XOOMAR

MARTIN MARIETTA MATERIALS INC (MLM)

Every FINRA and SEC series the site collects for MARTIN MARIETTA MATERIALS INC: short interest with days to cover, daily short sale volume, fails to deliver and Form 4 insider trades. Listed on NYSE, classified by the SEC as mining & quarrying of nonmetallic minerals (no fuels).

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2.7M

Short interest

settlement 2026-08-31

4.4

Days to cover

+19.6% vs prior

69.5%

Short share of volume

2026-09-11

5,042

Fails to deliver

settlement 2026-08-05

$0

Insider flow, 90 days

0 buys, 0 sells

As of 2026-09-11.

Short interest

FINRA, twice a month; the last 12 months shown, all 48 settlements in the JSON

As of 31 August 2026, short interest in MLM is 2,706,782 shares, up 326,149 shares over the last month. Over the last 48 readings it ranged from 1,316,280 shares (31 January 2025) to 2,706,782 shares (31 August 2026). The latest reading sits at the top of that range. At the reported average volume of 620K shares a day that is 4.4 days to cover.

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SettlementShares shortChangeAvg daily volumeDays to cover
2026-08-312,706,782+19.6%620,2924.36
2026-08-142,262,403-5.0%480,0994.71
2026-07-312,380,633-2.7%648,6273.67
2026-07-152,445,770+9.7%578,9994.22
2026-06-302,229,187+3.2%738,4513.02
2026-06-152,160,946-2.5%505,9344.27
2026-05-292,215,305+33.1%659,3083.36
2026-05-151,664,180+15.6%479,0793.47
2026-04-301,439,413-14.2%520,6372.76
2026-04-151,677,013-11.3%337,9264.96
2026-03-311,890,998+9.7%561,6953.37
2026-03-131,723,193-3.6%655,0012.63
2026-02-271,788,257+9.6%597,8962.99
2026-02-131,632,050-22.8%595,2832.74
2026-01-302,114,191+5.6%359,7715.88
2026-01-152,002,181+0.6%467,1354.29
2025-12-311,989,623+14.2%414,8034.80
2025-12-151,742,510+7.2%363,0784.80
2025-11-281,625,834+1.8%441,9643.68
2025-11-141,596,544-0.1%472,2283.38
2025-10-311,597,944-10.2%306,2815.22
2025-10-151,779,938+7.2%327,1765.44
2025-09-301,660,226+0.5%362,5124.58
2025-09-151,652,791-1.9%364,6884.53

Daily short volume

FINRA Reg SHO, last 60 sessions. JSON

As of 11 September 2026, the short share of MLM volume is 69.5%, up 11.8 points over the last five sessions. Over the last 52 readings it ranged from 38.1% (2 September 2026) to 85.2% (8 July 2026). The latest reading is 11.0 points above the 30-session average of 58.5%, on 335K shares reported.

DateShort volumeTotal volumeShort shareExempt
2026-09-11233K335K69.5%10
2026-09-10200K363K55.1%17
2026-09-09219K467K46.8%0
2026-09-08202K382K53.0%0
2026-09-04127K270K46.9%30
2026-09-03153K265K57.7%0
2026-09-02202K530K38.1%13
2026-09-01179K413K43.3%0
2026-08-31128K239K53.4%269
2026-08-28141K238K59.1%0
2026-08-27153K236K64.8%18
2026-08-26146K210K69.9%0
2026-08-25139K235K59.0%0
2026-08-24125K214K58.2%350
2026-08-21130K239K54.3%606
2026-08-20163K262K62.1%1
2026-08-19206K322K64.1%2,564
2026-08-18226K397K57.0%243
2026-08-17210K338K61.9%266
2026-08-1488K123K71.1%84
2026-08-1396K153K62.7%0
2026-08-12119K184K64.6%0
2026-08-1170K130K53.9%0
2026-08-10101K150K67.6%0
2026-08-07116K200K57.8%0
2026-08-06157K280K55.8%143
2026-08-05152K259K58.9%0
2026-08-04180K330K54.4%50
2026-08-03244K379K64.3%0
2026-07-31283K411K68.8%1,604

Fails to deliver

SEC, by settlement date. JSON

As of 5 August 2026, the fails-to-deliver balance in MLM is 5,042 shares, up 4,165 shares over the last settlement date. Over the last 52 readings it ranged from 1 share (2 September 2025) to 65,375 shares (17 December 2025). The latest reading sits at the bottom of that range.

