.
Each firm’s latest rating in the last 90 days: 16 firms.
| Date | Firm | Target | vs price |
|---|---|---|---|
| Sep 18 | Oppenheimer | — | — |
| Sep 11 | Jefferies | $720 | +46.7% |
| Sep 9 | Wells Fargo | $609 | +24.1% |
| Sep 2 | J.P. Morgan | $680 | +38.6% |
| Aug 28 | RBC Capital | $620 | +26.4% |
Gekko doesn’t publish price predictions. These are analyst targets and historical base rates, which don’t guarantee future results.
Over the next 20 trading days from Sep 19, Martin Marietta Materials averaged +2.6% across the last 5 years, rising in 4 of them.
| Window | Average | Years higher |
|---|---|---|
| Next 5 trading days | −1.2% | 2 of 5 |
| Next 10 trading days | −1.0% | 2 of 5 |
| Next 15 trading days | 0.0% | 3 of 5 |
| Next 20 trading days | +2.6% | 4 of 5 |
| Next 30 trading days | +4.6% | 3 of 5 |
For scale, MLM’s typical 20-trading-day move in either direction is about 4.9%.
Martin Marietta Materials’s market cap is $29.47B, with a P/E ratio of 31.9 and revenue of $6.69B over the last twelve months.
Coverage of Martin Marietta Materials this week reads negative: 1 positive, 1 neutral and 2 negative headlines.
Martin Marietta Materials’s 6 largest industry peers by market value, with today’s move, GekkoIndex zone and gap to Gekko Fair Value.
| Stock | GekkoIndex zone | vs Fair Value |
|---|---|---|
| CRHCRH | Accumulation | 29.7% below |
| VMCVulcan Materials | Buying | 11.1% below |
| AMRZAmrize | Buying | 36.2% below |
| JHXJames Hardie Industries | Buying | 9.2% below |
| ACAArcosa | Neutral | 24.7% above |
| EXPEagle Materials | Buying | 8.1% below |
A peer links to its own page where one exists.
Martin Marietta Materials’s market cap is $29.47B at the Sep 18, 2026 close of $490.64, with 71.02M shares outstanding. The shares trade on a P/E ratio of 31.9.
The consensus analyst 12-month price target for Martin Marietta Materials is $658.12, +34.1% from the last close. Of the 16 firms that rated the stock in the last 90 days, 12 rate it a buy, 4 a hold and 0 a sell. Gekko doesn’t publish price predictions of its own.
On Gekko’s estimate Martin Marietta Materials is undervalued: the Sep 18, 2026 close of $490.64 is 10.1% below Gekko Fair Value of $546.02. Gekko Fair Value is recalculated every trading day, and a gap inside 5% either way counts as about fair value.
Martin Marietta Materials is expected to report on Nov 3, 2026 (44 days away). Analysts expect earnings of $6.57 per share on revenue of $2.17B. Martin Marietta Materials beat the earnings estimate in 6 of its last 8 reports, moving 3% on average across the report.
Martin Marietta Materials’s 52-week high is $710.97 and its 52-week low is $488.74; it closed at $490.64 on Sep 18, 2026, −19.5% over the past year.
Gekko describes the data; it does not make buy or sell recommendations. On the swing-trade checklist, 5 of the 6 items with data read as supportive (gekkoindex, fair value, smart money, earnings risk and seasonality) and 1 as a headwind (trend). The checklist is a description of current data, not a recommendation.
Gekko flagged 1 unusual options signal in Martin Marietta Materials over the last 30 days, with $1.48M of flagged premium in calls and $0 in puts. The latest, bullish flow, was on Sep 16, 2026 with $1.48M in unusual premium. The signal-by-signal table is in Gekko.
Prices and signals update after every US market close; the GekkoIndex, Gekko Fair Value and the checklist are Gekko’s own, and the Gekko Brief is written by AI from this page’s data and checked against it before it is published. How Gekko’s data works →
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