SettlementShares failedPriceValue
2026-08-055,042$555.82$2.8M
2026-08-03877$525.14$461K
2026-07-234,132$550.66$2.3M
2026-07-22166$547.33$91K
2026-07-21263$553.62$146K
2026-07-161,604$569.32$913K
2026-07-141,232$569.35$701K
2026-07-02151$579.24$87K
2026-07-01158$576.70$91K
2026-06-3013,092$581.23$7.6M
2026-06-221,492$609.12$909K
2026-06-10131$572.25$75K
2026-05-2927$575.14$16K
2026-05-26603$536.48$323K
2026-05-141$576.79$577
2026-05-05187$603.29$113K
2026-05-04261$614.49$160K
2026-04-232,492$610.64$1.5M
2026-04-2010,807$622.02$6.7M
2026-04-15119$630.80$75K
2026-04-10239$625.50$149K
2026-04-091,502$624.36$938K
2026-04-08791$594.43$470K
2026-03-256$576.18$3K
2026-03-241,409$577.59$814K
2026-03-236$560.69$3K
2026-03-0630$632.93$19K
2026-03-021$676.57$677
2026-02-2621$673.29$14K
2026-02-2035$675.40$24K

Insider trades

SEC Form 4, newest first, 50 of 100 shown. JSON

No open-market insider trades were reported for MLM in the last 90 days. The most recent filings are listed below; grants and option exercises carry a weaker signal than voluntary trades. Latest filing: Petro Michael J (SVP and CFO) on 2026-09-01.

DateInsiderTitleTypeSharesPriceValueOwned after
2026-09-01Petro Michael JSVP and CFOGrant9K$0.00$024K
2026-08-31WAJSGRAS DAVID Cn/aGrant78$518.70$40K5K
2026-08-31Pike Thomasn/aGrant66$518.70$34K5K
2026-08-31LYONS MARTIN Jn/aGrant68$518.70$35K442
2026-08-21Niemann Philippn/aGrant337$0.00$0337
2026-08-03Petro Michael JSVP and CFOTax withholding368$542.27$200K15K
2026-05-29WAJSGRAS DAVID Cn/aGrant69$581.64$40K5K
2026-05-29Pike Thomasn/aGrant59$581.64$34K5K
2026-05-29LYONS MARTIN Jn/aGrant61$581.64$35K374
2026-05-14WAJSGRAS DAVID Cn/aGrant313$0.00$05K
2026-05-14SLAGER DONALD Wn/aGrant313$0.00$05K
2026-05-14Pike Thomasn/aGrant313$0.00$05K
2026-05-14PEREZ LAREE En/aGrant313$0.00$016K
2026-05-14Mack Mary Tn/aGrant313$0.00$0914
2026-05-14LYONS MARTIN Jn/aGrant313$0.00$0313
2026-05-14Foxx Anthony Rn/aGrant313$0.00$03K
2026-05-14DELLY GAYLA Jn/aGrant313$0.00$0313
2026-05-14Ables Dorothy Mn/aGrant313$0.00$04K
2026-05-01Samborski Christopher WilliamEVP, COOGrant8K$0.00$022K
2026-03-01Schoen George FrederickEVP, GC and Corp. SecretaryGrant24K$0.00$024K
2026-03-01Petro Michael JSVP and CFOGrant3K$0.00$015K
2026-03-01Nye C HowardChairman, Pres &amp; CEOGrant6K$0.00$0176K
2026-03-01McCunniff Donald A.EVP and CHROGrant3K$0.00$08K
2026-02-27WAJSGRAS DAVID Cn/aGrant56$676.57$38K5K
2026-02-27Pike Thomasn/aGrant47$676.57$32K5K
2026-02-27KORALESKI JOHN Jn/aGrant69$676.57$47K9K
2026-02-24Petro Michael JSVP and CFOTax withholding94$696.85$66K12K
2026-02-24Nye C HowardChairman, Pres &amp; CEOTax withholding1K$696.85$851K170K
2026-02-24Flynn Jason PaulSVP and CIOTax withholding30$696.85$21K5K
2026-02-24Cardin Robert JSVP, Controller &amp; CAOTax withholding103$696.85$72K12K
2026-02-23Petro Michael JSVP and CFOTax withholding211$683.60$144K12K
2026-02-23Nye C HowardChairman, Pres &amp; CEOTax withholding2K$683.60$1.2M171K
2026-02-23McCunniff Donald A.EVP and CHROTax withholding192$683.60$131K5K
2026-02-23Flynn Jason PaulSVP and CIOTax withholding177$683.60$121K6K
2026-02-23Cardin Robert JSVP, Controller &amp; CAOTax withholding209$683.60$143K13K
2026-02-20Petro Michael JSVP and CFOGrant931$0.00$013K
2026-02-20Nye C HowardChairman, Pres &amp; CEOGrant6K$0.00$0173K
2026-02-20Nye C HowardChairman, Pres &amp; CEOGrant2K$548.75$1.2M167K
2026-02-20McCunniff Donald A.EVP and CHROGrant1K$0.00$05K
2026-02-20Flynn Jason PaulSVP and CIOGrant595$0.00$06K
2026-02-20Flynn Jason PaulSVP and CIOGrant592$548.75$325K5K
2026-02-20Cardin Robert JSVP, Controller &amp; CAOGrant658$0.00$013K
2026-02-17Petro Michael JSVP and CFOTax withholding758$666.53$505K12K
2026-02-17Petro Michael JSVP and CFOGrant2K$0.00$013K
2026-02-17Nye C HowardChairman, Pres &amp; CEOTax withholding10K$666.53$6.5M165K
2026-02-17Nye C HowardChairman, Pres &amp; CEOGrant22K$0.00$0174K
2026-02-17Flynn Jason PaulSVP and CIOTax withholding107$666.53$71K5K
2026-02-17Flynn Jason PaulSVP and CIOGrant222$0.00$05K
2026-02-17Cardin Robert JSVP, Controller &amp; CAOTax withholding822$666.53$548K12K
2026-02-17Cardin Robert JSVP, Controller &amp; CAOGrant2K$0.00$013K

Form 4 filings are due within two business days of the trade. Insiders sell for many reasons that say nothing about the company; open-market buys are the rarer, stronger signal.

Large holders (13D and 13G)

One row per reporting person, newest filing first. JSON

8 holders above 5% have filed on MLM, 4 on Schedule 13D (active intent). The largest reported stake is LNA Holding SRL at 15.4% of the class (10,953,543 shares), filed 2026-08-24 for an event on 2026-08-21.

FiledFormHolderSharesOf classEvent
2026-08-2413DLNA Holding SRLcorporation11.0M15.4%2026-08-21
2026-08-2413DKalk en Dolomiet Maatschappij SAcorporation11.0M15.4%2026-08-21
2026-08-2413DFinanciere de Gestions Internationales SCAcorporation11.0M15.4%2026-08-21
2026-08-2413DGPI SAcorporation11.0M15.4%2026-08-21
2026-08-0713GSTATE STREET CORPORATIONparent holding company3.2M5.2%2026-06-30
2026-04-3013GVanguard Capital Managementinvestment adviser4.5M7.5%2026-03-31
2026-04-2913GVanguard Portfolio Managementinvestment adviser3.2M5.3%2026-03-31
2026-03-2713G/Ano. 12The Vanguard Groupinvestment adviser00.0%2026-03-13

13F holders

Tracked managers holding MLM at their latest 13F. JSON

7 of the 30 tracked managers held MLM at their latest 13F, $162.5M in total at quarter-end prices. Citadel Advisors is the largest at $41.6M (0.0% of its portfolio) as of 2026-06-30. Over the prior quarter 6 added shares and 1 cut.

FundQuarterSharesValueOf portfolioChange in shares
Citadel Advisors2026-06-3072K$41.6M0.00%+19K
AQR Capital Management2026-06-3067K$38.6M0.01%+2K
Millennium Management2026-06-3057K$32.6M0.01%+39K
Two Sigma Investments2026-06-3051K$29.7M0.02%-43K
Renaissance Technologies2026-06-3032K$18.4M0.03%+24K
D. E. Shaw & Co.2026-06-301K$825K0.00%+230
Point72 Asset Management2026-06-301K$750K0.00%+100

Only the 30 tracked managers on the funds hub; a 13F reports long positions in US listed stock at quarter end, 45 days late, and says nothing about shorts or positions sold since.

Financials

SEC XBRL, as filed. JSON

In Q2 2026 (quarter ended 2026-06-30) MARTIN MARIETTA MATERIALS INC reported revenue of $1.95B, up 21.0% from the same quarter a year earlier, and net income of $251.0M (4.17 diluted EPS). In FY 2025 it generated $1.78B of operating cash flow and spent $450.0M on buybacks and $197.0M on dividends. As of 2026-06-30, cash was $112.0M against $5.95B of debt.

Cash
$112.0M
Debt
$5.95B
Equity
$11.55B
Total assets
$21.30B
Shares outstanding
60,065,839

Quarterly, last 8 quarters

QuarterPeriod endRevenueNet incomeMarginDiluted EPS
Q2 20262026-06-30$1.95B$251.0M12.9%4.17
Q1 20262026-03-31$1.36B$1.51B111.1%25.06
Q4 20252025-12-31$1.53B$279.0M18.2%n/a
Q3 20252025-09-30$1.85B$414.0M22.4%6.85
Q2 20252025-06-30$1.61B$328.0M20.4%5.43
Q1 20252025-03-31$1.16B$116.0M10.0%1.90
Q4 20242024-12-31$1.41B$294.0M20.8%n/a
Q3 20242024-09-30$1.64B$363.0M22.1%5.91

Fiscal years, with buybacks and dividends

Fiscal yearEndsRevenueNet incomeOperating cash flowCapexBuybacksDividends
FY 20252025-12-31$6.15Bn/a$1.78B$807.0M$450.0M$197.0M
FY 20242024-12-31$5.66Bn/a$1.46B$855.0M$450.0M$189.0M
FY 20232023-12-31$5.85Bn/a$1.53B$650.0M$150.0M$174.0M
FY 20222022-12-31$6.16Bn/a$991.0M$482.0M$150.0M$160.0M
FY 20212021-12-31$5.41Bn/a$1.14B$423.1M$0$147.8M

Quarters are the three-month figures the company reports; a fourth quarter marked derived is the fiscal year less the three reported quarters, since companies report it only inside the 10-K. Fiscal years are the annual figures. Buybacks are cash paid to repurchase common stock in the year (XBRL PaymentsForRepurchaseOfCommonStock), not authorizations. Balance sheet lines are as of 2026-06-30; shares outstanding as of 2026-07-27 from the cover page.

What this page is

MARTIN MARIETTA MATERIALS INC in the regulatory record

Regulators publish company data in separate files that never sit next to each other: FINRA's twice-monthly short interest, its daily short sale volume, the SEC's fails-to-deliver counts, and each insider's Form 4. A company page pulls every series the site collects for one ticker onto one URL, keyed by the SEC's own ticker list, so the short position, the daily flow, the settlement fails and what insiders are doing can be read together.

Each section has its own history table, a summary sentence built from the rows (last value, change, range with dates) and its own JSON and CSV links. Nothing on the page is written by a model; the sentences change only when the data does. A page exists only for companies with data in at least two series, and every section says when its source last updated.

This page follows MARTIN MARIETTA MATERIALS INC (MLM), SEC CIK 916076, listed on NYSE, classified by the SEC as mining & quarrying of nonmetallic minerals (no fuels). The cross-market tables live on the short interest and insider transactions hubs.

Source and method

Short interest
FINRA consolidated short interestTwice a month, about eight business days after settlement. Latest 2026-08-31.JSON and CSV
Daily short volume
FINRA Reg SHO daily filesEvery trading day, loaded the following morning. Latest 2026-09-11.JSON and CSV
Fails to deliver
SEC fails-to-deliver dataTwice a month, a few weeks after the half month ends. Latest 2026-08-05.JSON and CSV
Large holders
SEC EDGAR Schedule 13D and 13GEDGAR read every 30 minutes; 13D within five business days of crossing 5%, 13G on the passive schedule. Latest 2026-08-24.JSON and CSV
13F holders
SEC EDGAR Form 13F-HRQuarterly, filed within 45 days of quarter end; 30 tracked managers. Latest 2026-06-30.JSON and CSV
Financials
SEC XBRL company factsRefreshed weekly from the SEC's structured data; values are as filed in the 10-Q and 10-K. Latest 2026-06-30.JSON and CSV
Insider trades
SEC EDGAR Form 4EDGAR read every 30 minutes; filings are due two business days after the trade. Latest 2026-09-01.JSON and CSV
Company record
EDGAR filing index for CIK 916076Ticker, name and exchange from the SEC's company list, refreshed weekly.
Rate limits
30 requests a minute without a key, 120 a minute with a key from a free account.

Data checks. Every dataset is checked against its source once a day. This dataset passed the last run, 14 Sep 05:40 UTC.

How to read it

  • Read the position against the flow: rising short interest with a high daily short share is new shorting; rising short interest with a normal short share is old shorts holding on.
  • Insider buys next to a crowded short are the combination that has historically preceded squeezes; insider sells next to a crowded short are common and mean little.
  • Fails to deliver matter relative to the float, not in absolute shares; a million failed shares in a mega cap is noise.

Analysis of what the data shows, not advice. XOOMAR does not recommend buying, selling or holding anything.

Other companies the SEC classifies as mining & quarrying of nonmetallic minerals (no fuels)

Datasets

Frequently Asked Questions

How much of MLM is sold short?
2,706,782 shares were held short at the 2026-08-31 settlement, 4.4 days of average volume. FINRA publishes the next count about eight business days after the 15th and the last business day of the month.
What is MLM's daily short volume?
On 2026-09-11, 232,573 of the 334,818 MLM shares reported to FINRA were sold short, 69.5% of the day's reported volume. Short volume is a flow for one day, not a position.
Does MLM have fails to deliver?
The SEC's latest file shows 5,042 MLM shares failed to deliver at settlement 2026-08-05. Fails are reported per settlement date and published twice a month with a lag.
Are MLM insiders buying or selling?
No open-market insider trades were reported for MLM in the last 90 days. The most recent filings are listed below; grants and option exercises carry a weaker signal than voluntary trades. Latest filing: Petro Michael J (SVP and CFO) on 2026-09-01.
Who owns more than 5% of MLM?
8 holders above 5% have filed on MLM, 4 on Schedule 13D (active intent). The largest reported stake is LNA Holding SRL at 15.4% of the class (10,953,543 shares), filed 2026-08-24 for an event on 2026-08-21.
What did MLM report last quarter?
In Q2 2026 (quarter ended 2026-06-30) MARTIN MARIETTA MATERIALS INC reported revenue of $1.95B, up 21.0% from the same quarter a year earlier, and net income of $251.0M (4.17 diluted EPS). In FY 2025 it generated $1.78B of operating cash flow and spent $450.0M on buybacks and $197.0M on dividends. As of 2026-06-30, cash was $112.0M against $5.95B of debt.
Which funds hold MLM?
7 of the 30 tracked managers held MLM at their latest 13F, $162.5M in total at quarter-end prices. Citadel Advisors is the largest at $41.6M (0.0% of its portfolio) as of 2026-06-30. Over the prior quarter 6 added shares and 1 cut.

Data on this page is provided for informational purposes only and is not financial advice. See our editorial policy.